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Shi Y, Wang M, Liu D, Ullah S, Ma X, Yang H, Liu B. Super-enhancers in esophageal carcinoma: Transcriptional addictions and therapeutic strategies. Front Oncol 2022; 12:1036648. [DOI: 10.3389/fonc.2022.1036648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Accepted: 10/10/2022] [Indexed: 11/13/2022] Open
Abstract
The tumorigenesis of esophageal carcinoma arises from transcriptional dysregulation would become exceptionally dependent on specific regulators of gene expression, which could be preferentially attributed to the larger non-coding cis-regulatory elements, i.e. super-enhancers (SEs). SEs, large genomic regulatory entity in close genomic proximity, are underpinned by control cancer cell identity. As a consequence, the transcriptional addictions driven by SEs could offer an Achilles’ heel for molecular treatments on patients of esophageal carcinoma and other types of cancer as well. In this review, we summarize the recent findings about the oncogenic SEs upon which esophageal cancer cells depend, and discuss why SEs could be seen as the hallmark of cancer, how transcriptional dependencies driven by SEs, and what opportunities could be supplied based on this cancer-specific SEs.
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Hai R, Yang D, Zheng F, Wang W, Han X, Bode AM, Luo X. The emerging roles of HDACs and their therapeutic implications in cancer. Eur J Pharmacol 2022; 931:175216. [PMID: 35988787 DOI: 10.1016/j.ejphar.2022.175216] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 08/03/2022] [Accepted: 08/12/2022] [Indexed: 12/25/2022]
Abstract
Deregulation of protein post-translational modifications is intensively involved in the etiology of diseases, including degenerative diseases, inflammatory injuries, and cancers. Acetylation is one of the most common post-translational modifications of proteins, and the acetylation levels are controlled by two mutually antagonistic enzyme families, histone acetyl transferases (HATs) and histone deacetylases (HDACs). HATs loosen the chromatin structure by neutralizing the positive charge of lysine residues of histones; whereas HDACs deacetylate certain histones, thus inhibiting gene transcription. Compared with HATs, HDACs have been more intensively studied, particularly regarding their clinical significance. HDACs extensively participate in the regulation of proliferation, migration, angiogenesis, immune escape, and therapeutic resistance of cancer cells, thus emerging as critical targets for clinical cancer therapy. Compared to HATs, inhibitors of HDAC have been clinically used for cancer treatment. Here, we enumerate and integratethe mechanisms of HDAC family members in tumorigenesis and cancer progression, and address the new and exciting therapeutic implications of single or combined HDAC inhibitor (HDACi) treatment.
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Affiliation(s)
- Rihan Hai
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, 410078, PR China; Cancer Research Institute, School of Basic Medicine, Central South University, Changsha, Hunan, 410078, PR China
| | - Deyi Yang
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, 410078, PR China; Cancer Research Institute, School of Basic Medicine, Central South University, Changsha, Hunan, 410078, PR China
| | - Feifei Zheng
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, 410078, PR China; Cancer Research Institute, School of Basic Medicine, Central South University, Changsha, Hunan, 410078, PR China
| | - Weiqin Wang
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, 410078, PR China; Cancer Research Institute, School of Basic Medicine, Central South University, Changsha, Hunan, 410078, PR China
| | - Xing Han
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, 410078, PR China; Cancer Research Institute, School of Basic Medicine, Central South University, Changsha, Hunan, 410078, PR China
| | - Ann M Bode
- The Hormel Institute, University of Minnesota, Austin, MN, 55912, USA
| | - Xiangjian Luo
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, 410078, PR China; Cancer Research Institute, School of Basic Medicine, Central South University, Changsha, Hunan, 410078, PR China; Hunan Key Laboratory of Oncotarget Gene, Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan, 410078, China; Key Laboratory of Biological Nanotechnology of National Health Commission, Central South University, Changsha, Hunan, 410078, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410078, China.
