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Renna FJ, Gonzalez CD, Vaccaro MI. Decoding the Versatile Landscape of Autophagic Protein VMP1 in Cancer: A Comprehensive Review across Tissue Types and Regulatory Mechanisms. Int J Mol Sci 2024; 25:3758. [PMID: 38612567 PMCID: PMC11011780 DOI: 10.3390/ijms25073758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 03/22/2024] [Accepted: 03/25/2024] [Indexed: 04/14/2024] Open
Abstract
Autophagy, a catabolic process orchestrating the degradation of proteins and organelles within lysosomes, is pivotal for maintaining cellular homeostasis. However, its dual role in cancer involves preventing malignant transformation while fostering progression and therapy resistance. Vacuole Membrane Protein 1 (VMP1) is an essential autophagic protein whose expression, per se, triggers autophagy, being present in the whole autophagic flux. In pancreatic cancer, VMP1-whose expression is linked to the Kirsten Rat Sarcoma Virus (KRAS) oncogene-significantly contributes to disease promotion, progression, and chemotherapy resistance. This investigation extends to breast cancer, colon cancer, hepatocellular carcinoma, and more, highlighting VMP1's nuanced nature, contingent on specific tissue contexts. The examination of VMP1's interactions with micro-ribonucleic acids (miRNAs), including miR-21, miR-210, and miR-124, enhances our understanding of its regulatory network in cancer. Additionally, this article discusses VMP1 gene fusions, especially with ribosomal protein S6 kinase B1 (RPS6KB1), shedding light on potential implications for tumor malignancy. By deciphering the molecular mechanisms linking VMP1 to cancer progression, this exploration paves the way for innovative therapeutic strategies to disrupt these pathways and potentially improve treatment outcomes.
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Affiliation(s)
- Felipe J. Renna
- Instituto de Bioquimica y Medicina Molecular Prof Alberto Boveris (IBIMOL), CONICET, Universidad de Buenos Aires, Buenos Aires C1113AAC, Argentina;
| | - Claudio D. Gonzalez
- Instituto de Investigaciones, IUC, Medicina Traslacional, Hospital Universitario CEMIC, Buenos Aires C1431FWN, Argentina;
| | - Maria I. Vaccaro
- Instituto de Bioquimica y Medicina Molecular Prof Alberto Boveris (IBIMOL), CONICET, Universidad de Buenos Aires, Buenos Aires C1113AAC, Argentina;
- Instituto de Investigaciones, IUC, Medicina Traslacional, Hospital Universitario CEMIC, Buenos Aires C1431FWN, Argentina;
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2
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Lin W, Sun Y, Qiu X, Huang Q, Kong L, Lu JJ. VMP1, a novel prognostic biomarker, contributes to glioma development by regulating autophagy. J Neuroinflammation 2021; 18:165. [PMID: 34311746 PMCID: PMC8311950 DOI: 10.1186/s12974-021-02213-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 07/07/2021] [Indexed: 01/11/2023] Open
Abstract
Background Malignant glioma, especially glioblastoma, is a highly aggressive disease with a dismal prognosis. Vacuole membrane protein 1 (VMP1) is a critical autophagy-associated protein with roles in oncogenesis and tumor progression. However, the contribution of VMP1 to glioma development as well as its prognostic value has not been established. Methods The expression of VMP1 and clinicopathologic data for 1996 glioma samples were collected from authoritative public databases to explore its prognostic value. Lentiviral CRISPR-Cas9 gene editing system was performed to deplete VMP1 expression. Apoptosis assays, cell cycle assays, colony formation assays, and EdU incorporation analysis were conducted to validate the biological function of VMP1. Transmission electron microscopy was used to determine the role of VMP1 in regulating autophagy. Results VMP1 overexpression was associated with advanced disease and had a poor prognosis in patients with glioma. The depletion of VMP1 by CRISPR-Cas9 gene editing significantly inhibited cell proliferation, increased cell death, and induced cell cycle arrest. Mechanistically, VMP1 knockout blocked autophagic flux and thus sensitized glioma cells to radiotherapy and chemotherapy. Moreover, a nomogram model showed that VMP1 expression has high prognostic value for determining survival in glioma. Conclusions Our results provide insights into the pathological and biological functions of VMP1, including its roles in promoting tumor growth and progression, and support its value as a new diagnostic and prognostic biomarker for glioma.
