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Fazazi MR, Doss PMIA, Pereira R, Fudge N, Regmi A, Joly-Beauparlant C, Akbar I, Yeola AP, Mailhot B, Baillargeon J, Grenier P, Bertrand N, Lacroix S, Droit A, Moore CS, Rojas OL, Rangachari M. Myelin-reactive B cells exacerbate CD4 + T cell-driven CNS autoimmunity in an IL-23-dependent manner. Nat Commun 2024; 15:5404. [PMID: 38926356 PMCID: PMC11208426 DOI: 10.1038/s41467-024-49259-0] [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: 09/28/2023] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
B cells and T cells collaborate in multiple sclerosis (MS) pathogenesis. IgH[MOG] mice possess a B cell repertoire skewed to recognize myelin oligodendrocyte glycoprotein (MOG). Here, we show that upon immunization with the T cell-obligate autoantigen, MOG[35-55], IgH[MOG] mice develop rapid and exacerbated experimental autoimmune encephalomyelitis (EAE) relative to wildtype (WT) counterparts, characterized by aggregation of T and B cells in the IgH[MOG] meninges and by CD4+ T helper 17 (Th17) cells in the CNS. Production of the Th17 maintenance factor IL-23 is observed from IgH[MOG] CNS-infiltrating and meningeal B cells, and in vivo blockade of IL-23p19 attenuates disease severity in IgH[MOG] mice. In the CNS parenchyma and dura mater of IgH[MOG] mice, we observe an increased frequency of CD4+PD-1+CXCR5- T cells that share numerous characteristics with the recently described T peripheral helper (Tph) cell subset. Further, CNS-infiltrating B and Tph cells from IgH[MOG] mice show increased reactive oxygen species (ROS) production. Meningeal inflammation, Tph-like cell accumulation in the CNS and B/Tph cell production of ROS were all reduced upon p19 blockade. Altogether, MOG-specific B cells promote autoimmune inflammation of the CNS parenchyma and meninges in an IL-23-dependent manner.
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Affiliation(s)
- Mohamed Reda Fazazi
- axe Neurosciences, Centre de recherche du Centre hospitalier universitaire (CHU) de Québec - Université Laval, Pavillon CHUL, 2705 boul Laurier, Quebec City, G1V 4G2, QC, Canada
| | - Prenitha Mercy Ignatius Arokia Doss
- axe Neurosciences, Centre de recherche du Centre hospitalier universitaire (CHU) de Québec - Université Laval, Pavillon CHUL, 2705 boul Laurier, Quebec City, G1V 4G2, QC, Canada
| | - Resel Pereira
- Krembil Research Institute, University Health Network, Toronto, M5T 0S8, ON, Canada
| | - Neva Fudge
- Division of BioMedical Sciences, Memorial University of Newfoundland, St. John's, NL, A1B 3V6, Canada
- Department of Neurology, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, A1B 3V6, Canada
| | - Aryan Regmi
- Krembil Research Institute, University Health Network, Toronto, M5T 0S8, ON, Canada
- Department of Immunology, University of Toronto, Toronto, M5S 1A1, ON, Canada
| | - Charles Joly-Beauparlant
- axe Endocrinologie et nephrologie, Centre de recherche du Centre hospitalier universitaire (CHU) de Québec - Université Laval, Pavillon CHUL, 2705 boul Laurier, Quebec City, QC, G1V 4G2, Canada
| | - Irshad Akbar
- axe Neurosciences, Centre de recherche du Centre hospitalier universitaire (CHU) de Québec - Université Laval, Pavillon CHUL, 2705 boul Laurier, Quebec City, G1V 4G2, QC, Canada
| | - Asmita Pradeep Yeola
- axe Neurosciences, Centre de recherche du Centre hospitalier universitaire (CHU) de Québec - Université Laval, Pavillon CHUL, 2705 boul Laurier, Quebec City, G1V 4G2, QC, Canada
| | - Benoit Mailhot
- axe Neurosciences, Centre de recherche du Centre hospitalier universitaire (CHU) de Québec - Université Laval, Pavillon CHUL, 2705 boul Laurier, Quebec City, G1V 4G2, QC, Canada
| | - Joanie Baillargeon
- axe Neurosciences, Centre de recherche du Centre hospitalier universitaire (CHU) de Québec - Université Laval, Pavillon CHUL, 2705 boul Laurier, Quebec City, G1V 4G2, QC, Canada
| | - Philippe Grenier
- axe Endocrinologie et nephrologie, Centre de recherche du Centre hospitalier universitaire (CHU) de Québec - Université Laval, Pavillon CHUL, 2705 boul Laurier, Quebec City, QC, G1V 4G2, Canada
| | - Nicolas Bertrand
- axe Endocrinologie et nephrologie, Centre de recherche du Centre hospitalier universitaire (CHU) de Québec - Université Laval, Pavillon CHUL, 2705 boul Laurier, Quebec City, QC, G1V 4G2, Canada
