1
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Young MJ, Wang SA, Chen YC, Liu CY, Hsu KC, Tang SW, Tseng YL, Wang YC, Lin SM, Hung JJ. USP24-i-101 targeting of USP24 activates autophagy to inhibit drug resistance acquired during cancer therapy. Cell Death Differ 2024; 31:574-591. [PMID: 38491202 PMCID: PMC11093971 DOI: 10.1038/s41418-024-01277-7] [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: 05/18/2023] [Revised: 03/04/2024] [Accepted: 03/06/2024] [Indexed: 03/18/2024] Open
Abstract
Drug resistance in cancer therapy is the major reason for poor prognosis. Addressing this clinically unmet issue is important and urgent. In this study, we found that targeting USP24 by the specific USP24 inhibitors, USP24-i and its analogues, dramatically activated autophagy in the interphase and mitotic periods of lung cancer cells by inhibiting E2F4 and TRAF6, respectively. USP24 functional knockout, USP24C1695A, or targeting USP24 by USP24-i-101 inhibited drug resistance and activated autophagy in gefitinib-induced drug-resistant mice with doxycycline-induced EGFRL858R lung cancer, but this effect was abolished after inhibition of autophagy, indicating that targeting USP24-mediated induction of autophagy is required for inhibition of drug resistance. Genomic instability and PD-L1 levels were increased in drug resistant lung cancer cells and were inhibited by USP24-i-101 treatment or knockdown of USP24. In addition, inhibition of autophagy by bafilomycin-A1 significantly abolished the effect of USP24-i-101 on maintaining genomic integrity, decreasing PD-L1 and inhibiting drug resistance acquired in chemotherapy or targeted therapy. In summary, an increase in the expression of USP24 in cancer cells is beneficial for the induction of drug resistance and targeting USP24 by USP24-i-101 optimized from USP24-i inhibits drug resistance acquired during cancer therapy by increasing PD-L1 protein degradation and genomic stability in an autophagy induction-dependent manner.
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Affiliation(s)
- Ming-Jer Young
- Department of Biotechnology and Bioindustry Sciences, National Cheng Kung University, Tainan, Taiwan
| | - Shao-An Wang
- School of Respiratory Therapy, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yung-Ching Chen
- Department of Biotechnology and Bioindustry Sciences, National Cheng Kung University, Tainan, Taiwan
| | - Chia-Yu Liu
- Department of Biotechnology and Bioindustry Sciences, National Cheng Kung University, Tainan, Taiwan
| | - Kai-Cheng Hsu
- Graduate Institute of Cancer Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - Sin-Wei Tang
- National Tainan First Senior High School, Tainan, Taiwan
| | - Yau-Lin Tseng
- Division of Thoracic Surgery, Department of Surgery, College of Medicine National Cheng Kung University, Tainan, Taiwan
| | - Yi-Ching Wang
- Institute of Pharmacology, National Cheng Kung University, Tainan, Taiwan
| | - Shih-Min Lin
- Department of Biotechnology and Bioindustry Sciences, National Cheng Kung University, Tainan, Taiwan
| | - Jan-Jong Hung
- Department of Biotechnology and Bioindustry Sciences, National Cheng Kung University, Tainan, Taiwan.
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2
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Kinger S, Jagtap YA, Kumar P, Choudhary A, Prasad A, Prajapati VK, Kumar A, Mehta G, Mishra A. Proteostasis in neurodegenerative diseases. Adv Clin Chem 2024; 121:270-333. [PMID: 38797543 DOI: 10.1016/bs.acc.2024.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Proteostasis is essential for normal function of proteins and vital for cellular health and survival. Proteostasis encompasses all stages in the "life" of a protein, that is, from translation to functional performance and, ultimately, to degradation. Proteins need native conformations for function and in the presence of multiple types of stress, their misfolding and aggregation can occur. A coordinated network of proteins is at the core of proteostasis in cells. Among these, chaperones are required for maintaining the integrity of protein conformations by preventing misfolding and aggregation and guide those with abnormal conformation to degradation. The ubiquitin-proteasome system (UPS) and autophagy are major cellular pathways for degrading proteins. Although failure or decreased functioning of components of this network can lead to proteotoxicity and disease, like neuron degenerative diseases, underlying factors are not completely understood. Accumulating misfolded and aggregated proteins are considered major pathomechanisms of neurodegeneration. In this chapter, we have described the components of three major branches required for proteostasis-chaperones, UPS and autophagy, the mechanistic basis of their function, and their potential for protection against various neurodegenerative conditions, like Alzheimer's, Parkinson's, and Huntington's disease. The modulation of various proteostasis network proteins, like chaperones, E3 ubiquitin ligases, proteasome, and autophagy-associated proteins as therapeutic targets by small molecules as well as new and unconventional approaches, shows promise.
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Affiliation(s)
- Sumit Kinger
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur, Rajasthan, India
| | - Yuvraj Anandrao Jagtap
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur, Rajasthan, India
| | - Prashant Kumar
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur, Rajasthan, India
| | - Akash Choudhary
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur, Rajasthan, India
| | - Amit Prasad
- School of Biosciences and Bioengineering, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh, India
| | - Vijay Kumar Prajapati
- Department of Biochemistry, University of Delhi South Campus, Dhaula Kuan, New Delhi, India
| | - Amit Kumar
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Simrol, Indore, Madhya Pradesh, India
| | - Gunjan Mehta
- Department of Biotechnology, Indian Institute of Technology Hyderabad, Telangana, India
| | - Amit Mishra
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur, Rajasthan, India.
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3
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Liang XW, Wang SZ, Liu B, Chen JC, Cao Z, Chu FR, Lin X, Liu H, Wu JC. A review of deubiquitinases and thier roles in tumorigenesis and development. Front Bioeng Biotechnol 2023; 11:1204472. [PMID: 37251574 PMCID: PMC10213685 DOI: 10.3389/fbioe.2023.1204472] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 05/03/2023] [Indexed: 05/31/2023] Open
Abstract
Ubiquitin is a small protein that can be added onto target protein for inducing target degradation, thereby modulating the activity and stability of protein. Relatively, deubiquitinases (DUBs), a class catalase that can remove ubiquitin from substrate protein, provide a positive regulation of the protein amount at transcription level, post-translational modification, protein interaction, etc. The reversible and dynamic ubiquitination-deubiquitination process plays an essential role in maintaining protein homeostasis, which is critical to almost all the biological processes. Therefore, the metabolic dysregulation of deubiquitinases often lead to serious consequences, including the growth and metastasis of tumors. Accordingly, deubiquitinases can be served as key drug targets for the treatment of tumors. The small molecule inhibitors targeting deubiquitinases has become one of the hot spots of anti-tumor drug research areas. This review concentrated on the function and mechanism of deubiquitinase system in the proliferation, apoptosis, metastasis and autophagy of tumor cells. The research status of small molecule inhibitors of specific deubiquitinases in tumor treatment is introduced, aiming to provide reference for the development of clinical targeted drugs.
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Affiliation(s)
- Xian-Wen Liang
- Department of Hepatobiliary and Pancreatic Surgery, Hainan General Hospital (Hainan Affiliated Hospital of Hainan Medical University), Haikou, China
| | - Sheng-Zhong Wang
- Department of Gastrointestinal Surgery, Central South University Xiangya School of Medicine Affiliated Haikou Hospital, Haikou, China
| | - Bing Liu
- Department of Gastrointestinal Surgery, Central South University Xiangya School of Medicine Affiliated Haikou Hospital, Haikou, China
| | - Jia-Cheng Chen
- Department of Hepatobiliary and Pancreatic Surgery, Hainan General Hospital (Hainan Affiliated Hospital of Hainan Medical University), Haikou, China
| | - Zhi Cao
- Department of Hepatobiliary and Pancreatic Surgery, Hainan General Hospital (Hainan Affiliated Hospital of Hainan Medical University), Haikou, China
| | - Feng-Ran Chu
- Department of Hepatobiliary and Pancreatic Surgery, Hainan General Hospital (Hainan Affiliated Hospital of Hainan Medical University), Haikou, China
| | - Xiong Lin
- Department of Hepatobiliary and Pancreatic Surgery, Hainan General Hospital (Hainan Affiliated Hospital of Hainan Medical University), Haikou, China
| | - Hui Liu
- Department of Gastrointestinal Surgery, Central South University Xiangya School of Medicine Affiliated Haikou Hospital, Haikou, China
| | - Jin-Cai Wu
- Department of Hepatobiliary and Pancreatic Surgery, Hainan General Hospital (Hainan Affiliated Hospital of Hainan Medical University), Haikou, China
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4
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Qin C, Lu Y, Bai L, Wang K. The molecular regulation of autophagy in antimicrobial immunity. J Mol Cell Biol 2022; 14:6547771. [PMID: 35278083 PMCID: PMC9335221 DOI: 10.1093/jmcb/mjac015] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 12/05/2021] [Accepted: 12/07/2021] [Indexed: 11/25/2022] Open
Abstract
Autophagy is a catabolic process that can degrade worn-out organelles and invading pathogens. The activation of autophagy regulates innate and adaptive immunity, playing a key role in the response to microbial invasion. Microbial infection may cause different consequences such as the elimination of invaders through autophagy or xenophagy, host cell death, and symbiotic relationships. Pathogens adapt to the autophagy mechanism and further relieve intracellular stress, which is conducive to host cell survival and microbial growth. The regulation of autophagy forms a complex network through which host immunity is modulated, resulting in a variety of pathophysiological manifestations. Modification of the autophagic pathway is an essential target for the development of antimicrobial drugs.