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Affiliation(s)
- Wanzun Lin
- Department of Radiation Oncology, Shanghai Proton and Heavy Ion Center, Fudan University Cancer Hospital, 4365 Kangxin Rd, Pudong, Shanghai, 201321, China.,Shanghai Key Laboratory of Radiation Oncology (20dz2261000), Shanghai, 201321, China.,Shanghai Engineering Research Center of Proton and Heavy Ion Radiation Therapy, Shanghai, 201321, China
| | - Yun Sun
- Shanghai Key Laboratory of Radiation Oncology (20dz2261000), Shanghai, 201321, China.,Shanghai Engineering Research Center of Proton and Heavy Ion Radiation Therapy, Shanghai, 201321, China.,Department of Radiation Oncology, Shanghai Proton and Heavy Ion Center, 4365 Kangxin Rd, Pudong, Shanghai, 201321, China
| | - Xianxin Qiu
- Shanghai Key Laboratory of Radiation Oncology (20dz2261000), Shanghai, 201321, China.,Shanghai Engineering Research Center of Proton and Heavy Ion Radiation Therapy, Shanghai, 201321, China.,Department of Radiation Oncology, Shanghai Proton and Heavy Ion Center, 4365 Kangxin Rd, Pudong, Shanghai, 201321, China
| | - Qingting Huang
- Shanghai Key Laboratory of Radiation Oncology (20dz2261000), Shanghai, 201321, China.,Shanghai Engineering Research Center of Proton and Heavy Ion Radiation Therapy, Shanghai, 201321, China.,Department of Radiation Oncology, Shanghai Proton and Heavy Ion Center, 4365 Kangxin Rd, Pudong, Shanghai, 201321, China
| | - Lin Kong
- Department of Radiation Oncology, Shanghai Proton and Heavy Ion Center, Fudan University Cancer Hospital, 4365 Kangxin Rd, Pudong, Shanghai, 201321, China. .,Shanghai Key Laboratory of Radiation Oncology (20dz2261000), Shanghai, 201321, China. .,Shanghai Engineering Research Center of Proton and Heavy Ion Radiation Therapy, Shanghai, 201321, China.
| | - Jiade J Lu
- Shanghai Key Laboratory of Radiation Oncology (20dz2261000), Shanghai, 201321, China. .,Shanghai Engineering Research Center of Proton and Heavy Ion Radiation Therapy, Shanghai, 201321, China. .,Department of Radiation Oncology, Shanghai Proton and Heavy Ion Center, 4365 Kangxin Rd, Pudong, Shanghai, 201321, China.
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Lu JF, Hu ZQ, Yang MX, Liu WY, Pan GF, Ding JB, Liu JZ, Tang L, Hu B, Li HC. Downregulation of PDGF-D Inhibits Proliferation and Invasion in Breast Cancer MDA-MB-231 Cells. Clin Breast Cancer 2021; 22:e173-e183. [PMID: 34272173 DOI: 10.1016/j.clbc.2021.06.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 05/06/2021] [Accepted: 06/04/2021] [Indexed: 02/06/2023]
Abstract
BACKGROUND The platelet derived growth factor-D (PDGF-D) plays an important role in breast tumor aggressiveness. However, limited study has investigated the effect of silencing PDGF-D on the biological function of breast cancer. The purpose of this study is to clarify the potential value of PDGF-D as a target for breast cancer treatment. METHODS Reverse transcription-polymerase chain reaction and western blot were used to detect PDGF-D expression in 5 different breast cancer cells. The lentiviral vector was usd to silence PDGF-D in MDA-MB-231 cells. Then, Methyl Thiazolyl Tetrazolium was used to detect cell viability, 5-Ethynyl-2'- deoxyuridine and a soft agar assay were used to detect cell proliferation and clonality. Additionally, cell apoptosis after PDGF-D knockdown was measured by Annexin V/ Prodium Iodide staining, and cell migration was detected by trans-well assay. Survival rate and tumor size were measured by nude mice transplantation. RESULTS The MDA-MB-231 and SK-BR-3 cell lines showed higher PDGF-D expression than the MCF7 cell lines (P<.05). After the PDGF-D gene was silenced, the growth and colony forming abilitys ignificantly decreased (P<.05) together with the induction of apoptosis in MDA-MB-231 cells (P<.05). Moreover, MDA-MB-231 cells with PDGF-D silencing showed significantly diminished aggressive migration and invasion potential compared to other cells (P<.05). In vivo experiments also indicated that PDGF-D silencing inhibited tumor growth and improved the survival rate of tumor-bearing mice. CONCLUSION Downregulation of PDGF-D had dramatic effects on breast cancer cell proliferation, apoptosis and migration, which indicates that it plays an important role in breast cancer development and progression.
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Affiliation(s)
- Jing-Feng Lu
- Department of General Surgery, Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai 201100, China
| | - Zhi-Qiu Hu
- Department of General Surgery, Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai 201100, China
| | - Meng-Xuan Yang
- Department of General Surgery, Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai 201100, China
| | - Wei-Yan Liu
- Department of General Surgery, Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai 201100, China
| | - Gao-Feng Pan
- Department of General Surgery, Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai 201100, China
| | - Jun-Bin Ding
- Department of General Surgery, Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai 201100, China
| | - Jia-Zhe Liu
- Department of General Surgery, Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai 201100, China
| | - Lang Tang
- Department of Ultrasonography Department, Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai 201100, China
| | - Bin Hu
- Department of Ultrasonography Department, Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai 201100, China.
| | - Hong-Chang Li
- Department of General Surgery, Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai 201100, China.
