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Sisnande T, Brum FL, Matias DO, de Sá Ribeiro F, Moulin TB, Mohana-Borges R, de Magalhães MTQ, Lima LMTR. Spatially resolved distribution of pancreatic hormones proteoforms by MALDI-imaging mass spectrometry. Anal Biochem 2024; 692:115570. [PMID: 38763320 DOI: 10.1016/j.ab.2024.115570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 05/09/2024] [Accepted: 05/13/2024] [Indexed: 05/21/2024]
Abstract
Zinc plays a crucial role both in the immune system and endocrine processes. Zinc restriction in the diet has been shown to lead to degeneration of the endocrine pancreas, resulting in hormonal imbalance within the β-cells. Proteostasismay vary depending on the stage of a pathophysiological process, which underscores the need for tools aimed at directly analyzing biological status. Among proteomics methods, MALDI-ToF-MS can serve as a rapid peptidomics tool for analyzing extracts or by histological imaging. Here we report the optimization of MALDI imaging mass spectrometry analysis of histological thin sections from mouse pancreas. This optimization enables the identification of the major islet peptide hormones as well as the major accumulated precursors and/or proteolytic products of peptide hormones. Cross-validation of the identified peptide hormones was performed by LC-ESI-MS from pancreatic islet extracts. Mice subjected to a zinc-restricted diet exhibited a relatively lower amount of peptide intermediates compared to the control group. These findings provide evidence for a complex modulation of proteostasis by micronutrients imbalance, a phenomenon directly accessed by MALDI-MSI.
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Affiliation(s)
- Tháyna Sisnande
- Laboratório de Biotecnologia Farmacêutica (pbiotech), Faculdade de Farmácia, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil; Programa de Pós-Graduação Em Química Biológica, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.
| | - Felipe Lopes Brum
- Laboratório de Biotecnologia e Bioengenharia Estrutural (LABGENEST), Instituto de Biofísica Carlos Chagas Filho (IBCCF), Rio de Janeiro, RJ, 21941-902, Brazil.
| | - Daiane O Matias
- Laboratório de Biotecnologia Farmacêutica (pbiotech), Faculdade de Farmácia, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil; Programa de Pós-Graduação Em Química Biológica, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.
| | - Fernando de Sá Ribeiro
- Laboratório de Biotecnologia Farmacêutica (pbiotech), Faculdade de Farmácia, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil; Programa de Pós-Graduação Em Química Biológica, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.
| | - Thayana Beninatto Moulin
- Laboratório de Biotecnologia Farmacêutica (pbiotech), Faculdade de Farmácia, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.
| | - Ronaldo Mohana-Borges
- Laboratório de Biotecnologia e Bioengenharia Estrutural (LABGENEST), Instituto de Biofísica Carlos Chagas Filho (IBCCF), Rio de Janeiro, RJ, 21941-902, Brazil; Centro de Espectrometria de Massa de Biomoléculas (CEMBIO), Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.
| | - Mariana T Q de Magalhães
- Laboratório de Biofísica de Macromoléculas (LBM), Instituto de Ciências Biomédicas (ICB), Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil.
| | - Luís Maurício T R Lima
- Laboratório de Biotecnologia Farmacêutica (pbiotech), Faculdade de Farmácia, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil; Programa de Pós-Graduação Em Química Biológica, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil; Programa de Pós-Graduação Em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.
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2
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Di Piazza E, Todi L, Di Giuseppe G, Soldovieri L, Ciccarelli G, Brunetti M, Quero G, Alfieri S, Tondolo V, Pontecorvi A, Gasbarrini A, Nista EC, Giaccari A, Pani G, Mezza T. Advancing Diabetes Research: A Novel Islet Isolation Method from Living Donors. Int J Mol Sci 2024; 25:5936. [PMID: 38892122 PMCID: PMC11172646 DOI: 10.3390/ijms25115936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 05/23/2024] [Accepted: 05/27/2024] [Indexed: 06/21/2024] Open
Abstract
Pancreatic islet isolation is critical for type 2 diabetes research. Although -omics approaches have shed light on islet molecular profiles, inconsistencies persist; on the other hand, functional studies are essential, but they require reliable and standardized isolation methods. Here, we propose a simplified protocol applied to very small-sized samples collected from partially pancreatectomized living donors. Islet isolation was performed by digesting tissue specimens collected during surgery within a collagenase P solution, followed by a Lympholyte density gradient separation; finally, functional assays and staining with dithizone were carried out. Isolated pancreatic islets exhibited functional responses to glucose and arginine stimulation mirroring donors' metabolic profiles, with insulin secretion significantly decreasing in diabetic islets compared to non-diabetic islets; conversely, proinsulin secretion showed an increasing trend from non-diabetic to diabetic islets. This novel islet isolation method from living patients undergoing partial pancreatectomy offers a valuable opportunity for targeted study of islet physiology, with the primary advantage of being time-effective and successfully preserving islet viability and functionality. It enables the generation of islet preparations that closely reflect donors' clinical profiles, simplifying the isolation process and eliminating the need for a Ricordi chamber. Thus, this method holds promises for advancing our understanding of diabetes and for new personalized pharmacological approaches.
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Affiliation(s)
- Eleonora Di Piazza
- Endocrinology and Diabetology Unit, Fondazione Policlinico Universitario Gemelli IRCCS, 00168 Roma, Italy
| | - Laura Todi
- Endocrinology and Diabetology Unit, Fondazione Policlinico Universitario Gemelli IRCCS, 00168 Roma, Italy
| | - Gianfranco Di Giuseppe
- Endocrinology and Diabetology Unit, Fondazione Policlinico Universitario Gemelli IRCCS, 00168 Roma, Italy
- Department of Medicine and Translational Surgery, General Pathology Section, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
| | - Laura Soldovieri
- Endocrinology and Diabetology Unit, Fondazione Policlinico Universitario Gemelli IRCCS, 00168 Roma, Italy
- Department of Medicine and Translational Surgery, General Pathology Section, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
| | - Gea Ciccarelli
- Endocrinology and Diabetology Unit, Fondazione Policlinico Universitario Gemelli IRCCS, 00168 Roma, Italy
- Department of Medicine and Translational Surgery, General Pathology Section, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
| | - Michela Brunetti
- Endocrinology and Diabetology Unit, Fondazione Policlinico Universitario Gemelli IRCCS, 00168 Roma, Italy
- Department of Medicine and Translational Surgery, General Pathology Section, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
| | - Giuseppe Quero
- Department of Medicine and Translational Surgery, General Pathology Section, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
- Digestive Surgery Unit, Fondazione Policlinico Universitario Gemelli IRCCS, 00168 Roma, Italy
- Digestive Surgery Unit, Ospedale Isola Tiberina—Gemelli Isola, 00186 Roma, Italy
| | - Sergio Alfieri
- Department of Medicine and Translational Surgery, General Pathology Section, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
- Digestive Surgery Unit, Fondazione Policlinico Universitario Gemelli IRCCS, 00168 Roma, Italy
- Digestive Surgery Unit, Ospedale Isola Tiberina—Gemelli Isola, 00186 Roma, Italy
| | - Vincenzo Tondolo
- Digestive Surgery Unit, Ospedale Isola Tiberina—Gemelli Isola, 00186 Roma, Italy
| | - Alfredo Pontecorvi
- Endocrinology and Diabetology Unit, Fondazione Policlinico Universitario Gemelli IRCCS, 00168 Roma, Italy
- Department of Medicine and Translational Surgery, General Pathology Section, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
| | - Antonio Gasbarrini
- Department of Medicine and Translational Surgery, General Pathology Section, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
- Pancreas Unit, CEMAD Centro Malattie dell’Apparato Digerente, Medicina Interna e Gastroenterologia, Fondazione Policlinico Universitario Gemelli IRCCS, 00168 Roma, Italy
| | - Enrico Celestino Nista
- Department of Medicine and Translational Surgery, General Pathology Section, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
- Pancreas Unit, CEMAD Centro Malattie dell’Apparato Digerente, Medicina Interna e Gastroenterologia, Fondazione Policlinico Universitario Gemelli IRCCS, 00168 Roma, Italy
| | - Andrea Giaccari
- Endocrinology and Diabetology Unit, Fondazione Policlinico Universitario Gemelli IRCCS, 00168 Roma, Italy
- Department of Medicine and Translational Surgery, General Pathology Section, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
| | - Giovambattista Pani
- Department of Medicine and Translational Surgery, General Pathology Section, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
| | - Teresa Mezza
- Department of Medicine and Translational Surgery, General Pathology Section, Università Cattolica del Sacro Cuore, 00168 Roma, Italy
- Pancreas Unit, CEMAD Centro Malattie dell’Apparato Digerente, Medicina Interna e Gastroenterologia, Fondazione Policlinico Universitario Gemelli IRCCS, 00168 Roma, Italy
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3
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Rocha DS, Manucci AC, Bruni-Cardoso A, Kowaltowski AJ, Vilas-Boas EA. A practical and robust method to evaluate metabolic fluxes in primary pancreatic islets. Mol Metab 2024; 83:101922. [PMID: 38521184 PMCID: PMC11002748 DOI: 10.1016/j.molmet.2024.101922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 02/22/2024] [Accepted: 03/17/2024] [Indexed: 03/25/2024] Open
Abstract
OBJECTIVE Evaluation of mitochondrial oxygen consumption and ATP production is important to investigate pancreatic islet pathophysiology. Most studies use cell lines due to difficulties in measuring primary islet respiration, which requires specific equipment and consumables, is expensive and poorly reproducible. Our aim was to establish a practical method to assess primary islet metabolic fluxes using standard commercial consumables. METHODS Pancreatic islets were isolated from mice/rats, dispersed with trypsin, and adhered to pre-coated standard Seahorse or Resipher microplates. Oxygen consumption was evaluated using a Seahorse Extracellular Flux Analyzer or a Resipher Real-time Cell Analyzer. RESULTS We provide a detailed protocol with all steps to optimize islet isolation with high yield and functionality. Our method requires a few islets per replicate; both rat and mouse islets present robust basal respiration and proper response to mitochondrial modulators and glucose. The technique was validated by other functional assays, which show these cells present conserved calcium influx and insulin secretion in response to glucose. We also show that our dispersed islets maintain robust basal respiration levels, in addition to maintaining up to 89% viability after five days in dispersed cultures. Furthermore, OCRs can be measured in Seahorse analyzers and in other plate respirometry systems, using standard materials. CONCLUSIONS Overall, we established a practical and robust method to assess islet metabolic fluxes and oxidative phosphorylation, a valuable tool to uncover basic β-cell metabolic mechanisms as well as for translational investigations, such as pharmacological candidate discovery and islet transplantation protocols.
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Affiliation(s)
- Debora S Rocha
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, SP, Brazil
| | - Antonio C Manucci
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, SP, Brazil
| | | | - Alicia J Kowaltowski
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, SP, Brazil
| | - Eloisa A Vilas-Boas
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, SP, Brazil; Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, SP, Brazil.
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4
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Zhang X, Ge L, Jin G, Liu Y, Yu Q, Chen W, Chen L, Dong T, Miyagishima KJ, Shen J, Yang J, Lv G, Xu Y, Yang Q, Ye L, Yi S, Li H, Zhang Q, Chen G, Liu W, Yang Y, Li W, Ou J. Cold-induced FOXO1 nuclear transport aids cold survival and tissue storage. Nat Commun 2024; 15:2859. [PMID: 38570500 PMCID: PMC10991392 DOI: 10.1038/s41467-024-47095-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 03/19/2024] [Indexed: 04/05/2024] Open
Abstract
Cold-induced injuries severely limit opportunities and outcomes of hypothermic therapies and organ preservation, calling for better understanding of cold adaptation. Here, by surveying cold-altered chromatin accessibility and integrated CUT&Tag/RNA-seq analyses in human stem cells, we reveal forkhead box O1 (FOXO1) as a key transcription factor for autonomous cold adaptation. Accordingly, we find a nonconventional, temperature-sensitive FOXO1 transport mechanism involving the nuclear pore complex protein RANBP2, SUMO-modification of transporter proteins Importin-7 and Exportin-1, and a SUMO-interacting motif on FOXO1. Our conclusions are supported by cold survival experiments with human cell models and zebrafish larvae. Promoting FOXO1 nuclear entry by the Exportin-1 inhibitor KPT-330 enhances cold tolerance in pre-diabetic obese mice, and greatly prolongs the shelf-life of human and mouse pancreatic tissues and islets. Transplantation of mouse islets cold-stored for 14 days reestablishes normoglycemia in diabetic mice. Our findings uncover a regulatory network and potential therapeutic targets to boost spontaneous cold adaptation.
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Affiliation(s)
- Xiaomei Zhang
- Department of Hepatic Surgery and Liver transplantation Center of the Third Affiliated Hospital, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China
- Guangdong Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Department of Cancer Biology, Dana-Farber Cancer Institute; Department of Cell Biology, Harvard Medical School, Boston, MA, USA
| | - Lihao Ge
- Institute of Psychiatry and Neuroscience, Xinxiang Medical University, Xinxiang, China
| | - Guanghui Jin
- Department of Hepatic Surgery and Liver transplantation Center of the Third Affiliated Hospital, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China
- Guangdong Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yasong Liu
- Department of Hepatic Surgery and Liver transplantation Center of the Third Affiliated Hospital, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China
| | - Qingfen Yu
- Department of Neurology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Weizhao Chen
- Department of Hepatic Surgery and Liver transplantation Center of the Third Affiliated Hospital, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China
- Guangdong Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Liang Chen
- Department of Hepatic Surgery and Liver transplantation Center of the Third Affiliated Hospital, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China
- Guangdong Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Tao Dong
- Department of Hepatic Surgery and Liver transplantation Center of the Third Affiliated Hospital, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China
- Department of Surgery, University of Michigan, Ann Arbor, MI, USA
| | - Kiyoharu J Miyagishima
- Retinal Neurophysiology Section, National Eye Institute, National Institutes of Health, Bethesda, MD, USA
| | - Juan Shen
- Guangdong Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Guangdong province engineering laboratory for transplantation medicine, Guangzhou, China
| | - Jinghong Yang
- Department of Hepatic Surgery and Liver transplantation Center of the Third Affiliated Hospital, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China
- Guangdong Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Guo Lv
- Guangdong province engineering laboratory for transplantation medicine, Guangzhou, China
| | - Yan Xu
- Cell-gene Therapy Translational Medicine Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Qing Yang
- Department of Hepatic Surgery and Liver transplantation Center of the Third Affiliated Hospital, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China
| | - Linsen Ye
- Department of Hepatic Surgery and Liver transplantation Center of the Third Affiliated Hospital, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China
- Guangdong Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Shuhong Yi
- Department of Hepatic Surgery and Liver transplantation Center of the Third Affiliated Hospital, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China
| | - Hua Li
- Department of Hepatic Surgery and Liver transplantation Center of the Third Affiliated Hospital, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China
| | - Qi Zhang
- Guangdong Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Guangdong province engineering laboratory for transplantation medicine, Guangzhou, China
- Cell-gene Therapy Translational Medicine Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Guihua Chen
- Department of Hepatic Surgery and Liver transplantation Center of the Third Affiliated Hospital, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China
- Guangdong Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Guangdong province engineering laboratory for transplantation medicine, Guangzhou, China
| | - Wei Liu
- Guangdong Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.
- Guangdong province engineering laboratory for transplantation medicine, Guangzhou, China.
| | - Yang Yang
- Department of Hepatic Surgery and Liver transplantation Center of the Third Affiliated Hospital, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China.
- Guangdong Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.
- Guangdong province engineering laboratory for transplantation medicine, Guangzhou, China.
| | - Wei Li
- Retinal Neurophysiology Section, National Eye Institute, National Institutes of Health, Bethesda, MD, USA.
| | - Jingxing Ou
- Department of Hepatic Surgery and Liver transplantation Center of the Third Affiliated Hospital, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China.
- Guangdong Key Laboratory of Liver Disease Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.
- Guangdong province engineering laboratory for transplantation medicine, Guangzhou, China.
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5
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Costanzo A, Clarke D, Holt M, Sharma S, Nagy K, Tan X, Kain L, Abe B, Luce S, Boitard C, Wyseure T, Mosnier LO, Su AI, Grimes C, Finn MG, Savage PB, Gottschalk M, Pettus J, Teyton L. Repositioning the Early Pathology of Type 1 Diabetes to the Extraislet Vasculature. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2024; 212:1094-1104. [PMID: 38426888 PMCID: PMC10944819 DOI: 10.4049/jimmunol.2300769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 01/29/2024] [Indexed: 03/02/2024]
Abstract
Type 1 diabetes (T1D) is a prototypic T cell-mediated autoimmune disease. Because the islets of Langerhans are insulated from blood vessels by a double basement membrane and lack detectable lymphatic drainage, interactions between endocrine and circulating T cells are not permitted. Thus, we hypothesized that initiation and progression of anti-islet immunity required islet neolymphangiogenesis to allow T cell access to the islet. Combining microscopy and single cell approaches, the timing of this phenomenon in mice was situated between 5 and 8 wk of age when activated anti-insulin CD4 T cells became detectable in peripheral blood while peri-islet pathology developed. This "peri-insulitis," dominated by CD4 T cells, respected the islet basement membrane and was limited on the outside by lymphatic endothelial cells that gave it the attributes of a tertiary lymphoid structure. As in most tissues, lymphangiogenesis seemed to be secondary to local segmental endothelial inflammation at the collecting postcapillary venule. In addition to classic markers of inflammation such as CD29, V-CAM, and NOS, MHC class II molecules were expressed by nonhematopoietic cells in the same location both in mouse and human islets. This CD45- MHC class II+ cell population was capable of spontaneously presenting islet Ags to CD4 T cells. Altogether, these observations favor an alternative model for the initiation of T1D, outside of the islet, in which a vascular-associated cell appears to be an important MHC class II-expressing and -presenting cell.
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Affiliation(s)
- Anne Costanzo
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA
| | - Don Clarke
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA
| | - Marie Holt
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA
| | - Siddhartha Sharma
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA
| | - Kenna Nagy
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA
| | - Xuqian Tan
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA
| | - Lisa Kain
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA
| | - Brian Abe
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA
| | | | | | - Tine Wyseure
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA
| | - Laurent O. Mosnier
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA
| | - Andrew I. Su
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA
| | - Catherine Grimes
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE
| | - M. G. Finn
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA
| | - Paul B. Savage
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT
| | - Michael Gottschalk
- Rady Children’s Hospital, University of California San Diego, San Diego, CA
| | - Jeremy Pettus
- UC San Diego School of Medicine, University of California San Diego, San Diego, CA
| | - Luc Teyton
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA
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6
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Tedla MG, Wright N, Yolcu ES, Wang Y, Shirwan H. Protocol for transplanting pancreatic islets into the parametrial fat pad of female mice. STAR Protoc 2024; 5:102816. [PMID: 38180833 PMCID: PMC10801339 DOI: 10.1016/j.xpro.2023.102816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 11/13/2023] [Accepted: 12/18/2023] [Indexed: 01/07/2024] Open
Abstract
Although the male epididymal fat pad is an effective site for islet transplantation, females lack this tissue. Here, we present a protocol to assess the parametrial fat pad (PFP) adjacent to the uterine horn in females as an alternative site for islet transplantation. We describe steps for islet isolation from the pancreas, counting, transplantation into PFP, and monitoring for engraftment. Transplantation into PFP is minimally invasive, time efficient, and supports long-term engraftment of syngeneic islets and rejection of allogeneic islets. For complete details on the use and execution of this protocol, please refer to Zhang et al. (2022).1.