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3
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Liu Y, Wang R, Han H, Li L. Tubastatin A suppresses the proliferation of fibroblasts in epidural fibrosis through phosphatidylinositol-3-kinase/protein kinase B/mammalian target of rapamycin (PI3K/AKT/mTOR) signalling pathway. J Pharm Pharmacol 2022; 74:rgab106. [PMID: 35230444 DOI: 10.1093/jpp/rgab106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 02/21/2022] [Indexed: 11/12/2022]
Abstract
OBJECTIVES This study was designed to explore the effect of tubastatin A (Tub A) on epidural fibrosis and the underlying mechanism. METHODS Histone deacetylase 6 (HDAC6)-overexpressed fibroblasts were constructed, and the effect of Tub A on the proliferation of activated fibroblasts was detected by Cell Counting Kit-8, 5-ethynyl-2'-deoxyuridine (EdU) and cell cycle assay. Besides, 20 Sprague-Dawley rats were subjected to animal laminectomy model construction and then randomly treated with 4% dimethyl sulfoxide (DMSO) (diluted in 0.9% saline) or Tub A (10 mg/kg/day), separately. The expression of HDAC6 and phosphatidylinositol-3-kinase/protein kinase B/mammalian target of rapamycin (PI3K/AKT/mTOR) pathway-related proteins was measured in epidural fibrosis tissues. KEY FINDINGS HDAC6 was overexpressed in activated fibroblasts and epidural scar tissues of rat models. Cell proliferation was remarkably elevated in HDAC6-overexpressed fibroblasts, which was reflected by cell viability, EdU and flow cytometry-based cell cycle assay, and paralleled with the increased expression of phosphorylated PI3K, AKT and mTOR, which was remarkably reversed following Tub A treatment. 740Y-P activator addition significantly reversed the declined fibroblast proliferation induced by Tub A. The expressions of PI3K/AKT/mTOR pathway-related proteins were also reduced in epidural tissues in rat models with Tub A treatment. CONCLUSION Tub A could prevent epidural fibrosis formation by inhibiting fibroblast proliferation through mediating PI3K/AKT/mTOR pathway.
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Affiliation(s)
- Yang Liu
- Department of Spine Surgery, Weifang People's Hospital, Weifang, Shandong, China
| | - Ruihong Wang
- Department of Spine Surgery, Weifang People's Hospital, Weifang, Shandong, China
| | - Huimin Han
- Department of Spine Surgery, Weifang People's Hospital, Weifang, Shandong, China
| | - Li Li
- Department of Spine Surgery, Weifang People's Hospital, Weifang, Shandong, China
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4
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Liao L, Yao Z, Fang W, He Q, Xu WW, Li B. Epigenetics in Esophageal Cancer: From Mechanisms to Therapeutics. SMALL METHODS 2020; 4:2000391. [DOI: 10.1002/smtd.202000391] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Indexed: 02/05/2023]
Affiliation(s)
- Long Liao
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes Institute of Life and Health Engineering College of Life Science and Technology Jinan University Guangzhou 510632 China
| | - Zi‐Ting Yao
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes Institute of Life and Health Engineering College of Life Science and Technology Jinan University Guangzhou 510632 China
| | - Wang‐Kai Fang
- The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area Department of Biochemistry and Molecular Biology Shantou University Medical College Shantou 515041 China
| | - Qing‐Yu He
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes Institute of Life and Health Engineering College of Life Science and Technology Jinan University Guangzhou 510632 China
| | - Wen Wen Xu
- MOE Key Laboratory of Tumor Molecular Biology and Guangdong Provincial Key Laboratory of Bioengineering Medicine National Engineering Research Center of Genetic Medicine Institute of Biomedicine College of Life Science and Technology Jinan University Guangzhou 510632 China
| | - Bin Li
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes Institute of Life and Health Engineering College of Life Science and Technology Jinan University Guangzhou 510632 China
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5
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Banik D, Noonepalle S, Hadley M, Palmer E, Gracia-Hernandez M, Zevallos-Delgado C, Manhas N, Simonyan H, Young CN, Popratiloff A, Chiappinelli KB, Fernandes R, Sotomayor EM, Villagra A. HDAC6 Plays a Noncanonical Role in the Regulation of Antitumor Immune Responses, Dissemination, and Invasiveness of Breast Cancer. Cancer Res 2020; 80:3649-3662. [PMID: 32605998 PMCID: PMC7484424 DOI: 10.1158/0008-5472.can-19-3738] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 03/27/2020] [Accepted: 06/24/2020] [Indexed: 12/24/2022]
Abstract
