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Jia X, Mao D, Guo J, Ke J, Zhu Y, Zhao X, Luo Z, Liu X, Tang R, Hou R, Lan H, Zheng Q. Epigallocatechin gallate attenuated high glucose-induced pancreatic beta cell dysfunction by modulating DRP1-mediated mitochondrial apoptosis pathways. Sci Rep 2024; 14:16809. [PMID: 39039202 PMCID: PMC11263710 DOI: 10.1038/s41598-024-67867-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 07/16/2024] [Indexed: 07/24/2024] Open
Abstract
Long-term exposure to hyperglycemic conditions leads to β-cell dysfunction, particularly mitochondrial dysfunction, and inflammatory and oxidative stress responses, which are considered the primary causes of β-cell death and the hallmarks of diabetes. Plant-active ingredients may play a key role in glycemic control. Epigallocatechin gallate (EGCG) is a characteristic catechin derived from tea that possesses anti-diabetic properties. Nonetheless, its underlying mechanisms remain elusive. Herein, the protective role of EGCG on high glucose (33 mM)-induced pancreatic beta cell dysfunction and its possible molecular mechanisms were investigated. Briefly, MIN6 cells were treated with glucose and EGCG (10 µM, 20 µM, and 40 µM) for 48 h. Our results revealed that EGCG dose-dependently restored mitochondrial membrane potential and concomitantly alleviated cell apoptosis. Mechanistically, the expression level of apoptotic protein BAX and Dynamic related protein 1 (DRP1) was significantly downregulated following EGCG treatment, whereas that of the anti-apoptotic protein BCL-2 was significantly upregulated. Taken together, EGCG alleviated high glucose-induced pancreatic beta cell dysfunction by targeting the DRP1-related mitochondrial apoptosis pathway and thus can serve as a nutritional intervention for the preservation of beta cell dysfunction in patients with type 2 diabetes mellitus.
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Affiliation(s)
- Xu Jia
- Department of Pharmacy, Affiliated Hospital of North Sichuan Medical College, Nanchong, 637000, China
| | - Danting Mao
- Medical Functional Experiment Center, North Sichuan Medical College, Nanchong, 637000, China
| | - Jianwei Guo
- Medical Functional Experiment Center, North Sichuan Medical College, Nanchong, 637000, China
| | - Jiangyu Ke
- Medical Functional Experiment Center, North Sichuan Medical College, Nanchong, 637000, China
| | - Yanlin Zhu
- Medical Functional Experiment Center, North Sichuan Medical College, Nanchong, 637000, China
| | - Xiaoyang Zhao
- Medical Functional Experiment Center, North Sichuan Medical College, Nanchong, 637000, China
| | - Ziren Luo
- Medical Functional Experiment Center, North Sichuan Medical College, Nanchong, 637000, China
| | - Xinghai Liu
- Medical Functional Experiment Center, North Sichuan Medical College, Nanchong, 637000, China
| | - Rui Tang
- Medical Functional Experiment Center, North Sichuan Medical College, Nanchong, 637000, China
| | - Ruihan Hou
- Medical Functional Experiment Center, North Sichuan Medical College, Nanchong, 637000, China
| | - Haitao Lan
- Medical Functional Experiment Center, North Sichuan Medical College, Nanchong, 637000, China.
| | - Qian Zheng
- Medical Functional Experiment Center, North Sichuan Medical College, Nanchong, 637000, China.
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2
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Chang Y, Chen Q, Li H, Xu J, Tan M, Xiong X, Sun Y. The UBE2F-CRL5 ASB11-DIRAS2 axis is an oncogene and tumor suppressor cascade in pancreatic cancer cells. Dev Cell 2024; 59:1317-1332.e5. [PMID: 38574733 DOI: 10.1016/j.devcel.2024.03.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 11/04/2023] [Accepted: 03/06/2024] [Indexed: 04/06/2024]
Abstract
UBE2F, a neddylation E2, neddylates CUL5 to activate cullin-RING ligase-5, upon coupling with neddylation E3 RBX2/SAG. Whether and how UBE2F controls pancreatic tumorigenesis is previously unknown. Here, we showed that UBE2F is essential for the growth of human pancreatic cancer cells with KRAS mutation. In the mouse KrasG12D pancreatic ductal adenocarcinoma (PDAC) model, Ube2f deletion suppresses cerulein-induced pancreatitis, and progression of acinar-to-ductal metaplasia (ADM) and pancreatic intraepithelial neoplasia. Mechanistically, Ube2f deletion inactivates the Mapk-c-Myc signals via blocking ubiquitylation of Diras2, a substrate of CRL5Asb11 E3 ligase. Biologically, DIRAS2 suppresses growth and survival of human pancreatic cancer cells harboring mutant KRAS, and Diras2 deletion largely rescues the phenotypes induced by Ube2f deletion. Collectively, Ube2f or Diras2 plays a tumor-promoting or tumor-suppressive role in the mouse KrasG12D PDAC model, respectively. The UBE2F-CRL5ASB11 axis could serve as a valid target for pancreatic cancer, whereas the levels of UBE2F or DIRAS2 may serve as prognostic biomarkers for PDAC patients.
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Affiliation(s)
- Yu Chang
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education), The Second Affiliated Hospital, Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou 310029, China; Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Department of Radiation Oncology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Qian Chen
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education), The Second Affiliated Hospital, Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou 310029, China; Cancer Center of Zhejiang University, Hangzhou 310029, China
| | - Hua Li
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jie Xu
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Mingjia Tan
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Xiufang Xiong
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education), The Second Affiliated Hospital, Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou 310029, China; Cancer Center of Zhejiang University, Hangzhou 310029, China
| | - Yi Sun
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education), The Second Affiliated Hospital, Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou 310029, China; Cancer Center of Zhejiang University, Hangzhou 310029, China; Zhejiang Provincial Clinical Research Center for Cancer, Hangzhou 310009, China; Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang, Hangzhou, China; Research Center for Life Science and Human Health, Binjiang Institute of Zhejiang University, Hangzhou 310053, China.
