1
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Yamada R, Michimae M, Hamamoto A, Takemori H. Melanin-concentrating hormone receptor 1 is discarded by exosomes after internalization. Biochem Biophys Res Commun 2024; 710:149917. [PMID: 38604071 DOI: 10.1016/j.bbrc.2024.149917] [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: 03/14/2024] [Revised: 04/01/2024] [Accepted: 04/06/2024] [Indexed: 04/13/2024]
Abstract
Melanin-concentrating hormone (MCH) receptor 1 (MCHR1), a G protein-coupled receptor, is poised for interaction with its ligands on the plasma membrane. Analyses of MCHR1 knockout mice suggest that this receptor could be a therapeutic target for the treatment of appetite disorders, glucose metabolism, psychiatric disorders, and inflammation. Binding of MCH to MCHR1 initiates calcium signaling, which is subsequently attenuated through receptor internalization. However, the ultimate destiny of the receptor post-internalization remains unexplored. In this study, we report the extracellular secretion of MCHR1 via exosomes. The recruitment of MCHR1 to exosomes occurs subsequent to its internalization, which is induced by stimulation with the ligand MCH. Although a highly glycosylated form of MCHR1, potentially representing a mature form, is selectively recruited to exosomes, the MCHR1 transferred into other cells does not exhibit functionality. The truncation of MCHR1 at the C-terminus not only impairs its response to MCH but also hinders its recruitment to exosomes. These findings imply that functional MCHR1 could be secreted extracellularly via exosomes, a process that may represent a mechanism for the termination of intracellular MCHR1 signaling.
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Affiliation(s)
- Ryohei Yamada
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Momoka Michimae
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Akie Hamamoto
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan; Graduate School of Integrated Arts and Sciences, Hiroshima University, Hiroshima, 739-8521, Japan
| | - Hiroshi Takemori
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan.
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2
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Izadpanah M, Yalameha B, Sani MZ, Cheragh PK, Mahdipour M, Rezabakhsh A, Rahbarghazi R. Exosomes as Theranostic Agents in Reproduction System. Adv Biol (Weinh) 2024; 8:e2300258. [PMID: 37955866 DOI: 10.1002/adbi.202300258] [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: 06/27/2023] [Revised: 10/06/2023] [Indexed: 11/14/2023]
Abstract
Exosomes (Exos), belonging to extracellular vesicles, are cell-derived nano-sized vesicles with the potential to carry different kinds of biological molecules. Many studies have proved the impacts of exosomal cargo on several biological processes in female and male reproductive systems. It is also hypothesized that changes in exosomal cargo are integral to the promotion of certain pathological conditions, thus Exos can be used as valid biomarkers for the diagnosis of infertility and other abnormal conditions. Here, efforts are made to collect some recent data related to the physiological significance of Exos in the reproductive system, and their potential therapeutic effects. It is anticipated that the current review article will lay the groundwork for elucidating the source and mechanisms by which Exos control the reproductive system additionally supplying fresh methods and concepts for the detection and treatment of disorders associated with fertility for future studies.
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Affiliation(s)
- Melika Izadpanah
- Department of Anatomical Sciences, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Banafsheh Yalameha
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Biochemistry and Clinical Laboratories, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Maryam Zamani Sani
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Mahdi Mahdipour
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Aysa Rezabakhsh
- Cardiovascular Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Reza Rahbarghazi
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Applied Cell Sciences, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
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3
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Pomeshchik Y, Velasquez E, Gil J, Klementieva O, Gidlöf R, Sydoff M, Bagnoli S, Nacmias B, Sorbi S, Westergren-Thorsson G, Gouras GK, Rezeli M, Roybon L. Proteomic analysis across patient iPSC-based models and human post-mortem hippocampal tissue reveals early cellular dysfunction and progression of Alzheimer's disease pathogenesis. Acta Neuropathol Commun 2023; 11:150. [PMID: 37715247 PMCID: PMC10504768 DOI: 10.1186/s40478-023-01649-z] [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: 06/03/2023] [Accepted: 08/30/2023] [Indexed: 09/17/2023] Open
Abstract
The hippocampus is a primary region affected in Alzheimer's disease (AD). Because AD postmortem brain tissue is not available prior to symptomatic stage, we lack understanding of early cellular pathogenic mechanisms. To address this issue, we examined the cellular origin and progression of AD pathogenesis by comparing patient-based model systems including iPSC-derived brain cells transplanted into the mouse brain hippocampus. Proteomic analysis of the graft enabled the identification of pathways and network dysfunction in AD patient brain cells, associated with increased levels of Aβ-42 and β-sheet structures. Interestingly, the host cells surrounding the AD graft also presented alterations in cellular biological pathways. Furthermore, proteomic analysis across human iPSC-based models and human post-mortem hippocampal tissue projected coherent longitudinal cellular changes indicative of early to end stage AD cellular pathogenesis. Our data showcase patient-based models to study the cell autonomous origin and progression of AD pathogenesis.
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Affiliation(s)
- Yuriy Pomeshchik
- iPSC Laboratory for CNS Disease Modelling, Department of Experimental Medical Science, BMC D10, Lund University, 22184, Lund, Sweden.
- Strategic Research Area MultiPark, Lund University, 22184, Lund, Sweden.
- Lund Stem Cell Center, Lund University, 22184, Lund, Sweden.
| | - Erika Velasquez
- iPSC Laboratory for CNS Disease Modelling, Department of Experimental Medical Science, BMC D10, Lund University, 22184, Lund, Sweden
- Strategic Research Area MultiPark, Lund University, 22184, Lund, Sweden
- Lund Stem Cell Center, Lund University, 22184, Lund, Sweden
| | - Jeovanis Gil
- Clinical Protein Science & Imaging, Department of Biomedical Engineering, BMC D13, Lund University, 22184, Lund, Sweden
| | - Oxana Klementieva
- Strategic Research Area MultiPark, Lund University, 22184, Lund, Sweden
- Medical Micro-Spectroscopy, Department of Experimental Medical Science, BMC B10, Lund University, 22184, Lund, Sweden
| | - Ritha Gidlöf
- Lund University BioImaging Centre, Faculty of Medicine, Lund University, 22142, Lund, Sweden
| | - Marie Sydoff
- Lund University BioImaging Centre, Faculty of Medicine, Lund University, 22142, Lund, Sweden
| | - Silvia Bagnoli
- Laboratorio Di Neurogenetica, Dipartimento Di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino- NEUROFARBA, Università degli Studi di Firenze, 50134, Florence, Italy
- IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy
| | - Benedetta Nacmias
- Laboratorio Di Neurogenetica, Dipartimento Di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino- NEUROFARBA, Università degli Studi di Firenze, 50134, Florence, Italy
- IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy
| | - Sandro Sorbi
- Laboratorio Di Neurogenetica, Dipartimento Di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino- NEUROFARBA, Università degli Studi di Firenze, 50134, Florence, Italy
- IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy
| | - Gunilla Westergren-Thorsson
- Department of Experimental Medical Science, BMC C12, Faculty of Medicine, Lund University, 22142, Lund, Sweden
| | - Gunnar K Gouras
- Strategic Research Area MultiPark, Lund University, 22184, Lund, Sweden
- Experimental Dementia Research Unit, Department of Experimental Medical Science, BMC B11, Lund University, 22184, Lund, Sweden
| | - Melinda Rezeli
- Clinical Protein Science & Imaging, Department of Biomedical Engineering, BMC D13, Lund University, 22184, Lund, Sweden
- Swedish National Infrastructure for Biological Mass Spectrometry (BioMS), Lund University, 22184, Lund, Sweden
| | - Laurent Roybon
- iPSC Laboratory for CNS Disease Modelling, Department of Experimental Medical Science, BMC D10, Lund University, 22184, Lund, Sweden.
- Strategic Research Area MultiPark, Lund University, 22184, Lund, Sweden.
- Lund Stem Cell Center, Lund University, 22184, Lund, Sweden.
- Department of Neurodegenerative Science, The MiND Program, Van Andel Institute, Grand Rapids, MI, USA.