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Affiliation(s)
- Chuan Qin
- Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences & Comparative Medical Center, Peking Union Medical College, Beijing 100021, China
| | - Yalan Lu
- Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences & Comparative Medical Center, Peking Union Medical College, Beijing 100021, China
| | - Lin Bai
- Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences & Comparative Medical Center, Peking Union Medical College, Beijing 100021, China
| | - Kewei Wang
- Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences & Comparative Medical Center, Peking Union Medical College, Beijing 100021, China
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5
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Park GH, Park JH, Chung KC. Precise control of mitophagy through ubiquitin proteasome system and deubiquitin proteases and their dysfunction in Parkinson's disease. BMB Rep 2021. [PMID: 34674795 PMCID: PMC8728543 DOI: 10.5483/bmbrep.2021.54.12.107] [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] [Indexed: 12/11/2022] Open
Abstract
Parkinson’s disease (PD) is one of the most common neurodegenerative diseases in the elderly population and is caused by the loss of dopaminergic neurons. PD has been predominantly attributed to mitochondrial dysfunction. The structural alteration of α-synuclein triggers toxic oligomer formation in the neurons, which greatly contributes to PD. In this article, we discuss the role of several familial PD-related proteins, such as α-synuclein, DJ-1, LRRK2, PINK1, and parkin in mitophagy, which entails a selective degradation of mitochondria via autophagy. Defective changes in mitochondrial dynamics and their biochemical and functional interaction induce the formation of toxic α-synuclein-containing protein aggregates in PD. In addition, these gene products play an essential role in ubiquitin proteasome system (UPS)-mediated proteolysis as well as mitophagy. Interestingly, a few deubiquitinating enzymes (DUBs) additionally modulate these two pathways negatively or positively. Based on these findings, we summarize the close relationship between several DUBs and the precise modulation of mitophagy. For example, the USP8, USP10, and USP15, among many DUBs are reported to specifically regulate the K48- or K63-linked de-ubiquitination reactions of several target proteins associated with the mitophagic process, in turn upregulating the mitophagy and protecting neuronal cells from α-synuclein-derived toxicity. In contrast, USP30 inhibits mitophagy by opposing parkin-mediated ubiquitination of target proteins. Furthermore, the association between these changes and PD pathogenesis will be discussed. Taken together, although the functional roles of several PD-related genes have yet to be fully understood, they are substantially associated with mitochondrial quality control as well as UPS. Therefore, a better understanding of their relationship provides valuable therapeutic clues for appropriate management strategies.
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Affiliation(s)
- Ga Hyun Park
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Korea
| | - Joon Hyung Park
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Korea
| | - Kwang Chul Chung
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Korea
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6
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Qu J, Lin Z. Autophagy Regulation by Crosstalk between miRNAs and Ubiquitination System. Int J Mol Sci 2021; 22:ijms222111912. [PMID: 34769343 PMCID: PMC8585084 DOI: 10.3390/ijms222111912] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 10/27/2021] [Accepted: 11/01/2021] [Indexed: 12/12/2022] Open
Abstract
MicroRNAs (miRNAs) are non-coding single-stranded RNA molecules encoded by endogenous genes with ~22 nucleotides which are involved in the regulation of post-transcriptional gene expression. Ubiquitination and deubiquitination are common post-translational modifications in eukaryotic cells and important pathways in regulating protein degradation and signal transduction, in which E3 ubiquitin ligases and deubiquitinases (DUBs) play a decisive role. MiRNA and ubiquitination are involved in the regulation of most biological processes, including autophagy. Furthermore, in recent years, the direct interaction between miRNA and E3 ubiquitin ligases or deubiquitinases has attracted much attention, and the cross-talk between miRNA and ubiquitination system has been proved to play key regulatory roles in a variety of diseases. In this review, we summarized the advances in autophagy regulation by crosstalk between miRNA and E3 ubiquitin ligases or deubiquitinases.
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7
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Autophagy: A Novel Horizon for Hair Cell Protection. Neural Plast 2021; 2021:5511010. [PMID: 34306061 PMCID: PMC8263289 DOI: 10.1155/2021/5511010] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 06/21/2021] [Indexed: 12/20/2022] Open
Abstract
As a general sensory disorder, hearing loss was a major concern worldwide. Autophagy is a common cellular reaction to stress that degrades cytoplasmic waste through the lysosome pathway. Autophagy not only plays major roles in maintaining intracellular homeostasis but is also involved in the development and pathogenesis of many diseases. In the auditory system, several studies revealed the link between autophagy and hearing protection. In this review, we aimed to establish the correlation between autophagy and hair cells (HCs) from the aspects of ototoxic drugs, aging, and acoustic trauma and discussed whether autophagy could serve as a potential measure in the protection of HCs.
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8
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Fas/FasL mediates NF-κBp65/PUMA-modulated hepatocytes apoptosis via autophagy to drive liver fibrosis. Cell Death Dis 2021; 12:474. [PMID: 33980818 PMCID: PMC8115181 DOI: 10.1038/s41419-021-03749-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 04/15/2021] [Accepted: 04/19/2021] [Indexed: 12/30/2022]
Abstract
Fas/Fas ligand (FasL)-mediated cell apoptosis involves a variety of physiological and pathological processes including chronic hepatic diseases, and hepatocytes apoptosis contributes to the development of liver fibrosis following various causes. However, the mechanism of the Fas/FasL signaling and hepatocytes apoptosis in liver fibrogenesis remains unclear. The Fas/FasL signaling and hepatocytes apoptosis in liver samples from both human sections and mouse models were investigated. NF-κBp65 wild-type mice (p65f/f), hepatocytes specific NF-κBp65 deletion mice (p65Δhepa), p53-upregulated modulator of apoptosis (PUMA) wild-type (PUMA-WT) and PUMA knockout (PUMA-KO) littermate models, and primary hepatic stellate cells (HSCs) were also used. The mechanism underlying Fas/FasL-regulated hepatocytes apoptosis to drive HSCs activation in fibrosis was further analyzed. We found Fas/FasL promoted PUMA-mediated hepatocytes apoptosis via regulating autophagy signaling and NF-κBp65 phosphorylation, while inhibition of autophagy or PUMA deficiency attenuated Fas/FasL-modulated hepatocytes apoptosis and liver fibrosis. Furthermore, NF-κBp65 in hepatocytes repressed PUMA-mediated hepatocytes apoptosis via regulating the Bcl-2 family, while NF-κBp65 deficiency in hepatocytes promoted PUMA-mediated hepatocytes apoptosis and enhanced apoptosis-linked inflammatory response, which contributed to the activation of HSCs and liver fibrogenesis. These results suggest that Fas/FasL contributes to NF-κBp65/PUMA-modulated hepatocytes apoptosis via autophagy to enhance liver fibrogenesis, and this network could be a potential therapeutic target for liver fibrosis.
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9
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Liu X, Moussa C. Regulatory Role of Ubiquitin Specific Protease-13 (USP13) in Misfolded Protein Clearance in Neurodegenerative Diseases. Neuroscience 2021; 460:161-166. [PMID: 33577955 DOI: 10.1016/j.neuroscience.2021.02.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 02/02/2021] [Accepted: 02/03/2021] [Indexed: 12/14/2022]
Abstract
Ubiquitin Specific Protease (USP)-13 is a de-ubiquitinase member of the cysteine-dependent protease superfamily that cleaves ubiquitin off protein substrates to reverse ubiquitin-mediated protein degradation. Several findings implicate USPs in neurodegeneration. Ubiquitin targets proteins to major degradation pathways, including the proteasome and the lysosome. In melanoma cells, USP13 regulates the degradation of several proteins primarily via ubiquitination and de-ubiquitination. However, the significance of USP13 in regulating protein clearance in neurodegeneration is largely unknown. This mini-review summarizes the most recent evidence pertaining to the role of USP13 in protein clearance via autophagy and the proteasome in neurodegenerative diseases.
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Affiliation(s)
- Xiaoguang Liu
- Translational Neurotherapeutics Program, Laboratory for Dementia and Parkinsonism, Department of Neurology, Georgetown University Medical Center, Building D, Room 265, 4000 Reservoir Road, NW, Washington DC 20057, USA.
| | - Charbel Moussa
- Translational Neurotherapeutics Program, Laboratory for Dementia and Parkinsonism, Department of Neurology, Georgetown University Medical Center, Building D, Room 265, 4000 Reservoir Road, NW, Washington DC 20057, USA.
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10
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The function and regulation of OTU deubiquitinases. Front Med 2019; 14:542-563. [PMID: 31884527 DOI: 10.1007/s11684-019-0734-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Accepted: 10/31/2019] [Indexed: 12/19/2022]
Abstract
Post-translational modification of cellular proteins by ubiquitin regulates numerous cellular processes, including cell division, immune responses, and apoptosis. Ubiquitin-mediated control over these processes can be reversed by deubiquitinases (DUBs), which remove ubiquitin from target proteins and depolymerize polyubiquitin chains. Recently, much progress has been made in the DUBs. In humans, the ovarian tumor protease (OTU) subfamily of DUBs includes 16 members, most of which mediate cell signaling cascades. These OTUs show great variation in structure and function, which display a series of mechanistic features. In this review, we provide a comprehensive analysis of current progress in character, structure and function of OTUs, such as the substrate specificity and catalytic activity regulation. Then we discuss the relationship between some diseases and OTUs. Finally, we summarize the structure of viral OTUs and their function in immune escape and viral survival. Despite the challenges, OTUs might provide new therapeutic targets, due to their involvement in key regulatory processes.
