1
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Yan X, Li Z, Tian Q, Zhang Y. COPS8 promotes hepatocellular carcinoma progression through the PI3K/AKT/mTOR pathway. Asian J Surg 2024; 47:2947-2949. [PMID: 38431475 DOI: 10.1016/j.asjsur.2024.02.109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 02/16/2024] [Indexed: 03/05/2024] Open
Affiliation(s)
- Xiaodong Yan
- The First Central Clinical School, Tianjin Medical University, Tianjin, China
| | - Zhongmin Li
- The First Central Clinical School, Tianjin Medical University, Tianjin, China
| | - Qing Tian
- Department of Hepatobiliary Surgery, Tianjin First Central Hospital, Tianjin, China
| | - Yamin Zhang
- Department of Hepatobiliary Surgery, Tianjin First Central Hospital, Tianjin, China.
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2
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Shen ZF, Li L, Wang JY, Liao J, Zhang YR, Zhu XM, Wang ZH, Lu JP, Liu XH, Lin FC. Csn5 inhibits autophagy by regulating the ubiquitination of Atg6 and Tor to mediate the pathogenicity of Magnaporthe oryzae. Cell Commun Signal 2024; 22:222. [PMID: 38594767 PMCID: PMC11003145 DOI: 10.1186/s12964-024-01598-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 03/26/2024] [Indexed: 04/11/2024] Open
Abstract
Csn5 is subunit 5 of the COP9 signalosome (CSN), but the mechanism by which it strictly controls the pathogenicity of pathogenic fungi through autophagy remains unclear. Here, we found that Csn5 deficiency attenuated pathogenicity and enhanced autophagy in Magnaporthe oryzae. MoCSN5 knockout led to overubiquitination and overdegradation of MoTor (the core protein of the TORC1 complex [target of rapamycin]) thereby promoted autophagy. In addition, we identified MoCsn5 as a new interactor of MoAtg6. Atg6 was found to be ubiquitinated through linkage with lysine 48 (K48) in cells, which is necessary for infection-associated autophagy in pathogenic fungi. K48-ubiquitination of Atg6 enhanced its degradation and thereby inhibited autophagic activity. Our experimental results indicated that MoCsn5 promoted K48-ubiquitination of MoAtg6, which reduced the MoAtg6 protein content and thus inhibited autophagy. Aberrant ubiquitination and autophagy in ΔMocsn5 led to pleiotropic defects in the growth, development, stress resistance, and pathogenicity of M. oryzae. In summary, our study revealed a novel mechanism by which Csn5 regulates autophagy and pathogenicity in rice blast fungus through ubiquitination.
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Affiliation(s)
- Zi-Fang Shen
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Agricultural Microbiomics, Key Laboratory of Agricultural Microbiome (MARA), Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Agricultural Microbiomics, Key Laboratory of Agricultural Microbiome (MARA), Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Lin Li
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Agricultural Microbiomics, Key Laboratory of Agricultural Microbiome (MARA), Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Jing-Yi Wang
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Agricultural Microbiomics, Key Laboratory of Agricultural Microbiome (MARA), Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Jian Liao
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Agricultural Microbiomics, Key Laboratory of Agricultural Microbiome (MARA), Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Yun-Ran Zhang
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Agricultural Microbiomics, Key Laboratory of Agricultural Microbiome (MARA), Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Xue-Ming Zhu
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Agricultural Microbiomics, Key Laboratory of Agricultural Microbiome (MARA), Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Zi-He Wang
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Agricultural Microbiomics, Key Laboratory of Agricultural Microbiome (MARA), Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Jian-Ping Lu
- College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Xiao-Hong Liu
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Agricultural Microbiomics, Key Laboratory of Agricultural Microbiome (MARA), Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Fu-Cheng Lin
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Agricultural Microbiomics, Key Laboratory of Agricultural Microbiome (MARA), Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.
- State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Agricultural Microbiomics, Key Laboratory of Agricultural Microbiome (MARA), Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China.
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3
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Cai M, Wu P, Ni W, Huang D, Wang X. mTORC1 hyperactivation and resultant suppression of macroautophagy contribute to the induction of cardiomyocyte necroptosis by catecholamine surges. Physiol Rep 2024; 12:e15966. [PMID: 38444056 PMCID: PMC10915131 DOI: 10.14814/phy2.15966] [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: 12/21/2023] [Revised: 02/17/2024] [Accepted: 02/26/2024] [Indexed: 03/07/2024] Open
Abstract
Previous studies revealed a controversial role of mechanistic target of rapamycin complex 1 (mTORC1) and mTORC1-regulated macroautophagy in isoproterenol (ISO)-induced cardiac injury. Here we investigated the role of mTORC1 and potential underlying mechanisms in ISO-induced cardiomyocyte necrosis. Two consecutive daily injections of ISO (85 mg/kg, s.c.) or vehicle control (CTL) were administered to C57BL/6J mice with or without rapamycin (RAP, 5 mg/kg, i.p.) pretreatment. Western blot analyses showed that myocardial mTORC1 signaling and the RIPK1-RIPK3-MLKL necroptotic pathway were activated, mRNA expression analyses revealed downregulation of representative TFEB target genes, and Evan's blue dye uptake assays detected increased cardiomyocyte necrosis in ISO-treated mice. However, RAP pretreatment prevented or significantly attenuated the ISO-induced cardiomyocyte necrosis, myocardial inflammation, downregulation of TFEB target genes, and activation of the RIPK1-RIPK3-MLKL pathway. LC3-II flux assays confirmed the impairment of myocardial autophagic flux in the ISO-treated mice. In cultured neonatal rat cardiomyocytes, mTORC1 signaling was also activated by ISO, and inhibition of mTORC1 by RAP attenuated ISO-induced cytotoxicity. These findings suggest that mTORC1 hyperactivation and resultant suppression of macroautophagy play a major role in the induction of cardiomyocyte necroptosis by catecholamine surges, identifying mTORC1 inhibition as a potential strategy to treat heart diseases with catecholamine surges.
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Affiliation(s)
- Mingqi Cai
- Heart CenterShanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghaiChina
- Division of Basic Biomedical SciencesSanford School of Medicine of the University of South DakotaVermillionSouth DakotaUSA
| | - Penglong Wu
- Division of Basic Biomedical SciencesSanford School of Medicine of the University of South DakotaVermillionSouth DakotaUSA
- Department of Cardiology, Xiamen Cardiovascular Hospital of Xiamen University, School of MedicineXiamen UniversityXiamenChina
| | - Wei Ni
- Department of Cardiology, Xiamen Cardiovascular Hospital of Xiamen University, School of MedicineXiamen UniversityXiamenChina
| | - Dong Huang
- Heart CenterShanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghaiChina
| | - Xuejun Wang
- Division of Basic Biomedical SciencesSanford School of Medicine of the University of South DakotaVermillionSouth DakotaUSA
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4
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Zambrano-Carrasco J, Zou J, Wang W, Sun X, Li J, Su H. Emerging Roles of Cullin-RING Ubiquitin Ligases in Cardiac Development. Cells 2024; 13:235. [PMID: 38334627 PMCID: PMC10854628 DOI: 10.3390/cells13030235] [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: 12/23/2023] [Revised: 01/18/2024] [Accepted: 01/22/2024] [Indexed: 02/10/2024] Open
Abstract
Heart development is a spatiotemporally regulated process that extends from the embryonic phase to postnatal stages. Disruption of this highly orchestrated process can lead to congenital heart disease or predispose the heart to cardiomyopathy or heart failure. Consequently, gaining an in-depth understanding of the molecular mechanisms governing cardiac development holds considerable promise for the development of innovative therapies for various cardiac ailments. While significant progress in uncovering novel transcriptional and epigenetic regulators of heart development has been made, the exploration of post-translational mechanisms that influence this process has lagged. Culling-RING E3 ubiquitin ligases (CRLs), the largest family of ubiquitin ligases, control the ubiquitination and degradation of ~20% of intracellular proteins. Emerging evidence has uncovered the critical roles of CRLs in the regulation of a wide range of cellular, physiological, and pathological processes. In this review, we summarize current findings on the versatile regulation of cardiac morphogenesis and maturation by CRLs and present future perspectives to advance our comprehensive understanding of how CRLs govern cardiac developmental processes.
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Affiliation(s)
- Josue Zambrano-Carrasco
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (J.Z.-C.); (J.Z.)
| | - Jianqiu Zou
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (J.Z.-C.); (J.Z.)
| | - Wenjuan Wang
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (J.Z.-C.); (J.Z.)
| | - Xinghui Sun
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE 68588, USA;
| | - Jie Li
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (J.Z.-C.); (J.Z.)
| | - Huabo Su
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (J.Z.-C.); (J.Z.)
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
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5
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Liang W, Sagar S, Ravindran R, Najor RH, Quiles JM, Chi L, Diao RY, Woodall BP, Leon LJ, Zumaya E, Duran J, Cauvi DM, De Maio A, Adler ED, Gustafsson ÅB. Mitochondria are secreted in extracellular vesicles when lysosomal function is impaired. Nat Commun 2023; 14:5031. [PMID: 37596294 PMCID: PMC10439183 DOI: 10.1038/s41467-023-40680-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 08/04/2023] [Indexed: 08/20/2023] Open
Abstract
Mitochondrial quality control is critical for cardiac homeostasis as these organelles are responsible for generating most of the energy needed to sustain contraction. Dysfunctional mitochondria are normally degraded via intracellular degradation pathways that converge on the lysosome. Here, we identified an alternative mechanism to eliminate mitochondria when lysosomal function is compromised. We show that lysosomal inhibition leads to increased secretion of mitochondria in large extracellular vesicles (EVs). The EVs are produced in multivesicular bodies, and their release is independent of autophagy. Deletion of the small GTPase Rab7 in cells or adult mouse heart leads to increased secretion of EVs containing ubiquitinated cargos, including intact mitochondria. The secreted EVs are captured by macrophages without activating inflammation. Hearts from aged mice or Danon disease patients have increased levels of secreted EVs containing mitochondria indicating activation of vesicular release during cardiac pathophysiology. Overall, these findings establish that mitochondria are eliminated in large EVs through the endosomal pathway when lysosomal degradation is inhibited.
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Affiliation(s)
- Wenjing Liang
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Shakti Sagar
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Rishith Ravindran
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Rita H Najor
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Justin M Quiles
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Liguo Chi
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Rachel Y Diao
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Benjamin P Woodall
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Leonardo J Leon
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Erika Zumaya
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Jason Duran
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - David M Cauvi
- Department of Surgery, University of California San Diego, La Jolla, CA, USA
| | - Antonio De Maio
- Department of Surgery, University of California San Diego, La Jolla, CA, USA
| | - Eric D Adler
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Åsa B Gustafsson
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA.
- Department of Pharmacology, University of California San Diego, La Jolla, CA, USA.
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6
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Zhang L, Cui T, Wang X. The Interplay Between Autophagy and Regulated Necrosis. Antioxid Redox Signal 2023; 38:550-580. [PMID: 36053716 PMCID: PMC10025850 DOI: 10.1089/ars.2022.0110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 08/23/2022] [Indexed: 11/13/2022]
Abstract
Significance: Autophagy is critical to cellular homeostasis. Emergence of the concept of regulated necrosis, such as necroptosis, ferroptosis, pyroptosis, and mitochondrial membrane-permeability transition (MPT)-derived necrosis, has revolutionized the research into necrosis. Both altered autophagy and regulated necrosis contribute to major human diseases. Recent studies reveal an intricate interplay between autophagy and regulated necrosis. Understanding the interplay at the molecular level will provide new insights into the pathophysiology of related diseases. Recent Advances: Among the three forms of autophagy, macroautophagy is better studied for its crosstalk with regulated necrosis. Macroautophagy seemingly can either antagonize or promote regulated necrosis, depending upon the form of regulated necrosis, the type of cells or stimuli, and other cellular contexts. This review will critically analyze recent advances in the molecular mechanisms governing the intricate dialogues between macroautophagy and main forms of regulated necrosis. Critical Issues: The dual roles of autophagy, either pro-survival or pro-death characteristics, intricate the mechanistic relationship between autophagy and regulated necrosis at molecular level in various pathological conditions. Meanwhile, key components of regulated necrosis are also involved in the regulation of autophagy, which further complicates the interrelationship. Future Directions: Resolving the controversies over causation between altered autophagy and a specific form of regulated necrosis requires approaches that are more definitive, where rigorous evaluation of autophagic flux and the development of more reliable and specific methods to quantify each form of necrosis will be essential. The relationship between chaperone-mediated autophagy or microautophagy and regulated necrosis remains largely unstudied. Antioxid. Redox Signal. 38, 550-580.
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Affiliation(s)
- Lei Zhang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
| | - Taixing Cui
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina, USA
| | - Xuejun Wang
- Division of Basic Biomedical Sciences, The University of South Dakota Sanford School of Medicine, Vermillion, South Dakota, USA
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7
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Song JM, Kang M, Lee S, Kim J, Park S, Park DH, Lee S, Suh YH. Deneddylating enzyme SENP8 regulates neuronal development. J Neurochem 2023; 165:348-361. [PMID: 36847487 DOI: 10.1111/jnc.15797] [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: 10/15/2022] [Revised: 01/16/2023] [Accepted: 02/13/2023] [Indexed: 03/01/2023]
Abstract
Neddylation is a cellular process in which the neural precursor cell expressed, developmentally down-regulated 8 (NEDD8) is conjugated to the lysine residue of target proteins via serial enzymatic cascades. Recently, it has been demonstrated that neddylation is required for synaptic clustering of metabotropic glutamate receptor 7 (mGlu7) and postsynaptic density protein 95 (PSD-95), and the inhibition of neddylation impairs neurite outgrowth and excitatory synaptic maturation. Similar to the balanced role of deubiquitylating enzymes (DUBs) in the ubiquitination process, we hypothesized that deneddylating enzymes can regulate neuronal development by counteracting the process of neddylation. We find that the SUMO peptidase family member, NEDD8 specific (SENP8) acts as a key neuronal deneddylase targeting the global neuronal substrates in primary rat cultured neurons. We demonstrate that SENP8 expression levels are developmentally regulated, peaking around the first postnatal week and gradually diminishing in mature brain and neurons. We find that SENP8 negatively regulates neurite outgrowth through multiple pathways, including actin dynamics, Wnt/β-catenin signaling, and autophagic processes. Alterations in neurite outgrowth by SENP8 subsequently result in the impairment of excitatory synapse maturation. Our data indicate that SENP8 plays an essential role in neuronal development and is a promising therapeutic target for neurodevelopmental disorders.
