1
|
Kim Y, Jung KY, Kim YH, Xu P, Kang BE, Jo Y, Pandit N, Kwon J, Gariani K, Gariani J, Lee J, Verbeek J, Nam S, Bae SJ, Ha KT, Yi HS, Shong M, Kim KH, Kim D, Jung HJ, Lee CW, Kim KR, Schoonjans K, Auwerx J, Ryu D. Inhibition of SIRT7 overcomes sorafenib acquired resistance by suppressing ERK1/2 phosphorylation via the DDX3X-mediated NLRP3 inflammasome in hepatocellular carcinoma. Drug Resist Updat 2024; 73:101054. [PMID: 38277756 PMCID: PMC10935544 DOI: 10.1016/j.drup.2024.101054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 12/10/2023] [Accepted: 01/11/2024] [Indexed: 01/28/2024]
Abstract
AIMS Sirtuin 7 (SIRT7) plays an important role in tumor development, and has been characterized as a potent regulator of cellular stress. However, the effect of SIRT7 on sorafenib acquired resistance remains unclear and a possible anti-tumor mechanism beyond this process in HCC has not been clarified. We examined the therapeutic potential of SIRT7 and determined whether it functions synergistically with sorafenib to overcome chemoresistance. METHODS Cancer Genome Atlas-liver HCC data and unbiased gene set enrichment analyses were used to identify SIRT7 as a potential effector molecule in sorafenib acquired resistance. Two types of SIRT7 chemical inhibitors were developed to evaluate its therapeutic properties when synergized with sorafenib. Mass spectrometry was performed to discover a direct target of SIRT7, DDX3X, and DDX3X deacetylation levels and protein stability were explored. Moreover, an in vivo xenograft model was used to confirm anti-tumor effect of SIRT7 and DDX3X chemical inhibitors combined with sorafenib. RESULTS SIRT7 inhibition mediated DDX3X depletion can re-sensitize acquired sorafenib resistance by disrupting NLRP3 inflammasome assembly, finally suppressing hyperactive ERK1/2 signaling in response to NLRP3 inflammasome-mediated IL-1β inhibition. CONCLUSIONS SIRT7 is responsible for sorafenib acquired resistance, and its inhibition would be beneficial when combined with sorafenib by suppressing hyperactive pro-cell survival ERK1/2 signaling.
Collapse
Affiliation(s)
- Yuna Kim
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea.
| | - Kwan-Young Jung
- Therapeutics & Biotechnology Division, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea
| | - Yun Hak Kim
- Department of Anatomy, School of Medicine, Pusan National University, Yangsan, Republic of Korea; Department of Biomedical Informatics, School of Medicine, Pusan National University, Yangsan, Republic of Korea
| | - Pan Xu
- Laboratory of Integrative Systems Physiology, Institute of Bioengineering, Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland
| | - Baeki E Kang
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea
| | - Yunju Jo
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
| | - Navin Pandit
- Therapeutics & Biotechnology Division, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea
| | - Jeongho Kwon
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea
| | - Karim Gariani
- Service of Endocrinology, Diabetes, Nutrition and Therapeutic Patient Education, Geneva University Hospitals, Geneva, Switzerland
| | - Joanna Gariani
- Department of radiology, Hirslanden Grangettes Clinic, Geneva, Switzerland
| | - Junguee Lee
- Department of Pathology, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Daejeon, Republic of Korea
| | - Jef Verbeek
- Laboratory of Hepatology, Department of Chronic Diseases and Metabolism (CHROMETA), KU Leuven, Belgium; Department of Gastroenterology and Hepatology, University Hospitals KU Leuven, Leuven, Belgium
| | - Seungyoon Nam
- Department of Genome Medicine and Science, AI Convergence Center for Medical Science, Gachon Institute of Genome Medicine and Science, Gachon University Gil Medical Center, Gachon University College of Medicine, Incheon, Republic of Korea; Department of Health Sciences and Technology, Gachon Advanced Institute for Health Sciences and Technology (GAIHST), Republic of Korea
| | - Sung-Jin Bae
- Department of Molecular Biology and Immunology, Kosin University College of Medicine, Busan, Republic of Korea
| | - Ki-Tae Ha
- Department of Korean Medical Science, Pusan National University School of Korean Medicine, Yangsan, Republic of Korea
| | - Hyon-Seung Yi
- Laboratory of Endocrinology and Immune System, Chungnam National University School of Medicine, Daejeon, Republic of Korea
| | - Minho Shong
- Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon, Republic of Korea
| | - Kyun-Hwan Kim
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea
| | - Doyoun Kim
- Therapeutics & Biotechnology Division, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea
| | - Hee Jung Jung
- Therapeutics & Biotechnology Division, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea
| | - Chang-Woo Lee
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea
| | - Kwang Rok Kim
- Therapeutics & Biotechnology Division, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea.
| | - Kristina Schoonjans
- Laboratory of Integrative Systems Physiology, Institute of Bioengineering, Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland.
| | - Johan Auwerx
- Laboratory of Integrative Systems Physiology, Institute of Bioengineering, Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland.
| | - Dongryeol Ryu
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea; Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea.
