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Zhao L, Gao N, Peng X, Chen L, Meng T, Jiang C, Jin J, Zhang J, Duan Q, Tian H, Weng L, Wang X, Tan X, Li Y, Qin H, Yuan J, Ge X, Deng L, Wang P. TRAF4-Mediated LAMTOR1 Ubiquitination Promotes mTORC1 Activation and Inhibits the Inflammation-Induced Colorectal Cancer Progression. Adv Sci (Weinh) 2024; 11:e2301164. [PMID: 38229144 DOI: 10.1002/advs.202301164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 11/28/2023] [Indexed: 01/18/2024]
Abstract
Mechanistic target of rapamycin complex 1 (mTORC1) is a conserved serine/threonine kinase that integrates various environmental signals to regulate cell growth and metabolism. mTORC1 activation requires tethering to lysosomes by the Ragulator-Rag complex. However, the dynamic regulation of the interaction between Ragulator and Rag guanosine triphosphatase (GTPase) remains unclear. In this study, that LAMTOR1, an essential component of Ragulator, is dynamically ubiquitinated depending on amino acid abundance is reported. It is found that the E3 ligase TRAF4 directly interacts with LAMTOR1 and catalyzes the K63-linked polyubiquitination of LAMTOR1 at K151. Ubiquitination of LAMTOR1 by TRAF4 promoted its binding to Rag GTPases and enhanced mTORC1 activation, K151R knock-in or TRAF4 knock-out blocks amino acid-induced mTORC1 activation and accelerates the development of inflammation-induced colon cancer. This study revealed that TRAF4-mediated LAMTOR1 ubiquitination is a regulatory mechanism for mTORC1 activation and provides a therapeutic target for diseases involving mTORC1 dysregulation.
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Affiliation(s)
- Linlin Zhao
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Ni Gao
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Xiaoping Peng
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Lei Chen
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Tong Meng
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
- Department of Orthopedics, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200940, P. R. China
| | - Cong Jiang
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Jiali Jin
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Jiawen Zhang
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Qiuhui Duan
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Hongling Tian
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Linjun Weng
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Xinbo Wang
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Xiao Tan
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Yaxu Li
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Huanlong Qin
- Department of Gastrointestinal Surgery, Shanghai Tenth People's Hospital, Tongji University, Shanghai, 200092, P. R. China
- Research Institute of Intestinal Diseases, Tongji University School of Medicine, Shanghai, 200092, P. R. China
| | - Jian Yuan
- Department of Biochemistry and Molecular Biology, Tongji University School of Medicine, Shanghai, 200092, P. R. China
- Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, P. R. China
| | - Xin Ge
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Lu Deng
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, P. R. China
| | - Ping Wang
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
- Department of Biochemistry and Molecular Biology, Tongji University School of Medicine, Shanghai, 200092, P. R. China
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Liao J, Qing X, Li X, Gan Y, Wang R, Han S, Li W, Song W. TRAF4 regulates ubiquitination-modulated survivin turnover and confers radioresistance. Int J Biol Sci 2024; 20:182-199. [PMID: 38164179 PMCID: PMC10750280 DOI: 10.7150/ijbs.87180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 10/09/2023] [Indexed: 01/03/2024] Open
Abstract
Nasopharyngeal carcinoma (NPC) is the most common cancer originating in the nasopharynx. Despite continuous improvement in treatment strategies, recurrence or persistence of cancer after radiotherapy is still inevitable, highlighting the need to identify therapeutic resistance factors and develop effective methods for NPC treatment. Herein, we found that TRAF4 is overexpressed in NPC cells and tissues. Knockdown TRAF4 significantly increased the radiosensitivity of NPC cells, possibly by inhibiting the Akt/Wee1/CDK1 axis, thereby suppressing survivin phosphorylation and promoting its degradation by FBXL7. TRAF4 is positively correlated with p-Akt and survivin in NPC tissues. High protein levels of TRAF4 were observed in acquired radioresistant NPC cells, and knockdown of TRAF4 overcomes radioresistant in vitro and the xenograft mouse model. Altogether, our study highlights the TRAF4-survivin axis as a potential therapeutic target for radiosensitization in NPC.
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Affiliation(s)
- Jinzhuang Liao
- Department of Radiology, The Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
- Cell Transplantation and Gene Therapy Institute, The Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
| | - Xiang Qing
- Department of Otolaryngology Head and Neck Surgery, The Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
| | - Xiaoying Li
- Department of Radiology, The Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
- Cell Transplantation and Gene Therapy Institute, The Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
| | - Yu Gan
- Department of Radiology, The Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
- Cell Transplantation and Gene Therapy Institute, The Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
| | - Ruirui Wang
- Department of Radiology, The Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
- Cell Transplantation and Gene Therapy Institute, The Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
| | - Shuangze Han
- Department of Radiology, The Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
- Cell Transplantation and Gene Therapy Institute, The Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
| | - Wei Li
- Department of Radiology, The Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
- Cell Transplantation and Gene Therapy Institute, The Third Xiangya Hospital of Central South University, Changsha, 410013, Hunan, China
| | - Wei Song
- Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, Hunan, 410005, China
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Li J, Wang C, Xiao W, Chen Y, Tu J, Wan F, Deng K, Li H. TRAF Family Member 4 Promotes Cardiac Hypertrophy Through the Activation of the AKT Pathway. J Am Heart Assoc 2023; 12:e028185. [PMID: 37642020 PMCID: PMC10547335 DOI: 10.1161/jaha.122.028185] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 05/03/2023] [Indexed: 08/31/2023]
Abstract
Background Pathological cardiac hypertrophy is a major cause of heart failure morbidity. The complex mechanism of intermolecular interactions underlying the pathogenesis of cardiac hypertrophy has led to a lack of development and application of therapeutic methods. Methods and Results Our study provides the first evidence that TRAF4, a member of the tumor necrosis factor receptor-associated factor (TRAF) family, acts as a promoter of cardiac hypertrophy. Here, Western blotting assays demonstrated that TRAF4 is upregulated in cardiac hypertrophy. Additionally, TRAF4 deletion inhibits the development of cardiac hypertrophy in a mouse model after transverse aortic constriction surgery, whereas its overexpression promotes phenylephrine stimulation-induced cardiomyocyte hypertrophy in primary neonatal rat cardiomyocytes. Mechanistically, RNA-seq analysis revealed that TRAF4 promoted the activation of the protein kinase B pathway during cardiac hypertrophy. Moreover, we found that inhibition of protein kinase B phosphorylation rescued the aggravated cardiomyocyte hypertrophic phenotypes caused by TRAF4 overexpression in phenylephrine-treated neonatal rat cardiomyocytes, suggesting that TRAF4 may regulate cardiac hypertrophy in a protein kinase B-dependent manner. Conclusions Our results revealed the regulatory function of TRAF4 in cardiac hypertrophy, which may provide new insights into developing therapeutic and preventive targets for this disease.
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Affiliation(s)
- Jian Li
- Department of Thoracic and Cardiovascular SurgeryHuanggang Central Hospital of Yangtze UniversityHuanggangChina
| | - Chang‐Quan Wang
- Department of NeurologyHuanggang Central Hospital of Yangtze UniversityHuanggangChina
| | - Wen‐Chang Xiao
- Department of Cardiovascular SurgeryHuanggang Central Hospital of Yangtze UniversityHuanggangChina
- Huanggang Institute of Translational MedicineHuanggangChina
| | - Yun Chen
- Clinical Trial CentersHuanggang Central Hospital of Yangtze UniversityHuanggangChina
| | - Jun Tu
- Huanggang Institute of Translational MedicineHuanggangChina
| | - Feng Wan
- Department of NeurologyHuanggang Central Hospital of Yangtze UniversityHuanggangChina
- Huanggang Institute of Translational MedicineHuanggangChina
| | - Ke‐Qiong Deng
- Huanggang Institute of Translational MedicineHuanggangChina
- Department of CardiologyZhongnan Hospital of Wuhan UniversityWuhanChina
| | - Huo‐Ping Li
- Department of CardiologyHuanggang Central Hospital of Yangtze UniversityHuanggangChina
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Singh R, Meng H, Shen T, Lumahan LEV, Nguyen S, Shen H, Dasgupta S, Qin L, Karri D, Zhu B, Yang F, Coarfa C, O’Malley BW, Yi P. TRAF4-mediated nonproteolytic ubiquitination of androgen receptor promotes castration-resistant prostate cancer. Proc Natl Acad Sci U S A 2023; 120:e2218229120. [PMID: 37155905 PMCID: PMC10193960 DOI: 10.1073/pnas.2218229120] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Accepted: 03/24/2023] [Indexed: 05/10/2023] Open
Abstract
Castration-resistant prostate cancer (CRPC) poses a major clinical challenge with the androgen receptor (AR) remaining to be a critical oncogenic player. Several lines of evidence indicate that AR induces a distinct transcriptional program after androgen deprivation in CRPCs. However, the mechanism triggering AR binding to a distinct set of genomic loci in CRPC and how it promotes CRPC development remain unclear. We demonstrate here that atypical ubiquitination of AR mediated by an E3 ubiquitin ligase TRAF4 plays an important role in this process. TRAF4 is highly expressed in CRPCs and promotes CRPC development. It mediates K27-linked ubiquitination at the C-terminal tail of AR and increases its association with the pioneer factor FOXA1. Consequently, AR binds to a distinct set of genomic loci enriched with FOXA1- and HOXB13-binding motifs to drive different transcriptional programs including an olfactory transduction pathway. Through the surprising upregulation of olfactory receptor gene transcription, TRAF4 increases intracellular cAMP levels and boosts E2F transcription factor activity to promote cell proliferation under androgen deprivation conditions. Altogether, these findings reveal a posttranslational mechanism driving AR-regulated transcriptional reprogramming to provide survival advantages for prostate cancer cells under castration conditions.