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4
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Chang YC, Li CH, Chan MH, Fang CY, Zhang ZX, Chen CL, Hsiao M. Overexpression of synaptic vesicle protein Rab GTPase 3C promotes vesicular exocytosis and drug resistance in colorectal cancer cells. Mol Oncol 2023; 17:422-444. [PMID: 36652260 PMCID: PMC9980308 DOI: 10.1002/1878-0261.13378] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 11/21/2022] [Accepted: 01/16/2023] [Indexed: 01/19/2023] Open
Abstract
Rab GTPase 3C (RAB3C) is a peripheral membrane protein that is involved in membrane trafficking (vesicle formation) and cell movement. Recently, researchers have noted the exocytosis of RAB proteins, and their dysregulation is correlated with drug resistance and the altered tumor microenvironment in tumorigenesis. However, the molecular mechanisms of exocytotic RABs in the carcinogenicity of colorectal cancer (CRC) remain unknown. Researchers have used various in silico datasets to evaluate the expression profiles of RAB family members. We confirmed that RAB3C plays a key role in CRC progression. Its overexpression promotes exocytosis and is related to the resistance to several chemotherapeutic drugs. We established a proteomic dataset based on RAB3C, and found that dystrophin is one of the proteins that is upregulated with the overexpression of RAB3C. According to our results, RAB3C-induced dystrophin expression promotes vesicle formation and packaging. A connectivity map predicted that the cannabinoid receptor 2 (CB2) agonists reverse RAB3C-associated drug resistance, and that these agonists have synergistic effects when combined with standard chemotherapy regimens. Moreover, we found high dystrophin expression levels in CRC patients with poor survival outcomes. A combination of the dystrophin and RAB3C expression profiles can serve as an independent prognostic factor in CRC and is associated with several clinicopathological parameters. In addition, the RAB3C-dystrophin axis is positively correlated with the phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform (PIK3CA) genetic alterations in CRC patients. These findings can be used to provide novel combined therapeutic options for the treatment of CRC.
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Affiliation(s)
- Yu-Chan Chang
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Chien-Hsiu Li
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Ming-Hsien Chan
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Chih-Yeu Fang
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli, Taiwan
| | - Zhi-Xuan Zhang
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Chi-Long Chen
- Department of Pathology, Taipei Medical University Hospital and College of Medicine, Taipei Medical University, Taiwan
| | - Michael Hsiao
- Genomics Research Center, Academia Sinica, Taipei, Taiwan.,Department and Graduate Institute of Veterinary Medicine, School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan
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5
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Yang X, Zheng E, Chatterjee V, Ma Y, Reynolds A, Villalba N, Wu MH, Yuan SY. Protein palmitoylation regulates extracellular vesicle production and function in sepsis. JOURNAL OF EXTRACELLULAR BIOLOGY 2022; 1:e50. [PMID: 38419739 PMCID: PMC10901530 DOI: 10.1002/jex2.50] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 05/16/2022] [Accepted: 06/19/2022] [Indexed: 03/02/2024]
Abstract
Extracellular vesicles (EVs) are bioactive membrane-encapsulated particles generated by a series of events involving membrane budding, fission and fusion. Palmitoylation, mediated by DHHC palmitoyl acyltransferases, is a lipidation reaction that increases protein lipophilicity and membrane localization. Here, we report palmitoylation as a novel regulator of EV formation and function during sepsis. Our results showed significantly decreased circulating EVs in mice with DHHC21 functional deficiency (Zdhhc21dep/dep), compared to wild-type (WT) mice 24 h after septic injury. Furthermore, WT and Zdhhc21dep/dep EVs displayed distinct palmitoyl-proteomic profiles. Ingenuity pathway analysis indicated that sepsis altered several inflammation related pathways expressed in EVs, among which the most significantly activated was the complement pathway; however, this sepsis-induced complement enrichment in EVs was greatly blunted in Zdhhc21dep/dep EVs. Functionally, EVs isolated from WT mice with sepsis promoted neutrophil adhesion, transmigration, and neutrophil extracellular trap production; these effects were significantly attenuated by DHHC21 loss-of-function. Furthermore, Zdhhc21dep/dep mice displayed reduced neutrophil infiltration in lungs and improved survival after CLP challenges. These findings indicate that blocking palmitoylation via DHHC21 functional deficiency can reduce sepsis-stimulated production of complement-enriched EVs and attenuates their effects on neutrophil activity.
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Affiliation(s)
- Xiaoyuan Yang
- Department of Molecular Pharmacology and PhysiologyUniversity of South Florida Morsani College of MedicineTampaFloridaUSA
| | - Ethan Zheng
- Department of Molecular Pharmacology and PhysiologyUniversity of South Florida Morsani College of MedicineTampaFloridaUSA
| | - Victor Chatterjee
- Department of Molecular Pharmacology and PhysiologyUniversity of South Florida Morsani College of MedicineTampaFloridaUSA
| | - Yonggang Ma
- Department of Molecular Pharmacology and PhysiologyUniversity of South Florida Morsani College of MedicineTampaFloridaUSA
| | - Amanda Reynolds
- Department of Molecular Pharmacology and PhysiologyUniversity of South Florida Morsani College of MedicineTampaFloridaUSA
| | - Nuria Villalba
- Department of Molecular Pharmacology and PhysiologyUniversity of South Florida Morsani College of MedicineTampaFloridaUSA
| | - Mack H. Wu
- Department of SurgeryUniversity of South Florida Morsani College of MedicineTampaFloridaUSA
| | - Sarah Y. Yuan
- Department of Molecular Pharmacology and PhysiologyUniversity of South Florida Morsani College of MedicineTampaFloridaUSA
- Department of SurgeryUniversity of South Florida Morsani College of MedicineTampaFloridaUSA
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6
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Kumari S, Dash PK, Kumari T, Guo ML, Ghosh JK, Buch SJ, Tripathi RK. HIV-1 Nef hijacks both exocytic and endocytic pathways of host intracellular trafficking through differential regulation of Rab GTPases. Biol Cell 2022; 114:276-292. [PMID: 35713972 DOI: 10.1111/boc.202100027] [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: 05/05/2021] [Revised: 05/12/2022] [Accepted: 05/13/2022] [Indexed: 12/01/2022]
Abstract
HIV-1 Nef regulates several cellular functions in an infected cell which results in viral persistence and AIDS pathogenesis. The currently understood molecular mechanism(s) underlying Nef-dependent cellular function(s) are unable to explain how events are coordinately regulated in the host cell. Intracellular membranous trafficking maintains cellular homeostasis and is regulated by Rab GTPases - a member of the Ras superfamily. In the current study, we tried to decipher the role of Nef on the Rab GTPases-dependent complex and vesicular trafficking. Expression profiling of Rabs in Nef-expressing cells showed that Nef differentially regulates the expression of individual Rabs in a cell-specific manner. Further analysis of Rabs in HIV-1NL4-3 or ΔNef infected cells demonstrated that the Nef protein is responsible for variation in Rabs expression. Using a panel of competitive peptide inhibitors against Nef, we identified the critical domain of HIV-1 Nef involved in modulation of Rabs expression. The molecular function of Nef-mediated upregulation of Rab5 and Rab7 and downregulation of Rab11 increased the transport of SERINC5 from the cell surface to the lysosomal compartment. Moreover, the Nef-dependent increase in Rab27 expression assists exosome release. Reversal of Rabs expression using competitive inhibitors against Nef and manipulation of Rabs expression reduced viral release and infectivity of progeny virions. Overall, this study demonstrates that Nef differentially regulates the expression of Rab proteins in HIV-1 infected cells to hijack the host intracellular trafficking, which augments viral replication and HIV-1 pathogenesis. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Sushila Kumari
- Virus Research and Therapeutics Division, CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension, Sitapur Road, Lucknow, U.P., 226031, India
| | - Prasanta K Dash
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Tripti Kumari
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension, Sitapur Road, Lucknow, U.P., 226031, India
| | - Ming-Lei Guo
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Jimut Kanti Ghosh
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension, Sitapur Road, Lucknow, U.P., 226031, India
| | - Shilpa J Buch
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Raj Kamal Tripathi
- Virus Research and Therapeutics Division, CSIR-Central Drug Research Institute, Sector-10, Janakipuram Extension, Sitapur Road, Lucknow, U.P., 226031, India
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7
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Chatterjee A, Ansar S, Gopal D, Vetrivel U, George R, Narayanan J. Elucidating the Therapeutic Potential of Cell-Penetrating Peptides in Human Tenon Fibroblast Cells. ACS OMEGA 2022; 7:16536-16546. [PMID: 35601335 PMCID: PMC9118429 DOI: 10.1021/acsomega.2c00701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 04/21/2022] [Indexed: 06/15/2023]
Abstract
Cell-penetrating peptides (CPPs) have been widely used as vehicles for delivering therapeutic molecules to the site of action. Apart from their delivering potential, the biological effects of CPPs have not been explored in detail. JTS-1 is a CPP that has been reported to have gene delivery functions, although its biological role is yet to be determined. Hence, in this study, we revealed the biological mechanism such as its uptake mechanism and immunogenic potential and function using primary human tenon fibroblast (TF) cells collected from patients undergoing glaucoma trabeculectomy surgery. Our results showed that the JTS-1 peptide has an α-helical structure and is nontoxic up to 1 μM concentration. It was found to be colocalized with early endosome (Rab5), recycling endosome (Rab7), and Rab11 and interacted with major histocompatibility complex (MHC) class I and II. The peptide also affected actin polymerization, which is regulated by cofilin phosphorylation and ROCK1 localization. It also inhibited TF cell proliferation. Therefore, the JTS-1 peptide could be used as a possible therapeutic agent for modifying the fibrosis process, where TF proliferation is a key cause of surgery failure.