| |
Collapse
|
2
|
Vazquez BN, Fernández-Duran I, Hernandez Y, Tarighi S, Thackray JK, Espinosa-Alcantud M, Kumari P, Ianni A, Cesaire L, Braun T, Esteller M, Tischfield J, Vaquero A, Serrano L. SIRT7 and p53 interaction in embryonic development and tumorigenesis. Front Cell Dev Biol 2024; 11:1281730. [PMID: 38234684 PMCID: PMC10791984 DOI: 10.3389/fcell.2023.1281730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 11/30/2023] [Indexed: 01/19/2024] Open
Abstract
p53 is a hallmark tumor suppressor due in part to its role in cell cycle progression, DNA damage repair, and cellular apoptosis; its protein activity interrelates with the Sirtuin family of proteins, major regulators of the cellular response to metabolic, oxidative, and genotoxic stress. In the recent years, mammalian Sirtuin 7 (SIRT7) has emerged as a pivotal regulator of p53, fine-tuning its activity in a context dependent manner. SIRT7 is frequently overexpressed in human cancer, yet its precise role in tumorigenesis and whether it involves p53 regulation is insufficiently understood. Depletion of SIRT7 in mice results in impaired embryo development and premature aging. While p53 activity has been suggested to contribute to tissue specific dysfunction in adult Sirt7 -/- mice, whether this also applies during development is currently unknown. By generating SIRT7 and p53 double-knockout mice, here we show that the demise of SIRT7-deficient embryos is not the result of p53 activity. Notably, although SIRT7 is commonly considered an oncogene, SIRT7 haploinsufficiency increases tumorigenesis in p53 knockout mice. Remarkably, in specific human tumors harboring p53 mutation, we identified that SIRT7 low expression correlates with poor patient prognosis. Transcriptomic analysis unveils a previously unrecognized interplay between SIRT7 and p53 in epithelial-to-mesenchymal transition (EMT) and extracellular matrix regulation with major implications for our understanding of embryonic development and tumor progression.
Collapse
Affiliation(s)
- Berta N. Vazquez
- Chromatin Biology Laboratory, Josep Carreras Leukaemia Research Institute (IJC), Badalona, Spain
- Unitat de Citologia i Histologia, Departament de Biologia Cel.lular, de Fisiologia i d’Immunologia, Universitat Autònoma de Barcelona (UAB), Cerdanyola del Vallès, Barcelona, Spain
| | - Irene Fernández-Duran
- Chromatin Biology Laboratory, Josep Carreras Leukaemia Research Institute (IJC), Badalona, Spain
| | - Yurdiana Hernandez
- Department of Genetics, Human Genetics Institute of New Jersey (HGINJ), Rutgers University, Piscataway, NJ, United States
| | - Shahriar Tarighi
- Department of Cardiac Development and Remodeling, Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Joshua K. Thackray
- Department of Genetics, Human Genetics Institute of New Jersey (HGINJ), Rutgers University, Piscataway, NJ, United States
| | - Maria Espinosa-Alcantud
- Chromatin Biology Laboratory, Josep Carreras Leukaemia Research Institute (IJC), Badalona, Spain
| | - Poonam Kumari
- Department of Cardiac Development and Remodeling, Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Alessandro Ianni
- Chromatin Biology Laboratory, Josep Carreras Leukaemia Research Institute (IJC), Badalona, Spain
- Department of Cardiac Development and Remodeling, Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Lionel Cesaire
- Department of Science, Borough of Manhattan Community College (BMCC), The City University of New York (CUNY), New York, NY, United States
| | - Thomas Braun
- Department of Cardiac Development and Remodeling, Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Manel Esteller
- Cancer Epigenetics Group, Josep Carreras Leukaemia Research Institute (IJC), Barcelona, Spain
- Centro de Investigacion Biomedica en Red Cancer (CIBERONC), Madrid, Spain
- Institucio Catalana de Recerca I Estudis Avançats (ICREA), Barcelona, Catalonia, Spain
- Physiological Sciences Department, School of Medicine and Health Sciences, University of Barcelona (UB), Barcelona, Catalonia, Spain
| | - Jay Tischfield
- Department of Genetics, Human Genetics Institute of New Jersey (HGINJ), Rutgers University, Piscataway, NJ, United States
| | - Alejandro Vaquero
- Chromatin Biology Laboratory, Josep Carreras Leukaemia Research Institute (IJC), Badalona, Spain
| | - Lourdes Serrano
- Department of Science, Borough of Manhattan Community College (BMCC), The City University of New York (CUNY), New York, NY, United States
| |
Collapse
|
3
|
Yu J, Yuan S, Song J, Yu S. USP39 interacts with SIRT7 to promote cervical squamous cell carcinoma by modulating autophagy and oxidative stress via FOXM1. J Transl Med 2023; 21:807. [PMID: 37957720 PMCID: PMC10641974 DOI: 10.1186/s12967-023-04623-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 10/13/2023] [Indexed: 11/15/2023] Open
Abstract
BACKGROUND Sirtuin 7 (SIRT7) is an oncogene that promotes tumor progression in various malignancies, however, its role and regulatory mechanism in cervical squamous cell carcinoma (CSCC) is unknown. Herein, we attempted to investigate the functional role and molecular mechanism of SIRT7 underlying CSCC progression. METHODS SIRT7 expression was evaluated in CSCC cells using various assays. We then used a series of function gain-and-loss experiments to determine the role of SIRT7 in CSCC progression. Furthermore, mechanism experiments were conducted to assess the interaction between SIRT7/USP39/FOXM1 in CSCC cells. Additionally, rescue assays were conducted to explore the regulatory function of USP39/FOXM1 in CSCC cellular processes. RESULTS SIRT7 was highly expressed in CSCC patient tissues and cell lines. SIRT7 deficiency showed significant repression on the proliferation, and autophagy of CSCC cells in vitro and tumorigenesis in vivo. Similarly, apoptosis and ROS production in CSCC cells were accelerated after the SIRT7 knockdown. Moreover, SIRT7 and USP39 were found colocalized in the cell nucleus. Interestingly, SIRT7 was revealed to deacetylate USP39 to promote its protein stability in CSCC cells. USP39 protein was also verified to be upregulated in CSCC tissues and cells. USP39 silencing showed suppressive effects on CSCC cell growth. Mechanistically, USP39 was revealed to upregulate SIRT7 by promoting the transcriptional activity of FOXM1. Rescue assays also indicated that SIRT7 promoted autophagy and inhibited ROS production in CSCC cells by regulating USP39/FOXM1. CONCLUSION The SIRT7/USP39/FOXM1 positive feedback network regulates autophagy and oxidative stress in CSCC, thus providing a new direction for CSCC-targeted therapy.