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11
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Deubiquitinating Enzymes: A Critical Regulator of Mitosis. Int J Mol Sci 2019; 20:ijms20235997. [PMID: 31795161 PMCID: PMC6929034 DOI: 10.3390/ijms20235997] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 11/25/2019] [Accepted: 11/25/2019] [Indexed: 12/20/2022] Open
Abstract
Mitosis is a complex and dynamic process that is tightly regulated by a large number of mitotic proteins. Dysregulation of these proteins can generate daughter cells that exhibit genomic instability and aneuploidy, and such cells can transform into tumorigenic cells. Thus, it is important for faithful mitotic progression to regulate mitotic proteins at specific locations in the cells at a given time in each phase of mitosis. Ubiquitin-dependent modifications play critical roles in this process by regulating the degradation, translocation, or signal transduction of mitotic proteins. Here, we review how ubiquitination and deubiquitination regulate the progression of mitosis. In addition, we summarize the substrates and roles of some deubiquitinating enzymes (DUBs) crucial for mitosis and describe how they contribute error correction during mitosis and control the transition between the mitotic phases.
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12
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Feng Y, Xu F, Wang SM, Wu SX, Zhang XH, Gao YX, Li YL, Zhong DB, Yin JZ, Feng YM. Melatonin attenuates nicotine-induced autophagy and neurological changes by decreasing the production of reactive oxygen species. Int J Neurosci 2019; 130:391-397. [PMID: 31721620 DOI: 10.1080/00207454.2019.1692833] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Purpose: The aim of this study was to explore the mechanism of neurological changes underlying the toxicity of nicotine.Materials and methods: Rat pheochromocytoma 12 (PC12) cells and human neuroglia (HM) cells were used. The ROS levels of the cells were detected by the FACScan. Autophagy flux was monitored by a tandem monomeric RFP-GFP-tagged LC3 lentivirus. The autophagic proteins LC3, SQSTM1/p62 and Beclin1 were detected by western blot assay. In order to evaluate the effects of nicotine and melatonin on the morphological changes of neurons, primary cortical neurons were obtained and immunocytochemistry of TUBB3 tubulin were conducted.Results: Nicotine increased the levels of reactive oxygen species (ROS) in PC12 and HM cells in a concentration-dependent manner. Microscopy showed increased autophagic flux in nicotine-treated PC12 cells. Subsequent western blotting results showed that nicotine induced increase in the levels of LC3B-II and Beclin1, and decreased SQSTM1/p62 in a concentration-dependent manner. Finally, nicotine treatment reduced the length of TUBB3-positive axons and dendrites. Melatonin, a mitochondrially targeted antioxidant, reduced the ROS level, and blocked autophagy activation and the morphologic structural changes induced by nicotine.Conclusions: Our results suggested that the role of nicotine in neuronal toxicity maybe through the induction of ROS and the subsequent activation of autophagy. These effects could be restored by melatonin.
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Affiliation(s)
- Yue Feng
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
| | - Fang Xu
- Research Institute of Nutrition and Food Science, Kunming Medical University, Kunming, China.,Yunnan Key Laboratory of Nutrition and Food Safety, Kunming Medical University, Kunming, China
| | - Song-Mei Wang
- Research Institute of Nutrition and Food Science, Kunming Medical University, Kunming, China.,Yunnan Key Laboratory of Nutrition and Food Safety, Kunming Medical University, Kunming, China
| | - Shao-Xiong Wu
- Research Institute of Nutrition and Food Science, Kunming Medical University, Kunming, China.,Yunnan Key Laboratory of Nutrition and Food Safety, Kunming Medical University, Kunming, China
| | - Xue-Hui Zhang
- Research Institute of Nutrition and Food Science, Kunming Medical University, Kunming, China.,Yunnan Key Laboratory of Nutrition and Food Safety, Kunming Medical University, Kunming, China
| | - Yan-Xiang Gao
- Research Institute of Nutrition and Food Science, Kunming Medical University, Kunming, China
| | - Ya-Ling Li
- Department of Gastroenterology, Yunnan First People's Hospital, Kunming, China
| | - Du-Bo Zhong
- Yunnan Yunce Quality Testing Co., Ltd, Kunming, China
| | - Jian-Zhong Yin
- Research Institute of Nutrition and Food Science, Kunming Medical University, Kunming, China.,Yunnan Key Laboratory of Nutrition and Food Safety, Kunming Medical University, Kunming, China
| | - Yue-Mei Feng
- Research Institute of Nutrition and Food Science, Kunming Medical University, Kunming, China.,Yunnan Key Laboratory of Nutrition and Food Safety, Kunming Medical University, Kunming, China
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13
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Boutouja F, Stiehm CM, Mastalski T, Brinkmeier R, Reidick C, El Magraoui F, Platta HW. Vps10-mediated targeting of Pep4 determines the activity of the vacuole in a substrate-dependent manner. Sci Rep 2019; 9:10557. [PMID: 31332264 PMCID: PMC6646403 DOI: 10.1038/s41598-019-47184-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 07/12/2019] [Indexed: 12/21/2022] Open
Abstract
The vacuole is the hydrolytic compartment of yeast cells and has a similar function as the lysosome of higher eukaryotes in detoxification and recycling of macromolecules. We analysed the contribution of single vacuolar enzymes to pexophagy and identified the phospholipase Atg15, the V-ATPase factor Vma2 and the serine-protease Prb1 along with the already known aspartyl-protease Pep4 (Proteinase A) to be required for this pathway. We also analysed the trafficking receptor Vps10, which is required for an efficient vacuolar targeting of the precursor form of Pep4. Here we demonstrate a novel context-dependent role of Vps10 in autophagy. We show that reduced maturation of Pep4 in a VPS10-deletion strain affects the proteolytic activity of the vacuole depending on the type and amount of substrate. The VPS10-deletion has no effect on the degradation of the cytosolic protein Pgk1 via bulk autophagy or on the degradation of ribosomes via ribophagy. In contrast, the degradation of an excess of peroxisomes via pexophagy as well as mitochondria via mitophagy was significantly hampered in a VPS10-deletion strain and correlated with a decreased maturation level of Pep4. The results show that Vps10-mediated targeting of Pep4 limits the proteolytic capacity of the vacuole in a substrate-dependent manner.
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Affiliation(s)
- Fahd Boutouja
- Biochemie Intrazellulärer Transportprozesse, Ruhr-Universität Bochum, 44801, Bochum, Germany
| | - Christian M Stiehm
- Biochemie Intrazellulärer Transportprozesse, Ruhr-Universität Bochum, 44801, Bochum, Germany
| | - Thomas Mastalski
- Biochemie Intrazellulärer Transportprozesse, Ruhr-Universität Bochum, 44801, Bochum, Germany
| | - Rebecca Brinkmeier
- Biochemie Intrazellulärer Transportprozesse, Ruhr-Universität Bochum, 44801, Bochum, Germany
| | - Christina Reidick
- Biochemie Intrazellulärer Transportprozesse, Ruhr-Universität Bochum, 44801, Bochum, Germany
| | - Fouzi El Magraoui
- Biomedizinische Forschung, Leibniz-Institute for Analytical Sciences (ISAS-e.V.), 44139, Dortmund, Germany
| | - Harald W Platta
- Biochemie Intrazellulärer Transportprozesse, Ruhr-Universität Bochum, 44801, Bochum, Germany.
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14
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Vac8 Controls Vacuolar Membrane Dynamics during Different Autophagy Pathways in Saccharomyces cerevisiae. Cells 2019; 8:cells8070661. [PMID: 31262095 PMCID: PMC6678646 DOI: 10.3390/cells8070661] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 06/21/2019] [Accepted: 06/28/2019] [Indexed: 01/08/2023] Open
Abstract
The yeast vacuole is a vital organelle, which is required for the degradation of aberrant intracellular or extracellular substrates and the recycling of the resulting nutrients as newly available building blocks for the cellular metabolism. Like the plant vacuole or the mammalian lysosome, the yeast vacuole is the destination of biosynthetic trafficking pathways that transport the vacuolar enzymes required for its functions. Moreover, substrates destined for degradation, like extracellular endocytosed cargoes that are transported by endosomes/multivesicular bodies as well as intracellular substrates that are transported via different forms of autophagosomes, have the vacuole as destination. We found that non-selective bulk autophagy of cytosolic proteins as well as the selective autophagic degradation of peroxisomes (pexophagy) and ribosomes (ribophagy) was dependent on the armadillo repeat protein Vac8 in Saccharomyces cerevisiae. Moreover, we showed that pexophagy and ribophagy depended on the palmitoylation of Vac8. In contrast, we described that Vac8 was not involved in the acidification of the vacuole nor in the targeting and maturation of certain biosynthetic cargoes, like the aspartyl-protease Pep4 (PrA) and the carboxy-peptidase Y (CPY), indicating a role of Vac8 in the uptake of selected cargoes. In addition, we found that the hallmark phenotype of the vac8Δ strain, namely the characteristic appearance of fragmented and clustered vacuoles, depended on the growth conditions. This fusion defect observed in standard glucose medium can be complemented by the replacement with oleic acid or glycerol medium. This complementation of vacuolar morphology also partially restores the degradation of peroxisomes. In summary, we found that Vac8 controlled vacuolar morphology and activity in a context- and cargo-dependent manner.