- Faculty of Pharmacy, Laval University, 1050 ave de la Médecine, Quebec City, QC, G1V 4G2, Canada
| | - Steve Lacroix
- axe Neurosciences, Centre de recherche du Centre hospitalier universitaire (CHU) de Québec - Université Laval, Pavillon CHUL, 2705 boul Laurier, Quebec City, G1V 4G2, QC, Canada
- Department of Molecular Medicine, Faculty of Medicine, Laval University, 1050 ave de la Médecine, Quebec City, QC, G1V 4G2, Canada
| | - Arnaud Droit
- axe Endocrinologie et nephrologie, Centre de recherche du Centre hospitalier universitaire (CHU) de Québec - Université Laval, Pavillon CHUL, 2705 boul Laurier, Quebec City, QC, G1V 4G2, Canada
- Department of Molecular Medicine, Faculty of Medicine, Laval University, 1050 ave de la Médecine, Quebec City, QC, G1V 4G2, Canada
| | - Craig S Moore
- Division of BioMedical Sciences, Memorial University of Newfoundland, St. John's, NL, A1B 3V6, Canada
- Department of Neurology, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, A1B 3V6, Canada
| | - Olga L Rojas
- Krembil Research Institute, University Health Network, Toronto, M5T 0S8, ON, Canada
- Department of Immunology, University of Toronto, Toronto, M5S 1A1, ON, Canada
| | - Manu Rangachari
- axe Neurosciences, Centre de recherche du Centre hospitalier universitaire (CHU) de Québec - Université Laval, Pavillon CHUL, 2705 boul Laurier, Quebec City, G1V 4G2, QC, Canada.
- Department of Molecular Medicine, Faculty of Medicine, Laval University, 1050 ave de la Médecine, Quebec City, QC, G1V 4G2, Canada.
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Gurunathan S, Thangaraj P, Das J, Kim JH. Antibacterial and antibiofilm effects of Pseudomonas aeruginosa derived outer membrane vesicles against Streptococcus mutans. Heliyon 2023; 9:e22606. [PMID: 38125454 PMCID: PMC10730581 DOI: 10.1016/j.heliyon.2023.e22606] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 11/09/2023] [Accepted: 11/15/2023] [Indexed: 12/23/2023] Open
Abstract
Antimicrobial resistance (AMR) is a serious and most urgent global threat to human health. AMR is one of today's biggest difficulties in the health system and has the potential to harm people at any stage of life, making it a severe public health issue. There must be fewer antimicrobial medicines available to treat diseases given the rise in antibiotic-resistant organisms. If no new drugs are created or discovered, it is predicted that there won't be any effective antibiotics accessible by 2050. In most cases, Streptococcus increased antibiotic resistance by forming biofilms, which account for around 80 % of all microbial infections in humans. This highlights the need to look for new strategies to manage diseases that are resistant to antibiotics. Therefore, development alternative, biocompatible and high efficacy new strategies are essential to overcome drug resistance. Recently, bacterial derived extracellular vesicles have been applied to tackle infection and reduce the emergence of drug resistance. Therefore, the objective of the current study was designed to assess the antibacterial and antibiofilm potential of outer membrane vesicles (OMVs) derived from Pseudomonas aeruginosa againstStreptococcus mutans. According to the findings of this investigation, the pure P. aeruginosa outer membrane vesicles (PAOMVs) display a size of 100 nm. S. mutans treated with PAOMVs showed significant antibacterial and antibiofilm activity. The mechanistic studies revealed that PAOMVs induce cell death through excessive generation of reactive oxygen species and imbalance of redox leads to lipid peroxidation, decreased level of antioxidant markers including glutathione, superoxide dismutase and catalase. Further this study confirmed that PAOMVs significantly impairs metabolic activity through inhibiting lactate dehydrogenase activity (LDH), adenosine triphosphate (ATP) production, leakage of proteins and sugars. Interestingly, combination of sub-lethal concentrations of PAOMVs and antibiotics enhances cell death and biofilm formation of S. mutans. Altogether, this work, may serve as an important basis for further evaluation of PAOMVs as novel therapeutic agents against bacterial infections.