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3
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Huang L, Che Z, Liu F, Ge M, Wu Z, Wu L, Chen W, Wang Z, Zhu Z, Xu W, Dong Q, Yang D. ASB3 promotes hepatocellular carcinoma progression by mediating DR5 ubiquitination in TRAIL resistance. FASEB J 2024; 38:e23475. [PMID: 38334450 DOI: 10.1096/fj.202301755r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 12/24/2023] [Accepted: 01/25/2024] [Indexed: 02/10/2024]
Abstract
Ankyrin-repeat proteins with a suppressor of cytokine signaling box (ASB) proteins belong to the E3 ubiquitin ligase family. 18 ASB members have been identified whose biological functions are mostly unexplored. Here, we discovered that ASB3 was essential for hepatocellular carcinoma (HCC) development and high ASB3 expression predicted poor clinical outcomes. ASB3 silencing induced HCC cell growth arrest and apoptosis in vitro and in vivo. Liver-specific deletion of Asb3 gene suppressed diethylnitrosamine (DEN)-induced liver cancer development. Mechanistically, ASB3 interacted with death receptor 5 (DR5), which promoted ubiquitination and degradation of DR5. We further showed that ASB3 knockdown stabilized DR5 and increased the sensitivity of liver cancer cells to the treatment of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) in a DR5-dependent manner in cellular and in animal models. In summary, we demonstrated that ASB3 promoted ubiquitination and degradation of DR5 in HCC, suggesting the potential of targeting ASB3 to HCC treatment and overcome TRAIL resistance.
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Affiliation(s)
- Linlin Huang
- Central Laboratory, Huashan Hospital, Fudan University, Shanghai, China
- Department of Laboratory Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Zhihui Che
- Central Laboratory, Huashan Hospital, Fudan University, Shanghai, China
| | - Fuchen Liu
- The Third Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - Mengxiao Ge
- Central Laboratory, Huashan Hospital, Fudan University, Shanghai, China
| | - Zhaohui Wu
- Cullgen Inc., San Diego, California, USA
| | - Lijun Wu
- Fudan University Library, Shanghai, China
| | - Wenwen Chen
- Central Laboratory, Huashan Hospital, Fudan University, Shanghai, China
| | - Zuoyun Wang
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Zhiling Zhu
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, China
| | - Wei Xu
- Department of Immunology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Qiongzhu Dong
- Key Laboratory of Whole-period Monitoring and Precise Intervention of Digestive Cancer, Shanghai Municipal Health Commission (SMHC), Minhang Hospital, Fudan University, Shanghai, China
| | - Dongqin Yang
- Central Laboratory, Huashan Hospital, Fudan University, Shanghai, China
- Department of Laboratory Medicine, Huashan Hospital, Fudan University, Shanghai, China
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4
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Mebratu YA, Jones JT, Liu C, Negasi ZH, Rahman M, Rojas-Quintero J, O’Connor GT, Gao W, Dupuis J, Cho MH, Litonjua AA, Randell S, Tesfaigzi Y. Bik promotes proteasomal degradation to control low-grade inflammation. J Clin Invest 2023; 134:e170594. [PMID: 38113109 PMCID: PMC10866658 DOI: 10.1172/jci170594] [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: 03/20/2023] [Accepted: 12/13/2023] [Indexed: 12/21/2023] Open
Abstract
Although chronic low-grade inflammation does not cause immediate clinical symptoms, over the longer term, it can enhance other insults or age-dependent damage to organ systems and thereby contribute to age-related disorders, such as respiratory disorders, heart disease, metabolic disorders, autoimmunity, and cancer. However, the molecular mechanisms governing low-level inflammation are largely unknown. We discovered that Bcl-2-interacting killer (Bik) deficiency causes low-level inflammation even at baseline and the development of spontaneous emphysema in female but not male mice. Similarly, a single nucleotide polymorphism that reduced Bik levels was associated with increased inflammation and enhanced decline in lung function in humans. Transgenic expression of Bik in the airways of Bik-deficient mice inhibited allergen- or LPS-induced lung inflammation and reversed emphysema in female mice. Bik deficiency increased nuclear but not cytosolic p65 levels because Bik, by modifying the BH4 domain of Bcl-2, interacted with regulatory particle non-ATPase 1 (RPN1) and RPN2 and enhanced proteasomal degradation of nuclear proteins. Bik deficiency increased inflammation primarily in females because Bcl-2 and Bik levels were reduced in lung tissues and airway cells of female compared with male mice. Therefore, controlling low-grade inflammation by modifying the unappreciated role of Bik and Bcl-2 in facilitating proteasomal degradation of nuclear proteins may be crucial in treating chronic age-related diseases.