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Affiliation(s)
- Jae-Man Song
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, South Korea.,Neuroscience Research Institute, Seoul National University College of Medicine, Seoul, South Korea.,Transplantation Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Minji Kang
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, South Korea.,Neuroscience Research Institute, Seoul National University College of Medicine, Seoul, South Korea.,Transplantation Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Seungha Lee
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, South Korea.,Neuroscience Research Institute, Seoul National University College of Medicine, Seoul, South Korea.,Transplantation Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Jungho Kim
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, South Korea.,Neuroscience Research Institute, Seoul National University College of Medicine, Seoul, South Korea.,Transplantation Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Sunha Park
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, South Korea.,Neuroscience Research Institute, Seoul National University College of Medicine, Seoul, South Korea.,Transplantation Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Da-Ha Park
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, South Korea.,Neuroscience Research Institute, Seoul National University College of Medicine, Seoul, South Korea.,Transplantation Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Sanghyeon Lee
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, South Korea.,Neuroscience Research Institute, Seoul National University College of Medicine, Seoul, South Korea.,Transplantation Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Young Ho Suh
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, South Korea.,Neuroscience Research Institute, Seoul National University College of Medicine, Seoul, South Korea.,Transplantation Research Institute, Seoul National University College of Medicine, Seoul, South Korea
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8
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Zou J, Wang W, Lu Y, Ayala J, Dong K, Zhou H, Wang J, Chen W, Weintraub NL, Zhou J, Li J, Su H. Neddylation is required for perinatal cardiac development through stimulation of metabolic maturation. Cell Rep 2023; 42:112018. [PMID: 36662623 PMCID: PMC10029150 DOI: 10.1016/j.celrep.2023.112018] [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: 04/27/2022] [Revised: 11/23/2022] [Accepted: 01/05/2023] [Indexed: 01/21/2023] Open
Abstract
Cardiac maturation is crucial for postnatal cardiac development and is increasingly known to be regulated by a series of transcription factors. However, post-translational mechanisms regulating this process remain unclear. Here we report the indispensable role of neddylation in cardiac maturation. Mosaic deletion of NAE1, an essential enzyme for neddylation, in neonatal hearts results in the rapid development of cardiomyopathy and heart failure. NAE1 deficiency disrupts transverse tubule formation, inhibits physiological hypertrophy, and represses fetal-to-adult isoform switching, thus culminating in cardiomyocyte immaturation. Mechanistically, we find that neddylation is needed for the perinatal metabolic transition from glycolytic to oxidative metabolism in cardiomyocytes. Further, we show that HIF1α is a putative neddylation target and that inhibition of neddylation accumulates HIF1α and impairs fatty acid utilization and bioenergetics in cardiomyocytes. Together, our data show neddylation is required for cardiomyocyte maturation through promoting oxidative metabolism in the developing heart.
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Affiliation(s)
- Jianqiu Zou
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Wenjuan Wang
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; Key Laboratory of Protein Modification and Degradation, State Key Laboratory of Respiratory Disease, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Yi Lu
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; Department of Neurology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Juan Ayala
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Kunzhe Dong
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Hongyi Zhou
- Department of Physiology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Jinxi Wang
- Department of Medicine, University of Iowa, 200 Hawkins Drive, CBRB 2270B, Iowa City, IA 52242, USA
| | - Weiqin Chen
- Department of Physiology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Neal L Weintraub
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Jiliang Zhou
- Department of Medicine, University of Iowa, 200 Hawkins Drive, CBRB 2270B, Iowa City, IA 52242, USA
| | - Jie Li
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; Division of Cardiology, Department of Medicine, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Huabo Su
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA.
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9
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Niu J, Yan T, Guo W, Wang W, Ren T, Huang Y, Zhao Z, Yu Y, Chen C, Huang Q, Lou J, Guo L. The COPS3-FOXO3 positive feedback loop regulates autophagy to promote cisplatin resistance in osteosarcoma. Autophagy 2022:1-18. [DOI: 10.1080/15548627.2022.2150003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Affiliation(s)
- Jianfang Niu
- Musculoskeletal Tumor Center, Peking University People’s Hospital, Beijing, China
- Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, China
| | - Taiqiang Yan
- Musculoskeletal Tumor Center, Peking University People’s Hospital, Beijing, China
- Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, China
| | - Wei Guo
- Musculoskeletal Tumor Center, Peking University People’s Hospital, Beijing, China
- Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, China
| | - Wei Wang
- Musculoskeletal Tumor Center, Peking University People’s Hospital, Beijing, China
- Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, China
| | - Tingting Ren
- Musculoskeletal Tumor Center, Peking University People’s Hospital, Beijing, China
- Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, China
| | - Yi Huang
- Musculoskeletal Tumor Center, Peking University People’s Hospital, Beijing, China
- Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, China
| | - Zhiqing Zhao
- Musculoskeletal Tumor Center, Peking University People’s Hospital, Beijing, China
- Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, China
| | - Yiyang Yu
- Musculoskeletal Tumor Center, Peking University People’s Hospital, Beijing, China
- Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, China
| | - Chenglong Chen
- Musculoskeletal Tumor Center, Peking University People’s Hospital, Beijing, China
- Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, China
| | - Qingshan Huang
- Musculoskeletal Tumor Center, Peking University People’s Hospital, Beijing, China
- Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, China
| | - Jingbing Lou
- Musculoskeletal Tumor Center, Peking University People’s Hospital, Beijing, China
- Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, China
| | - Lei Guo
- Musculoskeletal Tumor Center, Peking University People’s Hospital, Beijing, China
- Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, China
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10
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Du W, Zhang R, Muhammad B, Pei D. Targeting the COP9 signalosome for cancer therapy. Cancer Biol Med 2022; 19:j.issn.2095-3941.2021.0605. [PMID: 35315259 PMCID: PMC9196064 DOI: 10.20892/j.issn.2095-3941.2021.0605] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 01/18/2022] [Indexed: 11/24/2022] Open
Abstract
The COP9 signalosome (CSN) is a highly conserved protein complex composed of 8 subunits (CSN1 to CSN8). The individual subunits of the CSN play essential roles in cell proliferation, tumorigenesis, cell cycle regulation, DNA damage repair, angiogenesis, and microenvironmental homeostasis. The CSN complex has an intrinsic metalloprotease that removes the ubiquitin-like activator NEDD8 from cullin-RING ligases (CRLs). Binding of neddylated CRLs to CSN is sensed by CSN4 and communicated to CSN5 with the assistance of CSN6, thus leading to the activation of deneddylase. Therefore, CSN is a crucial regulator at the intersection between neddylation and ubiquitination in cancer progression. Here, we summarize current understanding of the roles of individual CSN subunits in cancer progression. Furthermore, we explain how the CSN affects tumorigenesis through regulating transcription factors and the cell cycle. Finally, we discuss individual CSN subunits as potential therapeutic targets to provide new directions and strategies for cancer therapy.
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Affiliation(s)
- Wenqi Du
- Department of Pathology, Xuzhou Medical University, Xuzhou 221004, China
- Department of Human Anatomy, Xuzhou Medical University, Xuzhou 221004, China
| | - Ruicheng Zhang
- Department of Neurology, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221006, China
| | - Bilal Muhammad
- Department of Neurology, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221006, China
| | - Dongsheng Pei
- Department of Pathology, Xuzhou Medical University, Xuzhou 221004, China
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11
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Roles of Cullin-RING Ubiquitin Ligases in Cardiovascular Diseases. Biomolecules 2022; 12:biom12030416. [PMID: 35327608 PMCID: PMC8946067 DOI: 10.3390/biom12030416] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 03/03/2022] [Accepted: 03/04/2022] [Indexed: 12/18/2022] Open
Abstract
Maintenance of protein homeostasis is crucial for virtually every aspect of eukaryotic biology. The ubiquitin-proteasome system (UPS) represents a highly regulated quality control machinery that protects cells from a variety of stress conditions as well as toxic proteins. A large body of evidence has shown that UPS dysfunction contributes to the pathogenesis of cardiovascular diseases. This review highlights the latest findings regarding the physiological and pathological roles of cullin-RING ubiquitin ligases (CRLs), an essential player in the UPS, in the cardiovascular system. To inspire potential therapeutic invention, factors regulating CRL activities are also discussed.
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12
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Wu P, Cai M, Liu J, Wang X. Catecholamine Surges Cause Cardiomyocyte Necroptosis via a RIPK1-RIPK3-Dependent Pathway in Mice. Front Cardiovasc Med 2021; 8:740839. [PMID: 34604361 PMCID: PMC8481609 DOI: 10.3389/fcvm.2021.740839] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 08/16/2021] [Indexed: 12/12/2022] Open
Abstract
Background: Catecholamine surges and resultant excessive β-adrenergic stimulation occur in a broad spectrum of diseases. Excessive β-adrenergic stimulation causes cardiomyocyte necrosis, but the underlying mechanism remains obscure. Necroptosis, a major form of regulated necrosis mediated by RIPK3-centered pathways, is implicated in heart failure; however, it remains unknown whether excessive β-adrenergic stimulation-induced cardiac injury involves necroptosis. Hence, we conducted the present study to address these critical gaps. Methods and Results: Two consecutive daily injections of isoproterenol (ISO; 85 mg/kg, s.c.) or saline were administered to adult mixed-sex mice. At 24 h after the second ISO injection, cardiac area with Evans blue dye (EBD) uptake and myocardial protein levels of CD45, RIPK1, Ser166-phosphorylated RIPK1, RIPK3, and Ser345-phosphorylated MLKL (p-MLKL) were significantly greater, while Ser321-phosphorylated RIPK1 was significantly lower, in the ISO-treated than in saline-treated wild-type (WT) mice. The ISO-induced increase of EBD uptake was markedly less in RIPK3−/− mice compared with WT mice (p = 0.016). Pretreatment with the RIPK1-selective inhibitor necrostatin-1 diminished ISO-induced increases in RIPK3 and p-MLKL in WT mice and significantly attenuated ISO-induced increases of EBD uptake in WT but not RIPK3−/− mice. Conclusions: A large proportion of cardiomyocyte necrosis induced by excessive β-adrenergic stimulation belongs to necroptosis and is mediated by a RIPK1–RIPK3-dependent pathway, identifying RIPK1 and RIPK3 as potential therapeutic targets for catecholamine surges.
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Affiliation(s)
- Penglong Wu
- Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Vermillion, SD, United States.,Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, State Key Laboratory of Respiratory Disease, School of Basic Medical Sciences, Affiliated Cancer Hospital of Guangzhou Medical University, Guangzhou, China
| | - Mingqi Cai
- Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Vermillion, SD, United States
| | - Jinbao Liu
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, State Key Laboratory of Respiratory Disease, School of Basic Medical Sciences, Affiliated Cancer Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xuejun Wang
- Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Vermillion, SD, United States
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13
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Lewno MT, Cui T, Wang X. Cullin Deneddylation Suppresses the Necroptotic Pathway in Cardiomyocytes. Front Physiol 2021; 12:690423. [PMID: 34262479 PMCID: PMC8273387 DOI: 10.3389/fphys.2021.690423] [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: 04/02/2021] [Accepted: 05/24/2021] [Indexed: 12/13/2022] Open
Abstract
Cardiomyocyte death in the form of apoptosis and necrosis represents a major cellular mechanism underlying cardiac pathogenesis. Recent advances in cell death research reveal that not all necrosis is accidental, but rather there are multiple forms of necrosis that are regulated. Necroptosis, the earliest identified regulated necrosis, is perhaps the most studied thus far, and potential links between necroptosis and Cullin-RING ligases (CRLs), the largest family of ubiquitin E3 ligases, have been postulated. Cullin neddylation activates the catalytic dynamic of CRLs; the reverse process, Cullin deneddylation, is performed by the COP9 signalosome holocomplex (CSN) that is formed by eight unique protein subunits, COPS1/CNS1 through COPS8/CNS8. As revealed by cardiomyocyte-restricted knockout of Cops8 (Cops8-cko) in mice, perturbation of Cullin deneddylation in cardiomyocytes impairs not only the functioning of the ubiquitin-proteasome system (UPS) but also the autophagic-lysosomal pathway (ALP). Similar cardiac abnormalities are also observed in Cops6-cko mice; and importantly, loss of the desmosome targeting of COPS6 is recently implicated as a pathogenic factor in arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C). Cops8-cko causes massive cardiomyocyte death in the form of necrosis rather than apoptosis and rapidly leads to a progressive dilated cardiomyopathy phenotype as well as drastically shortened lifespan in mice. Even a moderate downregulation of Cullin deneddylation as seen in mice with Cops8 hypomorphism exacerbates cardiac proteotoxicity induced by overexpression of misfolded proteins. More recently, it was further demonstrated that cardiomyocyte necrosis caused by Cops8-cko belongs to necroptosis and is mediated by the RIPK1-RIPK3 pathway. This article reviews these recent advances and discusses the potential links between Cullin deneddylation and the necroptotic pathways in hopes of identifying potentially new therapeutic targets for the prevention of cardiomyocyte death.
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Affiliation(s)
- Megan T Lewno
- Division of Basic Biomedical Sciences, The University of South Dakota Sanford School of Medicine, Vermillion, SD, United States
| | - Taixing Cui
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, United States
| | - Xuejun Wang
- Division of Basic Biomedical Sciences, The University of South Dakota Sanford School of Medicine, Vermillion, SD, United States
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14
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Moon JH, Hong JM, Park SY. The antidiabetic drug troglitazone protects against PrP (106‑126)‑induced neurotoxicity via the PPARγ‑autophagy pathway in neuronal cells. Mol Med Rep 2021; 23:430. [PMID: 33846779 PMCID: PMC8047904 DOI: 10.3892/mmr.2021.12069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 03/16/2021] [Indexed: 12/11/2022] Open
Abstract
Prion diseases, which involve the alteration of cellular prion protein into a misfolded isoform, disrupt the central nervous systems of humans and animals alike. Prior research has suggested that peroxisome proliferator-activator receptor (PPAR)γ and autophagy provide some protection against neurodegeneration. PPARs are critical to lipid metabolism regulation and autophagy is one of the main cellular mechanisms by which cell function and homeostasis is maintained. The present study examined the effect of troglitazone, a PPARγ agonist, on autophagy flux in a prion peptide (PrP) (106–126)-mediated neurodegeneration model. Western blot analysis confirmed that treatment with troglitazone increased LC3-II and p62 protein expression, whereas an excessive increase in autophagosomes was verified by transmission electron microscopy. Troglitazone weakened PrP (106–126)-mediated neurotoxicity via PPARγ activation and autophagy flux inhibition. A PPARγ antagonist blocked PPARγ activation as well as the neuroprotective effects induced by troglitazone treatment, indicating that PPARγ deactivation impaired troglitazone-mediated protective effects. In conclusion, the present study demonstrated that troglitazone protected primary neuronal cells against PrP (106–126)-induced neuronal cell death by inhibiting autophagic flux and activating PPARγ signals. These results suggested that troglitazone may be a useful therapeutic agent for the treatment of neurodegenerative disorders and prion diseases.
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Affiliation(s)
- Ji-Hong Moon
- Biosafety Research Institute, College of Veterinary Medicine, Jeonbuk National University, Iksan, Jeonbuk 54596, Republic of Korea
| | - Jeong-Min Hong
- Biosafety Research Institute, College of Veterinary Medicine, Jeonbuk National University, Iksan, Jeonbuk 54596, Republic of Korea
| | - Sang-Youel Park
- Biosafety Research Institute, College of Veterinary Medicine, Jeonbuk National University, Iksan, Jeonbuk 54596, Republic of Korea
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15
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Hu J, Ding X, Tian S, Chu Y, Liu Z, Li Y, Li X, Wang G, Wang L, Wang Z. TRIM39 deficiency inhibits tumor progression and autophagic flux in colorectal cancer via suppressing the activity of Rab7. Cell Death Dis 2021; 12:391. [PMID: 33846303 PMCID: PMC8041807 DOI: 10.1038/s41419-021-03670-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 03/20/2021] [Accepted: 03/22/2021] [Indexed: 12/24/2022]
Abstract
The biological function of TRIM39, a member of TRIM family, remains largely unexplored in cancer, especially in colorectal cancer (CRC). In this study, we show that TRIM39 is upregulated in tumor tissues compared to adjacent normal tissues and associated with poor prognosis in CRC. Functional studies demonstrate that TRIM39 deficiency restrains CRC progression in vitro and in vivo. Our results further find that TRIM39 is a positive regulator of autophagosome–lysosome fusion. Mechanistically, TRIM39 interacts with Rab7 and promotes its activity via inhibiting its ubiquitination at lysine 191 residue. Depletion of TRIM39 inhibits CRC progression and autophagic flux in a Rab7 activity-dependent manner. Moreover, TRIM39 deficiency suppresses CRC progression through inhibiting autophagic degradation of p53. Thus, our findings uncover the roles as well as the relevant mechanisms of TRIM39 in CRC and establish a functional relationship between autophagy and CRC progression, which may provide promising approaches for the treatment of CRC.