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Affiliation(s)
- Sangiliyandi Gurunathan
- Department of Biotechnology, Rathinam College of Arts and Science, Rathinam Techzone Campus, Eachanari, Coimbatore, 641 021, Tamil Nadu, India
| | - Pratheep Thangaraj
- Department of Biotechnology, Rathinam College of Arts and Science, Rathinam Techzone Campus, Eachanari, Coimbatore, 641 021, Tamil Nadu, India
| | - Joydeep Das
- Department of Chemistry, Mizoram University, Aizawl, 796 004, Mizoram, India
| | - Jin-Hoi Kim
- Department of Stem Cell and Regenerative Biotechnology, Konkuk University, Seoul, 05029, South Korea
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Wu S, Edskes HK, Wickner RB. Human proteins curing yeast prions. Proc Natl Acad Sci U S A 2023; 120:e2314781120. [PMID: 37903258 PMCID: PMC10636303 DOI: 10.1073/pnas.2314781120] [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: 08/25/2023] [Accepted: 09/25/2023] [Indexed: 11/01/2023] Open
Abstract
Recognition that common human amyloidoses are prion diseases makes the use of the Saccharomyces cerevisiae prion model systems to screen for possible anti-prion components of increasing importance. [PSI+] and [URE3] are amyloid-based prions of Sup35p and Ure2p, respectively. Yeast has at least six anti-prion systems that together cure nearly all [PSI+] and [URE3] prions arising in their absence. We made a GAL-promoted bank of 14,913 human open reading frames in a yeast shuttle plasmid and isolated 20 genes whose expression cures [PSI+] or [URE3]. PRPF19 is an E3 ubiquitin ligase that cures [URE3] if its U-box is intact. DNAJA1 is a J protein that cures [PSI+] unless its interaction with Hsp70s is defective. Human Bag5 efficiently cures [URE3] and [PSI+]. Bag family proteins share a 110 to 130 residue "BAG domain"; Bag 1, 2, 3, 4, and 6 each have one BAG domain while Bag5 has five BAG domains. Two BAG domains are necessary for curing [PSI+], but one can suffice to cure [URE3]. Although most Bag proteins affect autophagy in mammalian cells, mutations blocking autophagy in yeast do not affect Bag5 curing of [PSI+] or [URE3]. Curing by Bag proteins depends on their interaction with Hsp70s, impairing their role, with Hsp104 and Sis1, in the amyloid filament cleavage necessary for prion propagation. Since Bag5 curing is reduced by overproduction of Sis1, we propose that Bag5 cures prions by blocking Sis1 access to Hsp70s in its role with Hsp104 in filament cleavage.
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Affiliation(s)
- Songsong Wu
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, MD20892-0830
| | - Herman K. Edskes
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, MD20892-0830
| | - Reed B. Wickner
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, MD20892-0830
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Gupta MK, Randhawa PK, Masternak MM. Role of BAG5 in Protein Quality Control: Double-Edged Sword? FRONTIERS IN AGING 2022; 3:844168. [PMID: 35821856 PMCID: PMC9261338 DOI: 10.3389/fragi.2022.844168] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 02/08/2022] [Indexed: 11/15/2022]
Abstract
Cardiovascular disorder is the major health burden and cause of death among individuals worldwide. As the cardiomyocytes lack the ability for self-renewal, it is utmost necessary to surveil the protein quality in the cells. The Bcl-2 associated anthanogene protein (BAG) family and molecular chaperones (HSP70, HSP90) actively participate in maintaining cellular protein quality control (PQC) to limit cellular dysfunction in the cells. The BAG family contains a unique BAG domain which facilitates their interaction with the ATPase domain of the heat shock protein 70 (HSP70) to assist in protein folding. Among the BAG family members (BAG1-6), BAG5 protein is unique since it has five domains in tandem, and the binding of BD5 induces certain conformational changes in the nucleotide-binding domain (NBD) of HSP70 such that it loses its affinity for binding to ADP and results in enhanced protein refolding activity of HSP70. In this review, we shall describe the role of BAG5 in modulating mitophagy, endoplasmic stress, and cellular viability. Also, we have highlighted the interaction of BAG5 with other proteins, including PINK, DJ-1, CHIP, and their role in cellular PQC. Apart from this, we have described the role of BAG5 in cellular metabolism and aging.