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Affiliation(s)
- Ramesh Singh
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX77030
| | - Huan Meng
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX77030
| | - Tao Shen
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX77030
| | | | - Steven Nguyen
- Department of Biology and Biochemistry, Center for Nuclear Receptors and Cell Signaling, University of Houston, Houston, TX77204
| | - Hong Shen
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX77030
| | - Subhamoy Dasgupta
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX77030
| | - Li Qin
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX77030
| | - Dileep Karri
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX77030
| | - Bokai Zhu
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX77030
| | - Feng Yang
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX77030
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX77030
| | - Cristian Coarfa
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX77030
| | - Bert W. O’Malley
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX77030
| | - Ping Yi
- Department of Biology and Biochemistry, Center for Nuclear Receptors and Cell Signaling, University of Houston, Houston, TX77204
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Wang Y, Luo X, Wu N, Liao Q, Wang J. USP7 mediates TRAF4 deubiquitination to facilitate the malignant phenotype of ovarian cancer via the RSK4/PI3K/AKT axis. J Cancer Res Ther 2023; 19:97-107. [PMID: 37006049 DOI: 10.4103/jcrt.jcrt_517_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
Abstract
BACKGROUND Ubiquitin-specific peptidase 7 (USP7) is upregulated in multiple human cancers, including ovarian cancer; however, its functional role in the latter remains largely unknown. METHODS We conducted quantitative real-time PCR to detect the expression of USP7, TRAF4, and RSK4 in ovarian cancer cell lines. In addition, Western blotting served to determine USP7, TRAF4, RSK4, PI3K, and AKT (protein kinase B,PKB) protein levels and USP7 expression in the tissues was detected by immunohistochemical staining. The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay was used to evaluate cell viability, transwell assays to evaluate cell migration and invasion, and co-immunoprecipitation to evaluate TRAF4 ubiquitination. RESULTS The results showed USP7 and TRAF4 upregulation, and RSK4 downregulation in ovarian cancer cell lines. Knocking down USP7 suppressed viability, migration, and invasion of ovarian cancer cells; TRAF4 knockdown and RSK4 overexpression had similar effects in ovarian cancer cells. TRAF4 is deubiquitinated and stabilized by USP7, whereas RSK4 is negatively regulated by TRAF4. A mouse xenograft model confirmed that knocking down USP7 suppressed ovarian tumor growth by regulating the TRAF4/RSK4/PI3K/AKT axis. CONCLUSION Knocking down USP7 decreased the proliferation, migration, and invasion of ovarian cancer cells and suppressed ovarian tumor growth in mice. Mechanistically, USP7 increased TRAF4 ubiquitination, promoting its degradation and leading to RSK4 upregulation.
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Affiliation(s)
- Ying Wang
- Department of the Central Laboratory; Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, Hunan Province, P.R. China
| | - Xia Luo
- Department of the Central Laboratory; Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, Hunan Province, P.R. China
| | - Nayiyuan Wu
- Department of the Central Laboratory; Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, Hunan Province, P.R. China
| | - Qianjin Liao
- Department of the Central Laboratory; Hunan Key Laboratory of Cancer Metabolism, Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, Hunan Province, P.R. China
| | - Jing Wang
- Department of the Central Laboratory, Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, Hunan Province, P.R. China
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Kim CM, Jang H, Hong E, Lee JH, Park HH. Structure of fish TRAF4 and its implication in TRAF4-mediated immune cell and platelet signaling. Fish Shellfish Immunol 2023; 132:108462. [PMID: 36455779 DOI: 10.1016/j.fsi.2022.108462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 11/20/2022] [Accepted: 11/27/2022] [Indexed: 06/17/2023]
Abstract
Due to an increasing interest in immunity and signal transduction in teleost fish, important key signaling molecules associated with the immune response, including TRAF molecules, have been recently cloned and characterized. To better understand the role of TRAF4 in fish immune signaling and compare it with the human system, our study cloned the TRAF4 gene from the Antarctic yellowbelly rockcod Notothenia coriiceps (ncTRAF4) and purified the protein. Here, we report the first crystal structure of teleost fish TRAF4. Based on biochemical characterization, our findings elucidated the mechanisms through which signaling molecules gain cold adaptivity. Additionally, we identified a platelet receptor GPIbβ homolog in N. coriiceps (ncGPIbβ) and found that the "RRFERLFKEARRTS" region of this homolog directly binds to ncTRAF4, indicating that ncTRAF4 also recognizes the "RLXA" motif for receptor interactions and further TARF4-mediated cellular signaling. Collectively, our findings provide novel insights into the mechanisms of TRAF4-mediated immune cell and platelet signaling in fish and the structural flexibility-mediated cold adaptiveness of signaling molecules.
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Affiliation(s)
- Chang Min Kim
- College of Pharmacy, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Hyunseok Jang
- College of Pharmacy, Chung-Ang University, Seoul, 06974, Republic of Korea; Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Eunmi Hong
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu, 41061, Republic of Korea
| | - Jun Hyuck Lee
- Unit of Research for Practical Application, Korea Polar Research Institute, Incheon, 21990, Republic of Korea
| | - Hyun Ho Park
- College of Pharmacy, Chung-Ang University, Seoul, 06974, Republic of Korea; Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul, 06974, Republic of Korea.
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Gu H, Zhu S, Peng C, Wei Z, Shen Y, Yuan C, Yang H, Cui H, Yang L. TRAF4 Promotes the Proliferation of Glioblastoma by Stabilizing SETDB1 to Activate the AKT Pathway. Int J Mol Sci 2022; 23:10161. [PMID: 36077559 DOI: 10.3390/ijms231710161] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/21/2022] [Accepted: 08/26/2022] [Indexed: 11/24/2022] Open
Abstract
The process of ubiquitination regulates the degradation, transport, interaction, and stabilization of substrate proteins, and is crucial for cell signal transduction and function. TNF receptor-associated factor 4, TRAF4, is a member of the TRAF family and is involved in the process of ubiquitination as an E3 ubiquitin protein ligase. Here, we found that TRAF4 expression correlates with glioma subtype and grade, and that TRAF4 is significantly overexpressed in glioblastoma and predicts poor prognosis. Knockdown of TRAF4 significantly inhibited the growth, proliferation, migration, and invasion of glioblastoma cells. Mechanistically, we found that TRAF4 only interacts with the Tudor domain of the AKT pathway activator SETDB1. TRAF4 mediates the atypical ubiquitination of SETDB1 to maintain its stability and function, thereby promoting the activation of the AKT pathway. Restoring SETDB1 expression in TRAF4 knockdown glioblastoma cells partially restored cell growth and proliferation. Collectively, our findings reveal a novel mechanism by which TRAF4 mediates AKT pathway activation, suggesting that TRAF4 may serve as a biomarker and promising therapeutic target for glioblastoma.
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Luo X, Cao J, Zhang C, Huang H, Liu J. TRAF4 promotes the malignant progression of high-grade serous ovarian cancer by activating YAP pathway. Biochem Biophys Res Commun 2022; 627:68-75. [PMID: 36029535 DOI: 10.1016/j.bbrc.2022.07.114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 07/25/2022] [Indexed: 11/02/2022]
Abstract
High-grade serous ovarian cancer (HGSOC) accounts for the majority of deaths caused by epithelial ovarian cancer. The specific molecular changes attributable to the pathogenesis of HGSOC are still largely unknown. TRAF4 has been identified to be up-regulated in certain cancers. However, the role and mechanism of TRAF4 in HGSOC remain unclear. In this study, we aim to explore the prognostic value and function of TRAF4 in HGSOC. Immunohistochemical staining and prognostic analysis were used to estimate the prognosis value of TRAF4 in HGSOC. Cell counting assays, colony formation assays, sphere formation assays and tumorigenic assays were used to explore the function of TRAF4 in ovarian cancer cells. Furthermore, RNA-seq, qPCR and western blotting were performed to investigate the molecular mechanism of TRAF4 in ovarian cancer cells. The results showed that TRAF4 was significantly higher expressed in ovarian cancer than normal ovarian epithelium. Moreover, high expression of TRAF4 was significantly associated with shorter overall survival and recurrence-free survival in HGSOC. Knockdown of TRAF4 significantly inhibited the proliferation and tumorigenicity of ovarian cancer cells, whereas overexpression of TRAF4 promoted the proliferation and tumorigenicity of ovarian cancer cells both in vitro and in vivo. Mechanistically, our study demonstrated that TRAF4 expression was positively correlated with the YAP pathway gene signatures, and the malignant progression induced by TRAF4 was inhibited after silencing YAP signaling by its selective inhibitor. In conclusion, our findings suggested that TRAF4 promoted the malignant progression of ovarian cancer cells by activating YAP pathway and might serve as a prognostic biomarker for HGSOC.
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Affiliation(s)
- Xiaolin Luo
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510060, China; Department of Gynecologic Oncology, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Junya Cao
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510060, China; Department of Gynecologic Oncology, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Chuyao Zhang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510060, China; Department of Gynecologic Oncology, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - He Huang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510060, China; Department of Gynecologic Oncology, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Jihong Liu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510060, China; Department of Gynecologic Oncology, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China.
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Ruan X, Zhang R, Li R, Zhu H, Wang Z, Wang C, Cheng Z, Peng H. The Research Progress in Physiological and Pathological Functions of TRAF4. Front Oncol 2022; 12:842072. [PMID: 35242717 PMCID: PMC8885719 DOI: 10.3389/fonc.2022.842072] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 01/26/2022] [Indexed: 11/22/2022] Open
Abstract
Tumour necrosis factor receptor-associated factor 4 (TRAF4) is a member of the TRAF protein family, a cytoplasmic bridging molecule closely associated with various immune functions. The physiological processes of TRAF4 are mainly involved in embryonic development, cell polarity, cell proliferation, apoptosis, regulation of reactive oxygen species production. TRAF4 is overexpressed in a variety of tumors and regulates the formation and development of a variety of tumors. In this review, we summarize the physiological and pathological regulatory functions of TRAF4 and focus on understanding the biological processes involved in this gene, to provide a reference for further studies on the role of this gene in tumorigenesis and development.