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Yu C, Wong EM, Joo JE, Hodge AM, Makalic E, Schmidt D, Buchanan DD, Severi G, Hopper JL, English DR, Giles GG, Southey MC, Dugué PA. Epigenetic Drift Association with Cancer Risk and Survival, and Modification by Sex. Cancers (Basel) 2021; 13:cancers13081881. [PMID: 33919912 PMCID: PMC8070898 DOI: 10.3390/cancers13081881] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/09/2021] [Accepted: 04/10/2021] [Indexed: 01/13/2023] Open
Abstract
Simple Summary Ageing is the strongest cancer risk factor, and men and women exhibit different risk profiles in terms of incidence and survival. DNA methylation is known to strongly vary by age and sex. Epigenetic drift refers to age-related DNA methylation changes and the tendency for increasing discordance between epigenomes over time, but it remains unknown to what extent the epigenetic drift contributes to cancer risk and survival. The aims of this study were to identify age-associated, sex-associated and sexually dimorphic age-associated (age-by-sex-associated) DNA methylation markers and investigate whether age- and age-by-sex-associated markers are associated with cancer risk and survival. Our study, which used a total of 2754 matched case–control pairs with DNA methylation in pre-diagnostic blood, is the first large study to examine the association between sex-specific epigenetic drift and cancer development and progression. The results may be useful for cancer early diagnosis and prediction of prognosis. Abstract To investigate age- and sex-specific DNA methylation alterations related to cancer risk and survival, we used matched case–control studies of colorectal (n = 835), gastric (n = 170), kidney (n = 143), lung (n = 332), prostate (n = 869) and urothelial (n = 428) cancers, and mature B-cell lymphoma (n = 438). Linear mixed-effects models were conducted to identify age-, sex- and age-by-sex-associated methylation markers using a discovery (controls)-replication (cases) strategy. Replication was further examined using summary statistics from Generation Scotland (GS). Associations between replicated markers and risk of and survival from cancer were assessed using conditional logistic regression and Cox models (hazard ratios (HR)), respectively. We found 32,659, 23,141 and 48 CpGs with replicated associations for age, sex and age-by-sex, respectively. The replication rates for these CpGs using GS summary data were 94%, 86% and 91%, respectively. Significant associations for cancer risk and survival were identified at some individual age-related CpGs. Opposite to previous findings using epigenetic clocks, there was a strong negative trend in the association between epigenetic drift and risk of colorectal cancer. Methylation at two CpGs overlapping TMEM49 and ARX genes was associated with survival of overall (HR = 0.91, p = 7.7 × 10−4) and colorectal (HR = 1.52, p = 1.8 × 10−4) cancer, respectively, with significant age-by-sex interaction. Our results may provide markers for cancer early detection and prognosis prediction.
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Affiliation(s)
- Chenglong Yu
- Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, VIC 3168, Australia; (C.Y.); (E.M.W.); (G.G.G.); (M.C.S.)
| | - Ee Ming Wong
- Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, VIC 3168, Australia; (C.Y.); (E.M.W.); (G.G.G.); (M.C.S.)
- Department of Clinical Pathology, Melbourne Medical School, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Jihoon Eric Joo
- Colorectal Oncogenomics Group, Department of Clinical Pathology, Melbourne Medical School, The University of Melbourne, Parkville, VIC 3010, Australia; (J.E.J.); (D.D.B.)
- University of Melbourne Centre for Cancer Research, Victorian Comprehensive Cancer Centre, Parkville, VIC 3010, Australia
| | - Allison M. Hodge
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, VIC 3004, Australia; (A.M.H.); (D.R.E.)
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Parkville, VIC 3010, Australia; (E.M.); (D.S.); (J.L.H.)
| | - Enes Makalic
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Parkville, VIC 3010, Australia; (E.M.); (D.S.); (J.L.H.)
| | - Daniel Schmidt
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Parkville, VIC 3010, Australia; (E.M.); (D.S.); (J.L.H.)
| | - Daniel D. Buchanan
- Colorectal Oncogenomics Group, Department of Clinical Pathology, Melbourne Medical School, The University of Melbourne, Parkville, VIC 3010, Australia; (J.E.J.); (D.D.B.)
- University of Melbourne Centre for Cancer Research, Victorian Comprehensive Cancer Centre, Parkville, VIC 3010, Australia
- Genomic Medicine and Family Cancer Clinic, Royal Melbourne Hospital, Parkville, VIC 3000, Australia
| | - Gianluca Severi
- Centre de Recherche en Epidémiologie et Santé des Populations (CESP, Inserm U1018), Facultés de Médecine Universités Paris-Saclay, UVSQ, Gustave Roussy, 94805 Villejuif, France;
- Department of Statistics, Computer Science and Applications “G. Parenti”, University of Florence, 50121 Firenze, Italy
| | - John L. Hopper
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Parkville, VIC 3010, Australia; (E.M.); (D.S.); (J.L.H.)
| | - Dallas R. English
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, VIC 3004, Australia; (A.M.H.); (D.R.E.)
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Parkville, VIC 3010, Australia; (E.M.); (D.S.); (J.L.H.)
| | - Graham G. Giles
- Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, VIC 3168, Australia; (C.Y.); (E.M.W.); (G.G.G.); (M.C.S.)
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, VIC 3004, Australia; (A.M.H.); (D.R.E.)
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Parkville, VIC 3010, Australia; (E.M.); (D.S.); (J.L.H.)
| | - Melissa C. Southey
- Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, VIC 3168, Australia; (C.Y.); (E.M.W.); (G.G.G.); (M.C.S.)
- Department of Clinical Pathology, Melbourne Medical School, The University of Melbourne, Parkville, VIC 3010, Australia
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, VIC 3004, Australia; (A.M.H.); (D.R.E.)
| | - Pierre-Antoine Dugué
- Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, VIC 3168, Australia; (C.Y.); (E.M.W.); (G.G.G.); (M.C.S.)