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15
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Liu X, Hebron M, Shi W, Lonskaya I, Moussa CEH. Ubiquitin specific protease-13 independently regulates parkin ubiquitination and alpha-synuclein clearance in alpha-synucleinopathies. Hum Mol Genet 2019; 28:548-560. [PMID: 30329047 DOI: 10.1093/hmg/ddy365] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 10/09/2018] [Indexed: 12/22/2022] Open
Abstract
Ubiquitin specific proteases (USPs) are de-ubiquitinases (DUBs) that control protein ubiquitination cycle. The role of DUBs is poorly understood in neurodegenerative diseases. We found that USP13 is overexpressed in post-mortem Parkinson's disease (PD) brains. We investigated whether changes in USP13 levels can affect two molecules, parkin and alpha-synuclein, that are implicated in PD pathogenesis. Parkin is an E3 ubiquitin ligase that is regulated by ubiquitination and targets certain proteins for degradation, and alpha-synuclein may be ubiquitinated and recycled in the normal brain. We found that USP13 independently regulates parkin and alpha-synuclein ubiquitination in models of alpha-synucleinopathies. USP13 shRNA knockdown increases alpha-synuclein ubiquitination and clearance, in a parkin-independent manner. Furthermore, USP13 overexpression counteracts the effects of a tyrosine kinase inhibitor, Nilotinib, while USP13 knockdown facilitates Nilotinib effects on alpha-synculein clearance, suggesting that alpha-synuclein ubiquitnation is important for its clearance. These studies provide novel evidence of USP13 effects on parkin and alpha-synuclein metabolism and suggest that USP13 is a potential therapeutic target in the alpha-synucleinopathies.
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Affiliation(s)
- Xiaoguang Liu
- Department of Neurology, Laboratory for Dementia and Parkinsonism, Translational Neurotherapeutics Program, National Parkinson's Foundation Center of Excellence, Lewy Body Dementia Research Center of Excellence, Georgetown University Medical Center, N.W. Washington D.C., USA
| | - Michaeline Hebron
- Department of Neurology, Laboratory for Dementia and Parkinsonism, Translational Neurotherapeutics Program, National Parkinson's Foundation Center of Excellence, Lewy Body Dementia Research Center of Excellence, Georgetown University Medical Center, N.W. Washington D.C., USA
| | - Wangke Shi
- Department of Neurology, Laboratory for Dementia and Parkinsonism, Translational Neurotherapeutics Program, National Parkinson's Foundation Center of Excellence, Lewy Body Dementia Research Center of Excellence, Georgetown University Medical Center, N.W. Washington D.C., USA
| | - Irina Lonskaya
- Department of Neurology, Laboratory for Dementia and Parkinsonism, Translational Neurotherapeutics Program, National Parkinson's Foundation Center of Excellence, Lewy Body Dementia Research Center of Excellence, Georgetown University Medical Center, N.W. Washington D.C., USA
| | - Charbel E-H Moussa
- Department of Neurology, Laboratory for Dementia and Parkinsonism, Translational Neurotherapeutics Program, National Parkinson's Foundation Center of Excellence, Lewy Body Dementia Research Center of Excellence, Georgetown University Medical Center, N.W. Washington D.C., USA
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16
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Webb M, Sideris DP, Biddle M. Modulation of mitochondrial dysfunction for treatment of disease. Bioorg Med Chem Lett 2019; 29:1270-1277. [DOI: 10.1016/j.bmcl.2019.03.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 03/21/2019] [Accepted: 03/25/2019] [Indexed: 12/18/2022]
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17
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Kim YJ, Kim K, Lee YY, Choo OS, Jang JH, Choung YH. Downregulated UCHL1 Accelerates Gentamicin-Induced Auditory Cell Death via Autophagy. Mol Neurobiol 2019; 56:7433-7447. [PMID: 31041655 DOI: 10.1007/s12035-019-1598-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 04/02/2019] [Indexed: 01/02/2023]
Abstract
The clinical use of aminoglycoside antibiotics is partly limited by their ototoxicity. The pathogenesis of aminoglycoside-induced ototoxicity still remains unknown. Here, RNA-sequencing was conducted to identify differentially expressed genes in rat cochlear organotypic cultures treated with gentamicin (GM), and 232 and 43 genes were commonly up- and downregulated, respectively, at day 1 and 2 after exposure. Ubiquitin carboxyl-terminal hydrolase isozyme L1 (Uchl1) was one of the downregulated genes whose expression was prominent in spiral ganglion cells (SGCs), lateral walls, as well as efferent nerve terminal and nerve fibers. We further investigated if a deficit of Uchl1 in organotypic cochlea and the House Ear Institute-Organ of Corti 1 (HEI-OC1) cells accelerates ototoxicity. We found that a deficit in Uchl1 accelerated GM-induced ototoxicity by showing a decreased number of SGCs and nerve fibers in organotypic cochlear cultures and HEI-OC1 cells. Furthermore, Uchl1-depleted HEI-OC1 cells revealed an increased number of autophagosomes accompanied by decreased lysosomal fusion. These data indicate that the downregulation of Uchl1 following GM treatment is deleterious to auditory cell survival, which results from the impaired autophagic flux. Our results provide evidence that UCHL1-dependent autophagic flux may have a potential as an otoprotective target for the treatment of GM-induced auditory cell death.
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Affiliation(s)
- Yeon Ju Kim
- Department of Otolaryngology, Ajou University School of Medicine, San 5 Woncheon-dong, Yeongtong-gu, Suwon, 443-721, Republic of Korea
| | - Kyung Kim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Yun Yeong Lee
- Department of Otolaryngology, Ajou University School of Medicine, San 5 Woncheon-dong, Yeongtong-gu, Suwon, 443-721, Republic of Korea
| | - Oak-Sung Choo
- Department of Otolaryngology, Ajou University School of Medicine, San 5 Woncheon-dong, Yeongtong-gu, Suwon, 443-721, Republic of Korea.,Department of Medical Sciences, Ajou University Graduate School of Medicine, San 5 Woncheon-dong, Yeongtong-gu, Suwon, 443-721, Republic of Korea
| | - Jeong Hun Jang
- Department of Otolaryngology, Ajou University School of Medicine, San 5 Woncheon-dong, Yeongtong-gu, Suwon, 443-721, Republic of Korea
| | - Yun-Hoon Choung
- Department of Otolaryngology, Ajou University School of Medicine, San 5 Woncheon-dong, Yeongtong-gu, Suwon, 443-721, Republic of Korea. .,Department of Medical Sciences, Ajou University Graduate School of Medicine, San 5 Woncheon-dong, Yeongtong-gu, Suwon, 443-721, Republic of Korea. .,BK21 Plus Research Center for Biomedical Sciences, Ajou University Graduate School of Medicine, San 5 Woncheon-dong, Yeongtong-gu, Suwon, 443-721, Republic of Korea.
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18
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Feng W, Wang J, Yan X, Zhai C, Shi W, Wang Q, Zhang Q, Li M. Paclitaxel alleviates monocrotaline-induced pulmonary arterial hypertension via inhibition of FoxO1-mediated autophagy. Naunyn Schmiedebergs Arch Pharmacol 2019; 392:605-613. [PMID: 30683943 DOI: 10.1007/s00210-019-01615-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 01/15/2019] [Indexed: 12/11/2022]
Abstract
It has been demonstrated that activation of autophagy is involved in the development of pulmonary arterial hypertension (PAH). Recent studies have shown that cytosolic forkhead box protein O1 (FoxO1) activates autophagy in cancer cells. Paclitaxel has been found to potentially reverse PAH progression. However, the role of FoxO1 and the effects of paclitaxel on autophagy in the pathogenesis of PAH remain unknown. PAH was generated by intraperitoneal injection of monocrotaline (MCT) to rats. The right ventricular systolic pressure (RVSP), the right ventricle hypertrophy index (RV/LV+S), and the percentage of medial wall thickness (%MT) were used to detect the development of PAH. Hematoxylin and eosin staining was performed to measure pulmonary vascular remodeling. The protein level, phosphorylation, and nucleus translocation of FoxO1 and the levels of LC3A, LC3B, and Beclin-1 were examined by immunoblotting. The results showed that in spite of reduced expression of FoxO1, elevated phosphorylation of FoxO1 caused most of FoxO1 accumulating in cytosolic fraction in MCT-PAH rats. Autophagy was also activated in the MCT-PAH group. In cultured rat pulmonary arterial smooth muscle cells (PASMCs), knockdown of FoxO1 markedly blocked autophagy activation, indicating that elevation of cytosolic FoxO1 stimulates autophagy activation. Treatment of PAH rats with paclitaxel reduced FoxO1 phosphorylation and increased FoxO1 nuclear accumulation, despite increased FoxO1 expression, therefore suppressed autophagy, finally reduced elevated RVSP, RV/LV+S, and %MT in MCT-induced PAH. Taken together, paclitaxel inhibits pulmonary vascular remodeling by FoxO1-mediated autophagy suppression, suggesting that paclitaxel might be a novel therapeutic agent for the prevention and treatment of PAH.
