1
|
Rönn T, Ofori JK, Perfilyev A, Hamilton A, Pircs K, Eichelmann F, Garcia-Calzon S, Karagiannopoulos A, Stenlund H, Wendt A, Volkov P, Schulze MB, Mulder H, Eliasson L, Ruhrmann S, Bacos K, Ling C. Genes with epigenetic alterations in human pancreatic islets impact mitochondrial function, insulin secretion, and type 2 diabetes. Nat Commun 2023; 14:8040. [PMID: 38086799 PMCID: PMC10716521 DOI: 10.1038/s41467-023-43719-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 11/17/2023] [Indexed: 12/18/2023] Open
Abstract
Epigenetic dysregulation may influence disease progression. Here we explore whether epigenetic alterations in human pancreatic islets impact insulin secretion and type 2 diabetes (T2D). In islets, 5,584 DNA methylation sites exhibit alterations in T2D cases versus controls and are associated with HbA1c in individuals not diagnosed with T2D. T2D-associated methylation changes are found in enhancers and regions bound by β-cell-specific transcription factors and associated with reduced expression of e.g. CABLES1, FOXP1, GABRA2, GLR1A, RHOT1, and TBC1D4. We find RHOT1 (MIRO1) to be a key regulator of insulin secretion in human islets. Rhot1-deficiency in β-cells leads to reduced insulin secretion, ATP/ADP ratio, mitochondrial mass, Ca2+, and respiration. Regulators of mitochondrial dynamics and metabolites, including L-proline, glycine, GABA, and carnitines, are altered in Rhot1-deficient β-cells. Islets from diabetic GK rats present Rhot1-deficiency. Finally, RHOT1methylation in blood is associated with future T2D. Together, individuals with T2D exhibit epigenetic alterations linked to mitochondrial dysfunction in pancreatic islets.
Collapse
Affiliation(s)
- Tina Rönn
- Department of Clinical Sciences Malmö, Lund University Diabetes Centre, Scania University Hospital, Malmö, Sweden
| | - Jones K Ofori
- Department of Clinical Sciences Malmö, Lund University Diabetes Centre, Scania University Hospital, Malmö, Sweden
| | - Alexander Perfilyev
- Department of Clinical Sciences Malmö, Lund University Diabetes Centre, Scania University Hospital, Malmö, Sweden
| | - Alexander Hamilton
- Department of Clinical Sciences Malmö, Lund University Diabetes Centre, Scania University Hospital, Malmö, Sweden
- Department of Biology, University of Copenhagen, København, Denmark
| | - Karolina Pircs
- Laboratory of Molecular Neurogenetics, Department of Experimental Medical Science, Wallenberg Neuroscience Center and Lund Stem Cell Center, Lund University, Lund, Sweden
- HCEMM-Su, Neurobiology and Neurodegenerative Diseases Research Group, Budapest, Hungary
- Institute of Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Fabian Eichelmann
- Department of Molecular Epidemiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
- German Center for Diabetes Research, München-Neuherberg, Germany
| | - Sonia Garcia-Calzon
- Department of Clinical Sciences Malmö, Lund University Diabetes Centre, Scania University Hospital, Malmö, Sweden
- Department of Food Science and Physiology, Centre for Nutrition Research, University of Navarra, Pamplona, Spain
| | - Alexandros Karagiannopoulos
- Department of Clinical Sciences Malmö, Lund University Diabetes Centre, Scania University Hospital, Malmö, Sweden
| | - Hans Stenlund
- Swedish Metabolomics Centre, Umeå University, Umeå, Sweden
| | - Anna Wendt
- Department of Clinical Sciences Malmö, Lund University Diabetes Centre, Scania University Hospital, Malmö, Sweden
| | - Petr Volkov
- Department of Clinical Sciences Malmö, Lund University Diabetes Centre, Scania University Hospital, Malmö, Sweden
| | - Matthias B Schulze
- Department of Molecular Epidemiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
- German Center for Diabetes Research, München-Neuherberg, Germany
- Institute of Nutritional Science, University of Potsdam, Nuthetal, Germany
| | - Hindrik Mulder
- Department of Clinical Sciences Malmö, Lund University Diabetes Centre, Scania University Hospital, Malmö, Sweden
| | - Lena Eliasson
- Department of Clinical Sciences Malmö, Lund University Diabetes Centre, Scania University Hospital, Malmö, Sweden
| | - Sabrina Ruhrmann
- Department of Clinical Sciences Malmö, Lund University Diabetes Centre, Scania University Hospital, Malmö, Sweden
| | - Karl Bacos
- Department of Clinical Sciences Malmö, Lund University Diabetes Centre, Scania University Hospital, Malmö, Sweden
| | - Charlotte Ling
- Department of Clinical Sciences Malmö, Lund University Diabetes Centre, Scania University Hospital, Malmö, Sweden.
| |
Collapse
|
2
|
Hou D, Zheng X, Cai D, You R, Liu J, Wang X, Liao X, Tan M, Lin L, Wang J, Zhang S, Huang H. Interleukin-6 Facilitates Acute Myeloid Leukemia Chemoresistance via Mitofusin 1-Mediated Mitochondrial Fusion. Mol Cancer Res 2023; 21:1366-1378. [PMID: 37698549 DOI: 10.1158/1541-7786.mcr-23-0382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 07/28/2023] [Accepted: 09/07/2023] [Indexed: 09/13/2023]
Abstract
Acute myeloid leukemia (AML), an aggressive hematopoietic malignancy, exhibits poor prognosis and a high recurrence rate largely because of primary and secondary drug resistance. Elevated serum IL6 levels have been observed in patients with AML and are associated with chemoresistance. Chemoresistant AML cells are highly dependent on oxidative phosphorylation (OXPHOS), and mitochondrial network remodeling is essential for mitochondrial function. However, IL6-mediated regulation of mitochondrial remodeling and its effectiveness as a therapeutic target remain unclear. We aimed to determine the mechanisms through which IL6 facilitates the development of chemoresistance in AML cells. IL6 upregulated mitofusin 1 (MFN1)-mediated mitochondrial fusion, promoted OXPHOS, and induced chemoresistance in AML cells. MFN1 knockdown impaired the effects of IL6 on mitochondrial function and chemoresistance in AML cells. In an MLL::AF9 fusion gene-induced AML mouse model, IL6 reduced chemosensitivity to cytarabine (Ara-C), a commonly used antileukemia drug, accompanied by increased MFN1 expression, mitochondrial fusion, and OXPHOS status. In contrast, anti-IL6 antibodies downregulated MFN1 expression, suppressed mitochondrial fusion and OXPHOS, enhanced the curative effects of Ara-C, and prolonged overall survival. In conclusion, IL6 upregulated MFN1-mediated mitochondrial fusion in AML, which facilitated mitochondrial respiration, in turn, inducing chemoresistance. Thus, targeting IL6 may have therapeutic implications in overcoming IL6-mediated chemoresistance in AML. IMPLICATIONS IL6 treatment induces MFN1-mediated mitochondrial fusion, promotes OXPHOS, and confers chemoresistance in AML cells. Targeting IL6 regulation in mitochondria is a promising therapeutic strategy to enhance the chemosensitivity of AML.