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, VIC 3004, Australia; (A.M.H.); (D.R.E.)
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Parkville, VIC 3010, Australia; (E.M.); (D.S.); (J.L.H.)
- Correspondence:
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Liu YF, Luo D, Li X, Li ZQ, Yu X, Zhu HW. PVT1 Knockdown Inhibits Autophagy and Improves Gemcitabine Sensitivity by Regulating the MiR-143/HIF-1α/VMP1 Axis in Pancreatic Cancer. Pancreas 2021; 50:227-234. [PMID: 33565800 DOI: 10.1097/mpa.0000000000001747] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVES Elucidation of the regulatory mechanisms of gemcitabine sensitivity is needed to improve the therapeutic effects of this drug in pancreatic cancer. METHODS PANC-1 cells were transfected with small hairpin RNA against PVT1 or microRNA (miR)-143 mimics or inhibitor. The gemcitabine sensitivity of pancreatic cancer was evaluated. Autophagosomes were analyzed with an immunofluorescence assay. Cell viability and proliferation were examined with MTT assays. Quantitative reverse transcription-polymerase chain reaction and Western blotting were used to analyze the expression of PVT1, miR-143, HIF-1α, VMP1, LC3I/II, p62, and Beclin-1. The interactions of PVT1/miR-143 and miR-143/HIF-1α were assessed by dual-luciferase reporter assays. RESULTS PVT1 was upregulated while miR-143 was downregulated in pancreatic cancer. Both PVT1 knockdown and miR-143 overexpression suppressed autophagy and improved gemcitabine sensitivity in pancreatic cancer. PVT1 directly sponged miR-143 to regulate HIF-1α expression. MiR-143 inhibitor reversed the effect of PVT1 knockdown on autophagy and gemcitabine sensitivity. CONCLUSIONS PVT1 knockdown inhibited autophagy and improved gemcitabine sensitivity via the miR-143/HIF-1α/VMP1 axis in pancreatic cancer. Our investigation elucidated a novel regulatory mechanism of gemcitabine sensitivity and may contribute to improve the therapeutic effects of chemotherapy drugs on pancreatic cancer.
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Affiliation(s)
- Yun-Fei Liu
- From the Departments of Hepatobiliary and Pancreatic Surgery II
| | - Dong Luo
- From the Departments of Hepatobiliary and Pancreatic Surgery II
| | - Xia Li
- Endocrinology, Third Xiangya Hospital, Central South University, Changsha, China
| | - Zhi-Qiang Li
- From the Departments of Hepatobiliary and Pancreatic Surgery II
| | - Xiao Yu
- From the Departments of Hepatobiliary and Pancreatic Surgery II
| | - Hong-Wei Zhu
- From the Departments of Hepatobiliary and Pancreatic Surgery II
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Gu J, Wang Y, Liu Y, Shi M, Yin L, Hou Y, Zhou Y, Chu Wong CK, Chen D, Guo Z, Shi H. Inhibition of Autophagy Alleviates Cadmium-Induced Mouse Spleen and Human B Cells Apoptosis. Toxicol Sci 2019; 170:109-122. [DOI: 10.1093/toxsci/kfz089] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Abstract
Cadmium (Cd) is a toxic heavy metal that can accumulate and cause severe damage to many organs, such as liver, kidney, lung, etc. Cd also significantly suppresses immunity, however, the underlying mechanism involved in Cd-induced immunnotoxicity is still unclear. The present study indicated that semichronic Cd exposure (7 days) induced apoptotic damage of mouse spleen. In human Ramos B cells, Cd exposure also induced apoptosis, which was dependent on Cd-induced vacuole membrane protein 1 (VMP1) expression and autophagy. Cd-induced autophagy and apoptosis were abated when VMP1 expression was knockdown. In addition, Cd-induced VMP1 expression, autophagy, and apoptosis were dependent on the elevation of Ca2+ and reactive oxygen species (ROS). More important, Cd exposure also induced VMP1 expression and autophagy in mouse spleen tissue, and the intraperitoneal injection of the autophagy inhibitor chloroquine (CQ) into mice effectively reduced Cd-induced spleen apoptotic damage. Taken together, these results indicate Cd-induced autophagy, promotes apoptosis in immune cells, and inhibition of autophagy can alleviate Cd-induced spleen and immune cell apoptosis. This study might provide the groundwork for future studies on Cd-induced immunomodulatory effects and immune diseases.