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Affiliation(s)
- Wei Feng
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- National Local Joint Engineering Research Center for Precision Surgery &Regenerative Medicine, Xi'an, Shaanxi, China
- Shaanxi Provincial Center Medicifor Regenerativene and Surgery Engineering Research, Xi'an, Shaanxi, China
| | - Jian Wang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- National Local Joint Engineering Research Center for Precision Surgery &Regenerative Medicine, Xi'an, Shaanxi, China
- Shaanxi Provincial Center Medicifor Regenerativene and Surgery Engineering Research, Xi'an, Shaanxi, China
| | - Xin Yan
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Cui Zhai
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Wenhua Shi
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- National Local Joint Engineering Research Center for Precision Surgery &Regenerative Medicine, Xi'an, Shaanxi, China
- Shaanxi Provincial Center Medicifor Regenerativene and Surgery Engineering Research, Xi'an, Shaanxi, China
| | - Qingting Wang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- National Local Joint Engineering Research Center for Precision Surgery &Regenerative Medicine, Xi'an, Shaanxi, China
- Shaanxi Provincial Center Medicifor Regenerativene and Surgery Engineering Research, Xi'an, Shaanxi, China
| | - Qianqian Zhang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Manxiang Li
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.
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19
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Boutouja F, Stiehm CM, Platta HW. mTOR: A Cellular Regulator Interface in Health and Disease. Cells 2019; 8:cells8010018. [PMID: 30609721 PMCID: PMC6356367 DOI: 10.3390/cells8010018] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 12/25/2018] [Accepted: 01/01/2019] [Indexed: 12/19/2022] Open
Abstract
The mechanistic target of Rapamycin (mTOR) is a ubiquitously-conserved serine/threonine kinase, which has a central function in integrating growth signals and orchestrating their physiologic effects on cellular level. mTOR is the core component of differently composed signaling complexes that differ in protein composition and molecular targets. Newly identified classes of mTOR inhibitors are being developed to block autoimmune diseases and transplant rejections but also to treat obesity, diabetes, and different types of cancer. Therefore, the selective and context-dependent inhibition of mTOR activity itself might come into the focus as molecular target to prevent severe diseases and possibly to extend life span. This review provides a general introduction to the molecular composition and physiologic function of mTOR complexes as part of the Special Issue “2018 Select Papers by Cells’ Editorial Board Members”.
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Affiliation(s)
- Fahd Boutouja
- Biochemie Intrazellulärer Transportprozesse, Ruhr-Universität Bochum, 44801 Bochum, Germany.
| | - Christian M Stiehm
- Biochemie Intrazellulärer Transportprozesse, Ruhr-Universität Bochum, 44801 Bochum, Germany.
| | - Harald W Platta
- Biochemie Intrazellulärer Transportprozesse, Ruhr-Universität Bochum, 44801 Bochum, Germany.
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20
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Tan S, Lu Y, Xu M, Huang X, Liu H, Jiang J, Wu B. β‐Arrestin1 enhances liver fibrosis through autophagy‐mediated Snail signaling. FASEB J 2018; 33:2000-2016. [DOI: 10.1096/fj.201800828rr] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Siwei Tan
- Department of GastroenterologyThe Third Affiliated Hospital of Sun Yat-Sen UniversityGuangzhouChina
- Guangdong Provincial Key Laboratory of Liver Disease ResearchGuangzhouChina
| | - Yu Lu
- Department of GastroenterologyThe Third Affiliated Hospital of Sun Yat-Sen UniversityGuangzhouChina
- Guangdong Provincial Key Laboratory of Liver Disease ResearchGuangzhouChina
| | - Minyi Xu
- Department of GastroenterologyThe Third Affiliated Hospital of Sun Yat-Sen UniversityGuangzhouChina
| | - Xiaoli Huang
- Department of GastroenterologyThe Third Affiliated Hospital of Sun Yat-Sen UniversityGuangzhouChina
| | - Huiling Liu
- Department of GastroenterologyThe Third Affiliated Hospital of Sun Yat-Sen UniversityGuangzhouChina
| | - Jie Jiang
- Department of GastroenterologyThe Third Affiliated Hospital of Sun Yat-Sen UniversityGuangzhouChina
| | - Bin Wu
- Department of GastroenterologyThe Third Affiliated Hospital of Sun Yat-Sen UniversityGuangzhouChina
- Guangdong Provincial Key Laboratory of Liver Disease ResearchGuangzhouChina
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21
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Shi WN, Cui SX, Song ZY, Wang SQ, Sun SY, Yu XF, Li Y, Zhang YH, Gao ZH, Qu XJ. Overexpression of SphK2 contributes to ATRA resistance in colon cancer through rapid degradation of cytoplasmic RXRα by K48/K63-linked polyubiquitination. Oncotarget 2018; 8:39605-39617. [PMID: 28465486 PMCID: PMC5503636 DOI: 10.18632/oncotarget.17174] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 03/26/2017] [Indexed: 12/27/2022] Open
Abstract
The resistance mechanisms that limit the efficacy of retinoid therapy in cancer are poorly understood. Sphingosine kinase 2 (SphK2) is a highly conserved enzyme that is mainly located in the nucleus and endoplasmic reticulum. Unlike well-studied sphingosine kinase 1 (SphK1) located in the cytosol, little has yet understood the functions of SphK2. Here we show that SphK2 overexpression contributes to the resistance of all-trans retinoic acid (ATRA) therapy in colon cancer through rapid degradation of cytoplasmic retinoid X receptor α (RXRα) by lysine 48 (K48)- and lysine 63 (K63)-based polyubiquitination. Human colonic adenocarcinoma HCT-116 cells transfected with SphK2 (HCT-116Sphk2 cells) demonstrate resistance to ATRA therapy as determined by in vitro and in vivo assays. Sphk2 overexpression increases the ATRA-induced nuclear RXRα export to cytoplasm and then rapidly degrades RXRα through the polyubiquitination pathway. We further show that Sphk2 activates the ubiquitin-proteasome system through the signal mechanisms of (1) K48-linked proteosomal degradation and (2) K63-linked ubiquitin-dependent autophagic degradation. These results provide new insights into the biological functions of Sphk2 and the molecular mechanisms that underlie the Sphk2-mediated resistance to retinoid therapy.
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Affiliation(s)
- Wen-Na Shi
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Shu-Xiang Cui
- Beijing Key Laboratory of Environmental Toxicology, Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, China
| | - Zhi-Yu Song
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Shu-Qing Wang
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Shi-Yue Sun
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Xin-Feng Yu
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Ye Li
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Yu-Hang Zhang
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Zu-Hua Gao
- Department of Pathology, McGill University, Montreal, Quebec, Canada
| | - Xian-Jun Qu
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
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22
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Li C, Zhang J, Xu H, Chang M, Lv C, Xue W, Song Z, Zhang L, Zhang X, Tian X. Retigabine ameliorates acute stress-induced impairment of spatial memory retrieval through regulating USP2 signaling pathways in hippocampal CA1 area. Neuropharmacology 2018; 135:151-162. [PMID: 29501527 DOI: 10.1016/j.neuropharm.2018.02.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 02/24/2018] [Accepted: 02/27/2018] [Indexed: 12/14/2022]
Abstract
Acute stress could trigger maladaptive changes associated with stress-related cognitive and emotional deficits. Dysfunction of ion channel or receptor in the hippocampal area has been linked to the cognitive deficits induced by stress. It is known that Kv7 channel openers, including FDA-approved drug retigabine, show cognitive protective efficacy. However, the underlying molecular mechanisms remain elusive. Here we showed that exposing adult male rats to acute stress significantly impaired the spatial memory, a cognitive process controlled by the hippocampus. Concomitantly, significantly reduced AMPA receptor expression was found in hippocampal CA1 area from acute stressed rats. This effect relied on the down-regulation of deubiquitinating enzyme USP2 and its upstream regulators (PGC-1α and β-catenin), and the subsequent enhancement of mTOR-related autophagy which is regulated by USP2. These findings suggested that acute stress dampened AMPA receptor expression by controlling USP2-related signaling, which caused the detrimental effect on hippocampus-dependent cognitive processes. We also found that retigabine alleviated acute stress-induced spatial memory retrieval impairment through adjusting the aberrance of USP2, its upstream regulators (PGC-1α, E4BP4 and β-catenin) and its downstream targets (mTOR, autophagy and GluA1). Our results have identified USP2 as a key molecule that mediates stress-induced spatial memory retrieval impairment, which provides a framework for new druggable targets to conceptually treat stress-associated cognitive deficits.
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Affiliation(s)
- Cai Li
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Ji Zhang
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Haiwei Xu
- Key Lab of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450000, China
| | - Mujun Chang
- Center for Translational Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Chuntao Lv
- Key Lab of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450000, China
| | - Wenhua Xue
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Zhizhen Song
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Lizhen Zhang
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Xiaojian Zhang
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China.
| | - Xin Tian
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China; Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China.
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23
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Wang SS, Cen X, Liang XH, Tang YL. Macrophage migration inhibitory factor: a potential driver and biomarker for head and neck squamous cell carcinoma. Oncotarget 2018; 8:10650-10661. [PMID: 27788497 PMCID: PMC5354689 DOI: 10.18632/oncotarget.12890] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 10/19/2016] [Indexed: 02/05/2023] Open
Abstract
Macrophage migration inhibitory factor (MIF), a pleiotropic proinflammatory cytokine, has been showed to be associated with the immunopathogenesis of many diseases. Recent study demonstrated that MIF promoted tumorigenesis and tumor progression and played a critical role in various kinds of human cancer including head and neck squamous cell carcinoma(HNSCC). Hence, in this paper we retrospected the relationship between MIF and angiogenesis, epithelial-mesenchymal transition (EMT), inflammation, immune response, hypoxia microenvironment, and discussed whether it is a promising biomarker for diagnosis and supervisor of HNSCC.