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Affiliation(s)
- Xueqin Ruan
- Department of Hematology, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Molecular Hematology, Central South University, Changsha, China
| | - Rong Zhang
- Division of Cancer Immunotherapy, National Cancer Center Exploratory Oncology Research & Clinical Trial Center, Chiba, Japan
| | - Ruijuan Li
- Department of Hematology, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Molecular Hematology, Central South University, Changsha, China
| | - Hongkai Zhu
- Department of Hematology, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Molecular Hematology, Central South University, Changsha, China
| | - Zhihua Wang
- Department of Hematology, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Molecular Hematology, Central South University, Changsha, China
| | - Canfei Wang
- Department of Hematology, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Molecular Hematology, Central South University, Changsha, China
| | - Zhao Cheng
- Department of Hematology, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Molecular Hematology, Central South University, Changsha, China
| | - Hongling Peng
- Department of Hematology, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Molecular Hematology, Central South University, Changsha, China.,Hunan Key Laboratory of Tumor Models and Individualized Medicine, The Second Xiangya Hospital, Central South University, Changsha, China
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Zhang F, Luo BH, Wu QH, Li QL, Yang KD. LncRNA HCG18 upregulates TRAF4/TRAF5 to facilitate proliferation, migration and EMT of epithelial ovarian cancer by targeting miR-29a/b. Mol Med 2022; 28:2. [PMID: 34983361 PMCID: PMC8725507 DOI: 10.1186/s10020-021-00415-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 11/24/2021] [Indexed: 12/14/2022] Open
Abstract
Background Although long noncoding RNA HLA complex group 18 (lncRNA HCG18) has been suggested to regulate cell growth in several tumours, the function of HCG18 in epithelial ovarian cancer (EOC) and its mechanism are still unclear. Methods shRNAs were applied to reduce HCG18 and related genes. For overexpression of miRNA, a miRNA mimic was transfected into cells. Quantitative real-time PCR (qRT–PCR) was used to detect levels of HCG18, miR-29a/b, and mRNAs. MTT, colony formation, wound healing and Transwell assays were used to evaluate cell proliferation, migration and invasion, respectively. A luciferase reporter assay was utilized to evaluate NF-κB activity and the binding of miRNAs with HCG18 or TRAF4/5. BALB nude mice injected with cells stably expressing shHCG18 or shNC were used for in vivo modelling. Subcutaneous tumour growth was monitored in nude mice, and immunohistochemistry (IHC) was used to determine expression of the proliferation marker Ki67. Results Abnormal expression of HCG18 and miR-29a/b was observed in EOC tissues. Knockdown of HCG18 using shRNA inhibited proliferation, migration, EMT and the proinflammatory pathway in EOC cells. miR-29a/b mimics and TRAF4/5 knockdown exhibited effects similar to HCG18 knockdown. Further experiments suggested that HCG18 directly targets miR-29a/b and upregulates TRAF4/5 expression, which are inhibited by targeting miR-29a/b. Moreover, overexpression of TRAF4/5 antagonized the inhibitory effect of HCG18 knockdown, suggesting that they are involved in HCG18-mediated oncogenic effects. Silencing HCG18 reduced tumour size and levels of Ki67 and TRAF4/5 while increasing miR-29a/b levels in vivo. Conclusions Taken together, our data revealed an oncogenic signalling pathway mediated by HCG18 in ovarian cell lines, which functions as a ceRNA of miR-29a/b and thus derepresses expression levels of TRAF4/5, facilitating NF-κB pathway-mediated promotion of EOC cell proliferation and migration. Supplementary Information The online version contains supplementary material available at 10.1186/s10020-021-00415-y.
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Affiliation(s)
- Fan Zhang
- Department of Gynecology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan Province, People's Republic of China.,Department of Physiology, School of Basic Medical Science, Central South University, Changsha, 410008, Hunan Province, People's Republic of China
| | - Bai-Hua Luo
- Department of Pathology, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan Province, People's Republic of China
| | - Qi-Hui Wu
- Department of Gynecology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan Province, People's Republic of China
| | - Qing-Ling Li
- Department of Pathology, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan Province, People's Republic of China
| | - Ke-Da Yang
- Department of Pathology, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan Province, People's Republic of China.
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11
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Wu S, Sun M, Zhang X, Liao J, Liu M, Qin Q, Wei J. Grouper TRAF4, a Novel, CP-Interacting Protein That Promotes Red-Spotted Grouper Nervous Necrosis Virus Replication. Int J Mol Sci 2021; 22:ijms22116136. [PMID: 34200212 PMCID: PMC8201248 DOI: 10.3390/ijms22116136] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Revised: 05/27/2021] [Accepted: 06/03/2021] [Indexed: 11/16/2022] Open
Abstract
Tumor necrosis factor receptor-associated factors (TRAFs) play important roles in the biological processes of immune regulation, the inflammatory response, and apoptosis. TRAF4 belongs to the TRAF family and plays a major role in many biological processes. Compared with other TRAF proteins, the functions of TRAF4 in teleosts have been largely unknown. In the present study, the TRAF4 homologue (EcTRAF4) of the orange-spotted grouper was characterized. EcTRAF4 consisted of 1413 bp encoding a 471-amino-acid protein, and the predicted molecular mass was 54.27 kDa. EcTRAF4 shares 99.79% of its identity with TRAF4 of the giant grouper (E. lanceolatus). EcTRAF4 transcripts were ubiquitously and differentially expressed in all the examined tissues. EcTRAF4 expression in GS cells was significantly upregulated after stimulation with red-spotted grouper nervous necrosis virus (RGNNV). EcTRAF4 protein was distributed in the cytoplasm of GS cells. Overexpressed EcTRAF4 promoted RGNNV replication during viral infection in vitro. Yeast two-hybrid and coimmunoprecipitation assays showed that EcTRAF4 interacted with the coat protein (CP) of RGNNV. EcTRAF4 inhibited the activation of IFN3, IFN-stimulated response element (ISRE), and nuclear factor-κB (NF-κB). Overexpressed EcTRAF4 also reduced the expression of interferon (IFN)-related molecules and pro-inflammatory factors. Together, these results demonstrate that EcTRAF4 plays crucial roles in RGNNV infection.
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Affiliation(s)
- Siting Wu
- Guangdong Laboratory for Lingnan Modern Agriculture, Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; (S.W.); (M.S.); (X.Z.); (J.L.); (M.L.)
| | - Mengshi Sun
- Guangdong Laboratory for Lingnan Modern Agriculture, Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; (S.W.); (M.S.); (X.Z.); (J.L.); (M.L.)
| | - Xin Zhang
- Guangdong Laboratory for Lingnan Modern Agriculture, Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; (S.W.); (M.S.); (X.Z.); (J.L.); (M.L.)
| | - Jiaming Liao
- Guangdong Laboratory for Lingnan Modern Agriculture, Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; (S.W.); (M.S.); (X.Z.); (J.L.); (M.L.)
| | - Mengke Liu
- Guangdong Laboratory for Lingnan Modern Agriculture, Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; (S.W.); (M.S.); (X.Z.); (J.L.); (M.L.)
| | - Qiwei Qin
- Guangdong Laboratory for Lingnan Modern Agriculture, Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; (S.W.); (M.S.); (X.Z.); (J.L.); (M.L.)
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266000, China
- Correspondence: (Q.Q.); (J.W.)
| | - Jingguang Wei
- Guangdong Laboratory for Lingnan Modern Agriculture, Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; (S.W.); (M.S.); (X.Z.); (J.L.); (M.L.)
- Correspondence: (Q.Q.); (J.W.)
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12
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Sun G, Wu C. ZFPM2-AS1 facilitates cell growth in esophageal squamous cell carcinoma via up-regulating TRAF4. Biosci Rep 2020; 40:BSR20194352. [PMID: 32065218 DOI: 10.1042/BSR20194352] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 02/04/2020] [Accepted: 02/05/2020] [Indexed: 12/13/2022] Open
Abstract
Emerging evidence has confirmed that long noncoding RNAs (lncRNAs) are strongly involved in tumor initiation and development. LncRNA ZFPM2 antisense RNA 1 (ZFPM2-AS1) has been identified as a tumor facilitator in some cancers; nevertheless, its functional significance and regulatory mechanism remain greatly unclear in esophageal squamous cell carcinoma (ESCC). Here, we detected ZFPM2-AS1 expression in ESCC cell lines using qRT-PCR. ZFPM2-AS1 knockdown models were established for investigating the biological function of ZFPM2-AS1 in ESCC cells. The association between miR-3612 and ZFPM2-AS1 or TRAF4 was assessed by RNA pull-down and luciferase reporter assays. The present study indicated that ZFPM2-AS1 was significantly up-regulated in ESCC cells. Functional assays manifested that ZFPM2-AS1 knockdown restrained cell proliferation, migration and invasion, and facilitated cell apoptosis in ESCC. Mechanistically, ZFPM2-AS1 promoted ESCC cell growth and up-regulated TRAF4 to trigger NF-κB pathway by sequestering miR-3612. Besides, miR-3612 was confirmed to be a tumor inhibitor in ESCC. Through restoration experiments, we observed that TRAF4 overexpression could recover the suppressive effect of ZFPM2-AS1 on ESCC cell growth. Collectively, all the results suggested that ZFPM2-AS1 was an oncogene in ESCC cell growth by up-regulating TRAF4 and activating NF-κB pathway.
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13
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Jiang C, Wu B, Xue M, Lin J, Hu Z, Nie X, Cai G. Inflammation accelerates copper-mediated cytotoxicity through induction of six-transmembrane epithelial antigens of prostate 4 expression. Immunol Cell Biol 2021; 99:392-402. [PMID: 33179273 DOI: 10.1111/imcb.12427] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 06/24/2020] [Accepted: 11/10/2020] [Indexed: 12/21/2022]
Abstract
Copper is an essential trace metal, but imbalance in copper homeostasis can induce oxidative damage. Inflammation is a fundamental element of various pulmonary diseases. Although a positive relationship between copper and chronic pulmonary diseases has been reported, the underlying reasons are still not clear. The copper level in the sputum of patients with various pulmonary diseases was measured. An inflammatory model was established to evaluate the impact of inflammation on copper uptake in the lung. We found that the level of sputum copper was increased in patients with various pulmonary diseases, especially chronic obstructive pulmonary disease and asthma. Then, we confirmed that mice with pulmonary inflammation were susceptible to copper-mediated oxidative damage because of copper overload in lung tissue. Further investigation demonstrated that interleukin (IL)-17 and tumor necrosis factor (TNF)-α exerted synergistic effects in airway epithelial cells by upregulating the expression of six-transmembrane epithelial antigens of prostate 4 (STEAP4), a metalloreductase that reduces extracellular copper ions from the cupric state to the cuprous state and facilitates copper uptake. Inhibition of STEAP4 decreased the copper uptake of cells and inhibited copper-mediated oxidative damage. Moreover, we demonstrated that the upregulation of STEAP4 by IL-17 and TNF-α was largely dependent on TNF receptor-associated factor 4 (TRAF4). Traf4-/- mice were resistant to copper-mediated oxidative damage. Our data suggest a novel IL-17/TNF-α-TRAF4-STEAP4 axis that regulates copper homeostasis.