Collapse
Affiliation(s)
- Diyu Hou
- Central Laboratory, Fujian Medical University Union Hospital, Fuzhou, China
| | - Xiaoming Zheng
- Central Laboratory, Fujian Medical University Union Hospital, Fuzhou, China
| | - Danni Cai
- Central Laboratory, Fujian Medical University Union Hospital, Fuzhou, China
| | - Ruolan You
- Central Laboratory, Fujian Medical University Union Hospital, Fuzhou, China
| | - Jingru Liu
- Central Laboratory, Fujian Medical University Union Hospital, Fuzhou, China
| | - Xiaoting Wang
- Central Laboratory, Fujian Medical University Union Hospital, Fuzhou, China
| | - Xinai Liao
- Central Laboratory, Fujian Medical University Union Hospital, Fuzhou, China
| | - Maoqing Tan
- Central Laboratory, Fujian Medical University Union Hospital, Fuzhou, China
| | - Liyan Lin
- Central Laboratory, Fujian Medical University Union Hospital, Fuzhou, China
| | - Jin Wang
- Central Laboratory, Fujian Medical University Union Hospital, Fuzhou, China
| | - Shuxia Zhang
- Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Huifang Huang
- Central Laboratory, Fujian Medical University Union Hospital, Fuzhou, China
| |
Collapse
|
3
|
Lodde V, Floris M, Zoroddu E, Zarbo IR, Idda ML. RNA-binding proteins in autoimmunity: From genetics to molecular biology. WILEY INTERDISCIPLINARY REVIEWS. RNA 2023; 14:e1772. [PMID: 36658783 DOI: 10.1002/wrna.1772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 11/18/2022] [Accepted: 12/05/2022] [Indexed: 01/21/2023]
Abstract
Autoimmune diseases (ADs) are chronic pathologies generated by the loss of immune tolerance to the body's own cells and tissues. There is growing recognition that RNA-binding proteins (RBPs) critically govern immunity in healthy and pathological conditions by modulating gene expression post-transcriptionally at all levels: nuclear mRNA splicing and modification, export to the cytoplasm, as well as cytoplasmic mRNA transport, storage, editing, stability, and translation. Despite enormous efforts to identify new therapies for ADs, definitive solutions are not yet available in many instances. Recognizing that many ADs have a strong genetic component, we have explored connections between the molecular biology and the genetics of RBPs in ADs. Here, we review the genetics and molecular biology of RBPs in four major ADs, multiple sclerosis (MS), type 1 diabetes mellitus (T1D), systemic lupus erythematosus (SLE), and rheumatoid arthritis (RA). We anticipate that gaining insights into the genetics and biology of ADs can facilitate the discovery of new therapies. This article is categorized under: RNA in Disease and Development > RNA in Disease.
Collapse
Affiliation(s)
- Valeria Lodde
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Matteo Floris
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Enrico Zoroddu
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Ignazio Roberto Zarbo
- Department of Medical, Surgical and Experimental Sciences, University of Sassari - Neurology Unit Azienza Ospedaliera Universitaria (AOU), Sassari, Italy
| | - Maria Laura Idda
- Institute for Genetic and Biomedical Research - National Research Council (IRGB-CNR), Sassari, Italy
| |
Collapse
|
4
|
Li L, Wang W, Xu Q, Huang M. Asiatic acid improves insulin secretion of β cells in type 2 diabetes through TNF- α/Mfn2 pathway. Zhejiang Da Xue Xue Bao Yi Xue Ban 2023; 52:185-194. [PMID: 37283103 PMCID: PMC10409975 DOI: 10.3724/zdxbyxb-2022-0647] [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: 11/17/2022] [Accepted: 01/10/2023] [Indexed: 06/08/2023]
Abstract
OBJECTIVES To investigate the effects and molecular mechanisms of asiatic acid on β-cell function in type 2 diabetes mellitus (T2DM). METHODS The T2DM model was established by high fat diet and streptozotocin injection in ICR mice, and the effects of asiatic acid on glucose regulation were investigated in model mice. The islets were isolated from palmitic acid-treated diabetic mice. ELISA was used to detect the glucose-stimulated insulin secretion, tumor necrosis factor (TNF)-α and interleukin (IL)-6. ATP assay was applied to measure ATP production, and Western blotting was used to detect protein expression of mature β cell marker urocortin (Ucn) 3 and mitofusin (Mfn) 2. The regulatory effects of asiatic acid on glucose-stimulated insulin secretion (GSIS) and Ucn3 expression were also investigated after siRNA interference with Mfn2 or treatment with TNF-α. RESULTS Asiatic acid with the dose of 25 mg·kg-1·d-1 had the best glycemic control in T2DM mice and improved the homeostasis model assessment β index. Asiatic acid increased the expression of Mfn2 and Ucn3 protein and improved the GSIS function of diabetic β cells in vitro and in vivo (both P<0.05). Moreover, it improved the ATP production of islets of T2DM mice in vitro (P<0.05). Interfering Mfn2 with siRNA blocked the up-regulation of Ucn3 and GSIS induced by asiatic acid. Asiatic acid inhibited islet TNF-α content and increased Mfn2 and Ucn3 protein expression inhibited by TNF-α. CONCLUSIONS Asiatic acid improves β cell insulin secretion function in T2DM mice by maintaining the β cell maturity, which may be related to the TNF-α/Mfn2 pathway.
Collapse
Affiliation(s)
- Lu Li
- Department of Clinical Pharmacy, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China.
| | - Wei Wang
- Intensive Critical Care Unit, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Qiang Xu
- Department of Clinical Pharmacy, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Mingzhu Huang
- Department of Clinical Pharmacy, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China.
| |
Collapse
|
5
|
Al-Ghamdi BA, Al-Shamrani JM, El-Shehawi AM, Al-Johani I, Al-Otaibi BG. Role of mitochondrial DNA in diabetes Mellitus Type I and Type II. Saudi J Biol Sci 2022; 29:103434. [PMID: 36187456 PMCID: PMC9523097 DOI: 10.1016/j.sjbs.2022.103434] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 08/01/2022] [Accepted: 09/01/2022] [Indexed: 12/04/2022] Open
Abstract
Morbidity and mortality from diabetes mellitus and associated illnesses is a major problem across the globe. Anti-diabetic medicines must be improved despite existing breakthroughs in treatment approaches. Diabetes has been linked to mitochondrial dysfunction. As a result, particular mitochondrial diabetes kinds like MIDD (maternally inherited diabetes & deafness) and DAD (diabetic autonomic dysfunction) have been identified and studied (diabetes and Deafness). Some mutations as in mitochondrial DNA (mtDNA), that encodes for a significant portion of mitochondrial proteins as well as mitochondrial tRNA essential for mitochondrial protein biosynthesis, are responsible for hereditary mitochondrial diseases. Tissue-specificity and heteroplasmy have a role in the harmful phenotype of mtDNA mutations, making it difficult to generalise findings from one study to another. There are a huge increase in the number for mtDNA mutations related with human illnesses that have been identified using current sequencing technologies. In this study, we make a list on mtDNA mutations linked with diseases and diabetic illnesses and explore the methods by which they contribute to the pathology's emergence.
Collapse
Affiliation(s)
- Bandar Ali Al-Ghamdi
- Department of Cardiology and Cardiac Surgery, King Fahad Armed Forces Hospital, Jeddah, Saudi Arabia.,Department of Biotechnology, Taif University, Taif City, Saudi Arabia
| | | | | | - Intisar Al-Johani
- Department of Biotechnology, Taif University, Taif City, Saudi Arabia
| | | |
Collapse
|
6
|
Chen C, Zhou Q, Li Z, Duan H, Liu Y, Wan L, Wang H, Xie L. Hyperglycemia induces corneal endothelial dysfunction through attenuating mitophagy. Exp Eye Res 2021; 215:108903. [PMID: 34951999 DOI: 10.1016/j.exer.2021.108903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 12/08/2021] [Accepted: 12/18/2021] [Indexed: 12/20/2022]
Abstract
Hyperglycemia increases the risk of corneal endothelial dysfunction, resulting in damage to corneal endothelial structure and function. However, the effect and mechanism of hyperglycemia-induced corneal endothelial damage remain elusive. In this study, we demonstrated that hyperglycemia reduced the expression of pump-related protein Na+/K+ ATPase and barrier-related protein ZO-1. Moreover, we found hyperglycemia caused abnormal changes of morphological mitochondria and dynamics in vitro. In addition, the decreased levels of mitophagy were further confirmed Western blotting and LC3B-Mitotracker Immunofluorescence. Exogenous application of mitophagy agonist carbonyl cyanide m-chlorophenyl hydrazine (CCCP) increases the expression of Na+/K+ ATPase and ZO-1 in corneal endothelial cells through up-regulated mitophagy in vitro. In addition, CCCP effectively reverses the phenomenon of corneal opacity and increased corneal thickness in diabetic mice. Therefore, our demonstrated the novel function of mitophagy in the pathogenesis of diabetic cornea endothelial dysfunction, and provide potential approach for treating diabetic corneal endothelial dysfunction.