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Affiliation(s)
- Amit Chatterjee
- Department
of Nanobiotechnology, Vision Research Foundation, No.18/41, College Road, Nungambakkam, Chennai, Tamil Nadu 600006, India
| | - Samdani Ansar
- Department
of Bioinformatics, Vision Research Foundation, No.18/41, College Road, Nungambakkam, Chennai, Tamil Nadu 600006, India
| | - Divya Gopal
- Department
of Nanobiotechnology, Vision Research Foundation, No.18/41, College Road, Nungambakkam, Chennai, Tamil Nadu 600006, India
| | - Umashankar Vetrivel
- Department
of Bioinformatics, Vision Research Foundation, No.18/41, College Road, Nungambakkam, Chennai, Tamil Nadu 600006, India
- Department
of Health Research (Govt. of India), National
Institute of Traditional Medicine, Indian Council of Medical Research, Belagavi 590010, India
| | - Ronnie George
- Department
of Glaucoma, Medical & Vision Research
Foundation, No.18/41,
College Road, Nungambakkam, Chennai, Tamil Nadu 600006, India
| | - Janakiraman Narayanan
- Department
of Nanobiotechnology, Vision Research Foundation, No.18/41, College Road, Nungambakkam, Chennai, Tamil Nadu 600006, India
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8
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Lo Iacono M, Signorino E, Petiti J, Pradotto M, Calabrese C, Panuzzo C, Caciolli F, Pergolizzi B, De Gobbi M, Rege-Cambrin G, Fava C, Giachino C, Bracco E, Saglio G, Frassoni F, Cilloni D. Genetic Screening for Potential New Targets in Chronic Myeloid Leukemia Based on Drosophila Transgenic for Human BCR-ABL1. Cancers (Basel) 2021; 13:cancers13020293. [PMID: 33466839 PMCID: PMC7830713 DOI: 10.3390/cancers13020293] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 12/23/2020] [Accepted: 01/11/2021] [Indexed: 11/16/2022] Open
Abstract
Chronic myeloid leukemia is a myeloproliferative neoplasm characterized by the presence of the Philadelphia chromosome that originates from the reciprocal translocation t(9;22)(q34;q11.2) and encodes for the constitutively active tyrosine kinase protein BCR-ABL1 from the Breakpoint Cluster Region (BCR) sequence and the Abelson (ABL1) gene. Despite BCR-ABL1 being one of the most studied oncogenic proteins, some molecular mechanisms remain enigmatic, and several of the proteins, acting either as positive or negative BCR-ABL1 regulators, are still unknown. The Drosophila melanogaster represents a powerful tool for genetic investigations and a promising model to study the BCR-ABL1 signaling pathway. To identify new components involved in BCR-ABL1 transforming activity, we conducted an extensive genetic screening using different Drosophila mutant strains carrying specific small deletions within the chromosomes 2 and 3 and the gmrGal4,UAS-BCR-ABL1 4M/TM3 transgenic Drosophila as the background. From the screening, we identified several putative candidate genes that may be involved either in sustaining chronic myeloid leukemia (CML) or in its progression. We also identified, for the first time, a tight connection between the BCR-ABL1 protein and Rab family members, and this correlation was also validated in CML patients. In conclusion, our data identified many genes that, by interacting with BCR-ABL1, regulate several important biological pathways and could promote disease onset and progression.
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Affiliation(s)
- Marco Lo Iacono
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy; (E.S.); (J.P.); (M.P.); (C.C.); (C.P.); (F.C.); (B.P.); (M.D.G.); (G.R.-C.); (C.F.); (C.G.); (G.S.); (F.F.); (D.C.)
- Correspondence: ; Tel.: +39-011-6705445
| | - Elisabetta Signorino
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy; (E.S.); (J.P.); (M.P.); (C.C.); (C.P.); (F.C.); (B.P.); (M.D.G.); (G.R.-C.); (C.F.); (C.G.); (G.S.); (F.F.); (D.C.)
| | - Jessica Petiti
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy; (E.S.); (J.P.); (M.P.); (C.C.); (C.P.); (F.C.); (B.P.); (M.D.G.); (G.R.-C.); (C.F.); (C.G.); (G.S.); (F.F.); (D.C.)
| | - Monica Pradotto
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy; (E.S.); (J.P.); (M.P.); (C.C.); (C.P.); (F.C.); (B.P.); (M.D.G.); (G.R.-C.); (C.F.); (C.G.); (G.S.); (F.F.); (D.C.)
| | - Chiara Calabrese
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy; (E.S.); (J.P.); (M.P.); (C.C.); (C.P.); (F.C.); (B.P.); (M.D.G.); (G.R.-C.); (C.F.); (C.G.); (G.S.); (F.F.); (D.C.)
| | - Cristina Panuzzo
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy; (E.S.); (J.P.); (M.P.); (C.C.); (C.P.); (F.C.); (B.P.); (M.D.G.); (G.R.-C.); (C.F.); (C.G.); (G.S.); (F.F.); (D.C.)
| | - Francesca Caciolli
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy; (E.S.); (J.P.); (M.P.); (C.C.); (C.P.); (F.C.); (B.P.); (M.D.G.); (G.R.-C.); (C.F.); (C.G.); (G.S.); (F.F.); (D.C.)
| | - Barbara Pergolizzi
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy; (E.S.); (J.P.); (M.P.); (C.C.); (C.P.); (F.C.); (B.P.); (M.D.G.); (G.R.-C.); (C.F.); (C.G.); (G.S.); (F.F.); (D.C.)
| | - Marco De Gobbi
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy; (E.S.); (J.P.); (M.P.); (C.C.); (C.P.); (F.C.); (B.P.); (M.D.G.); (G.R.-C.); (C.F.); (C.G.); (G.S.); (F.F.); (D.C.)
| | - Giovanna Rege-Cambrin
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy; (E.S.); (J.P.); (M.P.); (C.C.); (C.P.); (F.C.); (B.P.); (M.D.G.); (G.R.-C.); (C.F.); (C.G.); (G.S.); (F.F.); (D.C.)
| | - Carmen Fava
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy; (E.S.); (J.P.); (M.P.); (C.C.); (C.P.); (F.C.); (B.P.); (M.D.G.); (G.R.-C.); (C.F.); (C.G.); (G.S.); (F.F.); (D.C.)
| | - Claudia Giachino
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy; (E.S.); (J.P.); (M.P.); (C.C.); (C.P.); (F.C.); (B.P.); (M.D.G.); (G.R.-C.); (C.F.); (C.G.); (G.S.); (F.F.); (D.C.)
| | - Enrico Bracco
- Department of Oncology, University of Turin, 10043 Turin, Italy;
| | - Giuseppe Saglio
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy; (E.S.); (J.P.); (M.P.); (C.C.); (C.P.); (F.C.); (B.P.); (M.D.G.); (G.R.-C.); (C.F.); (C.G.); (G.S.); (F.F.); (D.C.)
| | - Francesco Frassoni
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy; (E.S.); (J.P.); (M.P.); (C.C.); (C.P.); (F.C.); (B.P.); (M.D.G.); (G.R.-C.); (C.F.); (C.G.); (G.S.); (F.F.); (D.C.)
| | - Daniela Cilloni
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy; (E.S.); (J.P.); (M.P.); (C.C.); (C.P.); (F.C.); (B.P.); (M.D.G.); (G.R.-C.); (C.F.); (C.G.); (G.S.); (F.F.); (D.C.)
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9
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Lv W, Champion JA. Demonstration of intracellular trafficking, cytosolic bioavailability, and target manipulation of an antibody delivery platform. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2020; 32:102315. [PMID: 33065253 DOI: 10.1016/j.nano.2020.102315] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 09/30/2020] [Accepted: 10/07/2020] [Indexed: 02/06/2023]
Abstract
Intracellular antibody delivery into live cells has significant implications for research and therapeutic applications. However, many delivery systems lack potency due to low uptake and/or endosomal entrapment and understanding of intracellular delivery processes is lacking. Herein, we studied the cellular uptake, intracellular trafficking and targeting of antibodies using our previously developed Hex antibody nanocarrier. We demonstrated Hex-antibodies were internalized through multiple endocytic routes into lysosomes and provide evidence of endo/lysosomal disruption and Hex-antibody release to the cytosol. Cytosolic antibodies retained their bioactivity for at least 24 h. Functional effect of Hex delivered anti-STAT3 antibodies was evidenced by inhibition of nuclear translocation of cytosolic transcription factor STAT3. This study has generated understanding of key steps in the Hex intracellular antibody delivery system and will facilitate the development of effective cytosolic antibody delivery and applications in both the therapeutic and research domains.