Despite the outstanding clinical results of immune checkpoint blockade (ICB) in melanoma and other cancers, clinical trials in breast cancer have reported low responses to these therapies. Current efforts are now focused on improving the treatment efficacy of ICB in breast cancer using new combination designs such as molecularly targeted agents, including histone deacetylase inhibitors (HDACi). These epigenetic drugs have been widely described as potent cytotoxic agents for cancer cells. In this work, we report new noncanonical regulatory properties of ultra-selective HDAC6i over the expression and function of epithelial-mesenchymal transition pathways and the invasiveness potential of breast cancer. These unexplored roles position HDAC6i as attractive options to potentiate ongoing immunotherapeutic approaches. These new functional activities of HDAC6i involved regulation of the E-cadherin/STAT3 axis. Pretreatment of tumors with HDAC6i induced critical changes in the tumor microenvironment, resulting in improved effectiveness of ICB and preventing dissemination of cancer cells to secondary niches. Our results demonstrate for the first time that HDAC6i can both improve ICB antitumor immune responses and diminish the invasiveness of breast cancer with minimal cytotoxic effects, thus departing from the cytotoxicity-centric paradigm previously assigned to HDACi. SIGNIFICANCE: Ultraselective HDAC6 inhibitors can reduce tumor growth and invasiveness of breast cancer by noncanonical mechanisms unrelated to the previously cytotoxic properties attributed to HDAC inhibitors.
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Affiliation(s)
| | | | | | - Erica Palmer
- The George Washington University, Washington, DC
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6
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Lin A, Giuliano CJ, Palladino A, John KM, Abramowicz C, Yuan ML, Sausville EL, Lukow DA, Liu L, Chait AR, Galluzzo ZC, Tucker C, Sheltzer JM. Off-target toxicity is a common mechanism of action of cancer drugs undergoing clinical trials. Sci Transl Med 2020; 11:11/509/eaaw8412. [PMID: 31511426 DOI: 10.1126/scitranslmed.aaw8412] [Citation(s) in RCA: 355] [Impact Index Per Article: 88.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 06/19/2019] [Accepted: 08/01/2019] [Indexed: 12/14/2022]
Abstract
Ninety-seven percent of drug-indication pairs that are tested in clinical trials in oncology never advance to receive U.S. Food and Drug Administration approval. While lack of efficacy and dose-limiting toxicities are the most common causes of trial failure, the reason(s) why so many new drugs encounter these problems is not well understood. Using CRISPR-Cas9 mutagenesis, we investigated a set of cancer drugs and drug targets in various stages of clinical testing. We show that-contrary to previous reports obtained predominantly with RNA interference and small-molecule inhibitors-the proteins ostensibly targeted by these drugs are nonessential for cancer cell proliferation. Moreover, the efficacy of each drug that we tested was unaffected by the loss of its putative target, indicating that these compounds kill cells via off-target effects. By applying a genetic target-deconvolution strategy, we found that the mischaracterized anticancer agent OTS964 is actually a potent inhibitor of the cyclin-dependent kinase CDK11 and that multiple cancer types are addicted to CDK11 expression. We suggest that stringent genetic validation of the mechanism of action of cancer drugs in the preclinical setting may decrease the number of therapies tested in human patients that fail to provide any clinical benefit.
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Affiliation(s)
- Ann Lin
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.,Stony Brook University, Stony Brook, NY 11794, USA
| | - Christopher J Giuliano
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.,Stony Brook University, Stony Brook, NY 11794, USA
| | - Ann Palladino
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA
| | - Kristen M John
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.,Hofstra University, Hempstead, NY 11549, USA
| | - Connor Abramowicz
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.,New York Institute of Technology, Glen Head, NY 11545, USA
| | - Monet Lou Yuan
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.,Syosset High School, Syosset, NY 11791, USA
| | - Erin L Sausville
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA
| | - Devon A Lukow
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.,Stony Brook University, Stony Brook, NY 11794, USA
| | - Luwei Liu
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.,Stony Brook University, Stony Brook, NY 11794, USA
| | | | | | - Clara Tucker
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.,Stony Brook University, Stony Brook, NY 11794, USA
| | - Jason M Sheltzer
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.