Collapse
Affiliation(s)
- Juanpeng Yu
- Department of Gynecology, The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, No. 1 Huanghe West Road, Huaiyin District, Huai'an, 223300, Jiangsu, China
| | - Shuai Yuan
- Department of Gynecology, The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, No. 1 Huanghe West Road, Huaiyin District, Huai'an, 223300, Jiangsu, China
| | - Jinglin Song
- Department of Obstetrics and Gynecology, Langao County Hospital of Traditional Chinese Medicine, Ankang, 725400, Shaanxi, China
| | - Shengsheng Yu
- Department of Gynecology, The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, No. 1 Huanghe West Road, Huaiyin District, Huai'an, 223300, Jiangsu, China.
| |
Collapse
|
4
|
Zhang C, Zhao J, Zhao J, Liu B, Tang W, Liu Y, Huang W, Weinman SA, Li Z. CYP2E1-dependent upregulation of SIRT7 is response to alcohol mediated metastasis in hepatocellular carcinoma. Cancer Gene Ther 2022; 29:1961-1974. [PMID: 35902730 PMCID: PMC10832389 DOI: 10.1038/s41417-022-00512-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 06/22/2022] [Accepted: 07/13/2022] [Indexed: 02/02/2023]
Abstract
Long-term alcohol use is a confirmed risk factor of liver cancer tumorigenesis and metastasis. Multiple mechanisms responsible for alcohol related tumorigenesis have been proposed, including toxic reactive metabolite production, oxidative stress and fat accumulation. However, mechanisms underlying alcohol-mediated liver cancer metastasis remain largely unknown. We have previously demonstrated that SIRT7 regulates chemosensitivity by altering a p53-dependent pathway in human HCC. In the current study, we further revealed that SIRT7 is a critical factor in promoting liver cancer metastasis. SIRT7 expression is associated with disease stage and high SIRT7 predicts worse overall and disease-free survival. Overexpression of SIRT7 promotes HCC cell migration and EMT while knockdown of SIRT7 showed opposite effects. Mechanistically, we found that SIRT7 suppresses E-Cadherin expression through FOXO3-dependent promoter binding and H3K18 deacetylation. Knockdown of FOXO3 abolished the suppressive effect of SIRT7 on E-cadherin transcription. More importantly, we identified that alcohol treatment upregulates SIRT7 and suppresses E-cadherin expression via a CYP2E/ROS axis in hepatocytes both in vitro and in vivo. Antioxidant treatment in primary hepatocyte or CYP2E1-/- mice fed with alcohol impaired those effects. Reducing SIRT7 activity completely abolished alcohol-mediated promotion of liver cancer metastasis in vivo. Taken together, our data reveal that SIRT7 is a pivotal regulator of alcohol-mediated HCC metastasis.
Collapse
Affiliation(s)
- Chen Zhang
- The Key Laboratory of Model Animals and Stem Cell Biology in Hunan Province, Hunan Normal University School of Medicine, Changsha, Hunan, China
- The Key Laboratory of Study and Discovery of Small Targeted Molecules of Hunan Province, and Hunan Normal University School of Medicine, Changsha, Hunan, China
- Department of Pharmacy, Hunan Normal University School of Medicine, Changsha, Hunan, China
| | - Jinqiu Zhao
- Department of Infectious Disease, First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jie Zhao
- Department of Internal Medicine, University of Kansas Medical Center, Kansas City, KS, USA
| | - Bohao Liu
- The Key Laboratory of Model Animals and Stem Cell Biology in Hunan Province, Hunan Normal University School of Medicine, Changsha, Hunan, China
- The Key Laboratory of Study and Discovery of Small Targeted Molecules of Hunan Province, and Hunan Normal University School of Medicine, Changsha, Hunan, China
- Department of Pharmacy, Hunan Normal University School of Medicine, Changsha, Hunan, China
| | - Wenbin Tang
- The Key Laboratory of Model Animals and Stem Cell Biology in Hunan Province, Hunan Normal University School of Medicine, Changsha, Hunan, China
- The Key Laboratory of Study and Discovery of Small Targeted Molecules of Hunan Province, and Hunan Normal University School of Medicine, Changsha, Hunan, China
- Department of Pharmacy, Hunan Normal University School of Medicine, Changsha, Hunan, China
| | - Yi Liu
- Department of General Surgery, People's Hospital of Hunan Province and Affiliated Hospital of Hunan Normal University, Changsha, Hunan, China
| | - Wenxiang Huang
- Department of Infectious Disease, First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Steven A Weinman
- Department of Internal Medicine, University of Kansas Medical Center, Kansas City, KS, USA
- Liver Center, University of Kansas Medical Center, Kansas City, KS, USA
| | - Zhuan Li
- The Key Laboratory of Model Animals and Stem Cell Biology in Hunan Province, Hunan Normal University School of Medicine, Changsha, Hunan, China.
- The Key Laboratory of Study and Discovery of Small Targeted Molecules of Hunan Province, and Hunan Normal University School of Medicine, Changsha, Hunan, China.
- Department of Pharmacy, Hunan Normal University School of Medicine, Changsha, Hunan, China.
- Department of Internal Medicine, University of Kansas Medical Center, Kansas City, KS, USA.
| |
Collapse
|
5
|
USP17L2-SIRT7 axis regulates DNA damage repair and chemoresistance in breast cancer cells. Breast Cancer Res Treat 2022; 196:31-44. [PMID: 36040642 DOI: 10.1007/s10549-022-06711-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 06/17/2022] [Indexed: 11/02/2022]
Abstract
PURPOSE Sirtuin7 (SIRT7), as a member of the sirtuin and NAD+-dependent protein-modifying enzyme family, plays an important role in regulating cellular metabolism, stress responses, tumorigenesis, and aging. Ubiquitination and deubiquitination are reversible post-translational modifications that regulate protein stability, enzyme activity, protein-protein interactions, and cellular signaling transduction. However, whether SIRT7 is regulated by deubiquitination signaling is unclear. This study aims to elucidate the molecular mechanism of SIRT7 via deubiquitination signaling. METHODS USP17L2 or SIRT7-targeting shRNAs were used to deplete USP17L2 or SIRT7. Western blot was applied to assess the effects of USP17L2 or SIRT7 depletion. A co-immunoprecipitation assay was used to detect the interaction relationship. Cell Counting Kit-8 assays were applied to assess the viability of breast cancer cells. An immunohistochemistry assay was employed to detect the protein level in samples from breast cancer patients, and the TCGA database was applied to analyze the survival rate of breast cancer patients. Statistical analyses were performed with the Student's t test (two-tailed unpaired) and χ2 test. RESULTS We find that the deubiquitinase USP17L2 interacts with and deubiquitinates SIRT7, thereby increasing SIRT7 protein stability. In addition, USP17L2 regulates DNA damage repair through SIRT7. Furthermore, SIRT7 polyubiquitination is increased by knocking down of USP17L2, which leads to cancer cells sensitizing to chemotherapy. In breast cancer patient samples, high expression of USP17L2 is correlated with increased levels of SIRT7 protein. In conclusion, our study demonstrates that the USP17L2-SIRT7 axis is the new regulator in DNA damage response and chemo-response, suggesting that USP17L2 may be a prognostic factor and a potential therapeutic target in breast cancer. CONCLUSION Our results highlighted that USP17L2 regulates the chemoresistance of breast cancer cells in a SIRT7-dependent manner. Moreover, the role of USP17L2 as a potential therapeutic target in breast cancer and a prognostic factor for patients was elucidated.