Collapse
Affiliation(s)
- Chen Chen
- Department of Ophthalmology, Clinical Medical College of Shandong University, Jinan, 250012, China; State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, 266071, China
| | - Qingjun Zhou
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, 266071, China; Qingdao Eye Hospital of Shandong First Medical University, Qingdao, 266071, China
| | - Zongyi Li
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, 266071, China; Qingdao Eye Hospital of Shandong First Medical University, Qingdao, 266071, China
| | - Haoyun Duan
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, 266071, China; Qingdao Eye Hospital of Shandong First Medical University, Qingdao, 266071, China
| | - Yameng Liu
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, 266071, China
| | - Luqin Wan
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, 266071, China
| | - Huifeng Wang
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, 266071, China
| | - Lixin Xie
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, 266071, China; Qingdao Eye Hospital of Shandong First Medical University, Qingdao, 266071, China.
| |
Collapse
|
7
|
Sphingosine-1 Phosphate Lyase Regulates Sensitivity of Pancreatic Beta-Cells to Lipotoxicity. Int J Mol Sci 2021; 22:ijms221910893. [PMID: 34639233 PMCID: PMC8509761 DOI: 10.3390/ijms221910893] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/28/2021] [Accepted: 10/04/2021] [Indexed: 12/29/2022] Open
Abstract
Elevated levels of free fatty acids (FFAs) have been related to pancreatic beta-cell failure in type 2 diabetes (T2DM), though the underlying mechanisms are not yet fully understood. FFAs have been shown to dysregulate formation of bioactive sphingolipids, such as ceramides and sphingosine-1 phosphate (S1P) in beta-cells. The aim of this study was to analyze the role of sphingosine-1 phosphate lyase (SPL), a key enzyme of the sphingolipid pathway that catalyzes an irreversible degradation of S1P, in the sensitivity of beta-cells to lipotoxicity. To validate the role of SPL in lipotoxicity, we modulated SPL expression in rat INS1E cells and in human EndoC-βH1 beta-cells. SPL overexpression in INS1E cells (INS1E-SPL), which are characterized by a moderate basal expression level of SPL, resulted in an acceleration of palmitate-mediated cell viability loss, proliferation inhibition and induction of oxidative stress. SPL overexpression affected the mRNA expression of ER stress markers and mitochondrial chaperones. In contrast to control cells, in INS1E-SPL cells no protective effect of oleate was detected. Moreover, Plin2 expression and lipid droplet formation were strongly reduced in OA-treated INS1E-SPL cells. Silencing of SPL in human EndoC-βH1 beta-cells, which are characterized by a significantly higher SPL expression as compared to rodent beta-cells, resulted in prevention of FFA-mediated caspase-3/7 activation. Our findings indicate that an adequate control of S1P degradation by SPL might be crucially involved in the susceptibility of pancreatic beta-cells to lipotoxicity.
Collapse
|
8
|
Chiu YH, Lin SCA, Kuo CH, Li CJ. Molecular Machinery and Pathophysiology of Mitochondrial Dynamics. Front Cell Dev Biol 2021; 9:743892. [PMID: 34604240 PMCID: PMC8484900 DOI: 10.3389/fcell.2021.743892] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 08/31/2021] [Indexed: 01/28/2023] Open
Abstract
Mitochondria are double-membraned organelles that exhibit fluidity. They are the main site of cellular aerobic respiration, providing energy for cell proliferation, migration, and survival; hence, they are called "powerhouses." Mitochondria play an important role in biological processes such as cell death, cell senescence, autophagy, lipid synthesis, calcium homeostasis, and iron balance. Fission and fusion are active processes that require many specialized proteins, including mechanical enzymes that physically alter mitochondrial membranes, and interface proteins that regulate the interaction of these mechanical proteins with organelles. This review discusses the molecular mechanisms of mitochondrial fusion, fission, and physiopathology, emphasizing the biological significance of mitochondrial morphology and dynamics. In particular, the regulatory mechanisms of mitochondria-related genes and proteins in animal cells are discussed, as well as research trends in mitochondrial dynamics, providing a theoretical reference for future mitochondrial research.
Collapse
Affiliation(s)
- Yi-Han Chiu
- Department of Microbiology, Soochow University, Taipei, Taiwan
| | - Shu-Chuan Amy Lin
- Department of Nursing, National Yang Ming Chiao Tung University Hospital, Yilan, Taiwan
- School of Nursing, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Chen-Hsin Kuo
- Department of Obstetrics and Gynecology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Chia-Jung Li
- Department of Obstetrics and Gynecology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
- Institute of BioPharmaceutical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| |
Collapse
|
9
|
Valdés-Aguayo JJ, Garza-Veloz I, Badillo-Almaráz JI, Bernal-Silva S, Martínez-Vázquez MC, Juárez-Alcalá V, Vargas-Rodríguez JR, Gaeta-Velasco ML, González-Fuentes C, Ávila-Carrasco L, Martinez-Fierro ML. Mitochondria and Mitochondrial DNA: Key Elements in the Pathogenesis and Exacerbation of the Inflammatory State Caused by COVID-19. ACTA ACUST UNITED AC 2021; 57:medicina57090928. [PMID: 34577851 PMCID: PMC8471487 DOI: 10.3390/medicina57090928] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/21/2021] [Accepted: 09/01/2021] [Indexed: 12/15/2022]
Abstract
Background and Objectives. The importance of mitochondria in inflammatory pathologies, besides providing energy, is associated with the release of mitochondrial damage products, such as mitochondrial DNA (mt-DNA), which may perpetuate inflammation. In this review, we aimed to show the importance of mitochondria, as organelles that produce energy and intervene in multiple pathologies, focusing mainly in COVID-19 and using multiple molecular mechanisms that allow for the replication and maintenance of the viral genome, leading to the exacerbation and spread of the inflammatory response. The evidence suggests that mitochondria are implicated in the replication of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which forms double-membrane vesicles and evades detection by the cell defense system. These mitochondrion-hijacking vesicles damage the integrity of the mitochondrion’s membrane, releasing mt-DNA into circulation and triggering the activation of innate immunity, which may contribute to an exacerbation of the pro-inflammatory state. Conclusions. While mitochondrial dysfunction in COVID-19 continues to be studied, the use of mt-DNA as an indicator of prognosis and severity is a potential area yet to be explored.
Collapse
Affiliation(s)
- José J. Valdés-Aguayo
- Molecular Medicine Laboratory, Unidad Académica de Medicina Humana y C.S., Universidad Autónoma de Zacatecas, Carretera Zacatecas-Guadalajara Km.6. Ejido la Escondida, Zacatecas 98160, Mexico; (J.J.V.-A.); (I.G.-V.); (J.I.B.-A.); (M.C.M.-V.); (V.J.-A.); (J.R.V.-R.); (L.Á.-C.)
| | - Idalia Garza-Veloz
- Molecular Medicine Laboratory, Unidad Académica de Medicina Humana y C.S., Universidad Autónoma de Zacatecas, Carretera Zacatecas-Guadalajara Km.6. Ejido la Escondida, Zacatecas 98160, Mexico; (J.J.V.-A.); (I.G.-V.); (J.I.B.-A.); (M.C.M.-V.); (V.J.-A.); (J.R.V.-R.); (L.Á.-C.)
| | - José I. Badillo-Almaráz
- Molecular Medicine Laboratory, Unidad Académica de Medicina Humana y C.S., Universidad Autónoma de Zacatecas, Carretera Zacatecas-Guadalajara Km.6. Ejido la Escondida, Zacatecas 98160, Mexico; (J.J.V.-A.); (I.G.-V.); (J.I.B.-A.); (M.C.M.-V.); (V.J.-A.); (J.R.V.-R.); (L.Á.-C.)
| | - Sofia Bernal-Silva
- Microbiology Department, Facultad de Medicina, Universidad Autónoma de San Luis Potosí, Avenida Venustiano Carranza 2405, San Luis Potosí 78210, Mexico;
| | - Maria C. Martínez-Vázquez
- Molecular Medicine Laboratory, Unidad Académica de Medicina Humana y C.S., Universidad Autónoma de Zacatecas, Carretera Zacatecas-Guadalajara Km.6. Ejido la Escondida, Zacatecas 98160, Mexico; (J.J.V.-A.); (I.G.-V.); (J.I.B.-A.); (M.C.M.-V.); (V.J.-A.); (J.R.V.-R.); (L.Á.-C.)
| | - Vladimir Juárez-Alcalá
- Molecular Medicine Laboratory, Unidad Académica de Medicina Humana y C.S., Universidad Autónoma de Zacatecas, Carretera Zacatecas-Guadalajara Km.6. Ejido la Escondida, Zacatecas 98160, Mexico; (J.J.V.-A.); (I.G.-V.); (J.I.B.-A.); (M.C.M.-V.); (V.J.-A.); (J.R.V.-R.); (L.Á.-C.)
| | - José R. Vargas-Rodríguez
- Molecular Medicine Laboratory, Unidad Académica de Medicina Humana y C.S., Universidad Autónoma de Zacatecas, Carretera Zacatecas-Guadalajara Km.6. Ejido la Escondida, Zacatecas 98160, Mexico; (J.J.V.-A.); (I.G.-V.); (J.I.B.-A.); (M.C.M.-V.); (V.J.-A.); (J.R.V.-R.); (L.Á.-C.)