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Affiliation(s)
- Sha-Sha Wang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu Sichuan, People's Republic of China.,Department of Oral and Maxillofacial Surgery, West China College of Stomatology, Sichuan University, Chengdu Sichuan, People's Republic of China
| | - Xiao Cen
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu Sichuan, People's Republic of China.,Department of Oral and Maxillofacial Surgery, West China College of Stomatology, Sichuan University, Chengdu Sichuan, People's Republic of China
| | - Xin-Hua Liang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu Sichuan, People's Republic of China.,Department of Oral and Maxillofacial Surgery, West China College of Stomatology, Sichuan University, Chengdu Sichuan, People's Republic of China
| | - Ya-Ling Tang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu Sichuan, People's Republic of China.,Department of Oral Pathology, West China Hospital of Stomatology, Sichuan University, Chengdu Sichuan, People's Republic of China
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24
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Estévez-López F, Aparicio VA, Ruiz JR, Martínez-González LJ, Delgado-Fernández M, Álvarez-Cubero MJ. The TT genotype of the rs6860 polymorphism of the charged multivesicular body protein 1A gene is associated with susceptibility to fibromyalgia in southern Spanish women. Rheumatol Int 2017; 38:531-533. [PMID: 29247346 DOI: 10.1007/s00296-017-3896-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 11/26/2017] [Indexed: 12/26/2022]
Affiliation(s)
- Fernando Estévez-López
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain. .,Department of Psychology, Faculty of Social and Behavioural Sciences, Utrecht University, Utrecht, The Netherlands.
| | - Virginia A Aparicio
- Department of Physiology, Faculty of Pharmacy, Faculty of Sport Sciences, and Institute of Nutrition and Food Technology, University of Granada, Granada, Spain
| | - Jonatan R Ruiz
- PROFITH "PROmoting FITness and Health Through Physical Activity" Research Group, Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Luis J Martínez-González
- GENYO (Pfizer-University of Granada-Andalusian Government Centre for Genomics and Oncological Research), Av. Ilustracion, 114-PTS, 18016, Granada, Spain
| | - Manuel Delgado-Fernández
- Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - María J Álvarez-Cubero
- GENYO (Pfizer-University of Granada-Andalusian Government Centre for Genomics and Oncological Research), Av. Ilustracion, 114-PTS, 18016, Granada, Spain.,Department of Biochemistry & Molecular Biology III, Faculty of Medicine, University of Granada, Granada, Spain
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25
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Regulation of the Tumor-Suppressor BECLIN 1 by Distinct Ubiquitination Cascades. Int J Mol Sci 2017; 18:ijms18122541. [PMID: 29186924 PMCID: PMC5751144 DOI: 10.3390/ijms18122541] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 11/22/2017] [Accepted: 11/24/2017] [Indexed: 12/23/2022] Open
Abstract
Autophagy contributes to cellular homeostasis through the degradation of various intracellular targets such as proteins, organelles and microbes. This relates autophagy to various diseases such as infections, neurodegenerative diseases and cancer. A central component of the autophagy machinery is the class III phosphatidylinositol 3-kinase (PI3K-III) complex, which generates the signaling lipid phosphatidylinositol 3-phosphate (PtdIns3P). The catalytic subunit of this complex is the lipid-kinase VPS34, which associates with the membrane-targeting factor VPS15 as well as the multivalent adaptor protein BECLIN 1. A growing list of regulatory proteins binds to BECLIN 1 and modulates the activity of the PI3K-III complex. Here we discuss the regulation of BECLIN 1 by several different types of ubiquitination, resulting in distinct polyubiquitin chain linkages catalyzed by a set of E3 ligases. This contribution is part of the Special Issue “Ubiquitin System”.
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26
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Yu R, Xiang Z, Zhou Y, Huang H, Zeng J. Overexpression of microRNA-26b attenuates angiotensin II-induced cardiac hypertrophy through inhibition of autophagic responses. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2017; 10:9409-9417. [PMID: 31966813 PMCID: PMC6965924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 07/20/2017] [Indexed: 06/10/2023]
Abstract
Although microRNA-26b (miR-26b) has been previously identified as a regulator of cardiac hypertrophy, the specific mechanism remains elusive. Cardiac hypertrophy was induced by thoracic aortic constriction (TAC) in mice. Four weeks after surgery, the cardiac hypertrophy mice model was successfully established. In addition, a cell model of hypertrophy was also established based on angiotensin II (AngII)-induced neonatal mouse ventricular cardiomyocytes. We observed that miR-26b was markedly down-regulated in hypertrophic myocardium tissues and hypertrophic cultured cardiomyocytes, whereas administration of miR-26b mimics suppressed hypertrophic phenotype of cultured cardiomyocytes. Additionally, it was shown that overexpression of miR-26b attenuated autophagic responses in hypertrophic cardiomyocytes, which was confirmed by reducing Beclin-1 expression and the light chain 3(LC3)-II/LC3-I ratio. Taken together, our study provides substantial evidence that upregulation of miR-26b expression might be a potential effective therapeutic strategy to attenuate cardiac hypertrophy.
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Affiliation(s)
- Rong Yu
- Department of Geriatrics, Sichuan Provincial Academy of Medical Sciences, Sichuan Provincial People’ HospitalChengdu, China
| | - Zheng Xiang
- Department of Geriatrics, Sichuan Provincial Academy of Medical Sciences, Sichuan Provincial People’ HospitalChengdu, China
| | - Yongmei Zhou
- Department of Cardiology, Sichuan Provincial Academy of Medical Sciences, Sichuan Provincial People’ HospitalChengdu, China
| | - Hui Huang
- Department of Cardiology, Sichuan Provincial Academy of Medical Sciences, Sichuan Provincial People’ HospitalChengdu, China
| | - Jie Zeng
- Department of Cardiology, Sichuan Provincial Academy of Medical Sciences, Sichuan Provincial People’ HospitalChengdu, China
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27
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Wong YK, Zhang J, Hua ZC, Lin Q, Shen HM, Wang J. Recent advances in quantitative and chemical proteomics for autophagy studies. Autophagy 2017; 13:1472-1486. [PMID: 28820289 DOI: 10.1080/15548627.2017.1313944] [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] [Indexed: 12/20/2022] Open
Abstract
Macroautophagy/autophagy is an evolutionarily well-conserved cellular degradative process with important biological functions that is closely implicated in health and disease. In recent years, quantitative mass spectrometry-based proteomics and chemical proteomics have emerged as important tools for the study of autophagy, through large-scale unbiased analysis of the proteome or through highly specific and accurate analysis of individual proteins of interest. At present, a variety of approaches have been successfully applied, including (i) expression and interaction proteomics for the study of protein post-translational modifications, (ii) investigating spatio-temporal dynamics of protein synthesis and degradation, and (iii) direct determination of protein activity and profiling molecular targets in the autophagic process. In this review, we attempted to provide an overview of principles and techniques relevant to the application of quantitative and chemical proteomics methods to autophagy, and outline the current landscape as well as future outlook of these methods in autophagy research.
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Affiliation(s)
- Yin-Kwan Wong
- a Department of Physiology, Yong Loo Lin School of Medicine , National University of Singapore , Singapore
| | - Jianbin Zhang
- b Department of Oncology, Clinical Research Institute , Zhejiang Provincial People's Hospital , Hangzhou , China
| | - Zi-Chun Hua
- c Changzhou High-Tech Research Institute of Nanjing University and the State Key Laboratory of Pharmaceutical Biotechnology, College of Life Sciences , Nanjing University , Nanjing , China
| | - Qingsong Lin
- d Department of Biological Sciences , National University of Singapore , Singapore
| | - Han-Ming Shen
- a Department of Physiology, Yong Loo Lin School of Medicine , National University of Singapore , Singapore.,e NUS Graduate School for Integrative Sciences and Engineering , National University of Singapore , Singapore
| | - Jigang Wang
- a Department of Physiology, Yong Loo Lin School of Medicine , National University of Singapore , Singapore.,c Changzhou High-Tech Research Institute of Nanjing University and the State Key Laboratory of Pharmaceutical Biotechnology, College of Life Sciences , Nanjing University , Nanjing , China
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28
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Wang X, Zhai H, Wang F. 6-OHDA Induces Oxidation of F-box Protein Fbw7β by Chaperone-Mediated Autophagy in Parkinson’s Model. Mol Neurobiol 2017; 55:4825-4833. [DOI: 10.1007/s12035-017-0686-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 07/11/2017] [Indexed: 01/04/2023]
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Reidick C, Boutouja F, Platta HW. The class III phosphatidylinositol 3-kinase Vps34 in Saccharomyces cerevisiae. Biol Chem 2017; 398:677-685. [PMID: 27935849 DOI: 10.1515/hsz-2016-0288] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 11/14/2016] [Indexed: 12/23/2022]
Abstract
The class III phosphatidylinositol 3-kinase Vps34 (vacuolar protein sorting 34) catalyzes for the formation of the signaling lipid phosphatidylinositol-3-phopsphate, which is a central factor in the regulation of autophagy, endocytic trafficking and vesicular transport. In this article, we discuss the functional role of the lipid kinase Vps34 in Saccharomyces cerevisiae.