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Affiliation(s)
- Jie Gu
- Institute of Life Sciences, Jiangsu University
| | - Yanwei Wang
- Institute of Life Sciences, Jiangsu University
| | - Yanmin Liu
- Institute of Life Sciences, Jiangsu University
| | - Meilin Shi
- Institute of Life Sciences, Jiangsu University
| | - Liangdong Yin
- Department of Osteology, The Third Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu 212000, China
| | | | - Yang Zhou
- Institute of Life Sciences, Jiangsu University
| | | | - Dongfeng Chen
- Institute of Life Sciences, Jiangsu University
- Department of Rheumatology and Inflammation Research, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Zhigang Guo
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Science, Nanjing Normal University, Nanjing, Jiangsu 210023, China
| | - Haifeng Shi
- Institute of Life Sciences, Jiangsu University
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Zhang J, Kai L, Zhang W, Yin Y, Wang W. Association between genetic variants in p53 binding sites and risks of osteosarcoma in a Chinese population: a two-stage case-control study. Cancer Biol Ther 2018; 19:994-997. [PMID: 29595404 DOI: 10.1080/15384047.2018.1456607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Osteosarcoma (OS) is one of the most common bone malignancies in children and adolescents. To date, inaugural mechanism of OS was considered as a complex process and was still not clear. The p53 gene, most important tumor suppressors, was associated with risk of many tumors, including OS. In current study, we evaluated the relationship between genetic variation of the p53 binding site and the OS susceptibility through a two-stage case-control study in Chinese population. We found that rs1295925 (OR = 0.85; 95 CI = 0.76-0.94; P = 0.003) and rs3787547 (OR = 1.27; 95 CI = 1.11-1.45; P = 4.0 × 10-4) was significantly with OS susceptibility. Compared with those with rs1295925-TT genotype, and the risk of OS was significantly lower in individuals with CT genotype (OR = 0.77; 95 CI = 0.65-0.92) and CC genotype (OR = 0.75; 95 CI = 0.60-0.93). Compared with those with rs3787547-GG genotype, and the risk of OS was significantly higher in individuals with AG genotype (OR = 1.32; 95 CI = 1.10-1.58) and AA genotype (OR = 1.46; 95 CI = 1.11-1.92). To sum up, our results prove that SNP rs1295925 and rs3787547 play an important role in the etiology of OS, suggesting them as the potential genetic modifier for OS development.
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Affiliation(s)
- Jingzhe Zhang
- a Department of Orthopedics , China-Japan Union Hospital Of Jilin University , Changchun130033, Jilin Province , China
| | - Li Kai
- b Department of Anesthesiology , China-Japan Union Hospital Of Jilin University , Changchun130033, Jilin Province , China
| | - Wenlong Zhang
- c Department of Hematology , China-Japan Union Hospital Of Jilin University , Changchun130033, Jilin Province , China
| | - Yu Yin
- d Department of Neurology , China-Japan Union Hospital Of Jilin University , Changchun130033, Jilin Province , China
| | - Wenjun Wang
- a Department of Orthopedics , China-Japan Union Hospital Of Jilin University , Changchun130033, Jilin Province , China
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Bando SY, Iamashita P, Guth BE, dos Santos LF, Fujita A, Abe CM, Ferreira LR, Moreira-Filho CA. A hemolytic-uremic syndrome-associated strain O113:H21 Shiga toxin-producing Escherichia coli specifically expresses a transcriptional module containing dicA and is related to gene network dysregulation in Caco-2 cells. PLoS One 2017; 12:e0189613. [PMID: 29253906 PMCID: PMC5734773 DOI: 10.1371/journal.pone.0189613] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 11/29/2017] [Indexed: 01/22/2023] Open
Abstract
Shiga toxin-producing (Stx) Escherichia coli (STEC) O113:H21 strains are associated with human diarrhea and some of these strains may cause hemolytic uremic syndrome (HUS). The molecular mechanism underlying this capacity and the differential host cell response to HUS-causing strains are not yet completely understood. In Brazil O113:H21 strains are commonly found in cattle but, so far, were not isolated from HUS patients. Here we conducted comparative gene co-expression network (GCN) analyses of two O113:H21 STEC strains: EH41, reference strain, isolated from HUS patient in Australia, and Ec472/01, isolated from cattle feces in Brazil. These strains were cultured in fresh or in Caco-2 cell conditioned media. GCN analyses were also accomplished for cultured Caco-2 cells exposed to EH41 or Ec472/01. Differential transcriptome profiles for EH41 and Ec472/01 were not significantly changed by exposure to fresh or Caco-2 conditioned media. Conversely, global gene expression comparison of both strains cultured in conditioned medium revealed a gene set exclusively expressed in EH41, which includes the dicA putative virulence factor regulator. Network analysis showed that this set of genes constitutes an EH41 specific transcriptional module. PCR analysis in Ec472/01 and in other 10 Brazilian cattle-isolated STEC strains revealed absence of dicA in all these strains. The GCNs of Caco-2 cells exposed to EH41 or to Ec472/01 presented a major transcriptional module containing many hubs related to inflammatory response that was not found in the GCN of control cells. Moreover, EH41 seems to cause gene network dysregulation in Caco-2 as evidenced by the large number of genes with high positive and negative covariance interactions. EH41 grows slowly than Ec472/01 when cultured in Caco-2 conditioned medium and fitness-related genes are hypoexpressed in that strain. Therefore, EH41 virulence may be derived from its capacity for dysregulating enterocyte genome functioning and its enhanced enteric survival due to slow growth.