Collapse
|
6
|
Sirtuins are crucial regulators of T cell metabolism and functions. Exp Mol Med 2022; 54:207-215. [PMID: 35296782 PMCID: PMC8979958 DOI: 10.1038/s12276-022-00739-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 12/23/2021] [Indexed: 01/01/2023] Open
Abstract
It is well known that metabolism underlies T cell differentiation and functions. The pathways regulating T cell metabolism and function are interconnected, and changes in T cell metabolic activity directly impact the effector functions and fate of T cells. Thus, understanding how metabolic pathways influence immune responses and ultimately affect disease progression is paramount. Epigenetic and posttranslational modification mechanisms have been found to control immune responses and metabolic reprogramming. Sirtuins are NAD+-dependent histone deacetylases that play key roles during cellular responses to a variety of stresses and have recently been reported to have potential roles in immune responses. Therefore, sirtuins are of significant interest as therapeutic targets to treat immune-related diseases and enhance antitumor immunity. This review aims to illustrate the potential roles of sirtuins in different subtypes of T cells during the adaptive immune response. Sirtuins, enzymes that regulate how cells respond to stress, regulate T cell metabolism and functions, and therefore blocking or boosting sirtuins influences immune responses. As part of the immune system, some types of T cells attack specific targets; others keep the immune response in check. Imene Hamaidi and Sungjune Kim at H. Lee Moffitt Cancer Center, Tampa, USA, have reviewed how sirtuins affect different subsets of T cells to either promote or suppress immune responses. Boosting sirtuins that increase the function of inflammation-suppressing T cells can improve outcomes for transplant recipients or help treat autoimmune diseases. Conversely, stimulating immune-activating sirtuins can help re-energize exhausted antitumor T cells. Understanding the complex web of sirtuin–T cell interactions may help in developing therapeutic strategies for improving transplant outcomes, and for treating autoimmune diseases and cancer.
Collapse
|
7
|
Bioinformatic Analysis of the Effect of the Sirtuin Family on Differentiated Thyroid Carcinoma. BIOMED RESEARCH INTERNATIONAL 2022; 2022:5794118. [PMID: 35136826 PMCID: PMC8818415 DOI: 10.1155/2022/5794118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 12/10/2021] [Indexed: 12/12/2022]
Abstract
A growing body of experimental evidence suggests that sirtuins (SIRTs) are associated with tumorigenesis in differentiated thyroid cancer (DTC). Nevertheless, the involvement of SIRTs in the pathogenesis of DTC and their clinical value remain ill-defined and should be thoroughly examined. We explored the transcription of SIRTs and survival data of patients with DTC by the systematic utilization of bioinformatics to analyze data of publicly accessible databases including Oncomine, cBioPortal, Kaplan-Meier Plotter, Gene Expression Profiling Interactive Analysis (GEPIA), Protein Atlas, LinkedOmics, and GSCALite. The examination of gene expression profiles showed that SIRT2, SIRT3, SIRT4, SIRT5, and SIRT6 were downregulated in DTC tissues compared with the normal thyroid tissues. The decreased expression levels of SIRT2, SIRT4, and SIRT5 were correlated with advanced tumor stages. The survival results showed that the increased SIRT4 mRNA expression level was associated with improved overall survival (OS) in the DTC patients. In addition, patients with DTC with high SIRT2, SIRT3, SIRT4, and SIRT5 mRNA levels had higher disease-free survival (DFS). These results showed that SIRT2, SIRT3, SIRT4, SIRT5, and SIRT6 are potential targets for precise treatment of DTC patients and that SIRT2, SIRT3, SIRT4, and SIRT5 are novel potential biomarkers for the prognosis of DTC.
Collapse
|
8
|
Raghu S, Prabhashankar AB, Shivanaiah B, Tripathi E, Sundaresan NR. Sirtuin 6 Is a Critical Epigenetic Regulator of Cancer. Subcell Biochem 2022; 100:337-360. [PMID: 36301499 DOI: 10.1007/978-3-031-07634-3_10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Sirtuin 6 (SIRT6) is a member of the mammalian sirtuin family with deacetylase, deacylase, and mono-ADP-ribosyl-transferase activities. It is a multitasking chromatin-associated protein regulating different cellular and physiological functions in cells. Specifically, SIRT6 dysfunction is implicated in several aging-related human diseases, including cancer. Studies indicate that SIRT6 has a tumor-specific role, and it is considered a tumor suppressor as well as a tumor growth inducer, depending on the type of cancer. In this chapter, we review the role of SIRT6 in metabolism, genomic stability, and cancer. Further, we provide an insight into the interplay of the tumor-suppressing and oncogenic roles of SIRT6 in cancer. Additionally, we discuss the use of small-molecule SIRT6 modulators as potential therapeutics.