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Affiliation(s)
- Mebrahtu G Tedla
- Department of Pediatrics, Ellis Fischel Cancer Center, School of Medicine, University of Missouri, Columbia, MO 65211, USA; Department of Molecular Microbiology and Immunology, Ellis Fischel Cancer Center, School of Medicine, University of Missouri, Columbia, MO 65211, USA; NextGen Precision Health Institute, Ellis Fischel Cancer Center, School of Medicine, University of Missouri, Columbia, MO 65211, USA
| | - Nathaniel Wright
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Esma S Yolcu
- Department of Pediatrics, Ellis Fischel Cancer Center, School of Medicine, University of Missouri, Columbia, MO 65211, USA; Department of Molecular Microbiology and Immunology, Ellis Fischel Cancer Center, School of Medicine, University of Missouri, Columbia, MO 65211, USA; NextGen Precision Health Institute, Ellis Fischel Cancer Center, School of Medicine, University of Missouri, Columbia, MO 65211, USA
| | - Yadong Wang
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Haval Shirwan
- Department of Pediatrics, Ellis Fischel Cancer Center, School of Medicine, University of Missouri, Columbia, MO 65211, USA.
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7
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Zhao T, Tian Y, Zhao J, Sun D, Ma Y, Wang W, Yan W, Jiao P, Ma J. Loss of mitogen-activated protein kinase phosphate-5 aggravates islet dysfunction in mice with type 1 and type 2 diabetes. FASEB J 2024; 38:e23437. [PMID: 38305849 DOI: 10.1096/fj.202301479r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 12/14/2023] [Accepted: 01/08/2024] [Indexed: 02/03/2024]
Abstract
Impaired functionality and loss of islet β-cells are the primary abnormalities underlying the pathogenesis of both type 1 and 2 diabetes (T1DM and T2DM). However, specific therapeutic and preventive mechanisms underlying these conditions remain unclear. Mitogen-activated protein kinase phosphatase-5 (MKP-5) has been implicated in carcinogenesis, lipid metabolism regulation, and immune cell activation. In a previous study, we demonstrated the involvement of exogenous MKP-5 in the regulation of obesity-induced T2DM. However, the role of endogenous MKP-5 in the T1DM and T2DM processes is unclear. Thus, mice with MKP-5 knockout (KO) were generated and used to establish mouse models of both T1DM and T2DM. Our results showed that MKP-5 KO exacerbated diabetes-related symptoms in mice with both T1DM and T2DM. Given that most phenotypic studies on islet dysfunction have focused on mice with T2DM rather than T1DM, we specifically aimed to investigate the role of endoplasmic reticulum stress (ERS) and autophagy in T2DM KO islets. To accomplish this, we performed RNA sequence analysis to gain comprehensive insight into the molecular mechanisms associated with ERS and autophagy in T2DM KO islets. The results showed that the islets from mice with MKP-5 KO triggered 5' adenosine monophosphate-activated protein kinase (AMPK)-mediated autophagy inhibition and glucose-regulated protein 78 (GRP-78)-dominated ERS. Hence, we concluded that the autophagy impairment, resulting in islet dysfunction in mice with MKP-5 KO, is mediated through GRP-78 involvement. These findings provide valuable insights into the molecular pathogenesis of diabetes and highlight the significant role of MKP-5. Moreover, this knowledge holds promise for novel therapeutic strategies targeting MKP-5 for diabetes management.
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Affiliation(s)
- Tongjian Zhao
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, China
| | - Yafei Tian
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, China
| | - Jianan Zhao
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, China
| | - Dandan Sun
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, China
| | - Yongjun Ma
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, China
| | - Wei Wang
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, China
| | - Weiqun Yan
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, China
| | - Ping Jiao
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, China
| | - Jie Ma
- School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, China
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8
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Akai R, Hamashima H, Saito M, Kohno K, Iwawaki T. Partial limitation of cellular functions and compensatory modulation of unfolded protein response pathways caused by double-knockout of ATF6α and ATF6β. Cell Stress Chaperones 2024; 29:34-48. [PMID: 38320450 PMCID: PMC10939067 DOI: 10.1016/j.cstres.2023.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 11/15/2023] [Indexed: 02/08/2024] Open
Abstract
Mammalian cells have three types of endoplasmic reticulum (ER) stress-sensing molecules: ATF6, IRE1, and PERK. Among these, ATF6 is unique in that it is processed in an ER-stress-specific manner and functions as a transcription factor for the activation of anti-ER stress genes (such as BiP). ATF6 is known to have two homologues, ATF6α and ATF6β, and a greater understanding of their functions has been achieved through analyses using cultured cells. Physiological functions are also gradually being investigated in mice lacking ATF6α or ATF6β. However, little is known about the effects on mouse organisms of the deletion of both the ATF6α and ATF6β genes, since such double-knockout (DKO) mice suffer embryonic lethality at an early developmental stage. In this study, we generated and analyzed ATF6 DKO mice in which embryonic lethality was evaded by using Cre/loxP technology. Pancreatic β cell-specific ATF6 DKO mice were born normally and lived without dysregulation of blood-glucose levels but had a reduced tolerance to glucose. Islets isolated from ATF6 DKO mice also showed low production and secretion of insulin and mild enhancement of IRE1 and PERK activity. We further examined the developmental abnormalities of systemic ATF6 DKO mice. The phenotypes of ATF6α-/-; ATF6β-/- mice were similar to those previously reported, but ATF6α+/-; ATF6β-/- and ATF6α-/-; ATF6β+/- mice showed embryonic lethality at middle developmental stages, unlike those reported. Analysis of embryonic fibroblasts derived from these mice revealed that ATF6α and ATF6β have a gene-dose-dependent functional redundancy and display distinct differences in their ability to induce BiP expression. (250 words).
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Affiliation(s)
- Ryoko Akai
- Department of Life Science, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Kahoku, Ishikawa 920-0293, Japan
| | - Hisayo Hamashima
- Department of Life Science, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Kahoku, Ishikawa 920-0293, Japan
| | - Michiko Saito
- Bio-science Research Center, Kyoto Pharmaceutical University, 1, Misasagishichono-cho, Yamashina-ku, Kyoto 607-8412, Japan
| | - Kenji Kohno
- Department of Biochemistry and Molecular Biology, Graduate School of Science, University of Hyogo, Harima Science Garden City, Hyogo 678-1297, Japan; Institute for Research Initiatives, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Takao Iwawaki
- Department of Life Science, Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Kahoku, Ishikawa 920-0293, Japan.
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9
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Gao Y, Ryu H, Lee H, Kim YJ, Lee JH, Lee J. ER stress and unfolded protein response (UPR) signaling modulate GLP-1 receptor signaling in the pancreatic islets. Mol Cells 2024; 47:100004. [PMID: 38376482 PMCID: PMC10880082 DOI: 10.1016/j.mocell.2023.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 10/04/2023] [Accepted: 10/26/2023] [Indexed: 02/21/2024] Open
Abstract
Insulin is essential for maintaining normoglycemia and is predominantly secreted in response to glucose stimulation by β-cells. Incretin hormones, such as glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide, also stimulate insulin secretion. However, as obesity and type 2 diabetes worsen, glucose-dependent insulinotropic polypeptide loses its insulinotropic efficacy, whereas GLP-1 receptor (GLP-1R) agonists continue to be effective owing to its signaling switch from Gs to Gq. Herein, we demonstrated that endoplasmic reticulum (ER) stress induced a transition from Gs to Gq in GLP-1R signaling in mouse islets. Intriguingly, chemical chaperones known to alleviate ER stress, such as 4-PBA and TUDCA, enforced GLP-1R's Gq utilization rather than reversing GLP-1R's signaling switch induced by ER stress or obese and diabetic conditions. In addition, the activation of X-box binding protein 1 (XBP1) or activating transcription factor 6 (ATF6), 2 key ER stress-associated signaling (unfolded protein response) factors, promoted Gs utilization in GLP-1R signaling, whereas Gq employment by ER stress was unaffected by XBP1 or ATF6 activation. Our study revealed that ER stress and its associated signaling events alter GLP-1R's signaling, which can be used in type 2 diabetes treatment.
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Affiliation(s)
- Yurong Gao
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Hanguk Ryu
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Hyejin Lee
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Young-Joon Kim
- Department of Life Sciences, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Ji-Hye Lee
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Jaemin Lee
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
- New Biology Research Center, DGIST, Daegu 42988, Republic of Korea
- Well Aging Research Center, DGIST, Daegu 42988, Republic of Korea
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10
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Sun M, Wu Y, Yuan C, Lyu J, Zhao X, Ruan YC, Guo J, Chen H, Huang WQ. Androgen-induced upregulation of CFTR in pancreatic β-cell contributes to hyperinsulinemia in PCOS model. Endocrine 2024; 83:242-250. [PMID: 37922092 DOI: 10.1007/s12020-023-03516-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 08/30/2023] [Indexed: 11/05/2023]
Abstract
PURPOSE Polycystic ovarian syndrome (PCOS) is an endocrine-metabolic condition affecting 5-10% of reproductive-aged women and characterized by hyperandrogenism, insulin resistance (IR), and hyperinsulinemia. CFTR is known to be regulated by steroid hormones, and our previous study has demonstrated an essential role of CFTR in β-cell function. This study aims to investigate the contribution of androgen and CFTR to hypersecretion of insulin in PCOS and the underlying mechanism. METHODS We established a rat PCOS model by subcutaneously implanting silicon tubing containing Dihydrotestosterone (DHT). Glucose tolerance test with insulin levels was performed at 9 weeks after implantation. A rat β-cell line RINm5F, a mouse β-cell line β-TC-6, and mouse islets were treated with DHT, and with or without the androgen antagonist flutamide for CFTR and insulin secretion-related functional assays or mRNA/protein expression measurement. The effect of CFTR inhibitors on DHT-promoted membrane depolarization, glucose-stimulated intracellular Ca2+ oscillation and insulin secretion were examined by membrane potential imaging, calcium imaging and ELISA, respectively. RESULTS The DHT-induced PCOS model showed increased body weight, impaired glucose tolerance, and higher blood glucose and insulin levels after glucose stimulation. CFTR was upregulated in islets of PCOS model and DHT-treated cells, which was reversed by flutamide. The androgen receptor (AR) could bind to the CFTR promoter region, which was enhanced by DHT. Furthermore, DHT-induced membrane depolarization, enhanced glucose-stimulated Ca2+ oscillations and insulin secretion, which could be abolished by CFTR inhibitors. CONCLUSIONS Excessive androgen enhances glucose-stimulating insulin secretion through upregulation of CFTR, which may contribute to hyperinsulinemia in PCOS.
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Affiliation(s)
- Mengzhu Sun
- Department of Transfusion Medicine, Shenzhen Hospital, Southern Medical University, Shenzhen, Guangdong, China
| | - Yong Wu
- Department of Physiology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Chun Yuan
- State Key Laboratory of Reproductive Medicine, Clinical Centre of Reproductive Medicine, First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Jingya Lyu
- Department of Physiology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Xinyi Zhao
- Department of Physiology, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Ye Chun Ruan
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong, China
| | - Jinghui Guo
- School of Medicine, The Chinese University of Hong Kong, Shenzhen, 518172, Guangdong, China.
| | - Hui Chen
- Biotherapy Centre, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China.
- Cell-Gene Therapy Translational Medicine Research Centre, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China.
| | - Wen Qing Huang
- Department of Transfusion Medicine, Shenzhen Hospital, Southern Medical University, Shenzhen, Guangdong, China.
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11
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Hung YH, Kim Y, Mitchell SB, Thorn TL, Aydemir TB. Absence of Slc39a14/Zip14 in mouse pancreatic beta cells results in hyperinsulinemia. Am J Physiol Endocrinol Metab 2024; 326:E92-E105. [PMID: 38019082 PMCID: PMC11193513 DOI: 10.1152/ajpendo.00117.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 11/30/2023]
Abstract
Zinc is an essential component of the insulin protein complex synthesized in β cells. The intracellular compartmentalization and distribution of zinc are controlled by 24 transmembrane zinc transporters belonging to the ZnT or Zrt/Irt-like protein (ZIP) family. Downregulation of SLC39A14/ZIP14 has been reported in pancreatic islets of patients with type 2 diabetes (T2D) as well as mouse models of high-fat diet (HFD)- or db/db-induced obesity. Our previous studies observed mild hyperinsulinemia in mice with whole body knockout of Slc39a14 (Zip14 KO). Based on our current secondary data analysis from an integrative single-cell RNA-seq dataset of human whole pancreatic tissue, SLC39A14 (coding ZIP14) is the only other zinc transporter expressed abundantly in human β cells besides well-known zinc transporter SLC30A8 (coding ZnT8). In the present work, using pancreatic β cell-specific knockout of Slc39a14 (β-Zip14 KO), we investigated the role of SLC39A14/ZIP14-mediated intracellular zinc trafficking in glucose-stimulated insulin secretion and subsequent metabolic responses. Glucose-stimulated insulin secretion, zinc concentrations, and cellular localization of ZIP14 were assessed using in vivo, ex vivo, and in vitro assays using β-Zip14 KO, isolated islets, and murine cell line MIN6. Metabolic evaluations were done on both chow- and HFD-fed mice using time-domain nuclear magnetic resonance and a comprehensive laboratory animal monitoring system. ZIP14 localizes on the endoplasmic reticulum regulating intracellular zinc trafficking in β cells and serves as a negative regulator of glucose-stimulated insulin secretion. Deletion of Zip14 resulted in greater glucose-stimulated insulin secretion, increased energy expenditure, and shifted energy metabolism toward fatty acid utilization. HFD caused β-Zip14 KO mice to develop greater islet hyperplasia, compensatory hyperinsulinemia, and mild insulin resistance and hyperglycemia. This study provided new insights into the contribution of metal transporter ZIP14-mediated intracellular zinc trafficking in glucose-stimulated insulin secretion and subsequent metabolic responses.NEW & NOTEWORTHY Metal transporter SLC39A14/ZIP14 is downregulated in pancreatic islets of patients with T2D and mouse models of HFD- or db/db-induced obesity. However, the function of ZIP14-mediated intracellular zinc trafficking in β cells is unknown. Our analyses revealed that SLC39A14 is the only Zn transporter expressed abundantly in human β cells besides SLC30A8. Within the β cells, ZIP14 is localized on the endoplasmic reticulum and serves as a negative regulator of insulin secretion, providing a potential therapeutic target for T2D.
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Affiliation(s)
- Yu-Han Hung
- Division of Nutritional Sciences, Cornell University, Ithaca, New York, United States
- Department of College of Veterinary Medicine, Cornell University, Ithaca, New York, United States
| | - Yongeun Kim
- Division of Nutritional Sciences, Cornell University, Ithaca, New York, United States
| | - Samuel Blake Mitchell
- Division of Nutritional Sciences, Cornell University, Ithaca, New York, United States
| | - Trista Lee Thorn
- Division of Nutritional Sciences, Cornell University, Ithaca, New York, United States
| | - Tolunay Beker Aydemir
- Division of Nutritional Sciences, Cornell University, Ithaca, New York, United States
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12
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Wrublewsky S, Wilden C, Bickelmann C, Menger MD, Laschke MW, Ampofo E. Absent in Melanoma (AIM)2 Promotes the Outcome of Islet Transplantation by Repressing Ischemia-Induced Interferon (IFN) Signaling. Cells 2023; 13:16. [PMID: 38201220 PMCID: PMC10778091 DOI: 10.3390/cells13010016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/15/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024] Open
Abstract
Clinical islet transplantation is limited by ischemia-induced islet cell death. Recently, it has been reported that the absent in melanoma (AIM)2 inflammasome is upregulated by ischemic cell death due to recognition of aberrant cytoplasmic self-dsDNA. However, it is unknown whether AIM2 determines the outcome of islet transplantation. To investigate this, isolated wild type (WT) and AIM2-deficient (AIM2-/-) islets were exposed to oxygen-glucose deprivation to mimic ischemia, and their viability, endocrine function, and interferon (IFN) signaling were assessed. Moreover, the revascularization and endocrine function of grafted WT and AIM2-/- islets were analyzed in the mouse dorsal skinfold chamber model and the diabetic kidney capsule model. Ischemic WT and AIM2-/- islets did not differ in their viability. However, AIM2-/- islets exhibited a higher protein level of p202, a transcriptional regulator of IFN-β and IFN-γ gene expression. Accordingly, these cytokines were upregulated in AIM2-/- islets, resulting in a suppressed gene expression and secretion of insulin. Moreover, the revascularization of AIM2-/- islet grafts was deteriorated when compared to WT controls. Furthermore, transplantation of AIM2-/- islets in diabetic mice failed to restore physiological blood glucose levels. These findings indicate that AIM2 crucially determines the engraftment and endocrine function of transplanted islets by repressing IFN signaling.
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Affiliation(s)
| | | | | | | | | | - Emmanuel Ampofo
- Institute for Clinical & Experimental Surgery, Saarland University, 66421 Homburg, Germany; (S.W.)
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13
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Liskiewicz A, Khalil A, Liskiewicz D, Novikoff A, Grandl G, Maity-Kumar G, Gutgesell RM, Bakhti M, Bastidas-Ponce A, Czarnecki O, Makris K, Lickert H, Feuchtinger A, Tost M, Coupland C, Ständer L, Akindehin S, Prakash S, Abrar F, Castelino RL, He Y, Knerr PJ, Yang B, Hogendorf WFJ, Zhang S, Hofmann SM, Finan B, DiMarchi RD, Tschöp MH, Douros JD, Müller TD. Glucose-dependent insulinotropic polypeptide regulates body weight and food intake via GABAergic neurons in mice. Nat Metab 2023; 5:2075-2085. [PMID: 37946085 PMCID: PMC10730394 DOI: 10.1038/s42255-023-00931-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 10/13/2023] [Indexed: 11/12/2023]
Abstract
The development of single-molecule co-agonists for the glucagon-like peptide-1 (GLP-1) receptor (GLP-1R) and glucose-dependent insulinotropic polypeptide (GIP) receptor (GIPR) is considered a breakthrough in the treatment of obesity and type 2 diabetes. But although GIPR-GLP-1R co-agonism decreases body weight with superior efficacy relative to GLP-1R agonism alone in preclinical1-3 and clinical studies4,5, the role of GIP in regulating energy metabolism remains enigmatic. Increasing evidence suggests that long-acting GIPR agonists act in the brain to decrease body weight through the inhibition of food intake3,6-8; however, the mechanisms and neuronal populations through which GIP affects metabolism remain to be identified. Here, we report that long-acting GIPR agonists and GIPR-GLP-1R co-agonists decrease body weight and food intake via inhibitory GABAergic neurons. We show that acyl-GIP decreases body weight and food intake in male diet-induced obese wild-type mice, but not in mice with deletion of Gipr in Vgat(also known as Slc32a1)-expressing GABAergic neurons (Vgat-Gipr knockout). Whereas the GIPR-GLP-1R co-agonist MAR709 leads, in male diet-induced obese wild-type mice, to greater weight loss and further inhibition of food intake relative to a pharmacokinetically matched acyl-GLP-1 control, this superiority over GLP-1 vanishes in Vgat-Gipr knockout mice. Our data demonstrate that long-acting GIPR agonists crucially depend on GIPR signaling in inhibitory GABAergic neurons to decrease body weight and food intake.