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Affiliation(s)
- Yohannes A. Mebratu
- Brigham and Women’s Hospital, Division of Pulmonary and Critical Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Jane T. Jones
- University Geisel School of Medicine, Department of Microbiology and Immunology, Dartmouth, Hanover, New Hampshire, USA
| | - Congjian Liu
- Brigham and Women’s Hospital, Division of Pulmonary and Critical Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Zerihun H. Negasi
- Brigham and Women’s Hospital, Division of Pulmonary and Critical Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Mizanur Rahman
- Brigham and Women’s Hospital, Division of Pulmonary and Critical Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Joselyn Rojas-Quintero
- Brigham and Women’s Hospital, Division of Pulmonary and Critical Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - George T. O’Connor
- Pulmonary Center, Boston University School of Medicine, Boston, Massachusetts, USA
- National Heart, Lung, and Blood Institute’s (NHLBI’s) Framingham Heart Study, Framingham, Massachusetts, USA
| | - Wei Gao
- Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts, USA
| | - Josée Dupuis
- Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts, USA
- Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Canada
| | - Michael H. Cho
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Boston, Massachusetts, USA
| | - Augusto A. Litonjua
- Division of Pediatric Pulmonary Medicine, University of Rochester Medical Center, Rochester, New York, USA
| | - Scott Randell
- Marsico Lung Institute, UNC School of Medicine, Chapel Hill, North Carolina, USA
| | - Yohannes Tesfaigzi
- Brigham and Women’s Hospital, Division of Pulmonary and Critical Medicine, Harvard Medical School, Boston, Massachusetts, USA
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5
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Chou MC, Wang YH, Chen FY, Kung CY, Wu KP, Kuo JC, Chan SJ, Cheng ML, Lin CY, Chou YC, Ho MC, Firestine S, Huang JR, Chen RH. PAICS ubiquitination recruits UBAP2 to trigger phase separation for purinosome assembly. Mol Cell 2023; 83:4123-4140.e12. [PMID: 37848033 DOI: 10.1016/j.molcel.2023.09.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 07/10/2023] [Accepted: 09/22/2023] [Indexed: 10/19/2023]
Abstract
Purinosomes serve as metabolons to enhance de novo purine synthesis (DNPS) efficiency through compartmentalizing DNPS enzymes during stressed conditions. However, the mechanism underpinning purinosome assembly and its pathophysiological functions remains elusive. Here, we show that K6-polyubiquitination of the DNPS enzyme phosphoribosylaminoimidazole carboxylase and phosphoribosylaminoimidazolesuccinocarboxamide synthetase (PAICS) by cullin-5/ankyrin repeat and SOCS box containing 11 (Cul5/ASB11)-based ubiquitin ligase plays a driving role in purinosome assembly. Upon several purinosome-inducing cues, ASB11 is upregulated by relieving the H3K9me3/HP1α-mediated transcriptional silencing, thus stimulating PAICS polyubiquitination. The polyubiquitinated PAICS recruits ubiquitin-associated protein 2 (UBAP2), a ubiquitin-binding protein with multiple stretches of intrinsically disordered regions, thereby inducing phase separation to trigger purinosome assembly for enhancing DNPS pathway flux. In human melanoma, ASB11 is highly expressed to facilitate a constitutive purinosome formation to which melanoma cells are addicted for supporting their proliferation, viability, and tumorigenesis in a xenograft model. Our study identifies a driving mechanism for purinosome assembly in response to cellular stresses and uncovers the impact of purinosome formation on human malignancies.
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Affiliation(s)
- Ming-Chieh Chou
- Institute of Biological Chemistry, Academia Sinica, Taipei 115, Taiwan; Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei 106, Taiwan
| | - Yi-Hsuan Wang
- Institute of Biological Chemistry, Academia Sinica, Taipei 115, Taiwan; Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei 106, Taiwan
| | - Fei-Yun Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei 115, Taiwan
| | - Chun-Ying Kung
- Institute of Biological Chemistry, Academia Sinica, Taipei 115, Taiwan; Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei 106, Taiwan
| | - Kuen-Phon Wu
- Institute of Biological Chemistry, Academia Sinica, Taipei 115, Taiwan; Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei 106, Taiwan
| | - Jean-Cheng Kuo
- Institute of Biochemistry and Molecular Biology, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
| | - Shu-Jou Chan
- Institute of Biological Chemistry, Academia Sinica, Taipei 115, Taiwan
| | - Mei-Ling Cheng
- Metabolomics Core Laboratory, Healthy Aging Research Center, Chang Gung University, Taoyuan 333, Taiwan; Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan; Clinical Metabolomics Core Laboratory, Chang Gung Memorial Hospital at Linkou, Taoyuan 333, Taiwan
| | - Chih-Yu Lin
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Yu-Chi Chou
- Biomedical Translation Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Meng-Chiao Ho
- Institute of Biological Chemistry, Academia Sinica, Taipei 115, Taiwan; Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei 106, Taiwan
| | - Steven Firestine
- Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, MI 48201, USA
| | - Jie-Rong Huang
- Institute of Biochemistry and Molecular Biology, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
| | - Ruey-Hwa Chen
- Institute of Biological Chemistry, Academia Sinica, Taipei 115, Taiwan; Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei 106, Taiwan.
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6
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Liu Y, Qiao Y, Pan S, Chen J, Mao Z, Ren K, Yang Y, Feng Q, Liu D, Liu Z. Broadening horizons: the contribution of mitochondria-associated endoplasmic reticulum membrane (MAM) dysfunction in diabetic kidney disease. Int J Biol Sci 2023; 19:4427-4441. [PMID: 37781026 PMCID: PMC10535705 DOI: 10.7150/ijbs.86608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 08/15/2023] [Indexed: 10/03/2023] Open
Abstract
Diabetic kidney disease (DKD) is a global health issue that presents a complex pathogenesis and limited treatment options. To provide guidance for precise therapies, it is crucial to accurately identify the pathogenesis of DKD. Several studies have recognized that mitochondrial and endoplasmic reticulum (ER) dysfunction are key drivers of the pathogenesis of DKD. The mitochondria-associated ER membrane (MAM) is a dynamic membrane contact site (MSC) that connects the ER and mitochondria and is essential in maintaining the normal function of the two organelles. MAM is involved in various cellular processes, including lipid synthesis and transport, calcium homeostasis, mitochondrial fusion and fission, and ER stress. Meanwhile, recent studies confirm that MAM plays a significant role in the pathogenesis of DKD by regulating glucose metabolism, lipid metabolism, inflammation, ER stress, mitochondrial fission and fusion, and autophagy. Herein, this review aims to provide a comprehensive summary of the physiological function of MAMs and their impact on the progression of DKD. Subsequently, we discuss the trend of pharmaceutical studies that target MAM resident proteins for treating DKD. Furthermore, we also explore the future development prospects of MAM in DKD research, thereby providing a new perspective for basic studies and clinical treatment of DKD.