Collapse
Affiliation(s)
- Sukanya Raghu
- Department of Microbiology and Cell Biology, Division of Biological Sciences, Indian Institute of Science (IISc), Bengaluru, Karnataka, India
| | - Arathi Bangalore Prabhashankar
- Department of Microbiology and Cell Biology, Division of Biological Sciences, Indian Institute of Science (IISc), Bengaluru, Karnataka, India
| | - Bhoomika Shivanaiah
- Department of Microbiology and Cell Biology, Division of Biological Sciences, Indian Institute of Science (IISc), Bengaluru, Karnataka, India
| | - Ekta Tripathi
- Department of Biotechnology, Faculty of Life and Allied Health Sciences, Ramaiah University of Applied Sciences, Bengaluru, India.
- Department of Microbiology and Cell Biology, Division of Biological Sciences, Indian Institute of Science (IISc), Bengaluru, Karnataka, India.
| | - Nagalingam Ravi Sundaresan
- Department of Microbiology and Cell Biology, Division of Biological Sciences, Indian Institute of Science (IISc), Bengaluru, Karnataka, India.
| |
Collapse
|
9
|
Wu F, Xu L, Tu Y, Cheung OK, Szeto LL, Mok MT, Yang W, Kang W, Cao Q, Lai PB, Chan SL, Tan P, Sung JJ, Yip KY, Cheng AS, To KF. Sirtuin 7 super-enhancer drives epigenomic reprogramming in hepatocarcinogenesis. Cancer Lett 2021; 525:115-130. [PMID: 34736960 DOI: 10.1016/j.canlet.2021.10.039] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 10/14/2021] [Accepted: 10/26/2021] [Indexed: 12/13/2022]
Abstract
Hepatocellular carcinoma (HCC) is a major cancer burden worldwide with increasing incidence in many developed countries. Super-enhancers (SEs) drive gene expressions required for cell type-specificity and tumor cell identity. However, their roles in HCC remain unclear because of data scarcity from primary tumors. Herein, chromatin profiling of non-alcoholic fatty liver disease (NAFLD)-associated HCCs and matched liver tissues uncovered an average of ∼500 somatically-acquired SEs per patient. The identified SE-target genes were functionally enriched for aberrant metabolism and cancer phenotypes, especially chromatin regulators including deacetylases and Polycomb repressive complexes. Notably, all examined tumors exhibited SE activation of Sirtuin 7 (SIRT7), genome-wide promoter H3K18 deacetylation and concurrent H3K27me3, as well as tumor-suppressor gene silencing. Depletion of SIRT7 SE in hepatoma cells induced global H3K18 acetylation and reactivated key metabolic and immune regulators, leading to marked suppression of tumorigenicity in vitro and in vivo. In concordance, SIRT7 physically interacted with the methyltransferase EZH2, and they were co-expressed in primary HCCs. In summary, our integrative analysis establishes a compendium of SEs in NAFLD-associated HCCs and uncovers SIRT7-driven chromatin regulatory network as potential druggable vulnerability of this increasingly prevalent cancer.
Collapse
Affiliation(s)
- Feng Wu
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Liangliang Xu
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yalin Tu
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Otto Kw Cheung
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Lemuel Lm Szeto
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Myth Ts Mok
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Weiqin Yang
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Wei Kang
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Qin Cao
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Paul Bs Lai
- Department of Surgery, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Stephen L Chan
- Department of Clinical Oncology, The Chinese University of Hong Kong, Hong Kong SAR, China; State Key Laboratory of Translational Oncology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Patrick Tan
- Program in Cancer and Stem Cell Biology, Duke-NUS Medical School, Singapore
| | - Joseph Jy Sung
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore; Institute of Precision Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Kevin Y Yip
- Department of Computer Science and Engineering, The Chinese University of Hong Kong, Hong Kong SAR, China.
| | - Alfred Sl Cheng
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China.
| | - Ka F To
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong SAR, China; State Key Laboratory of Translational Oncology, The Chinese University of Hong Kong, Hong Kong SAR, China.
| |
Collapse
|
10
|
Zhou X, Monnie C, DeLucia M, Ahn J. HIV-1 Vpr activates host CRL4-DCAF1 E3 ligase to degrade histone deacetylase SIRT7. Virol J 2021; 18:48. [PMID: 33648539 PMCID: PMC7923639 DOI: 10.1186/s12985-021-01514-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 02/12/2021] [Indexed: 12/05/2022] Open
Abstract
Background Vpr is a virion-associated protein that is encoded by lentiviruses and serves to counteract intrinsic immunity factors that restrict infection. HIV-1 Vpr mediates proteasome-dependent degradation of several DNA repair/modification proteins. Mechanistically, Vpr directly recruits cellular targets onto DCAF1, a substrate receptor of Cullin 4 RING E3 ubiquitin ligase (CRL4) for poly-ubiquitination. Further, Vpr can mediate poly-ubiquitination of DCAF1-interacting proteins by the CRL4. Because Vpr-mediated degradation of its known targets can not explain the primary cell-cycle arrest phenotype that Vpr expression induces, we surveyed the literature for DNA-repair-associated proteins that interact with the CRL4-DCAF1. One such protein is SIRT7, a deacetylase of histone 3 that belongs to the Sirtuin family and regulates a wide range of cellular processes. We wondered whether Vpr can mediate degradation of SIRT7 via the CRL4-DCAF1. Methods HEK293T cells were transfected with cocktails of plasmids expressing DCAF1, DDB1, SIRT7 and Vpr. Ectopic and endogeneous levels of SIRT7 were monitered by immunoblotting and protein–protein interactions were assessed by immunoprecipitation. For in vitro reconstitution assays, recombinant CRL4-DCAF1-Vpr complexes and SIRT7 were prepared and poly-ubiqutination of SIRT7 was monitored with immunoblotting. Results We demonstrate SIRT7 polyubiquitination and degradation upon Vpr expression. Specifically, SIRT7 is shown to interact with the CRL4-DCAF1 complex, and expression of Vpr in HEK293T cells results in SIRT7 degradation, which is partially rescued by CRL inhibitor MNL4924 and proteasome inhibitor MG132. Further, in vitro reconstitution assays show that Vpr induces poly-ubiquitination of SIRT7 by the CRL4-DCAF1. Importantly, we find that Vpr from several different HIV-1 strains, but not HIV-2 strains, mediates SIRT7 poly-ubiquitination in the reconstitution assay and degradation in cells. Finally, we show that SIRT7 degradation by Vpr is independent of the known, distinctive phenotype of Vpr-induced cell cycle arrest at the G2 phase, Conclusions Targeting histone deacetylase SIRT7 for degradation is a conserved feature of HIV-1 Vpr. Altogether, our findings reveal that HIV-1 Vpr mediates down-regulation of SIRT7 by a mechanism that does not involve novel target recruitment to the CRL4-DCAF1 but instead involves regulation of the E3 ligase activity.