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Acute social isolation and regrouping cause short- and long-term molecular changes in the rat medial amygdala. Mol Psychiatry 2022; 27:886-895. [PMID: 34650208 PMCID: PMC8515782 DOI: 10.1038/s41380-021-01342-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 09/22/2021] [Accepted: 10/01/2021] [Indexed: 12/20/2022]
Abstract
Social isolation poses a severe mental and physiological burden on humans. Most animal models that investigate this effect are based on prolonged isolation, which does not mimic the milder conditions experienced by people in the real world. We show that in adult male rats, acute social isolation causes social memory loss. This memory loss is accompanied by significant changes in the expression of specific mRNAs and proteins in the medial amygdala, a brain structure that is crucial for social memory. These changes particularly involve the neurotrophic signaling and axon guidance pathways that are associated with neuronal network remodeling. Upon regrouping, memory returns, and most molecular changes are reversed within hours. However, the expression of some genes, especially those associated with neurodegenerative diseases remain modified for at least a day longer. These results suggest that acute social isolation and rapid resocialization, as experienced by millions during the COVID-19 pandemic, are sufficient to induce significant changes to neuronal networks, some of which may be pathological.
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Su L, Li R, Zhang Z, Liu J, Du J, Wei H. Identification of altered exosomal microRNAs and mRNAs in Alzheimer's disease. Ageing Res Rev 2022; 73:101497. [PMID: 34710587 DOI: 10.1016/j.arr.2021.101497] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 10/18/2021] [Accepted: 10/19/2021] [Indexed: 12/15/2022]
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disease characterized by decreased memory and cognitive functions. Exosomes carry a variety of important information such as proteins, lipids, DNA and RNA of mother cells. It is reported that exosomes play critical roles in nervous system physiology and neurodegenerative diseases. However, the functions of exosomes in AD progression are not fully elucidated. In this study, we detected the expression pattern of mRNAs and miRNAs in exosomes derived from the AD and health mice. A total of 1320 mRNAs and 29 miRNAs were differentially expressed in exosomes between the two groups. Subsequently, the downregulation of Chi3l1 and upregulation of Rhog in AD mice were verified by qRT-PCR. Meanwhile, the downregulation of miR-148a-5p and upregulation of miR-27a-5p in AD group were also tested by qRT-PCR. The functions of differentially expressed mRNAs and potential target genes of miRNAs were determined by GO and KEGG analysis. According to the ceRNA hypothesis, we established an integrated ceRNA network of circRNA-lncRNA-miRNA-mRNA. In conclusion, exosomal lncRNAs, mRNAs, circRNAs and miRNAs were identified to participate in the progression of AD which might be possible biomarkers and therapeutic targets for AD.
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Affiliation(s)
- Lining Su
- Department of Basic Medicine, Hebei North University, Zhangjiakou, China.
| | - Renqing Li
- Department of Basic Medicine, Hebei North University, Zhangjiakou, China.
| | - Zhiqing Zhang
- Department of Basic Medicine, Hebei North University, Zhangjiakou, China.
| | - Jijia Liu
- Department of Basic Medicine, Hebei North University, Zhangjiakou, China.
| | - Jingkao Du
- Department of Basic Medicine, Hebei North University, Zhangjiakou, China.
| | - Huiping Wei
- Department of Basic Medicine, Hebei North University, Zhangjiakou, China.