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Affiliation(s)
- Wei Lv
- School of Chemical & Biomolecular Engineering and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, United States
| | - Julie A Champion
- School of Chemical & Biomolecular Engineering and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, United States.
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10
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Schmoker AM, Perez Pearson LM, Cruz C, Colon Flores LG, Branfeild S, Pagán Torres FD, Fonseca K, Cantres YM, Salgado Ramirez CA, Melendez LM, Ballif BA, Washington AV. Defining the TLT-1 interactome from resting and activated human platelets. J Proteomics 2020; 215:103638. [PMID: 31923473 PMCID: PMC7044047 DOI: 10.1016/j.jprot.2020.103638] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 01/03/2020] [Accepted: 01/05/2020] [Indexed: 12/14/2022]
Abstract
The triggering receptor expressed on myeloid cells (TREM) protein family forms a class of type I transmembrane proteins expressed in immune cells that play important roles in innate and adaptive immune responses. The TREM family member TREM-like transcript 1 (TLT-1, also TREML1) is expressed in megakaryocytes and packaged into platelet granules. TLT-1 binds fibrinogen and plays a role in bleeding initiated by inflammatory insults. Here, we describe a proteomics screen that maps the TLT-1 interactome in resting and activated human platelets. Several identified TLT-1 interactors are involved in cell adhesion and migration, as well as platelet activation. Select interactors, including β3-integrin, RACK1, GRB2, and Rabs 5A, 7, and 11A, were additionally characterized in co-immunoprecipitation/immunoblotting experiments. Finally, several phosphorylation sites were found on immunoprecipitated TLT-1, including Thr280, a novel, regulated site on a conserved residue near the TLT-1 ITIM regulatory sequence. SIGNIFICANCE: Platelet function relies on the secretion of active molecules from intracellular vesicles, or granules, which contain soluble and membrane-bound proteins that are essential for platelet aggregation, coagulation reactions, and pathogen defense mechanisms. TLT-1 is sequestered in α-granules and transported to the plasma membrane, where it plays a unique role in hemostasis after inflammatory insults. Despite the known importance of TLT-1 in platelet biology, our knowledge of TLT-1 mechanistic signaling is limited. This study defines the TLT-1 interactome in resting and active human platelets, identifying several novel TLT-1 interactors, as well as TLT-1 phosphorylation sites, all with likely signaling implications in platelet aggregation dynamics.
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Affiliation(s)
- Anna M Schmoker
- Department of Biology, University of Vermont, 109 Carrigan Drive, 120A Marsh Life Sciences, Burlington, VT 05405, USA.
| | - Leishla M Perez Pearson
- Department of Biology, University of Vermont, 109 Carrigan Drive, 120A Marsh Life Sciences, Burlington, VT 05405, USA; Department of Biology, University of Puerto Rico-Río Piedras, Department of Biology, San Juan, PR, USA
| | - Claudia Cruz
- Department of Biology, University of Vermont, 109 Carrigan Drive, 120A Marsh Life Sciences, Burlington, VT 05405, USA; Department of Biology, University of Puerto Rico-Río Piedras, Department of Biology, San Juan, PR, USA
| | - Luis G Colon Flores
- Department of Biology, University of Puerto Rico-Río Piedras, Department of Biology, San Juan, PR, USA
| | - Siobhan Branfeild
- Department of Biology, University of Puerto Rico-Río Piedras, Department of Biology, San Juan, PR, USA
| | - Fabiola D Pagán Torres
- Department of Biology, University of Vermont, 109 Carrigan Drive, 120A Marsh Life Sciences, Burlington, VT 05405, USA
| | - Karmen Fonseca
- Department of Biology, University of Vermont, 109 Carrigan Drive, 120A Marsh Life Sciences, Burlington, VT 05405, USA
| | - Yadira M Cantres
- Translational Proteomics Center, Comprehensive Cancer Center, University of Puerto Rico, Medical Sciences Campus, San Juan, PR, USA
| | - Carla A Salgado Ramirez
- Translational Proteomics Center, Comprehensive Cancer Center, University of Puerto Rico, Medical Sciences Campus, San Juan, PR, USA
| | - Loyda M Melendez
- Department of Microbiology and Medical Zoology, University of Puerto Rico, Medical Sciences Campus, San Juan, PR, USA; Translational Proteomics Center, Comprehensive Cancer Center, University of Puerto Rico, Medical Sciences Campus, San Juan, PR, USA
| | - Bryan A Ballif
- Department of Biology, University of Vermont, 109 Carrigan Drive, 120A Marsh Life Sciences, Burlington, VT 05405, USA.
| | - A Valance Washington
- Department of Biology, University of Puerto Rico-Río Piedras, Department of Biology, San Juan, PR, USA.
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11
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Amit C, Padmanabhan P, Elchuri SV, Narayanan J. Probing the effect of matrix stiffness in endocytic signalling pathway of corneal epithelium. Biochem Biophys Res Commun 2020; 525:280-285. [PMID: 32087964 DOI: 10.1016/j.bbrc.2020.02.067] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 02/09/2020] [Indexed: 11/30/2022]
Abstract
Matrix stiffness regulates the physiology of the cells and plays an important role in maintaining its homeostasis. It has been reported to regulate cell division, proliferation, migration, extracellular uptake and various other physiological processes. The alteration in matrix stiffness has also been well reported in various disease pathologies. However, in ocular system, Keratoconus (KC) is an ideal model to study the effect of matrix stiffness on endocytosis since the progression of the disease is controlled by increasing the stromal elasticity. Our study using corneal epithelial and retinal pigment epithelial cell lines showed that ocular cells do respond to matrix stiffness by altering their morphology and endocytic uptake of FITC-Dextran 20 kDa. Further, by using KC epithelium as a clinical model, we hypothesize that change in stromal elasticity may also affect the endocytosis of KC epithelium. Our results clearly showed alteration in the expression of actin binding proteins such as Phosphorylated Cofilin, Profilin, Focal adhesion kinase, and Vinculin. Apart from cytoskeletal rearrangement proteins, we also observed endocytic proteins such as Clathrin, Caveolin1 and Rab 11 to be affected by matrix stiffness. Our study thus establishes connecting role between endocytosis and matrix stiffness which could be used to understand the pathophysiology of keratoconus that it is influenced by both mechanical and biochemical factors.
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Affiliation(s)
- Chatterjee Amit
- Department of Nanobiotechnology, Vision Research Foundation, Sankara Nethralaya Campus, Chennai, Tamil Nadu, India; School of Chemical and Biotechnology, SASTRA Deemed University, Tanjore, Tamil Nadu, India
| | - Prema Padmanabhan
- Department of Cornea, Medical Research Foundation, Sankara Nethralaya Campus, Chennai, Tamil Nadu, India
| | - Sailaja V Elchuri
- Department of Nanobiotechnology, Vision Research Foundation, Sankara Nethralaya Campus, Chennai, Tamil Nadu, India
| | - Janakiraman Narayanan
- Department of Nanobiotechnology, Vision Research Foundation, Sankara Nethralaya Campus, Chennai, Tamil Nadu, India.
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12
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Wang Q, Liu M, Zang Y, Xiao W. The C-terminal extension of Arabidopsis Uev1A/B with putative prenylation site plays critical roles in protein interaction, subcellular distribution and membrane association. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 291:110324. [PMID: 31928655 DOI: 10.1016/j.plantsci.2019.110324] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 10/18/2019] [Accepted: 10/23/2019] [Indexed: 06/10/2023]
Abstract
Lysine (K) 63-linked polyubiquitination plays important roles in cellular processes including DNA-damage tolerance (DDT), NF-κB signaling and endocytosis. Compared to yeast and mammals, little is known about K63-linked polyubiquitination in plants. To date, a Uev-Ubc13 complex is the only known Ub-conjugating enzyme to catalyze K63-linked polyubiquitination, in which Uev serves as a regulatory subunit. The Arabidopsis thaliana genome contains four UEV1 genes that can be classified into two subfamilies (UEV1A/B and UEV1C/D), in which Uev1A/B have a C-terminal extension. Database analysis reveals that all higher plant genomes contain both subfamily UEV1s, which were evolved as early as angiosperm plants. Interestingly, all C-terminal tails in the Uev1A/B subfamily contain a putative prenylation motif, CaaX. Combined experimental results using AtUev1B demonstrated that it is most likely farnesylated and that its C-terminal tail, particularly the catalytic Cys residue in the CaaX motif, plays critical roles in protein-protein interaction, nuclear exclusion and membrane association. Using AtUev1B as bait for a yeast-two-hybrid screen, we identified 14 interaction proteins in a prenylation-dependent manner. These results collectively imply that prenylation of AtUev1A/B plays a critical role in its functional differentiation from AtUev1C/D.