Collapse
Affiliation(s)
- Xiaohong Zhou
- Department of Structural Biology and Pittsburgh Center for HIV Protein Interactions, University of Pittsburgh School of Medicine, Biomedical Science Tower 3, RM 1055, 3501 Fifth Ave., Pittsburgh, PA, 15260, USA
| | - Christina Monnie
- Department of Structural Biology and Pittsburgh Center for HIV Protein Interactions, University of Pittsburgh School of Medicine, Biomedical Science Tower 3, RM 1055, 3501 Fifth Ave., Pittsburgh, PA, 15260, USA
| | - Maria DeLucia
- Department of Structural Biology and Pittsburgh Center for HIV Protein Interactions, University of Pittsburgh School of Medicine, Biomedical Science Tower 3, RM 1055, 3501 Fifth Ave., Pittsburgh, PA, 15260, USA
| | - Jinwoo Ahn
- Department of Structural Biology and Pittsburgh Center for HIV Protein Interactions, University of Pittsburgh School of Medicine, Biomedical Science Tower 3, RM 1055, 3501 Fifth Ave., Pittsburgh, PA, 15260, USA.
| |
Collapse
|
11
|
Zhao Y, Ye X, Chen R, Gao Q, Zhao D, Ling C, Qian Y, Xu C, Tao M, Xie Y. Sirtuin 7 promotes non‑small cell lung cancer progression by facilitating G1/S phase and epithelial‑mesenchymal transition and activating AKT and ERK1/2 signaling. Oncol Rep 2020; 44:959-972. [PMID: 32705247 PMCID: PMC7388485 DOI: 10.3892/or.2020.7672] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 05/29/2020] [Indexed: 12/11/2022] Open
Abstract
Increasing evidence has indicated the roles of sirtuin 7 (SIRT7) in numerous human cancers. However, the effects and the clinical significance of SIRT7 in human lung cancer is largely unknown. The present research demonstrated that SIRT7 was increased in human lung cancer tumor tissues. SIRT7 upregulation was associated with clinicopathological characteristics of lung cancer malignancy including positive lymph node metastasis, high pathologic stage and large tumor size. SIRT7 was also upregulated in human non-small cell lung cancer (NSCLC) cell lines. Furthermore SIRT7-overexpressed A549 (A549-SIRT7) and SIRT7-knocked down H292 (H292-shSIRT7) human NSCLC cell lines were established. Using these NSCLC cells and xenograft mouse models, it was revealed that SIRT7 overexpression markedly promoted growth and G1 to S cell cycle phase transition as well as migration, invasion and distant lung metastasis in A549 NSCLC cells, whereas SIRT7 knockdown suppressed these processes in H292 NSCLC cells. Mechanistically, in A549 NSCLC cells, SIRT7 overexpression significantly activated not only protein kinase B (AKT) signaling but also extracellular signal-regulated kinase 1/2 (ERK1/2) signaling. SIRT7 overexpression also significantly downregulated cyclin-dependent kinase (CDK) inhibitors including p21 and p27 as well as upregulated cyclins including cyclin D1 and cyclin E1, and CDKs including CDK2 and CDK4. Notably, the epithelial-mesenchymal transition (EMT) process of A549 NSCLC cells was facilitated by SIRT7 overexpression, as evidenced by E-cadherin epithelial marker downregulation and mesenchymal markers (N-cadherin, vimentin, Snail and Slug) upregulation. In addition, SIRT7 knockdown in H292 NSCLC cells exhibited the opposite regulatory effects. Moreover, inhibition of AKT signaling abated the promoting effects of SIRT7 in NSCLC cell proliferation and EMT progression. The present data indicated that SIRT7 accelerated human NSCLC cell growth and metastasis possibly by promotion of G1 to S-phase transition and EMT through modulation of the expression of G1-phase checkpoint molecules and EMT markers as well as activation of AKT and ERK1/2 signaling. SIRT7 could be an innovative potential target for human NSCLC therapy.
Collapse
Affiliation(s)
- Yingying Zhao
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Xia Ye
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Ruifang Chen
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Qian Gao
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Daguo Zhao
- Department of Respiratory Medicine, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Chunhua Ling
- Department of Respiratory Medicine, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Yulan Qian
- Department of Pharmacy, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Chun Xu
- Department of Cardio‑Thoracic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Min Tao
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| | - Yufeng Xie
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
| |
Collapse
|
12
|
Sirtuins' Deregulation in Bladder Cancer: SIRT7 Is Implicated in Tumor Progression through Epithelial to Mesenchymal Transition Promotion. Cancers (Basel) 2020; 12:cancers12051066. [PMID: 32344886 PMCID: PMC7281198 DOI: 10.3390/cancers12051066] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/21/2020] [Accepted: 04/23/2020] [Indexed: 12/20/2022] Open
Abstract
Sirtuins are emerging players in cancer biology and other age-related disorders, and their putative role in bladder cancer (BlCa) remains elusive. Further understanding of disease biology may allow for generation of more effective pathway-based biomarkers and targeted therapies. Herein, we aimed to illuminate the role of sirtuins’ family in BlCa and evaluate their potential as disease biomarkers and therapeutic targets. SIRT1-7 transcripts and protein levels were evaluated in a series of primary BlCa and normal bladder mucosa tissues. SIRT7 knockdown was performed through lentiviral transduction in MGHU3, 5637 and J82 cells and its functional role was assessed. SIRT1, 2, 4 and 5 expression levels were significantly lower in BlCa, whereas SIRT6 and 7 were overexpressed, and these results were corroborated by TCGA cohort analysis. SIRT7 transcript levels were significantly decreased in muscle-invasive vs. papillary BlCa. In vitro studies showed that SIRT7 downregulation promoted cells migration and invasion. Accordingly, increased EMT markers expression and decreased E-Cadherin (CDH1) was observed in those BlCa cells. Moreover, increased EZH2 expression and H3K27me3 deposition in E-Cadherin promoter was found in sh-SIRT7 cells. We demonstrated that sirtuins are globally deregulated in BlCa, and specifically SIRT7 downregulation is implicated in EMT, fostering BlCa invasiveness through EZH2-CDH1 axis.