| | - María L. Gaeta-Velasco
- Hospital General de Zacatecas “Luz González Cosío”, Circuito Ciudad Gobierno 410, Col. Ciudad Gobierno, Zacatecas 98160, Mexico; (M.L.G.-V.); (C.G.-F.)
| | - Carolina González-Fuentes
- Hospital General de Zacatecas “Luz González Cosío”, Circuito Ciudad Gobierno 410, Col. Ciudad Gobierno, Zacatecas 98160, Mexico; (M.L.G.-V.); (C.G.-F.)
| | - Lorena Ávila-Carrasco
- Molecular Medicine Laboratory, Unidad Académica de Medicina Humana y C.S., Universidad Autónoma de Zacatecas, Carretera Zacatecas-Guadalajara Km.6. Ejido la Escondida, Zacatecas 98160, Mexico; (J.J.V.-A.); (I.G.-V.); (J.I.B.-A.); (M.C.M.-V.); (V.J.-A.); (J.R.V.-R.); (L.Á.-C.)
| | - Margarita L. Martinez-Fierro
- Molecular Medicine Laboratory, Unidad Académica de Medicina Humana y C.S., Universidad Autónoma de Zacatecas, Carretera Zacatecas-Guadalajara Km.6. Ejido la Escondida, Zacatecas 98160, Mexico; (J.J.V.-A.); (I.G.-V.); (J.I.B.-A.); (M.C.M.-V.); (V.J.-A.); (J.R.V.-R.); (L.Á.-C.)
- Correspondence: ; Tel.: +52-(492)-925669 (ext. 4511)
| |
Collapse
|
10
|
The Role of Mitochondrial Mutations and Chronic Inflammation in Diabetes. Int J Mol Sci 2021; 22:ijms22136733. [PMID: 34201756 PMCID: PMC8268113 DOI: 10.3390/ijms22136733] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 06/16/2021] [Accepted: 06/19/2021] [Indexed: 02/07/2023] Open
Abstract
Diabetes mellitus and related disorders significantly contribute to morbidity and mortality worldwide. Despite the advances in the current therapeutic methods, further development of anti-diabetic therapies is necessary. Mitochondrial dysfunction is known to be implicated in diabetes development. Moreover, specific types of mitochondrial diabetes have been discovered, such as MIDD (maternally inherited diabetes and deafness) and DAD (diabetes and Deafness). Hereditary mitochondrial disorders are caused by certain mutations in the mitochondrial DNA (mtDNA), which encodes for a substantial part of mitochondrial proteins and mitochondrial tRNA necessary for mitochondrial protein synthesis. Study of mtDNA mutations is challenging because the pathogenic phenotype associated with such mutations depends on the level of its heteroplasmy (proportion of mtDNA copies carrying the mutation) and can be tissue-specific. Nevertheless, modern sequencing methods have allowed describing and characterizing a number of mtDNA mutations associated with human disorders, and the list is constantly growing. In this review, we provide a list of mtDNA mutations associated with diabetes and related disorders and discuss the mechanisms of their involvement in the pathology development.
Collapse
|
11
|
Erchova I, Sun S, Votruba M. A Perspective on Accelerated Aging Caused by the Genetic Deficiency of the Metabolic Protein, OPA1. Front Neurol 2021; 12:641259. [PMID: 33927681 PMCID: PMC8076550 DOI: 10.3389/fneur.2021.641259] [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: 12/13/2020] [Accepted: 03/19/2021] [Indexed: 11/21/2022] Open
Abstract
Autosomal Dominant Optic Atrophy (ADOA) is an ophthalmological condition associated primarily with mutations in the OPA1 gene. It has variable onset, sometimes juvenile, but in other patients, the disease does not manifest until adult middle age despite the presence of a pathological mutation. Thus, individuals carrying mutations are considered healthy before the onset of clinical symptoms. Our research, nonetheless, indicates that on the cellular level pathology is evident from birth and mutant cells are different from controls. We argue that the adaptation and early recruitment of cytoprotective responses allows normal development and functioning but leads to an exhaustion of cellular reserves, leading to premature cellular aging, especially in neurons and skeletal muscle cells. The appearance of clinical symptoms, thus, indicates the overwhelming of natural cellular defenses and break-down of native protective mechanisms.
Collapse
Affiliation(s)
- Irina Erchova
- Mitochondria and Vision Lab, School of Optometry and Vision Sciences, Cardiff University, Cardiff, United Kingdom
| | - Shanshan Sun
- Mitochondria and Vision Lab, School of Optometry and Vision Sciences, Cardiff University, Cardiff, United Kingdom
| | - Marcela Votruba
- Mitochondria and Vision Lab, School of Optometry and Vision Sciences, Cardiff University, Cardiff, United Kingdom.,Cardiff Eye Unit, University Hospital of Wales, Cardiff, United Kingdom
| |
Collapse
|
12
|
Huo S, Shi W, Ma H, Yan D, Luo P, Guo J, Li C, Lin J, Zhang C, Li S, Lv J, Lin L. Alleviation of Inflammation and Oxidative Stress in Pressure Overload-Induced Cardiac Remodeling and Heart Failure via IL-6/STAT3 Inhibition by Raloxifene. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:6699054. [PMID: 33824698 PMCID: PMC8007383 DOI: 10.1155/2021/6699054] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 02/07/2021] [Accepted: 02/13/2021] [Indexed: 12/16/2022]
Abstract
BACKGROUND Inflammation and oxidative stress are involved in the initiation and progress of heart failure (HF). However, the role of the IL6/STAT3 pathway in the pressure overload-induced HF remains controversial. METHODS AND RESULTS Transverse aortic constriction (TAC) was used to induce pressure overload-HF in C57BL/6J mice. 18 mice were randomized into three groups (Sham, TAC, and TAC+raloxifene, n = 6, respectively). Echocardiographic and histological results showed that cardiac hypertrophy, fibrosis, and left ventricular dysfunction were manifested in mice after TAC treatment of eight weeks, with aggravation of macrophage infiltration and interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α) expression in the myocardium. TAC (four and eight weeks) elevated the phosphorylation of signal transducer and activator of transcription 3 (p-STAT3) and prohibitin2 (PHB2) protein expression. Importantly, IL-6/gp130/STAT3 inhibition by raloxifene alleviated TAC-induced myocardial inflammation, cardiac remodeling, and dysfunction. In vitro, we demonstrated cellular hypertrophy with STAT3 activation and oxidative stress exacerbation could be elicited by IL-6 (25 ng/mL, 48 h) in H9c2 myoblasts. Sustained IL-6 stimulation increased intracellular reactive oxygen species, repressed mitochondrial membrane potential (MMP), decreased intracellular content of ATP, and led to decreased SOD activity, an increase in iNOS protein expression, and increased protein expression of Pink1, Parkin, and Bnip3 involving in mitophagy, all of which were reversed by raloxifene. CONCLUSION Inflammation and IL-6/STAT3 signaling were activated in TAC-induced HF in mice, while sustained IL-6 incubation elicited oxidative stress and mitophagy-related protein increase in H9c2 myoblasts, all of which were inhibited by raloxifene. These indicated IL-6/STAT3 signaling might be involved in the pathogenesis of myocardial hypertrophy and HF.
Collapse
Affiliation(s)
- Shengqi Huo
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Shi
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Haiyan Ma
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Division of Cardiology, Department of Internal Medicine, First People's Hospital of Shangqiu, Shangqiu, China
| | - Dan Yan
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Pengcheng Luo
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Junyi Guo
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chenglong Li
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville FL, USA
| | - Jiayuh Lin
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore MD, USA
| | - Cuntai Zhang
- Department of Geriatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Sheng Li
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jiagao Lv
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Li Lin
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| |
Collapse
|
13
|
Eguchi N, Vaziri ND, Dafoe DC, Ichii H. The Role of Oxidative Stress in Pancreatic β Cell Dysfunction in Diabetes. Int J Mol Sci 2021; 22:ijms22041509. [PMID: 33546200 PMCID: PMC7913369 DOI: 10.3390/ijms22041509] [Citation(s) in RCA: 118] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/29/2021] [Accepted: 01/30/2021] [Indexed: 02/07/2023] Open
Abstract
Diabetes is a chronic metabolic disorder characterized by inappropriately elevated glucose levels as a result of impaired pancreatic β cell function and insulin resistance. Extensive studies have been conducted to elucidate the mechanism involved in the development of β cell failure and death under diabetic conditions such as hyperglycemia, hyperlipidemia, and inflammation. Of the plethora of proposed mechanisms, endoplasmic reticulum (ER) stress, mitochondrial dysfunction, and oxidative stress have been shown to play a central role in promoting β cell dysfunction. It has become more evident in recent years that these 3 factors are closely interrelated and importantly aggravate each other. Oxidative stress in particular is of great interest to β cell health and survival as it has been shown that β cells exhibit lower antioxidative capacity. Therefore, this review will focus on discussing factors that contribute to the development of oxidative stress in pancreatic β cells and explore the downstream effects of oxidative stress on β cell function and health. Furthermore, antioxidative capacity of β cells to counteract these effects will be discussed along with new approaches focused on preserving β cells under oxidative conditions.