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Affiliation(s)
- Qian Wang
- Beijing Key Laboratory of DNA Damage Responses and College of Life Sciences, Capital Normal University, Beijing, 100048, China; Shanxi Provincial People's Hospital, Taiyuan, Shanxi, 030012, China
| | - Maoqing Liu
- Beijing Key Laboratory of DNA Damage Responses and College of Life Sciences, Capital Normal University, Beijing, 100048, China
| | - Yuepeng Zang
- Beijing Key Laboratory of DNA Damage Responses and College of Life Sciences, Capital Normal University, Beijing, 100048, China
| | - Wei Xiao
- Beijing Key Laboratory of DNA Damage Responses and College of Life Sciences, Capital Normal University, Beijing, 100048, China; Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, SK, S7N 5E5, Canada.
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13
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Morgan NE, Cutrona MB, Simpson JC. Multitasking Rab Proteins in Autophagy and Membrane Trafficking: A Focus on Rab33b. Int J Mol Sci 2019; 20:ijms20163916. [PMID: 31408960 PMCID: PMC6719199 DOI: 10.3390/ijms20163916] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 07/30/2019] [Accepted: 08/09/2019] [Indexed: 12/25/2022] Open
Abstract
Autophagy (particularly macroautophagy) is a bulk degradation process used by eukaryotic cells in order to maintain adequate energy levels and cellular homeostasis through the delivery of long-lived proteins and organelles to the lysosome, resulting in their degradation. It is becoming increasingly clear that many of the molecular requirements to fulfil autophagy intersect with those of conventional and unconventional membrane trafficking pathways. Of particular interest is the dependence of these processes on multiple members of the Rab family of small GTP binding proteins. Rab33b is a protein that localises to the Golgi apparatus and has suggested functions in both membrane trafficking and autophagic processes. Interestingly, mutations in the RAB33B gene have been reported to cause the severe skeletal disorder, Smith–McCort Dysplasia; however, the molecular basis for Rab33b in this disorder remains to be determined. In this review, we focus on the current knowledge of the participation of Rab33b and its interacting partners in membrane trafficking and macroautophagy, and speculate on how its function, and dysfunction, may contribute to human disease.
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Affiliation(s)
- Niamh E Morgan
- School of Biology and Environmental Science & Conway Institute of Biomolecular and Biomedical Research, University College Dublin (UCD), D04 N2E5 Dublin, Ireland
| | - Meritxell B Cutrona
- School of Biology and Environmental Science & Conway Institute of Biomolecular and Biomedical Research, University College Dublin (UCD), D04 N2E5 Dublin, Ireland
| | - Jeremy C Simpson
- School of Biology and Environmental Science & Conway Institute of Biomolecular and Biomedical Research, University College Dublin (UCD), D04 N2E5 Dublin, Ireland.
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14
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Tower-Gilchrist C, Zlatic SA, Yu D, Chang Q, Wu H, Lin X, Faundez V, Chen P. Adaptor protein-3 complex is required for Vangl2 trafficking and planar cell polarity of the inner ear. Mol Biol Cell 2019; 30:2422-2434. [PMID: 31268833 PMCID: PMC6741063 DOI: 10.1091/mbc.e16-08-0592] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Planar cell polarity (PCP) regulates coordinated cellular polarity among neighboring cells to establish a polarity axis parallel to the plane of the tissue. Disruption in PCP results in a range of developmental anomalies and diseases. A key feature of PCP is the polarized and asymmetric localization of several membrane PCP proteins, which is essential to establish the polarity axis to orient cells coordinately. However, the machinery that regulates the asymmetric partition of PCP proteins remains largely unknown. In the present study, we show Van gogh-like 2 (Vangl2) in early and recycling endosomes as made evident by colocalization with diverse endosomal Rab proteins. Vangl2 biochemically interacts with adaptor protein-3 complex (AP-3). Using short hairpin RNA knockdown, we found that Vangl2 subcellular localization was modified in AP-3–depleted cells. Moreover, Vangl2 membrane localization within the cochlea is greatly reduced in AP-3–deficient mocha mice, which exhibit profound hearing loss. In inner ears from AP-3–deficient mocha mice, we observed PCP-dependent phenotypes, such as misorientation and deformation of hair cell stereociliary bundles and disorganization of hair cells characteristic of defects in convergent extension that is driven by PCP. These findings demonstrate a novel role of AP-3–mediated sorting mechanisms in regulating PCP proteins.
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Affiliation(s)
| | - Stephanie A Zlatic
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322
| | - Dehong Yu
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322.,Department of Otolaryngology-Head and Neck Surgery, Xinhua Hospital and Ear Institute, Shanghai Jiaotong University School of Medicine, Shanghai 200125, China
| | - Qing Chang
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322.,Department of Otolaryngology, Emory University School of Medicine, Atlanta, GA 30322
| | - Hao Wu
- Department of Otolaryngology-Head and Neck Surgery, Xinhua Hospital and Ear Institute, Shanghai Jiaotong University School of Medicine, Shanghai 200125, China
| | - Xi Lin
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322.,Department of Otolaryngology, Emory University School of Medicine, Atlanta, GA 30322
| | - Victor Faundez
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322
| | - Ping Chen
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322
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15
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Tucci M, Mannavola F, Passarelli A, Stucci LS, Cives M, Silvestris F. Exosomes in melanoma: a role in tumor progression, metastasis and impaired immune system activity. Oncotarget 2018; 9:20826-20837. [PMID: 29755693 PMCID: PMC5945529 DOI: 10.18632/oncotarget.24846] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 03/07/2018] [Indexed: 02/07/2023] Open
Abstract
Exosomes (Exo) are small vesicles produced by melanoma cells and the accessory cells of the tumor microenvironment. They emerge via both classical and direct pathways and actively participate in tumor colonisation of distant tissues. The proteins, nucleic acids, cytokines and growth factors engulfed by Exo are transferred to recipient cells, where they drive numerous functions required for the tumor escape from immune system control and tumor progression. By positively or negatively modulating immune cell properties, Exo provoke immune suppression and, in turn, defective dendritic cell (DC) functions. Together, these effects limit the cytotoxicity of T-cells and expand both T-regulatory and myeloid-derived suppressor populations. They also hinder perforin and granzyme production by natural killer cells. Finally, Exo also control the organotropism of melanoma cells. The distinct phenotypic properties of Exo can be exploited both for diagnostic purposes and in the early identification of melanoma patients likely to respond to immunotherapy. The potential therapeutic application of Exo derived from DCs has been demonstrated in vaccination trials, which showed an increase in anti-melanoma activity with respect to circulating tumor cells. However, additional studies are required before Exo can be effectively used in diagnostic and therapeutic applications in melanoma.
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Affiliation(s)
- Marco Tucci
- Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro, Bari, Italy
| | - Francesco Mannavola
- Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro, Bari, Italy
| | - Anna Passarelli
- Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro, Bari, Italy
| | - Luigia Stefania Stucci
- Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro, Bari, Italy
| | - Mauro Cives
- Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro, Bari, Italy
| | - Franco Silvestris
- Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro, Bari, Italy
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16
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Kevadiya BD, Woldstad C, Ottemann BM, Dash P, Sajja BR, Lamberty B, Morsey B, Kocher T, Dutta R, Bade AN, Liu Y, Callen SE, Fox HS, Byrareddy SN, McMillan JM, Bronich TK, Edagwa BJ, Boska MD, Gendelman HE. Multimodal Theranostic Nanoformulations Permit Magnetic Resonance Bioimaging of Antiretroviral Drug Particle Tissue-Cell Biodistribution. Theranostics 2018; 8:256-276. [PMID: 29290806 PMCID: PMC5743473 DOI: 10.7150/thno.22764] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Accepted: 10/06/2017] [Indexed: 01/23/2023] Open
Abstract
RATIONALE Long-acting slow effective release antiretroviral therapy (LASER ART) was developed to improve patient regimen adherence, prevent new infections, and facilitate drug delivery to human immunodeficiency virus cell and tissue reservoirs. In an effort to facilitate LASER ART development, "multimodal imaging theranostic nanoprobes" were created. These allow combined bioimaging, drug pharmacokinetics and tissue biodistribution tests in animal models. METHODS Europium (Eu3+)- doped cobalt ferrite (CF) dolutegravir (DTG)- loaded (EuCF-DTG) nanoparticles were synthesized then fully characterized based on their size, shape and stability. These were then used as platforms for nanoformulated drug biodistribution. RESULTS Folic acid (FA) decoration of EuCF-DTG (FA-EuCF-DTG) nanoparticles facilitated macrophage targeting and sped drug entry across cell barriers. Macrophage uptake was higher for FA-EuCF-DTG than EuCF-DTG nanoparticles with relaxivities of r2 = 546 mM-1s-1 and r2 = 564 mM-1s-1 in saline, and r2 = 850 mM-1s-1 and r2 = 876 mM-1s-1 in cells, respectively. The values were ten or more times higher than what was observed for ultrasmall superparamagnetic iron oxide particles (r2 = 31.15 mM-1s-1 in saline) using identical iron concentrations. Drug particles were detected in macrophage Rab compartments by dual fluorescence labeling. Replicate particles elicited sustained antiretroviral responses. After parenteral injection of FA-EuCF-DTG and EuCF-DTG into rats and rhesus macaques, drug, iron and cobalt levels, measured by LC-MS/MS, magnetic resonance imaging, and ICP-MS were coordinate. CONCLUSION We posit that these theranostic nanoprobes can assess LASER ART drug delivery and be used as part of a precision nanomedicine therapeutic strategy.