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Affiliation(s)
- Yong Liu
- Research Institute of Nephrology, Zhengzhou University, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
- Traditional Chinese Medicine Integrated Department of Nephrology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
- Henan Province Research Center for Kidney Disease, Zhengzhou 450052, P. R. China
- Key Laboratory of Precision Diagnosis and Treatment for Chronic Kidney Disease in Henan Province, Zhengzhou 450052, P. R. China
| | - Yingjin Qiao
- Blood Purification Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
| | - Shaokang Pan
- Research Institute of Nephrology, Zhengzhou University, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
- Traditional Chinese Medicine Integrated Department of Nephrology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
- Henan Province Research Center for Kidney Disease, Zhengzhou 450052, P. R. China
- Key Laboratory of Precision Diagnosis and Treatment for Chronic Kidney Disease in Henan Province, Zhengzhou 450052, P. R. China
| | - Jingfang Chen
- Research Institute of Nephrology, Zhengzhou University, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
- Traditional Chinese Medicine Integrated Department of Nephrology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
- Henan Province Research Center for Kidney Disease, Zhengzhou 450052, P. R. China
- Key Laboratory of Precision Diagnosis and Treatment for Chronic Kidney Disease in Henan Province, Zhengzhou 450052, P. R. China
| | - Zihui Mao
- Research Institute of Nephrology, Zhengzhou University, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
- Traditional Chinese Medicine Integrated Department of Nephrology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
- Henan Province Research Center for Kidney Disease, Zhengzhou 450052, P. R. China
- Key Laboratory of Precision Diagnosis and Treatment for Chronic Kidney Disease in Henan Province, Zhengzhou 450052, P. R. China
| | - Kaidi Ren
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
| | - Yang Yang
- Clinical Systems Biology Laboratories, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, P. R. China
| | - Qi Feng
- Research Institute of Nephrology, Zhengzhou University, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
- Traditional Chinese Medicine Integrated Department of Nephrology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
- Henan Province Research Center for Kidney Disease, Zhengzhou 450052, P. R. China
- Key Laboratory of Precision Diagnosis and Treatment for Chronic Kidney Disease in Henan Province, Zhengzhou 450052, P. R. China
| | - Dongwei Liu
- Research Institute of Nephrology, Zhengzhou University, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
- Traditional Chinese Medicine Integrated Department of Nephrology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
- Henan Province Research Center for Kidney Disease, Zhengzhou 450052, P. R. China
- Key Laboratory of Precision Diagnosis and Treatment for Chronic Kidney Disease in Henan Province, Zhengzhou 450052, P. R. China
| | - Zhangsuo Liu
- Research Institute of Nephrology, Zhengzhou University, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
- Traditional Chinese Medicine Integrated Department of Nephrology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China
- Henan Province Research Center for Kidney Disease, Zhengzhou 450052, P. R. China
- Key Laboratory of Precision Diagnosis and Treatment for Chronic Kidney Disease in Henan Province, Zhengzhou 450052, P. R. China
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7
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Hu R, Yao C, Li Y, Qu J, Yu S, Han Y, Chen G, Tang J, Wei H. Polystyrene nanoplastics promote CHIP-mediated degradation of tight junction proteins by activating IRE1α/XBP1s pathway in mouse Sertoli cells. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 248:114332. [PMID: 36446169 DOI: 10.1016/j.ecoenv.2022.114332] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 11/15/2022] [Accepted: 11/22/2022] [Indexed: 06/16/2023]
Abstract
Microplastics (MPs) and nanoplastics (NPs) widely exist in human living environment and enter the body through water, food chain and breathing. Several studies have shown that MPs or NPs disrupt the blood-testis barrier in rodents. However, the molecular mechanism by which MPs and NPs damage the blood-testis barrier remains unclear. In the present study, our aim was to investigate the molecular mechanism of the destruction of blood-testis barrier induced by polystyrene (PS)-NPs. Mice were treated with 50 μg/kg·day PS-NPs by tail vein injection once daily for two consecutive days. The results showed that PS-NPs exposure significantly decreased the levels of tight junction (TJ) proteins ZO-2, occludin and claudin-11 in testis of mice. In vitro, we used TM4 Sertoli cells to explore the underlying mechanism of the decrease in TJ proteins induced by PS-NPs. We found that PS-NPs activated IRE1α and induced its downstream XBP1 splicing, which in turn elevated the expression of the E3 ubiquitin ligase CHIP, then CHIP triggers proteasomal degradation of ZO-2, occludin, and claudin-11 proteins. Our findings suggest that IRE1α/XBP1s/CHIP pathway is a pivotal mechanism of TJ proteins degradation induced by PS-NPs in mouse Sertoli cells. In conclusion, our results reveal that the degradation of TJ proteins is one of the mechanisms of blood-testis barrier destruction caused by acute exposure to PS-NPs.
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Affiliation(s)
- Runzhi Hu
- Department of Occupational Medicine and Environmental Toxicology, College of Public Health, Nantong University, Nantong, Jiangsu 226019, China
| | - Chenjuan Yao
- Department of Molecular Oral Physiology, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima-Shi, Tokushima 770-8504, Japan
| | - Yanli Li
- Department of Occupational Medicine and Environmental Toxicology, College of Public Health, Nantong University, Nantong, Jiangsu 226019, China
| | - Jianhua Qu
- Department of Occupational Medicine and Environmental Toxicology, College of Public Health, Nantong University, Nantong, Jiangsu 226019, China
| | - Shali Yu
- Department of Occupational Medicine and Environmental Toxicology, College of Public Health, Nantong University, Nantong, Jiangsu 226019, China
| | - Yu Han
- Department of Occupational Medicine and Environmental Toxicology, College of Public Health, Nantong University, Nantong, Jiangsu 226019, China
| | - Gang Chen
- Department of Occupational Medicine and Environmental Toxicology, College of Public Health, Nantong University, Nantong, Jiangsu 226019, China.
| | - Juan Tang
- Department of Occupational Medicine and Environmental Toxicology, College of Public Health, Nantong University, Nantong, Jiangsu 226019, China.
| | - Haiyan Wei
- Department of Occupational Medicine and Environmental Toxicology, College of Public Health, Nantong University, Nantong, Jiangsu 226019, China.