Collapse
|
13
|
Tan Y, Li B, Peng F, Gong G, Li N. Integrative Analysis of Sirtuins and Their Prognostic Significance in Clear Cell Renal Cell Carcinoma. Front Oncol 2020; 10:218. [PMID: 32158696 PMCID: PMC7052292 DOI: 10.3389/fonc.2020.00218] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Accepted: 02/07/2020] [Indexed: 11/26/2022] Open
Abstract
Sirtuins, class III histone deacetylases, are involved in multiple biological processes in cancer initiation and progression. However, the diverse expression patterns and prognostic values of sirtuins in cancers have yet to be elucidated. In this study, we first evaluated the expression and prognostic values of sirtuins in multiple cancer cohorts using publicly available TCGA pan-cancer datasets. Pan-cancer survival analysis indicated that 6 out of 7 sirtuin family members were significant associated with prognosis of clear cell renal cell carcinoma (KIRC) patients. SIRT1, SIRT3, SIRT4, and SIRT5 were associated with favorable prognosis of KIRC patients, while SIRT6 and SIRT7 were associated with unfavorable prognosis. The expression levels of SIRT4 and SIRT5 in KIRC tissues were lower than that in normal tissues, while SIRT6 and SIRT7 were higher in KIRC tissues. The expression levels of SIRT1, SIRT3, SIRT5, SIRT6, and SIRT7 were significantly correlated with tumor stage and histological grade. DNA methylation may contribute to the dysregulation of sirtuins. Finally, GSEA was conducted to predict the potential functions of sirtuins in KIRC. Our results may provide novel insights for the development of sirtuins-based cancer therapy in KIRC.
Collapse
Affiliation(s)
- Ying Tan
- Department of Blood Transfusion, Xiangya Hospital, Central South University, Changsha, China
| | - Bijuan Li
- Department of Blood Transfusion, Xiangya Hospital, Central South University, Changsha, China
| | - Fang Peng
- NHC Key Laboratory of Cancer Proteomics, Xiangya Hospital, Central South University, Changsha, China
| | - Guanghui Gong
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, China
| | - Ning Li
- Department of Blood Transfusion, Xiangya Hospital, Central South University, Changsha, China
| |
Collapse
|
14
|
Elmallah MIY, Micheau O. Epigenetic Regulation of TRAIL Signaling: Implication for Cancer Therapy. Cancers (Basel) 2019; 11:cancers11060850. [PMID: 31248188 PMCID: PMC6627638 DOI: 10.3390/cancers11060850] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 06/11/2019] [Accepted: 06/18/2019] [Indexed: 12/20/2022] Open
Abstract
One of the main characteristics of carcinogenesis relies on genetic alterations in DNA and epigenetic changes in histone and non-histone proteins. At the chromatin level, gene expression is tightly controlled by DNA methyl transferases, histone acetyltransferases (HATs), histone deacetylases (HDACs), and acetyl-binding proteins. In particular, the expression level and function of several tumor suppressor genes, or oncogenes such as c-Myc, p53 or TRAIL, have been found to be regulated by acetylation. For example, HATs are a group of enzymes, which are responsible for the acetylation of histone proteins, resulting in chromatin relaxation and transcriptional activation, whereas HDACs by deacetylating histones lead to chromatin compaction and the subsequent transcriptional repression of tumor suppressor genes. Direct acetylation of suppressor genes or oncogenes can affect their stability or function. Histone deacetylase inhibitors (HDACi) have thus been developed as a promising therapeutic target in oncology. While these inhibitors display anticancer properties in preclinical models, and despite the fact that some of them have been approved by the FDA, HDACi still have limited therapeutic efficacy in clinical terms. Nonetheless, combined with a wide range of structurally and functionally diverse chemical compounds or immune therapies, HDACi have been reported to work in synergy to induce tumor regression. In this review, the role of HDACs in cancer etiology and recent advances in the development of HDACi will be presented and put into perspective as potential drugs synergizing with TRAIL's pro-apoptotic potential.
Collapse
Affiliation(s)
- Mohammed I Y Elmallah
- INSERM, Université Bourgogne Franche-Comté, LNC UMR1231, F-21079 Dijon, France.
- Chemistry Department, Faculty of Science, Helwan University, Ain Helwan 11795 Cairo, Egypt.
| | - Olivier Micheau
- INSERM, Université Bourgogne Franche-Comté, LNC UMR1231, F-21079 Dijon, France.