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7
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Epigenetic Alterations in Oesophageal Cancer: Expression and Role of the Involved Enzymes. Int J Mol Sci 2020; 21:ijms21103522. [PMID: 32429269 PMCID: PMC7278932 DOI: 10.3390/ijms21103522] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/12/2020] [Accepted: 05/13/2020] [Indexed: 12/25/2022] Open
Abstract
Oesophageal cancer is a life-threatening disease, accounting for high mortality rates. The poor prognosis of this malignancy is mostly due to late diagnosis and lack of effective therapies for advanced disease. Epigenetic alterations may constitute novel and attractive therapeutic targets, owing to their ubiquity in cancer and their reversible nature. Herein, we offer an overview of the most important studies which compared differences in expression of enzymes that mediate epigenetic alterations between oesophageal cancer and normal mucosa, as well as in vitro data addressing the role of these genes/proteins in oesophageal cancer. Furthermore, The Cancer Genome Atlas database was interrogated for the correlation between expression of these epigenetic markers and standard clinicopathological features. We concluded that most epigenetic players studied thus far are overexpressed in tumours compared to normal tissue. Furthermore, functional assays suggest an oncogenic role for most of those enzymes, supporting their potential as therapeutic targets in oesophageal cancer.
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8
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Xie X, Luo K, Li Y, Ling Y, Zhang S, Xie X, Wen J. Histone deacetylase 6 expression in metastatic lymph nodes is a valuable prognostic marker for resected node-positive esophageal squamous cell cancer. Cancer Manag Res 2018; 10:5451-5460. [PMID: 30519093 PMCID: PMC6234999 DOI: 10.2147/cmar.s178575] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Background Histone deacetylase 6 (HDAC6) exerts enzymatic deacetylation activity on histones and on non-histone substrates and plays a key role in microtubule dynamics and chaperone activities. In addition, previous studies have demonstrated its role in cancer progression. However, its clinical significance in esophageal squamous cell cancer (ESCC) has not been elucidated. We investigated the correlation of HDAC6 expression and clinical outcome in a group of T3N1–3M0 surgically resected ESCCs. Methods Tissue microarrays were conducted on 209 surgically resected T3N1–3M0 ESCC tumors, including 163 pairs of primary tumors (PTs) and their corresponding metastatic lymph nodes (MLNs). Immunohistochemistry was utilized to evaluate HDAC6 protein levels. The relationship between patient outcomes and HDAC6 expression was analyzed statistically. Results The level of HDAC6 expression in ESCC MLNs was found to be significantly lower than that in PTs (P<0.001). Patients with lower MLN HDAC6 expression demonstrated improved overall survival (P=0.011) and disease-free survival (P=0.012) than those with higher HDAC6 expression. HDAC6 expression levels in PTs revealed no prognostic significance. Multivariate analysis showed that the MLN HDAC6 expression level was an independent prognostic factor for both overall survival (HR 1.456, P=0.029) and disease-free survival (HR 1.432, P=0.033). Conclusion High expression of HDAC6 in MLNs but not in PTs suggests a poor prognosis for patients with resected T3N1–3M0 ESCC. We should take into account the protein expression of MLNs when assessing prognosis in patients with lymph-node involvement.
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Affiliation(s)
- Xuan Xie
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, People's Republic of China.,Department of Thoracic Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Kongjia Luo
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China, .,Guangdong Esophageal Cancer Research Institute, Guangzhou, People's Republic of China, .,Department of Thoracic Surgery, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Yi Li
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China, .,Guangdong Esophageal Cancer Research Institute, Guangzhou, People's Republic of China, .,Department of Anesthesiology, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Yihong Ling
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China, .,Guangdong Esophageal Cancer Research Institute, Guangzhou, People's Republic of China, .,Department of Pathology, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China
| | - Shuishen Zhang
- Department of Thoracic Surgery, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Xiuying Xie
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China, .,Guangdong Esophageal Cancer Research Institute, Guangzhou, People's Republic of China,
| | - Jing Wen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, People's Republic of China, .,Guangdong Esophageal Cancer Research Institute, Guangzhou, People's Republic of China,
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9
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Zeng LS, Yang XZ, Wen YF, Mail SJ, Wang MH, Zhang MY, Zheng XFS, Wang HY. Overexpressed HDAC4 is associated with poor survival and promotes tumor progression in esophageal carcinoma. Aging (Albany NY) 2017; 8:1236-49. [PMID: 27295551 PMCID: PMC4931829 DOI: 10.18632/aging.100980] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 05/30/2016] [Indexed: 12/30/2022]
Abstract
Histone deacetylases (HDACs) mediate histone deacetylation, leading to transcriptional repression, which is involved in many diseases, including age-related tissue degeneration, heart failure and cancer. In this study, we were aimed to investigate the expression, clinical significance and biological function of HDAC4 in esophageal carcinoma (EC). We found that HDAC4 mRNA and protein are overexpressed in esophageal squamous cell carcinoma (ESCC) tissues and cell lines. HDAC4 overexpression is associated with higher tumor grade, advanced clinical stage and poor survival. Mechanistically, HDAC4 promotes proliferation and G1/S cell cycle progression in EC cells by inhibiting cyclin-dependent kinase (CDK) inhibitors p21 and p27 and up-regulating CDK2/4 and CDK-dependent Rb phosphorylation. HDAC4 also enhances ESCC cell migration. Furthermore, HDAC4 positively regulates epithelial-mesenchymal transition (EMT) by increasing the expression of Vimentin and decreasing the expression of E-Cadherin/α-Catenin. Together, our study shows that HDAC4 overexpression is important for the oncogenesis of EC, which may serve as a useful prognostic biomarker and therapeutic target for this malignancy.