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Affiliation(s)
- Jia Hu
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China
| | - Xueliang Ding
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China
| | - Shaobo Tian
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China
| | - Yanan Chu
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China
| | - Zhibo Liu
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China
| | - Yuqin Li
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China
| | - Xiaoqiong Li
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China
| | - Guobin Wang
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China.
| | - Lin Wang
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China. .,Department of Clinical Laboratory, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China.
| | - Zheng Wang
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China. .,Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China.
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16
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Kuhn C, Menke M, Senger F, Mack C, Dierck F, Hille S, Schmidt I, Brunke G, Bünger P, Schmiedel N, Will R, Sossalla S, Frank D, Eschenhagen T, Carrier L, Lüllmann-Rauch R, Rangrez AY, Frey N. FYCO1 Regulates Cardiomyocyte Autophagy and Prevents Heart Failure Due to Pressure Overload In Vivo. JACC Basic Transl Sci 2021; 6:365-380. [PMID: 33997522 PMCID: PMC8093479 DOI: 10.1016/j.jacbts.2021.01.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 01/06/2021] [Accepted: 01/06/2021] [Indexed: 12/31/2022]
Abstract
FYCO1, a component of the autophagic machinery, is highly expressed in the heart and a potent inducer of cardiomyocyte autophagy. Loss of FYCO1 in vivo inhibits adaptation to starvation or biomechanical stress of the heart by an abrogated increase of autophagic flux and results in contractile dysfunction. Heart specific overexpression of FYCO1 improves autophagic flux and rescues contractile dysfunction following pressure overload.
Autophagy is a cellular degradation process that has been implicated in diverse disease processes. The authors provide evidence that FYCO1, a component of the autophagic machinery, is essential for adaptation to cardiac stress. Although the absence of FYCO1 does not affect basal autophagy in isolated cardiomyocytes, it abolishes induction of autophagy after glucose deprivation. Likewise, Fyco1-deficient mice subjected to starvation or pressure overload are unable to respond with induction of autophagy and develop impaired cardiac function. FYCO1 overexpression leads to induction of autophagy in isolated cardiomyocytes and transgenic mouse hearts, thereby rescuing cardiac dysfunction in response to biomechanical stress.
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Key Words
- BFA, bafilomycin A1
- CSA, cell surface area
- FYCO1
- GFP, green fluorescent protein
- KO, knockout
- MHC, myosin heavy chain
- NRCM, neonatal rat cardiomyocytes
- RFP, red fluorescent protein
- TAC, transverse aortic constriction
- TG, transgenic
- WT, wild-type
- autophagy
- heart failure
- mRNA, messenger ribonucleic acid
- microRNA, micro–ribonucleic acid
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Affiliation(s)
- Christian Kuhn
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Maja Menke
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Frauke Senger
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Claudia Mack
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Franziska Dierck
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Susanne Hille
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany
| | - Inga Schmidt
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Gabriele Brunke
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Pia Bünger
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Nesrin Schmiedel
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Rainer Will
- Genomics and Proteomics Core Facility, DKFZ (German Cancer Research Center), Heidelberg, Germany
| | - Samuel Sossalla
- Department of Internal Medicine II, University Medical Center Regensburg, Regensburg, Germany
| | - Derk Frank
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany
| | - Thomas Eschenhagen
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg Eppendorf, Hamburg, Germany
| | - Lucie Carrier
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg Eppendorf, Hamburg, Germany
| | | | - Ashraf Yusuf Rangrez
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany
| | - Norbert Frey
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Heidelberg, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Heidelberg, Germany
- Address for correspondence: Prof. Dr. Norbert Frey, Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany.
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17
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Raudenská M, Balvan J, Masařík M. Cell death in head and neck cancer pathogenesis and treatment. Cell Death Dis 2021; 12:192. [PMID: 33602906 PMCID: PMC7893032 DOI: 10.1038/s41419-021-03474-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 01/26/2021] [Accepted: 01/27/2021] [Indexed: 12/13/2022]
Abstract
Many cancer therapies aim to trigger apoptosis in cancer cells. Nevertheless, the presence of oncogenic alterations in these cells and distorted composition of tumour microenvironment largely limit the clinical efficacy of this type of therapy. Luckily, scientific consensus describes about 10 different cell death subroutines with different regulatory pathways and cancer cells are probably not able to avoid all of cell death types at once. Therefore, a focused and individualised therapy is needed to address the specific advantages and disadvantages of individual tumours. Although much is known about apoptosis, therapeutic opportunities of other cell death pathways are often neglected. Molecular heterogeneity of head and neck squamous cell carcinomas (HNSCC) causing unpredictability of the clinical response represents a grave challenge for oncologists and seems to be a critical component of treatment response. The large proportion of this clinical heterogeneity probably lies in alterations of cell death pathways. How exactly cells die is very important because the predominant type of cell death can have multiple impacts on the therapeutic response as cell death itself acts as a second messenger. In this review, we discuss the different types of programmed cell death (PCD), their connection with HNSCC pathogenesis and possible therapeutic windows that result from specific sensitivity to some form of PCD in some clinically relevant subgroups of HNSCC.
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Affiliation(s)
- Martina Raudenská
- Department of Physiology, Faculty of Medicine, Masaryk University / Kamenice 5, CZ-625 00, Brno, Czech Republic.,Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00, Brno, Czech Republic
| | - Jan Balvan
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University / Kamenice 5, CZ-625 00, Brno, Czech Republic
| | - Michal Masařík
- Department of Physiology, Faculty of Medicine, Masaryk University / Kamenice 5, CZ-625 00, Brno, Czech Republic. .,Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00, Brno, Czech Republic. .,Department of Pathological Physiology, Faculty of Medicine, Masaryk University / Kamenice 5, CZ-625 00, Brno, Czech Republic. .,BIOCEV, First Faculty of Medicine, Charles University, Prumyslova 595, CZ-252 50, Vestec, Czech Republic.
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18
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A Destiny for Degradation: Interplay between Cullin-RING E3 Ligases and Autophagy. Trends Cell Biol 2021; 31:432-444. [PMID: 33573849 DOI: 10.1016/j.tcb.2021.01.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 01/09/2021] [Accepted: 01/14/2021] [Indexed: 12/13/2022]
Abstract
Autophagy and the ubiquitin-proteasome system (UPS) are two major pathways for protein degradation. The cullin-RING E3 ligases (CRLs) are the largest E3 ligase family and have key biological functions in maintaining protein homeostasis. We provide an updated review of the interactions between CRLs and autophagy, focusing on the regulatory effects of CRLs on the core autophagy machinery that consists of several autophagy-related protein (ATG) complexes and their key upstream signaling pathways. The involvement of such functional interactions in health and disease is also discussed. Understanding the role of CRLs in autophagy is helpful for the development of therapeutic strategies for diseases in which CRLs and autophagy are dysregulated, such as cancer and neurodegenerative conditions.
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19
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Li J, Zou J, Littlejohn R, Liu J, Su H. Neddylation, an Emerging Mechanism Regulating Cardiac Development and Function. Front Physiol 2020; 11:612927. [PMID: 33391028 PMCID: PMC7773599 DOI: 10.3389/fphys.2020.612927] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 11/20/2020] [Indexed: 12/13/2022] Open
Abstract
Defects in protein quality control have been increasingly recognized as pathogenic factors in the development of heart failure, a persistent devastating disease lacking efficacious therapies. Ubiquitin and ubiquitin-like proteins, a family of post-translational modifying polypeptides, play important roles in controlling protein quality by maintaining the stability and functional diversity of the proteome. NEDD8 (neural precursor cell expressed, developmentally downregulated 8), a small ubiquitin-like protein, was discovered two decades ago but until recently the biological significance of NEDD8 modifications (neddylation) in the heart has not been appreciated. In this review, we summarize the current knowledge of the biology of neddylation, highlighting several mechanisms by which neddylation regulates the function of its downstream targets, and discuss the expanding roles for neddylation in cardiac physiology and disease, with an emphasis on cardiac protein quality control. Finally, we outline challenges linked to the study of neddylation in health and disease.
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Affiliation(s)
- Jie Li
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Jianqiu Zou
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Rodney Littlejohn
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Jinbao Liu
- Protein Modification and Degradation Lab, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Huabo Su
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States
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20
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Mishra S, Dunkerly-Eyring BL, Keceli G, Ranek MJ. Phosphorylation Modifications Regulating Cardiac Protein Quality Control Mechanisms. Front Physiol 2020; 11:593585. [PMID: 33281625 PMCID: PMC7689282 DOI: 10.3389/fphys.2020.593585] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 09/28/2020] [Indexed: 12/12/2022] Open
Abstract
Many forms of cardiac disease, including heart failure, present with inadequate protein quality control (PQC). Pathological conditions often involve impaired removal of terminally misfolded proteins. This results in the formation of large protein aggregates, which further reduce cellular viability and cardiac function. Cardiomyocytes have an intricately collaborative PQC system to minimize cellular proteotoxicity. Increased expression of chaperones or enhanced clearance of misfolded proteins either by the proteasome or lysosome has been demonstrated to attenuate disease pathogenesis, whereas reduced PQC exacerbates pathogenesis. Recent studies have revealed that phosphorylation of key proteins has a potent regulatory role, both promoting and hindering the PQC machinery. This review highlights the recent advances in phosphorylations regulating PQC, the impact in cardiac pathology, and the therapeutic opportunities presented by harnessing these modifications.
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Affiliation(s)
- Sumita Mishra
- Division of Cardiology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Brittany L Dunkerly-Eyring
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University, Baltimore, MD, United States
| | - Gizem Keceli
- Division of Cardiology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Mark J Ranek
- Division of Cardiology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
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21
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Blondelle J, Biju A, Lange S. The Role of Cullin-RING Ligases in Striated Muscle Development, Function, and Disease. Int J Mol Sci 2020; 21:E7936. [PMID: 33114658 PMCID: PMC7672578 DOI: 10.3390/ijms21217936] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/11/2020] [Accepted: 10/13/2020] [Indexed: 02/07/2023] Open
Abstract
The well-orchestrated turnover of proteins in cross-striated muscles is one of the fundamental processes required for muscle cell function and survival. Dysfunction of the intricate protein degradation machinery is often associated with development of cardiac and skeletal muscle myopathies. Most muscle proteins are degraded by the ubiquitin-proteasome system (UPS). The UPS involves a number of enzymes, including E3-ligases, which tightly control which protein substrates are marked for degradation by the proteasome. Recent data reveal that E3-ligases of the cullin family play more diverse and crucial roles in cross striated muscles than previously anticipated. This review highlights some of the findings on the multifaceted functions of cullin-RING E3-ligases, their substrate adapters, muscle protein substrates, and regulatory proteins, such as the Cop9 signalosome, for the development of cross striated muscles, and their roles in the etiology of myopathies.
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Affiliation(s)
- Jordan Blondelle
- Department of Medicine, University of California, La Jolla, CA 92093, USA
| | - Andrea Biju
- Department of Medicine, University of California, La Jolla, CA 92093, USA
| | - Stephan Lange
- Department of Medicine, University of California, La Jolla, CA 92093, USA
- Department of Molecular and Clinical Medicine, University of Gothenburg, 41345 Gothenburg, Sweden
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22
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Zhang X, Zhu J, Yang B, Chen B, Wu J, Sha J, Bao E. Transcriptomic investigation reveals toxic damage due to tilmicosin and potential resistance against tilmicosin in primary chicken myocardial cells. Poult Sci 2020; 99:6355-6370. [PMID: 33248551 PMCID: PMC7705006 DOI: 10.1016/j.psj.2020.08.080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 08/25/2020] [Accepted: 08/27/2020] [Indexed: 01/10/2023] Open
Abstract
Tilmicosin is widely used to treat respiratory infections in animals and has been reported to induce cardiac damage and even sudden death. However, its exact mechanisms, especially in chickens, remain unclear. This study confirmed the dose-dependent damaging effect of tilmicosin on primary chicken myocardial cells. Primary chicken myocardial cells treated with tilmicosin (0.5 μg/mL) for 0 h, 12 h, and 48 h were subjected to RNA sequencing and bioinformatics analysis. Transcriptomic analysis revealed that cytokine-cytokine receptor interactions, calcium signaling pathway, peroxisomes, phagosomes, mitogen-activated protein kinase (MAPK) signaling pathway, and oxidative phosphorylation were significantly and differentially affected after 12 h or 48 h of tilmicosin treatment. Further evidence demonstrated consistently increased proinflammatory factors, peroxidation, and ferroptosis, and intracellular ion imbalance was caused by tilmicosin for 12 h, but this imbalance had recovered at 48 h. Meanwhile, intracellular resistance to tilmicosin-induced toxicity involved the active regulation of cyclooxygenase-1 and ATPase H+/K+-transporting beta subunit at 48 h, sustained activation of MAPK12, and downregulation of dual specificity phosphatase 10 at 12 h. In summary, this study suggests that tilmicosin exerts its cardiotoxicity in primary chicken myocardial cells through multiple mechanisms and finds several intracellular molecular targets to resist the toxicity.
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Affiliation(s)
- Xiaohui Zhang
- Department of basic veterinary medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Jie Zhu
- Department of basic veterinary medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Bo Yang
- Department of basic veterinary medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Bixia Chen
- Department of basic veterinary medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Jiaxin Wu
- Department of basic veterinary medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Junzhou Sha
- Department of basic veterinary medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Endong Bao
- Department of basic veterinary medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China.
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23
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Zhou ZG, Chen JB, Zhang RX, Ye L, Wang JC, Pan YX, Wang XH, Li WX, Zhang YJ, Xu L, Chen MS. Tescalcin is an unfavorable prognosis factor that regulats cell proliferation and survival in hepatocellular carcinoma patients. Cancer Commun (Lond) 2020; 40:355-369. [PMID: 32609436 PMCID: PMC7427307 DOI: 10.1002/cac2.12069] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 02/28/2020] [Accepted: 06/08/2020] [Indexed: 12/11/2022] Open
Abstract
Background Hepatocellular carcinoma (HCC) is a major health problem and a primary cause of cancer‐related death worldwide. Although great advances have achieved recently by large‐scale high‐throughput analysis, the precise molecular mechanism underlying HCC progression remains to be clearly elucidated. We investigated the relationship between Tescalcin (TESC), a candidate oncogene, and clinicopathological features of HCC patients and explored the role of TECS in HCC development. Methods To identify new genes involved in HCC development, we analyzed The Cancer Genome Atlas liver cancer database, and TESC was selected for further investigation. HCC tissue microarray analysis for TESC and its association with clinicopathological features were performed to investigate its clinical significance. TESC was knocked down by using short‐hairpin RNAs. Cell proliferation was analyzed by WST‐1 assay and cell counting. Cell apoptosis was tested by fluorescence‐activated cell sorting. A subcutaneous xenograft tumor model in nude mice was established to determine the in vivo function of TESC. Affymetrix microarray was used to identify its molecular mechanism. Results TESC was significantly increased in HCC tissues compared with the adjacent normal liver tissues. High expression of TESC was detected in 61 of 172 HCC patients by tissue microarray. Large tumor (> 5 cm) and elevated total bilirubin were associated with high TESC expression (both P < 0.050). In multivariate analysis, TESC was identified as an independent prognostic factor for short overall survival of HCC patients. TESC knockdown impaired HCC cell growth in vitro and in vivo. TESC knockdown significantly increased cell apoptosis in HCC cell lines. Furthermore, Affymetrix microarray analysis revealed that TESC knockdown inhibited tumor proliferation‐related pathways while activated cell death‐related pathways. Conclusion TESC was identified as an independent prognostic factor for short overall survival of HCC patients, and was critical for HCC cell proliferation and survival.