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8
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Zheng J, Cao Y, Yang J, Jiang H. UBXD8 mediates mitochondria-associated degradation to restrain apoptosis and mitophagy. EMBO Rep 2022; 23:e54859. [PMID: 35979733 PMCID: PMC9535754 DOI: 10.15252/embr.202254859] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 07/20/2022] [Accepted: 08/04/2022] [Indexed: 08/08/2023] Open
Abstract
The hexameric AAA-ATPase valosin-containing protein (VCP) is essential for mitochondrial protein quality control. How VCP is recruited to mammalian mitochondria remains obscure. Here we report that UBXD8, an ER- and lipid droplet-localized VCP adaptor, also localizes to mitochondria and locally recruits VCP. UBXD8 associates with mitochondrial and ER ubiquitin E3 ligases and targets their substrates for degradation. Remarkably, both mitochondria- and ER-localized UBXD8 can degrade mitochondrial and ER substrates in cis and in trans. UBXD8 also associates with the TOM complex but is dispensable for translocation-associated degradation. UBXD8 knockout impairs the degradation of the pro-survival protein Mcl1 but surprisingly sensitizes cells to apoptosis and mitochondrial stresses. UBXD8 knockout also hyperactivates mitophagy. We identify pro-apoptotic BH3-only proteins Noxa, Bik, and Bnip3 as novel UBXD8 substrates and determine that UBXD8 inhibits apoptosis via degrading Noxa and restrains mitophagy via degrading Bnip3. Collectively, our characterizations reveal UBXD8 as the major mitochondrial adaptor of VCP and unveil its role in apoptosis and mitophagy regulation.
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Affiliation(s)
- Jing Zheng
- School of Life SciencesPeking UniversityBeijingChina
- National Institute of Biological SciencesBeijingChina
- Beijing Key Laboratory of Cell Biology for Animal AgingBeijingChina
| | - Yu Cao
- National Institute of Biological SciencesBeijingChina
- Beijing Key Laboratory of Cell Biology for Animal AgingBeijingChina
- College of Life SciencesBeijing Normal UniversityBeijingChina
| | - Jun Yang
- National Institute of Biological SciencesBeijingChina
- Beijing Key Laboratory of Cell Biology for Animal AgingBeijingChina
- School of Life SciencesTsinghua UniversityBeijingChina
| | - Hui Jiang
- School of Life SciencesPeking UniversityBeijingChina
- National Institute of Biological SciencesBeijingChina
- Beijing Key Laboratory of Cell Biology for Animal AgingBeijingChina
- Tsinghua Institute of Multidisciplinary Biomedical ResearchTsinghua UniversityBeijingChina
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9
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Wan P, Yang G, Zhang S, Zhang Y, Jia Y, Che X, Luo Z, Pan P, Li G, Chen X, Zhang Q, Zhang W, Tan Q, Li Y, Wu J. ASB17 Facilitates the Burst of LPS-Induced Inflammation Through Maintaining TRAF6 Stability. Front Cell Infect Microbiol 2022; 12:759077. [PMID: 35174103 PMCID: PMC8842666 DOI: 10.3389/fcimb.2022.759077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 01/06/2022] [Indexed: 11/13/2022] Open
Abstract
ASB17, a member of the ankyrin repeat and SOCS box-containing protein (ASB) family, has been supposed to act as an E3 ubiquitin ligase. Actually, little is known about its biological function. In this study, we found that ASB17 knocking-out impaired the expression of the pro-inflammatory cytokines CCL2 and IL-6 in bone marrow-derived dendritic cells (BMDCs) stimulated by lipopolysaccharide (LPS), indicating an inflammation-promoting role of this gene. We reveal that ASB17 promotes LPS-induced nuclear factor kappa B (NF-κB) signal activation through interacting with TNF receptor-associated factor 6 (TRAF6) which is a crucial adaptor protein downstream of toll-like receptors (TLR). ASB17 via its aa177-250 segment interacts with the Zn finger domain of TRAF6. The interaction of ASB17 stabilizes TRAF6 protein through inhibiting K48-linked TRAF6 polyubiquitination. Therefore, we suggest that ASB17 facilitates LPS-induced NF-κB activation by maintaining TRAF6 protein stability. The inflammation enhancer role of ASB17 is recognized here, which provides new understanding of the activation process of inflammation and immune response.