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Wang M, Wei J, Ji T, Zang K. miRNA-770-5p expression is upregulated in patients with type 2 diabetes and miRNA-770-5p knockdown protects pancreatic β-cell function via targeting BAG5 expression. Exp Ther Med 2021; 22:664. [PMID: 33986829 PMCID: PMC8112148 DOI: 10.3892/etm.2021.10096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 10/26/2020] [Indexed: 11/06/2022] Open
Abstract
MicroRNA (miR)-770-5p expression is increased in patients with type 2 diabetes mellitus (T2DM) compared with healthy controls; however, the roles and molecular mechanism underlying miR-770-5p in T2DM are not completely understood. In the present study, the reverse transcription-quantitative PCR (RT-qPCR) results indicated that miR-770-5p expression was significantly increased and Bcl-2 associated athanogene 5 (BAG5) expression was significantly decreased in the serum of patients with T2DM compared with healthy volunteers. TargetScan and a dual luciferase reporter gene system were used to predict and verify BAG5 as a target gene of miR-770-5p. Additionally, the RT-qPCR results demonstrated that miR-770-5p expression was significantly increased and BAG5 expression was significantly decreased in uric acid (UA)-treated Min6 cells compared with control cells. Min6 cells were transfected with miR-770-5p inhibitor and BAG5-small interfering (si)RNA to alter expression levels. The results indicated that miR-770-5p negatively regulated BAG5. The effect of miR-770-5p knockdown on UA-induced pancreatic β-cell damage and dysfunction was subsequently assessed. Min6 cells were transfected with miR-770-5p inhibitor or miR-770-5p inhibitor + BAG5-siRNA for 48 h, followed by treatment with or without 5 mg/dl UA for 24 h. Cell viability, apoptosis, apoptosis-related factor expression levels and insulin secretion were assessed. The results demonstrated that UA treatment significantly reduced cell viability, increased cell apoptosis and reduced insulin secretion in Min6 cells compared with the control group. miR-770-5p inhibitor significantly attenuated UA-induced injury and dysfunction of Min6 cells, whereas BAG5 knockdown abolished the protective effects of miR-770-5p inhibitor on UA-damaged Min6 cells. In conclusion, miR-770-5p was highly expressed in the serum of patients with T2DM compared with healthy volunteers. In UA-treated pancreatic β-cells, compared with the inhibitor control group, miR-770-5p knockdown regulated the expression of apoptosis-related genes, increased cell viability, inhibited cell apoptosis and increased insulin secretion by targeting BAG5. Therefore, the present study suggested that miR-770-5p inhibitor may serve a protective role in T2DM.
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Affiliation(s)
- Min Wang
- Department of Critical Care Medicine, The First Affiliated Huai'an People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Jilou Wei
- Department of Critical Care Medicine, The First Affiliated Huai'an People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Ting Ji
- Department of Critical Care Medicine, The First Affiliated Huai'an People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
| | - Kui Zang
- Department of Critical Care Medicine, The First Affiliated Huai'an People's Hospital of Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China
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Zou Z, Zheng Q, Cai J, Tang J, Xia L, Li P, Jian J. Identification of BAG5 from orange-spotted grouper (Epinephelus coioides) involved in viral infection. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2021; 116:103916. [PMID: 33137395 DOI: 10.1016/j.dci.2020.103916] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/28/2020] [Accepted: 10/28/2020] [Indexed: 06/11/2023]
Abstract
Bcl-2-associated athanogene 5 (BAG5) is a kind of molecular chaperone that can bind to the Bcl-2 and modulate cell survival. However, little is known about the functions of fish BAG5. In this study, we characterized a BAG5 homolog from orange-spotted grouper (Epinephelus coioides) gene (Ec-BAG5) and investigated its roles during viral infection. The Ec-BAG5 protein encoded 468 amino acids with four BAG domains, which shared high identities with reported BAG5. The highest transcriptional level of Ec-BAG5 was found in the peripheral blood lymphocyte (PBL). And the Ec-BAG5 expression were significantly up-regulated after red-spotted grouper nervous necrosis virus (RGNNV) or Lipopolysaccharide (LPS) stimulation in vitro. Furthermore, Ec-BAG5 overexpression could inhibited viral replication and the expression of viral genes (coat protein (CP) and RNA-dependent RNA polymerase (RdRp)). Also, overexpression of Ec-BAG5 significantly increased the expression of interferon pathway-related factors including interferon regulatory factor 3 (IRF3), interferon-stimulated gene 15 (ISG15), interferon-induced protein 35 (IFP35), myxovirus resistance gene 1 (Mx1) and inflammatory-related factors including tumor necrosis factor receptor-associated factor 6 (TRAF6), tumor necrosis factor-α (TNF-α), interleukin-1 beta (IL-1β), as well as the activities of NF-κB, ISRE and IFN-1. These data indicate that Ec-BAG5 can affect viral infection through regulating the expression of IFN- and inflammation-related factors, which provide useful information to better understand the immune response against viral infection.
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Affiliation(s)
- Zihong Zou
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, PR China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524088, PR China; Guangdong Key Laboratory of Control for Diseases of Aquatic Economic Animals, Zhanjiang, 524088, PR China; Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, 524002, PR China
| | - Qi Zheng
- College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, PR China
| | - Jia Cai
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, PR China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524088, PR China; Guangdong Key Laboratory of Control for Diseases of Aquatic Economic Animals, Zhanjiang, 524088, PR China; Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, 524002, PR China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Guangxi Key Lab for Marine Natural Products and Combinational Biosynthesis Chemistry, Guangxi Beibu Gulf Marine Research Centre, Guangxi Academy of Sciences, Nanning, 530007, PR China.