Collapse
Affiliation(s)
- Natsuki Eguchi
- Department of Surgery, University of California, Irvine, CA 92697, USA; (N.E.); (D.C.D.)
| | | | - Donald C. Dafoe
- Department of Surgery, University of California, Irvine, CA 92697, USA; (N.E.); (D.C.D.)
| | - Hirohito Ichii
- Department of Surgery, University of California, Irvine, CA 92697, USA; (N.E.); (D.C.D.)
- Correspondence: ; Tel.: +1-714-456-8590
| |
Collapse
|
14
|
Xiang H, Song R, Ouyang J, Zhu R, Shu Z, Liu Y, Wang X, Zhang D, Zhao J, Lu H. Organelle dynamics of endothelial mitochondria in diabetic angiopathy. Eur J Pharmacol 2021; 895:173865. [PMID: 33460616 DOI: 10.1016/j.ejphar.2021.173865] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 12/22/2020] [Accepted: 01/11/2021] [Indexed: 12/19/2022]
Abstract
Diabetes, a chronic non-communicable disease, has become one of the most serious and critical public health problems with increasing incidence trends. Chronic vascular complications are the major causes of disability and death in diabetic patients with endothelial dysfunction. Diabetes is intimately associated with endothelial mitochondrial dysfunction, indicated by increased oxidative stress, decreased biogenesis, increased DNA damage, and weakened autophagy in mitochondria. All these morphological and functional changes of mitochondria play important roles in diabetic endothelial dysfunction. Herein, we reviewed the roles and mechanisms of endothelial mitochondrial dysfunction, particularly mitochondrial dynamics in the vascular complications of diabetes and summarized the potential mitochondria-targeted therapies in diabetic vascular complications.
Collapse
Affiliation(s)
- Hong Xiang
- Center for Experimental Medical Research, the Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, China
| | - Ruipeng Song
- Department of Endocrinology, The Third People's Provincial Hospital of Henan Province, Zhengzhou, 450000, Henan, China
| | - Jie Ouyang
- Department of Cardiology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, China
| | - Ruifang Zhu
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Zhihao Shu
- Department of Cardiology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, China
| | - Yulan Liu
- Department of Cardiology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, China
| | - Xuewen Wang
- Department of Cardiology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, China
| | - Dongtao Zhang
- Department of Geriatrics, Tongxu Hospital of Traditional Chinese Medicine, Kaifeng, Henan, 475400, China
| | - Jiangwei Zhao
- Department of Internal Medicine 3, People's Hospital of Weihui, Xinxiang, Henan, 453100, China
| | - Hongwei Lu
- Center for Experimental Medical Research, the Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, China.
| |
Collapse
|
15
|
Good Cop, Bad Cop: The Opposing Effects of Macrophage Activation State on Maintaining or Damaging Functional β-Cell Mass. Metabolites 2020; 10:metabo10120485. [PMID: 33256225 PMCID: PMC7761161 DOI: 10.3390/metabo10120485] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/18/2020] [Accepted: 11/24/2020] [Indexed: 12/16/2022] Open
Abstract
Loss of functional β-cell mass is a hallmark of Type 1 and Type 2 Diabetes. Macrophages play an integral role in the maintenance or destruction of pancreatic β-cells. The effect of the macrophage β-cell interaction is dependent on the activation state of the macrophage. Macrophages can be activated across a spectrum, from pro-inflammatory to anti-inflammatory and tissue remodeling. The factors secreted by these differentially activated macrophages and their effect on β-cells define the effect on functional β-cell mass. In this review, the spectrum of macrophage activation is discussed, as are the positive and negative effects on β-cell survival, expansion, and function as well as the defined factors released from macrophages that impinge on functional β-cell mass.
Collapse
|
16
|
Moss ND, Sussel L. mRNA Processing: An Emerging Frontier in the Regulation of Pancreatic β Cell Function. Front Genet 2020; 11:983. [PMID: 33088281 PMCID: PMC7490333 DOI: 10.3389/fgene.2020.00983] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 08/03/2020] [Indexed: 01/04/2023] Open
Abstract
Robust endocrine cell function, particularly β cell function, is required to maintain blood glucose homeostasis. Diabetes can result from the loss or dysfunction of β cells. Despite decades of clinical and basic research, the precise regulation of β cell function and pathogenesis in diabetes remains incompletely understood. In this review, we highlight RNA processing of mRNAs as a rapidly emerging mechanism regulating β cell function and survival. RNA-binding proteins (RBPs) and RNA modifications are primed to be the next frontier to explain many of the poorly understood molecular processes that regulate β cell formation and function, and provide an exciting potential for the development of novel therapeutics. Here we outline the current understanding of β cell specific functions of several characterized RBPs, alternative splicing events, and transcriptome wide changes in RNA methylation. We also highlight several RBPs that are dysregulated in both Type 1 and Type 2 diabetes, and discuss remaining knowledge gaps in the field.
Collapse
Affiliation(s)
- Nicole D Moss
- Cell, Stem Cells, and Development Graduate Program, Department of Pediatrics, Barbara Davis Center, University of Colorado Denver Anschutz Medical Campus, Aurora, CO, United States
| | - Lori Sussel
- Cell, Stem Cells, and Development Graduate Program, Department of Pediatrics, Barbara Davis Center, University of Colorado Denver Anschutz Medical Campus, Aurora, CO, United States
| |
Collapse
|
17
|
Hong Y, Tak H, Kim C, Kang H, Ji E, Ahn S, Jung M, Kim HL, Lee JH, Kim W, Lee EK. RNA binding protein HuD contributes to β-cell dysfunction by impairing mitochondria dynamics. Cell Death Differ 2020; 27:1633-1643. [PMID: 31659282 PMCID: PMC7206106 DOI: 10.1038/s41418-019-0447-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 10/16/2019] [Accepted: 10/17/2019] [Indexed: 02/06/2023] Open
Abstract
Imbalanced mitochondrial dynamics in pancreatic β-cells contributes to β-cell dysfunction in diabetes; however, the molecular mechanisms underlying mitochondrial dynamics in the pathology of diabetes are not fully elucidated. We previously reported the reduction of RNA binding protein HuD in pancreatic β-cells of diabetes. Herein, we demonstrate that HuD plays a novel role in the regulation of mitochondrial dynamics by promoting mitochondrial fusion. We show enhanced mitochondrial fragmentation in the pancreas of db/db mice and HuD KO mice. Downregulation of HuD increases the number of cells with fragmented mitochondria and reduces the mitochondrial activity determined by mitochondrial membrane potential and ATP production in mouse insulinoma βTC6 cells. HuD binds to 3'-untraslated region of mitofusin 2 (Mfn2) mRNA and positively regulates its expression. Ectopic expression of Mfn2 in βTC6 cells stably expressing short hairpin RNA against HuD (shHuD) restores HuD-mediated mitochondrial dysfunction. Taken together, our results suggest that HuD regulates mitochondrial dynamics by regulating Mfn2 level and its reduced expression leads to mitochondrial dysfunction in pancreatic β-cells.