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Affiliation(s)
- Christina Reidick
- Biochemie Intrazellulärer Transportprozesse, Ruhr-Universität Bochum, D-44801 Bochum
| | - Fahd Boutouja
- Biochemie Intrazellulärer Transportprozesse, Ruhr-Universität Bochum, D-44801 Bochum
| | - Harald W Platta
- Biochemie Intrazellulärer Transportprozesse, Ruhr-Universität Bochum, D-44801 Bochum
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30
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Delta opioid receptor agonist attenuates lipopolysaccharide-induced myocardial injury by regulating autophagy. Biochem Biophys Res Commun 2017. [PMID: 28647372 DOI: 10.1016/j.bbrc.2017.06.029] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Previous studies have described the protective effects of DADLE on myocardial injury in sepsis. Recently, autophagy has been shown to be an innate defense mechanism in sepsis-related myocardial injury. However, whether DADLE has an pro-autophagic effect is yet to be elucidated. The present study aimed to investigate the effect of DADLE on the regulation of autophagy during sepsis. METHODS Male mice were subjected to LPS or vehicle intraperitoneal injection. After LPS injection, mice received either DADLE, Naltrindole or vehicle. ELISA and JC-1 were used to evaluate the level cTnI and Mitochondrial membrane potential. Cardiac ultrastructural and autophagosomes were visualized by transmission electron microscopy. The relative protein levels were analyzed by Western blot. RESULTS The results showed that treatment with DADLE both immediately or 4 h after LPS intraperitoneal injection could improve the survival rate of mice with endotoxemic. DADLE could ease myocardium ultrastructure injury induced by LPS, this cardioprotective effect was also seen in increased MMP levels, and decreased cTnI levels. Through observation of transmission electron microscopy and Western blot we have discovered that the amount of autophagosome and the expression of autophagy related protein LC3II, Beclin1 were significantly increased with DADLE treatment. DADLE promoted LPS-induced autophagosome maturation as indicated by the increased LAMP-1 protein level and decreased SQSTM1/p62 protein level. The selective δ-opioid receptor antagonist Naltrindole play an opposite effects. CONCLUSIONS DADLE could improve the survival and protect myocardial dysfunction in mice with LPS-induced endotoxemia. This effect was related to the increase of autophagy.
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31
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Lawson AP, Bak DW, Shannon DA, Long MJC, Vijaykumar T, Yu R, Oualid FE, Weerapana E, Hedstrom L. Identification of deubiquitinase targets of isothiocyanates using SILAC-assisted quantitative mass spectrometry. Oncotarget 2017; 8:51296-51316. [PMID: 28881649 PMCID: PMC5584250 DOI: 10.18632/oncotarget.17261] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 03/22/2017] [Indexed: 01/14/2023] Open
Abstract
Cruciferous vegetables such as broccoli and kale have well documented chemopreventative and anticancer effects that are attributed to the presence of isothiocyanates (ITCs). ITCs modulate the levels of many oncogenic proteins, but the molecular mechanisms of ITC action are not understood. We previously reported that phenethyl isothiocyanate (PEITC) inhibits two deubiquitinases (DUBs), USP9x and UCH37. DUBs regulate many cellular processes and DUB dysregulation is linked to the pathogenesis of human diseases including cancer, neurodegeneration, and inflammation. Using SILAC assisted quantitative mass spectrometry, here we identify 9 new PEITC-DUB targets: USP1, USP3, USP10, USP11, USP16, USP22, USP40, USP48 and VCPIP1. Seven of these PEITC-sensitive DUBs have well-recognized roles in DNA repair or chromatin remodeling. PEITC both inhibits USP1 and increases its ubiquitination and degradation, thus decreasing USP1 activity by two mechanisms. The loss of USP1 activity increases the level of mono-ubiquitinated DNA clamp PCNA, impairing DNA repair. Both the inhibition/degradation of USP1 and the increase in mono-ubiquitinated PCNA are new activities for PEITC that can explain the previously recognized ability of ITCs to enhance cancer cell sensitivity to cisplatin treatment. Our work also demonstrates that PEITC reduces the mono-ubiquityl histones H2A and H2B. Understanding the mechanism of action of ITCs should facilitate their use as therapeutic agents.
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Affiliation(s)
- Ann P Lawson
- Department of Biology, Brandeis University, Waltham, MA 02453-9110, USA
| | - Daniel W Bak
- Department of Chemistry, Merkert Center, Boston College, Chestnut Hill, MA 02467-3860, USA
| | - D Alexander Shannon
- Department of Chemistry, Merkert Center, Boston College, Chestnut Hill, MA 02467-3860, USA
| | - Marcus J C Long
- Graduate Program in Biochemistry and Biophysics, Brandeis University, Waltham, MA 02453-9110, USA.,Current address: Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA
| | - Tushara Vijaykumar
- Graduate Program in Molecular and Cellular Biology, Brandeis University, Waltham, MA 02453-9110, USA.,Current address: Sanofi Genzyme, Framingham, MA 01701, USA
| | - Runhan Yu
- Department of Chemistry, Brandeis University, Waltham, MA 02453-9110, USA
| | | | - Eranthie Weerapana
- Department of Chemistry, Merkert Center, Boston College, Chestnut Hill, MA 02467-3860, USA
| | - Lizbeth Hedstrom
- Department of Biology, Brandeis University, Waltham, MA 02453-9110, USA.,Department of Chemistry, Brandeis University, Waltham, MA 02453-9110, USA
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32
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He Y, Cao X, Guo P, Li X, Shang H, Liu J, Xie M, Xu Y, Liu X. Quercetin induces autophagy via FOXO1-dependent pathways and autophagy suppression enhances quercetin-induced apoptosis in PASMCs in hypoxia. Free Radic Biol Med 2017; 103:165-176. [PMID: 27979659 DOI: 10.1016/j.freeradbiomed.2016.12.016] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Revised: 12/10/2016] [Accepted: 12/12/2016] [Indexed: 02/06/2023]
Abstract
Quercetin, an important dietary flavonoid has been demonstrated to potentially reverse or even prevent pulmonary arterial hypertension (PAH) progression. However, the effects of quercetin on apoptosis and autophagy in pulmonary arterial smooth muscle cells (PASMCs) have not yet been clearly elucidated. The current study found that quercetin significantly induce the apoptotic and autophagic capacities of PASMCs in vitro and in vivo in hypoxia. In addition, we found that quercetin increases FOXO1 (a major mediator in autophagy regulation) expression and transcriptional activity. Moreover, FOXO1 knockdown by siRNAs inhibited the phosphorylation of mTOR and 4E-BPI, which is downstream of P70-S6K, and markedly blocked quercetin-induced autophagy. We also observed that FOXO1-mediated autophagy was achieved via SESN3 not Rictor upregulation and after mTOR suppression. Furthermore, Treatment with autophagy-specific inhibitors could markedly enhance quercetin-induced apoptosis in PASMCs under hypoxia. Finally, quercetin in combination with autophagy inhibition treatment could enhance the therapeutic effects of quercetin in hypoxia-associated PAH in vivo. Taken together, quercetin could enhance hypoxia-induced autophagy through the FOXO1-SENS3-mTOR pathway in PASMCs. Combining quercetin and autophagy inhibitors may be a novel therapeutic strategy for treating hypoxia-associated PAH.
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Affiliation(s)
- Yuanzhou He
- Department of Respiratory Diseases, Tongji Hospital, Key Lab of Pulmonary Diseases of Health Ministry, Key Site of National Clinical Research Center for Respiratory Disease, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Xiaopei Cao
- Department of Respiratory Diseases, Tongji Hospital, Key Lab of Pulmonary Diseases of Health Ministry, Key Site of National Clinical Research Center for Respiratory Disease, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Pujian Guo
- Department of Respiratory Diseases, Tongji Hospital, Key Lab of Pulmonary Diseases of Health Ministry, Key Site of National Clinical Research Center for Respiratory Disease, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Xiaochen Li
- Department of Respiratory Diseases, Tongji Hospital, Key Lab of Pulmonary Diseases of Health Ministry, Key Site of National Clinical Research Center for Respiratory Disease, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Huihui Shang
- Department of Respiratory Diseases, Tongji Hospital, Key Lab of Pulmonary Diseases of Health Ministry, Key Site of National Clinical Research Center for Respiratory Disease, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Jin Liu
- Department of Respiratory Diseases, Tongji Hospital, Key Lab of Pulmonary Diseases of Health Ministry, Key Site of National Clinical Research Center for Respiratory Disease, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Min Xie
- Department of Respiratory Diseases, Tongji Hospital, Key Lab of Pulmonary Diseases of Health Ministry, Key Site of National Clinical Research Center for Respiratory Disease, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Yongjian Xu
- Department of Respiratory Diseases, Tongji Hospital, Key Lab of Pulmonary Diseases of Health Ministry, Key Site of National Clinical Research Center for Respiratory Disease, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Xiansheng Liu
- Department of Respiratory Diseases, Tongji Hospital, Key Lab of Pulmonary Diseases of Health Ministry, Key Site of National Clinical Research Center for Respiratory Disease, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China.