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Affiliation(s)
- Arkadiusz Liskiewicz
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Munich, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Department of Physiology, Faculty of Medical Sciences in Katowice, Medical University of Silesia, Katowice, Poland
| | - Ahmed Khalil
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Munich, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Daniela Liskiewicz
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Munich, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Institute of Physiotherapy and Health Sciences, Academy of Physical Education, Katowice, Poland
| | - Aaron Novikoff
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Munich, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Gerald Grandl
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Munich, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Gandhari Maity-Kumar
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Munich, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Robert M Gutgesell
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Munich, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Mostafa Bakhti
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Zentrum München, Neuherberg, Germany
| | - Aimée Bastidas-Ponce
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Zentrum München, Neuherberg, Germany
| | - Oliver Czarnecki
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Zentrum München, Neuherberg, Germany
- TUM School of Medicine, Technical University of Munich, Munich, Germany
| | - Konstantinos Makris
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Munich, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Heiko Lickert
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Zentrum München, Neuherberg, Germany
- TUM School of Medicine, Technical University of Munich, Munich, Germany
| | - Annette Feuchtinger
- Core Facility Pathology & Tissue Analytics, Helmholtz Munich, Neuherberg, Germany
| | - Monica Tost
- Core Facility Pathology & Tissue Analytics, Helmholtz Munich, Neuherberg, Germany
| | - Callum Coupland
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Munich, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Lisa Ständer
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Munich, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Seun Akindehin
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Munich, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Sneha Prakash
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Munich, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Faiyaz Abrar
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Munich, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Russell L Castelino
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Munich, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Yantao He
- Novo Nordisk Research Center Indianapolis, Indianapolis, IN, USA
| | - Patrick J Knerr
- Novo Nordisk Research Center Indianapolis, Indianapolis, IN, USA
| | - Bin Yang
- Novo Nordisk Research Center Indianapolis, Indianapolis, IN, USA
| | | | - Shiqi Zhang
- Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Zentrum München, Neuherberg, Germany
| | - Susanna M Hofmann
- Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Zentrum München, Neuherberg, Germany
- Department of Medicine IV, University Hospital, LMU Munich, Munich, Germany
| | - Brian Finan
- Novo Nordisk Research Center Indianapolis, Indianapolis, IN, USA
| | | | - Matthias H Tschöp
- Helmholtz Munich, Neuherberg, Germany
- Division of Metabolic Diseases, Department of Medicine, Technical University of Munich, Munich, Germany
| | | | - Timo D Müller
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Munich, Neuherberg, Germany.
- German Center for Diabetes Research (DZD), Neuherberg, Germany.
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Luo C, Hou C, Yang D, Tan T, Chao C. Urolithin C alleviates pancreatic β-cell dysfunction in type 1 diabetes by activating Nrf2 signaling. Nutr Diabetes 2023; 13:24. [PMID: 38040681 PMCID: PMC10692094 DOI: 10.1038/s41387-023-00253-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 11/07/2023] [Accepted: 11/13/2023] [Indexed: 12/03/2023] Open
Abstract
AIMS Type 1 diabetes (T1D) is an autoimmune disorder that destroys insulin-generating pancreatic β-cells. Preserving pancreatic β-cell function is important for treating T1D. Our study aims to explore the mechanism underlying urolithin C (UC)-mediated regulation of β-cell function. METHODS Non-obese diabetic (NOD) mice were administrated with UC to evaluate UC-mediated protection of T1D. The inflammation of the pancreas islets was examined by hematoxylin and eosin staining. Glucose-stimulated insulin secretion (GSIS) assay and oral glucose tolerance test were applied to evaluate the progression of T1D. MIN6 cells were treated with TNF-α, IL-1β and IFN-γ in the presence of UC. Cell viability was analyzed by CCK-8. Cell apoptosis, proliferation and DNA fragmentation were examined by Annexin V-FITC and PI staining, EdU incorporation and comet assays. Keap1, Nrf2, HO-1 and NQO1 were examined by western blot. Immunofluorescence staining was applied to detect Nrf2 and insulin. RESULTS UC administration significantly reduced diabetes incidence, attenuated insulitis, elevated insulin levels and GSIS and reduced blood glucose and AUC in NOD mice. Cytokine treatment suppressed MIN6 cell viability and proliferation but enhanced apoptosis and DNA damage, and these detrimental effects were relieved by UC treatment. Furthermore, UC administration inhibited Keap1 expression and promoted the expression of Nrf2, HO-1 and NQO1 in NOD mice. Nrf2 signaling has been reported to be implicated in preventing the onset of diabetes, and HO-1 and NQO1 are phase II antioxidant enzymes that are regulated by Nrf2 signaling. Cytokine treatment upregulated Keap1 and downregulated Nrf2, HO-1 and NQO1 in MIN6 cells, but it was reversed by UC. The nuclear translocation of Nrf2 was prevented by cytokine treatment, but UC promoted its nuclear translocation. UC-mediated upregulation of Nrf2, HO-1 and NQO1, decreased cell apoptosis and increased proliferation and insulin secretion were abolished by silencing of Nrf2. CONCLUSION UC improves pancreatic β-cell function by activating Nrf2 signaling, thereby alleviating T1D progression.
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Affiliation(s)
- Cheng Luo
- Department of Cardiovascular Surgery, The Second Xiangya Hospital of Central South University, Changsha, 410011, Hunan Province, PR China
| | - Can Hou
- National Clinical Research Center for Metabolic Diseases, Key Laboratory of Diabetes Immunology, Ministry of Education, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha, 410011, Hunan Province, PR China
| | - Danyi Yang
- Department of Nephrology, The Second Xiangya Hospital of Central South University, Changsha, 410011, Hunan Province, PR China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, The Second Xiangya Hospital of Central South University, Changsha, 410011, Hunan Province, PR China
| | - Tingting Tan
- Department of Immunology, School of Basic Medical Sciences, Central South University, Changsha, 410008, Hunan Province, PR China
| | - Chen Chao
- National Clinical Research Center for Metabolic Diseases, Key Laboratory of Diabetes Immunology, Ministry of Education, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha, 410011, Hunan Province, PR China.
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15
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Ho KH, Gu G, Kaverina I. Preparation of Whole-mount Mouse Islets on Vascular Extracellular Matrix for Live Islet Cell Microscopy. Bio Protoc 2023; 13:e4868. [PMID: 37969764 PMCID: PMC10632159 DOI: 10.21769/bioprotoc.4868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 08/30/2023] [Accepted: 09/06/2023] [Indexed: 11/17/2023] Open
Abstract
Pancreatic islet β cells preferentially secrete insulin toward the plasma membrane, making contact with the capillary extracellular matrix (ECM). Isolated islets separated from the exocrine acinar cells are the best system for cell biology studies of primary β cells, whereas isolated islets lose their capillary network during ex vivo culture. Providing the appropriate extracellular signaling by attaching islets to vascular ECM-coated surfaces can restore the polarized insulin secretion toward the ECM. The guided secretion toward ECM-coated glass coverslips provides a good model for recording insulin secretion in real time to study its regulation. Additionally, β cells attached to the ECM-coated coverslips are suitable for confocal live imaging of subcellular components including adhesion molecules, cytoskeleton, and ion channels. This procedure is also compatible for total internal reflection fluorescence (TIRF) microscopy, which provides optimal signal-to-noise ratio and high spatial precision of structures close to the plasma membrane. In this article, we describe the optimized protocol for vascular ECM-coating of glass coverslips and the process of attachment of isolated mouse islets on the coverslip. This preparation is compatible with any high-resolution microscopy of live primary β cells. Key features • Optimized coating procedure to attach isolated islets, compatible for both confocal and TIRF microscopy. • The ECM-coated glass coverslip functions as the artificial capillary surface to guide secretion toward the coated surface for optimal imaging of secretion events. • Shows the process of islets attachment to the ECM-coated surface in a 6-day ex vivo culture.
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Affiliation(s)
- Kung-Hsien Ho
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
| | - Guoqiang Gu
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
- Program in Developmental Biology and Center for Stem Cell Biology, Vanderbilt University, Nashville, TN, USA
| | - Irina Kaverina
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
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16
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Liu SY, Cao SL, Luo HY, Bao L, E J, Li B, Lan XM, Zhang GQ, Bao X, Zheng YL. TFP5, a Peptide Derived from Cdk5 Activator p35, Protects Pancreatic β Cells from Glucose Toxicity. Bull Exp Biol Med 2023; 176:19-25. [PMID: 38087140 DOI: 10.1007/s10517-023-05959-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Indexed: 12/19/2023]
Abstract
We studied the effect of TFP5 on MIN6 cells (cultured mouse islet β cells) treated with different concentrations of glucose (5 or 25 mM). The results were verified in C57BL/6J mice (control; n=12) and db/db mice with type 2 diabetes mellitus (n=12). To synthesize TFP5, peptide p5 (a derivative of p35 protein, activator of cyclin-dependent kinase 5, Cdk5) was conjugated with a FITC tag at the N-terminus and an 11-amino acid TAT protein transduction domain at the C-terminus. TFP5 was employed to inhibit Cdk5 activity and then to evaluate its efficiency in treating experimental type 2 diabetes mellitus. TFP5 effectively inhibited the pathological hyperactivity of Cdk5, enhanced insulin secretion, and protected pancreatic β cells from apoptosis in vitro and in vivo. In addition, TFP5 inhibited inflammation in pancreatic islets by reducing the expression of inflammatory cytokines TGF-β1, TNFα, and IL-1β. These novel data indicates that TFP5 is a promising candidate for treatment of type 2 diabetes mellitus.
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Affiliation(s)
- S-Y Liu
- Department of Nephrology, People's Hospital of Ningxia Hui Autonomous Region, Ningxia Medical University, Yinchuan, China
- The Third Clinical Medical College of Ningxia Medical University, Yinchuan, China
| | - S-L Cao
- Department of Nephrology, People's Hospital of Ningxia Hui Autonomous Region, Ningxia Medical University, Yinchuan, China
- The Third Clinical Medical College of Ningxia Medical University, Yinchuan, China
| | - H-Y Luo
- Department of Nephrology, People's Hospital of Ningxia Hui Autonomous Region, Ningxia Medical University, Yinchuan, China
- The Third Clinical Medical College of Ningxia Medical University, Yinchuan, China
| | - L Bao
- Department of Nephrology, People's Hospital of Ningxia Hui Autonomous Region, Ningxia Medical University, Yinchuan, China
- The Third Clinical Medical College of Ningxia Medical University, Yinchuan, China
| | - J E
- Department of Nephrology, People's Hospital of Ningxia Hui Autonomous Region, Ningxia Medical University, Yinchuan, China
| | - B Li
- Department of Nephrology, People's Hospital of Ningxia Hui Autonomous Region, Ningxia Medical University, Yinchuan, China
| | - X-M Lan
- Department of Geriatrics, People's Hospital of Ningxia Hui Autonomous Region, Ningxia Medical University, Yinchuan, China
| | - G-Q Zhang
- Department of Nephrology, People's Hospital of Ningxia Hui Autonomous Region, Ningxia Medical University, Yinchuan, China
- The Third Clinical Medical College of Ningxia Medical University, Yinchuan, China
| | - X Bao
- Department of Nephrology, People's Hospital of Ningxia Hui Autonomous Region, Ningxia Medical University, Yinchuan, China
- The Third Clinical Medical College of Ningxia Medical University, Yinchuan, China
| | - Y-L Zheng
- Department of Nephrology, People's Hospital of Ningxia Hui Autonomous Region, Ningxia Medical University, Yinchuan, China.
- The Third Clinical Medical College of Ningxia Medical University, Yinchuan, China.
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17
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Hou X, Chen Y, Zhou B, Tang W, Ding Z, Chen L, Wu Y, Yang H, Du C, Yang D, Ma G, Cao H. Talin-1 inhibits Smurf1-mediated Stat3 degradation to modulate β-cell proliferation and mass in mice. Cell Death Dis 2023; 14:709. [PMID: 37903776 PMCID: PMC10616178 DOI: 10.1038/s41419-023-06235-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 10/09/2023] [Accepted: 10/19/2023] [Indexed: 11/01/2023]
Abstract
Insufficient pancreatic β-cell mass and reduced insulin expression are key events in the pathogenesis of diabetes mellitus (DM). Here we demonstrate the high expression of Talin-1 in β-cells and that deficiency of Talin-1 reduces β-cell proliferation, which leads to reduced β-cell mass and insulin expression, thus causing glucose intolerance without affecting peripheral insulin sensitivity in mice. High-fat diet fed exerbates these phenotypes. Mechanistically, Talin-1 interacts with the E3 ligase smad ubiquitination regulatory factor 1 (Smurf1), which prohibits ubiquitination of the signal transducer and activator of transcription 3 (Stat3) mediated by Smurf1, and ablation of Talin-1 enhances Smurf1-mediated ubiquitination of Stat3, leading to decreased β-cell proliferation and mass. Furthermore, haploinsufficiency of Talin-1 and Stat3 genes, but not that of either gene, in β-cell in mice significantly impairs glucose tolerance and insulin expression, indicating that both factors indeed function in the same genetic pathway. Finally, inducible deletion Talin-1 in β-cell causes glucose intolerance in adult mice. Collectively, our findings reveal that Talin-1 functions as a crucial regulator of β-cell mass, and highlight its potential as a therapeutic target for DM patients.
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Affiliation(s)
- Xiaoting Hou
- Department of Biochemistry, School of Medicine, Southern University of Science and Technology, Key University Laboratory of Metabolism and Health of Guangdong, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yangshan Chen
- Department of Biochemistry, School of Medicine, Southern University of Science and Technology, Key University Laboratory of Metabolism and Health of Guangdong, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Bo Zhou
- Department of Biochemistry, School of Medicine, Southern University of Science and Technology, Key University Laboratory of Metabolism and Health of Guangdong, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Wanze Tang
- Department of Biochemistry, School of Medicine, Southern University of Science and Technology, Key University Laboratory of Metabolism and Health of Guangdong, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Southern University of Science and Technology, Shenzhen, 518055, China
- The First Affiliated Hospital, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Zhen Ding
- Department of Biochemistry, School of Medicine, Southern University of Science and Technology, Key University Laboratory of Metabolism and Health of Guangdong, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Litong Chen
- Department of Biochemistry, School of Medicine, Southern University of Science and Technology, Key University Laboratory of Metabolism and Health of Guangdong, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yun Wu
- Department of Oral and Maxillofacial Surgery, Stomatological Center, Peking University Shenzhen Hospital; Guangdong Provincial High-level Clinical Key Specialty; Guangdong Province Engineering Research Center of Oral Disease Diagnosis and Treatment; The Institute of Stomatology, Peking University Shenzhen Hospital, Shenzhen Peking University; The Hong Kong University of Science and Technology Medical Center, Guangdong, China
| | - Hongyu Yang
- Department of Oral and Maxillofacial Surgery, Stomatological Center, Peking University Shenzhen Hospital; Guangdong Provincial High-level Clinical Key Specialty; Guangdong Province Engineering Research Center of Oral Disease Diagnosis and Treatment; The Institute of Stomatology, Peking University Shenzhen Hospital, Shenzhen Peking University; The Hong Kong University of Science and Technology Medical Center, Guangdong, China
| | - Changzheng Du
- Department of Biochemistry, School of Medicine, Southern University of Science and Technology, Key University Laboratory of Metabolism and Health of Guangdong, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Dazhi Yang
- The First Affiliated Hospital, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Guixing Ma
- Department of Biochemistry, School of Medicine, Southern University of Science and Technology, Key University Laboratory of Metabolism and Health of Guangdong, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Southern University of Science and Technology, Shenzhen, 518055, China.
| | - Huiling Cao
- Department of Biochemistry, School of Medicine, Southern University of Science and Technology, Key University Laboratory of Metabolism and Health of Guangdong, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Southern University of Science and Technology, Shenzhen, 518055, China.
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18
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Cristelo C, Nunes R, Pinto S, Marques JM, Gama FM, Sarmento B. Targeting β Cells with Cathelicidin Nanomedicines Improves Insulin Function and Pancreas Regeneration in Type 1 Diabetic Rats. ACS Pharmacol Transl Sci 2023; 6:1544-1560. [PMID: 37854630 PMCID: PMC10580391 DOI: 10.1021/acsptsci.3c00218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Indexed: 10/20/2023]
Abstract
Type 1 diabetes (T1D) is an incurable condition with an increasing incidence worldwide, in which the hallmark is the autoimmune destruction of pancreatic insulin-producing β cells. Cathelicidin-based peptides have been shown to improve β cell function and neogenesis and may thus be relevant while developing T1D therapeutics. In this work, a cathelicidin-derived peptide, LLKKK18, was loaded in poly(lactic-co-glycolic acid) (PLGA) nanoparticles (NPs), surface-functionalized with exenatide toward a GLP-1 receptor, aiming the β cell-targeted delivery of the peptide. The NPs present a mean size of around 100 nm and showed long-term stability, narrow size distribution, and negative ζ-potential (-10 mV). The LLKKK18 association efficiency and loading were 62 and 2.9%, respectively, presenting slow and sustained in vitro release under simulated physiologic fluids. Glucose-stimulated insulin release in the INS-1E cell line was observed in the presence of the peptide. In addition, NPs showed a strong association with β cells from isolated rat islets. After administration to diabetic rats, NPs induced a significant reduction of the hyperglycemic state, an improvement in the pancreatic insulin content, and glucose tolerance. Also remarkable, a considerable increase in the β cell mass in the pancreas was observed. Overall, this novel and versatile nanomedicine showed glucoregulatory ability and can pave the way for the development of a new generation of therapeutic approaches for T1D treatment.
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Affiliation(s)
- Cecília Cristelo
- i3S
− Instituto de Investigação e Inovação
em Saúde, Universidade do Porto, Porto 4200-135, Portugal
- Centro
de Engenharia Biológica, Universidade
do Minho, Campus de Gualtar, Braga 4710-057, Portugal
- ICBAS
− Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto 4050-313, Portugal
| | - Rute Nunes
- i3S
− Instituto de Investigação e Inovação
em Saúde, Universidade do Porto, Porto 4200-135, Portugal
- IUCS-CESPU, Instituto
Universitário de Ciências
da Saúde, Gandra 4585-116, Portugal
| | - Soraia Pinto
- i3S
− Instituto de Investigação e Inovação
em Saúde, Universidade do Porto, Porto 4200-135, Portugal
- ICBAS
− Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto 4050-313, Portugal
| | - Joana Moreira Marques
- i3S
− Instituto de Investigação e Inovação
em Saúde, Universidade do Porto, Porto 4200-135, Portugal
- Faculdade
de Farmácia, Universidade do Porto, Porto 4099-002, Portugal
| | - Francisco Miguel Gama
- Centro
de Engenharia Biológica, Universidade
do Minho, Campus de Gualtar, Braga 4710-057, Portugal
| | - Bruno Sarmento
- i3S
− Instituto de Investigação e Inovação
em Saúde, Universidade do Porto, Porto 4200-135, Portugal
- IUCS-CESPU, Instituto
Universitário de Ciências
da Saúde, Gandra 4585-116, Portugal
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19
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Hrovatin K, Bastidas-Ponce A, Bakhti M, Zappia L, Büttner M, Salinno C, Sterr M, Böttcher A, Migliorini A, Lickert H, Theis FJ. Delineating mouse β-cell identity during lifetime and in diabetes with a single cell atlas. Nat Metab 2023; 5:1615-1637. [PMID: 37697055 PMCID: PMC10513934 DOI: 10.1038/s42255-023-00876-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 07/26/2023] [Indexed: 09/13/2023]
Abstract
Although multiple pancreatic islet single-cell RNA-sequencing (scRNA-seq) datasets have been generated, a consensus on pancreatic cell states in development, homeostasis and diabetes as well as the value of preclinical animal models is missing. Here, we present an scRNA-seq cross-condition mouse islet atlas (MIA), a curated resource for interactive exploration and computational querying. We integrate over 300,000 cells from nine scRNA-seq datasets consisting of 56 samples, varying in age, sex and diabetes models, including an autoimmune type 1 diabetes model (NOD), a glucotoxicity/lipotoxicity type 2 diabetes model (db/db) and a chemical streptozotocin β-cell ablation model. The β-cell landscape of MIA reveals new cell states during disease progression and cross-publication differences between previously suggested marker genes. We show that β-cells in the streptozotocin model transcriptionally correlate with those in human type 2 diabetes and mouse db/db models, but are less similar to human type 1 diabetes and mouse NOD β-cells. We also report pathways that are shared between β-cells in immature, aged and diabetes models. MIA enables a comprehensive analysis of β-cell responses to different stressors, providing a roadmap for the understanding of β-cell plasticity, compensation and demise.