Collapse
Affiliation(s)
- Youlim Hong
- Department of Biochemistry, The Catholic University of Korea College of Medicine, Seoul, 06591, South Korea
| | - Hyosun Tak
- Department of Biochemistry, The Catholic University of Korea College of Medicine, Seoul, 06591, South Korea
| | - Chongtae Kim
- Department of Biochemistry, The Catholic University of Korea College of Medicine, Seoul, 06591, South Korea
- Catholic Institute for Visual Science, The Catholic University of Korea College of Medicine, Seoul, 06591, South Korea
| | - Hoin Kang
- Department of Biochemistry, The Catholic University of Korea College of Medicine, Seoul, 06591, South Korea
| | - Eunbyul Ji
- Department of Biochemistry, The Catholic University of Korea College of Medicine, Seoul, 06591, South Korea
| | - Sojin Ahn
- Department of Biochemistry, The Catholic University of Korea College of Medicine, Seoul, 06591, South Korea
| | - Myeongwoo Jung
- Department of Biochemistry, The Catholic University of Korea College of Medicine, Seoul, 06591, South Korea
| | - Hong Lim Kim
- Integrative Research Support Center, Laboratory of Electron Microscope, The Catholic University of Korea College of Medicine, Seoul, 06591, South Korea
| | - Jeong-Hwa Lee
- Department of Biochemistry, The Catholic University of Korea College of Medicine, Seoul, 06591, South Korea
- Institute of Aging and Metabolic Diseases, The Catholic University of Korea College of Medicine, Seoul, 06591, South Korea
| | - Wook Kim
- Department of Molecular Science and Technology, Ajou University, Suwon, 16499, South Korea
| | - Eun Kyung Lee
- Department of Biochemistry, The Catholic University of Korea College of Medicine, Seoul, 06591, South Korea.
- Institute of Aging and Metabolic Diseases, The Catholic University of Korea College of Medicine, Seoul, 06591, South Korea.
| |
Collapse
|
18
|
Goldstein AS, Janson BJ, Skeie JM, Ling JJ, Greiner MA. The effects of diabetes mellitus on the corneal endothelium: A review. Surv Ophthalmol 2020; 65:438-450. [PMID: 31926185 DOI: 10.1016/j.survophthal.2019.12.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 12/24/2019] [Accepted: 12/30/2019] [Indexed: 12/19/2022]
Abstract
The corneal endothelium plays a critical role in maintaining corneal clarity. There is an expected decline in cell density with age and disease, and maintaining the health of this cell layer is important as corneal endothelial cells generally are amitotic in vivo. Diabetes mellitus is a highly prevalent disease that damages the corneal endothelium. Diabetes causes structural and functional impairments in the corneal endothelium that decrease cellular reserve in response to stress. These effects have implications to consider for diabetic patients undergoing anterior segment surgery, and for corneal surgeons who use diabetic donor tissue and treat diabetic patients. In this review, we discuss the specifics of how diabetes mellitus impacts the corneal endothelium including alterations in cell morphology, cell density, ultrastructure, pump and barrier function, cataract surgery outcomes, and corneal transplant outcomes with attention to the use of diabetic donor tissue and diabetic transplant recipients.
Collapse
Affiliation(s)
- Andrew S Goldstein
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Ben J Janson
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Jessica M Skeie
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Jennifer J Ling
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Mark A Greiner
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, IA, USA.
| |
Collapse
|
19
|
Ježek P, Dlasková A. Dynamic of mitochondrial network, cristae, and mitochondrial nucleoids in pancreatic β-cells. Mitochondrion 2019; 49:245-258. [DOI: 10.1016/j.mito.2019.06.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 06/21/2019] [Accepted: 06/24/2019] [Indexed: 12/17/2022]
|
20
|
Mo Y, Deng S, Zhang L, Huang Y, Li W, Peng Q, Liu Z, Ai Y. SS-31 reduces inflammation and oxidative stress through the inhibition of Fis1 expression in lipopolysaccharide-stimulated microglia. Biochem Biophys Res Commun 2019; 520:171-178. [PMID: 31582222 DOI: 10.1016/j.bbrc.2019.09.077] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 09/19/2019] [Indexed: 12/14/2022]
Abstract
SS-31 is a kind of mitochondrion-targeted peptide. Recent studies indicated significant neuroprotective effects of SS-31. In this study, we investigated that SS-31 protected the murine cultured microglial cells (BV-2) against lipopolysaccharide (LPS)-induced inflammation and oxidative stress through stabilizing mitochondrial morphology. The morphological study showed that SS-31 preserved LPS-induced mitochondrial ultrastructure by reducing the fission protein 1 (Fis1) expression. Flow cytometry and Western blot verified that SS-31 defended the BV-2 cells against LPS-stimulated inflammation and oxidative stress via suppressing Fis1. To sum up, our study represents that SS-31 preserves BV-2 cells from LPS-stimulated inflammation and oxidative stress by down-regulating the Fis1 expression.
Collapse
Affiliation(s)
- Yunan Mo
- Department of Critical Care Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, PR China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, PR China.
| | - Songyun Deng
- Department of Critical Care Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, PR China.
| | - Lina Zhang
- Department of Critical Care Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, PR China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, PR China.
| | - Yan Huang
- Department of Critical Care Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, PR China.
| | - Wenchao Li
- Department of Critical Care Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, PR China.
| | - Qianyi Peng
- Department of Critical Care Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, PR China.
| | - Zhiyong Liu
- Department of Critical Care Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, PR China.
| | - Yuhang Ai
- Department of Critical Care Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, PR China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, PR China.
| |
Collapse
|
21
|
Xiang RL, Huang Y, Zhang Y, Cong X, Zhang ZJ, Wu LL, Yu GY. Type 2 diabetes-induced hyposalivation of the submandibular gland through PINK1/Parkin-mediated mitophagy. J Cell Physiol 2019; 235:232-244. [PMID: 31190343 PMCID: PMC6851669 DOI: 10.1002/jcp.28962] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 05/20/2019] [Accepted: 05/22/2019] [Indexed: 12/11/2022]
Abstract
Diabetes is often accompanied by dysfunction of salivary glands. However, the molecular mechanism remains unclear. The mechanisms that underlie diabetic hyposalivation were studied by db/db mice and SMG‐C6 cells. We found morphological changes and decreased stimulated salivary flow rates of the submandibular gland (SMG) in diabetic mice. We observed structural changes and dysfunction of mitochondria. More mitophagosomes and higher expression of autophagy‐related proteins were detected. Increased levels of proteins PINK1 and Parkin indicate that PINK1/Parkin‐mediated mitophagy was activated in diabetic SMG. Consistently, high glucose (HG) induced mitochondrial dysfunction and PINK1/Parkin‐mediated mitophagy in cultivated SMG‐C6 cells. HG also increased reactive oxygen species (ROS) and lessened activation of antioxidants in SMG‐C6 cells. In addition, HG lowered ERK1/2 phosphorylation and HG‐induced mitophagy was decreased after ERK1/2 was activated by LM22B‐10. Altogether, these data suggest that ROS played a crucial role in diabetes‐induced mitochondrial dysfunction and PINK1/Parkin‐mediated mitophagy and ERK1/2 was required in HG‐induced mitophagy in SMG.
Collapse
Affiliation(s)
- Ruo-Lan Xiang
- Center for Salivary Gland Diseases of Peking University School and Hospital of Stomatology, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Beijing, China
| | - Yan Huang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, China
| | - Yan Zhang
- Center for Salivary Gland Diseases of Peking University School and Hospital of Stomatology, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Beijing, China
| | - Xin Cong
- Center for Salivary Gland Diseases of Peking University School and Hospital of Stomatology, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Beijing, China
| | - Zhe-Jing Zhang
- Center for Salivary Gland Diseases of Peking University School and Hospital of Stomatology, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Beijing, China
| | - Li-Ling Wu
- Center for Salivary Gland Diseases of Peking University School and Hospital of Stomatology, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Beijing, China
| | - Guang-Yan Yu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, China
| |
Collapse
|
22
|
Ren L, Zhan P, Wang Q, Wang C, Liu Y, Yu Z, Zhang S. Curcumin upregulates the Nrf2 system by repressing inflammatory signaling-mediated Keap1 expression in insulin-resistant conditions. Biochem Biophys Res Commun 2019; 514:691-698. [PMID: 31078267 DOI: 10.1016/j.bbrc.2019.05.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Accepted: 05/01/2019] [Indexed: 12/23/2022]
Abstract
Both oxidative stress and inflammation contribute to the development of insulin resistance (IR). Curcumin (Cur) not only has an anti-inflammatory effect but also has an antioxidative stress effect via the activation of NF-E2-related factor 2 (Nrf2). Since there is close cross-communication between inflammation and oxidative stress, we examined whether Cur could modulate Nrf2 function via its anti-inflammatory ability and investigated its underlying mechanism. In this study, we show that Cur inhibits inflammatory signaling and Kelch-like ECH-associated protein 1 (Keap1) expression, which is accompanied by the activation of the Nrf2 system. We further identified that the proinflammatory cytokine tumor necrosis factor alpha (TNFα) could stimulate Keap1 synthesis and increase Nrf2 polyubiquitination, but these effects could be significantly inhibited by Cur treatment. This study demonstrates that Cur-induced Nrf2 activation occurs through the inhibition of inflammatory signaling-mediated upregulation of Keap1, contributing to its beneficial effects on redox homeostasis and insulin sensitivity.