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Affiliation(s)
- Cen Jiang
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiaotong University Medical School, Shanghai, China
| | - Beiying Wu
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiaotong University Medical School, Shanghai, China
| | - Minghui Xue
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiaotong University Medical School, Shanghai, China
| | - Jiafei Lin
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiaotong University Medical School, Shanghai, China
| | - Zhenli Hu
- Department of Respiratory Diseases, Changhai Hospital, The Second Military Medical University, Shanghai, China
| | - Xiaomeng Nie
- Department of Respiratory Diseases, Changhai Hospital, The Second Military Medical University, Shanghai, China
| | - Gang Cai
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiaotong University Medical School, Shanghai, China
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Chen H, Qian Z, Zhang S, Tang J, Fang L, Jiang F, Ge D, Chang J, Cao J, Yang L, Cao X. Silencing COX-2 blocks PDK1/ TRAF4-induced AKT activation to inhibit fibrogenesis during skeletal muscle atrophy. Redox Biol 2021; 38:101774. [PMID: 33152664 PMCID: PMC7645269 DOI: 10.1016/j.redox.2020.101774] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 10/26/2020] [Accepted: 10/27/2020] [Indexed: 02/08/2023] Open
Abstract
Skeletal muscle atrophy with high prevalence can induce weakness and fatigability and place huge burden on both health and quality of life. During skeletal muscle degeneration, excessive fibroblasts and extracellular matrix (ECM) accumulated to replace and impair the resident muscle fiber and led to loss of muscle mass. Cyclooxygenase-2 (COX-2), the rate-limiting enzyme in synthesis of prostaglandin, has been identified as a positive regulator in pathophysiological process like inflammation and oxidative stress. In our study, we found injured muscles of human subjects and mouse model overexpressed COX-2 compared to the non-damaged region and COX-2 was also upregulated in fibroblasts following TGF-β stimulation. Then we detected the effect of selective COX-2 inhibitor celecoxib on fibrogenesis. Celecoxib mediated anti-fibrotic effect by inhibiting fibroblast differentiation, proliferation and migration as well as inactivating TGF-β-dependent signaling pathway, non-canonical TGF-β pathways and suppressing generation of reactive oxygen species (ROS) and oxidative stress. In vivo pharmacological inhibition of COX-2 by celecoxib decreased tissue fibrosis and increased skeletal muscle fiber preservation reflected by less ECM formation and myofibroblast accumulation with decreased p-ERK1/2, p-Smad2/3, TGF-βR1, VEGF, NOX2 and NOX4 expression. Expression profiling further found that celecoxib could suppress PDK1 expression. The interaction between COX-2 and PDK1/AKT signaling remained unclear, here we found that COX-2 could bind to PDK1/AKT to form compound. Knockdown of COX-2 in fibroblasts by pharmacological inactivation or by siRNA restrained PDK1 expression and AKT phosphorylation induced by TGF-β treatment. Besides, si-COX-2 prevented TGF-β-induced K63-ubiquitination of AKT by blocking the interaction between AKT and E3 ubiquitin ligase TRAF4. In summary, we found blocking COX-2 inhibited fibrogenesis after muscle atrophy induced by injury and suppressed AKT signaling pathway by inhibiting upstream PDK1 expression and preventing the recruitment of TRAF4 to AKT, indicating that COX-2/PDK1/AKT signaling pathway promised to be target for treating muscle atrophy in the future.
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Affiliation(s)
- Hongtao Chen
- Department of Orthopedics, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Zhanyang Qian
- Department of Orthopedics, Zhongda Hospital of Southeast University, Nanjing, Jiangsu, China
| | - Sheng Zhang
- Department of Orthopedics, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jian Tang
- Department of Plastic and Burn Surgery, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Le Fang
- Department of Critical Care Medicine, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Fan Jiang
- Department of Orthopedics, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Dawei Ge
- Department of Orthopedics, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jie Chang
- Department of Orthopedics, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jiang Cao
- Department of Orthopedics, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Lei Yang
- Department of Orthopedics, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China.
| | - Xiaojian Cao
- Department of Orthopedics, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China.
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15
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Ren H, Mi X, Zhao P, Zhao X, Wei N, Huang H, Meng Z, Kou J, Sun M, Liu Y, Zhang H, Yang J, Li W, Li H. TRAF4, a new substrate of SIAH1, participates in chemotherapy resistance of breast cancer cell by counteracting SIAH1-mediated downregulation of β-catenin. Breast Cancer Res Treat 2020; 183:275-289. [PMID: 32671611 DOI: 10.1007/s10549-020-05789-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 07/04/2020] [Indexed: 12/22/2022]
Abstract
PURPOSE TRAF4 plays an important role in the development and progression of breast cancer, but its impact on chemotherapy resistance is as yet, however, poorly understood. METHODS Western blotting, immunoprecipitation, and immunofluorescence staining were used to identify and verify that TRAF4 was a novel substrate of SIAH1 and prevented SIAH1-mediated β-catenin degradation. Cell proliferation analysis and Flow cytometry analysis were utilized to detect TRAF4's function on the growth-inhibitory effect of etoposide. Immunohistochemistry was used to detect the expression of TRAF4, SIAH1, and β-catenin. Statistical analysis was used to analyze the relationships between them with clinical parameters and curative effect of chemotherapy pathologically. RESULTS Our results suggested that TRAF4 prevents SIAH1-mediated β-catenin degradation. TRAF4 was a novel substrate of SIAH1 and the TRAF domain of TRAF4 was critical for binding to SIAH1. TRAF4 reduced the growth-inhibitory effect of etoposide via reducing the number of S-phase cells and suppressing cell apoptosis. Concordantly, we found that breast cancer patients with a low-TRAF4 expression benefited most from chemotherapy, who had higher tumor volume reduction rate and better pathological response, while, the high-TRAF4 expression group had lower tumor volume reduction rate and poor pathological response. CONCLUSIONS TRAF4 was a novel substrate of SIAH1 and prevented SIAH1-mediated β-catenin degradation, which explains the protective effect of TRAF4 on β-catenin during cell stress and links TRAF4 to chemotherapy resistance in tumors. These findings implicated a novel pathway for the oncogenic function of TRAF4.
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Affiliation(s)
- Huayan Ren
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,College of Basic Medical Sciences, Zhengzhou University, Jianshe Road 1, Erqi Ward, Zhengzhou, 450052, P.R. China
| | - Xiaoyi Mi
- Department of Pathology, College of Basic Medical Sciences and First Affiliated Hospital, China Medical University, Shenyang, China
| | - Pengyuan Zhao
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,College of Basic Medical Sciences, Zhengzhou University, Jianshe Road 1, Erqi Ward, Zhengzhou, 450052, P.R. China
| | - Xueyan Zhao
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,College of Basic Medical Sciences, Zhengzhou University, Jianshe Road 1, Erqi Ward, Zhengzhou, 450052, P.R. China
| | - Na Wei
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,College of Basic Medical Sciences, Zhengzhou University, Jianshe Road 1, Erqi Ward, Zhengzhou, 450052, P.R. China
| | - Huifen Huang
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,College of Basic Medical Sciences, Zhengzhou University, Jianshe Road 1, Erqi Ward, Zhengzhou, 450052, P.R. China
| | - Zhongqin Meng
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,College of Basic Medical Sciences, Zhengzhou University, Jianshe Road 1, Erqi Ward, Zhengzhou, 450052, P.R. China
| | - Junna Kou
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,College of Basic Medical Sciences, Zhengzhou University, Jianshe Road 1, Erqi Ward, Zhengzhou, 450052, P.R. China
| | - Mingfang Sun
- Department of Pathology, College of Basic Medical Sciences and First Affiliated Hospital, China Medical University, Shenyang, China
| | - Yuqiong Liu
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,College of Basic Medical Sciences, Zhengzhou University, Jianshe Road 1, Erqi Ward, Zhengzhou, 450052, P.R. China
| | - Hongyan Zhang
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,College of Basic Medical Sciences, Zhengzhou University, Jianshe Road 1, Erqi Ward, Zhengzhou, 450052, P.R. China
| | - Jianping Yang
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,College of Basic Medical Sciences, Zhengzhou University, Jianshe Road 1, Erqi Ward, Zhengzhou, 450052, P.R. China
| | - Wencai Li
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,College of Basic Medical Sciences, Zhengzhou University, Jianshe Road 1, Erqi Ward, Zhengzhou, 450052, P.R. China
| | - Huixiang Li
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China. .,College of Basic Medical Sciences, Zhengzhou University, Jianshe Road 1, Erqi Ward, Zhengzhou, 450052, P.R. China.
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16
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Chen X, Xu H. LncRNA SNHG15 regulates osteosarcoma progression in vitro and in vivo via sponging miR-346 and regulating TRAF4 expression. Open Life Sci 2020; 15:423-436. [PMID: 33817231 PMCID: PMC7874646 DOI: 10.1515/biol-2020-0039] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 04/06/2020] [Accepted: 04/16/2020] [Indexed: 12/13/2022] Open
Abstract
Osteosarcoma (OS) is a common primary malignant bone tumor around the world. It has been reported that long noncoding RNAs (lncRNAs) take part in diverse pathological processes of OS; however, the mechanism remains unknown. This study aimed to uncover the profile of lncRNA small nucleolar RNA host gene 15 (SNHG15), its biological function, and its potential involvement in the mechanism of OS progression in vitro and in vivo. The expression of SNHG15 and TRAF4 was promoted in OS tissues opposite for that of miR-346. The silencing of SNHG15 limited the proliferation, invasion, and enhanced apoptosis of SaoS2 and HOS cells. Moreover, the putative binding sites between miR-346 and SNHG15 or TRAF4 were predicted by starBase and Targetscan software online, individually. Also, miR-346 deletion reversed the positive effects of SNHG15 elimination on proliferation, apoptosis, and invasion in cells. In addition, the upregulation of TRAF4 disrupted the biofunctional results from miR-346 promotion subsequently. Finally, SNHG15 knockdown repressed OS tumor growth in a xenograft tumor model. SNHG15 enhanced the progression of OS by regulating the miR-346/TRAF4 axis in vitro and in vivo.