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Affiliation(s)
- Bhavesh D. Kevadiya
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | | | - Brendan M. Ottemann
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Prasanta Dash
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | | | - Benjamin Lamberty
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Brenda Morsey
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Ted Kocher
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Rinku Dutta
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Aditya N. Bade
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Yutong Liu
- Department of Radiology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Shannon E. Callen
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Howard S. Fox
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Siddappa N. Byrareddy
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - JoEllyn M. McMillan
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Tatiana K. Bronich
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, USA
| | - Benson J. Edagwa
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Michael D. Boska
- Department of Radiology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Howard E. Gendelman
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, USA
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17
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Surlis C, McNamara K, O'Hara E, Waters S, Beltman M, Cassidy J, Kenny D. Birth delivery method affects expression of immune genes in lung and jejunum tissue of neonatal beef calves. BMC Vet Res 2017; 13:391. [PMID: 29237479 PMCID: PMC5729508 DOI: 10.1186/s12917-017-1310-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 11/28/2017] [Indexed: 11/24/2022] Open
Abstract
Background Caesarean section is a routine veterinary obstetrical procedure employed to alleviate dystocia in cattle. However, CS, particularly before the onset of labour, is known to negatively affect neonatal respiration and metabolic adaptation in humans, though there is little published information for cattle. The aim of this study was to investigate the effect of elective caesarean section (ECS) or normal trans-vaginal (TV) delivery, on lung and jejunal gene expression profiles of neonatal calves. Results Paternal half-sib Angus calves (gestation length 278 + 1.8 d) were delivered either transvaginally (TV; n = 8) or by elective caesarean section (ECS; n = 9) and immediately euthanized. Lung and jejunum epithelial tissue was isolated and snap frozen. Total RNA was extracted using Trizol reagent and reverse transcribed to generate cDNA. For lung tissue, primers were designed to target genes involved in immunity, surfactant production, cellular detoxification, membrane transport and mucin production. Primers for jejunum tissue were chosen to target mucin production, immunoglobulin uptake, cortisol reaction and membrane trafficking. Quantitative real-time PCR reactions were performed and data were statistically analysed using mixed models ANOVA. In lung tissue the expression of five genes were affected (p < 0.05) by delivery method. Four of these genes were present at lower (LAP, CYP1A1, SCN11α and SCN11β) and one (MUC5AC) at higher abundance in ECS compared with TV calves. In jejunal tissue, expression of TNFα, Il-1β and 1 l-6 was higher in ECS compared with TV calves. Conclusions This novel study shows that ECS delivery affects the expression of key genes involved in the efficiency of the pulmonary liquid to air transition at birth, and may lead to an increased inflammatory response in jejunal tissue, which could compromise colostral immunoglobulin absorption. These findings are important to our understanding of the viability and management of neonatal calves born through ECS.
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Affiliation(s)
- Carla Surlis
- Animal and Grassland Research and Innovation Centre, Teagasc, Grange, Dunsany, Co. Meath, Ireland.
| | - Keelan McNamara
- Animal and Grassland Research and Innovation Centre, Teagasc, Grange, Dunsany, Co. Meath, Ireland
| | - Eoin O'Hara
- Animal and Grassland Research and Innovation Centre, Teagasc, Grange, Dunsany, Co. Meath, Ireland
| | - Sinead Waters
- Animal and Grassland Research and Innovation Centre, Teagasc, Grange, Dunsany, Co. Meath, Ireland
| | - Marijke Beltman
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - Joseph Cassidy
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - David Kenny
- Animal and Grassland Research and Innovation Centre, Teagasc, Grange, Dunsany, Co. Meath, Ireland.
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18
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Chichger H, Braza J, Duong H, Boni G, Harrington EO. Select Rab GTPases Regulate the Pulmonary Endothelium via Endosomal Trafficking of Vascular Endothelial-Cadherin. Am J Respir Cell Mol Biol 2017; 54:769-81. [PMID: 26551054 DOI: 10.1165/rcmb.2015-0286oc] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Pulmonary edema occurs in settings of acute lung injury, in diseases, such as pneumonia, and in acute respiratory distress syndrome. The lung interendothelial junctions are maintained in part by vascular endothelial (VE)-cadherin, an adherens junction protein, and its surface expression is regulated by endocytic trafficking. The Rab family of small GTPases are regulators of endocytic trafficking. The key trafficking pathways are regulated by Rab4, -7, and -9. Rab4 regulates the recycling of endosomes to the cell surface through a rapid-shuttle process, whereas Rab7 and -9 regulate trafficking to the late endosome/lysosome for degradation or from the trans-Golgi network to the late endosome, respectively. We recently demonstrated a role for the endosomal adaptor protein, p18, in regulation of the pulmonary endothelium through enhanced recycling of VE-cadherin to adherens junction. Thus, we hypothesized that Rab4, -7, and -9 regulate pulmonary endothelial barrier function through modulating trafficking of VE-cadherin-positive endosomes. We used Rab mutants with varying activities and associations to the endosome to study endothelial barrier function in vitro and in vivo. Our study demonstrates a key role for Rab4 activation and Rab9 inhibition in regulation of vascular permeability through enhanced VE-cadherin expression at the interendothelial junction. We further showed that endothelial barrier function mediated through Rab4 is dependent on extracellular signal-regulated kinase phosphorylation and activity. Thus, we demonstrate that Rab4 and -9 regulate VE-cadherin levels at the cell surface to modulate the pulmonary endothelium through extracellular signal-regulated kinase-dependent and -independent pathways, respectively. We propose that regulating select Rab GTPases represents novel therapeutic strategies for patients suffering with acute respiratory distress syndrome.
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Affiliation(s)
- Havovi Chichger
- Vascular Research Laboratory, Providence Veterans Affairs Medical Center, Providence, Rhode Island; and Department of Medicine, Alpert Medical School of Brown University, Providence, Rhode Island
| | - Julie Braza
- Vascular Research Laboratory, Providence Veterans Affairs Medical Center, Providence, Rhode Island; and Department of Medicine, Alpert Medical School of Brown University, Providence, Rhode Island
| | - Huetran Duong
- Vascular Research Laboratory, Providence Veterans Affairs Medical Center, Providence, Rhode Island; and Department of Medicine, Alpert Medical School of Brown University, Providence, Rhode Island
| | - Geraldine Boni
- Vascular Research Laboratory, Providence Veterans Affairs Medical Center, Providence, Rhode Island; and Department of Medicine, Alpert Medical School of Brown University, Providence, Rhode Island
| | - Elizabeth O Harrington
- Vascular Research Laboratory, Providence Veterans Affairs Medical Center, Providence, Rhode Island; and Department of Medicine, Alpert Medical School of Brown University, Providence, Rhode Island
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19
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Okamoto Y, Shikano S. Differential phosphorylation signals control endocytosis of GPR15. Mol Biol Cell 2017; 28:2267-2281. [PMID: 28615320 PMCID: PMC5555655 DOI: 10.1091/mbc.e16-09-0627] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 06/05/2017] [Accepted: 06/07/2017] [Indexed: 12/30/2022] Open
Abstract
GPR15 undergoes a ligand-independent endocytosis, which requires phosphorylation of a distal C-terminal Ser-357 mediated by multiple basophilic kinases. The functional role of Ser-357 in endocytosis is distinct from that of a conserved Ser/Thr cluster, which is more responsible for the use of GRKs and β-arrestin. GPR15 is an orphan G protein–coupled receptor (GPCR) that serves for an HIV coreceptor and was also recently found as a novel homing receptor for T-cells implicated in colitis. We show that GPR15 undergoes a constitutive endocytosis in the absence of ligand. The endocytosis was clathrin dependent and partially dependent on β-arrestin in HEK293 cells, and nearly half of the internalized GPR15 receptors were recycled to the plasma membrane. An Ala mutation of the distal C-terminal Arg-354 or Ser-357, which forms a consensus phosphorylation site for basophilic kinases, markedly reduced the endocytosis, whereas phosphomimetic mutation of Ser-357 to Asp did not. Ser-357 was phosphorylated in vitro by multiple kinases, including PKA and PKC, and pharmacological activation of these kinases enhanced both phosphorylation of Ser-357 and endocytosis of GPR15. These results suggested that Ser-357 phosphorylation critically controls the ligand-independent endocytosis of GPR15. The functional role of Ser-357 in endocytosis was distinct from that of a conserved Ser/Thr cluster in the more proximal C-terminus, which was responsible for the β-arrestin– and GPCR kinase–dependent endocytosis of GPR15. Thus phosphorylation signals may differentially control cell surface density of GPR15 through endocytosis.