Collapse
Affiliation(s)
- Liwei Ren
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, 200040, Shanghai, China
| | - Ping Zhan
- Fujian Key Laboratory of Chinese Materia Medica, Biomedical Drug R&D Center, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China
| | - Qi Wang
- Department of Pathophysiology, Qinghai Medical College, Qinghai University, Xining, 81000, China
| | - Cuixue Wang
- Fujian Key Laboratory of Chinese Materia Medica, Biomedical Drug R&D Center, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China
| | - Yongnian Liu
- Department of Pathophysiology, Qinghai Medical College, Qinghai University, Xining, 81000, China
| | - Zhiwen Yu
- Fujian Key Laboratory of Chinese Materia Medica, Biomedical Drug R&D Center, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China.
| | - Shuangshuang Zhang
- Department of Ultrasound, Huashan Hospital, Fudan University, 200040, Shanghai, China.
| |
Collapse
|
23
|
Pandey R, Bakay M, Hain HS, Strenkowski B, Elsaqa BZB, Roizen JD, Kushner JA, Orange JS, Hakonarson H. CLEC16A regulates splenocyte and NK cell function in part through MEK signaling. PLoS One 2018; 13:e0203952. [PMID: 30226884 PMCID: PMC6143231 DOI: 10.1371/journal.pone.0203952] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 08/30/2018] [Indexed: 12/28/2022] Open
Abstract
CLEC16A is implicated in multiple autoimmune diseases. We generated Clec16a inducible knockout (KO) mice to examine the functional link between CLEC16A auto-inflammation and autoimmunity. Clec16a KO mice exhibited weight loss and thymic and splenic atrophy. Mitochondrial potential was lowered in KO mice splenocytes resulting in aggregation of unhealthy mitochondria in B, T, and NK cells. In Clec16a KO mice we detected disrupted mitophagy in splenic B and T cells. NK cells from Clec16a KO mice exhibited increased cytotoxicity. Incomplete mitophagy was attenuated with PI3K and/or MEK inhibition in Clec16a KO mice. Our results demonstrate a functional link between CLEC16A and disrupted mitophagy in immune cells and show that incomplete mitophagy predisposes the KO mice to inflammation. Taken together, loss of function variants in CLEC16A that are associated with decreased CLEC16A expression levels may contribute to inflammation in autoimmunity through disrupted mitophagy. Drugs modulating mitophagy reverse the process and may be effective in treating and preventing autoimmunity in individuals with risk associated CLEC16A variants.
Collapse
Affiliation(s)
- Rahul Pandey
- The Center for Applied Genomics, The Children’s Hospital of Philadelphia, Philadelphia, PA, United States of America
| | - Marina Bakay
- The Center for Applied Genomics, The Children’s Hospital of Philadelphia, Philadelphia, PA, United States of America
| | - Heather S. Hain
- The Center for Applied Genomics, The Children’s Hospital of Philadelphia, Philadelphia, PA, United States of America
| | - Bryan Strenkowski
- The Center for Applied Genomics, The Children’s Hospital of Philadelphia, Philadelphia, PA, United States of America
| | - Barakat Z. B. Elsaqa
- Department of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| | - Jeffrey D. Roizen
- Division of Endocrinology and Diabetes Children’s Hospital of Philadelphia, Philadelphia, PA, United States of America
| | - Jake A. Kushner
- Section of Pediatric Diabetes and Endocrinology, Department of Pediatric Medicine, Endocrine-Metabolism, Texas Children’s Hospital, Houston, TX, United States of America
| | - Jordan S. Orange
- Section of Immunology, Allergy, and Rheumatology, Department of Pediatric Medicine, Texas Children’s Hospital, Houston, TX, United States of America
| | - Hakon Hakonarson
- The Center for Applied Genomics, The Children’s Hospital of Philadelphia, Philadelphia, PA, United States of America
- Department of Pediatrics, the Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States of America
| |
Collapse
|
24
|
Marine natural products for multi-targeted cancer treatment: A future insight. Biomed Pharmacother 2018; 105:233-245. [PMID: 29859466 DOI: 10.1016/j.biopha.2018.05.142] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 05/26/2018] [Accepted: 05/28/2018] [Indexed: 12/28/2022] Open
Abstract
Cancer is world's second largest alarming disease, which involves abnormal cell growth and have potential to spread to other parts of the body. Most of the available anticancer drugs are designed to act on specific targets by altering the activity of involved transporters and genes. As cancer cells exhibit complex cellular machinery, the regeneration of cancer tissues and chemo resistance towards the therapy has been the main obstacle in cancer treatment. This fact encourages the researchers to explore the multitargeted use of existing medicines to overcome the shortcomings of chemotherapy for alternative and safer treatment strategies. Recent developments in genomics-proteomics and an understanding of the molecular pharmacology of cancer have also challenged researchers to come up with target-based drugs. The literature supports the evidence of natural compounds exhibiting antioxidant, antimitotic, anti-inflammatory, antibiotic as well as anticancer activity. In this review, we have selected marine sponges as a prolific source of bioactive compounds which can be explored for their possible use in cancer and have tried to link their role in cancer pathway. To prove this, we revisited the literature for the selection of cancer genes for the multitargeted use of existing drugs and natural products. We used Cytoscape network analysis and Search tool for retrieval of interacting genes/ proteins (STRING) to study the possible interactions to show the links between the antioxidants, antibiotics, anti-inflammatory and antimitotic agents and their targets for their possible use in cancer. We included total 78 pathways, their genes and natural compounds from the above four pharmacological classes used in cancer treatment for multitargeted approach. Based on the Cytoscape network analysis results, we shortlist 22 genes based on their average shortest path length connecting one node to all other nodes in a network. These selected genes are CDKN2A, FH, VHL, STK11, SUFU, RB1, MEN1, HRPT2, EXT1, 2, CDK4, p14, p16, TSC1, 2, AXIN2, SDBH C, D, NF1, 2, BHD, PTCH, GPC3, CYLD and WT1. The selected genes were analysed using STRING for their protein-protein interactions. Based on the above findings, we propose the selected genes to be considered as major targets and are suggested to be studied for discovering marine natural products as drug lead in cancer treatment.
Collapse
|
25
|
Fan LF, He PY, Peng YC, Du QH, Ma YJ, Jin JX, Xu HZ, Li JR, Wang ZJ, Cao SL, Li T, Yan F, Gu C, Wang L, Chen G. Mdivi-1 ameliorates early brain injury after subarachnoid hemorrhage via the suppression of inflammation-related blood-brain barrier disruption and endoplasmic reticulum stress-based apoptosis. Free Radic Biol Med 2017; 112:336-349. [PMID: 28790012 DOI: 10.1016/j.freeradbiomed.2017.08.003] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 08/02/2017] [Accepted: 08/04/2017] [Indexed: 01/12/2023]
Abstract
Aberrant modulation of mitochondrial dynamic network, which shifts the balance of fusion and fission towards fission, is involved in brain damage of various neurodegenerative diseases including Parkinson's disease, Huntington's disease and Alzheimer's disease. A recent research has shown that the inhibition of mitochondrial fission alleviates early brain injury after experimental subarachnoid hemorrhage, however, the underlying molecular mechanisms have remained to be elucidated. This study was undertaken to characterize the effects of the inhibition of dynamin-related protein-1 (Drp1, a dominator of mitochondrial fission) on blood-brain barrier (BBB) disruption and neuronal apoptosis following SAH and the potential mechanisms. The endovascular perforation model of SAH was performed in adult male Sprague Dawley rats. The results indicated Mdivi-1(a selective Drp1 inhibitor) reversed the morphologic changes of mitochondria and Drp1 translocation, reduced ROS levels, ameliorated the BBB disruption and brain edema remarkably, decreased the expression of MMP-9 and prevented degradation of tight junction proteins-occludin, claudin-5 and ZO-1. Mdivi-1 administration also inhibited the nuclear translocation of nuclear factor-kappa B (NF-κB), leading to decreased expressions of TNF-ɑ, IL-6 and IL-1ß. Moreover, Mdivi-1 treatment attenuated neuronal cell death and improved neurological outcome. To investigate the underlying mechanisms further, we determined that Mdivi-1 reduced p-PERK, p-eIF2α, CHOP, cleaved caspase-3 and Bax expression as well as increased Bcl-2 expression. Rotenone (a selective inhibitor of mitochondrial complexes I) abolished both the anti-BBB disruption and anti-apoptosis effects of Mdivi-1. In conclusion, these data implied that excessive mitochondrial fission might inhibit mitochondrial complex I to become a cause of oxidative stress in SAH, and the inhibition of Drp1 by Mdivi-1 attenuated early brain injury after SAH probably via the suppression of inflammation-related blood-brain barrier disruption and endoplasmic reticulum stress-based apoptosis.