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Affiliation(s)
- Karin Hrovatin
- Institute of Computational Biology, Helmholtz Zentrum München, Neuherberg, Germany
- TUM School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Aimée Bastidas-Ponce
- Institute of Diabetes and Regeneration Research, Helmholtz Zentrum München, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Medical Faculty, Technical University of Munich, Munich, Germany
| | - Mostafa Bakhti
- Institute of Diabetes and Regeneration Research, Helmholtz Zentrum München, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Luke Zappia
- Institute of Computational Biology, Helmholtz Zentrum München, Neuherberg, Germany
- Department of Mathematics, Technical University of Munich, Garching, Germany
| | - Maren Büttner
- Institute of Computational Biology, Helmholtz Zentrum München, Neuherberg, Germany
- Genomics and Immunoregulation, Life & Medical Sciences (LIMES) Institute, University of Bonn, Bonn, Germany
- Systems Medicine, Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), Bonn, Germany
| | - Ciro Salinno
- Institute of Diabetes and Regeneration Research, Helmholtz Zentrum München, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Medical Faculty, Technical University of Munich, Munich, Germany
| | - Michael Sterr
- Institute of Diabetes and Regeneration Research, Helmholtz Zentrum München, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Anika Böttcher
- Institute of Diabetes and Regeneration Research, Helmholtz Zentrum München, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Adriana Migliorini
- Institute of Diabetes and Regeneration Research, Helmholtz Zentrum München, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- McEwen Stem Cell Institute, University Health Network (UHN), Toronto, Ontario, Canada
| | - Heiko Lickert
- Institute of Diabetes and Regeneration Research, Helmholtz Zentrum München, Neuherberg, Germany.
- German Center for Diabetes Research (DZD), Neuherberg, Germany.
- Medical Faculty, Technical University of Munich, Munich, Germany.
| | - Fabian J Theis
- Institute of Computational Biology, Helmholtz Zentrum München, Neuherberg, Germany.
- TUM School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany.
- Department of Mathematics, Technical University of Munich, Garching, Germany.
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20
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Montalvo AP, Gruskin ZL, Leduc A, Liu M, Gao Z, Ahn JH, Straubhaar JR, Slavov N, Alvarez-Dominguez JR. An adult clock component links circadian rhythms to pancreatic β-cell maturation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.11.552890. [PMID: 37609178 PMCID: PMC10441398 DOI: 10.1101/2023.08.11.552890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
How ubiquitous circadian clocks orchestrate tissue-specific outputs is not well understood. Pancreatic β cell-autonomous clocks attune insulin secretion to daily energy cycles, and desynchrony from genetic or behavioral disruptions raises type 2 diabetes risk. We show that the transcription factor DEC1, a clock component induced in adult β cells, coordinates their glucose responsiveness by synchronizing energy metabolism and secretory gene oscillations. Dec1-ablated mice develop lifelong hypo-insulinemic diabetes, despite normal islet formation and intact circadian Clock and Bmal1 activators. DEC1, but not CLOCK/BMAL1, binds maturity-linked genes that mediate respiratory metabolism and insulin exocytosis, and Dec1 loss disrupts their transcription synchrony. Accordingly, β-cell Dec1 ablation causes hypo-insulinemia due to immature glucose responsiveness, dampening insulin rhythms. Thus, Dec1 links circadian clockwork to the β-cell maturation process, aligning metabolism to diurnal energy cycles.
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Affiliation(s)
- Ana P Montalvo
- Department of Neurosurgery, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Zoe L Gruskin
- Department of Cell and Developmental Biology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
- Institute for Regenerative Medicine and Institute for Diabetes, Obesity and Metabolism, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Andrew Leduc
- Departments of Bioengineering and Biology, Single-Cell Proteomics Center and Barnett Institute, Northeastern University, Boston, MA 02115, USA
| | - Mai Liu
- Institute for Regenerative Medicine and Institute for Diabetes, Obesity and Metabolism, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
- Department of Bioengineering, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Zihan Gao
- Institute for Regenerative Medicine and Institute for Diabetes, Obesity and Metabolism, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
- Department of Bioengineering, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - June H Ahn
- Institute for Regenerative Medicine and Institute for Diabetes, Obesity and Metabolism, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Juerg R Straubhaar
- Bioinformatics Center, Massachusetts Eye and Ear Infirmary, Boston, MA 02114, USA
| | - Nikolai Slavov
- Departments of Bioengineering and Biology, Single-Cell Proteomics Center and Barnett Institute, Northeastern University, Boston, MA 02115, USA
| | - Juan R Alvarez-Dominguez
- Department of Cell and Developmental Biology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
- Institute for Regenerative Medicine and Institute for Diabetes, Obesity and Metabolism, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
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21
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Voznesenskaya A, Berggren PO, Ilegems E. Sustained heterologous gene expression in pancreatic islet organoids using adeno-associated virus serotype 8. Front Bioeng Biotechnol 2023; 11:1147244. [PMID: 37545890 PMCID: PMC10400289 DOI: 10.3389/fbioe.2023.1147244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 07/06/2023] [Indexed: 08/08/2023] Open
Abstract
Genetic modification of pancreatic islet organoids, assembled in vitro prior to transplantation is an emerging alternative to direct in vivo genetic manipulations for a number of clinical and research applications. We have previously shown that dispersion of islet cells followed by re-aggregation into islet organoids, or pseudoislets, allows for efficient transduction with viral vectors, while maintaining physiological functions of native islets. Among viruses currently used for genetic manipulations, adeno-associated viruses (AAVs) have the most attractive safety profile making them suitable for gene therapy applications. Studies reporting on pseudoislet transduction with AAVs are, however, lacking. Here, we have characterized in detail the performance of AAV serotype 8 in transduction of islet cells during pseudoislet formation in comparison with human adenovirus type 5 (AdV5). We have assessed such parameters as transduction efficiency, expression kinetics, and endocrine cell tropism of AAV8 alone or in combination with AdV5. Data provided within our study may serve as a reference point for future functional studies using AAVs for gene transfer to islet cell organoids and will facilitate further development of engineered pseudoislets of superior quality suitable for clinical transplantation.
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22
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Kucharczyk P, Albano G, Deisl C, Ho TM, Bargagli M, Anderegg M, Wueest S, Konrad D, Fuster DG. Thiazides Attenuate Insulin Secretion Through Inhibition of Mitochondrial Carbonic Anhydrase 5b in β -Islet Cells in Mice. J Am Soc Nephrol 2023; 34:1179-1190. [PMID: 36927842 PMCID: PMC10356162 DOI: 10.1681/asn.0000000000000122] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 02/26/2023] [Indexed: 03/18/2023] Open
Abstract
SIGNIFICANCE STATEMENT Thiazide diuretics (thiazides) are among the most widely prescribed drugs worldwide, but their use is associated with glucose intolerance and new-onset diabetes mellitus. The molecular mechanisms remain elusive. Our study reveals that thiazides attenuate insulin secretion through inhibition of the mitochondrial carbonic anhydrase isoform 5b (CA5b) in pancreatic β cells. We furthermore discovered that pancreatic β cells express only one functional carbonic anhydrase isoform, CA5b, which is critical in replenishing oxaloacetate in the mitochondrial tricarboxylic acid (TCA) cycle (anaplerosis). These findings explain the mechanism for thiazide-induced glucose intolerance and reveal a fundamental role of CA5b in TCA cycle anaplerosis and insulin secretion in β cells. BACKGROUND Thiazide diuretics are associated with glucose intolerance and new-onset diabetes mellitus. Previous studies demonstrated that thiazides attenuate insulin secretion, but the molecular mechanisms remain elusive. We hypothesized that thiazides attenuate insulin secretion via one of the known molecular thiazide targets in β cells. METHODS We performed static insulin secretion experiments with islets of wild-type, Sodium/chloride co-transporter (NCC) (SLC12A3), and sodium-driven chloride/bicarbonate exchanger (NDCBE) (SLC4A8) knock-out (KO) mice and with murine Min6 cells with individual knockdown of carbonic anhydrase (CA) isoforms to identify the molecular target of thiazides in β cells. CA isoform 5b (CA5b) KO mice were then used to assess the role of the putative thiazide target CA5b in β -cell function and in mediating thiazide sensitivity in vitro and in vivo . RESULTS Thiazides inhibited glucose- and sulfonylurea-stimulated insulin secretion in islets and Min6 cells at pharmacologically relevant concentrations. Inhibition of insulin secretion by thiazides was CO 2 /HCO 3- -dependent, not additive to unselective CA inhibition with acetazolamide, and independent of extracellular potassium. By contrast, insulin secretion was unaltered in islets of mice lacking the known molecular thiazide targets NCC or NDCBE. CA expression profiling with subsequent knockdown of individual CA isoforms suggested mitochondrial CA5b as a molecular target. In support of these findings, thiazides significantly attenuated Krebs cycle anaplerosis through reduction of mitochondrial oxaloacetate synthesis. CA5b KO mice were resistant to thiazide-induced glucose intolerance, and thiazides did not alter insulin secretion in CA5b KO islets. CONCLUSIONS Thiazides attenuate insulin secretion via inhibition of the mitochondrial CA5b isoform in β cells of mice.
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Affiliation(s)
- Patrycja Kucharczyk
- Department of Nephrology and Hypertension, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- National Centre of Competence in Research (NCCR) TransCure, University of Bern, Bern, Switzerland
- Department for BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Giuseppe Albano
- Department of Nephrology and Hypertension, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- National Centre of Competence in Research (NCCR) TransCure, University of Bern, Bern, Switzerland
- Department for BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Christine Deisl
- Department of Nephrology and Hypertension, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- National Centre of Competence in Research (NCCR) TransCure, University of Bern, Bern, Switzerland
- Department for BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Tin Manh Ho
- Department of Nephrology and Hypertension, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- National Centre of Competence in Research (NCCR) TransCure, University of Bern, Bern, Switzerland
- Department for BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Matteo Bargagli
- Department of Nephrology and Hypertension, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- National Centre of Competence in Research (NCCR) TransCure, University of Bern, Bern, Switzerland
- Department for BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Manuel Anderegg
- Department of Nephrology and Hypertension, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- National Centre of Competence in Research (NCCR) TransCure, University of Bern, Bern, Switzerland
- Department for BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Stephan Wueest
- Division of Pediatric Endocrinology and Diabetology, University Children's Hospital, University of Zürich, Zürich, Switzerland
- Children's Research Center, University Children's Hospital, University of Zürich, Zürich, Switzerland
| | - Daniel Konrad
- Division of Pediatric Endocrinology and Diabetology, University Children's Hospital, University of Zürich, Zürich, Switzerland
- Children's Research Center, University Children's Hospital, University of Zürich, Zürich, Switzerland
| | - Daniel G. Fuster
- Department of Nephrology and Hypertension, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- National Centre of Competence in Research (NCCR) TransCure, University of Bern, Bern, Switzerland
- Department for BioMedical Research (DBMR), University of Bern, Bern, Switzerland
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23
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Liu S, Li B, Ma D, Tao Y, Song J, Bao L, Zhang G, Luo H, Cao S, E J, Zheng Y. TFP5 attenuates cyclin-dependent kinase 5-mediated islet β-cell damage in diabetes. Chem Biol Drug Des 2023; 102:76-87. [PMID: 37005089 DOI: 10.1111/cbdd.14235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 02/20/2023] [Accepted: 03/13/2023] [Indexed: 04/04/2023]
Abstract
Islet β-cell damage and dysfunction represent the pathophysiological basis of diabetes. Excessive activation of cyclin-dependent kinase 5 (CDK5) is involved in the pathogenesis of type 2 diabetes mellitus (T2DM), although the exact mechanism remains unclear. Therefore, this study investigated the role of a CDK5 inhibitor (TFP5) in islet β-cell damage under diabetic conditions by regulating the expression of CDK5 in vitro and in vivo. CDK5 was upregulated under high glucose conditions in vivo and in vitro, which resulted in inflammation, oxidative stress, and apoptosis of islet β-cells, thereby decreasing insulin secretion. However, TFP5 treatment inhibited the overexpression of CDK5; reduced the inflammatory response, oxidative stress, and apoptosis of islet β cells; and restored insulin secretion. In conclusion, CDK5 is involved in islet β-cell damage under high glucose conditions, and TFP5 may represent a promising candidate for the development of treatments for T2DM.
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Affiliation(s)
- Shunyao Liu
- Department of Nephrology, Ningxia Medical University Affiliated People's Hospital of Autonomous Region, Yinchuan, China
- School of Clinical Medicine, Ningxia Medical University, Yinchuan, China
| | - Bo Li
- Department of Nephrology, Ningxia Medical University Affiliated People's Hospital of Autonomous Region, Yinchuan, China
- Dialysis Department of Nephrology Hospital, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Danna Ma
- Department of Nephrology, Ningxia Medical University Affiliated People's Hospital of Autonomous Region, Yinchuan, China
- Department of Nephrology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yuejia Tao
- School of Basic Medicine, Ningxia Medical University, Yinchuan, China
| | - Jiang Song
- School of Clinical Medicine, Ningxia Medical University, Yinchuan, China
| | - Li Bao
- Department of Nephrology, Ningxia Medical University Affiliated People's Hospital of Autonomous Region, Yinchuan, China
| | - Guoqing Zhang
- Department of Nephrology, Ningxia Medical University Affiliated People's Hospital of Autonomous Region, Yinchuan, China
- School of Clinical Medicine, Ningxia Medical University, Yinchuan, China
| | - Hongyan Luo
- Department of Nephrology, Ningxia Medical University Affiliated People's Hospital of Autonomous Region, Yinchuan, China
- School of Clinical Medicine, Ningxia Medical University, Yinchuan, China
| | - Shilu Cao
- Department of Nephrology, Ningxia Medical University Affiliated People's Hospital of Autonomous Region, Yinchuan, China
- School of Clinical Medicine, Ningxia Medical University, Yinchuan, China
| | - Jing E
- Department of Nephrology, Ningxia Medical University Affiliated People's Hospital of Autonomous Region, Yinchuan, China
- Department of Nephrology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yali Zheng
- Department of Nephrology, Ningxia Medical University Affiliated People's Hospital of Autonomous Region, Yinchuan, China
- School of Clinical Medicine, Ningxia Medical University, Yinchuan, China
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24
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Spezani R, Marinho TS, Macedo Cardoso LE, Aguila MB, Mandarim-de-Lacerda CA. Pancreatic islet remodeling in cotadutide-treated obese mice. Life Sci 2023; 327:121858. [PMID: 37315839 DOI: 10.1016/j.lfs.2023.121858] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/06/2023] [Accepted: 06/09/2023] [Indexed: 06/16/2023]
Abstract
Obesity and type 2 diabetes mellitus (T2DM) cause morphofunctional alterations in pancreatic islet alpha and beta cells. Therefore, we hypothesize that the new GLP-1/Glucagon receptor dual agonist cotadutide may benefit islet cell arrangement and function. Twelve-week-old C57BL/6 male mice were fed a control diet (C, 10 % kJ fat) or a high-fat diet (HF, 50 % kJ fat) for ten weeks. Then, the animals were divided into four groups for an additional 30 days and daily treated with subcutaneous cotadutide (30 nmol/kg) or vehicle: C, CC (control+cotadutide), HF, and HFC (high-fat+cotadutide). Cotadutide led to weight loss and reduced insulin resistance in the HFC group, increasing insulin receptor substrate 1 and solute carrier family 2 gene expressions in isolated islets. Also, cotadutide enhanced transcriptional factors related to islet cell transdifferentiation, decreasing aristaless-related homeobox and increasing the paired box 4 and 6, pancreatic and duodenal homeobox 1, v-maf musculoaponeurotic fibrosarcoma oncogene family protein A, neurogenin 3, and neurogenic differentiation 1. In addition, cotadutide improved the proliferating cell nuclear antigen, NK6 homeobox 1, B cell leukemia/lymphoma 2, but lessening caspase 3. Furthermore, cotadutide mitigated the endoplasmic reticulum (ER) stress-responsive genes, reducing transcription factor 4, DNA-damage-inducible transcript 3, and growth arrest and DNA-damage-inducible 45. In conclusion, our data demonstrated significant beneficial actions of cotadutide in DIO mice, such as weight loss, glycemic control, and insulin resistance improvement. In addition, cotadutide counteracted the pathological adaptive cellular arrangement of the pancreatic islet in obese mice, improving the markers of the transdifferentiating pathway, proliferation, apoptosis, and ER stress.
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Affiliation(s)
- Renata Spezani
- Laboratory of Morphometry, Metabolism, and Cardiovascular Disease, Biomedical Center, Institute of Biology, The University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Thatiany Souza Marinho
- Laboratory of Morphometry, Metabolism, and Cardiovascular Disease, Biomedical Center, Institute of Biology, The University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Luiz E Macedo Cardoso
- Laboratory of Morphometry, Metabolism, and Cardiovascular Disease, Biomedical Center, Institute of Biology, The University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcia Barbosa Aguila
- Laboratory of Morphometry, Metabolism, and Cardiovascular Disease, Biomedical Center, Institute of Biology, The University of the State of Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Carlos Alberto Mandarim-de-Lacerda
- Laboratory of Morphometry, Metabolism, and Cardiovascular Disease, Biomedical Center, Institute of Biology, The University of the State of Rio de Janeiro, Rio de Janeiro, Brazil.