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Affiliation(s)
- Pin Wan
- Guangdong Provincial Key Laboratory of Virology, Institute of Medical Microbiology, Jinan University, Guangzhou, China
| | - Ge Yang
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Simeng Zhang
- Guangdong Provincial Key Laboratory of Virology, Institute of Medical Microbiology, Jinan University, Guangzhou, China
| | - Yaru Zhang
- Guangdong Provincial Key Laboratory of Virology, Institute of Medical Microbiology, Jinan University, Guangzhou, China
| | - Yaling Jia
- Guangdong Provincial Key Laboratory of Virology, Institute of Medical Microbiology, Jinan University, Guangzhou, China
| | - Xu Che
- Guangdong Provincial Key Laboratory of Virology, Institute of Medical Microbiology, Jinan University, Guangzhou, China
| | - Zhen Luo
- Guangdong Provincial Key Laboratory of Virology, Institute of Medical Microbiology, Jinan University, Guangzhou, China
- Foshan Institute of Medical Microbiology, Foshan, China
| | - Pan Pan
- The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China
| | - Geng Li
- Guangdong Provincial Key Laboratory of Virology, Institute of Medical Microbiology, Jinan University, Guangzhou, China
- Foshan Institute of Medical Microbiology, Foshan, China
| | - Xulin Chen
- Guangdong Provincial Key Laboratory of Virology, Institute of Medical Microbiology, Jinan University, Guangzhou, China
- Foshan Institute of Medical Microbiology, Foshan, China
| | - Qiwei Zhang
- Guangdong Provincial Key Laboratory of Virology, Institute of Medical Microbiology, Jinan University, Guangzhou, China
- Foshan Institute of Medical Microbiology, Foshan, China
| | - Wen Zhang
- Guangdong Longfan Biological Science and Technology, Foshan, China
| | - Qiuping Tan
- Guangdong Longfan Biological Science and Technology, Foshan, China
| | - Yongkui Li
- Guangdong Provincial Key Laboratory of Virology, Institute of Medical Microbiology, Jinan University, Guangzhou, China
- Foshan Institute of Medical Microbiology, Foshan, China
| | - Jianguo Wu
- Guangdong Provincial Key Laboratory of Virology, Institute of Medical Microbiology, Jinan University, Guangzhou, China
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
- Foshan Institute of Medical Microbiology, Foshan, China
- The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China
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10
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Borden ES, Adams AC, Buetow KH, Wilson MA, Bauman JE, Curiel-Lewandrowski C, Chow HHS, LaFleur BJ, Hastings KT. Shared Gene Expression and Immune Pathway Changes Associated with Progression from Nevi to Melanoma. Cancers (Basel) 2021; 14:cancers14010003. [PMID: 35008167 PMCID: PMC8749980 DOI: 10.3390/cancers14010003] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 12/16/2021] [Accepted: 12/20/2021] [Indexed: 02/07/2023] Open
Abstract
Simple Summary Melanoma is a deadly skin cancer, and the incidence of melanoma is rising. Chemoprevention, using small molecule drugs to prevent the development of cancer, is a key strategy that could reduce the burden of melanoma on society. The long-term goal of our study is to develop a gene signature biomarker of progression from nevi to melanoma. We found that a small number of genes can distinguish nevi from melanoma and identified shared genes and immune-related pathways that are associated with progression from nevi to melanoma across independent datasets. This study demonstrates (1) a novel approach to aid melanoma chemoprevention trials by using a gene signature as a surrogate endpoint and (2) the feasibility of determining a gene signature biomarker of melanoma progression. Abstract There is a need to identify molecular biomarkers of melanoma progression to assist the development of chemoprevention strategies to lower melanoma incidence. Using datasets containing gene expression for dysplastic nevi and melanoma or melanoma arising in a nevus, we performed differential gene expression analysis and regularized regression models to identify genes and pathways that were associated with progression from nevi to melanoma. A small number of genes distinguished nevi from melanoma. Differential expression of seven genes was identified between nevi and melanoma in three independent datasets. C1QB, CXCL9, CXCL10, DFNA5 (GSDME), FCGR1B, and PRAME were increased in melanoma, and SCGB1D2 was decreased in melanoma, compared to dysplastic nevi or nevi that progressed to melanoma. Further supporting an association with melanomagenesis, these genes demonstrated a linear change in expression from benign nevi to dysplastic nevi to radial growth phase melanoma to vertical growth phase melanoma. The genes associated with melanoma progression showed significant enrichment of multiple pathways related to the immune system. This study demonstrates (1) a novel application of bioinformatic approaches to aid clinical trials of melanoma chemoprevention and (2) the feasibility of determining a gene signature biomarker of melanomagenesis.
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Affiliation(s)
- Elizabeth S. Borden
- Department of Basic Medical Sciences, University of Arizona College of Medicine Phoenix, Phoenix, AZ 85004, USA; (E.S.B.); (A.C.A.)
- Phoenix Veterans Affairs Health Care System, Phoenix, AZ 85012, USA
| | - Anngela C. Adams
- Department of Basic Medical Sciences, University of Arizona College of Medicine Phoenix, Phoenix, AZ 85004, USA; (E.S.B.); (A.C.A.)
- Phoenix Veterans Affairs Health Care System, Phoenix, AZ 85012, USA
| | - Kenneth H. Buetow
- School of Life Sciences, Arizona State University, Tempe, AZ 85281, USA; (K.H.B.); (M.A.W.)
- Center for Evolution and Medicine, Arizona State University, Tempe, AZ 85281, USA
| | - Melissa A. Wilson
- School of Life Sciences, Arizona State University, Tempe, AZ 85281, USA; (K.H.B.); (M.A.W.)
- Center for Evolution and Medicine, Arizona State University, Tempe, AZ 85281, USA
| | - Julie E. Bauman
- Department of Medicine, University of Arizona College of Medicine Tucson, Tucson, AZ 85724, USA; (J.E.B.); (C.C.-L.); (H.-H.S.C.)
- University of Arizona Cancer Center, University of Arizona, Tucson, AZ 85724, USA
| | - Clara Curiel-Lewandrowski
- Department of Medicine, University of Arizona College of Medicine Tucson, Tucson, AZ 85724, USA; (J.E.B.); (C.C.-L.); (H.-H.S.C.)
- University of Arizona Cancer Center, University of Arizona, Tucson, AZ 85724, USA
| | - H.-H. Sherry Chow
- Department of Medicine, University of Arizona College of Medicine Tucson, Tucson, AZ 85724, USA; (J.E.B.); (C.C.-L.); (H.-H.S.C.)
- University of Arizona Cancer Center, University of Arizona, Tucson, AZ 85724, USA
| | | | - Karen Taraszka Hastings
- Department of Basic Medical Sciences, University of Arizona College of Medicine Phoenix, Phoenix, AZ 85004, USA; (E.S.B.); (A.C.A.)