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Affiliation(s)
- Silvia Yumi Bando
- Department of Pediatrics, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP, Brazil
| | - Priscila Iamashita
- Department of Pediatrics, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP, Brazil
| | - Beatriz E. Guth
- Departament of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo, SP, Brazil
| | - Luis F. dos Santos
- Departament of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo, SP, Brazil
| | - André Fujita
- Department of Computer Science, Instituto de Matemática e Estatística, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Cecilia M. Abe
- Laboratory of Bacteriology, Butantan Institute, São Paulo, SP, Brazil
| | - Leandro R. Ferreira
- Department of Pediatrics, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP, Brazil
| | - Carlos Alberto Moreira-Filho
- Department of Pediatrics, Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP, Brazil
- * E-mail:
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9
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Mokarram P, Albokashy M, Zarghooni M, Moosavi MA, Sepehri Z, Chen QM, Hudecki A, Sargazi A, Alizadeh J, Moghadam AR, Hashemi M, Movassagh H, Klonisch T, Owji AA, Łos MJ, Ghavami S. New frontiers in the treatment of colorectal cancer: Autophagy and the unfolded protein response as promising targets. Autophagy 2017; 13:781-819. [PMID: 28358273 PMCID: PMC5446063 DOI: 10.1080/15548627.2017.1290751] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Colorectal cancer (CRC), despite numerous therapeutic and screening attempts, still remains a major life-threatening malignancy. CRC etiology entails both genetic and environmental factors. Macroautophagy/autophagy and the unfolded protein response (UPR) are fundamental mechanisms involved in the regulation of cellular responses to environmental and genetic stresses. Both pathways are interconnected and regulate cellular responses to apoptotic stimuli. In this review, we address the epidemiology and risk factors of CRC, including genetic mutations leading to the occurrence of the disease. Next, we discuss mutations of genes related to autophagy and the UPR in CRC. Then, we discuss how autophagy and the UPR are involved in the regulation of CRC and how they associate with obesity and inflammatory responses in CRC. Finally, we provide perspectives for the modulation of autophagy and the UPR as new therapeutic options for CRC treatment.
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Affiliation(s)
- Pooneh Mokarram
- a Colorectal Research Center and Department of Biochemistry , School of Medicine, Shiraz University of Medical Sciences , Shiraz , Iran
| | - Mohammed Albokashy
- b Department of Human Anatomy and Cell Science , Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba , Winnipeg , MB , Canada
| | - Maryam Zarghooni
- c Zabol University of Medical Sciences , Zabol , Iran.,d University of Toronto Alumni , Toronto , ON , Canada
| | - Mohammad Amin Moosavi
- e Department of Molecular Medicine , Institute of Medical Biotechnology, National Institute for Genetic Engineering and Biotechnology , Tehran , Iran
| | - Zahra Sepehri
- c Zabol University of Medical Sciences , Zabol , Iran
| | - Qi Min Chen
- b Department of Human Anatomy and Cell Science , Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba , Winnipeg , MB , Canada
| | | | | | - Javad Alizadeh
- b Department of Human Anatomy and Cell Science , Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba , Winnipeg , MB , Canada
| | - Adel Rezaei Moghadam
- b Department of Human Anatomy and Cell Science , Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba , Winnipeg , MB , Canada
| | - Mohammad Hashemi
- g Department of Clinical Biochemistry , School of Medicine, Zahedan University of Medical Sciences , Zahedan , Iran
| | - Hesam Movassagh
- h Department of Immunology , Rady Faculty of Health Sciences, College of Medicine, University of Manitoba , Winnipeg , MB , Canada
| | - Thomas Klonisch
- b Department of Human Anatomy and Cell Science , Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba , Winnipeg , MB , Canada
| | - Ali Akbar Owji
- i Department of Clinical Biochemistry , School of Medicine, Shiraz Medical University , Shiraz , Iran
| | - Marek J Łos
- j Małopolska Centre of Biotechnology , Jagiellonian University , Krakow , Poland ; LinkoCare Life Sciences AB , Sweden
| | - Saeid Ghavami
- b Department of Human Anatomy and Cell Science , Rady Faculty of Health Sciences, Max Rady College of Medicine, University of Manitoba , Winnipeg , MB , Canada.,k Health Policy Research Center , Shiraz University of Medical Sciences , Shiraz , Iran
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10
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TMEM49-related apoptosis and metastasis in ovarian cancer and regulated cell death. Mol Cell Biochem 2016; 416:1-9. [PMID: 27023910 DOI: 10.1007/s11010-016-2684-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 03/12/2016] [Indexed: 01/22/2023]
Abstract
Ovarian cancer is one of the greatest causes of cancer death in women. The association of TMEM49 and ovarian cancer is poorly defined. Here, we reported that TMEM49 was significantly increased in ovarian tumor tissues compared to ovarian normal tissues. Furthermore, down-regulation of TMEM49 through RNA interference inhibited cell proliferation and arrested G1/S transition in two ovarian cancer cell lines, OVCAR3 and A2780. More importantly, TMEM49 silencing induced cell apoptosis. Additionally, down-regulation of TMEM49 in ovarian cancer notably repressed cell invasion and adhesion. Further gene set enrichment analysis suggested that apoptosis and metastasis up related signal pathways were associated with the TMEM49 expression. Western blot revealed that the expression of Caspase3, Bad, and Bax were increased, while expression of MMP2, KLF10, and CXCL12 were reduced by TMEM49 knockdown. Since expression of TMEM49 seems to be associated with the apoptosis and metastasis up signaling pathways of ovarian cancer, and suppression of its expression can inhibit cancer cell growth and metastasis, TMEM49 may be a potential therapeutic target in human ovarian cancer.