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25
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Ishii T, Miyasato Y, Ichijo M, Uchimura K, Furuya F. Membrane protease prostasin promotes insulin secretion by regulating the epidermal growth factor receptor pathway. Sci Rep 2023; 13:9086. [PMID: 37277555 DOI: 10.1038/s41598-023-36326-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 06/01/2023] [Indexed: 06/07/2023] Open
Abstract
Prostasin (PRSS8) is a serine protease that metabolizes and moderates the effect of specific substrates. Epidermal growth factor receptor (EGFR), which modulates insulin secretion and pancreatic β-cell proliferation, is regulated via proteolytic shedding by PRSS8. We first detected PRSS8 expression in β-cells of pancreatic islets of mice. To better understand the molecular processes involved in PRSS8-associated insulin secretion, pancreatic β-cell-specific PRSS8 knockout (βKO) and PRSS8-overexpressing (βTG) male mice were generated. We found that glucose intolerance and reduction in glucose-stimulated insulin secretion developed in βKO mice compared with the control subjects. A higher response to glucose was noted in islets retrieved from βTG mice. Erlotinib, a specific blocker of EGFR, blocks EGF- and glucose-stimulated secretion of insulin among MIN6 cells, and glucose improves EGF release from β-cells. After silencing PRSS8 in MIN6 cells, glucose-stimulated insulin secretion decreased, and EGFR signaling was impaired. Conversely, overexpression of PRSS8 in MIN6 cells induced higher concentrations of both basal and glucose-stimulated insulin secretion and increased phospho-EGFR concentrations. Furthermore, short-term exposure to glucose improved the concentration of endogenous PRSS8 in MIN6 cells through inhibition of intracellular degradation. These findings suggest that PRSS8 is involved in glucose-dependent physiological regulation of insulin secretion via the EGF-EGFR signaling pathway in pancreatic β-cells.
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Grants
- 17K16145 Japan Society for the Promotion of Science, KAKENHI
- 19K17958 Japan Society for the Promotion of Science, KAKENHI
- 21K16367 Japan Society for the Promotion of Science, KAKENHI
- 17K16145 Japan Society for the Promotion of Science, KAKENHI
- 19K17958 Japan Society for the Promotion of Science, KAKENHI
- 21K16367 Japan Society for the Promotion of Science, KAKENHI
- 17K16145 Japan Society for the Promotion of Science, KAKENHI
- 19K17958 Japan Society for the Promotion of Science, KAKENHI
- 21K16367 Japan Society for the Promotion of Science, KAKENHI
- 17K16145 Japan Society for the Promotion of Science, KAKENHI
- 19K17958 Japan Society for the Promotion of Science, KAKENHI
- 21K16367 Japan Society for the Promotion of Science, KAKENHI
- 17K16145 Japan Society for the Promotion of Science, KAKENHI
- 19K17958 Japan Society for the Promotion of Science, KAKENHI
- 21K16367 Japan Society for the Promotion of Science, KAKENHI
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Affiliation(s)
- Toshihisa Ishii
- Division of Nephrology, University of Yamanashi, Yamanashi, 409-3898, Japan
| | - Yoshikazu Miyasato
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, 860-8556, Japan
| | - Masashi Ichijo
- Department of Diabetes and Endocrinology, Matsumoto National Hospital, Matsumoto, Japan
| | - Kohei Uchimura
- Division of Nephrology, University of Yamanashi, Yamanashi, 409-3898, Japan.
| | - Fumihiko Furuya
- Division of Nephrology, University of Yamanashi, Yamanashi, 409-3898, Japan
- Department of Thyroid and Endocrinology, Fukushima Medical University, Fukushima, Japan
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26
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He S, Yu X, Cui D, Liu Y, Yang S, Zhang H, Hu W, Su Z. Nuclear factor-Y mediates pancreatic β-cell compensation by repressing reactive oxygen species-induced apoptosis under metabolic stress. Chin Med J (Engl) 2023; 136:922-932. [PMID: 37000974 PMCID: PMC10278746 DOI: 10.1097/cm9.0000000000002645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Indexed: 04/03/2023] Open
Abstract
BACKGROUND Pancreatic β-cells elevate insulin production and secretion through a compensatory mechanism to override insulin resistance under metabolic stress conditions. Deficits in β-cell compensatory capacity result in hyperglycemia and type 2 diabetes (T2D). However, the mechanism in the regulation of β-cell compensative capacity remains elusive. Nuclear factor-Y (NF-Y) is critical for pancreatic islets' homeostasis under physiological conditions, but its role in β-cell compensatory response to insulin resistance in obesity is unclear. METHODS In this study, using obese ( ob/ob ) mice with an absence of NF-Y subunit A (NF-YA) in β-cells ( ob , Nf-ya βKO) as well as rat insulinoma cell line (INS1)-based models, we determined whether NF-Y-mediated apoptosis makes an essential contribution to β-cell compensation upon metabolic stress. RESULTS Obese animals had markedly augmented NF-Y expression in pancreatic islets. Deletion of β-cell Nf-ya in obese mice worsened glucose intolerance and resulted in β-cell dysfunction, which was attributable to augmented β-cell apoptosis and reactive oxygen species (ROS). Furthermore, primary pancreatic islets from Nf-ya βKO mice were sensitive to palmitate-induced β-cell apoptosis due to mitochondrial impairment and the attenuated antioxidant response, which resulted in the aggravation of phosphorylated c-Jun N-terminal kinase (JNK) and cleaved caspase-3. These detrimental effects were completely relieved by ROS scavenger. Ultimately, forced overexpression of NF-Y in INS1 β-cell line could rescue palmitate-induced β-cell apoptosis, dysfunction, and mitochondrial impairment. CONCLUSION Pancreatic NF-Y might be an essential regulator of β-cell compensation under metabolic stress.
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Affiliation(s)
- Siyuan He
- Molecular Medicine Research Center and National Clinical Research Center for Geriatrics, West China Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, Sichuan 610041, China
| | - Xiaoqian Yu
- Clinical Translational Innovation Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Daxin Cui
- Molecular Medicine Research Center and National Clinical Research Center for Geriatrics, West China Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yin Liu
- Molecular Medicine Research Center and National Clinical Research Center for Geriatrics, West China Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, Sichuan 610041, China
| | - Shanshan Yang
- Molecular Medicine Research Center and National Clinical Research Center for Geriatrics, West China Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, Sichuan 610041, China
| | - Hongmei Zhang
- Molecular Medicine Research Center and National Clinical Research Center for Geriatrics, West China Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, Sichuan 610041, China
| | - Wanxin Hu
- Molecular Medicine Research Center and National Clinical Research Center for Geriatrics, West China Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, Sichuan 610041, China
| | - Zhiguang Su
- Molecular Medicine Research Center and National Clinical Research Center for Geriatrics, West China Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, Sichuan 610041, China
- Clinical Translational Innovation Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
- Division of Endocrinology and Metabolism, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
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27
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Cardoso LEM, Marinho TS, Martins FF, Aguila MB, Mandarim-de-Lacerda CA. Treatment with semaglutide, a GLP-1 receptor agonist, improves extracellular matrix remodeling in the pancreatic islet of diet-induced obese mice. Life Sci 2023; 319:121502. [PMID: 36796719 DOI: 10.1016/j.lfs.2023.121502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 02/02/2023] [Accepted: 02/10/2023] [Indexed: 02/16/2023]
Abstract
AIMS The extracellular matrix (ECM) is fundamental for the normal endocrine functions of pancreatic islet cells and plays key roles in the pathophysiology of type 2 diabetes. Here we investigated the turnover of islet ECM components, including islet amyloid polypeptide (IAPP), in an obese mouse model treated with semaglutide, a glucagon-like peptide type 1 receptor agonist. MAIN METHODS Male one-month-old C57BL/6 mice were fed a control diet (C) or a high-fat diet (HF) for 16 weeks, then treated with semaglutide (subcutaneous 40 μg/kg every three days) for an additional four weeks (HFS). The islets were immunostained and gene expressions were assessed. KEY FINDINGS Comparisons refer to HFS vs HF. Thus, IAPP immunolabeling and beta-cell-enriched beta-amyloid precursor protein cleaving enzyme (Bace2, -40 %) and heparanase immunolabeling and gene (Hpse, -40 %) were mitigated by semaglutide. In contrast, perlecan (Hspg2, +900 %) and vascular endothelial growth factor A (Vegfa, +420 %) were enhanced by semaglutide. Also, semaglutide lessened syndecan 4 (Sdc4, -65 %) and hyaluronan synthases (Has1, -45 %; Has2, -65 %) as well as chondroitin sulfate immunolabeling, and collagen type 1 (Col1a1, -60 %) and type 6 (Col6a3, -15 %), lysyl oxidase (Lox, -30 %) and metalloproteinases (Mmp2, -45 %; Mmp9, -60 %). SIGNIFICANCE Semaglutide improved the turnover of islet heparan sulfate proteoglycans, hyaluronan, chondroitin sulfate proteoglycans, and collagens in the islet ECM. Such changes should contribute to restoring a healthy islet functional milieu and should reduce the formation of cell-damaging amyloid deposits. Our findings also provide additional evidence for the involvement of islet proteoglycans in the pathophysiology of type 2 diabetes.
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Affiliation(s)
- Luiz E M Cardoso
- Laboratory of Morphometry, Metabolism, and Cardiovascular disease, Biomedical Center, Institute of Biology, The University of the State of Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Thatiany Souza Marinho
- Laboratory of Morphometry, Metabolism, and Cardiovascular disease, Biomedical Center, Institute of Biology, The University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fabiane Ferreira Martins
- Laboratory of Morphometry, Metabolism, and Cardiovascular disease, Biomedical Center, Institute of Biology, The University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcia Barbosa Aguila
- Laboratory of Morphometry, Metabolism, and Cardiovascular disease, Biomedical Center, Institute of Biology, The University of the State of Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Carlos A Mandarim-de-Lacerda
- Laboratory of Morphometry, Metabolism, and Cardiovascular disease, Biomedical Center, Institute of Biology, The University of the State of Rio de Janeiro, Rio de Janeiro, Brazil.
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28
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Hu X, Gattis C, Olroyd AG, Friera AM, White K, Young C, Basco R, Lamba M, Wells F, Ankala R, Dowdle WE, Lin A, Egenberger K, Rukstalis JM, Millman JR, Connolly AJ, Deuse T, Schrepfer S. Human hypoimmune primary pancreatic islets avoid rejection and autoimmunity and alleviate diabetes in allogeneic humanized mice. Sci Transl Med 2023; 15:eadg5794. [PMID: 37043559 DOI: 10.1126/scitranslmed.adg5794] [Citation(s) in RCA: 25] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Transplantation of allogeneic pancreatic donor islets has successfully been performed in selected patients with difficult-to-control insulin-dependent diabetes and impaired awareness of hypoglycemia (IAH). However, the required systemic immunosuppression associated with this procedure prevents this cell replacement therapy from more widespread adoption in larger patient populations. We report the editing of primary human islet cells to the hypoimmune HLA class I- and class II-negative and CD47-overexpressing phenotype and their reaggregation into human HIP pseudoislets (p-islets). Human HIP p-islets were shown to survive, engraft, and ameliorate diabetes in immunocompetent, allogeneic, diabetic humanized mice. HIP p-islet cells were further shown to avoid autoimmune killing in autologous, diabetic humanized autoimmune mice. The survival and endocrine function of HIP p-islet cells were not impaired by contamination of unedited or partially edited cells within the p-islets. HIP p-islet cells were eliminated quickly and reliably in this model using a CD47-targeting antibody, thus providing a safety strategy in case HIP cells exert toxicity in a future clinical setting. Transplantation of human HIP p-islets for which no immunosuppression is required has the potential to lead to wider adoption of this therapy and help more diabetes patients with IAH and history of severe hypoglycemic events to achieve insulin independence.
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Affiliation(s)
- Xiaomeng Hu
- Sana Biotechnology Inc., 1 Tower Place, South San Francisco, CA 94080, USA
| | - Corie Gattis
- Sana Biotechnology Inc., 1 Tower Place, South San Francisco, CA 94080, USA
| | - Ari G Olroyd
- Sana Biotechnology Inc., 1 Tower Place, South San Francisco, CA 94080, USA
| | - Annabelle M Friera
- Sana Biotechnology Inc., 1 Tower Place, South San Francisco, CA 94080, USA
| | - Kathy White
- Sana Biotechnology Inc., 1 Tower Place, South San Francisco, CA 94080, USA
| | - Chi Young
- Sana Biotechnology Inc., 1 Tower Place, South San Francisco, CA 94080, USA
| | - Ron Basco
- Sana Biotechnology Inc., 1 Tower Place, South San Francisco, CA 94080, USA
| | - Meghan Lamba
- Sana Biotechnology Inc., 1 Tower Place, South San Francisco, CA 94080, USA
| | - Frank Wells
- Sana Biotechnology Inc., 1 Tower Place, South San Francisco, CA 94080, USA
| | - Ramya Ankala
- Sana Biotechnology Inc., 1 Tower Place, South San Francisco, CA 94080, USA
| | - William E Dowdle
- Sana Biotechnology Inc., 1 Tower Place, South San Francisco, CA 94080, USA
| | - August Lin
- Sana Biotechnology Inc., 1 Tower Place, South San Francisco, CA 94080, USA
| | - Kyla Egenberger
- Sana Biotechnology Inc., 1 Tower Place, South San Francisco, CA 94080, USA
| | | | - Jeffrey R Millman
- Sana Biotechnology Inc., 1 Tower Place, South San Francisco, CA 94080, USA
| | - Andrew J Connolly
- Department of Pathology, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Tobias Deuse
- Department of Surgery, Division of Cardiothoracic Surgery, Transplant and Stem Cell Immunobiology (TSI) Lab, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Sonja Schrepfer
- Sana Biotechnology Inc., 1 Tower Place, South San Francisco, CA 94080, USA
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29
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Ho KH, Jayathilake A, Yagan M, Nour A, Osipovich AB, Magnuson MA, Gu G, Kaverina I. CAMSAP2 localizes to the Golgi in islet β-cells and facilitates Golgi-ER trafficking. iScience 2023; 26:105938. [PMID: 36718359 PMCID: PMC9883185 DOI: 10.1016/j.isci.2023.105938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 12/07/2022] [Accepted: 01/04/2023] [Indexed: 01/09/2023] Open
Abstract
Glucose stimulation induces the remodeling of microtubules, which potentiates insulin secretion in pancreatic β-cells. CAMSAP2 binds to microtubule minus ends to stabilize microtubules in several cultured clonal cells. Here, we report that the knockdown of CAMSAP2 in primary β-cells reduces total insulin content and attenuates GSIS without affecting the releasability of insulin vesicles. Surprisingly, CAMSAP2 knockdown does not change microtubule stability. Unlike in cultured insulinoma cells, CAMSAP2 in primary β-cells predominantly localizes to the Golgi apparatus instead of microtubule minus ends. This novel localization is specific to primary β- but not α-cells and is independent of microtubule binding. Consistent with its specific localization at the Golgi, CAMSAP2 promotes efficient Golgi-ER trafficking in primary β-cells. Moreover, primary β-cells and insulinoma cells likely express different CAMSAP2 isoforms. We propose that a novel CAMSAP2 isoform in primary β-cells has a non-canonical function, which promotes Golgi-ER trafficking to support efficient production of insulin and secretion.
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Affiliation(s)
- Kung-Hsien Ho
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
| | - Anissa Jayathilake
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
| | - Mahircan Yagan
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
| | - Aisha Nour
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
| | - Anna B. Osipovich
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA
| | - Mark A. Magnuson
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA
| | - Guoqiang Gu
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
| | - Irina Kaverina
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN, USA
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30
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Pucelik B, Barzowska A, Czarna A. DYRK1A inhibitors leucettines and TGF-β inhibitor additively stimulate insulin production in beta cells, organoids, and isolated mouse islets. PLoS One 2023; 18:e0285208. [PMID: 37195917 DOI: 10.1371/journal.pone.0285208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 04/18/2023] [Indexed: 05/19/2023] Open
Abstract
The decreased β-cell mass and impaired β-cell functionality are the primary causes of diabetes mellitus (DM). Nevertheless, the underlying molecular mechanisms by which β-cell growth and function are controlled are not fully understood. In this work, we show that leucettines, known to be DYRK1A kinase inhibitors, can improve glucose-stimulated insulin secretion (GSIS) in rodent β-cells and isolated islets, as well as in hiPSC-derived β-cells islets. We confirm that DYRK1A is expressed in murine insulinoma cells MIN6. In addition, we found that treatment with selected leucettines stimulates proliferation of β-cells and promotes MIN6 cell cycle progression to the G2/M phase. This effect is also confirmed by increased levels of cyclin D1, which is highly responsive to proliferative signals. Among other leucettines, leucettine L43 had a negligible impact on β-cell proliferation, but markedly impair GSIS. However, leucettine L41, in combination with LY364947, a, a potent and selective TGF-β type-I receptor, significantly promotes GSIS in various cellular diabetic models, including MIN6 and INS1E cells in 2D and 3D culture, iPSC-derived β-cell islets derived from iPSC, and isolated mouse islets, by increased insulin secretion and decreased glucagon level. Our findings confirm an important role of DYRK1A inhibitors as modulators of β-cells function and suggested a new potential target for antidiabetic therapy. Moreover, we show in detail that leucettine derivatives represent promising antidiabetic agents and are worth further evaluation, especially in vivo.
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Affiliation(s)
- Barbara Pucelik
- Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa, Krakow, Poland
| | - Agata Barzowska
- Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa, Krakow, Poland
- Doctoral School of Exact and Natural Sciences, Jagiellonian University, Krakow, Poland
| | - Anna Czarna
- Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa, Krakow, Poland
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31
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Asadi F, Dhanvantari S. Misrouting of glucagon and stathmin-2 towards lysosomal system of α-cells in glucagon hypersecretion of diabetes. Islets 2022; 14:40-57. [PMID: 34923907 PMCID: PMC8726656 DOI: 10.1080/19382014.2021.2011550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Glucagon hypersecretion from the pancreatic α-cell is a characteristic sign of diabetes, which exacerbates fasting hyperglycemia. Thus, targeting glucagon secretion from α-cells may be a promising approach for combating hyperglucagonemia. We have recently identified stathmin-2 as an α-cell protein that regulates glucagon secretion by directing glucagon toward the endolysosomal system in αTC1-6 cells. We hypothesized that disruption of Stmn2-mediated trafficking of glucagon to the endolysosomes in diabetes contributes to hyperglucagonemia. In isolated islets from male mice treated with streptozotocin (STZ), glucagon secretion and cellular content were augmented, but cellular Stmn2 levels were reduced (p < .01), as measured by both ELISA and immunofluorescence intensity. Using confocal immunofluorescence microscopy, the colocalization of glucagon and Stmn2 in Lamp2A+ lysosomes was dramatically reduced (p < .001) in islets from diabetic mice, and the colocalization of Stmn2, but not glucagon, with the late endosome marker, Rab7, significantly (p < .01) increased. Further studies were conducted in αTC1-6 cells cultured in media containing high glucose (16.7 mM) for 2 weeks to mimic glucagon hypersecretion of diabetes. Surprisingly, treatment of αTC1-6 cells with the lysosomal inhibitor bafilomycin A1 reduced K+-induced glucagon secretion, suggesting that high glucose may induce glucagon secretion from another lysosomal compartment. Both glucagon and Stmn2 co-localized with Lamp1, which marks secretory lysosomes, in cells cultured in high glucose. We propose that, in addition to enhanced trafficking and secretion through the regulated secretory pathway, the hyperglucagonemia of diabetes may also be due to re-routing of glucagon from the degradative Lamp2A+ lysosome toward the secretory Lamp1+ lysosome.