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Affiliation(s)
- Xuewu Chen
- Department of Spine Surgery, Research Center of Spine Surgery, Yijishan Hospital (The First Affiliated Hospital of Wannan Medical College), No. 2, West Zheshan Road, Wuhu, 241001, Anhui, China
| | - Hongguang Xu
- Department of Spine Surgery, Research Center of Spine Surgery, Yijishan Hospital (The First Affiliated Hospital of Wannan Medical College), No. 2, West Zheshan Road, Wuhu, 241001, Anhui, China
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17
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Tang L, Wang M, Jiang L, Zeng C. TRAF4 knockdown triggers synergistic lethality with simultaneous PARP1 inhibition in endometrial cancer. Hum Cell 2020; 33:801-9. [PMID: 32388810 DOI: 10.1007/s13577-020-00363-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 04/14/2020] [Indexed: 10/24/2022]
Abstract
Endometrial cancer (EC) is one of the most common cancers among females worldwide. Advanced stage patients of EC have poor prognosis. Inevitable side effects and treatment tolerance of chemotherapy for EC remain to be addressed. Our results in this study showed that EC cells with higher tumor necrosis factor receptor-associated factor 4 (TRAF4) expression have lower sensitivity to poly ADP-ribose polymerase 1 (PARP1) inhibitors. Upon TRAF4 knockdown, the colony numbers of EC cells were markedly down-regulated, and the markers of DNA double-strand breakage were significantly up-regulated after the treatment of olaparib, a PARP1 inhibitor. TRAF4 knockdown reduced the phosphorylation of protein kinase B (Akt), promoted DNA double-strand breakage, and decreased levels of DNA repair related proteins, including phosphorylated-DNA-dependent protein kinase (p-DNA-PK) and RAD51 recombinase (RAD51). In addition, TRAF4's effect on the sensitivity of EC cells to olaparib was further found to be mainly mediated by Akt phosphorylation. Moreover, in vivo results showed that TRAF4 knockdown enhanced the sensitivity of EC to PARP1 inhibitors using a mouse xenograft model. Collectively, our data suggest that combined application of TRAF4 knockdown and PARP1 inhibition can be used as a promising strategy for synthetic lethality in EC treatment.
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Yan Z, Yang Q, Xue M, Wang S, Hong W, Gao X. YY1-induced lncRNA ZFPM2-AS1 facilitates cell proliferation and invasion in small cell lung cancer via upregulating of TRAF4. Cancer Cell Int 2020; 20:108. [PMID: 32280300 PMCID: PMC7126398 DOI: 10.1186/s12935-020-1157-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 02/29/2020] [Indexed: 12/26/2022] Open
Abstract
Background Newly identified lncRNA zinc finger protein, FOG family member 2 antisense RNA 1 (ZFPM2-AS1) is identified as an oncogenic gene. However, the role of ZFPM2-AS1 in small cell lung cancer (SCLC) is poorly comprehended. Methods The expression of genes in SCLC tissues and cells was measured by qRT-PCR. Colony formation, EdU, CCK-8, transwell and wound healing as well as in vivo assays revealed the function of ZFPM2-AS1 in SCLC. ChIP, luciferase reporter, RIP and RNA pull down assays demonstrated the binding relation among genes. Results ZFPM2-AS1 was significantly upregulated in SCLC tissues and cells. ZFPM2-AS1 deficiency attenuated SCLC cell proliferation, invasion and migration. In addition, ZFPM2-AS1 was transcriptionally activated by Yin Yang 1 (YY1) factor. Further, miR-3612 was confirmed as downstream miRNA of ZFPM2-AS1. Moreover, TNF receptor associated factor 4 (TRAF4) was the target gene of miR-3612 in SCLC. ZFPM2-AS1, miR-3612 and TRAF4 jointly constituted a competing endogenous RNA (ceRNA) network in SCLC. Finally, TRAF4 could countervail ZFPM2-AS1 downregulation-mediated function on SCLC cell proliferation and invasion in vitro and tumor growth in vivo. Conclusion Our study elucidated the oncogenic effect of ZFPM2-AS1 in SCLC progression, indicating it may be a therapeutic target for SCLC.
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Affiliation(s)
- Zhijun Yan
- 1Department of Respiratory Medicine, Minhang Hospital, Fudan University, 170 Xinsong Road, Shanghai, 201199 China
| | - Qilian Yang
- 2Department of Pharmacy, Minhang Hospital, Fudan University, 170 Xinsong Road, Shanghai, 201199 China
| | - Min Xue
- 1Department of Respiratory Medicine, Minhang Hospital, Fudan University, 170 Xinsong Road, Shanghai, 201199 China
| | - Sheng Wang
- 3Institutes of Biomedical Sciences, Fudan University, 131 Dongan Road, Shanghai, 200032 China
| | - Weijun Hong
- 1Department of Respiratory Medicine, Minhang Hospital, Fudan University, 170 Xinsong Road, Shanghai, 201199 China
| | - Xiwen Gao
- 1Department of Respiratory Medicine, Minhang Hospital, Fudan University, 170 Xinsong Road, Shanghai, 201199 China
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Cen S, Li J, Cai Z, Pan Y, Sun Z, Li Z, Ye G, Zheng G, Li M, Liu W, Yu W, Wang S, Xie Z, Wang P, Shen H. TRAF4 acts as a fate checkpoint to regulate the adipogenic differentiation of MSCs by activating PKM2. EBioMedicine 2020; 54:102722. [PMID: 32268273 PMCID: PMC7191261 DOI: 10.1016/j.ebiom.2020.102722] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 02/18/2020] [Accepted: 03/03/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Mesenchymal stem cells (MSCs) selectively differentiate into adipocytes or osteoblasts, and several molecules control the fate determination of MSCs. Understanding these key checkpoints greatly contributes to the ability to induce specific MSC differentiation for clinical applications. In this study, we aimed to explore whether TNF receptor-associated factor 4 (TRAF4) affects MSC adipogenic differentiation, which we previously reported that could positively regulated the osteogenic differentiation. METHODS Western blotting and Real-time Polymerase Chain Reaction were used to detected the expression pattern of TRAF4 during adipogenic differentiation. Lentivirus was constructed to regulate TRAF4 expression, and oil red O staining and Western blotting were used to assess its role in adipogenesis, which was confirmed in vivo by implanting an MSC-matrigel mixture into nude mice. Western blotting was used to detect the activated signaling pathways, and a specific inhibitor and agonist were used to clear the roles of the key signaling pathways. Additionaly, Co-Immunoprecipitation was conducted to find that Pyruvate kinase isozyme type M2 (PKM2) interacts with TRAF4, and to further explore their binding and functional domains. Finally, an RNA-binding protein immunoprecipitation assay and Western blotting were used to detect whether N6-methyladenosine mediates the decreased TRAF4 expression during adipogenic differentiation. FINDINGS The results demonstrated that TRAF4 negatively regulates MSC adipogenesis in vitro and in vivo. Mechanistically, we revealed that TRAF4 binds to PKM2 to activate the kinase activity of PKM2, which subsequently activates β-catenin signaling and then inhibits adipogenesis. Furthermore, TRAF4 downregulation during adipogenesis is regulated by ALKBH5-mediated N6-methyladenosine RNA demethylation. INTERPRETATION TRAF4 negatively regulates the adipogenesis of MSCs by activating PKM2 kinase activity, which may act as a checkpoint to fine-tune the balance of adipo-osteogenic differentiation, and suggests that TRAF4 may be a novel target of MSCs in clinical use and may also illuminate the underlying mechanisms of bone metabolic diseases. FUNDING This study was supported by the National Natural Science Foundation of China (81871750 and 81971518) and the Science and Technology Project of Guangdong Province (2019B02023600 and 2017A020215070).
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Affiliation(s)
- Shuizhong Cen
- Department of Orthopedics, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518003, PR China; Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, PR China
| | - Jinteng Li
- Department of Orthopedics, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518003, PR China
| | - Zhaopeng Cai
- Department of Orthopedics, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518003, PR China
| | - Yiqian Pan
- Department of Orthopedics, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518003, PR China; Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, PR China
| | - Zehang Sun
- Department of Orthopedics, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518003, PR China; Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, PR China
| | - Zhaofeng Li
- Department of Orthopedics, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518003, PR China; Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, PR China
| | - Guiwen Ye
- Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, PR China
| | - Guan Zheng
- Department of Orthopedics, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518003, PR China
| | - Ming Li
- Department of Orthopedics, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518003, PR China; Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, PR China
| | - Wenjie Liu
- Department of Orthopedics, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518003, PR China; Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, PR China
| | - Wenhui Yu
- Department of Orthopedics, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518003, PR China
| | - Shan Wang
- Center for Biotherapy, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, PR China
| | - Zhongyu Xie
- Department of Orthopedics, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518003, PR China.
| | - Peng Wang
- Department of Orthopedics, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518003, PR China.
| | - Huiyong Shen
- Department of Orthopedics, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518003, PR China; Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, PR China.
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Wang AH, Jin CH, Cui GY, Li HY, Wang Y, Yu JJ, Wang RF, Tian XY. MIR210HG promotes cell proliferation and invasion by regulating miR-503-5p/ TRAF4 axis in cervical cancer. Aging (Albany NY) 2020; 12:3205-3217. [PMID: 32087604 PMCID: PMC7066889 DOI: 10.18632/aging.102799] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 01/12/2020] [Indexed: 01/31/2023]
Abstract
Long non-coding RNAs (lncRNAs) play important roles in the progression of cervical cancer (CC). However, the roles and underlying molecular mechanisms of lncRNAs in CC remain unclear. In the current study, we discovered a new lncRNA MIR210HG which was upregulated in CC tissues through microarray. The upregulation of MIR210HG was associated with advanced FIGO stage, metastasis, and poor prognosis in CC patients. Function assays showed that MIR210HG inhibition significantly suppressed the proliferation, invasion, and epithelial-mesenchymal transition (EMT) processes in CC and reduced tumor growth in vivo. Mechanistically, we identified that MIR210HG might serve as a competing endogenous RNA (ceRNA) of miR-503-5p to relieve the repressive effect of miR-503-5p on TRAF4 expression in CC cells. In conclusion, we demonstrated that MIR210HG promoted CC progression through regulating the MIR210HG/miR-503-5p/TRAF4 axis, indicating that MIR210HG might act as a novel insight into CC treatment.