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Affiliation(s)
- Yukari Okamoto
- Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago, Chicago, IL 60607-7170
| | - Sojin Shikano
- Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago, Chicago, IL 60607-7170
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20
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de Souza EE, Hehnly H, Perez AM, Meirelles GV, Smetana JHC, Doxsey S, Kobarg J. Human Nek7-interactor RGS2 is required for mitotic spindle organization. Cell Cycle 2015; 14:656-67. [PMID: 25664600 DOI: 10.4161/15384101.2014.994988] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The mitotic spindle apparatus is composed of microtubule (MT) networks attached to kinetochores organized from 2 centrosomes (a.k.a. spindle poles). In addition to this central spindle apparatus, astral MTs assemble at the mitotic spindle pole and attach to the cell cortex to ensure appropriate spindle orientation. We propose that cell cycle-related kinase, Nek7, and its novel interacting protein RGS2, are involved in mitosis regulation and spindle formation. We found that RGS2 localizes to the mitotic spindle in a Nek7-dependent manner, and along with Nek7 contributes to spindle morphology and mitotic spindle pole integrity. RGS2-depletion leads to a mitotic-delay and severe defects in the chromosomes alignment and congression. Importantly, RGS2 or Nek7 depletion or even overexpression of wild-type or kinase-dead Nek7, reduced γ-tubulin from the mitotic spindle poles. In addition to causing a mitotic delay, RGS2 depletion induced mitotic spindle misorientation coinciding with astral MT-reduction. We propose that these phenotypes directly contribute to a failure in mitotic spindle alignment to the substratum. In conclusion, we suggest a molecular mechanism whereupon Nek7 and RGS2 may act cooperatively to ensure proper mitotic spindle organization.
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Key Words
- CREST, calcium-responsive transactivator
- EB1, end-binding protein 1
- GAP, GTPase-activating protein
- MT, microtubule
- Nek, NIMA-related kinase
- Nek7
- PCM, centrosomal pericentriolar material
- PD, pull-down
- PPI, protein-protein interaction
- RGS, regulators of G protein signaling
- RGS2
- WB, Western blotting
- cell division
- mitotic spindle
- mitotic spindle orientation
- shRNA, short-interfering RNA
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Affiliation(s)
- Edmarcia Elisa de Souza
- a Laboratório Nacional de Biociências-LNBio ; Centro Nacional de Pesquisa em Energia e Materiais-CNPEM ; Campinas , SP Brasil
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21
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Bastin G, Yang JY, Heximer SP. Gαi3-Dependent Inhibition of JNK Activity on Intracellular Membranes. Front Bioeng Biotechnol 2015; 3:128. [PMID: 26389115 PMCID: PMC4555961 DOI: 10.3389/fbioe.2015.00128] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 08/13/2015] [Indexed: 12/11/2022] Open
Abstract
Heterotrimeric G-protein signaling has been shown to modulate a wide variety of intracellular signaling pathways, including the mitogen-activated protein kinase (MAPK) family. The activity of one MAPK family class, c-Jun N-terminal kinases (JNKs), has been traditionally linked to the activation of G-protein coupled receptors (GPCRs) at the plasma membrane. Using a unique set of G-protein signaling tools developed in our laboratory, we show that subcellular domain-specific JNK activity is inhibited by the activation of Gαi3, the Gαi isoform found predominantly within intracellular membranes, such as the endoplasmic reticulum (ER)–Golgi interface, and their associated vesicle pools. Regulators of intracellular Gαi3, including activator of G-protein signaling 3 (AGS3) and the regulator of G-protein signaling protein 4 (RGS4), have a marked impact on the regulation of JNK activity. Together, these data support the existence of unique intracellular signaling complexes that control JNK activity deep within the cell. This work highlights some of the cellular pathways that are regulated by these intracellular complexes and identifies potential strategies for their regulation in mammalian cells.
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Affiliation(s)
- Guillaume Bastin
- Department of Physiology, Heart and Stroke, Richard Lewar Centre of Excellence in Cardiovascular Research, University of Toronto , Toronto, ON , Canada
| | - Jin Ye Yang
- Department of Physiology, Heart and Stroke, Richard Lewar Centre of Excellence in Cardiovascular Research, University of Toronto , Toronto, ON , Canada
| | - Scott P Heximer
- Department of Physiology, Heart and Stroke, Richard Lewar Centre of Excellence in Cardiovascular Research, University of Toronto , Toronto, ON , Canada
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22
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Tsai SY, Segovia JA, Chang TH, Shil NK, Pokharel SM, Kannan TR, Baseman JB, Defrêne J, Pagé N, Cesaro A, Tessier PA, Bose S. Regulation of TLR3 Activation by S100A9. THE JOURNAL OF IMMUNOLOGY 2015; 195:4426-37. [PMID: 26385519 DOI: 10.4049/jimmunol.1500378] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 08/18/2015] [Indexed: 12/18/2022]
Abstract
Recognition of viral dsRNA by endosomal TLR3 activates innate immune response during virus infection. Trafficking of TLR3 to the endolysosomal compartment arising from fusion of late endosome (LE) with lysosome is required for recognition and detection of pathogen associated molecular patterns, which results in activation of the TLR3-dependent signaling cascade. Existing knowledge about the mechanism(s) and cellular factor(s) governing TLR3 trafficking is limited. In the current study, we identified intracellular S100A9 protein as a critical regulator of TLR3 trafficking. S100A9 was required for maturation of TLR3 containing early endosome (EE) into LE, the compartment that fuses with lysosome to form the endolysosomal compartment. A drastic reduction in cytokine production was observed in S100A9-knockout (KO) primary macrophages following RNA virus infection and treatment of cells with polyinosinic-polycytidylic acid (polyIC; a dsRNA mimetic that acts as a TLR3 agonist). Mechanistic studies revealed colocalization and interaction of S100A9 with TLR3 following polyIC treatment. S100A9-TLR3 interaction was critical for maturation of TLR3 containing EE into LE because TLR3 could not be detected in the LE of polyIC-treated S100A9-KO macrophages. Subsequently, TLR3 failed to colocalize with its agonist (i.e., biotin-labeled polyIC) in S100A9-deficient macrophages. The in vivo physiological role of S100A9 was evident from loss of cytokine production in polyIC-treated S100A9-KO mice. Thus, we identified intracellular S100A9 as a regulator of TLR3 signaling and demonstrated that S100A9 functions during pre-TLR3 activation stages by facilitating maturation of TLR3 containing EE into LE.