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Affiliation(s)
- Li-Si Zeng
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, 510060, China.,Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University Cancer Center, Guangzhou, 510060, China.,Guangdong Esophageal Cancer Institute, Guangzhou, 510060, China
| | - Xian-Zi Yang
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, 510060, China.,Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University Cancer Center, Guangzhou, 510060, China.,Guangdong Esophageal Cancer Institute, Guangzhou, 510060, China
| | - Yue-Feng Wen
- Cancer Center of Guangzhou Medical University, Guangzhou, 510095, China
| | - Shi-Juan Mail
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, 510060, China.,Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University Cancer Center, Guangzhou, 510060, China.,Guangdong Esophageal Cancer Institute, Guangzhou, 510060, China
| | - Meng-He Wang
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, 510060, China.,Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University Cancer Center, Guangzhou, 510060, China.,Guangdong Esophageal Cancer Institute, Guangzhou, 510060, China
| | - Mei-Yin Zhang
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, 510060, China.,Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University Cancer Center, Guangzhou, 510060, China.,Guangdong Esophageal Cancer Institute, Guangzhou, 510060, China
| | - X F Steven Zheng
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, 510060, China.,Rutgers Cancer Institute of New Jersey, Rutgers University, New Brunswick, NJ 08901, USA
| | - Hui-Yun Wang
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Guangzhou, 510060, China.,Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University Cancer Center, Guangzhou, 510060, China.,Guangdong Esophageal Cancer Institute, Guangzhou, 510060, China
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10
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San Jose-Eneriz E, Agirre X, Rodríguez-Otero P, Prosper F. Epigenetic regulation of cell signaling pathways in acute lymphoblastic leukemia. Epigenomics 2016; 5:525-38. [PMID: 24059799 DOI: 10.2217/epi.13.56] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Acute lymphoblastic leukemia (ALL) is a heterogeneous cancer that is characterized by rapid and uncontrolled proliferation of immature B- or T-lymphoid precursors. Although ALL has been regarded as a genetic disease for many years, the crucial importance of epigenetic alterations in leukemogenesis has become increasingly evident. Epigenetic mechanisms, which include DNA methylation and histone modifications, are critical for gene regulation during many key biological processes. Here, we review the cell signaling pathways that are regulated by DNA methylation or histone modifications in ALL. Recent studies have highlighted the fundamental role of these modifications in ALL development, and suggested that future investigation into the specific genes and pathways that are altered by epigenetic mechanisms can contribute to the development of novel drug-based therapies for ALL.