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Affiliation(s)
- Ai-Hong Wang
- Department of Gynecologic and Obstetrics, The First Affiliated Hospital, College of Clinical Medicine, Henan University of Science and Technology, Luoyang 471000, Henan, China.,Department of Gynecologic and Obstetrics, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Can-Hui Jin
- Department of Gastrointestinal Tumor Surgery, The First Affiliated Hospital, College of Clinical Medicine, Henan University of Science and Technology, Luoyang 471000, Henan,China
| | - Guan-Yi Cui
- University Hospital, Henan University of Science and Technology, Luoyang 471000, Henan, China
| | - Hong-Yu Li
- Department of Gynecologic and Obstetrics, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Yin Wang
- Department of Gynecologic and Obstetrics, The First Affiliated Hospital, College of Clinical Medicine, Henan University of Science and Technology, Luoyang 471000, Henan, China
| | - Juan-Juan Yu
- Department of Gynecologic and Obstetrics, The First Affiliated Hospital, College of Clinical Medicine, Henan University of Science and Technology, Luoyang 471000, Henan, China
| | - Rui-Fang Wang
- Department of Gynecologic and Obstetrics, The First Affiliated Hospital, College of Clinical Medicine, Henan University of Science and Technology, Luoyang 471000, Henan, China
| | - Xiao-Yu Tian
- Department of Gynecologic and Obstetrics, The First Affiliated Hospital, College of Clinical Medicine, Henan University of Science and Technology, Luoyang 471000, Henan, China
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Gao Z, Liu H, Shi Y, Yin L, Zhu Y, Liu R. Identification of Cancer Stem Cell Molecular Markers and Effects of hsa-miR-21-3p on Stemness in Esophageal Squamous Cell Carcinoma. Cancers (Basel) 2019; 11:cancers11040518. [PMID: 30979011 PMCID: PMC6521292 DOI: 10.3390/cancers11040518] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/01/2019] [Accepted: 04/08/2019] [Indexed: 12/25/2022] Open
Abstract
Cancer stem cells (CSCs) are closely related to tumor resistance and tumor recurrence in esophageal squamous cell carcinoma (ESCC). The lack of specific biomarkers to identify and isolate CSCs has led to the slow progression of research on CSCs in ESCC. Here, we established a method to identify and isolate CSCs in ESCC using fluorescence-activated cell sorting with combined surface biomarkers including CD71, CD271, and CD338. CD71−/CD271+/CD338+ subpopulation cells possessed more stem cell properties in proliferation, self-renewal, differentiation, metastasis, drug resistance, and tumorigenesis. We further explored possible roles that microRNAs played in stem cells. Using microarrays, we identified that has-miR-21-3p was highly expressed in positive sorted cells, and further functional and Luciferase reporter assays verified that has-miR-21-3p promoted proliferation and anti-apoptosis by regulating TRAF4. We further analyzed the relationship between hsa-miR-21-3p and ESCC in 137 patients with ESCC. Statistical analysis showed that up-regulation of hsa-miR-21-3p was associated with a high risk of ESCC. Collectively, we identified surface biomarkers of stem cells in esophageal squamous cell carcinoma, and discovered thathsa-miR-21-3p may be involved in stemness maintenance by regulating TRAF4.
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Affiliation(s)
- Zhikui Gao
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210000, China.
| | - Hui Liu
- Chengdu Center for Disease Control and Prevention, Chengdu 610000, China.
| | - Yajuan Shi
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210000, China.
| | - Lihong Yin
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210000, China.
| | - Yong Zhu
- Department of Environmental Health Sciences, Yale School of Public Health, New Haven, CT 06510, USA.
| | - Ran Liu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210000, China.
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Cai G, Zhu L, Chen X, Sun K, Liu C, Sen GC, Stark GR, Qin J, Li X. TRAF4 binds to the juxtamembrane region of EGFR directly and promotes kinase activation. Proc Natl Acad Sci U S A 2018; 115:11531-6. [PMID: 30352854 DOI: 10.1073/pnas.1809599115] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The activation of the epidermal growth factor receptor (EGFR) is crucial for triggering diverse cellular functions, including cell proliferation, migration, and differentiation, and up-regulation of EGFR expression or activity is a key factor in triggering the development of cancer. Here we show that overexpression of a scaffold protein, tumor necrosis factor receptor (TNF-R)-associated factor 4 (TRAF4), promotes EGF-induced autophosphorylation of EGFR (activation) and downstream signaling, whereas TRAF4 deficiency attenuates EGFR activation and EGF-driven cell proliferation. Using structure-based sequence alignment and NMR spectroscopy, we identified a TRAF4 binding site in the C-terminal half of the juxtamembrane (JM) segment of EGFR, a region known to promote asymmetric dimerization and subsequent activation. Deletion of the TRAF4 binding site led to dramatic defects in EGFR activation and EGF-driven cell proliferation. Specific point mutations in the TRAF4 binding site also resulted in significant attenuation of EGFR activation. Detailed structural examination of the inactive versus active forms of EGFR suggests that TRAF4 binding probably induces a conformational rearrangement of the JM region to promote EGFR dimerization. These results identify a novel mechanism of TRAF4-mediated EGFR activation and signaling.
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Shi B, Bao J, Liu Y, Shi J. Death receptor 6 promotes ovarian cancer cell migration through KIF11. FEBS Open Bio 2018; 8:1497-1507. [PMID: 30186750 PMCID: PMC6120224 DOI: 10.1002/2211-5463.12492] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Revised: 06/23/2018] [Accepted: 06/29/2018] [Indexed: 01/20/2023] Open
Abstract
The expression of death receptor 6 (DR6) is abnormal in some cancer types, but the function and underlying molecular mechanisms of DR6 in tumor progression are not yet clear. In the present study, our analysis of ovarian cancer RNA sequencing data from The Cancer Genome Atlas revealed that DR6 is upregulated in human ovarian cancer. We confirmed that the expression level of DR6 is upregulated in ovarian cancer tissues when compared with matched adjacent normal tissues. In addition, DR6 enhanced ovarian carcinoma cell migration ability, and decreased expression of DR6 inhibited the expression of matrix metalloprotease (MMP) 2 and MMP9, and increased the expression of E‐cadherin. Additionally, DR6 shRNA caused a significant decrease in phosphoinositide‐3‐kinase (PI3K), phospho (p) ‐AKT, p‐extracellular signal‐regulated kinase (ERK), and p‐mitogen‐activated protein kinase kinase expression in SKOV3 cells. These results suggested that DR6 can enhance ovarian carcinoma cell migration ability through the mitogen‐activated protein kinase/ERK and PI3K/AKT pathways. Notably, mass spectrometric analysis indicated that DR6 co‐purified with kinesin family member 11 (KIF11), and we verified the interaction between KIF11 and DR6 by co‐immunoprecipitation and glutathione S‐transferase pull‐down. Furthermore, we demonstrated that DR6 can bind tumor necrosis factor receptor‐associated factor 4 (TRAF4) with co‐immunoprecipitation. Overexpression of KIF11 or TRAF4 eliminated the suppression of carcinoma cell migration by DR6 knockdown. We also found that TRAF4 and KIF11 were upregulated in ovarian carcinomas and that their level of expression was positively correlated with that of DR6. The findings above suggest that DR6 may play a notable oncogenic role in ovarian malignancy by interacting with TRAF4 and KIF11, and that DR6 may be an effective therapeutic target in ovarian cancer.
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Affiliation(s)
- Bianhua Shi
- National Laboratory of Medical Molecular Biology Institute of Basic Medical Sciences Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
| | - Jiayu Bao
- National Laboratory of Medical Molecular Biology Institute of Basic Medical Sciences Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
| | - Yongbin Liu
- National Laboratory of Medical Molecular Biology Institute of Basic Medical Sciences Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
| | - Juan Shi
- National Laboratory of Medical Molecular Biology Institute of Basic Medical Sciences Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
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Yang L, Guo Y, Liu X, Wang T, Tong X, Lei K, Wang J, Huang D, Xu Q. The tumor suppressive miR-302c-3p inhibits migration and invasion of hepatocellular carcinoma cells by targeting TRAF4. J Cancer 2018; 9:2693-2701. [PMID: 30087710 PMCID: PMC6072805 DOI: 10.7150/jca.25569] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 06/02/2018] [Indexed: 12/17/2022] Open
Abstract
MicroRNAs (miRNAs) have been recognized as key regulators of tumorigenesis and progression. Serum miR-302c-3p expression is prominently deregulated in HCV-related hepatocellular carcinoma (HCC). However, the expression of miR-302c-3p and its functional role in HBV-related HCC are rarely investigated. In this study, we found that the expression levels of miR-302c-3p were prominently down-regulated in HCC tissues compared to matched tumor-adjacent tissues. Moreover, miR-302c-3p under-expression was detected in HCC cell lines compared to a normal hepatic cell line LO2. Low miR-302c-3p expression was positively correlated with multiple tumor nodes, venous infiltration and advanced TNM tumor stage of HCC patients. Notably, our follow up data and TCGA data demonstrated that low miR-302c-3p expression predicted a poor survival of HCC patients. Functionally, miR-302c-3p overexpression inhibited migration and invasion of MHCC97H cells in vitro. Additionally, miR-302c-3p knockdown showed an opposite effect on these metastatic behaviors of HepG2 cells. MiR-302c-3p negatively regulated tumor necrosis factor receptor associated factor 4 (TRAF4) abundance by directly targeting 3'-UTR of TRAF4 mRNA. The expression of TRAF4 was up-regulated in HCC tissues. The level of TRAF4 mRNA was inversely correlated with miR-302c-3p expression in HCC specimens. Mechanistically, miR-302c-3p restrained AKT-mediated epithelial-mesenchymal transition (EMT) in HCC cells. Importantly, TRAF4 restoration reversed the inhibitory effect of miR-302c-3p on AKT-induced EMT and HCC cell metastasis. MK2206, an AKT inhibitor, inhibited miR-302c-3p knockdown-induced EMT in HepG2 cells. In summary, these results indicate that miR-302c-3p exhibits a tumor suppressive role in HCC by targeting TRAF4. Inhibition of miR-302c-3p/TRAF4 axis may serve as a therapeutic target for HCC.