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33
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Li X, Zhang X, Zheng L, Kou J, Zhong Z, Jiang Y, Wang W, Dong Z, Liu Z, Han X, Li J, Tian Y, Zhao Y, Yang L. Hypericin-mediated sonodynamic therapy induces autophagy and decreases lipids in THP-1 macrophage by promoting ROS-dependent nuclear translocation of TFEB. Cell Death Dis 2016; 7:e2527. [PMID: 28005078 PMCID: PMC5260986 DOI: 10.1038/cddis.2016.433] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Revised: 10/29/2016] [Accepted: 11/21/2016] [Indexed: 12/15/2022]
Abstract
Lipid catabolism disorder is the primary cause of atherosclerosis. Transcription factor EB (TFEB) prevents atherosclerosis by activating macrophage autophagy to promote lipid degradation. Hypericin-mediated sonodynamic therapy (HY-SDT) has been proved non-invasively inducing THP-1-derived macrophage apoptosis; however, it is unknown whether macrophage autophagy could be triggered by HY-SDT to influence cellular lipid catabolism via regulating TFEB. Here, we report that HY-SDT resulted in the time-dependent THP-1-derived macrophage autophagy activation through AMPK/AKT/mTOR pathway. Besides, TFEB nuclear translocation in macrophage was triggered by HY-SDT to promote autophagy activation and lysosome regeneration which enhanced lipid degradation in response to atherogenic lipid stressors. Moreover, following HY-SDT, the ABCA1 expression level was increased to promote lipid efflux in macrophage, and the expression levels of CD36 and SR-A were decreased to inhibit lipid uptake, both of which were prevented by TFEB knockdown. These results indicated that TFEB nuclear translocation activated by HY-SDT was not only the key regulator of autophagy activation and lysosome regeneration in macrophage to promote lipolysis, but also had a crucial role in reverse cholesterol transporters to decrease lipid uptake and increase lipid efflux. Reactive oxygen species (ROS) were adequately generated in macrophage by HY-SDT. Further, ROS scavenger N-acetyl-l-cysteine abolished HY-SDT-induced TFEB nuclear translocation and autophagy activation, implying that ROS were the primary upstream factors responsible for these effects during HY-SDT. In summary, our data indicate that HY-SDT decreases lipid content in macrophage by promoting ROS-dependent nuclear translocation of TFEB to influence consequent autophagy activation and cholesterol transporters. Thus, HY-SDT may be beneficial for atherosclerosis via TFEB regulation to ameliorate lipid overload in atherosclerotic plaques.
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Affiliation(s)
- Xuesong Li
- Department of Pathophysiology, Key Laboratory of Cardiovascular Pathophysiology, Harbin Medical University, Harbin, China
| | - Xin Zhang
- Department of Respiratory Medicine, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, China.,Department of Cardiology, The First Affiliated Hospital, Cardiovascular Institute, Harbin Medical University, Harbin, China
| | - Longbin Zheng
- Department of Pathophysiology, Key Laboratory of Cardiovascular Pathophysiology, Harbin Medical University, Harbin, China
| | - Jiayuan Kou
- Department of Pathophysiology, Key Laboratory of Cardiovascular Pathophysiology, Harbin Medical University, Harbin, China
| | - Zhaoyu Zhong
- Department of Pathophysiology, Key Laboratory of Cardiovascular Pathophysiology, Harbin Medical University, Harbin, China
| | - Yueqing Jiang
- Department of Pathophysiology, Key Laboratory of Cardiovascular Pathophysiology, Harbin Medical University, Harbin, China
| | - Wei Wang
- Department of Cardiology, The First Affiliated Hospital, Cardiovascular Institute, Harbin Medical University, Harbin, China
| | - Zengxiang Dong
- Department of Cardiology, The First Affiliated Hospital, Cardiovascular Institute, Harbin Medical University, Harbin, China
| | - Zhongni Liu
- Department of Pathophysiology, Key Laboratory of Cardiovascular Pathophysiology, Harbin Medical University, Harbin, China
| | - Xiaobo Han
- Department of Pathophysiology, Key Laboratory of Cardiovascular Pathophysiology, Harbin Medical University, Harbin, China
| | - Jing Li
- Department of Electron Microscopic Center, Basic Medical Science College, Harbin Medical University, Harbin, China
| | - Ye Tian
- Department of Pathophysiology, Key Laboratory of Cardiovascular Pathophysiology, Harbin Medical University, Harbin, China.,Division of Cardiology, The First Affiliated Hospital, Harbin Medical University, Harbin, China
| | - Yajun Zhao
- Department of Pathophysiology, Key Laboratory of Cardiovascular Pathophysiology, Harbin Medical University, Harbin, China
| | - Liming Yang
- Department of Pathophysiology, Key Laboratory of Cardiovascular Pathophysiology, Harbin Medical University, Harbin, China
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Xie L, Li A, Shen J, Cao M, Ning X, Yuan D, Ji Y, Wang H, Ke K. OTUB1 attenuates neuronal apoptosis after intracerebral hemorrhage. Mol Cell Biochem 2016; 422:171-180. [PMID: 27629786 DOI: 10.1007/s11010-016-2817-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 09/08/2016] [Indexed: 01/18/2023]
Abstract
OTUB1 is a member of deubiquitinating enzymes, which was shown as a proteasome-associated DUB to be involved in the proteins Ub-dependent degradation. Previous studies have indicated that OTUB1 was expressed in brain. But its distribution and function in the brain remain unclear. In this study, we explored the roles of OTUB1 protein in the pathophysiology of intracerebral hemorrhage (ICH). From the results of Western blot, immunohistochemistry, and immunofluorescence, we found an obvious up-regulation of OTUB1 in neurons adjacent to the hematoma after ICH. Furthermore, we also found that the increase of OTUB1 expression was accompanied by the enhanced expression of Bax and active caspase-3, and decreased expression of Bcl-2 in the pathological process of rat ICH. What's more, our in vitro study, using OTUB1 RNA interference in PC12 cells, suggested that OTUB1 might exert its anti-apoptotic function in neuronal apoptosis. Therefore, OTUB1 may play a role in protecting the brain from secondary damage following ICH.
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Affiliation(s)
- Lili Xie
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
| | - Aihong Li
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
| | - Jiabing Shen
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
| | - Maohong Cao
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
| | - Xiaojin Ning
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
| | - Debin Yuan
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
| | - Yuteng Ji
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
| | - Hongmei Wang
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
| | - Kaifu Ke
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu, People's Republic of China.
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Wing SS. Deubiquitinating enzymes in skeletal muscle atrophy-An essential role for USP19. Int J Biochem Cell Biol 2016; 79:462-468. [PMID: 27475983 DOI: 10.1016/j.biocel.2016.07.028] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 07/25/2016] [Accepted: 07/26/2016] [Indexed: 01/07/2023]
Abstract
The ubiquitin proteasome system is well recognized to be involved in mediating muscle atrophy in response to diverse catabolic conditions. To date, almost all of the genes that have been implicated are ubiquitin ligases. Although ubiquitination is modulated also by deubiquitinating enzymes, the roles of these enzymes in muscle wasting remains largely unexplored. In this article, the potential roles of deubiquitinating enzymes in regulating muscle size are discussed. This is followed by a review of the roles described for USP19, the deubiquitinating enzyme that has been most studied in muscle wasting. This enzyme is upregulated in muscle in many catabolic conditions and its inactivation leads to protection from muscle loss induced by stimuli that are common in many illnesses causing cachexia. It can regulate both protein synthesis and protein degradation as well as myogenesis, thereby modulating the key processes that control muscle mass. Roles for other deubiquitinating enzymes remain possible and to be explored.
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Affiliation(s)
- Simon S Wing
- Dept. of Medicine, McGill University, Experimental Therapeutics and Metabolism Program, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada.
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36
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Gao W, Chen SR, Wu MY, Gao K, Li YL, Wang HY, Li CY, Li H. Methylprednisolone exerts neuroprotective effects by regulating autophagy and apoptosis. Neural Regen Res 2016; 11:823-8. [PMID: 27335569 PMCID: PMC4904476 DOI: 10.4103/1673-5374.182711] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Methylprednisolone markedly reduces autophagy and apoptosis after secondary spinal cord injury. Here, we investigated whether pretreatment of cells with methylprednisolone would protect neuron-like cells from subsequent oxidative damage via suppression of autophagy and apoptosis. Cultured N2a cells were pretreated with 10 µM methylprednisolone for 30 minutes, then exposed to 100 µM H2O2 for 24 hours. Inverted phase contrast microscope images, MTT assay, flow cytometry and western blot results showed that, compared to cells exposed to 100 µM H2O2 alone, cells pretreated with methylprednisolone had a significantly lower percentage of apoptotic cells, maintained a healthy morphology, and showed downregulation of autophagic protein light chain 3B and Beclin-1 protein expression. These findings indicate that methylprednisolone exerted neuroprotective effects against oxidative damage by suppressing autophagy and apoptosis.
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Affiliation(s)
- Wei Gao
- Department of Biochemistry, Liaoning Medical University, Jinzhou, Liaoning Province, China
| | - Shu-Rui Chen
- Department of Biochemistry, Liaoning Medical University, Jinzhou, Liaoning Province, China
| | - Meng-Yao Wu
- Department of Biochemistry, Liaoning Medical University, Jinzhou, Liaoning Province, China
| | - Kai Gao
- Department of Biochemistry, Liaoning Medical University, Jinzhou, Liaoning Province, China
| | - Yuan-Long Li
- Department of Biochemistry, Liaoning Medical University, Jinzhou, Liaoning Province, China
| | - Hong-Yu Wang
- Department of Biochemistry, Liaoning Medical University, Jinzhou, Liaoning Province, China
| | - Chen-Yuan Li
- Department of Biochemistry, Liaoning Medical University, Jinzhou, Liaoning Province, China
| | - Hong Li
- Department of Biochemistry, Liaoning Medical University, Jinzhou, Liaoning Province, China
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