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Affiliation(s)
- Edurne San Jose-Eneriz
- Oncology Division, Foundation for Applied Medical Research, University of Navarra, Pamplona, Spain
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11
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Cao QF, Qian SB, Wang N, Zhang L, Wang WM, Shen HB. TRPM2 mediates histone deacetylase inhibition-induced apoptosis in bladder cancer cells. Cancer Biother Radiopharm 2015; 30:87-93. [PMID: 25760728 DOI: 10.1089/cbr.2014.1697] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
PURPOSE Inhibition of histone deacetylase (HDAC) activity results in growth arrest and apoptosis in multiple types of cancer cells. It has been well established that p21 is responsible for HDAC inhibitor (HDACi)-induced growth inhibition, while the mechanism underlying HDACi-elicited apoptosis in bladder cancer cells remains largely unknown. METHODS In this study, the apoptotic response to HDACi (trichostatin A and sodium butyrate) with different concentrations was determined by flow cytometry analysis and real-time polymerase chain reaction was conducted to examine the TRPM2 (Transient receptor potential cation channel, subfamily M, member 2) expression change on HDACi treatment. TRPM2 knockdown and overexpression were performed to investigate the role of TRPM2 in HDACi-induced apoptosis. The mechanism of HDACi-elicited upregulation of TRPM2 was studied by chromatin-immunoprecipitation. RESULTS HDACi efficiently induced cell apoptosis and TRPM2 upregulation in a time- and dose-dependent manner in T24 bladder cancer cells. Functional analysis revealed that TRPM2 overexpression promotes apoptosis of T24 cells. Conversely, TRPM2 depletion remarkably antagonized HDACi-induced apoptosis. Furthermore, HDAC inhibition-elicited TRPM2 upregulation is caused by the increase of acetylated H3K9 (H3K9Ac) enrichment in TRPM2 promoter. CONCLUSIONS These data suggest that the HDACi-elicited upregulation of TRPM2 expression is required for HDACi-induced apoptosis in bladder cancer cells and that HDACi activated the enrichment of H3K9Ac-represented permissive chromatin in TRPM2 promoter.
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Affiliation(s)
- Qi-feng Cao
- Department of Urology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine , Shanghai, China
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12
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Zhao L, Wei ZB, Yang CQ, Chen JJ, Li D, Ji AF, Ma L. Effects of PLCE1 gene silencing by RNA interference on cell cycling and apoptosis in esophageal carcinoma cells. Asian Pac J Cancer Prev 2015; 15:5437-42. [PMID: 25041015 DOI: 10.7314/apjcp.2014.15.13.5437] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Esophageal squamous cell carcinoma (ESCC) is one of the most malignancies with a poor prognosis. The phospholipase C? gene (PLCE1) encodes a novel ras-related protein effector mediating the effects of R-Ras on the actin cytoskeleton and membrane protrusion. However, molecular mechanisms pertinent to ESCC are unclear. We therefore designed PLCE1-special small interfering RNA and transfected to esophageal squamous cell (EC) 9706 cells to investigate the effects of PLCE1 gene silencing on the cell cycle and apoptosis of ESCC and indicate its important role in the development of ESCC. Esophageal cancer tissue specimens and normal esophageal mucosa were obtained and assayed by immunohistochemical staining to confirm overexpression of PLCE1 in neoplasias. Fluorescence microscopy was used to examine transfection efficiency, while the result of PLCE1 silencing was examined by reverse transcription (RT-PCR). Flow cytometry and annexin V apoptosis assays were used to assess the cell cycle and apoptosis, respectively. Expression of cyclin D1 and caspase-3 was detected by Western-blotting. The level of PLCE1 protein in esophageal cancer tissue was significantly higher than that in normal tissue. After transfection, the expression of PLCE1 mRNA in EC 9706 was significantly reduced, compared with the control group. Furthermore, flow cytometry results suggested that the PLCE1 gene silencing arrested the cell cycle in the G0/G1 phase; apoptosis was significantly higher than in the negative control group and mock group. PLCE1 gene silencing by RNAi resulted in decreased expression of cyclin D1 and increased expression of caspase-3. Our study suggests that PLCE1 may be an oncogene and play an important role in esophageal carcinogenesis through regulating proteins which control cell cycling and apoptosis.
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Affiliation(s)
- Li Zhao
- Department of Endoscopy, Peace Hospital Attached to Changzhi Medical College, Changzhi, China E-mail :
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Liu YQ, Li Y, Qin J, Wang Q, She YL, Luo YL, He JX, Li JY, Xie XD. Matrine Reduces Proliferation of Human Lung Cancer Cells by Inducing Apoptosis and Changing miRNA Expression Profiles. Asian Pac J Cancer Prev 2014; 15:2169-77. [DOI: 10.7314/apjcp.2014.15.5.2169] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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