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Affiliation(s)
- Zhong-Guo Zhou
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China.,Department of Liver Surgery, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China
| | - Jin-Bin Chen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China.,Department of Liver Surgery, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China
| | - Rong-Xin Zhang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China.,Department of Colorectal Cancer, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China
| | - Ling Ye
- Department of Oncology, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, 510630, P. R. China
| | - Jun-Cheng Wang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China.,Department of Liver Surgery, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China
| | - Yang-Xun Pan
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China.,Department of Liver Surgery, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China
| | - Xiao-Hui Wang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China.,Department of Liver Surgery, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China
| | - Wen-Xuan Li
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China.,Department of Liver Surgery, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China
| | - Yao-Jun Zhang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China.,Department of Liver Surgery, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China
| | - Li Xu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China.,Department of Liver Surgery, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China
| | - Min-Shan Chen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China.,Department of Liver Surgery, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, P. R. China
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24
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Xiao P, Wang C, Li J, Su H, Yang L, Wu P, Lewno MT, Liu J, Wang X. COP9 Signalosome Suppresses RIPK1-RIPK3-Mediated Cardiomyocyte Necroptosis in Mice. Circ Heart Fail 2020; 13:e006996. [PMID: 32578441 DOI: 10.1161/circheartfailure.120.006996] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Mechanisms governing the induction of heart failure by the impairment of autophagy and the ubiquitin-proteasome system and the molecular pathways to cardiomyocyte necrosis remain incompletely understood. COPS8 is an essential subunit of the COP9 (COnstitutive Photomorphogenesis 9) signalosome, a key regulator of ubiquitination. Mice with cardiomyocyte-restricted knockout of Cops8 (Cops8-cko) show autophagic and ubiquitin-proteasome system malfunction and massive cardiomyocyte necrosis followed by acute heart failure and premature death, providing an excellent animal model to address the mechanistic gaps specified above. This study was conducted to determine the nature and underlying mechanisms of the cardiomyocyte necrosis in Cops8-cko mice. METHODS AND RESULTS Compared with littermate control mice, myocardial protein levels of key factors in the necroptotic pathway (RIPK1 [receptor-interacting protein kinase 1], RIPK3, MLKL [mixed lineage kinase-like], the RIPK1-bound RIPK3), protein carbonyls, full-length Casp8 (caspase 8), and BCL2, as well as histochemical staining of superoxide anions were significantly higher but the cleaved Casp8 and the Casp8 activity were significantly lower in Cops8-cko mice. In vivo cardiomyocyte uptake of Evan's blue dye was used as an indicator of necrosis. Cops8-cko mice treated with a RIPK1 kinase inhibitor (Nec-1 [Necrostatin-1]) showed less Evans blue dye uptake (0.005% versus 0.20%; P<0.0001) and longer median lifespan (32.5 versus 27 days; P<0.01) than those treated with vehicle control. RIPK3 haploinsufficiency showed similar rescuing effects on Cops8-cko but Cyclophilin D deficiency did the opposite. CONCLUSIONS Cardiac Cops8/COP9 signalosome malfunction causes RIPK1-RIPK3 dependent, but mitochondrial permeability transition pore independent, cardiomyocyte necroptosis in mice and the COP9 signalosome plays an indispensable role in suppressing cardiomyocyte necroptosis.
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Affiliation(s)
- Peng Xiao
- Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Vermillion, SD (P.X., C.W., J. Li, H.S., L.Y., P.W., M.T.L., X.W.)
| | - Changhua Wang
- Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Vermillion, SD (P.X., C.W., J. Li, H.S., L.Y., P.W., M.T.L., X.W.)
| | - Jie Li
- Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Vermillion, SD (P.X., C.W., J. Li, H.S., L.Y., P.W., M.T.L., X.W.).,Vascular Biology Center and Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA (J. Li, H.S.)
| | - Huabo Su
- Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Vermillion, SD (P.X., C.W., J. Li, H.S., L.Y., P.W., M.T.L., X.W.).,Vascular Biology Center and Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA (J. Li, H.S.)
| | - Liuqing Yang
- Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Vermillion, SD (P.X., C.W., J. Li, H.S., L.Y., P.W., M.T.L., X.W.)
| | - Penglong Wu
- Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Vermillion, SD (P.X., C.W., J. Li, H.S., L.Y., P.W., M.T.L., X.W.).,Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, State Key Laboratory of Respiratory Disease, School of Basic Medical Sciences, Affiliated Cancer Hospital of Guangzhou Medical University, Guangdong, China (P.W., J. Liu)
| | - Megan T Lewno
- Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Vermillion, SD (P.X., C.W., J. Li, H.S., L.Y., P.W., M.T.L., X.W.)
| | - Jinbao Liu
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, State Key Laboratory of Respiratory Disease, School of Basic Medical Sciences, Affiliated Cancer Hospital of Guangzhou Medical University, Guangdong, China (P.W., J. Liu)
| | - Xuejun Wang
- Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Vermillion, SD (P.X., C.W., J. Li, H.S., L.Y., P.W., M.T.L., X.W.)
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25
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Pan B, Li J, Parajuli N, Tian Z, Wu P, Lewno MT, Zou J, Wang W, Bedford L, Mayer RJ, Fang J, Liu J, Cui T, Su H, Wang X. The Calcineurin-TFEB-p62 Pathway Mediates the Activation of Cardiac Macroautophagy by Proteasomal Malfunction. Circ Res 2020; 127:502-518. [PMID: 32366200 DOI: 10.1161/circresaha.119.316007] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
RATIONALE The ubiquitin-proteasome system (UPS) and the autophagic-lysosomal pathway are pivotal to proteostasis. Targeting these pathways is emerging as an attractive strategy for treating cancer. However, a significant proportion of patients who receive a proteasome inhibitor-containing regime show cardiotoxicity. Moreover, UPS and autophagic-lysosomal pathway defects are implicated in cardiac pathogenesis. Hence, a better understanding of the cross-talk between the 2 catabolic pathways will help advance cardiac pathophysiology and medicine. OBJECTIVE Systemic proteasome inhibition (PSMI) was shown to increase p62/SQSTM1 expression and induce myocardial macroautophagy. Here we investigate how proteasome malfunction activates cardiac autophagic-lysosomal pathway. METHODS AND RESULTS Myocardial macroautophagy, TFEB (transcription factor EB) expression and activity, and p62 expression were markedly increased in mice with either cardiomyocyte-restricted ablation of Psmc1 (an essential proteasome subunit gene) or pharmacological PSMI. In cultured cardiomyocytes, PSMI-induced increases in TFEB activation and p62 expression were blunted by pharmacological and genetic calcineurin inhibition and by siRNA-mediated Molcn1 silencing. PSMI induced remarkable increases in myocardial autophagic flux in wild type mice but not p62 null (p62-KO) mice. Bortezomib-induced left ventricular wall thickening and diastolic malfunction was exacerbated by p62 deficiency. In cultured cardiomyocytes from wild type mice but not p62-KO mice, PSMI induced increases in LC3-II flux and the lysosomal removal of ubiquitinated proteins. Myocardial TFEB activation by PSMI as reflected by TFEB nuclear localization and target gene expression was strikingly less in p62-KO mice compared with wild type mice. CONCLUSIONS (1) The activation of cardiac macroautophagy by proteasomal malfunction is mediated by the Mocln1-calcineurin-TFEB-p62 pathway; (2) p62 unexpectedly exerts a feed-forward effect on TFEB activation by proteasome malfunction; and (3) targeting the Mcoln1 (mucolipin1)-calcineurin-TFEB-p62 pathway may provide new means to intervene cardiac autophagic-lysosomal pathway activation during proteasome malfunction.
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Affiliation(s)
- Bo Pan
- From the Division of Basic Biomedical Sciences, University of South Dakota, Sanford School of Medicine, Vermillion (B.P., J. Li, N.P., Z.T., P.W., M.T.L., H.S., X.W.)
| | - Jie Li
- From the Division of Basic Biomedical Sciences, University of South Dakota, Sanford School of Medicine, Vermillion (B.P., J. Li, N.P., Z.T., P.W., M.T.L., H.S., X.W.).,Vascular Biology Center and Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University (J. Li, J.Z., W.W., H.S.)
| | - Nirmal Parajuli
- From the Division of Basic Biomedical Sciences, University of South Dakota, Sanford School of Medicine, Vermillion (B.P., J. Li, N.P., Z.T., P.W., M.T.L., H.S., X.W.)
| | - Zongwen Tian
- From the Division of Basic Biomedical Sciences, University of South Dakota, Sanford School of Medicine, Vermillion (B.P., J. Li, N.P., Z.T., P.W., M.T.L., H.S., X.W.).,Department of Anatomy, Wuhan University College of Basic Medical Sciences, Hubei, China (Z.T.)
| | - Penglong Wu
- From the Division of Basic Biomedical Sciences, University of South Dakota, Sanford School of Medicine, Vermillion (B.P., J. Li, N.P., Z.T., P.W., M.T.L., H.S., X.W.).,Guangzhou Institute of Oncology, Tumor Hospital, Key Laboratory of Protein Modification and Degradation, State Key Laboratory of Respiratory Disease, School of Basic Medical Sciences, Guangzhou Medical University, Guangdong, China (P.W., W.W., J. Liu)
| | - Megan T Lewno
- From the Division of Basic Biomedical Sciences, University of South Dakota, Sanford School of Medicine, Vermillion (B.P., J. Li, N.P., Z.T., P.W., M.T.L., H.S., X.W.)
| | - Jianqiu Zou
- Vascular Biology Center and Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University (J. Li, J.Z., W.W., H.S.)
| | - Wenjuan Wang
- Vascular Biology Center and Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University (J. Li, J.Z., W.W., H.S.).,Guangzhou Institute of Oncology, Tumor Hospital, Key Laboratory of Protein Modification and Degradation, State Key Laboratory of Respiratory Disease, School of Basic Medical Sciences, Guangzhou Medical University, Guangdong, China (P.W., W.W., J. Liu)
| | - Lynn Bedford
- School of Life Sciences, University of Nottingham, United Kingdom (L.B.)
| | - R John Mayer
- The University of Nottingham Medical School, Queen's Medical Centre, United Kingdom (R.J.M.)
| | - Jing Fang
- Department of Drug Discovery and Biomedical Sciences (J.F.), University of South Carolina College of Pharmacy, Columbia
| | - Jinbao Liu
- Guangzhou Institute of Oncology, Tumor Hospital, Key Laboratory of Protein Modification and Degradation, State Key Laboratory of Respiratory Disease, School of Basic Medical Sciences, Guangzhou Medical University, Guangdong, China (P.W., W.W., J. Liu)
| | - Taixing Cui
- Department of Anatomy and Cell Biology (T.C.), University of South Carolina College of Pharmacy, Columbia
| | - Huabo Su
- From the Division of Basic Biomedical Sciences, University of South Dakota, Sanford School of Medicine, Vermillion (B.P., J. Li, N.P., Z.T., P.W., M.T.L., H.S., X.W.).,Vascular Biology Center and Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University (J. Li, J.Z., W.W., H.S.)
| | - Xuejun Wang
- From the Division of Basic Biomedical Sciences, University of South Dakota, Sanford School of Medicine, Vermillion (B.P., J. Li, N.P., Z.T., P.W., M.T.L., H.S., X.W.)
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26
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Wang X, Wang H. Priming the Proteasome to Protect against Proteotoxicity. Trends Mol Med 2020; 26:639-648. [PMID: 32589934 DOI: 10.1016/j.molmed.2020.02.007] [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: 12/26/2019] [Revised: 02/23/2020] [Accepted: 02/27/2020] [Indexed: 02/07/2023]
Abstract
Increased proteotoxic stress (IPTS) resulting from the increased production or decreased removal of abnormally folded proteins is recognized as an important pathogenic factor for a large group of highly disabling and life-threatening human diseases, such as neurodegenerative disorders and many heart diseases. The proteasome is pivotal to the timely removal of abnormal proteins but its functional capacity often becomes inadequate in the disease conditions; consequently, proteasome functional insufficiency in return exacerbates IPTS. Recent research in proteasome biology reveals that the proteasome can be activated by endogenous protein kinases, making it possible to pharmacologically prime the proteasome for treating diseases with IPTS.
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Affiliation(s)
- Xuejun Wang
- University of South Dakota Sanford School of Medicine, Vermillion, SD 57069, USA.
| | - Hongmin Wang
- University of South Dakota Sanford School of Medicine, Vermillion, SD 57069, USA
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27
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Gao J, Shao K, Chen X, Li Z, Liu Z, Yu Z, Aung LHH, Wang Y, Li P. The involvement of post-translational modifications in cardiovascular pathologies: Focus on SUMOylation, neddylation, succinylation, and prenylation. J Mol Cell Cardiol 2020; 138:49-58. [DOI: 10.1016/j.yjmcc.2019.11.146] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 11/01/2019] [Accepted: 11/13/2019] [Indexed: 12/12/2022]
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28
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Rao F, Lin H, Su Y. Cullin-RING Ligase Regulation by the COP9 Signalosome: Structural Mechanisms and New Physiologic Players. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1217:47-60. [PMID: 31898221 DOI: 10.1007/978-981-15-1025-0_4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The Cullin-RING E3 ligases (CRLs) are major ubiquitylation machineries regulated by reversible cycles of neddylation and deneddylation. The deneddylase COP9 Signalosome (CSN) terminates CRL catalytic cycle. CSN also provides a docking platform for several kinases and deubiquitinases that might play a role in regulating CRL. Recently, remarkable progress has been made in elucidating the biochemical principles and physiological implications of such exquisite regulation. The cryo-EM structures of CRL-CSN complexes provide the biochemical basis of their cognate interactions and reveal potential regulatory mechanisms during complex disassembly. Moreover, novel players beyond the canonical eight subunits of CSN were identified. This includes CSNAP, a potential 9th CSN subunit with regulatory functions, and the metabolite inositol hexakisphosphate (IP6), which enhances CRL-CSN complex formation, with IP6-metabolizing enzymes possibly instilling dynamics to the CRL-CSN system. Here, we review and summarize these new mechanistic insights along with progress in understanding CSN biology based on model organisms with genetically edited CSN subunits.
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Affiliation(s)
- Feng Rao
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Southern University of Science and Technology, Shenzhen, Guangdong, China.
| | - Hong Lin
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Yang Su
- Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Southern University of Science and Technology, Shenzhen, Guangdong, China
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29
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Li J, Johnson JA, Su H. Ubiquitin and Ubiquitin-like proteins in cardiac disease and protection. Curr Drug Targets 2019; 19:989-1002. [PMID: 26648080 DOI: 10.2174/1389450117666151209114608] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 11/01/2015] [Indexed: 01/10/2023]
Abstract
Post-translational modification represents an important mechanism to regulate protein function in cardiac cells. Ubiquitin (Ub) and ubiquitin-like proteins (UBLs) are a family of protein modifiers that share a certain extent of sequence and structure similarity. Conjugation of Ub or UBLs to target proteins is dynamically regulated by a set of UBL-specific enzymes and modulates the physical and physiological properties of protein substrates. Ub and UBLs control a strikingly wide spectrum of cellular processes and not surprisingly are involved in the development of multiple human diseases including cardiac diseases. Further identification of novel UBL targets will expand our understanding of the functional diversity of UBL pathways in physiology and pathology. Here we review recent findings on the mechanisms, proteome and functions of a subset of UBLs and highlight their potential impacts on the development and progression of various forms of cardiac diseases.