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Affiliation(s)
- Farzad Asadi
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine & Dentistry, Western University, London, ON, Canada
| | - Savita Dhanvantari
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine & Dentistry, Western University, London, ON, Canada
- Department of Medical Biophysics, Western University, London, ON, Canada
- Metabolism & Diabetes and Imaging Programs, Lawson Health Research Institute, London, ON, Canada
- CONTACT Savita Dhanvantari Lawson Health Research Institute, PO Box 5777, Stn B, London, ONN6A 4V2, Canada
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32
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Crewe C, Chen S, Bu D, Gliniak CM, Wernstedt Asterholm I, Yu XX, Joffin N, de Souza CO, Funcke JB, Oh DY, Varlamov O, Robino JJ, Gordillo R, Scherer PE. Deficient Caveolin-1 Synthesis in Adipocytes Stimulates Systemic Insulin-Independent Glucose Uptake via Extracellular Vesicles. Diabetes 2022; 71:2496-2512. [PMID: 35880782 PMCID: PMC9750943 DOI: 10.2337/db22-0035] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 07/20/2022] [Indexed: 01/11/2023]
Abstract
Caveolin-1 (cav1) is an important structural and signaling component of plasma membrane invaginations called caveolae and is abundant in adipocytes. As previously reported, adipocyte-specific ablation of the cav1 gene (ad-cav1 knockout [KO] mouse) does not result in elimination of the protein, as cav1 protein traffics to adipocytes from neighboring endothelial cells. However, this mouse is a functional KO because adipocyte caveolar structures are depleted. Compared with controls, ad-cav1KO mice on a high-fat diet (HFD) display improved whole-body glucose clearance despite complete loss of glucose-stimulated insulin secretion, blunted insulin-stimulated AKT activation in metabolic tissues, and partial lipodystrophy. The cause is increased insulin-independent glucose uptake by white adipose tissue (AT) and reduced hepatic gluconeogenesis. Furthermore, HFD-fed ad-cav1KO mice display significant AT inflammation, fibrosis, mitochondrial dysfunction, and dysregulated lipid metabolism. The glucose clearance phenotype of the ad-cav1KO mice is at least partially mediated by AT small extracellular vesicles (AT-sEVs). Injection of control mice with AT-sEVs from ad-cav1KO mice phenocopies ad-cav1KO characteristics. Interestingly, AT-sEVs from ad-cav1KO mice propagate the phenotype of the AT to the liver. These data indicate that ad-cav1 is essential for healthy adaptation of the AT to overnutrition and prevents aberrant propagation of negative phenotypes to other organs by EVs.
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Affiliation(s)
- Clair Crewe
- Touchstone Diabetes Center, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, MO
- Division of Endocrinology, Metabolism and Lipid Research, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO
| | - Shiuhwei Chen
- Touchstone Diabetes Center, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX
| | - Dawei Bu
- Touchstone Diabetes Center, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX
| | - Christy M. Gliniak
- Touchstone Diabetes Center, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX
| | - Ingrid Wernstedt Asterholm
- Department of Physiology (Metabolic Physiology Research Unit), Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Xin Xin Yu
- Touchstone Diabetes Center, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX
| | - Nolwenn Joffin
- Touchstone Diabetes Center, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX
| | - Camila O. de Souza
- Touchstone Diabetes Center, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX
| | - Jan-Bernd Funcke
- Touchstone Diabetes Center, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX
| | - Da Young Oh
- Touchstone Diabetes Center, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX
| | - Oleg Varlamov
- Division of Cardiometabolic Health, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR
| | - Jacob J. Robino
- Division of Cardiometabolic Health, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR
| | - Ruth Gordillo
- Touchstone Diabetes Center, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX
| | - Philipp E. Scherer
- Touchstone Diabetes Center, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX
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Madsen CT, Refsgaard JC, Teufel FG, Kjærulff SK, Wang Z, Meng G, Jessen C, Heljo P, Jiang Q, Zhao X, Wu B, Zhou X, Tang Y, Jeppesen JF, Kelstrup CD, Buckley ST, Tullin S, Nygaard-Jensen J, Chen X, Zhang F, Olsen JV, Han D, Grønborg M, de Lichtenberg U. Combining mass spectrometry and machine learning to discover bioactive peptides. Nat Commun 2022; 13:6235. [PMID: 36266275 PMCID: PMC9584923 DOI: 10.1038/s41467-022-34031-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 10/10/2022] [Indexed: 12/25/2022] Open
Abstract
Peptides play important roles in regulating biological processes and form the basis of a multiplicity of therapeutic drugs. To date, only about 300 peptides in human have confirmed bioactivity, although tens of thousands have been reported in the literature. The majority of these are inactive degradation products of endogenous proteins and peptides, presenting a needle-in-a-haystack problem of identifying the most promising candidate peptides from large-scale peptidomics experiments to test for bioactivity. To address this challenge, we conducted a comprehensive analysis of the mammalian peptidome across seven tissues in four different mouse strains and used the data to train a machine learning model that predicts hundreds of peptide candidates based on patterns in the mass spectrometry data. We provide in silico validation examples and experimental confirmation of bioactivity for two peptides, demonstrating the utility of this resource for discovering lead peptides for further characterization and therapeutic development.
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Affiliation(s)
| | - Jan C Refsgaard
- Global Research Technologies, Novo Nordisk A/S, Maaloev, Denmark
- Intomics, Kongens Lyngby, Denmark
| | - Felix G Teufel
- Global Research Technologies, Novo Nordisk A/S, Maaloev, Denmark
| | - Sonny K Kjærulff
- Global Research Technologies, Novo Nordisk A/S, Maaloev, Denmark
- Intomics, Kongens Lyngby, Denmark
| | - Zhe Wang
- Novo Nordisk Research Centre China, Beijing, China
| | - Guangjun Meng
- Novo Nordisk Research Centre China, Beijing, China
- Pulmongene LTD. Rm 502, Building 2, No. 9, Yike Road, Zhongguancun Life Science Park, Changping District, Beijing, China
| | - Carsten Jessen
- Global Research Technologies, Novo Nordisk A/S, Maaloev, Denmark
| | - Petteri Heljo
- Global Research Technologies, Novo Nordisk A/S, Maaloev, Denmark
| | - Qunfeng Jiang
- Novo Nordisk Research Centre China, Beijing, China
- Innovent Biologics, Inc. DongPing Jie 168, Suzhou, China
| | - Xin Zhao
- Novo Nordisk Research Centre China, Beijing, China
| | - Bo Wu
- Novo Nordisk Research Centre China, Beijing, China
- QL Biopharmaceutical, Rm 101, Building 7, 20 Life Science Park Road, Beijing, China
| | - Xueping Zhou
- Novo Nordisk Research Centre China, Beijing, China
- Crinetics pharmaceuticals, 10222 Barnes Canyon Rd Building 2, San Diego, CA, 92121, USA
| | - Yang Tang
- Novo Nordisk Research Centre China, Beijing, China
- Roche R&D Center (China) Ltd, Building 5, 371 Lishizhen Road, 201203, Pudong, Shanghai, China
| | - Jacob F Jeppesen
- Global Research Technologies, Novo Nordisk A/S, Maaloev, Denmark
| | | | | | - Søren Tullin
- Global Research Technologies, Novo Nordisk A/S, Maaloev, Denmark
- Boehringer Ingelheim GmbH & Co. KG, Birkendorfer Str. 65, 88397, Biberach, Germany
| | - Jan Nygaard-Jensen
- Global Research Technologies, Novo Nordisk A/S, Maaloev, Denmark
- Boehringer Ingelheim GmbH & Co. KG, Birkendorfer Str. 65, 88397, Biberach, Germany
| | - Xiaoli Chen
- Novo Nordisk Research Centre China, Beijing, China
| | - Fang Zhang
- Novo Nordisk Research Centre China, Beijing, China
- Structure Therapeutics. 701 Gateway Blvd., South San Francisco, CA, 94080, USA
| | - Jesper V Olsen
- Department of Proteomics, The Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Copenhagen, Denmark
| | - Dan Han
- Novo Nordisk Research Centre China, Beijing, China
| | - Mads Grønborg
- Global Research Technologies, Novo Nordisk A/S, Maaloev, Denmark
| | - Ulrik de Lichtenberg
- Global Research Technologies, Novo Nordisk A/S, Maaloev, Denmark
- The Novo Nordisk Foundation, Tuborg Havnevej 19, 2900, Hellerup, Denmark
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Singh G, Senapati S, Satpathi S, Behera PK, Das B, Nayak B. Establishment of decellularized extracellular matrix scaffold derived from caprine pancreas as a novel alternative template over porcine pancreatic scaffold for prospective biomedical application. FASEB J 2022; 36:e22574. [PMID: 36165227 DOI: 10.1096/fj.202200807r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 08/25/2022] [Accepted: 09/16/2022] [Indexed: 11/11/2022]
Abstract
In this study, the caprine pancreas has been presented as an alternative to the porcine organ for pancreatic xenotransplantation with lesser risk factors. The obtained caprine pancreas underwent a systematic cycle of detergent perfusion for decellularization. It was perfused using anionic (0.5% w/v sodium dodecyl sulfate) as well as non-ionic (0.1% v/v triton X-100, t-octyl phenoxy polyethoxy ethanol) detergents and washed intermittently with 1XPBS supplemented with 0.1% v/v antibiotic and nucleases in a gravitation-driven set-up. After 48 h, a white decellularized pancreas was obtained, and its extracellular matrix (ECM) content was examined for scaffold-like properties. The ECM content was assessed for removal of cellular content, and nuclear material was evaluated with temporal H&E staining. Quantified DNA was found to be present in a negligible amount in the resultant decellularized pancreas tissue (DPT), thus prohibiting it from triggering any immunogenicity. Collagen and fibronectin were confirmed to be preserved upon trichrome and immunohistochemical staining, respectively. SEM and AFM images reveal interconnected collagen fibril networks in the DPT, confirming that collagen was unaffected. sGAG was visualized using Prussian blue staining and quantified with DMMB assay, where DPT has effectively retained this ECM component. Uniaxial tensile analysis revealed that DPT possesses better elasticity than NPT (native pancreatic tissue). Physical parameters like tensile strength, stiffness, biodegradation, and swelling index were retained in the DPT with negligible loss. The cytocompatibility analysis of DPT has shown no cytotoxic effect for up to 72 h on normal insulin-producing cells (MIN-6) and cancerous glioblastoma (LN229) cells in vitro. The scaffold was recellularized using isolated mouse islets, which have established in vitro cell proliferation for up to 9 days. The scaffold received at the end of the decellularization cycle was found to be non-toxic to the cells, retained biological and physical properties of the native ECM, suitable for recellularization, and can be used as a safer and better alternative as a transplantable organ from a xenogeneic source.
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Affiliation(s)
- Garima Singh
- Immunology and Molecular Medicine Laboratory, Department of Life Science, National Institute of Technology, Rourkela, India
| | - Shantibhusan Senapati
- Tumor Microenvironment and Animal Models Laboratory, Institute of Life Sciences, Bhubaneswar, India
| | | | | | - Biswajit Das
- Tumor Microenvironment and Animal Models Laboratory, Institute of Life Sciences, Bhubaneswar, India
| | - Bismita Nayak
- Immunology and Molecular Medicine Laboratory, Department of Life Science, National Institute of Technology, Rourkela, India
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Habibe JJ, Clemente-Olivo MP, Scheithauer TPM, Rampanelli E, Herrema H, Vos M, Mieremet A, Nieuwdorp M, van Raalte DH, Eringa EC, de Vries CJM. Glucose-mediated insulin secretion is improved in FHL2-deficient mice and elevated FHL2 expression in humans is associated with type 2 diabetes. Diabetologia 2022; 65:1721-1733. [PMID: 35802167 PMCID: PMC9477948 DOI: 10.1007/s00125-022-05750-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 05/09/2022] [Indexed: 02/05/2023]
Abstract
AIMS/HYPOTHESIS The general population is ageing, involving an enhanced incidence of chronic diseases such as type 2 diabetes. With ageing, DNA methylation of FHL2 increases, as well as expression of the four and a half LIM domains 2 (FHL2) protein in human pancreatic islets. We hypothesised that FHL2 is actively involved in glucose metabolism. METHODS Publicly available microarray datasets from human pancreatic islets were analysed for FHL2 expression. In FHL2-deficient mice, we studied glucose clearance and insulin secretion. Gene expression analysis and glucose-stimulated insulin secretion (GSIS) were determined in isolated murine FHL2-deficient islets to evaluate insulin-secretory capacity. Moreover, knockdown and overexpression of FHL2 were accomplished in MIN6 cells to delineate the underlying mechanism of FHL2 function. RESULTS Transcriptomics of human pancreatic islets revealed that individuals with elevated levels of HbA1c displayed increased FHL2 expression, which correlated negatively with insulin secretion pathways. In line with this observation, FHL2-deficient mice cleared glucose more efficiently than wild-type littermates through increased plasma insulin levels. Insulin sensitivity was comparable between these genotypes. Interestingly, pancreatic islets isolated from FHL2-deficient mice secreted more insulin in GSIS assays than wild-type mouse islets even though insulin content and islet size was similar. To support this observation, we demonstrated increased expression of the transcription factor crucial in insulin secretion, MAF BZIP transcription factor A (MafA), higher expression of GLUT2 and reduced expression of the adverse factor c-Jun in FHL2-deficient islets. The underlying mechanism of FHL2 was further delineated in MIN6 cells. FHL2-knockdown led to enhanced activation of forkhead box protein O1 (FOXO1) and its downstream genes such as Mafa and Pdx1 (encoding pancreatic and duodenal homeobox 1), as well as increased glucose uptake. On the other hand, FHL2 overexpression in MIN6 cells blocked GSIS, increased the formation of reactive oxygen species and increased c-Jun activity. CONCLUSIONS/INTERPRETATION Our data demonstrate that FHL2 deficiency improves insulin secretion from beta cells and improves glucose tolerance in mice. Given that FHL2 expression in humans increases with age and that high expression levels of FHL2 are associated with beta cell dysfunction, we propose that enhanced FHL2 expression in elderly individuals contributes to glucose intolerance and the development of type 2 diabetes. DATA AVAILABILITY The human islet microarray datasets used are publicly available and can be found on https://www.ncbi.nlm.nih.gov/geo/ .
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Affiliation(s)
- Jayron J Habibe
- Department of Medical Biochemistry, Amsterdam UMC, location University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Cardiovascular Sciences, Diabetes and Metabolism, University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Gastroenterology, Endocrinology and Metabolism, University of Amsterdam, Amsterdam, the Netherlands
- Department of Physiology, Amsterdam UMC, location Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - Maria P Clemente-Olivo
- Department of Medical Biochemistry, Amsterdam UMC, location University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Cardiovascular Sciences, Diabetes and Metabolism, University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Gastroenterology, Endocrinology and Metabolism, University of Amsterdam, Amsterdam, the Netherlands
| | - Torsten P M Scheithauer
- Department of Experimental Vascular Medicine, Amsterdam UMC, location University of Amsterdam, Amsterdam, the Netherlands
| | - Elena Rampanelli
- Department of Experimental Vascular Medicine, Amsterdam UMC, location University of Amsterdam, Amsterdam, the Netherlands
| | - Hilde Herrema
- Department of Experimental Vascular Medicine, Amsterdam UMC, location University of Amsterdam, Amsterdam, the Netherlands
| | - Mariska Vos
- Department of Medical Biochemistry, Amsterdam UMC, location University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Cardiovascular Sciences, Diabetes and Metabolism, University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Gastroenterology, Endocrinology and Metabolism, University of Amsterdam, Amsterdam, the Netherlands
| | - Arnout Mieremet
- Department of Medical Biochemistry, Amsterdam UMC, location University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Cardiovascular Sciences, Diabetes and Metabolism, University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Gastroenterology, Endocrinology and Metabolism, University of Amsterdam, Amsterdam, the Netherlands
| | - Max Nieuwdorp
- Department of Experimental Vascular Medicine, Amsterdam UMC, location University of Amsterdam, Amsterdam, the Netherlands
| | - Daniel H van Raalte
- Department of Internal Medicine, Diabetes Center, Amsterdam UMC, location Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - Etto C Eringa
- Department of Physiology, Amsterdam UMC, location Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
- Department of Physiology, Cardiovascular Institute Maastricht, Maastricht, the Netherlands
| | - Carlie J M de Vries
- Department of Medical Biochemistry, Amsterdam UMC, location University of Amsterdam, Amsterdam, the Netherlands.
- Amsterdam Cardiovascular Sciences, Diabetes and Metabolism, University of Amsterdam, Amsterdam, the Netherlands.
- Amsterdam Gastroenterology, Endocrinology and Metabolism, University of Amsterdam, Amsterdam, the Netherlands.
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Li ZA, Cho JH, Woodhams LG, Hughes JW. Fluorescence imaging of beta cell primary cilia. Front Endocrinol (Lausanne) 2022; 13:1004136. [PMID: 36213262 PMCID: PMC9540379 DOI: 10.3389/fendo.2022.1004136] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 09/01/2022] [Indexed: 11/25/2022] Open
Abstract
Primary cilia are slender cell-surface organelles that project into the intercellular space. In pancreatic beta cells, primary cilia coordinate a variety of cell responses including GPCR signaling, calcium influx, and insulin secretion, along with likely many underappreciated roles in islet development and differentiation. To study cilia function in islet biology, direct visualization of primary cilia by microscopic methods is often a necessary first step. Ciliary abundance, distribution, and morphology are heterogeneous among islet cells and are best visualized by fluorescence microscopy, the tools for which are readily accessible to most researchers. Here we present a collection of fluorescence imaging methods that we have adopted and optimized for the observation of primary cilia in mouse and human islets. These include conventional confocal microscopy using fixed islets and pancreas sections, live-cell imaging with cilia-targeted biosensors and probes, cilia motion recordings, and quantitative analysis of primary cilia waveform in the ex vivo environment. We discuss practical considerations and limitations of our approaches as well as new tools on the horizon to facilitate the observation of primary cilia in pancreatic islets.
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Affiliation(s)
- Zipeng A. Li
- Department of Medicine, Washington University School of Medicine, Saint Louis, MO, United States
| | - Jung Hoon Cho
- Department of Medicine, Washington University School of Medicine, Saint Louis, MO, United States
| | - Louis G. Woodhams
- Department of Mechanical Engineering and Materials Science, Washington University McKelvey School of Engineering, Saint Louis, MO, United States
| | - Jing W. Hughes
- Department of Medicine, Washington University School of Medicine, Saint Louis, MO, United States
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Cho JH, Li ZA, Zhu L, Muegge BD, Roseman HF, Lee EY, Utterback T, Woodhams LG, Bayly PV, Hughes JW. Islet primary cilia motility controls insulin secretion. SCIENCE ADVANCES 2022; 8:eabq8486. [PMID: 36149960 PMCID: PMC9506710 DOI: 10.1126/sciadv.abq8486] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 07/13/2022] [Indexed: 06/16/2023]
Abstract
Primary cilia are specialized cell-surface organelles that mediate sensory perception and, in contrast to motile cilia and flagella, are thought to lack motility function. Here, we show that primary cilia in human and mouse pancreatic islets exhibit movement that is required for glucose-dependent insulin secretion. Islet primary cilia contain motor proteins conserved from those found in classic motile cilia, and their three-dimensional motion is dynein-driven and dependent on adenosine 5'-triphosphate and glucose metabolism. Inhibition of cilia motion blocks beta cell calcium influx and insulin secretion. Human beta cells have enriched ciliary gene expression, and motile cilia genes are altered in type 2 diabetes. Our findings redefine primary cilia as dynamic structures having both sensory and motile function and establish that pancreatic islet cilia movement plays a regulatory role in insulin secretion.