- Phoenix Veterans Affairs Health Care System, Phoenix, AZ 85012, USA
- University of Arizona Cancer Center, University of Arizona, Tucson, AZ 85724, USA
- Correspondence: ; Tel.: +1-602-827-2106
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11
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E3 Ubiquitin Ligase ASB17 Promotes Apoptosis by Ubiquitylating and Degrading BCLW and MCL1. BIOLOGY 2021; 10:biology10030234. [PMID: 33803505 PMCID: PMC8003104 DOI: 10.3390/biology10030234] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 02/26/2021] [Accepted: 03/03/2021] [Indexed: 12/26/2022]
Abstract
Simple Summary B-cell lymphoma-2 family proteins have been widely accepted as the critical regulators in cell apoptosis, often found to be abnormally expressed in many cancers. Among them, B-cell leukemia/lymphoma w and myeloid cell leukemia-1 are two pro-survival proteins. Here, we reported that the ankyrin repeat and SOCS box protein 17 can degrade the two proteins in a ubiquitylation -dependent way. Furthermore, we generated the first ASB17 knockout C57BL/6J mice line. The results revealed that ASB17 deficiency inhibited apoptosis but did not affect testes development. Moreover, the ASB17-deficient mice were more resistant to the stimuli of etoposide, Altogether, these findings indicate that ASB17 is a novel positive mediator of cell apoptosis. Abstract Apoptosis is a very important process of cell death controlled by multiple genes during which cells undergo certain events before dying. Apoptosis helps to clean the unnecessary cells and has critical physiological significance. Altered apoptosis results in a disorder of cell death and is associated with many diseases such as neurodegenerative diseases and cancers. Here, we reported that the ankyrin repeat and SOCS box protein 17 (ASB17) was mainly expressed in the testis and promoted apoptosis both in vivo and in vitro. Analyzing ASB17-deficient mice generated by using the CRISPR/Cas9 system, we demonstrated that ASB17 deficiency resulted in the reduction of apoptosis in spermatogenic cells, but it did not affect the development of spermatozoa or normal fertility. Next, in an in vivo model, ASB17 deficiency prevented the apoptosis of spermatogonia induced by etoposide in male mice. We noted that ASB17 promoted apoptosis in a caspase-dependent manner in vitro. Moreover, ASB17 interacted with the members of the BCL2 family, including BCL2, BCLX, BCLW, and MCL1. Interestingly, ASB17 specifically degraded the two anti-apoptotic factors, BCLW and MCL1, in a ubiquitylation-dependent fashion. Collectively, our findings suggested that ASB17 acted as a distinct positive regulator of cell apoptosis.
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12
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Deng J, Bai X, Tang H, Pang S. DNA damage promotes ER stress resistance through elevation of unsaturated phosphatidylcholine in Caenorhabditis elegans. J Biol Chem 2021; 296:100095. [PMID: 33208465 PMCID: PMC7949029 DOI: 10.1074/jbc.ra120.016083] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 11/10/2020] [Accepted: 11/18/2020] [Indexed: 01/04/2023] Open
Abstract
DNA damage triggers the cellular adaptive response to arrest proliferation and repair DNA damage; when damage is too severe to be repaired, apoptosis is initiated to prevent the spread of genomic insults. However, how cells endure DNA damage to maintain cell function remains largely unexplored. By using Caenorhabditis elegans as a model, we report that DNA damage elicits cell maintenance programs, including the unfolded protein response of the endoplasmic reticulum (UPRER). Mechanistically, sublethal DNA damage unexpectedly suppresses apoptotic genes in C. elegans, which in turn increases the activity of the inositol-requiring enzyme 1/X-box binding protein 1 (IRE-1/XBP-1) branch of the UPRER by elevating unsaturated phosphatidylcholine. In addition, UPRER activation requires silencing of the lipid regulator skinhead-1 (SKN-1). DNA damage suppresses SKN-1 activity to increase unsaturated phosphatidylcholine and activate UPRER. These findings reveal the UPRER activation as an organismal adaptive response that is important to maintain cell function during DNA damage.
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Affiliation(s)
- Jianhui Deng
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Xue Bai
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Haiqing Tang
- School of Life Sciences, Chongqing University, Chongqing, China.
| | - Shanshan Pang
- School of Life Sciences, Chongqing University, Chongqing, China.
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13
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When Endoplasmic Reticulum Proteostasis Meets the DNA Damage Response. Trends Cell Biol 2020; 30:881-891. [PMID: 33036871 DOI: 10.1016/j.tcb.2020.09.002] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 08/31/2020] [Accepted: 09/07/2020] [Indexed: 02/06/2023]
Abstract
Sustaining both proteome and genome integrity (GI) requires the integration of a wide range of mechanisms and signaling pathways. These comprise, in particular, the unfolded protein response (UPR) and the DNA damage response (DDR). These adaptive mechanisms take place respectively in the endoplasmic reticulum (ER) and in the nucleus. UPR and DDR alterations are associated with aging and with pathologies such as degenerative diseases, metabolic and inflammatory disorders, and cancer. We discuss the emerging signaling crosstalk between UPR stress sensors and the DDR, as well as their involvement in cancer biology.
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14
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Endoplasmic reticulum stress and protein degradation in chronic liver disease. Pharmacol Res 2020; 161:105218. [PMID: 33007418 DOI: 10.1016/j.phrs.2020.105218] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/21/2020] [Accepted: 09/21/2020] [Indexed: 02/07/2023]
Abstract
Endoplasmic reticulum (ER) stress is easily observed in chronic liver disease, which often causes accumulation of unfolded or misfolded proteins in the ER, leading to unfolded protein response (UPR). Regulating protein degradation is an integral part of UPR to relieve ER stress. The major protein degradation system includes the ubiquitin-proteasome system (UPS) and autophagy. All three arms of UPR triggered in response to ER stress can regulate UPS and autophagy. Accumulated misfolded proteins could activate these arms, and then generate various transcription factors to regulate the expression of UPS-related and autophagy-related genes. The protein degradation process regulated by UPR has great significance in many chronic liver diseases, including non-alcoholic fatty liver disease (NAFLD), alcoholic liver disease (ALD), viral hepatitis, liver fibrosis, and hepatocellular carcinoma(HCC). In most instances, the degradation of excessive proteins protects cells with ER stress survival from apoptosis. According to the specific functions of protein degradation in chronic liver disease, choosing to promote or inhibit this process is promising as a potential method for treating chronic liver disease.