| | - Jufen Tang
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, PR China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524088, PR China; Guangdong Key Laboratory of Control for Diseases of Aquatic Economic Animals, Zhanjiang, 524088, PR China; Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, 524002, PR China
| | - Liqun Xia
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, PR China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524088, PR China; Guangdong Key Laboratory of Control for Diseases of Aquatic Economic Animals, Zhanjiang, 524088, PR China; Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, 524002, PR China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Pengfei Li
- Guangxi Key Lab for Marine Natural Products and Combinational Biosynthesis Chemistry, Guangxi Beibu Gulf Marine Research Centre, Guangxi Academy of Sciences, Nanning, 530007, PR China
| | - Jichang Jian
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, PR China; Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Zhanjiang, 524088, PR China; Guangdong Key Laboratory of Control for Diseases of Aquatic Economic Animals, Zhanjiang, 524088, PR China; Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, 524002, PR China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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Stress-induced p53 drives BAG5 cochaperone expression to control α-synuclein aggregation in Parkinson's disease. Aging (Albany NY) 2020; 12:20702-20727. [PMID: 33085644 PMCID: PMC7655153 DOI: 10.18632/aging.103998] [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: 06/03/2020] [Accepted: 08/01/2020] [Indexed: 12/13/2022]
Abstract
Parkinson’s disease (PD) is a common neurodegenerative disorder with the pathological hallmark of α-synuclein aggregation. Dysregulation of α-synuclein homeostasis caused by aging, genetic, and environmental factors underlies the pathogenesis of PD. While chaperones are essential for proteostasis, whether modulation of cochaperones may participate in PD formation has not been fully characterized. Here, we assessed the expression of several HSP70- and HSP90-related factors under various stresses and found that BAG5 expression is distinctively elevated in etoposide- or H2O2-treated SH-SY5Y cells. Stress-induced p53 binds to the BAG5 promoter directly to stimulate BAG5. Induced BAG5 binds α-synuclein and HSP70 in both cell cultures and brain lysates from PD patients. Overexpressed BAG5 may result in the loss of its ability to promote HSP70. Importantly, α-synuclein aggregation in SH-SY5Y cells requires BAG5. BAG5 expression is also detected in transgenic SNCA mutant mice and in PD patients. Together, our data reveal stress-induced p53-BAG5-HSP70 regulation that provides a potential therapeutic angle for PD.
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Xi J, Li QQ, Li BQ, Li N. miR‑155 inhibition represents a potential valuable regulator in mitigating myocardial hypoxia/reoxygenation injury through targeting BAG5 and MAPK/JNK signaling. Mol Med Rep 2020; 21:1011-1020. [PMID: 31922242 PMCID: PMC7003039 DOI: 10.3892/mmr.2020.10924] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Accepted: 09/27/2019] [Indexed: 12/30/2022] Open
Abstract
Increasing evidence has indicated that miR-155 is closely associated with apoptosis, which may protect the myocardium and diminish the infarct area in myocardial ischemia reperfusion injury (IRI). In addition, studies have revealed that miR-155 serves a leading role in promoting fibroblast inflammation, cardiac dysfunction and other aspects of myocardial injury. The present study aimed to uncover the function and potential biological mechanism of miR-155 in myocardial IRI. The rat H9c2 myocardial cells was treated with hypoxia/reoxygenation (H/R) to simulate IRI in vitro. Reverse transcription-quantitative polymerase chain reaction (RT-qPCR) was used to detect the expression levels of miR-155 mRNA. Cell Counting Kit-8 and flow cytometry assays and western blot analysis were applied to determine the biological behaviors of the H/R-treated cells. The association between miR-155 and BAG family molecular chaperone regulator 5 (BAG5) was predicted by bioinformatics software and was confirmed by dual luciferase assay. RT-qPCR and western blot analysis were used to analyze the expression of BAG5. The key proteins involved in mitogen-activated protein kinase (MAPK)/JNK signaling pathway were detected by western blot analysis. The data from the RT-qPCR assay indicated that the expression of miR-155 was markedly upregulated in the H/R model, and that downregulation of miR-155 may promote cell proliferation and inhibit cell apoptosis, and vice versa. BAG5, which was downregulated in the H/R model, was confirmed as a target of miR-155 and negatively modulated by miR-155. The key proteins involved in MAPK/JNK signaling, which were highly expressed in the H/R model, were suppressed by treatment with the miR-155 inhibitor, and overexpression of BAG5 promoted the protective effect of miR-155 inhibition on cell injury caused by H/R. In addition, the expression patterns of hypoxia-inducible factor 1-α and von Hippel-Lindau were altered following different treatments. Taken together, the data from the present study indicated that miR-155 inhibition represented a potential treatment strategy to improve myocardial H/R injury, which may be associated with targeting BAG5 and inhibition of the MAPK/JNK pathway.