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Affiliation(s)
- Jung Hoon Cho
- Department of Medicine, Washington University School of Medicine, 660 South Euclid Ave, St. Louis, MO, USA
| | - Zipeng A. Li
- Department of Medicine, Washington University School of Medicine, 660 South Euclid Ave, St. Louis, MO, USA
| | - Lifei Zhu
- Department of Medicine, Washington University School of Medicine, 660 South Euclid Ave, St. Louis, MO, USA
| | - Brian D. Muegge
- Department of Medicine, Washington University School of Medicine, 660 South Euclid Ave, St. Louis, MO, USA
- Department of Medicine, VA Medical Center, 915 North Grand Blvd, St. Louis, MO, USA
| | - Henry F. Roseman
- Department of Medicine, Washington University School of Medicine, 660 South Euclid Ave, St. Louis, MO, USA
| | - Eun Young Lee
- Department of Medicine, Washington University School of Medicine, 660 South Euclid Ave, St. Louis, MO, USA
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Seoul St. Mary’s Hospital, The Catholic University of Korea, Seoul, South Korea
| | - Toby Utterback
- Department of Mechanical Engineering and Materials Science, Washington University McKelvey School of Engineering, 1 Brookings Drive, St. Louis, MO, USA
| | - Louis G. Woodhams
- Department of Mechanical Engineering and Materials Science, Washington University McKelvey School of Engineering, 1 Brookings Drive, St. Louis, MO, USA
| | - Philip V. Bayly
- Department of Mechanical Engineering and Materials Science, Washington University McKelvey School of Engineering, 1 Brookings Drive, St. Louis, MO, USA
| | - Jing W. Hughes
- Department of Medicine, Washington University School of Medicine, 660 South Euclid Ave, St. Louis, MO, USA
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Nicotinamide riboside kinase 1 protects against diet and age-induced pancreatic β-cell failure. Mol Metab 2022; 66:101605. [PMID: 36165811 PMCID: PMC9557729 DOI: 10.1016/j.molmet.2022.101605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 09/10/2022] [Accepted: 09/16/2022] [Indexed: 12/29/2022] Open
Abstract
OBJECTIVE Disturbances in NAD+ metabolism have been described as a hallmark for multiple metabolic and age-related diseases, including type 2 diabetes. While alterations in pancreatic β-cell function are critical determinants of whole-body glucose homeostasis, the role of NAD+ metabolism in the endocrine pancreas remains poorly explored. Here, we aimed to evaluate the role of nicotinamide riboside (NR) metabolism in maintaining NAD+ levels and pancreatic β-cell function in pathophysiological conditions. METHODS Whole body and pancreatic β-cell-specific NRK1 knockout (KO) mice were metabolically phenotyped in situations of high-fat feeding and aging. We also analyzed pancreatic β-cell function, β-cell mass and gene expression. RESULTS We first demonstrate that NRK1, the essential enzyme for the utilization of NR, is abundantly expressed in pancreatic β-cells. While NR treatment did not alter glucose-stimulated insulin secretion in pancreatic islets from young healthy mice, NRK1 knockout mice displayed glucose intolerance and compromised β-cells response to a glucose challenge upon high-fat feeding or aging. Interestingly, β cell dysfunction stemmed from the functional failure of other organs, such as liver and kidney, and the associated changes in circulating peptides and hormones, as mice lacking NRK1 exclusively in β-cells did not show altered glucose homeostasis. CONCLUSIONS This work unveils a new physiological role for NR metabolism in the maintenance of glucose tolerance and pancreatic β-cell function in high-fat feeding or aging conditions.
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Li M, Feng F, Feng H, Hu P, Xue Y, Xu T, Song E. VAMP4 regulates insulin levels by targeting secretory granules to lysosomes. J Cell Biol 2022; 221:213439. [PMID: 36053215 PMCID: PMC9441717 DOI: 10.1083/jcb.202110164] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 06/28/2022] [Accepted: 07/25/2022] [Indexed: 11/22/2022] Open
Abstract
Insulin levels are essential for the maintenance of glucose homeostasis, and deviations lead to pathoglycemia or diabetes. However, the metabolic mechanism controlling insulin quantity and quality is poorly understood. In pancreatic β cells, insulin homeostasis and release are tightly governed by insulin secretory granule (ISG) trafficking, but the required regulators and mechanisms are largely unknown. Here, we identified that VAMP4 controlled the insulin levels in response to glucose challenge. VAMP4 deficiency led to increased blood insulin levels and hyperresponsiveness to glucose. In β cells, VAMP4 is packaged into immature ISGs (iISGs) at trans-Golgi networks and subsequently resorted to clathrin-coated vesicles during granule maturation. VAMP4-positive iISGs and resorted vesicles then fuse with lysosomes facilitated by a SNARE complex consisting of VAMP4, STX7, STX8, and VTI1B, which ensures the breakdown of excess (pro)insulin and obsolete materials and thus maintenance of intracellular insulin homeostasis. Thus, VAMP4 is a key factor regulating the insulin levels and a potential target for the treatment of diabetes.
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Affiliation(s)
- Min Li
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China,Guangzhou Laboratory, Guangzhou, China,Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou, China,Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
| | - Fengping Feng
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Han Feng
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Pengkai Hu
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Yanhong Xue
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Tao Xu
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China,Guangzhou Laboratory, Guangzhou, China,Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China,Dr. Tao Xu:
| | - Eli Song
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China,Correspondence to Dr. Eli Song:
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40
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Wrublewsky S, Glas J, Carlein C, Nalbach L, Hoffmann MDA, Pack M, Vilas-Boas EA, Ribot N, Kappl R, Menger MD, Laschke MW, Ampofo E, Roma LP. The loss of pancreatic islet NADPH oxidase (NOX)2 improves islet transplantation. Redox Biol 2022; 55:102419. [PMID: 35933903 PMCID: PMC9357848 DOI: 10.1016/j.redox.2022.102419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 07/19/2022] [Accepted: 07/21/2022] [Indexed: 10/31/2022] Open
Abstract
Islet transplantation is a promising treatment strategy for type 1 diabetes mellitus (T1DM) patients. However, oxidative stress-induced graft failure due to an insufficient revascularization is a major problem of this therapeutic approach. NADPH oxidase (NOX)2 is an important producer of reactive oxygen species (ROS) and several studies have already reported that this enzyme plays a crucial role in the endocrine function and viability of β-cells. Therefore, we hypothesized that targeting islet NOX2 improves the outcome of islet transplantation. To test this, we analyzed the cellular composition and viability of isolated wild-type (WT) and Nox2-/- islets by immunohistochemistry as well as different viability assays. Ex vivo, the effect of Nox2 deficiency on superoxide production, endocrine function and anti-oxidant protein expression was studied under hypoxic conditions. In vivo, we transplanted WT and Nox2-/- islets into mouse dorsal skinfold chambers and under the kidney capsule of diabetic mice to assess their revascularization and endocrine function, respectively. We found that the loss of NOX2 does not affect the cellular composition and viability of isolated islets. However, decreased superoxide production, higher glucose-stimulated insulin secretion as well as expression of nuclear factor erythroid 2-related factor (Nrf)2, heme oxygenase (HO)-1 and superoxide dismutase 1 (SOD1) was detected in hypoxic Nox2-/- islets when compared to WT islets. Moreover, we detected an early revascularization, a higher take rate and restoration of normoglycemia in diabetic mice transplanted with Nox2-/- islets. These findings indicate that the suppression of NOX2 activity represents a promising therapeutic strategy to improve engraftment and function of isolated islets.
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Affiliation(s)
- Selina Wrublewsky
- Institute for Clinical and Experimental Surgery, Saarland University, 66421, Homburg, Germany
| | - Julia Glas
- Institute for Clinical and Experimental Surgery, Saarland University, 66421, Homburg, Germany
| | - Christopher Carlein
- Department of Biophysics, Center for Human and Molecular Biology (ZHMB), Saarland University, 66421, Homburg, Germany
| | - Lisa Nalbach
- Institute for Clinical and Experimental Surgery, Saarland University, 66421, Homburg, Germany
| | | | - Mandy Pack
- Medical Biochemistry and Molecular Biology, Saarland University, 66421, Homburg, Germany
| | - Eloisa Aparecida Vilas-Boas
- Department of Biophysics, Center for Human and Molecular Biology (ZHMB), Saarland University, 66421, Homburg, Germany; Department of Biochemistry, Institute of Chemistry, University of São Paulo (USP), São Paulo, 05508-900, Brazil
| | - Nathan Ribot
- Department of Biophysics, Center for Human and Molecular Biology (ZHMB), Saarland University, 66421, Homburg, Germany
| | - Reinhard Kappl
- Department of Biophysics, Center for Human and Molecular Biology (ZHMB), Saarland University, 66421, Homburg, Germany
| | - Michael D Menger
- Institute for Clinical and Experimental Surgery, Saarland University, 66421, Homburg, Germany
| | - Matthias W Laschke
- Institute for Clinical and Experimental Surgery, Saarland University, 66421, Homburg, Germany
| | - Emmanuel Ampofo
- Institute for Clinical and Experimental Surgery, Saarland University, 66421, Homburg, Germany
| | - Leticia Prates Roma
- Department of Biophysics, Center for Human and Molecular Biology (ZHMB), Saarland University, 66421, Homburg, Germany.
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Wrublewsky S, Speer T, Nalbach L, Boewe AS, Pack M, Alansary D, Roma LP, Hoffmann MDA, Schmitt BM, Weinzierl A, Menger MD, Laschke MW, Ampofo E. Targeting Pancreatic Islet NLRP3 Improves Islet Graft Revascularization. Diabetes 2022; 71:1706-1720. [PMID: 35622000 DOI: 10.2337/db21-0851] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 04/21/2022] [Indexed: 11/13/2022]
Abstract
Hypoxia-induced islet cell death, caused by an insufficient revascularization of the grafts, is a major obstacle for successful pancreatic islet transplantation. Recently, it has been reported that the nucleotide-binding oligomerization domain-like receptor protein 3 (NLRP3) inflammasome is expressed in pancreatic islets and that its loss protects against hypoxia-induced cell death. Therefore, we hypothesized that the inhibition of NLRP3 in islets improves the survival and endocrine function of the grafts. The transplantation of Nlrp3-/- islets or wild-type (WT) islets exposed to the NLRP3 inhibitor CY-09 into mouse dorsal skinfold chambers resulted in an improved revascularization compared with controls. An increased insulin release after NLRP3 inhibition caused the enhanced angiogenic response. Moreover, the inhibition of NLRP3 in hypoxic β-cells triggered insulin gene expression by inducing the shuttling of MafA and pancreatic and duodenal homeobox-1 into the nucleus. This was mediated by a reduced interaction of NLRP3 with the thioredoxin-interacting protein (TXNIP). Transplantation of Nlrp3-/- islets or WT islets exposed to CY-09 under the kidney capsule of diabetic mice markedly improved the restoration of normoglycemia. These findings indicate that the inhibition of NLRP3 in isolated islets represents a promising therapeutic strategy to improve engraftment and function of the islets.
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Affiliation(s)
- Selina Wrublewsky
- Institute for Clinical and Experimental Surgery, Saarland University, Homburg/Saar, Germany
| | - Thimoteus Speer
- Department of Internal Medicine IV (Nephrology and Hypertension) and Translational Cardio-Renal Medicine, Saarland University, Homburg/Saar, Germany
| | - Lisa Nalbach
- Institute for Clinical and Experimental Surgery, Saarland University, Homburg/Saar, Germany
| | - Anne S Boewe
- Institute for Clinical and Experimental Surgery, Saarland University, Homburg/Saar, Germany
| | - Mandy Pack
- Medical Biochemistry and Molecular Biology, Saarland University, Homburg/Saar, Germany
| | - Dalia Alansary
- Biophysics Department, Center for Human and Molecular Biology, Saarland University, Homburg/Saar, Germany
| | - Leticia P Roma
- Biophysics Department, Center for Human and Molecular Biology, Saarland University, Homburg/Saar, Germany
| | - Markus D A Hoffmann
- Biophysics Department, Center for Human and Molecular Biology, Saarland University, Homburg/Saar, Germany
| | - Beate M Schmitt
- Institute for Clinical and Experimental Surgery, Saarland University, Homburg/Saar, Germany
| | - Andrea Weinzierl
- Institute for Clinical and Experimental Surgery, Saarland University, Homburg/Saar, Germany
| | - Michael D Menger
- Institute for Clinical and Experimental Surgery, Saarland University, Homburg/Saar, Germany
| | - Matthias W Laschke
- Institute for Clinical and Experimental Surgery, Saarland University, Homburg/Saar, Germany
| | - Emmanuel Ampofo
- Institute for Clinical and Experimental Surgery, Saarland University, Homburg/Saar, Germany
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Biondi G, Marrano N, Dipaola L, Borrelli A, Rella M, D'Oria R, Genchi VA, Caccioppoli C, Porreca I, Cignarelli A, Perrini S, Marchetti P, Vincenti L, Laviola L, Giorgino F, Natalicchio A. The p66Shc Protein Mediates Insulin Resistance and Secretory Dysfunction in Pancreatic β-Cells Under Lipotoxic Conditions. Diabetes 2022; 71:1763-1771. [PMID: 35612429 DOI: 10.2337/db21-1066] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 05/16/2022] [Indexed: 11/13/2022]
Abstract
We evaluated the role of the p66Shc redox adaptor protein in pancreatic β-cell insulin resistance that develops under lipotoxic conditions and with excess body fat. Prolonged exposure to palmitate in vitro or the presence of overweight/obesity augmented p66Shc expression levels and caused an impaired ability of exogenous insulin to increase cellular insulin content and secreted C-peptide levels in INS-1E cells and human and murine islets. In INS-1E cells, p66Shc knockdown resulted in enhanced insulin-induced augmentation of insulin content and C-peptide secretion and prevented the ability of palmitate to impair these effects of insulin. Conversely, p66Shc overexpression impaired insulin-induced augmentation of insulin content and C-peptide secretion in both the absence and presence of palmitate. Under lipotoxic condition, the effects of p66Shc are mediated by a p53-induced increase in p66Shc protein levels and JNK-induced p66Shc phosphorylation at Ser36 and appear to involve the phosphorylation of the ribosomal protein S6 kinase at Thr389 and of insulin receptor substrate 1 at Ser307, resulting in the inhibition of insulin-stimulated protein kinase B phosphorylation at Ser473. Thus, the p66Shc protein mediates the impaired β-cell function and insulin resistance induced by saturated fatty acids and excess body fat.
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Affiliation(s)
- Giuseppina Biondi
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Nicola Marrano
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Lucia Dipaola
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Anna Borrelli
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Martina Rella
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Rossella D'Oria
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Valentina A Genchi
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Cristina Caccioppoli
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Immacolata Porreca
- Genetic Research Centre "Gaetano Salvatore" BioGeM, Ariano Irpino, Italy
| | - Angelo Cignarelli
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Sebastio Perrini
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Piero Marchetti
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Leonardo Vincenti
- Division of General Surgery, University Hospital Polyclinic, Bari, Italy
| | - Luigi Laviola
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Francesco Giorgino
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Annalisa Natalicchio
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
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43
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Hong HJ, Joung KH, Kim YK, Choi MJ, Kang SG, Kim JT, Kang YE, Chang JY, Moon JH, Jun S, Ro HJ, Lee Y, Kim H, Park JH, Kang BE, Jo Y, Choi H, Ryu D, Lee CH, Kim H, Park KS, Kim HJ, Shong M. Mitoribosome insufficiency in β cells is associated with type 2 diabetes-like islet failure. EXPERIMENTAL & MOLECULAR MEDICINE 2022; 54:932-945. [PMID: 35804190 PMCID: PMC9355985 DOI: 10.1038/s12276-022-00797-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 02/22/2022] [Accepted: 03/14/2022] [Indexed: 12/04/2022]
Abstract
Genetic variations in mitoribosomal subunits and mitochondrial transcription factors are related to type 2 diabetes. However, the role of islet mitoribosomes in the development of type 2 diabetes has not been determined. We investigated the effects of the mitoribosomal gene on β-cell function and glucose homeostasis. Mitoribosomal gene expression was analyzed in datasets from the NCBI GEO website (GSE25724, GSE76894, and GSE76895) and the European Nucleotide Archive (ERP017126), which contain the transcriptomes of type 2 diabetic and nondiabetic organ donors. We found deregulation of most mitoribosomal genes in islets from individuals with type 2 diabetes, including partial downregulation of CRIF1. The phenotypes of haploinsufficiency in a single mitoribosomal gene were examined using β-cell-specific Crif1 (Mrpl59) heterozygous-deficient mice. Crif1beta+/− mice had normal glucose tolerance, but their islets showed a loss of first-phase glucose-stimulated insulin secretion. They also showed increased β-cell mass associated with higher expression of Reg family genes. However, Crif1beta+/− mice showed earlier islet failure in response to high-fat feeding, which was exacerbated by aging. Haploinsufficiency of a single mitoribosomal gene predisposes rodents to glucose intolerance, which resembles the early stages of type 2 diabetes in humans. Disruptions in the mitochondrial protein synthesis machinery give rise to metabolic disturbances that lay the foundation for type 2 diabetes. As physiological glucose levels rise, the energy-generating machinery of the mitochondria responds with increased activity, which stimulates insulin secretion. Many proteins responsible for mitochondrial metabolism are produced by ribosomes within this cellular organelle. Researchers led by Hyun Jin Kim and Minho Shong at Chungnam National University, Daejon, South Korea, have determined that mutations affecting a mitochondrial ribosomal protein called CRIF1 can lead to impaired insulin release. Mice with reduced CRIF1 were initially healthy, but as they aged, exhibited signs of impaired pancreatic function similar to those seen in patients with early-stage diabetes. This process was accelerated by consumption of a high-fat diet, and the researchers propose that this mechanism may be directly relevant to human disease.
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Affiliation(s)
- Hyun Jung Hong
- Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon, 35015, Korea.,Department of Medical Science, Chungnam National University School of Medicine, Daejeon, 35015, Korea
| | - Kyong Hye Joung
- Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon, 35015, Korea.,Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, 35015, Korea
| | - Yong Kyung Kim
- Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon, 35015, Korea
| | - Min Jeong Choi
- Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon, 35015, Korea
| | - Seul Gi Kang
- Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon, 35015, Korea
| | - Jung Tae Kim
- Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon, 35015, Korea.,Department of Medical Science, Chungnam National University School of Medicine, Daejeon, 35015, Korea
| | - Yea Eun Kang
- Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon, 35015, Korea.,Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, 35015, Korea
| | - Joon Young Chang
- Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon, 35015, Korea.,Department of Medical Science, Chungnam National University School of Medicine, Daejeon, 35015, Korea
| | - Joon Ho Moon
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Korea
| | - Sangmi Jun
- Center for Research Equipment, Korea Basic Science Institute, Cheongju, 28119, Korea.,Convergent Research Center for Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon, 34114, Korea
| | - Hyun-Joo Ro
- Center for Research Equipment, Korea Basic Science Institute, Cheongju, 28119, Korea.,Convergent Research Center for Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon, 34114, Korea
| | - Yujeong Lee
- Center for Research Equipment, Korea Basic Science Institute, Cheongju, 28119, Korea.,Convergent Research Center for Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon, 34114, Korea
| | - Hyeongseok Kim
- Department of Biochemistry, Chungnam National University School of Medicine, Daejeon, 35015, Korea
| | - Jae-Hyung Park
- Department of Physiology, Keimyung University School of Medicine, Daegu, 704-200, Korea
| | - Baeki E Kang
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, 16419, Korea
| | - Yunju Jo
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, 16419, Korea
| | - Heejung Choi
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, 16419, Korea
| | - Dongryeol Ryu
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, 16419, Korea.,Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University, Suwon, 16419, Korea.,Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, 06351, Korea
| | - Chul-Ho Lee
- Animal Model Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Korea
| | - Hail Kim
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Korea
| | - Kyu-Sang Park
- Department of Physiology, Yonsei University Wonju College of Medicine, Wonju, 26426, Korea
| | - Hyun Jin Kim
- Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon, 35015, Korea. .,Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, 35015, Korea.
| | - Minho Shong
- Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon, 35015, Korea. .,Department of Medical Science, Chungnam National University School of Medicine, Daejeon, 35015, Korea. .,Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, 35015, Korea.