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Affiliation(s)
- Jie Li
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - John A Johnson
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Huabo Su
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States.,Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA, United States
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30
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Milic J, Tian Y, Bernhagen J. Role of the COP9 Signalosome (CSN) in Cardiovascular Diseases. Biomolecules 2019; 9:biom9060217. [PMID: 31195722 PMCID: PMC6628250 DOI: 10.3390/biom9060217] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/02/2019] [Accepted: 06/03/2019] [Indexed: 12/19/2022] Open
Abstract
The constitutive photomorphogenesis 9 (COP9) signalosome (CSN) is an evolutionarily conserved multi-protein complex, consisting of eight subunits termed CSN1-CSN8. The main biochemical function of the CSN is the control of protein degradation via the ubiquitin-proteasome-system through regulation of cullin-RING E3-ligase (CRL) activity by deNEDDylation of cullins, but the CSN also serves as a docking platform for signaling proteins. The catalytic deNEDDylase (isopeptidase) activity of the complex is executed by CSN5, but only efficiently occurs in the three-dimensional architectural context of the complex. Due to its positioning in a central cellular pathway connected to cell responses such as cell-cycle, proliferation, and signaling, the CSN has been implicated in several human diseases, with most evidence available for a role in cancer. However, emerging evidence also suggests that the CSN is involved in inflammation and cardiovascular diseases. This is both due to its role in controlling CRLs, regulating components of key inflammatory pathways such as nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB), and complex-independent interactions of subunits such as CSN5 with inflammatory proteins. In this case, we summarize and discuss studies suggesting that the CSN may have a key role in cardiovascular diseases such as atherosclerosis and heart failure. We discuss the implicated molecular mechanisms ranging from inflammatory NF-κB signaling to proteotoxicity and necrosis, covering disease-relevant cell types such as myeloid and endothelial cells or cardiomyocytes. While the CSN is considered to be disease-exacerbating in most cancer entities, the cardiovascular studies suggest potent protective activities in the vasculature and heart. The underlying mechanisms and potential therapeutic avenues will be critically discussed.
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Affiliation(s)
- Jelena Milic
- Chair of Vascular Biology, Institute for Stroke and Dementia Research (ISD), Klinikum der Universität München (KUM), Ludwig-Maximilians-University (LMU), 81377 Munich, Germany.
| | - Yuan Tian
- Chair of Vascular Biology, Institute for Stroke and Dementia Research (ISD), Klinikum der Universität München (KUM), Ludwig-Maximilians-University (LMU), 81377 Munich, Germany.
| | - Jürgen Bernhagen
- Chair of Vascular Biology, Institute for Stroke and Dementia Research (ISD), Klinikum der Universität München (KUM), Ludwig-Maximilians-University (LMU), 81377 Munich, Germany.
- Munich Heart Alliance, 80802 Munich, Germany.
- Munich Cluster for Systems Neurology (SyNergy), 81377 Munich, Germany.
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31
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Wang X, Sun D, Hu Y, Xu X, Jiang W, Shang H, Cui D. The roles of oxidative stress and Beclin-1 in the autophagosome clearance impairment triggered by cardiac arrest. Free Radic Biol Med 2019; 136:87-95. [PMID: 30951836 DOI: 10.1016/j.freeradbiomed.2018.12.039] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 12/19/2018] [Accepted: 12/19/2018] [Indexed: 02/03/2023]
Abstract
During cardiac arrest and return of spontaneous circulation (CA-ROSC), autophagosome clearance in the cortex is progressively impaired, but the role of reactive oxygen species (ROS) in this process and the mechanism underlying the autophagy impairment remain unknown. In this study, we investigated the impacts of ROS on the autophagy-lysosome pathway after CA-ROSC in rats. Cortices from CA-ROSC rats revealed accumulation of LC3, p62 and ubiquitin, indicating impaired autophagic flux. Furthermore, impairment of autophagic flux was related to lysosomal lesion, as indicated by decreased cathepsin D and lysosomal-associated membrane protein 2 (LAMP2) levels after CA-ROSC. In vitro, the resulting ROS generation blocked autophagosome processing and caused accumulation of LC3-II, ubiquitin, and p62, leading to mitochondrial dysfunction and cell death; this outcome was alleviated by cyclosporine A (CsA) pretreatment. Interestingly, ischemia/reperfusion injury was connected with ROS-mediated Beclin-1 upregulation and a reduction in LAMP2, which is a pivotal protein in the autophagy-lysosome pathway. Recovery of the LAMP2 levels and partial Beclin-1 silencing restored the autophagic flux and reduced cell death after CA-ROSC. Taken together, our data indicate that CA-ROSC injury impairs autophagosome clearance partially through a ROS-induced decline in LAMP2 and increase in Beclin-1, leading to increased neuronal cell death.
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Affiliation(s)
- Xintao Wang
- Department of Anesthesiology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, China
| | - Dawei Sun
- Department of Anesthesiology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, China
| | - Yue Hu
- Department of Anesthesiology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, China
| | - Xiaotao Xu
- Department of Anesthesiology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, China
| | - Wei Jiang
- Department of Anesthesiology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, China
| | - Hanbing Shang
- Department of Neurosurgery, Shanghai Ruijin Hospital Affiliated with Medical School of Shanghai Jiaotong University, China.
| | - Derong Cui
- Department of Anesthesiology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, China.
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Mao Z, Sang MM, Chen C, Zhu WT, Gong YS, Pei DS. CSN6 Promotes the Migration and Invasion of Cervical Cancer Cells by Inhibiting Autophagic Degradation of Cathepsin L. Int J Biol Sci 2019; 15:1310-1324. [PMID: 31223289 PMCID: PMC6567803 DOI: 10.7150/ijbs.32987] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 03/13/2019] [Indexed: 01/14/2023] Open
Abstract
CSN6 is one subunit of the highly conserved constitutive photomorphogenesis 9 (COP9) signalosome (CSN), which is overexpressed in many types of cancers, and has received great attention as a regulator of the degradation of cancer-related proteins, suggesting its importance in oncogenic activity. CSN6 has been shown to be overexpressed in cervical cancer (CC) and associated with CC development. CC remains to be one of the most aggressive cancers affecting women. Cathepsin L (CTSL), significantly associated with the autophagy, plays a critical role in degradation of extracellular matrix for metastasis. However, the detailed biological functions of CSN6 on CTSL in CC metastasis have not been well clarified. Our data has shown that CSN6 and CTSL are positively correlated. The overexpression of CSN6 and CTSL might be a strong indicator for CC enhanced aggressiveness. CSN6 could suppress the degradation of CTSL, then facilitated the migration and invasion of CC cells. Interestingly, our results indicated that autophagy is essential for decreasing CTSL, while CSN6 could inhibit the autophagy ability of CC cells. In addition, blocking of the mammalian target of rapamycin (mTOR) pathway reversed CSN6-mediated autophagy inhibition. We further demonstrated that CSN6 positively regulated CTSL expression through an autophagy-lysosomal system. Taken together, we concluded that CSN6 might promote the migration and invasion of cervical cancer cells by inhibiting autophagic degradation of CTSL and serve as a potential gene therapy target for the treatment of CC metastasis.
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Affiliation(s)
- Zun Mao
- Laboratory of Clinical and Experimental Pathology, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China
| | - Miao-Miao Sang
- Department of Rehabilitation, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - Cheng Chen
- Laboratory of Clinical and Experimental Pathology, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China
| | - Wen-Tao Zhu
- Laboratory of Clinical and Experimental Pathology, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China
| | - Yu-Sen Gong
- Laboratory of Clinical and Experimental Pathology, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China
| | - Dong-Sheng Pei
- Laboratory of Clinical and Experimental Pathology, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China
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Zou J, Ma W, Littlejohn R, Li J, Stansfield BK, Kim IM, Liu J, Zhou J, Weintraub NL, Su H. Transient inhibition of neddylation at neonatal stage evokes reversible cardiomyopathy and predisposes the heart to isoproterenol-induced heart failure. Am J Physiol Heart Circ Physiol 2019; 316:H1406-H1416. [PMID: 30925068 DOI: 10.1152/ajpheart.00806.2018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Alterations in perinatal conditions (such as preterm birth) is linked to adult health and disease, in particular, the cardiovascular system. Neddylation, a novel posttranslational modification through which the ubiquitin-like protein NEDD8 is conjugated to protein substrates, has emerged as an important mechanism regulating embryonic cardiac chamber maturation. However, the importance of neddylation in postpartum cardiac development has not been investigated. Here, we aimed to determine whether transient, postnatal inhibition of neddylation has immediate and prolonged impact on the structure and function of the neonatal and adult hearts. Sprague-Dawley pups were given three intraperitoneal injections of MLN4924 (MLN), a specific neddylation inhibitor, at postnatal days (P)1, 3, and 5. Cardiac structure and function were temporally assessed during aging and after 2 wk of isoproterenol (ISO) infusion in adulthood. MLN treatment resulted in modest reduction of neddylated proteins in neonatal hearts. The MLN-treated rats developed cardiac hypertrophy and dysfunction by P7, which was accompanied by significantly reduced cardiomyocyte proliferation. At 3 mo of age, cardiac contractile function was restored in MLN-treated rats, but MLN-treated hearts displayed hypertrophic phenotype. Whereas ISO infusion triggered compensatory cardiac hypertrophy without impairing cardiac contractility in the control rats, the MLN-treated rats displayed a similar degree of hypertrophy, which quickly progressed to decompensation with ventricular wall thinning, chamber dilatation, and reduced ejection fraction as well as exacerbated pathological cardiac remodeling. Our findings suggest that neddylation is required for postnatal cardiac development and that perturbation of neddylation during development predisposes adult hearts to cardiac failure under stress conditions. NEW & NOTEWORTHY Our study demonstrates that perinatal perturbation of neddylation induces cardiomyopathy, impairs postnatal cardiac development, and increases susceptibility to catecholamine-induced cardiac dysfunction. The results reveal a previously unappreciated role of neddylation in postnatal cardiac maturation and call for close monitoring for the potential cardiotoxicity of MLN4924 (pevonedistat) and other agents that modify neddylation, especially in pregnant women and preadolescents.
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Affiliation(s)
- Jianqiu Zou
- Vascular Biology Center, Medical College of Georgia, Augusta University , Augusta, Georgia
| | - Wenxia Ma
- Vascular Biology Center, Medical College of Georgia, Augusta University , Augusta, Georgia
| | - Rodney Littlejohn
- Vascular Biology Center, Medical College of Georgia, Augusta University , Augusta, Georgia
| | - Jie Li
- Vascular Biology Center, Medical College of Georgia, Augusta University , Augusta, Georgia
| | - Brian K Stansfield
- Vascular Biology Center, Medical College of Georgia, Augusta University , Augusta, Georgia.,Department of Pediatrics, Medical College of Georgia, Augusta University , Augusta, Georgia
| | - Il-Man Kim
- Vascular Biology Center, Medical College of Georgia, Augusta University , Augusta, Georgia
| | - Jinbao Liu
- Protein Modification and Degradation Laboratory, School of Basic Medical Sciences, Guangzhou Medical University , Guangzhou , China
| | - Jiliang Zhou
- Department of Medicine, Medical College of Georgia, Augusta University , Augusta, Georgia
| | - Neal L Weintraub
- Vascular Biology Center, Medical College of Georgia, Augusta University , Augusta, Georgia.,Department of Medicine, Medical College of Georgia, Augusta University , Augusta, Georgia
| | - Huabo Su
- Vascular Biology Center, Medical College of Georgia, Augusta University , Augusta, Georgia.,Protein Modification and Degradation Laboratory, School of Basic Medical Sciences, Guangzhou Medical University , Guangzhou , China.,Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University , Augusta, Georgia
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34
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Hu C, Tian Y, Xu H, Pan B, Terpstra EM, Wu P, Wang H, Li F, Liu J, Wang X. Inadequate ubiquitination-proteasome coupling contributes to myocardial ischemia-reperfusion injury. J Clin Invest 2018; 128:5294-5306. [PMID: 30204128 DOI: 10.1172/jci98287] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 09/04/2018] [Indexed: 12/14/2022] Open
Abstract
The ubiquitin-proteasome system (UPS) degrades a protein molecule via 2 main steps: ubiquitination and proteasomal degradation. Extraproteasomal ubiquitin receptors are thought to couple the 2 steps, but this proposition has not been tested in vivo with vertebrates. More importantly, impaired UPS performance plays a major role in cardiac pathogenesis, including myocardial ischemia-reperfusion injury (IRI), but the molecular basis of UPS impairment remains poorly understood. Ubiquilin1 is a bona fide extraproteasomal ubiquitin receptor. Here, we report that mice with a cardiomyocyte-restricted knockout of Ubiquilin1 (Ubqln1-CKO mice) accumulated a surrogate UPS substrate (GFPdgn) and increased myocardial ubiquitinated proteins without altering proteasome activities, resulting in late-onset cardiomyopathy and a markedly shortened life span. When subject to regional myocardial ischemia-reperfusion, young Ubqln1-CKO mice showed substantially exacerbated cardiac malfunction and enlarged infarct size, and conversely, mice with transgenic Ubqln1 overexpression displayed attenuated IRI. Furthermore, Ubqln1 overexpression facilitated proteasomal degradation of oxidized proteins and the degradation of a UPS surrogate substrate in cultured cardiomyocytes without increasing autophagic flux. These findings demonstrate that Ubiquilin1 is essential to cardiac ubiquitination-proteasome coupling and that an inadequacy in the coupling represents a major pathogenic factor for myocardial IRI; therefore, strategies to strengthen coupling have the potential to reduce IRI.
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Affiliation(s)
- Chengjun Hu
- Department of Human Anatomy, Wuhan University College of Basic Medical Sciences, Wuhan, Hubei, China.,Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion, South Dakota, USA
| | - Yihao Tian
- Department of Human Anatomy, Wuhan University College of Basic Medical Sciences, Wuhan, Hubei, China.,Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion, South Dakota, USA
| | - Hongxin Xu
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion, South Dakota, USA.,Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
| | - Bo Pan
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion, South Dakota, USA
| | - Erin M Terpstra
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion, South Dakota, USA
| | - Penglong Wu
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion, South Dakota, USA.,Protein Modification and Degradation Lab, School of Basic Medical Sciences, Affiliated Tumor Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Hongmin Wang
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion, South Dakota, USA
| | - Faqian Li
- Department of Pathology and Laboratory Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Jinbao Liu
- Protein Modification and Degradation Lab, School of Basic Medical Sciences, Affiliated Tumor Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Xuejun Wang
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion, South Dakota, USA
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Zhang F, Yan T, Guo W, Sun K, Wang S, Bao X, Liu K, Zheng B, Zhang H, Ren T. Novel oncogene COPS3 interacts with Beclin1 and Raf-1 to regulate metastasis of osteosarcoma through autophagy. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2018; 37:135. [PMID: 29970115 PMCID: PMC6029018 DOI: 10.1186/s13046-018-0791-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 06/13/2018] [Indexed: 01/02/2023]
Abstract
Background Expression of COP9 signalosome subunit 3 (COPS3), an oncogene overexpressed in osteosarcoma, has been demonstrated to be significantly correlated with tumor metastasis. However, the underlying mechanism by which COPS3 promotes metastasis of osteosarcoma and its role in autophagy remain unknown. Methods The expression of COPS3 was detected in primary osteosarcoma tissues and matching lung metastasis tissues by immunohistochemistry (IHC). The effect of COPS3 on the metastasis of osteosarcoma cells was investigated by transwell, wound healing assays and animal studies. Indicated proteins was analyzed by western blotting when COPS3 was knockdown or overexpressed. The COPS3 Interacting protein was determined by immunoprecipitation assay. The relationship between COPS3 and autophagy was detected by western blotting and immunofluorescence. Results We found that knockdown of COPS3 significantly reduced the lung metastasis of osteosarcoma cells in a mouse model, coinciding with downregulation of mitogen-activated protein kinase (MEK) and extracellular signal-regulated kinase (ERK) signaling. The silencing of COPS3 also inhibited the epithelial–mesenchymal transition (EMT) through the 90 kDa ribosomal S6 kinases (RSK), a family of signal transduction proteins downstream of MEK/ERK. Reciprocal immunoprecipitation assays revealed that COPS3 directly interacts with Raf-1, an upstream regulator of MEK/ERK. Surprisingly, Beclin1, an important autophagic protein, appeared in the COPS3-immunoprecipitates, along with the autophagic markers LC3-I and LC3-II. Loss of COPS3 completely inhibited H2O2-induced autophagic flux and reduced Beclin1 expression. Additionally, autophagy inhibitor or silencing of Beclin1 both decreased cell metastasis. Conclusions Taken together, these data reveal a novel function of COPS3 in the regulation of autophagy and highlight the relationship between autophagy and metastasis in osteosarcoma cells. Electronic supplementary material The online version of this article (10.1186/s13046-018-0791-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Fan Zhang
- Musculoskeletal Tumor Center, Peking University People's Hospital, No. 11 Xizhimen South Street, Beijing, 100044, China.,Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, 100044, China
| | - Taiqiang Yan
- Musculoskeletal Tumor Center, Peking University People's Hospital, No. 11 Xizhimen South Street, Beijing, 100044, China. .,Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, 100044, China.