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11
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Ek WE, Hedman ÅK, Enroth S, Morris AP, Lindgren CM, Mahajan A, Gustafsson S, Gyllensten U, Lind L, Johansson Å. Genome-wide DNA methylation study identifies genes associated with the cardiovascular biomarker GDF-15. Hum Mol Genet 2015; 25:817-27. [PMID: 26681806 DOI: 10.1093/hmg/ddv511] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 12/09/2015] [Indexed: 12/19/2022] Open
Abstract
Growth-differentiation factor 15 (GDF-15) is expressed in low to moderate levels in most healthy tissues and increases in response to inflammation. GDF-15 is associated with cardiovascular dysfunction and over-expressed in the myocardium of patients with myocardial infarction (MI). However, little is known about the function of GDF-15 in cardiovascular disease, and the underlying regulatory network of GDF-15 is not known. To investigate a possible association between GDF-15 levels and DNA methylation, we performed a genome-wide DNA methylation study of white blood cells in a population-based study (N = 717). Significant loci where replicated in an independent cohort (N = 963). We also performed a gene ontology (GO) enrichment analysis. We identified and replicated 16 CpG-sites (false discovery rate [FDR] < 0.05), at 11 independent loci including MIR21. MIR21 encodes a microRNA (miR-21) that has previously been shown to be associated with the development of heart disease. Interestingly, GDF15 mRNA contains a binding site for miR-21. Four sites were also differentially methylated in blood from participants previously diagnosed with MI and 14 enriched GO terms (FDR < 0.05, enrichment > 2) were identified, including 'cardiac muscle cell differentiation'. This study shows that GDF-15 levels are associated with differences in DNA methylation in blood cells, and a subset of the loci are also differentially methylated in participants with MI. However, there might be interactions between GDF-15 levels and methylation in other tissues not addressed in this study. These results provide novel links between GDF-15 and cardiovascular disease.
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Affiliation(s)
- Weronica E Ek
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, and
| | - Åsa K Hedman
- Department of Medical Sciences, Molecular epidemiology and Science for Life Laboratory, Uppsala University, Uppsala 75108, Sweden
| | - Stefan Enroth
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, and
| | - Andrew P Morris
- Department of Biostatistics, University of Liverpool, Liverpool L69 3BX, UK, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, UK and
| | - Cecilia M Lindgren
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, UK and
| | - Anubha Mahajan
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, UK and
| | - Stefan Gustafsson
- Department of Medical Sciences, Molecular epidemiology and Science for Life Laboratory, Uppsala University, Uppsala 75108, Sweden
| | - Ulf Gyllensten
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, and
| | - Lars Lind
- Department of Medical Sciences, Cardiovascular Epidemiology, Uppsala University Hospital, Uppsala 75185, Sweden
| | - Åsa Johansson
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, and
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12
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Zhang R, Shen C, Zhao L, Wang J, McCrae M, Chen X, Lu F. Dysregulation of host cellular genes targeted by human papillomavirus (HPV) integration contributes to HPV-related cervical carcinogenesis. Int J Cancer 2015; 138:1163-74. [PMID: 26417997 PMCID: PMC5057319 DOI: 10.1002/ijc.29872] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 09/09/2015] [Indexed: 01/16/2023]
Abstract
Integration of human papillomavirus (HPV) viral DNA into the human genome has been postulated as an important etiological event during cervical carcinogenesis. Several recent reports suggested a possible role for such integration‐targeted cellular genes (ITGs) in cervical carcinogenesis. Therefore, a comprehensive analysis of HPV integration events was undertaken using data collected from 14 publications, with 499 integration loci on human chromosomes included. It revealed that HPV DNA preferred to integrate into intragenic regions and gene‐dense regions of human chromosomes. Intriguingly, the host cellular genes nearby the integration sites were found to be more transcriptionally active compared with control. Furthermore, analysis of the integration sites in the human genome revealed that there were several integration hotspots although all chromosomes were represented. The ITGs identified were found to be enriched in tumor‐related terms and pathways using gene ontology and KEGG analysis. In line with this, three of six ITGs tested were found aberrantly expressed in cervical cancer tissues. Among them, it was demonstrated for the first time that MPPED2 could induce HeLa cell and SiHa cell G1/S transition block and cell proliferation retardation. Moreover, “knocking out” the integrated HPV fragment in HeLa cell line decreased expression of MYC located ∼500 kb downstream of the integration site, which provided the first experimental evidence supporting the hypothesis that integrated HPV fragment influence MYC expression via long distance chromatin interaction. Overall, the results of this comprehensive analysis implicated that dysregulation of ITGs caused by viral integration as possibly having an etiological involvement in cervical carcinogenesis. What's new? Human papillomavirus (HPV) integration into the host genome is associated with increased severity of cervical precancer, suggesting that it is an influential event in cervical carcinogenesis. However, whether the genomic sites affected by HPV integration are relevant to cervical cancer remains unclear. In this study, analysis of 499 loci showed preferred HPV integration into intragenic and gene‐rich chromosomal sites. Frequently, these sites were located near transcriptionally active regions. In addition, multiple HPV integration “hotspots” were identified, the majority of which contained cancer‐related genes, such as MYC and the potentially novel tumor suppressor MPPED2.