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44
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Wu Y, Wong CW, Chiles EN, Mellinger AL, Bae H, Jung S, Peterson T, Wang J, Negrete M, Huang Q, Wang L, Jang C, Muddiman DC, Su X, Williamson I, Shen X. Glycerate from intestinal fructose metabolism induces islet cell damage and glucose intolerance. Cell Metab 2022; 34:1042-1053.e6. [PMID: 35688154 PMCID: PMC9897509 DOI: 10.1016/j.cmet.2022.05.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 12/21/2021] [Accepted: 05/18/2022] [Indexed: 02/06/2023]
Abstract
Dietary fructose, especially in the context of a high-fat western diet, has been linked to type 2 diabetes. Although the effect of fructose on liver metabolism has been extensively studied, a significant portion of the fructose is first metabolized in the small intestine. Here, we report that dietary fat enhances intestinal fructose metabolism, which releases glycerate into the blood. Chronic high systemic glycerate levels induce glucose intolerance by slowly damaging pancreatic islet cells and reducing islet sizes. Our findings provide a link between dietary fructose and diabetes that is modulated by dietary fat.
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Affiliation(s)
- Yanru Wu
- Department of Prosthodontics, School and Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China; Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, USA
| | - Chi Wut Wong
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, USA; Department of Pharmacology & Cancer Biology, Duke University Medical Center, Durham, NC 27710, USA
| | - Eric N Chiles
- Metabolomics Shared Resource, Rutgers Cancer Institute of New Jersey, Rutgers University, New Brunswick, NJ 08903, USA
| | - Allyson L Mellinger
- FTMS Laboratory for Human Health Research, Department of Chemistry, North Carolina State University, Raleigh, NC 27695, USA
| | - Hosung Bae
- Department of Biological Chemistry, University of California, Irvine, Irvine, CA 92697, USA
| | - Sunhee Jung
- Department of Biological Chemistry, University of California, Irvine, Irvine, CA 92697, USA
| | - Ted Peterson
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, USA
| | - Jamie Wang
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, USA
| | - Marcos Negrete
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, USA
| | - Qiang Huang
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, USA; Department of Pediatric Surgery, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shanxi 710004, China
| | - Lihua Wang
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, USA
| | - Cholsoon Jang
- Department of Biological Chemistry, University of California, Irvine, Irvine, CA 92697, USA
| | - David C Muddiman
- FTMS Laboratory for Human Health Research, Department of Chemistry, North Carolina State University, Raleigh, NC 27695, USA; Molecular Education, Technology and Research Innovation Center, North Carolina State University, Raleigh, NC 27695, USA
| | - Xiaoyang Su
- Metabolomics Shared Resource, Rutgers Cancer Institute of New Jersey, Rutgers University, New Brunswick, NJ 08903, USA; Department of Medicine, Robert Wood Johnson Medical School, Rutgers University, New Brunswick, NJ 08901, USA
| | - Ian Williamson
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, USA; Gastroenterology Division, Department of Medicine, Duke University, Durham, NC 27710, USA.
| | - Xiling Shen
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC 27708, USA; Terasaki Institute for Biomedical Innovation, Los Angeles, CA 90024, USA.
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45
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Prevenzano I, Leone A, Longo M, Nicolò A, Cabaro S, Collina F, Panarese I, Botti G, Formisano P, Napoli R, Beguinot F, Miele C, Nigro C. Glyoxalase 1 knockdown induces age-related β-cell dysfunction and glucose intolerance in mice. EMBO Rep 2022; 23:e52990. [PMID: 35620868 PMCID: PMC9253754 DOI: 10.15252/embr.202152990] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 04/20/2022] [Accepted: 05/02/2022] [Indexed: 09/09/2023] Open
Abstract
Tight control of glycemia is a major treatment goal for type 2 diabetes mellitus (T2DM). Clinical studies indicated that factors other than poor glycemic control may be important in fostering T2DM progression. Increased levels of methylglyoxal (MGO) associate with complications development, but its role in the early steps of T2DM pathogenesis has not been defined. Here, we show that MGO accumulation induces an age-dependent impairment of glucose tolerance and glucose-stimulated insulin secretion in mice knockdown for glyoxalase 1 (Glo1KD). This metabolic alteration associates with the presence of insular inflammatory infiltration (F4/80-positive staining), the islet expression of senescence markers, and higher levels of cytokines (MCP-1 and TNF-α), part of the senescence-activated secretory profile, in the pancreas from 10-month-old Glo1KD mice, compared with their WT littermates. In vitro exposure of INS832/13 β-cells to MGO confirms its casual role on β-cell dysfunction, which can be reverted by senolytic treatment. These data indicate that MGO is capable to induce early phenotypes typical of T2D progression, paving the way for novel prevention approaches to T2DM.
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Affiliation(s)
- Immacolata Prevenzano
- URT Genomics of Diabetes‐IEOSCNR & Department of Translational Medicine – Federico IIUniversity of NaplesNaplesItaly
| | - Alessia Leone
- URT Genomics of Diabetes‐IEOSCNR & Department of Translational Medicine – Federico IIUniversity of NaplesNaplesItaly
| | - Michele Longo
- URT Genomics of Diabetes‐IEOSCNR & Department of Translational Medicine – Federico IIUniversity of NaplesNaplesItaly
| | - Antonella Nicolò
- URT Genomics of Diabetes‐IEOSCNR & Department of Translational Medicine – Federico IIUniversity of NaplesNaplesItaly
| | - Serena Cabaro
- URT Genomics of Diabetes‐IEOSCNR & Department of Translational Medicine – Federico IIUniversity of NaplesNaplesItaly
| | - Francesca Collina
- Pathology UnitIstituto Nazionale Tumori‐IRCCS‐Fondazione G.PascaleNaplesItaly
| | - Iacopo Panarese
- Unità di Anatomia PatologicaDipartimento di Salute Mentale e Fisica e Medicina PreventivaUniversità degli Studi della Campania "L. Vanvitelli"NaplesItaly
| | - Gerardo Botti
- Scientific DirectionIstituto Nazionale Tumori‐IRCCS‐Fondazione G.PascaleNaplesItaly
| | - Pietro Formisano
- URT Genomics of Diabetes‐IEOSCNR & Department of Translational Medicine – Federico IIUniversity of NaplesNaplesItaly
| | - Raffaele Napoli
- URT Genomics of Diabetes‐IEOSCNR & Department of Translational Medicine – Federico IIUniversity of NaplesNaplesItaly
| | - Francesco Beguinot
- URT Genomics of Diabetes‐IEOSCNR & Department of Translational Medicine – Federico IIUniversity of NaplesNaplesItaly
| | - Claudia Miele
- URT Genomics of Diabetes‐IEOSCNR & Department of Translational Medicine – Federico IIUniversity of NaplesNaplesItaly
| | - Cecilia Nigro
- URT Genomics of Diabetes‐IEOSCNR & Department of Translational Medicine – Federico IIUniversity of NaplesNaplesItaly
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46
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Ou K, Song J, Zhang S, Fang L, Lin L, Lan M, Chen M, Wang C. Prenatal exposure to a mixture of PAHs causes the dysfunction of islet cells in adult male mice: Association with type 1 diabetes mellitus. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 239:113695. [PMID: 35623150 DOI: 10.1016/j.ecoenv.2022.113695] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 05/20/2022] [Accepted: 05/22/2022] [Indexed: 06/15/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) have been detected throughout the human body. Whether exposure to PAHs is associated with the incidence of type 1 diabetes mellitus should be investigated. To this end, pregnant mice were exposed to mixed PAHs (5, 50, or 500 μg/kg) once every other day during gestation. The adult male offspring displayed impaired glucose tolerance and reduced serum levels of glucagon and insulin. Immunohistochemical staining revealed increased numbers of apoptotic β-cells and a reduced β-cell mass in these males. The downregulated expression of pancreatic estrogen receptor α, androgen receptor, and transcription factor PDX1 was responsible for impacting β-cell development. The relatively reduced α-cell area was associated with downregulated ARX expression. The transcription of Isn2 and Gcg in pancreatic tissue was downregulated, which indicated that the function of β-cells and α-cells was impaired. Methylation levels in the Isn2 promotor were significantly elevated in mice prenatally exposed to 500 µg/kg PAHs, which was consistent with the change in its mRNA levels. The number of macrophages infiltrating islets was significantly increased, indicating that prenatal PAH exposure might reduce islet cell numbers in an autoimmune manner. This study shows that prenatal exposure to PAHs may promote the pathogenesis of type 1 diabetes mellitus.
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Affiliation(s)
- Kunlin Ou
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Jialin Song
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Siqi Zhang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Lu Fang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Lesi Lin
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Miaolin Lan
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Meng Chen
- College of Environment & Ecology, Xiamen University, Xiamen, Fujian 361005, PR China.
| | - Chonggang Wang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, PR China.
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47
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Luseogliflozin preserves the pancreatic beta-cell mass and function in db/db mice by improving mitochondrial function. Sci Rep 2022; 12:9740. [PMID: 35697838 PMCID: PMC9192642 DOI: 10.1038/s41598-022-13888-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 05/30/2022] [Indexed: 11/20/2022] Open
Abstract
We aimed to determine the mechanism by which the sodium glucose co-transporter 2 inhibitor, luseogliflozin, preserves pancreatic beta-cell mass and function in db/db mice. Six-week-old db/db mice were fed to standard chow or standard chow containing 0.01% luseogliflozin. After 4 weeks, DNA microarray analysis, real-time PCR analysis, and measurement of mitochondrial respiratory capacity and reactive oxygen species (ROS) generation were performed using isolated islets. Immunohistochemistry and electron microscopic analysis were performed using pancreatic tissues. Metabolites extracted from the islets were measured by capillary electrophoresis mass spectrometry. The expression of genes involved in the tricarboxylic acid (TCA) cycle and electron transport chain was upregulated by luseogliflozin. Luseogliflozin improved the mitochondrial complex II-linked oxidative phosphorylation capacity and reduced ROS generation. Mitochondrial morphology was normally maintained by luseogliflozin. Luseogliflozin increased NK6 homeobox 1 (NKX6.1) expression and TCA cycle metabolites. Relief of glucotoxicity by luseogliflozin may involve lower mitochondrial ROS generation and an improvement in complex II-linked mitochondrial respiration. Reducing ROS generation through preventing complex II damage likely increases NKX6.1 expression and ameliorate glucose metabolism in the TCA cycle, contributing to the protection of pancreatic beta-cells. Protection of complex II in pancreatic beta-cells represents a novel therapeutic target for type 2 diabetes.
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48
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Zhao Y, Wang QY, Zeng LT, Wang JJ, Liu Z, Fan GQ, Li J, Cai JP. Long-Term High-Fat High-Fructose Diet Induces Type 2 Diabetes in Rats through Oxidative Stress. Nutrients 2022; 14:nu14112181. [PMID: 35683981 PMCID: PMC9182436 DOI: 10.3390/nu14112181] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/13/2022] [Accepted: 05/20/2022] [Indexed: 12/25/2022] Open
Abstract
Long-term consumption of a Western diet is a major cause of type 2 diabetes mellitus (T2DM). However, the effects of diet on pancreatic structure and function remain unclear. Rats fed a high-fat, high-fructose (HFHF) diet were compared with rats fed a normal diet for 3 and 18 months. Plasma biochemical parameters and inflammatory factors were used to reflect metabolic profile and inflammatory status. The rats developed metabolic disorders, and the size of the islets in the pancreas increased after 3 months of HFHF treatment but decreased and became irregular after 18 months. Fasting insulin, C-peptide, proinsulin, and intact proinsulin levels were significantly higher in the HFHF group than those in the age-matched controls. Plasmatic oxidative parameters and nucleic acid oxidation markers (8-oxo-Gsn and 8-oxo-dGsn) became elevated before inflammatory factors, suggesting that the HFHF diet increased the degree of oxidative stress before affecting inflammation. Single-cell RNA sequencing also verified that the transcriptional level of oxidoreductase changed differently in islet subpopulations with aging and long-term HFHF diet. We demonstrated that long-term HFHF diet and aging-associated structural and transcriptomic changes that underlie pancreatic islet functional decay is a possible underlying mechanism of T2DM, and our study could provide new insights to prevent the development of diet-induced T2DM.
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Affiliation(s)
- Yue Zhao
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Hospital/National Center of Gerontology of National Health Commission, Beijing 100730, China; (Y.Z.); (Q.-Y.W.); (Z.L.); (G.-Q.F.); (J.L.)
- Graduate School of Peking Union Medical College, Beijing 100730, China
| | - Qing-Yu Wang
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Hospital/National Center of Gerontology of National Health Commission, Beijing 100730, China; (Y.Z.); (Q.-Y.W.); (Z.L.); (G.-Q.F.); (J.L.)
| | - Lv-Tao Zeng
- Peking University Fifth School of Clinical Medicine, Beijing Hospital/National Center of Gerontology of National Health Commission, Beijing 100730, China;
| | - Jing-Jing Wang
- Department of Clinical Laboratory, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Zhengzhou 450066, China;
| | - Zhen Liu
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Hospital/National Center of Gerontology of National Health Commission, Beijing 100730, China; (Y.Z.); (Q.-Y.W.); (Z.L.); (G.-Q.F.); (J.L.)
- Graduate School of Peking Union Medical College, Beijing 100730, China
| | - Guo-Qing Fan
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Hospital/National Center of Gerontology of National Health Commission, Beijing 100730, China; (Y.Z.); (Q.-Y.W.); (Z.L.); (G.-Q.F.); (J.L.)
- Graduate School of Peking Union Medical College, Beijing 100730, China
| | - Jin Li
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Hospital/National Center of Gerontology of National Health Commission, Beijing 100730, China; (Y.Z.); (Q.-Y.W.); (Z.L.); (G.-Q.F.); (J.L.)
| | - Jian-Ping Cai
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Hospital/National Center of Gerontology of National Health Commission, Beijing 100730, China; (Y.Z.); (Q.-Y.W.); (Z.L.); (G.-Q.F.); (J.L.)
- Graduate School of Peking Union Medical College, Beijing 100730, China
- Correspondence: ; Tel.: +86-010-58115080
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Chen S, Luo J, Shen L, Liu X, Wang W, Xu J, Ren Y, Ye Y, Shi G, Cheng F, Cheng L, Su X, Dai L, Gou M, Deng H. 3D Printing Mini-Capsule Device for Islet Delivery to Treat Type 1 Diabetes. ACS APPLIED MATERIALS & INTERFACES 2022; 14:23139-23151. [PMID: 35544723 DOI: 10.1021/acsami.2c02487] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Transplantation of encapsulated islets has been shown to hold a promising potential treatment for type 1 diabetes (T1D). However, there are several obstacles to overcome, such as immune rejection by the host of the grafts, sustainability of islet function, and retrievability or replacement of the encapsulated system, hinder their clinical applications. In this study, mini-capsule devices containing islets were fabricated by using digital light processing (DLP) 3D printing. To ensure a high survival rate and low immunogenicity of the fabricated islets, 20s was selected as the most suitable printing condition. Meanwhile, the mini-capsule devices with a groove structure were fabricated to prevent islet cells leakage. Subcutaneous transplantations of encapsulated islets in immunocompetent C57BL/6 mice indicated significant improvement in the symptoms of streptozotocin-induced hyperglycemia without any immunosuppression treatment for at least 15 weeks. In vivo intraperitoneal glucose tolerance tests (IPGTT) performed at different time points demonstrated therapeutically relevant glycemic ameliorate of the device. The implants retrieved after 15 weeks still contained viable and adequate numbers of islet cells. The results of this study indicate that the proposed mini-capsule device can deliver sufficient islet cell mass, prevent islet cells leakage, and maintain long-term cell survival while allowing easy retrieval. Furthermore, the proposed encapsulated islets may help with T1D cellular treatment by overcoming the obstacles of islet transplantation.
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Affiliation(s)
- Shuang Chen
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Jing Luo
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Lanlin Shen
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Xuan Liu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Wenshuang Wang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Jia Xu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yushuang Ren
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yixin Ye
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Gang Shi
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Fuyi Cheng
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Lin Cheng
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Xiaolan Su
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Lei Dai
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Maling Gou
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Hongxin Deng
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
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50
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Guérineau NC, Campos P, Le Tissier PR, Hodson DJ, Mollard P. Cell Networks in Endocrine/Neuroendocrine Gland Function. Compr Physiol 2022; 12:3371-3415. [PMID: 35578964 DOI: 10.1002/cphy.c210031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Reproduction, growth, stress, and metabolism are determined by endocrine/neuroendocrine systems that regulate circulating hormone concentrations. All these systems generate rhythms and changes in hormone pulsatility observed in a variety of pathophysiological states. Thus, the output of endocrine/neuroendocrine systems must be regulated within a narrow window of effective hormone concentrations but must also maintain a capacity for plasticity to respond to changing physiological demands. Remarkably most endocrinologists still have a "textbook" view of endocrine gland organization which has emanated from 20th century histological studies on thin 2D tissue sections. However, 21st -century technological advances, including in-depth 3D imaging of specific cell types have vastly changed our knowledge. We now know that various levels of multicellular organization can be found across different glands, that organizational motifs can vary between species and can be modified to enhance or decrease hormonal release. This article focuses on how the organization of cells regulates hormone output using three endocrine/neuroendocrine glands that present different levels of organization and complexity: the adrenal medulla, with a single neuroendocrine cell type; the anterior pituitary, with multiple intermingled cell types; and the pancreas with multiple intermingled cell types organized into distinct functional units. We give an overview of recent methodologies that allow the study of the different components within endocrine systems, particularly their temporal and spatial relationships. We believe the emerging findings about network organization, and its impact on hormone secretion, are crucial to understanding how homeostatic regulation of endocrine axes is carried out within endocrine organs themselves. © 2022 American Physiological Society. Compr Physiol 12:3371-3415, 2022.
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Affiliation(s)
| | - Pauline Campos
- College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, UK
| | - Paul R Le Tissier
- Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, Scotland, UK
| | - David J Hodson
- Institute of Metabolism and Systems Research (IMSR), University of Birmingham, Edgbaston, UK.,Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partners, Birmingham, UK.,COMPARE University of Birmingham and University of Nottingham Midlands, UK.,Oxford Centre for Diabetes, Endocrinology and Metabolism (OCDEM), NIHR Oxford Biomedical Research Centre, Churchill Hospital, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | - Patrice Mollard
- IGF, University of Montpellier, CNRS, INSERM, Montpellier, France
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