| | - Wei Guo
- Musculoskeletal Tumor Center, Peking University People's Hospital, No. 11 Xizhimen South Street, Beijing, 100044, China.,Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, 100044, China
| | - Kunkun Sun
- Department of Pathology, Peking University People's Hospital, Beijing, 100044, China
| | - Shidong Wang
- Musculoskeletal Tumor Center, Peking University People's Hospital, No. 11 Xizhimen South Street, Beijing, 100044, China.,Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, 100044, China
| | - Xing Bao
- Musculoskeletal Tumor Center, Peking University People's Hospital, No. 11 Xizhimen South Street, Beijing, 100044, China.,Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, 100044, China
| | - Kuisheng Liu
- Musculoskeletal Tumor Center, Peking University People's Hospital, No. 11 Xizhimen South Street, Beijing, 100044, China.,Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, 100044, China
| | - Bingxin Zheng
- Musculoskeletal Tumor Center, Peking University People's Hospital, No. 11 Xizhimen South Street, Beijing, 100044, China.,Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, 100044, China
| | - Hongliang Zhang
- Musculoskeletal Tumor Center, Peking University People's Hospital, No. 11 Xizhimen South Street, Beijing, 100044, China.,Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, 100044, China
| | - Tingting Ren
- Musculoskeletal Tumor Center, Peking University People's Hospital, No. 11 Xizhimen South Street, Beijing, 100044, China.,Beijing Key Laboratory of Musculoskeletal Tumor, Beijing, 100044, China
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36
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Neddylation mediates ventricular chamber maturation through repression of Hippo signaling. Proc Natl Acad Sci U S A 2018; 115:E4101-E4110. [PMID: 29632206 DOI: 10.1073/pnas.1719309115] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
During development, ventricular chamber maturation is a crucial step in the formation of a functionally competent postnatal heart. Defects in this process can lead to left ventricular noncompaction cardiomyopathy and heart failure. However, molecular mechanisms underlying ventricular chamber development remain incompletely understood. Neddylation is a posttranslational modification that attaches ubiquitin-like protein NEDD8 to protein targets via NEDD8-specific E1-E2-E3 enzymes. Here, we report that neddylation is temporally regulated in the heart and plays a key role in cardiac development. Cardiomyocyte-specific knockout of NAE1, a subunit of the E1 neddylation activating enzyme, significantly decreased neddylated proteins in the heart. Mice lacking NAE1 developed myocardial hypoplasia, ventricular noncompaction, and heart failure at late gestation, which led to perinatal lethality. NAE1 deletion resulted in dysregulation of cell cycle-regulatory genes and blockade of cardiomyocyte proliferation in vivo and in vitro, which was accompanied by the accumulation of the Hippo kinases Mst1 and LATS1/2 and the inactivation of the YAP pathway. Furthermore, reactivation of YAP signaling in NAE1-inactivated cardiomyocytes restored cell proliferation, and YAP-deficient hearts displayed a noncompaction phenotype, supporting an important role of Hippo-YAP signaling in NAE1-depleted hearts. Mechanistically, we found that neddylation regulates Mst1 and LATS2 degradation and that Cullin 7, a NEDD8 substrate, acts as the ubiquitin ligase of Mst1 to enable YAP signaling and cardiomyocyte proliferation. Together, these findings demonstrate a role for neddylation in heart development and, more specifically, in the maturation of ventricular chambers and also identify the NEDD8 substrate Cullin 7 as a regulator of Hippo-YAP signaling.
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Reihe CA, Pekas N, Wu P, Wang X. Systemic inhibition of neddylation by 3-day MLN4924 treatment regime does not impair autophagic flux in mouse hearts and brains. AMERICAN JOURNAL OF CARDIOVASCULAR DISEASE 2017; 7:134-150. [PMID: 29348974 PMCID: PMC5768871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 12/15/2017] [Indexed: 06/07/2023]
Abstract
Beyond helping the cell survive from energy starvation via self-eating a portion of cytoplasm, macroautophagy is also capable of targeted removal of defective organelles or cytoplasmic aberrant protein aggregates, thereby playing an important role in quality control in the cell. Impaired or suppressed macroautophagy activity is associated with the progression from a large subset of heart diseases to heart failure and with the development of the vast majority of, if not all, neurodegenerative diseases, the leading causes of death and disability in humans. Hence, a better understanding of the impact of existing and upcoming pharmacotherapies on macroautophagy in the heart and brain will undoubtedly benefit the search for safer and more effective treatment to improve human health. Neddylation is a recently recognized posttranslational modification process that modifies a subset of cellular proteins and is, by virtue of regulating Cullin-RING ligases, essential to ~20% ubiquitin-proteasome system (UPS)-mediated protein degradation. MLN4924 (Pevonedistat), a specific inhibitor of neddylation that promises to become a new anti-malignancy agent, is capable of inhibiting UPS-mediated progression of the cell cycle and activating macroautophagy in cancer cells. However, no reported study has tested the impact of systemic inhibition of neddylation on autophagic activity in a post-mitotic organ such as the heart and brain. This study was conducted to fill this gap. Sixteen GFP-LC3 transgenic mice of mixed sexes were divided equally into either MLN4924-treated or vehicle-treated groups and were treated respectively with MLN4924 (30 mg/kg, s.c., twice a day × 3 days) or equal volume of solvent. The resultant changes in myocardial levels of neddylated cullin 1 as well as autophagic flux in cardiac and brain tissues were assessed. The effectiveness of the MLN4924 regime was verified by myocardial accumulation of neddylated cullin 1. Myocardial LC3-II flux and free GFP levels were comparable between the MLN4924 and the vehicle groups whereas the protein level of p62, a bona fide substrate of macroautophagy, in the brain was significantly decreased by the MLN4924 treatment. Our data suggest that systemic inhibition of neddylation by a 3-day MLN4924 treatment regime does not suppress macroautophagy activities in the heart and brain.
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Affiliation(s)
- Casey A Reihe
- Division of Basic Biomedical Science, Sanford School of Medicine of The University of South DakotaSD 57069, USA
| | - Nickolas Pekas
- Division of Basic Biomedical Science, Sanford School of Medicine of The University of South DakotaSD 57069, USA
| | - Penglong Wu
- Division of Basic Biomedical Science, Sanford School of Medicine of The University of South DakotaSD 57069, USA
- Department of Pathophysiology, Guangzhou Medical University College of Basic SciencesGuangzhou, Guangdong, China
| | - Xuejun Wang
- Division of Basic Biomedical Science, Sanford School of Medicine of The University of South DakotaSD 57069, USA
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38
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Autophagy in health and disease: focus on the cardiovascular system. Essays Biochem 2017; 61:721-732. [PMID: 29233881 DOI: 10.1042/ebc20170022] [Citation(s) in RCA: 108] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 10/03/2017] [Accepted: 10/16/2017] [Indexed: 12/20/2022]
Abstract
Autophagy is a highly conserved mechanism of lysosome-mediated protein and organelle degradation that plays a crucial role in maintaining cellular homeostasis. In the last few years, specific functions for autophagy have been identified in many tissues and organs. In the cardiovascular system, autophagy appears to be essential to heart and vessel homeostasis and function; however defective or excessive autophagy activity seems to contribute to major cardiovascular disorders including heart failure (HF) or atherosclerosis. Here, we review the current knowledge on the role of cardiovascular autophagy in physiological and pathophysiological conditions.
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Pan B, Zhang H, Cui T, Wang X. TFEB activation protects against cardiac proteotoxicity via increasing autophagic flux. J Mol Cell Cardiol 2017; 113:51-62. [PMID: 28993153 DOI: 10.1016/j.yjmcc.2017.10.003] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 09/25/2017] [Accepted: 10/05/2017] [Indexed: 12/19/2022]
Abstract
Insufficient lysosomal removal of autophagic cargoes in cardiomyocytes has been suggested as a main cause for the impairment of the autophagic-lysosomal pathway (ALP) in many forms of heart disease including cardiac proteinopathy and may play an important pathogenic role; however, the molecular basis and the correcting strategy for the cardiac ALP insufficiency require further investigation. The present study was sought to determine whether myocardial expression and activity of TFEB, the recently identified ALP master regulator, are impaired in a cardiac proteinopathy mouse model and to determine the effect of genetic manipulation of TFEB expression on autophagy and proteotoxicity in a cardiomyocyte model of proteinopathy. We found that increased myocardial TFEB mRNA levels and a TFEB protein isoform switch were associated with marked decreases in the mRNA levels of representative TFEB target genes and increased mTORC1 activation, in mice with cardiac transgenic expression of a missense (R120G) mutant αB-crystallin (CryABR120G), a well-established model of cardiac proteinopathy. Using neonatal rat ventricular cardiomyocyte cultures, we demonstrated that downregulation of TFEB decreased autophagic flux in cardiomyocytes both at baseline and during CryABR120G overexpression and increased CryABR120G protein aggregates. Conversely, forced TFEB overexpression increased autophagic flux and remarkably attenuated the CryABR120G overexpression-induced accumulation of ubiquitinated proteins, caspase 3 cleavage, LDH leakage, and decreases in cell viability. Moreover, these protective effects of TFEB were dramatically diminished by inhibiting autophagy. We conclude that myocardial TFEB signaling is impaired in cardiac proteinopathy and forced TFEB overexpression protects against proteotoxicity in cardiomyocytes through improving ALP activity.
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Affiliation(s)
- Bo Pan
- Division of Basic Biomedical sciences, University of South Dakota Sanford School of Medicine, Vermillion, SD 57069, USA
| | - Hanming Zhang
- Division of Basic Biomedical sciences, University of South Dakota Sanford School of Medicine, Vermillion, SD 57069, USA
| | - Taixing Cui
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Xuejun Wang
- Division of Basic Biomedical sciences, University of South Dakota Sanford School of Medicine, Vermillion, SD 57069, USA.
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Abdullah A, Eyster KM, Bjordahl T, Xiao P, Zeng E, Wang X. Murine Myocardial Transcriptome Analysis Reveals a Critical Role of COPS8 in the Gene Expression of Cullin-RING Ligase Substrate Receptors and Redox and Vesicle Trafficking Pathways. Front Physiol 2017; 8:594. [PMID: 28861005 PMCID: PMC5562692 DOI: 10.3389/fphys.2017.00594] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 07/31/2017] [Indexed: 02/06/2023] Open
Abstract
Background: The COP9 signalosome (CSN) consisting of 8 unique protein subunits (COPS1 through COPS8) serves as the cullin deneddylase, regulating the catalytic dynamics of cullin RING ligases (CRLs), the largest family of ubiquitin ligases Background: The COP9 signalosome (CSN) consisting of 8 unique protein subunits (COPS1 through COPS8) serves as the cullin deneddylase, regulating the catalytic dynamics of cullin RING ligases (CRLs), the largest family of ubiquitin ligases. Supported primarily by the decrease of substrate receptor (SR) proteins of CRLs in cells deficient of a CSN subunit, CSN-mediated cullin deneddylation is believed to prevent autoubiquitination and self-destruction of the SR in active CRLs. However, it is unclear whether the decrease in SRs is solely due to protein destabilization. Moreover, our prior studies have demonstrated that cardiac specific knockout of Cops8 (Cops8-CKO) impairs autophagosome maturation and causes massive necrosis in cardiomyocytes but the underlying mechanism remains poorly understood. Given that Cops8 is nucleus-enriched and a prior report showed its binding to the promoter of several genes and association of its ablation with decreased mRNA levels of these genes, we sought to determine the dynamic changes of myocardial transcriptome in mice with perinatal Cops8-CKO and to explore their functional implications. Methods and Results: Myocardial transcriptomes of Cops8flox/flox , Cops8flox/+::Myh6-Cre, and Cops8flox/flox::Myh6-Cre littermate mice at postnatal 2 and 3 weeks were analyzed. The data were imported into an in-house analysis pipeline using Bioconductor for quantile normalization and statistical analysis. Differentially expressed genes (DEGs) between groups at each time point or between time points within the group were revealed by t-test. Genes with p < 0.05 after Benjamini and Hochberg false discovery rate correction for multiple hypothesis testing were considered as significant DEGs. We found that (1) the Ingenuity Pathway Analysis (IPA) revealed significant enrichment of DEGs in multiple pathways, especially those responding to oxidative stress, in homozygous Cops8-CKO hearts at both 2 and 3 weeks, corroborating the occurrence of massive cardiomyocyte necrosis at 3 weeks; (2) the decreases in multiple CRL SR proteins were associated with decreased transcript levels; and (3) enrichment of DEGs in the chromatin remodeling pathway and the microtubule motility and vesicle trafficking pathways. Conclusions: Our data are consistent with the notion that Cops8/CSN plays a role in the transcriptional regulation of CRL SRs and in the redox and vesicle trafficking pathways.
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Affiliation(s)
- Ammara Abdullah
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South DakotaVermillion, SD, United States
| | - Kathleen M Eyster
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South DakotaVermillion, SD, United States
| | - Travis Bjordahl
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South DakotaVermillion, SD, United States
| | - Peng Xiao
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South DakotaVermillion, SD, United States
| | - Erliang Zeng
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South DakotaVermillion, SD, United States.,Department of Computer Science and Department of Biology, University of South DakotaVermillion, SD, United States
| | - Xuejun Wang
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South DakotaVermillion, SD, United States
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41
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Zhan L, Chen S, Li K, Liang D, Zhu X, Liu L, Lu Z, Sun W, Xu E. Autophagosome maturation mediated by Rab7 contributes to neuroprotection of hypoxic preconditioning against global cerebral ischemia in rats. Cell Death Dis 2017; 8:e2949. [PMID: 28726776 PMCID: PMC5550874 DOI: 10.1038/cddis.2017.330] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 05/21/2017] [Accepted: 06/05/2017] [Indexed: 12/18/2022]
Abstract
Autophagy disruption leads to neuronal damage in hypoxic–ischemic brain injury. Rab7, a member of the Rab GTPase superfamily, has a unique role in the regulation of autophagy. Hypoxic preconditioning (HPC) provides neuroprotection against transient global cerebral ischemia (tGCI). However, the underlying mechanisms remain poorly understood. Thus, the current study explored the potential molecular mechanism of the neuroprotective effect of HPC by investigating how Rab7 mediates autophagosome (AP) maturation after tGCI in adult rats. We found that HPC attenuated AP accumulation in the hippocampal CA1 region after tGCI via restoration of autophagic flux. We also confirmed that this HPC-induced neuroprotection was not caused by the increase in lysosomes or the improvement of lysosomal function after tGCI. Electron microscopic analysis then revealed an increase in autolysosomes in CA1 neurons of HPC rats. Moreover, the inhibition of autophagosome-lysosome fusion by chloroquine significantly aggravated neuronal death in CA1, indicating that AP maturation contributes to HPC-induced neuroprotection against neuronal injury after tGCI. Furthermore, the activation of Rab7 was found to be involved in the neuroprotective effect of AP maturation after HPC. At last, the knockdown of ultraviolet radiation resistance-associated gene (UVRAG) in vivo disrupted the interaction between Vps16 and Rab7, attenuated the activation of Rab7, interrupted autophagic flux, and ultimately abrogated the HPC-induced neuroprotection against tGCI. Our results indicated that AP maturation was enhanced by the activation of Rab7 via UVRAG-Vps16 interaction, which further demonstrated the potential neuroprotective role of Rab7 in HPC against tGCI-induced neuronal injury in adult rats.