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Affiliation(s)
- Liu Yang
- Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province, Zhejiang Provincial People's Hospital (People's Hospital of Hangzhou Medical College), Hangzhou, Zhejiang 310014, China
| | - Yang Guo
- Bengbu Medical College, Bengbu, Anhui 233030, China
| | - Xin Liu
- Department of Neurosurgery, Zhejiang Provincial People's Hospital (People's Hospital of Hangzhou Medical College), Hangzhou, Zhejiang 310014, China
| | - Tongtong Wang
- ZheJiang Chinese Medical University, Hangzhou, Zhejiang 310014, China
| | - Xiangmin Tong
- Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province, Zhejiang Provincial People's Hospital (People's Hospital of Hangzhou Medical College), Hangzhou, Zhejiang 310014, China
| | - Kefeng Lei
- Department of Gynecology, Zhejiang Provincial People's Hospital (People's Hospital of Hangzhou Medical College), Hangzhou, Zhejiang 310014, China
| | - Jiahui Wang
- School of Basic Medical Sciences, Shandong University, Jinan, Shandong 250000, China
| | - Dongsheng Huang
- Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province, Zhejiang Provincial People's Hospital (People's Hospital of Hangzhou Medical College), Hangzhou, Zhejiang 310014, China
| | - Qiuran Xu
- Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province, Zhejiang Provincial People's Hospital (People's Hospital of Hangzhou Medical College), Hangzhou, Zhejiang 310014, China
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Kim CM, Son YJ, Kim S, Kim SY, Park HH. Molecular basis for unique specificity of human TRAF4 for platelets GPIbβ and GPVI. Proc Natl Acad Sci U S A 2017; 114:11422-7. [PMID: 29073066 DOI: 10.1073/pnas.1708688114] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Tumor necrosis factor (TNF)-receptor associated factor 4 (TRAF4), an adaptor protein with E3-ligase activity, is involved in embryogenesis, cancer initiation and progression, and platelet receptor (GPIb-IX-V complex and GPVI)-mediated signaling for reactive oxygen species (ROS) production that initiates thrombosis at arterial shears. Disruption of platelet receptors and the TRAF4 interaction is a potential target for therapeutic intervention by antithrombotic drugs. Here, we report a crystal structure of TRAF4 (amino acid residues 290∼470) in complex with a peptide from the GPIbβ receptor (amino acid residues 177∼181). The GPIbβ peptide binds to a unique shallow surface composed of two hydrophobic pockets on TRAF4. Further studies revealed the TRAF4-binding motif Arg-Leu-X-Ala. The TRAF4-binding motif was present not only in platelet receptors but also in the TGF-β receptor. The current structure will provide a template for furthering our understanding of the receptor-binding specificity of TRAF4, TRAF4-mediated signaling, and related diseases.
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Yao Y, Zhao K, Yu Z, Ren H, Zhao L, Li Z, Guo Q, Lu N. Wogonoside inhibits invasion and migration through suppressing TRAF2/4 expression in breast cancer. J Exp Clin Cancer Res 2017; 36:103. [PMID: 28774312 PMCID: PMC5543547 DOI: 10.1186/s13046-017-0574-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Accepted: 07/27/2017] [Indexed: 01/05/2023]
Abstract
Background Twist1 is involved in tumor initiation and progression, which especially contributes to tumor invasion and metastasis. Wogonoside is the main in-vivo metabolite of wogonin, and it is also a natural product with potential treatment effects against cancer. Methods In this study, we investigated the in-vitro anti-invasion and in-vivo anti-metastasis effects of wogonoside on breast cancer cells and uncovered its underlying mechanism. Results The results showed that wogonoside could suppress the growth and metastasis of breast tumor in the orthotopic model of MDA-MB-231 cells. We found that wogonoside could reduce the overexpression of TNF-α, TRAF2 and TRAF4 in later stage of tumor, and improved tumor microenvironment. Therefore, TNF-α was utilized to induce metastases of breast cancer cell in vitro. Wogonoside could inhibit invasion and migration in TNF-α-induced MDA-MB-231, MDA-MB-435, and BT-474 cells. Mechanically, wogonoside inactivated NF-κB signaling through decreasing the protein expression of TRAF2/4, which further inhibited Twist1 expression. Consequently, wogonoside could down-regulate MMP-9, MMP-2, vimentin and CD44v6 expression in TNF-α-induced MDA-MB-231 and MDA-MB-435 cells. Then, these findings were proved in TNF-α + TGF-β1-induced MCF7 cells. Conclusions Wogonoside might be a potential therapeutic agent for the treatment of tumor metastasis in breast cancer.
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Affiliation(s)
- Yuyuan Yao
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, 210009, People's Republic of China
| | - Kai Zhao
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, 210009, People's Republic of China
| | - Zhou Yu
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, 210009, People's Republic of China
| | - Haochuan Ren
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, 210009, People's Republic of China
| | - Li Zhao
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, 210009, People's Republic of China
| | - Zhiyu Li
- Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, 210009, People's Republic of China
| | - Qinglong Guo
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, 210009, People's Republic of China.
| | - Na Lu
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, 210009, People's Republic of China.
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Willsey HR, Zheng X, Carlos Pastor-Pareja J, Willsey AJ, Beachy PA, Xu T. Localized JNK signaling regulates organ size during development. eLife 2016; 5. [PMID: 26974344 PMCID: PMC4848088 DOI: 10.7554/elife.11491] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 03/12/2016] [Indexed: 11/17/2022] Open
Abstract
A fundamental question of biology is what determines organ size. Despite demonstrations that factors within organs determine their sizes, intrinsic size control mechanisms remain elusive. Here we show that Drosophila wing size is regulated by JNK signaling during development. JNK is active in a stripe along the center of developing wings, and modulating JNK signaling within this stripe changes organ size. This JNK stripe influences proliferation in a non-canonical, Jun-independent manner by inhibiting the Hippo pathway. Localized JNK activity is established by Hedgehog signaling, where Ci elevates dTRAF1 expression. As the dTRAF1 homolog, TRAF4, is amplified in numerous cancers, these findings provide a new mechanism for how the Hedgehog pathway could contribute to tumorigenesis, and, more importantly, provides a new strategy for cancer therapies. Finally, modulation of JNK signaling centers in developing antennae and legs changes their sizes, suggesting a more generalizable role for JNK signaling in developmental organ size control. DOI:http://dx.doi.org/10.7554/eLife.11491.001 A key challenge in biology is to understand what determines size. As an animal grows, signals are produced that control the size of its organs. Many of the signaling pathways that regulate size during normal animal development also contribute to the formation of tumors. Therefore, it is important to find out exactly how the signaling molecules that regulate size are linked to those that regulate tumor growth. A protein called JNK activates a signaling pathway that triggers tumor growth. JNK signaling also stimulates cells to multiply in tissues that need repair, but it is not known whether it also regulates the size of organs during animal development. Here, Willsey et al. investigate whether JNK is active in the developing wings of fruit flies, which are commonly used as models of animal development. The experiments show that JNK is active in a stripe across the developing wing and is required for the wing to grow to its proper size. A master signal protein called Hedgehog is responsible for establishing this stripe of JNK activity. Unexpectedly, rather than acting through its usual signaling pathway, JNK activates the Hippo pathway in the wing to control organ size during development. Willsey et al.’s findings highlight potential new targets for cancer therapies. A future challenge will be to find out whether small patches of JNK signaling are found in the developing organs of other animals, and whether they can help explain how size changes between species. DOI:http://dx.doi.org/10.7554/eLife.11491.002
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Affiliation(s)
- Helen Rankin Willsey
- Department of Genetics, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, United States
| | - Xiaoyan Zheng
- Departments of Biochemistry and Developmental Biology, Institute for Stem Cell Biology and Regenerative Medicine, Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, United States
| | - José Carlos Pastor-Pareja
- Department of Genetics, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, United States
| | - A Jeremy Willsey
- Department of Psychiatry, University of California, San Francisco, San Francisco, United States
| | - Philip A Beachy
- Departments of Biochemistry and Developmental Biology, Institute for Stem Cell Biology and Regenerative Medicine, Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, United States
| | - Tian Xu
- Department of Genetics, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, United States.,State Key Laboratory of Genetic Engineering and National Center for International Research, Fudan-Yale Biomedical Research Center, Institute of Developmental Biology and Molecular Medicine, School of Life Sciences, Fudan University, Shanghai, China
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Yang J, Wei D, Wang W, Shen B, Xu S, Cao Y. TRAF4 enhances oral squamous cell carcinoma cell growth, invasion and migration by Wnt-β-catenin signaling pathway. Int J Clin Exp Pathol 2015; 8:11837-11846. [PMID: 26617938 PMCID: PMC4637754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 07/17/2015] [Indexed: 06/05/2023]
Abstract
Oral squamous cell carcinoma (OSCC) ranks as the fifth most common cancer worldwide with poor prognosis. Recently, tumor necrosis factor receptor-associated factor 4 (TRAF4) has attracted increasing attenuation due to its overexpression in certain cancers. However, its function and underlying mechanism in OSCC remains elusive. In this study, the high expression of TRAF4 mRNA and protein levels was noted in OSCC cell lines. Its overexpression with pcDNA3.1-TRAF4 vector transfection dramatically promoted cell proliferation and inhibited cell apoptosis, indicating a pivotal role of TRAF4 in OSCC cell growth. Simultaneously, TRAF4 elevation also increased cell invasion and migration. Mechanism analysis confirmed that TRAF4 up-regulation induced the expression of β-catenin and the downstream target molecules of cyclinD1, c-myc, Bcl-2, MMP-9 and MMP-2, indicating that TRAF4 could induce the activation of Wnt/β-catenin pathway. After pretreatment with β-catenin siRNA, the pathway was remarkably silenced. Simultaneously, cell growth, invasion and migration induced by TRAF4 were strikingly abrogated, suggesting that TRAF4 may promote OSCC cell growth, invasion and migration by Wnt/β-catenin pathway. Together, this study confirmed that TRAF4 acts as an oncogene for the development and progression of OSCC. Therefore, our study may support a promising therapeutic target for the treatment of OSCC.