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Affiliation(s)
- Su-Yu Tsai
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164; Department of Microbiology and Immunology, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229
| | - Jesus A Segovia
- Department of Microbiology and Immunology, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229
| | - Te-Hung Chang
- Department of Microbiology and Immunology, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229
| | - Niraj K Shil
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164
| | - Swechha M Pokharel
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164
| | - T R Kannan
- Department of Microbiology and Immunology, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229
| | - Joel B Baseman
- Department of Microbiology and Immunology, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229
| | - Joan Defrêne
- Axe Maladies Infectieuses et Immunitaires, Centre de Recherche du Centre Hospitalier Universitaire de Québec, Faculté de Médecine, Université Laval, Quebec, Quebec G1V 4G2, Canada; and
| | - Nathalie Pagé
- Axe Maladies Infectieuses et Immunitaires, Centre de Recherche du Centre Hospitalier Universitaire de Québec, Faculté de Médecine, Université Laval, Quebec, Quebec G1V 4G2, Canada; and
| | - Annabelle Cesaro
- Axe Maladies Infectieuses et Immunitaires, Centre de Recherche du Centre Hospitalier Universitaire de Québec, Faculté de Médecine, Université Laval, Quebec, Quebec G1V 4G2, Canada; and Collegium Sciences et Techniques, Université d'Orléans, 45100 Orléans, France
| | - Philippe A Tessier
- Axe Maladies Infectieuses et Immunitaires, Centre de Recherche du Centre Hospitalier Universitaire de Québec, Faculté de Médecine, Université Laval, Quebec, Quebec G1V 4G2, Canada; and
| | - Santanu Bose
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164;
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Yan CH, Li Y, Tian XX, Zhu N, Song HX, Zhang J, Sun MY, Han YL. CREG1 ameliorates myocardial fibrosis associated with autophagy activation and Rab7 expression. Biochim Biophys Acta Mol Basis Dis 2015; 1852:353-64. [PMID: 25774384 DOI: 10.1016/j.bbadis.2014.05.027] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In cardiomyocytes subjected to stress, autophagy activation is a critical survival mechanism that preserves cellular energy status while degrading damaged proteins and organelles. However, little is known about the mechanisms that govern this autophagic response. Cellular repressor of E1A genes (CREG1) is an evolutionarily conserved lysosomal protein, and an important new factor in regulating tissues homeostasis that has been shown to antagonize injury of tissues or cells. In the present study, we aimed to investigate the regulatory role of CREG1 in cardiac autophagy, and to clarify autophagy activation mechanisms. First, we generated a CREG1 haploinsufficiency (Creg1(+/-)) mouse model, and identified that CREG1 deficiency aggravates myocardial fibrosis in response to aging or angiotensin II (Ang II). Conversely, exogenous infusion of recombinant CREG1 protein complete reversed cardiac damage. CERG1 deficiency in Creg1(+/-) mouse heart showed a market accumulation of autophagosome that acquired LC3II and beclin-1, and a decrease in autophagic flux clearance as indicated by upregulating the level of p62. Inversely, restoration of CREG1 activates cardiac autophagy, Furthermore, chloroquine, an inhibitor of lysosomal acidification, was used to confirm that CREG1 protected the heart tissue against Ang II-induced fibrosis by activating autophagy. Using adenoviral infection of primary cardiomyocytes, overexpression of CREG1 with concurrent resveratrol treatment significantly increased autophagy, while silencing CREG1 blocked the resveratrol-induced autophagy. These results suggest that CREG1-induced autophagy is required to maintain heart function in the face of stress-induced myocardiac damage. Both in vitro and in vivo studies identified that CREG1 deficiency influenced the maturation of lysosomes and reduced the espression of Rab7, which might be involved in CREG1-induced cardiomyocyte autophagy. These findings suggest that autophagy activation via CREG1 may be a viable therapeutic strategy autophagy for improving cardiac performance under pathologic conditions. This article is part of a Special Issue entitled: autophagy and protein quality control in cardiometabolic diseases.
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Valproic Acid Influences MTNR1A Intracellular Trafficking and Signaling in a β-Arrestin 2-Dependent Manner. Mol Neurobiol 2015; 53:1237-1246. [DOI: 10.1007/s12035-014-9085-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Accepted: 12/29/2014] [Indexed: 10/24/2022]
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Araínga M, Guo D, Wiederin J, Ciborowski P, McMillan J, Gendelman HE. Opposing regulation of endolysosomal pathways by long-acting nanoformulated antiretroviral therapy and HIV-1 in human macrophages. Retrovirology 2015; 12:5. [PMID: 25608975 PMCID: PMC4307176 DOI: 10.1186/s12977-014-0133-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Accepted: 12/19/2014] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND Long-acting nanoformulated antiretroviral therapy (nanoART) is designed to improve patient regimen adherence, reduce systemic drug toxicities, and facilitate clearance of human immunodeficiency virus type one (HIV-1) infection. While nanoART establishes drug depots within recycling and late monocyte-macrophage endosomes, whether or not this provides a strategic advantage towards viral elimination has not been elucidated. RESULTS We applied quantitative SWATH-MS proteomics and cell profiling to nanoparticle atazanavir (nanoATV)-treated and HIV-1 infected human monocyte-derived macrophages (MDM). Native ATV and uninfected cells served as controls. Both HIV-1 and nanoATV engaged endolysosomal trafficking for assembly and depot formation, respectively. Notably, the pathways were deregulated in opposing manners by the virus and the nanoATV, likely by viral clearance. Paired-sample z-scores, of the proteomic data sets, showed up- and down- regulation of Rab-linked endolysosomal proteins. NanoART and native ATV treated uninfected cells showed limited effects. The data was confirmed by Western blot. DAVID and KEGG bioinformatics analyses of proteomic data showed relationships between secretory, mobility and phagocytic cell functions and virus and particle trafficking. CONCLUSIONS We posit that modulation of endolysosomal pathways by antiretroviral nanoparticles provides a strategic path to combat HIV infection.
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Affiliation(s)
- Mariluz Araínga
- />Departments of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, 985880 Nebraska Medical Center, Omaha, NE 68198-5880 USA
| | - Dongwei Guo
- />Departments of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, 985880 Nebraska Medical Center, Omaha, NE 68198-5880 USA
- />Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE 68198-5880 USA
| | - Jayme Wiederin
- />Departments of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, 985880 Nebraska Medical Center, Omaha, NE 68198-5880 USA
| | - Pawel Ciborowski
- />Departments of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, 985880 Nebraska Medical Center, Omaha, NE 68198-5880 USA
| | - JoEllyn McMillan
- />Departments of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, 985880 Nebraska Medical Center, Omaha, NE 68198-5880 USA
| | - Howard E Gendelman
- />Departments of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, 985880 Nebraska Medical Center, Omaha, NE 68198-5880 USA
- />Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE 68198-5880 USA
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26
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D'Adamo P, Masetti M, Bianchi V, Morè L, Mignogna ML, Giannandrea M, Gatti S. RAB GTPases and RAB-interacting proteins and their role in the control of cognitive functions. Neurosci Biobehav Rev 2014; 46 Pt 2:302-14. [PMID: 24412241 DOI: 10.1016/j.neubiorev.2013.12.009] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Revised: 11/15/2013] [Accepted: 12/16/2013] [Indexed: 12/18/2022]
Abstract
A RAS-related class of small monomeric G proteins, the RAB GTPases, is emerging as of key biological importance in compartment specific directional control of vesicles formation, transport and fusion. Thanks to human genetic observation and to the consequent dedicated biochemical work, substantial progress has been made on the understanding of the role played by RAB GTPases and their effector proteins on neuronal development and the shaping of cognitive functions. This review is highlighting these initial elements to broaden the current scope of research on developmental cognitive deficits and take the point of view of RAB GTPases control on membrane transport in neurons and astrocytes.
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Affiliation(s)
- Patrizia D'Adamo
- Dulbecco Telethon Institute at San Raffaele Scientific Institute, Division of Neuroscience, via Olgettina 58, 20132 Milan, Italy; Vita-Salute San Raffaele University, via Olgettina 58, 20132 Milan, Italy.
| | - Michela Masetti
- Dulbecco Telethon Institute at San Raffaele Scientific Institute, Division of Neuroscience, via Olgettina 58, 20132 Milan, Italy
| | - Veronica Bianchi
- Dulbecco Telethon Institute at San Raffaele Scientific Institute, Division of Neuroscience, via Olgettina 58, 20132 Milan, Italy; Vita-Salute San Raffaele University, via Olgettina 58, 20132 Milan, Italy
| | - Lorenzo Morè
- Dulbecco Telethon Institute at San Raffaele Scientific Institute, Division of Neuroscience, via Olgettina 58, 20132 Milan, Italy
| | - Maria Lidia Mignogna
- Dulbecco Telethon Institute at San Raffaele Scientific Institute, Division of Neuroscience, via Olgettina 58, 20132 Milan, Italy; Vita-Salute San Raffaele University, via Olgettina 58, 20132 Milan, Italy
| | - Maila Giannandrea
- Dulbecco Telethon Institute at San Raffaele Scientific Institute, Division of Neuroscience, via Olgettina 58, 20132 Milan, Italy; F. Hoffmann-La Roche AG, pRED Pharma Research & Early Development, DTA Neuroscience Grenzacherstrasse 124, Basel CH4070, Switzerland
| | - Silvia Gatti
- F. Hoffmann-La Roche AG, pRED Pharma Research & Early Development, DTA Neuroscience Grenzacherstrasse 124, Basel CH4070, Switzerland
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