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Affiliation(s)
- Jing Xi
- Department of Cardiology, Anqiu People's Hospital, Weifang, Shandong 262100, P.R. China
| | - Qiang-Qiang Li
- Department of Cardiology in Integrated Traditional Chinese and Western Medicine, Anqiu People's Hospital, Weifang, Shandong 262100, P.R. China
| | - Bing-Qiang Li
- Department of Cardiology, Anqiu People's Hospital, Weifang, Shandong 262100, P.R. China
| | - Ning Li
- Department of Cardiology, Anqiu People's Hospital, Weifang, Shandong 262100, P.R. China
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11
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De Snoo ML, Friesen EL, Zhang YT, Earnshaw R, Dorval G, Kapadia M, O'Hara DM, Agapova V, Chau H, Pellerito O, Tang MY, Wang X, Schmitt-Ulms G, Durcan TM, Fon EA, Kalia LV, Kalia SK. Bcl-2-associated athanogene 5 (BAG5) regulates Parkin-dependent mitophagy and cell death. Cell Death Dis 2019; 10:907. [PMID: 31787745 PMCID: PMC6885512 DOI: 10.1038/s41419-019-2132-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 10/20/2019] [Accepted: 11/11/2019] [Indexed: 01/06/2023]
Abstract
As pathogenic Parkin mutations result in the defective clearance of damaged mitochondria, Parkin-dependent mitophagy is thought to be protective against the dopaminergic neurodegeneration observed in Parkinson’s disease. Recent studies, however, have demonstrated that Parkin can promote cell death in the context of severe mitochondrial damage by degrading the pro-survival Bcl-2 family member, Mcl-1. Therefore, Parkin may act as a ‘switch’ that can shift the balance between protective or pro-death pathways depending on the degree of mitochondrial damage. Here, we report that the Parkin interacting protein, Bcl-2-associated athanogene 5 (BAG5), impairs mitophagy by suppressing Parkin recruitment to damaged mitochondria and reducing the movement of damaged mitochondria into the lysosomes. BAG5 also enhanced Parkin-mediated Mcl-1 degradation and cell death following severe mitochondrial insult. These results suggest that BAG5 may regulate the bi-modal activity of Parkin, promoting cell death by suppressing Parkin-dependent mitophagy and enhancing Parkin-mediated Mcl-1 degradation.
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Affiliation(s)
- Mitchell L De Snoo
- Krembil Research Institute, Toronto Western Hospital, University Health Network, 60 Leonard Avenue, Toronto, ON, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, Toronto, ON, Canada
| | - Erik L Friesen
- Krembil Research Institute, Toronto Western Hospital, University Health Network, 60 Leonard Avenue, Toronto, ON, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, Toronto, ON, Canada
| | - Yu Tong Zhang
- Krembil Research Institute, Toronto Western Hospital, University Health Network, 60 Leonard Avenue, Toronto, ON, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, Toronto, ON, Canada
| | - Rebecca Earnshaw
- Krembil Research Institute, Toronto Western Hospital, University Health Network, 60 Leonard Avenue, Toronto, ON, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, Toronto, ON, Canada
| | - Geneviève Dorval
- McGill Parkinson Program, Department of Neurology & Neurosurgery, Montreal Neurological Institute, McGill University, Montréal, QC, Canada
| | - Minesh Kapadia
- Krembil Research Institute, Toronto Western Hospital, University Health Network, 60 Leonard Avenue, Toronto, ON, Canada
| | - Darren M O'Hara
- Krembil Research Institute, Toronto Western Hospital, University Health Network, 60 Leonard Avenue, Toronto, ON, Canada
| | - Victoria Agapova
- Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, Toronto, ON, Canada
| | - Hien Chau
- Krembil Research Institute, Toronto Western Hospital, University Health Network, 60 Leonard Avenue, Toronto, ON, Canada
| | - Ornella Pellerito
- Krembil Research Institute, Toronto Western Hospital, University Health Network, 60 Leonard Avenue, Toronto, ON, Canada
| | - Matthew Y Tang
- McGill Parkinson Program, Department of Neurology & Neurosurgery, Montreal Neurological Institute, McGill University, Montréal, QC, Canada
| | - Xinzhu Wang
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON, Canada
| | - Gerold Schmitt-Ulms
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON, Canada
| | - Thomas M Durcan
- McGill Parkinson Program, Department of Neurology & Neurosurgery, Montreal Neurological Institute, McGill University, Montréal, QC, Canada
| | - Edward A Fon
- McGill Parkinson Program, Department of Neurology & Neurosurgery, Montreal Neurological Institute, McGill University, Montréal, QC, Canada
| | - Lorraine V Kalia
- Krembil Research Institute, Toronto Western Hospital, University Health Network, 60 Leonard Avenue, Toronto, ON, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, Toronto, ON, Canada.,Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON, Canada.,Morton and Gloria Shulman Movement Disorders Clinic and the Edmond J. Safra Program in Parkinson's Disease, Division of Neurology, Department of Medicine, Toronto Western Hospital, University Health Network, 399 Bathurst Street, Toronto, ON, Canada
| | - Suneil K Kalia
- Krembil Research Institute, Toronto Western Hospital, University Health Network, 60 Leonard Avenue, Toronto, ON, Canada. .,Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, Toronto, ON, Canada. .,Division of Neurosurgery, Department of Surgery, University of Toronto, 149 College Street, Toronto, ON, Canada.