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Affiliation(s)
- Lixuan Zhan
- Institute of Neurosciences and Department of Neurology of The Second Affiliated Hospital of Guangzhou Medical University, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and The Ministry of Education of China, Guangzhou 510260, China
| | - Siyuan Chen
- Institute of Neurosciences and Department of Neurology of The Second Affiliated Hospital of Guangzhou Medical University, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and The Ministry of Education of China, Guangzhou 510260, China
| | - Kongping Li
- Institute of Neurosciences and Department of Neurology of The Second Affiliated Hospital of Guangzhou Medical University, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and The Ministry of Education of China, Guangzhou 510260, China
| | - Donghai Liang
- Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta 30322, Georgia
| | - Xinyong Zhu
- Institute of Neurosciences and Department of Neurology of The Second Affiliated Hospital of Guangzhou Medical University, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and The Ministry of Education of China, Guangzhou 510260, China
| | - Liu Liu
- Institute of Neurosciences and Department of Neurology of The Second Affiliated Hospital of Guangzhou Medical University, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and The Ministry of Education of China, Guangzhou 510260, China
| | - Zhiwei Lu
- Institute of Neurosciences and Department of Neurology of The Second Affiliated Hospital of Guangzhou Medical University, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and The Ministry of Education of China, Guangzhou 510260, China
| | - Weiwen Sun
- Institute of Neurosciences and Department of Neurology of The Second Affiliated Hospital of Guangzhou Medical University, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and The Ministry of Education of China, Guangzhou 510260, China
| | - En Xu
- Institute of Neurosciences and Department of Neurology of The Second Affiliated Hospital of Guangzhou Medical University, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and The Ministry of Education of China, Guangzhou 510260, China
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Wu P, Yuan X, Li F, Zhang J, Zhu W, Wei M, Li J, Wang X. Myocardial Upregulation of Cathepsin D by Ischemic Heart Disease Promotes Autophagic Flux and Protects Against Cardiac Remodeling and Heart Failure. Circ Heart Fail 2017; 10:CIRCHEARTFAILURE.117.004044. [PMID: 28694354 DOI: 10.1161/circheartfailure.117.004044] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 06/07/2017] [Indexed: 11/16/2022]
Abstract
BACKGROUND Lysosomal dysfunction is implicated in human heart failure for which ischemic heart disease is the leading cause. Altered myocardial expression of CTSD (cathepsin D), a major lysosomal protease, was observed in human heart failure, but its pathophysiological significance has not been determined. METHODS AND RESULTS Western blot analyses revealed an increase in the precursor but not the mature form of CTSD in myocardial samples from explanted human failing hearts with ischemic heart disease, which is recapitulated in chronic myocardial infarction produced via coronary artery ligation in Ctsd+/+ but not Ctsd+/- mice. Mice deficient of Ctsd displayed impaired myocardial autophagosome removal, reduced autophagic flux, and restrictive cardiomyopathy. After induction of myocardial infarction, weekly serial echocardiography detected earlier occurrence of left ventricle chamber dilatation, greater decreases in ejection fraction and fractional shortening, and lesser wall thickening throughout the first 4 weeks; pressure-volume relationship analyses at 4 weeks revealed greater decreases in systolic and diastolic functions, stroke work, stroke volume, and cardiac output; greater increases in the ventricular weight to body weight and the lung weight to body weight ratios and larger scar size were also detected in Ctsd+/- mice compared with Ctsd+/+ mice. Significant increases of myocardial autophagic flux detected at 1 and 4 weeks after induction of myocardial infarction in the Ctsd+/+ mice were diminished in the Ctsd+/- mice. CONCLUSIONS Myocardial CTSD upregulation induced by myocardial infarction protects against cardiac remodeling and malfunction, which is at least in part through promoting myocardial autophagic flux.
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Affiliation(s)
- Penglong Wu
- From the Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, China (P.W., M.W., J.L., X.W.); Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion (P.W., X.W.); Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis (X.Y., F.L.); Department of Pathology, University of Alabama at Birmingham (J.Z.); Clinical Research Center and Division of Cardiology, Zhejiang University School of Medicine 2nd Affiliated Hospital, Hangzhou, China (W.Z.); Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou, China (X.W.); and Guangzhou Institute of Oncology, Tumor Hospital, Guangzhou Medical University, China (X.W.)
| | - Xun Yuan
- From the Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, China (P.W., M.W., J.L., X.W.); Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion (P.W., X.W.); Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis (X.Y., F.L.); Department of Pathology, University of Alabama at Birmingham (J.Z.); Clinical Research Center and Division of Cardiology, Zhejiang University School of Medicine 2nd Affiliated Hospital, Hangzhou, China (W.Z.); Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou, China (X.W.); and Guangzhou Institute of Oncology, Tumor Hospital, Guangzhou Medical University, China (X.W.)
| | - Faqian Li
- From the Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, China (P.W., M.W., J.L., X.W.); Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion (P.W., X.W.); Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis (X.Y., F.L.); Department of Pathology, University of Alabama at Birmingham (J.Z.); Clinical Research Center and Division of Cardiology, Zhejiang University School of Medicine 2nd Affiliated Hospital, Hangzhou, China (W.Z.); Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou, China (X.W.); and Guangzhou Institute of Oncology, Tumor Hospital, Guangzhou Medical University, China (X.W.)
| | - Jianhua Zhang
- From the Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, China (P.W., M.W., J.L., X.W.); Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion (P.W., X.W.); Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis (X.Y., F.L.); Department of Pathology, University of Alabama at Birmingham (J.Z.); Clinical Research Center and Division of Cardiology, Zhejiang University School of Medicine 2nd Affiliated Hospital, Hangzhou, China (W.Z.); Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou, China (X.W.); and Guangzhou Institute of Oncology, Tumor Hospital, Guangzhou Medical University, China (X.W.)
| | - Wei Zhu
- From the Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, China (P.W., M.W., J.L., X.W.); Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion (P.W., X.W.); Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis (X.Y., F.L.); Department of Pathology, University of Alabama at Birmingham (J.Z.); Clinical Research Center and Division of Cardiology, Zhejiang University School of Medicine 2nd Affiliated Hospital, Hangzhou, China (W.Z.); Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou, China (X.W.); and Guangzhou Institute of Oncology, Tumor Hospital, Guangzhou Medical University, China (X.W.)
| | - Meng Wei
- From the Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, China (P.W., M.W., J.L., X.W.); Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion (P.W., X.W.); Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis (X.Y., F.L.); Department of Pathology, University of Alabama at Birmingham (J.Z.); Clinical Research Center and Division of Cardiology, Zhejiang University School of Medicine 2nd Affiliated Hospital, Hangzhou, China (W.Z.); Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou, China (X.W.); and Guangzhou Institute of Oncology, Tumor Hospital, Guangzhou Medical University, China (X.W.)
| | - Jingbo Li
- From the Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, China (P.W., M.W., J.L., X.W.); Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion (P.W., X.W.); Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis (X.Y., F.L.); Department of Pathology, University of Alabama at Birmingham (J.Z.); Clinical Research Center and Division of Cardiology, Zhejiang University School of Medicine 2nd Affiliated Hospital, Hangzhou, China (W.Z.); Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou, China (X.W.); and Guangzhou Institute of Oncology, Tumor Hospital, Guangzhou Medical University, China (X.W.).
| | - Xuejun Wang
- From the Department of Cardiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, China (P.W., M.W., J.L., X.W.); Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion (P.W., X.W.); Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis (X.Y., F.L.); Department of Pathology, University of Alabama at Birmingham (J.Z.); Clinical Research Center and Division of Cardiology, Zhejiang University School of Medicine 2nd Affiliated Hospital, Hangzhou, China (W.Z.); Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou, China (X.W.); and Guangzhou Institute of Oncology, Tumor Hospital, Guangzhou Medical University, China (X.W.).
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Wang X, Cui T. Autophagy modulation: a potential therapeutic approach in cardiac hypertrophy. Am J Physiol Heart Circ Physiol 2017; 313:H304-H319. [PMID: 28576834 DOI: 10.1152/ajpheart.00145.2017] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 05/31/2017] [Accepted: 05/31/2017] [Indexed: 12/12/2022]
Abstract
Autophagy is an evolutionarily conserved process used by the cell to degrade cytoplasmic contents for quality control, survival for temporal energy crisis, and catabolism and recycling. Rapidly increasing evidence has revealed an important pathogenic role of altered activity of the autophagosome-lysosome pathway (ALP) in cardiac hypertrophy and heart failure. Although an early study suggested that cardiac autophagy is increased and that this increase is maladaptive to the heart subject to pressure overload, more recent reports have overwhelmingly supported that myocardial ALP insufficiency results from chronic pressure overload and contributes to maladaptive cardiac remodeling and heart failure. This review examines multiple lines of preclinical evidence derived from recent studies regarding the role of autophagic dysfunction in pressure-overloaded hearts, attempts to reconcile the discrepancies, and proposes that resuming or improving ALP flux through coordinated enhancement of both the formation and the removal of autophagosomes would benefit the treatment of cardiac hypertrophy and heart failure resulting from chronic pressure overload.
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Affiliation(s)
- Xuejun Wang
- Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, Vermillion, South Dakota; and
| | - Taixing Cui
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina
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44
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Galgano D, Onnis A, Pappalardo E, Galvagni F, Acuto O, Baldari CT. The T cell IFT20 interactome reveals new players in immune synapse assembly. J Cell Sci 2017; 130:1110-1121. [PMID: 28154159 DOI: 10.1242/jcs.200006] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 01/30/2017] [Indexed: 12/17/2022] Open
Abstract
Sustained signalling at the immune synapse (IS) requires the synaptic delivery of recycling endosome-associated T cell antigen receptors (TCRs). IFT20, a component of the intraflagellar transport system, controls TCR recycling to the IS as a complex with IFT57 and IFT88. Here, we used quantitative mass spectrometry to identify additional interaction partners of IFT20 in Jurkat T cells. In addition to IFT57 and IFT88, the analysis revealed new binding partners, including IFT54 (also known as TRAF3IP1), GMAP-210 (also known as TRIP11), Arp2/3 complex subunit-3 (ARPC3), COP9 signalosome subunit-1 (CSN1, also known as GPS1) and ERGIC-53 (also known as LMAN1). A direct interaction between IFT20 and both IFT54 and GMAP-210 was confirmed in pulldown assays. Confocal imaging of antigen-specific conjugates using T cells depleted of these proteins by RNA interference showed that TCR accumulation and phosphotyrosine signalling at the IS were impaired in the absence of IFT54, ARPC3 or ERGIC-53. Similar to in IFT20-deficient T cells, this defect resulted from a reduced ability of endosomal TCRs to polarize to the IS despite a correct translocation of the centrosome towards the antigen-presenting cell contact. Our data underscore the traffic-related role of an IFT20 complex that includes components of the intracellular trafficking machinery in IS assembly.
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Affiliation(s)
- Donatella Galgano
- Department of Life Sciences, University of Siena, Siena 53100, Italy
| | - Anna Onnis
- Department of Life Sciences, University of Siena, Siena 53100, Italy
| | - Elisa Pappalardo
- Sir William Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, UK
| | - Federico Galvagni
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena 53100, Italy
| | - Oreste Acuto
- Sir William Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, UK
| | - Cosima T Baldari
- Department of Life Sciences, University of Siena, Siena 53100, Italy
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Min JW, Lü L, Freeling JL, Martin DS, Wang H. USP14 inhibitor attenuates cerebral ischemia/reperfusion-induced neuronal injury in mice. J Neurochem 2017; 140:826-833. [PMID: 28029679 DOI: 10.1111/jnc.13941] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 12/01/2016] [Accepted: 12/21/2016] [Indexed: 01/18/2023]
Abstract
Stroke is associated with over-production of misfolded and aggregating proteins. However, it remains largely unclear whether enhanced removal of protein aggregates following ischemic stroke is neuroprotective. Deubiquitinating enzymes (DUBs) are a large group of proteases that regulate protein degradation. The ubiquitin-specific protease 14 (USP14) is a DUB that is associated with the proteasome and negatively regulates proteasome activity. In this study, we examined the effect of 1-[1-(4-fluorophenyl)-2,5-dimethylpyrrol-3-yl]-2-pyrrolidin-1-ylethanone (IU1), a specific small molecule inhibitor of USP14, on mouse focal cerebral ischemic stroke-induced neuronal injury in mice. We found that IU1 treatment attenuated ischemic stroke-caused neuronal injury, which was reflected by increased survival rate, reduced infarct volume, as well as decreased neuronal loss in the IU1-treated mice compared to the control-treated mice. Additionally, IU1 treatment is associated with reduced protein aggregates and enhanced proteasome functionality. These data not only highlight the significance of protein homeostasis in cerebral ischemia/reperfusion-induced neuronal injury but also extend the therapeutic role of DUB inhibitors.
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Affiliation(s)
- Jia-Wei Min
- Division of Basic Biomedical Sciences and Center for Brain and Behavior Research, Sanford School of Medicine, University of South Dakota, Vermillion, South Dakota, USA
| | - Lanhai Lü
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology and Institute of Stomatological Research, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, China.,Department of Oral Immunology and Infectious Diseases, School of Dentistry, University of Louisville, Louisville, Kentucky, USA
| | - Jessica L Freeling
- Division of Basic Biomedical Sciences and Center for Brain and Behavior Research, Sanford School of Medicine, University of South Dakota, Vermillion, South Dakota, USA
| | - Doug S Martin
- Division of Basic Biomedical Sciences and Center for Brain and Behavior Research, Sanford School of Medicine, University of South Dakota, Vermillion, South Dakota, USA
| | - Hongmin Wang
- Division of Basic Biomedical Sciences and Center for Brain and Behavior Research, Sanford School of Medicine, University of South Dakota, Vermillion, South Dakota, USA
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46
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Jeong JH, Yu KS, Bak DH, Lee JH, Lee NS, Jeong YG, Kim DK, Kim JJ, Han SY. Intermittent fasting is neuroprotective in focal cerebral ischemia by minimizing autophagic flux disturbance and inhibiting apoptosis. Exp Ther Med 2016; 12:3021-3028. [PMID: 27882110 DOI: 10.3892/etm.2016.3852] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 08/12/2016] [Indexed: 01/01/2023] Open
Abstract
Previous studies have demonstrated that autophagy induced by caloric restriction (CR) is neuroprotective against cerebral ischemia. However, it has not been determined whether intermittent fasting (IF), a variation of CR, can exert autophagy-related neuroprotection against cerebral ischemia. Therefore, the neuroprotective effect of IF was evaluated over the course of two weeks in a rat model of focal cerebral ischemia, which was induced by middle cerebral artery occlusion and reperfusion (MCAO/R). Specifically, the role of autophagy modulation as a potential underlying mechanism for this phenomenon was investigated. It was demonstrated that IF reduced infarct volume and brain edema, improved neurobehavioral deficits, and rescued neuronal loss after MCAO/R. Furthermore, neuronal apoptosis was decreased by IF in the rat cortex. An increase in the number of autophagosomes (APs) was demonstrated in the cortices of IF-treated rats, using immunofluorescence staining and transmission electron microscopy. Using immunoblots, an IF-induced increase was detected in microtubule-associated protein 1 light chain 3 (LC3)-II, Rab7, and cathepsin D protein levels, which corroborated previous morphological studies. Notably, IF reduced the accumulation of APs and p62, demonstrating that IF attenuated the MCAO/R-induced disturbance of autophagic flux in neurons. The findings of the present study suggest that IF-induced neuroprotection in focal cerebral ischemia is due, at least in part, to the minimization of autophagic flux disturbance and inhibition of apoptosis.