Collapse
Affiliation(s)
- Lin-Feng Fan
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, China
| | - Ping-You He
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, China
| | - Yu-Cong Peng
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, China
| | - Qing-Hua Du
- Zhejiang University School of Medicine, China
| | - Yi-Jun Ma
- Zhejiang University School of Medicine, China
| | | | - Hang-Zhe Xu
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, China
| | - Jian-Ru Li
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, China
| | - Zhi-Jiang Wang
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, China
| | - Sheng-Long Cao
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, China
| | - Tao Li
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, China
| | - Feng Yan
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, China
| | - Chi Gu
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, China
| | - Lin Wang
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, China
| | - Gao Chen
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88 Jiefang Road, Hangzhou, China.
| |
Collapse
|
26
|
Chen L, Liu C, Gao J, Xie Z, Chan LWC, Keating DJ, Yang Y, Sun J, Zhou F, Wei Y, Men X, Yang S. Inhibition of Miro1 disturbs mitophagy and pancreatic β-cell function interfering insulin release via IRS-Akt-Foxo1 in diabetes. Oncotarget 2017; 8:90693-90705. [PMID: 29207597 PMCID: PMC5710878 DOI: 10.18632/oncotarget.20963] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 08/29/2017] [Indexed: 11/25/2022] Open
Abstract
Mitochondrial function is essential to meet metabolic demand of pancreatic beta cells respond to high nutrient stress. Mitophagy is an essential component to normal pancreatic β-cell function and has been associated with β-cell failure in Type 2 diabetes (T2D). Our previous studies have indicated that mitochondrial Rho (Miro) GTPase-mediated mitochondrial dysfunction under high nutrient stress leads to NOD-like receptor 3 (NLRP3)-dependent proinflammatory responses and subsequent insulin resistance. However, the in vivo mechanism by which Miro1 underlies mitophagy has not been identified. Here we show firstly that the expression of Miro is reduced in human T2D and mouse db/db islets and in INS-1 cell line exposed to high glucose and palmitate. β-cell specific ablation of Miro1 (Miro1f/f: Rip-cre mice, or (IKO) under high nutrient stress promotes the development of hyperglycemia. β-cells from IKO mice display an inhibition of mitophagy under oxidative stress and induces mitochondrial dysfunction. Dysfunctional mitophagy in IKO mice is represented by damaged islet beta cell mitochondrial and secretory capacity, unbalanced downstream MKK-JNK signalling without affecting the levels of MEK, ERK or p38 activation and subsequently, impaired insulin secretion signaling via inhibition IRS-AKT-Foxo1 pathway, leading to worsening glucose tolerance in these mice. Thus, these data suggest that Miro1 may be responsible for mitophagy deficiency and β-cell dysfunction in T2D and that strategies target Miro1 in vivo may provide a therapeutic target to enhance β-cell mitochondrial quality and insulin secretion to ameliorate complications associated with T2D.
Collapse
Affiliation(s)
- Lingling Chen
- ABSL-3 Laboratory at the Center for Animal Experiment and Institute of Animal Model for Human Disease, Wuhan University School of Medicine, Wuhan, P. R. China.,Department of Cell Biology, College of Life Science, Nanjing Normal University, Nanjing, Jiangsu, P.R. China
| | - Chunyan Liu
- ABSL-3 Laboratory at the Center for Animal Experiment and Institute of Animal Model for Human Disease, Wuhan University School of Medicine, Wuhan, P. R. China
| | - Jianfeng Gao
- ABSL-3 Laboratory at the Center for Animal Experiment and Institute of Animal Model for Human Disease, Wuhan University School of Medicine, Wuhan, P. R. China
| | - Zhiwen Xie
- School of Bioscience and Technology , Weifang Medical University, Weifang Shandong, P.R. China
| | - Lawrence W C Chan
- Department of Health Technology and Informatics, Hong Kong Polytechnic University, Hong Kong, Hong Kong
| | - Damien J Keating
- Department of Human Physiology and Centre for Neuroscience, Flinders University, Adelaide, South Australia, Australia
| | - Yibin Yang
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, P.R. China
| | - Jiazhong Sun
- Department of Respiratory, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, P.R. China
| | - Fuling Zhou
- Department of Hematology and Radiation, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, P.R. China
| | - Yongchang Wei
- Department of Medical Oncology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, P.R. China
| | - Xiuli Men
- School of Basic Medical Sciences, North China University of Science and Technology, Tangshan, P.R. China
| | - Sijun Yang
- ABSL-3 Laboratory at the Center for Animal Experiment and Institute of Animal Model for Human Disease, Wuhan University School of Medicine, Wuhan, P. R. China
| |
Collapse
|
27
|
Lahera V, de Las Heras N, López-Farré A, Manucha W, Ferder L. Role of Mitochondrial Dysfunction in Hypertension and Obesity. Curr Hypertens Rep 2017; 19:11. [PMID: 28233236 DOI: 10.1007/s11906-017-0710-9] [Citation(s) in RCA: 132] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Mitochondria are essential for the maintenance of normal physiological function of tissue cells. Mitochondria are subject to dynamic processes in order to establish a control system related to survival or cell death and adaptation to changes in the metabolic environment of cells. Mitochondrial dynamics includes fusion and fission processes, biogenesis, and mitophagy. Modifications of mitochondrial dynamics in organs involved in energy metabolism such as the pancreas, liver, skeletal muscle, and white adipose tissue could be of relevance for the development of insulin resistance, obesity, and type 2 diabetes. Mitochondrial dynamics and the factors involved in its regulation are also critical for neuronal development, survival, and function. Modifications in mitochondrial dynamics in either agouti-related peptide (AgRP) or pro-opiomelanocortin (POMC), circuits which regulates feeding behavior, are related to changes of food intake, energy balance, and obesity development. Activation of the sympathetic nervous system has been considered as a crucial point in the pathogenesis of hypertension among obese individuals and it also plays a key role in cardiac remodeling. Hypertension-related cardiac hypertrophy is associated with changes in metabolic substrate utilization, dysfunction of the electron transport chain, and ATP synthesis. Alterations in both mitochondrial dynamics and ROS production have been associated with endothelial dysfunction, development of hypertension, and cardiac hypertrophy. Finally, it might be postulated that alterations of mitochondrial dynamics in white adipose tissue could contribute to the development and maintenance of hypertension in obesity situations through leptin overproduction. Leptin, together with insulin, will induce activation of sympathetic nervous system with consequences at renal, vascular, and cardiac levels, driving to sodium retention, hypertension, and left ventricular hypertrophy. Moreover, both leptin and insulin will induce mitochondrial alterations into arcuate nucleus leading to signals driving to increased food intake and reduced energy expenditure. This, in turn would perpetuate white adipose tissue excess and its well-known metabolic and cardiovascular consequences.
Collapse
Affiliation(s)
- Vicente Lahera
- Department of Physiology, School of Medicine, Complutense University, 28040, Madrid, Spain.
| | - Natalia de Las Heras
- Department of Physiology, School of Medicine, Complutense University, 28040, Madrid, Spain
| | - Antonio López-Farré
- Department of Medicine, School of Medicine, Complutense University, Madrid, Spain
| | - Walter Manucha
- Instituto de Medicina y Biología Experimental de Cuyo (IMBECU), Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Mendoza, Argentina.,Área de Farmacología, Departamento de Patología, Facultad de Ciencias Médicas, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - León Ferder
- Pediatric Department Nephrology Division, Miller School of Medicine, University of Miami, Miami, FL, USA
| |
Collapse
|
28
|
Affiliation(s)
- Piero Marchetti
- Department of Clinical and Experimental Medicine, Cisanello University Hospital, University of Pisa, Via Paradisa 2, 56124, Pisa, Italy.
| |
Collapse
|