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12
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Yue X, Zhao Y, Huang G, Li J, Zhu J, Feng Z, Hu W. A novel mutant p53 binding partner BAG5 stabilizes mutant p53 and promotes mutant p53 GOFs in tumorigenesis. Cell Discov 2016; 2:16039. [PMID: 27807478 PMCID: PMC5088412 DOI: 10.1038/celldisc.2016.39] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 10/13/2016] [Indexed: 02/07/2023] Open
Abstract
Tumor suppressor p53 is the most frequently mutated gene in human tumors. Many tumor-associated mutant p53 (mutp53) proteins gain new tumor-promoting activities, including increased proliferation, metastasis and chemoresistance of tumor cells, which are defined as gain-of-functions (GOFs). Mutp53 proteins often accumulate at high levels in human tumors, which is important for mutp53 to exert their GOFs. The mechanism underlying mutp53 proteins accumulation in tumors is not fully understood. Here, we report that BAG5, a member of Bcl-2-associated athanogene (BAG) family proteins, promotes mutp53 accumulation in tumors, which in turn enhances mutp53 GOFs. Mechanistically, BAG5 interacts with mutp53 proteins to protect mutp53 from ubiquitination and degradation by E3 ubiquitin ligases MDM2 and CHIP, which in turn promotes mutp53 protein accumulation and therefore GOFs in promoting cell proliferation, tumor growth, cell migration and chemoresistance. BAG5 is frequently overexpressed in many human tumors and the overexpression of BAG5 is associated with poor prognosis of cancer patients. Altogether, this study revealed that inhibition of mutp53 degradation by BAG5 is a novel and critical mechanism underlying mutp53 protein accumulation and GOFs in cancer. Furthermore, our results also uncovered that promoting mutp53 accumulation and GOFs is a novel mechanism of BAG5 in tumorigenesis.
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Affiliation(s)
- Xuetian Yue
- Department of Radiation Oncology, Rutgers Cancer Institute of New Jersey, Rutgers the State University of New Jersey , New Brunswick, NJ, USA
| | - Yuhan Zhao
- Department of Radiation Oncology, Rutgers Cancer Institute of New Jersey, Rutgers the State University of New Jersey , New Brunswick, NJ, USA
| | - Grace Huang
- Department of Environmental Medicine, Nelson Institute of Environmental Medicine, New York University School of Medicine , Tuxedo, NY, USA
| | - Jun Li
- Department of Radiation Oncology, Rutgers Cancer Institute of New Jersey, Rutgers the State University of New Jersey , New Brunswick, NJ, USA
| | - Junlan Zhu
- Department of Environmental Medicine, Nelson Institute of Environmental Medicine, New York University School of Medicine , Tuxedo, NY, USA
| | - Zhaohui Feng
- Department of Radiation Oncology, Rutgers Cancer Institute of New Jersey, Rutgers the State University of New Jersey , New Brunswick, NJ, USA
| | - Wenwei Hu
- Department of Radiation Oncology, Rutgers Cancer Institute of New Jersey, Rutgers the State University of New Jersey, New Brunswick, NJ, USA; Department of Pharmacology, Rutgers the State University of New Jersey, New Brunswick, NJ, USA
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