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Affiliation(s)
- Ji Heun Jeong
- Department of Anatomy, College of Medicine, Konyang University, Seo-gu, Daejeon 302-718, Republic of Korea
| | - Kwang Sik Yu
- Department of Anatomy, College of Medicine, Konyang University, Seo-gu, Daejeon 302-718, Republic of Korea
| | - Dong Ho Bak
- Department of Anatomy, College of Medicine, Konyang University, Seo-gu, Daejeon 302-718, Republic of Korea
| | - Je Hun Lee
- Department of Anatomy, College of Medicine, Konyang University, Seo-gu, Daejeon 302-718, Republic of Korea
| | - Nam Seob Lee
- Department of Anatomy, College of Medicine, Konyang University, Seo-gu, Daejeon 302-718, Republic of Korea
| | - Young Gil Jeong
- Department of Anatomy, College of Medicine, Konyang University, Seo-gu, Daejeon 302-718, Republic of Korea
| | - Dong Kwan Kim
- Department of Physiology, College of Medicine, Konyang University, Seo-gu, Daejeon 302-718, Republic of Korea
| | - Jwa-Jin Kim
- Department of Anatomy, Brain Research Institute, College of Medicine, Chungnam National University, Jung-gu, Daejeon 301-747, Republic of Korea; LES Corporation Inc., Yuseong-gu, Daejeon 305-335, Republic of Korea
| | - Seung-Yun Han
- Department of Anatomy, College of Medicine, Konyang University, Seo-gu, Daejeon 302-718, Republic of Korea
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47
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Park KM, Teoh JP, Wang Y, Broskova Z, Bayoumi AS, Tang Y, Su H, Weintraub NL, Kim IM. Carvedilol-responsive microRNAs, miR-199a-3p and -214 protect cardiomyocytes from simulated ischemia-reperfusion injury. Am J Physiol Heart Circ Physiol 2016; 311:H371-83. [PMID: 27288437 PMCID: PMC5005281 DOI: 10.1152/ajpheart.00807.2015] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Accepted: 06/01/2016] [Indexed: 12/24/2022]
Abstract
The nonselective β-adrenergic receptor antagonist (β-blocker) carvedilol has been shown to protect against myocardial injury, but the detailed underlying mechanisms are unclear. We recently reported that carvedilol stimulates the processing of microRNA (miR)-199a-3p and miR-214 in the heart via β-arrestin1-biased β1-adrenergic receptor (β1AR) cardioprotective signaling. Here, we investigate whether these β-arrestin1/β1AR-responsive miRs mediate the beneficial effects of carvedilol against simulated ischemia/reperfusion (sI/R). Using cultured cardiomyocyte cell lines and primary cardiomyocytes, we demonstrate that carvedilol upregulates miR-199a-3p and miR-214 in both ventricular and atrial cardiomyocytes subjected to sI/R. Overexpression of the two miRs in cardiomyocytes mimics the effects of carvedilol to activate p-AKT survival signaling and the expression of a downstream pluripotency marker Sox2 in response to sI/R. Moreover, carvedilol-mediated p-AKT activation is abolished by knockdown of either miR-199a-3p or miR-214. Along with previous studies to directly link the cardioprotective actions of carvedilol to upregulation of p-AKT/stem cell markers, our findings suggest that the protective roles of carvedilol during ischemic injury are in part attributed to activation of these two protective miRs. Loss of function of miR-199a-3p and miR-214 also increases cardiomyocyte apoptosis after sI/R. Mechanistically, we demonstrate that miR-199a-3p and miR-214 repress the predictive or known apoptotic target genes ddit4 and ing4, respectively, in cardiomyocytes. These findings suggest pivotal roles for miR-199a-3p and miR-214 as regulators of cardiomyocyte survival and contributors to the functional benefits of carvedilol therapy.
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Affiliation(s)
- Kyoung-Mi Park
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Jian-Peng Teoh
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Yongchao Wang
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Zuzana Broskova
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Ahmed S Bayoumi
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Yaoliang Tang
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia; Department of Medicine, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Huabo Su
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia; Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Neal L Weintraub
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia; Department of Medicine, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Il-Man Kim
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia; Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta University, Augusta, Georgia
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Santin Y, Sicard P, Vigneron F, Guilbeau-Frugier C, Dutaur M, Lairez O, Couderc B, Manni D, Korolchuk VI, Lezoualc'h F, Parini A, Mialet-Perez J. Oxidative Stress by Monoamine Oxidase-A Impairs Transcription Factor EB Activation and Autophagosome Clearance, Leading to Cardiomyocyte Necrosis and Heart Failure. Antioxid Redox Signal 2016; 25:10-27. [PMID: 26959532 DOI: 10.1089/ars.2015.6522] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
AIMS In heart failure (HF), mitochondrial quality control and autophagy are progressively impaired, but the role of oxidative stress in this process and its underlying mechanism remain to be defined. By degrading norepinephrine and serotonin, the mitochondrial enzyme, monoamine oxidase-A (MAO-A), is a potent source of reactive oxygen species (ROS) in the heart and its activation leads to the persistence of mitochondrial damage. In this study, we analyzed the consequences of ROS generation by MAO-A on the autophagy-lysosome pathway in the heart. RESULTS Cardiomyocyte-driven expression of MAO-A in mice led to mitochondrial fission and translocation of Drp1 and Parkin in the mitochondrial compartment. Ventricles from MAO-A transgenic mice displayed accumulation of LC3-positive autophagosomes, together with p62 and ubiquitylated proteins, indicating impairment of autophagy. In vitro adenoviral delivery of MAO-A in cardiomyocytes and the consequent generation of ROS blocked autophagic flux with accumulation of LC3II, p62, and ubiquitylated proteins, leading to mitochondrial fission and cell necrosis. In addition, MAO-A activation induced accumulation of lysosomal proteins, cathepsin D and Lamp1, reduced lysosomal acidification, and blocked the nuclear translocation of transcription factor-EB (TFEB), a master regulator of autophagy and lysosome biogenesis. Most interestingly, overexpression of TFEB attenuated autophagosome buildup, mitochondrial fission, cardiomyocyte death, and HF associated with MAO-A activation. INNOVATION AND CONCLUSION This study unravels a new link between MAO-dependent H2O2 production and lysosomal dysfunction. Altogether, our findings demonstrate that the MAO-A/H2O2 axis has a negative impact on the elimination and recycling of mitochondria through the autophagy-lysosome pathway, which participates in cardiomyocyte death and HF. Antioxid. Redox Signal. 25, 10-27.
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Affiliation(s)
- Yohan Santin
- 1 INSERM, I2MC, Institut des Maladies Métaboliques et Cardiovasculaires , Toulouse, France .,2 CHU de Toulouse, Institut Claudius Regaud , Université de Toulouse, France
| | - Pierre Sicard
- 1 INSERM, I2MC, Institut des Maladies Métaboliques et Cardiovasculaires , Toulouse, France .,2 CHU de Toulouse, Institut Claudius Regaud , Université de Toulouse, France
| | - François Vigneron
- 1 INSERM, I2MC, Institut des Maladies Métaboliques et Cardiovasculaires , Toulouse, France .,2 CHU de Toulouse, Institut Claudius Regaud , Université de Toulouse, France
| | - Céline Guilbeau-Frugier
- 1 INSERM, I2MC, Institut des Maladies Métaboliques et Cardiovasculaires , Toulouse, France .,2 CHU de Toulouse, Institut Claudius Regaud , Université de Toulouse, France
| | - Marianne Dutaur
- 1 INSERM, I2MC, Institut des Maladies Métaboliques et Cardiovasculaires , Toulouse, France .,2 CHU de Toulouse, Institut Claudius Regaud , Université de Toulouse, France
| | - Olivier Lairez
- 1 INSERM, I2MC, Institut des Maladies Métaboliques et Cardiovasculaires , Toulouse, France .,2 CHU de Toulouse, Institut Claudius Regaud , Université de Toulouse, France
| | - Bettina Couderc
- 2 CHU de Toulouse, Institut Claudius Regaud , Université de Toulouse, France
| | - Diego Manni
- 3 Institute for Cell and Molecular Biosciences and Newcastle University Institute for Ageing, Campus for Ageing and Vitality, Newcastle University , Newcastle upon Tyne, United Kingdom
| | - Viktor I Korolchuk
- 3 Institute for Cell and Molecular Biosciences and Newcastle University Institute for Ageing, Campus for Ageing and Vitality, Newcastle University , Newcastle upon Tyne, United Kingdom
| | - Frank Lezoualc'h
- 1 INSERM, I2MC, Institut des Maladies Métaboliques et Cardiovasculaires , Toulouse, France .,2 CHU de Toulouse, Institut Claudius Regaud , Université de Toulouse, France
| | - Angelo Parini
- 1 INSERM, I2MC, Institut des Maladies Métaboliques et Cardiovasculaires , Toulouse, France .,2 CHU de Toulouse, Institut Claudius Regaud , Université de Toulouse, France
| | - Jeanne Mialet-Perez
- 1 INSERM, I2MC, Institut des Maladies Métaboliques et Cardiovasculaires , Toulouse, France .,2 CHU de Toulouse, Institut Claudius Regaud , Université de Toulouse, France
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Quintana MT, Parry TL, He J, Yates CC, Sidorova TN, Murray KT, Bain JR, Newgard CB, Muehlbauer MJ, Eaton SC, Hishiya A, Takayama S, Willis MS. Cardiomyocyte-Specific Human Bcl2-Associated Anthanogene 3 P209L Expression Induces Mitochondrial Fragmentation, Bcl2-Associated Anthanogene 3 Haploinsufficiency, and Activates p38 Signaling. THE AMERICAN JOURNAL OF PATHOLOGY 2016; 186:1989-2007. [PMID: 27321750 DOI: 10.1016/j.ajpath.2016.03.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 02/20/2016] [Accepted: 03/17/2016] [Indexed: 12/24/2022]
Abstract
The Bcl2-associated anthanogene (BAG) 3 protein is a member of the BAG family of cochaperones, which supports multiple critical cellular processes, including critical structural roles supporting desmin and interactions with heat shock proteins and ubiquitin ligases intimately involved in protein quality control. The missense mutation P209L in exon 3 results in a primarily cardiac phenotype leading to skeletal muscle and cardiac complications. At least 10 other Bag3 mutations have been reported, nine resulting in a dilated cardiomyopathy for which no specific therapy is available. We generated αMHC-human Bag3 P209L transgenic mice and characterized the progressive cardiac phenotype in vivo to investigate its utility in modeling human disease, understand the underlying molecular mechanisms, and identify potential therapeutic targets. We identified a progressive heart failure by echocardiography and Doppler analysis and the presence of pre-amyloid oligomers at 1 year. Paralleling the pathogenesis of neurodegenerative diseases (eg, Parkinson disease), pre-amyloid oligomers-associated alterations in cardiac mitochondrial dynamics, haploinsufficiency of wild-type BAG3, and activation of p38 signaling were identified. Unexpectedly, increased numbers of activated cardiac fibroblasts were identified in Bag3 P209L Tg+ hearts without increased fibrosis. Together, these findings point to a previously undescribed therapeutic target that may have application to mutation-induced myofibrillar myopathies as well as other common causes of heart failure that commonly harbor misfolded proteins.
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Affiliation(s)
- Megan T Quintana
- Department of Surgery, University of North Carolina, Chapel Hill, North Carolina
| | - Traci L Parry
- McAllister Heart Institute, University of North Carolina, Chapel Hill, North Carolina
| | - Jun He
- General Hospital of Ningxia Medical University, Yinchuan, Ningxia, People's Republic of China
| | - Cecelia C Yates
- Department of Health Promotions and Development, School of Nursing, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Tatiana N Sidorova
- Departments of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Katherine T Murray
- Departments of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - James R Bain
- Sarah W. Stedman Nutrition and Metabolism Center, Duke Molecular Physiology Institute, Duke University Medical Center, Durham, North Carolina; Division of Endocrinology, Metabolism, and Nutrition, Department of Medicine, Duke University Medical Center, Durham, North Carolina
| | - Christopher B Newgard
- Sarah W. Stedman Nutrition and Metabolism Center, Duke Molecular Physiology Institute, Duke University Medical Center, Durham, North Carolina; Division of Endocrinology, Metabolism, and Nutrition, Department of Medicine, Duke University Medical Center, Durham, North Carolina
| | - Michael J Muehlbauer
- Sarah W. Stedman Nutrition and Metabolism Center, Duke Molecular Physiology Institute, Duke University Medical Center, Durham, North Carolina
| | - Samuel C Eaton
- Department of Pharmacology, University of North Carolina, Chapel Hill, North Carolina
| | | | - Shin Takayama
- Department of Pathology, Boston University, Boston, Massachusetts
| | - Monte S Willis
- McAllister Heart Institute, University of North Carolina, Chapel Hill, North Carolina; Department of Pharmacology, University of North Carolina, Chapel Hill, North Carolina; Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, North Carolina.
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Cui D, Xiong X, Zhao Y. Cullin-RING ligases in regulation of autophagy. Cell Div 2016; 11:8. [PMID: 27293474 PMCID: PMC4902950 DOI: 10.1186/s13008-016-0022-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Accepted: 05/27/2016] [Indexed: 12/25/2022] Open
Abstract
Cullin-RING ligases (CRLs), the largest E3 ubiquitin ligase family, promote ubiquitination and degradation of various cellular key regulators involved in a broad array of physiological and pathological processes, including cell cycle progression, signal transduction, transcription, cardiomyopathy, and tumorigenesis. Autophagy, an intracellular catabolic reaction that delivers cytoplasmic components to lysosomes for degradation, is crucial for cellular metabolism and homeostasis. The dysfunction of autophagy has been proved to associate with a variety of human diseases. Recent evidences revealed the emerging roles of CRLs in the regulation of autophagy. In this review, we will focus mainly on recent advances in our understandings of the regulation of autophagy by CRLs and the cross-talk between CRLs and autophagy, two degradation systems. We will also discuss the pathogenesis of human diseases associated with the dysregulation of CRLs and autophagy. Finally, we will discuss current efforts and future perspectives on basic and translational research on CRLs and autophagy.
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Affiliation(s)
- Danrui Cui
- Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health, the First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qing-Chun Road, Hangzhou, Zhejiang 310003 People's Republic of China ; Institute of Translational Medicine, Zhejiang University School of Medicine, 268 Kai-Xuan Road, Hangzhou, Zhejiang 310029 People's Republic of China
| | - Xiufang Xiong
- Institute of Translational Medicine, Zhejiang University School of Medicine, 268 Kai-Xuan Road, Hangzhou, Zhejiang 310029 People's Republic of China
| | - Yongchao Zhao
- Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health, the First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qing-Chun Road, Hangzhou, Zhejiang 310003 People's Republic of China ; Institute of Translational Medicine, Zhejiang University School of Medicine, 268 Kai-Xuan Road, Hangzhou, Zhejiang 310029 People's Republic of China
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