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Affiliation(s)
- Ruiyang Zhang
- Department of Microbiology and Infectious Disease Center, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, People's Republic of China
| | - Congle Shen
- Department of Microbiology and Infectious Disease Center, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, People's Republic of China
| | - Lijun Zhao
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing, People's Republic of China
| | - Jianliu Wang
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing, People's Republic of China
| | | | - Xiangmei Chen
- Department of Microbiology and Infectious Disease Center, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, People's Republic of China
| | - Fengmin Lu
- Department of Microbiology and Infectious Disease Center, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, People's Republic of China
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13
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Guo XZ, Ye XL, Xiao WZ, Wei XN, You QH, Che XH, Cai YJ, Chen F, Yuan H, Liu XJ, Yu MH. Downregulation of VMP1 confers aggressive properties to colorectal cancer. Oncol Rep 2015; 34:2557-66. [PMID: 26328607 DOI: 10.3892/or.2015.4240] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 08/07/2015] [Indexed: 11/05/2022] Open
Abstract
Vacuole membrane protein 1 (VMP1) was recently found to be involved in the process of tumor metastasis and is also considered to play a vital role in balancing apoptosis and autophagy. In the present study, the expression of VMP1 in colorectal cancer and matched adjacent non‑cancerous tissues was evaluated by immunohistochemistry (IHC) for studying the role of VMP1 in the process of colorectal cancer. Kaplan‑Meier analysis and the log-rank test were used to calculate the correlation of classic clinicopathological characteristics related to survival and the expression of VMP1. In vitro, a VMP1 stable gene silencing cell model was constructed using a lentiviral vector. The invasive ability and proliferation of colorectal cancer cells were evaluated by Transwell and MTT assays, respectively, and the underlying signaling pathway was explored by western blotting. Additionally, drug susceptibility to cisplatin, oxaliplatin and 5-FU was tested before and after VMP1 knockout. Finally, an animal model was constructed to explore the role of VMP1 in the physiopathologic process of colorectal cancer. Our results indicated that VMP1 showed increased expression in the adjacent non-cancer tissues compared with that in the colorectal cancer tissues. For different stages of colorectal cancer, expression of VMP1 had a negative correlation with the malignancy of the cancer. In clinical research, we also found that the median survival of patients with low VMP1 expression was much shorter than the survival of patients with high expression. In vitro, after infection with the lentivirus, cells with VMP1 knockout gained significant aggressive properties in regards to invasion and proliferation, and the mechanisms may be related to the activation of the PI3K/Akt/ZO-1/E-cadherin pathway. We also found that shVMP1 cells were more sensitive to 5-FU, but not cisplatin and oxaliplatin. Finally, we found a higher number of formed nodules in nude mice after intraperitoneal injection with shVMP1 cells in the in vivo study.
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Affiliation(s)
- Xian-Zhi Guo
- Department of Medical Oncology, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Pudong, Shanghai 201399, P.R. China
| | - Xiao-Lei Ye
- Drugs and Pharmacology Laboratory, Ningbo Institute of Medical Sciences, Ningbo, Zhejiang 315020, P.R. China
| | - Wei-Zhong Xiao
- Department of Internal Neurology, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Pudong, Shanghai 201399, P.R. China
| | - Xue-Ni Wei
- Department of Pharmacology, China Pharmaceutical University, Nanjing, Jiangsu 211198, P.R. China
| | - Qing-Hua You
- Department of Pathology, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Pudong, Shanghai 201399, P.R. China
| | - Xiao-Hang Che
- Drugs and Pharmacology Laboratory, Ningbo Institute of Medical Sciences, Ningbo, Zhejiang 315020, P.R. China
| | - Yan-Jun Cai
- Department of Internal Neurology, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Pudong, Shanghai 201399, P.R. China
| | - Fang Chen
- Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, P.R. China
| | - Hao Yuan
- Department of General Surgery, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Pudong, Shanghai 201399, P.R. China
| | - Xiao-Jian Liu
- Department of Medical Oncology, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Pudong, Shanghai 201399, P.R. China
| | - Ming-Hua Yu
- Department of Medical Oncology, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Pudong, Shanghai 201399, P.R. China
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14
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Li Z, Shi K, Guan L, Jiang Q, Yang Y, Xu C. Activation of p53 by sodium selenite switched human leukemia NB4 cells from autophagy to apoptosis. Oncol Res 2015; 21:325-31. [PMID: 25198662 DOI: 10.3727/096504014x14024160459087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
It was revealed by our previous research that sodium selenite repressed autophagy accompanied by the induction of apoptosis in human leukemia NB4 cells. The inhibition of autophagy exerted a facilitative effect on apoptosis. In the present study, we further explored the mechanisms underlying the switch from autophagy to apoptosis and elucidated p53 played a key role. Selenite induced phosphorylation of p53 at the vital site Ser15 via p38MAPK and ERK. Subsequently p53 dissociated with its inhibitory protein mouse double minute 2 (MDM2). Meanwhile, the nucleolar protein B23 transferred from the nucleolus to the nucleoplasm and associated with MDM2, probably stabilizing p53. The active p53 participated in the decrease of autophagic protein Beclin-1 and LC-3, as well as activation of apoptosis-related caspases. Furthermore, in p53 mutant U937 leukemia cells, selenite could not elicit such a switch from autophagy to apoptosis, laying emphasis on the crucial role p53 played in this process.
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Affiliation(s)
- Zhushi Li
- State Key Laboratory of Medical Molecular Biology, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences and School of Basic Medicine, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
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