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15
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Zhang C, Wei Y, Xu L, Wu KC, Yang L, Shi CN, Yang GY, Chen D, Yu FF, Xie Q, Ding SW, Wu JG. A Bunyavirus-Inducible Ubiquitin Ligase Targets RNA Polymerase IV for Degradation during Viral Pathogenesis in Rice. MOLECULAR PLANT 2020; 13:836-850. [PMID: 32087369 DOI: 10.1016/j.molp.2020.02.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 01/18/2020] [Accepted: 02/14/2020] [Indexed: 05/19/2023]
Abstract
The ubiquitin-proteasome system (UPS) is an important post-translational regulatory mechanism that controls many cellular functions in eukaryotes. Here, we show that stable expression of P3 protein encoded by Rice grassy stunt virus (RGSV), a negative-strand RNA virus in the Bunyavirales, causes developmental abnormities similar to the disease symptoms caused by RGSV, such as dwarfing and excess tillering, in transgenic rice plants. We found that both transgenic expression of P3 and RGSV infection induce ubiquitination and UPS-dependent degradation of rice NUCLEAR RNA POLYMERASE D1a (OsNRPD1a), one of two orthologs of the largest subunit of plant-specific RNA polymerase IV (Pol IV), which is required for RNA-directed DNA methylation (RdDM). Furthermore, we identified a P3-inducible U-box type E3 ubiquitin ligase, designated as P3-inducible protein 1 (P3IP1), which interacts with OsNRPD1a and mediates its ubiquitination and UPS-dependent degradation in vitro and in vivo. Notably, both knockdown of OsNRPD1 and overexpression of P3IP1 in rice plants induced developmental phenotypes similar to RGSV disease symptomss. Taken together, our findings reveal a novel virulence mechanism whereby plant pathogens target host RNA Pol IV for UPS-dependent degradation to induce disease symptoms. Our study also identified an E3 ubiquitin ligase, which targets the RdDM compotent NRPD1 for UPS-mediated degradation in rice.
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Affiliation(s)
- Chao Zhang
- Vector-borne Virus Research Center, Key Laboratory of Plant Virology of Fujian Province, Institute of Plant Virology, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Ying Wei
- Vector-borne Virus Research Center, Key Laboratory of Plant Virology of Fujian Province, Institute of Plant Virology, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Le Xu
- Center for Plant Biology, Tsinghua-Peking Center for Life Sciences, College of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Kang-Cheng Wu
- Vector-borne Virus Research Center, Key Laboratory of Plant Virology of Fujian Province, Institute of Plant Virology, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Liang Yang
- Vector-borne Virus Research Center, Key Laboratory of Plant Virology of Fujian Province, Institute of Plant Virology, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Chao-Nan Shi
- Vector-borne Virus Research Center, Key Laboratory of Plant Virology of Fujian Province, Institute of Plant Virology, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Guo-Yi Yang
- Vector-borne Virus Research Center, Key Laboratory of Plant Virology of Fujian Province, Institute of Plant Virology, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Dong Chen
- Vector-borne Virus Research Center, Key Laboratory of Plant Virology of Fujian Province, Institute of Plant Virology, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Fei-Fei Yu
- State Key Laboratory of Plant Genomics, National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Qi Xie
- State Key Laboratory of Plant Genomics, National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Shou-Wei Ding
- Department of Microbiology and Plant Pathology and Center for Plant Cell Biology, Institute for Integrative Genome Biology, University of California, Riverside, CA, 92521, USA
| | - Jian-Guo Wu
- Vector-borne Virus Research Center, Key Laboratory of Plant Virology of Fujian Province, Institute of Plant Virology, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
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16
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Zhao Y, Xiong X, Sun Y. Cullin-RING Ligase 5: Functional characterization and its role in human cancers. Semin Cancer Biol 2020; 67:61-79. [PMID: 32334051 DOI: 10.1016/j.semcancer.2020.04.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 04/06/2020] [Accepted: 04/12/2020] [Indexed: 12/12/2022]
Abstract
Cullin-RING ligase 5 (CRL5) is a multi-protein complex and consists of a scaffold protien cullin 5, a RING protein RBX2 (also known as ROC2 or SAG), adaptor proteins Elongin B/C, and a substrate receptor protein SOCS. Through targeting a variety of substrates for proteasomal degradation or modulating various protein-protein interactions, CRL5 is involved in regulation of many biological processes, such as cytokine signal transduction, inflammation, viral infection, and oncogenesis. As many substrates of CRL5 are well-known oncoproteins or tumor suppressors, abnormal regulation of CRL5 is commonly found in human cancers. In this review, we first briefly introduce each of CRL5 components, and then discuss the biological processes regulated by four members of SOCS-box-containing substrate receptor family through substrate degradation. We next describe how CRL5 is hijacked by a variety of viral proteins to degrade host anti-viral proteins, which facilitates virus infection. We further discuss the regulation of CUL5 and its various roles in human cancers, acting as either a tumor suppressor or an oncoprotein in a context-dependent manner. Finally, we propose novel insights for future perspectives on the validation of cullin5 and other CRL5 components as potential targets, and possible targeting strategies to discover CRL5 inhibitors for anti-cancer and anti-virus therapies.
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Affiliation(s)
- Yongchao Zhao
- Key Laboratory of Combined Multi-Organ Transplantation, Ministry of Public Health, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China.
| | - Xiufang Xiong
- Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China; Cancer Institute of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yi Sun
- Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China; Cancer Institute of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Division of Radiation and Cancer Biology, Department of Radiation Oncology, University of Michigan, Ann Arbor, MI, USA.
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