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Affiliation(s)
- Jianbin Yang
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Xinxiang Medial UniversityWeihui 453100, China
| | - Dongyi Wei
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Xinxiang Medial UniversityWeihui 453100, China
| | - Weixin Wang
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Xinxiang Medial UniversityWeihui 453100, China
| | - Baohong Shen
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Xinxiang Medial UniversityWeihui 453100, China
| | - Suling Xu
- Department of Oncology, The First Affiliated Hospital of Xinxiang Medial UniversityWeihui 453100, China
| | - Yuan Cao
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Xinxiang Medial UniversityWeihui 453100, China
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Zhao ZJ, Ren HY, Yang F, Wang J, Wu GP, Mi XY. Expression, correlation, and prognostic value of TRAF2 and TRAF4 expression in malignant plural effusion cells in human breast cancer. Diagn Cytopathol 2015; 43:897-903. [PMID: 26331901 DOI: 10.1002/dc.23330] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 07/11/2015] [Accepted: 08/05/2015] [Indexed: 12/19/2022]
Abstract
BACKGROUND TRAF2 and TRAF4, members of the tumor necrosis factor receptor- associated factor family of intracellular signal transduction proteins, are associated with breast cancer progression and metastasis. METHODS We collected malignant serous effusion cells from the patients with breast cancer (n = 46). Cell blocks prepared from plural effusions (n = 46) and primary breast cancer (n = 50), lymph node metastases (n = 50), and normal breast tissue specimens (n = 30). The immunohistochemistry was performed for the detection of TRAF2 and TRAF4 expression with the correlation of their expression with clinicopathological parameters and survival rate analyzed. RESULTS Compared with normal breast tissues, TRAF2 expression was upregulated, and nuclear TRAF4 expression was downregulated in malignant pleural effusion cells, primary tumors, and lymph node metastases (P < 0.05). Multivariate analysis revealed TRAF2 expression in pleural effusions was associated with the molecular/pathological type, venous invasion, and lymph node metastasis, while nuclear TRAF4 expression was associated with age, tumor size, venous invasion, and lymph node metastasis, clinical staging, molecular/pathological subtype and p53 status (P < 0.05). There was a significant positive correlation between TRAF2 and TRAF4 expression levels in malignant pleural effusion cells (r = 0.937; P < 0.01). Kaplan-Meire analysis demonstrated a close correlation of TRAF2 and TRAF4 expression in malignant pleural effusion cells with cumulative overall survival (P < 0.05). CONCLUSION TRAF2 and nuclear TRAF4 expression in malignant pleural effusion cells may represent potential prognostic factors and biomarkers of invasion and metastasis in breast cancer.
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Affiliation(s)
- Zhi-Juan Zhao
- Department of Pathology, the First Affiliated Hospital and College of Basic Medical Sciences, China Medical University, Shenyang, Liaoning, China
| | - Hua-Yan Ren
- Department of Pathology, the First Affiliated Hospital and College of Basic Medical Sciences, China Medical University, Shenyang, Liaoning, China
| | - Fan Yang
- Department of Pathology, the First Affiliated Hospital and College of Basic Medical Sciences, China Medical University, Shenyang, Liaoning, China
| | - Jian Wang
- Department of Pathology, the First Affiliated Hospital and College of Basic Medical Sciences, China Medical University, Shenyang, Liaoning, China
| | - Guang-Ping Wu
- Department of Pathology, the First Affiliated Hospital and College of Basic Medical Sciences, China Medical University, Shenyang, Liaoning, China
| | - Xiao-Yi Mi
- Department of Pathology, the First Affiliated Hospital and College of Basic Medical Sciences, China Medical University, Shenyang, Liaoning, China
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Zhang X, Wen Z, Mi X. Expression and anti-apoptotic function of TRAF4 in human breast cancer MCF-7 cells. Oncol Lett 2013; 7:411-414. [PMID: 24396457 PMCID: PMC3881200 DOI: 10.3892/ol.2013.1703] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2013] [Accepted: 11/12/2013] [Indexed: 11/12/2022] Open
Abstract
Tumor necrosis factor (TNF) receptor-associated factor 4 (TRAF4) was initially identified as a gene amplified and overexpressed in breast carcinoma. The present study investigated the expression and anti-apoptotic function of TRAF4 in human breast cancer MCF-7 cells. TRAF4 was found to be localized in the cytoplasm and nuclei of MCF-7 cells by immunofluorescence staining and western blotting. The expression of TRAF4 in normal MCF-10A breast cells was found to be lower than in MCF-7 and MDA-MB-231 breast cancer cells. Following TNF-α treatment, TRAF4 depletion by siRNA in the MCF-7 cells was observed to suppress cell proliferation and the nuclear expression of nuclear factor κB was significantly reduced. The percentage of early apoptotic cells in the MCF-7 cells was augmented upon TRAF4-knockdown, and an increase in G1 phase cells and a decrease in S phase cells was detected. These results indicate that TRAF4 has anti-apoptotic effects on apoptosis induced by TNF-α in MCF-7 cells.
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Affiliation(s)
- Xiaoli Zhang
- Department of Pathology, The First Affiliated Hospital and College of Basic Medical Sciences of China Medical University, Shenyang, Liaoning 110001, P.R. China ; Department of Assisted Reproduction, Shenyang Women's and Children's Hospital, Shenyang, Liaoning 110001, P.R. China
| | - Zhifeng Wen
- Department of Neurosurgery, The First Affiliated Hospital, China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Xiaoyi Mi
- Department of Pathology, The First Affiliated Hospital and College of Basic Medical Sciences of China Medical University, Shenyang, Liaoning 110001, P.R. China
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Yoon JH, Park HH. Preliminary X-ray crystallographic studies of the TRAF domain of human TRAF4. Acta Crystallogr Sect F Struct Biol Cryst Commun 2013; 69:1026-8. [PMID: 23989155 PMCID: PMC3758155 DOI: 10.1107/s1744309113021192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 07/30/2013] [Indexed: 11/10/2022]
Abstract
TNF receptor-associated factor (TRAF) proteins were initially identified as tumour necrosis factor receptor (TNFR)-interacting proteins that perform critical functions in the regulation of inflammation, antiviral responses and apoptosis. Although TRAF4 is a canonical TRAF protein, it contains a unique domain boundary and functions differently in the cell. In this study, the human TRAF4 TRAF domain, corresponding to amino acids 290-470, was overexpressed in Escherichia coli using engineered C-terminal His tags. The TRAF4 TRAF domain was then purified to homogeneity and crystallized at 293 K. Finally, X-ray diffraction data were collected to a resolution of 2.3 Å from a crystal belonging to space group P2(1)2(1)2(1), with unit-cell parameters a = 58.9, b = 87.9, c = 117.3 Å, α = β = γ = 90°.
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Affiliation(s)
- Jong Hwan Yoon
- School of Biotechnology and Graduate School of Biochemistry, Yeungnam University, Gyeungsan, Republic of Korea
| | - Hyun Ho Park
- School of Biotechnology and Graduate School of Biochemistry, Yeungnam University, Gyeungsan, Republic of Korea
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Niu F, Ru H, Ding W, Ouyang S, Liu ZJ. Structural biology study of human TNF receptor associated factor 4 TRAF domain. Protein Cell 2013; 4:687-94. [PMID: 23982741 DOI: 10.1007/s13238-013-3068-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Accepted: 08/05/2013] [Indexed: 01/02/2023] Open
Abstract
TRAF4 is a unique member of TRAF family, which is essential for innate immune response, nervous system and other systems. In addition to be an adaptor protein, TRAF4 was identified as a regulator protein in recent studies. We have determined the crystal structure of TRAF domain of TRAF4 (residues 292-466) at 2.60 Å resolution by X-ray crystallography method. The trimericly assembled TRAF4 resembles a mushroom shape, containing a super helical "stalk" which is made of three right-handed intertwined α helixes and a C-terminal "cap", which is divided at residue L302 as a boundary. Similar to other TRAFs, both intermolecular hydrophobic interaction in super helical "stalk" and hydrogen bonds in "cap" regions contribute directly to the formation of TRAF4 trimer. However, differing from other TRAFs, there is an additional flexible loop (residues 421-426), which contains a previously identified phosphorylated site S426 exposing on the surface. This S426 was reported to be phosphorylated by IKKα which is the pre-requisite for TRAF4-NOD2 complex formation and thus to inhibit NOD2-induced NF-κB activation. Therefore, the crystal structure of TRAF4-TRAF is valuable for understanding its molecular basis for its special function and provides structural information for further studies.
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Affiliation(s)
- Fengfeng Niu
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Heng Ru
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.,Institute of Molecular and Clinical Medicine, Kunming Medical University, Kunming, 650500, China
| | - Wei Ding
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Songying Ouyang
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Zhi-Jie Liu
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China. .,Institute of Molecular and Clinical Medicine, Kunming Medical University, Kunming, 650500, China.
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Wang X, Jin C, Tang Y, Tang LY, Zhang YE. Ubiquitination of tumor necrosis factor receptor-associated factor 4 ( TRAF4) by Smad ubiquitination regulatory factor 1 (Smurf1) regulates motility of breast epithelial and cancer cells. J Biol Chem 2013; 288:21784-92. [PMID: 23760265 DOI: 10.1074/jbc.m113.472704] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Smad ubiquitin regulatory factors (Smurfs) are HECT-domain ubiquitin E3 ligases that regulate diverse cellular processes, including normal and tumor cell migration. However, the underlying mechanism of the Smurfs' role in cell migration is not fully understood. Here we show that Smurf1 induces ubiquitination of tumor necrosis factor receptor-associated factor 4 (TRAF4) at K190. Using the K190R mutant of TRAF4, we demonstrate that Smurf1-induced ubiquitination is required for proper localization of TRAF4 to tight junctions in confluent epithelial cells. We further show that TRAF4 is essential for the migration of both normal mammary epithelial and breast cancer cells. The ability of TRAF4 to promote cell migration is also dependent on Smurf1-mediated ubiquitination, which is associated with Rac1 activation by TRAF4. These results reveal a new regulatory circuit for cell migration, consisting of Smurf1-mediated ubiquitination of TRAF4 and Rac1 activation.
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Affiliation(s)
- Xiangchun Wang
- Laboratory of Cellular and Molecular Biology, Center for Cancer Research, NCI, National Institutes of Health, Bethesda, Maryland 20892, USA
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