| |
Collapse
|
15
|
Zhao J, Wozniak A, Adams A, Cox J, Vittal A, Voss J, Bridges B, Weinman SA, Li Z. SIRT7 regulates hepatocellular carcinoma response to therapy by altering the p53-dependent cell death pathway. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2019; 38:252. [PMID: 31196136 PMCID: PMC6567523 DOI: 10.1186/s13046-019-1246-4] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 05/27/2019] [Indexed: 02/07/2023]
Abstract
Background Optimal therapeutic strategies for hepatocellular carcinoma (HCC) patients are still challenging due to the high recurrence rate after surgical resection and chemotherapy resistance. Growing evidence shows that genetic and epigenetic alterations are involved in HCC progression and resistance to therapy, however the molecular mechanisms underlying resistance to therapy have not been fully understood. Methods Expression of SIRT7 in 17 paired paraffin-embedded HCC tissues and adjacent nontumoral liver tissues was examined by immunohistochemistry and Western blot. The mRNA expression of SIRT7 in 20 paired frozen HCC tissues and adjacent nontumoral liver tissues was analyzed by quantitative RT-PCR. The biologic consequences of overexpression and knockdown of SIRT7 in HCC therapy sensitivity were studied in vitro and in vivo. Interaction between SIRT7 and p53 were studied in HCC cell lines. Results SIRT7 expression was frequently upregulated in clinical HCC samples, and its expression was highly associated with TACE-resistance and poor survival (P = 0.008.) Depletion of SIRT7 from multiple liver cancer cell lines significantly increased doxorubicin toxicity while overexpression of SIRT7 largely abolished doxorubicin induced apoptosis. At the molecular level, we observed that SIRT7 interacts with and induces deacetylation of p53 at lysines 320 and 373. Deacetylated p53 showed significantly less affinity for the NOXA promoter and its transcription. In mouse xenografts, SIRT7 suppression increased doxorubicin induced p53 activation, inhibited tumor growth and induced apoptosis. Conclusion The newly identified SIRT7-p53-NOXA axis partially illustrates the molecular mechanism of HCC resistance to therapy and represents a novel potential therapeutic target for HCC treatment. Electronic supplementary material The online version of this article (10.1186/s13046-019-1246-4) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Jie Zhao
- Department of Internal Medicine, University of Kansas Medical Center, Mailstop 1018, Kansas City, KS, 66160, USA
| | - Ann Wozniak
- Department of Internal Medicine, University of Kansas Medical Center, Mailstop 1018, Kansas City, KS, 66160, USA
| | - Abby Adams
- Department of Internal Medicine, University of Kansas Medical Center, Mailstop 1018, Kansas City, KS, 66160, USA
| | - Josiah Cox
- Department of Internal Medicine, University of Kansas Medical Center, Mailstop 1018, Kansas City, KS, 66160, USA
| | - Anusha Vittal
- Department of Internal Medicine, University of Kansas Medical Center, Mailstop 1018, Kansas City, KS, 66160, USA
| | - Jordan Voss
- Department of Internal Medicine, University of Kansas Medical Center, Mailstop 1018, Kansas City, KS, 66160, USA
| | - Brian Bridges
- Liver Center, University of Kansas Medical Center, Kansas City, KS, 66160, USA
| | - Steven A Weinman
- Department of Internal Medicine, University of Kansas Medical Center, Mailstop 1018, Kansas City, KS, 66160, USA. .,Liver Center, University of Kansas Medical Center, Kansas City, KS, 66160, USA.
| | - Zhuan Li
- Department of Internal Medicine, University of Kansas Medical Center, Mailstop 1018, Kansas City, KS, 66160, USA.
| |
Collapse
|
16
|
H3K18Ac as a Marker of Cancer Progression and Potential Target of Anti-Cancer Therapy. Cells 2019; 8:cells8050485. [PMID: 31121824 PMCID: PMC6562857 DOI: 10.3390/cells8050485] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 05/13/2019] [Accepted: 05/16/2019] [Indexed: 02/07/2023] Open
Abstract
Acetylation and deacetylation are posttranslational modifications (PTMs) which affect the regulation of chromatin structure and its remodeling. Acetylation of histone 3 at lysine placed on position 18 (H3K18Ac) plays an important role in driving progression of many types of cancer, including breast, colon, lung, hepatocellular, pancreatic, prostate, and thyroid cancer. The aim of this review is to analyze and discuss the newest findings regarding the role of H3K18Ac and acetylation of other histones in carcinogenesis. We summarize the level of H3K18Ac in different cancer cell lines and analyze its association with patients’ outcomes, including overall survival (OS), progression-free survival (PFS), and disease-free survival (DFS). Finally, we describe future perspectives of cancer therapeutic strategies based on H3K18 modifications.
Collapse
|
17
|
Ghirotto B, Terra FF, Câmara NOS, Basso PJ. Sirtuins in B lymphocytes metabolism and function. World J Exp Med 2019; 9:1-13. [PMID: 30705866 PMCID: PMC6354076 DOI: 10.5493/wjem.v9.i1.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 10/29/2018] [Accepted: 01/05/2019] [Indexed: 02/06/2023] Open
Abstract
Sirtuins (SIRTs) are NAD+-dependent histone deacetylases and play a role in virtually all cell biological processes. As SIRTs functions vary according to their subtypes, they can either activate or inhibit signaling pathways upon different conditions or tissues. Recent studies have focused on metabolic effects performed by SIRTs in several cell types since specific metabolic pathways (e.g., aerobic glycolysis, oxidative phosphorylation, β-oxidation, glutaminolysis) are used to determine the cell fate. However, few efforts have been made to understand the role of SIRTs on B lymphocytes metabolism and function. These cells are associated with humoral immune responses by secreting larger amounts of antibodies after differentiating into antibody-secreting cells. Besides, both the SIRTs and B lymphocytes are potential targets to treat several immune-mediated disorders, including cancer. Here, we provide an outlook of recent studies regarding the role of SIRTs in general cellular metabolism and B lymphocytes functions, pointing out the future perspectives of this field.
Collapse
Affiliation(s)
- Bruno Ghirotto
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000, Brazil
| | - Fernanda Fernandes Terra
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000, Brazil
| | - Niels Olsen Saraiva Câmara
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000, Brazil
- Division of Nephrology, School of Medicine, Federal University of São Paulo, São Paulo 04023-062, Brazil
- Laboratory of Renal Physiology (LIM 16), School of Medicine, University of São Paulo, São Paulo 01246-903, Brazil
| | - Paulo José Basso
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000, Brazil
| |
Collapse
|
18
|
Hsu YC, Wu YT, Tsai CL, Wei YH. Current understanding and future perspectives of the roles of sirtuins in the reprogramming and differentiation of pluripotent stem cells. Exp Biol Med (Maywood) 2019; 243:563-575. [PMID: 29557214 DOI: 10.1177/1535370218759636] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
In mammalian cells, there are seven members of the sirtuin protein family (SIRT1-7). SIRT1, SIRT6, and SIRT7 catalyze posttranslational modification of proteins in the nucleus, SIRT3, SIRT4, and SIRT5 are in the mitochondria and SIRT2 is in the cytosol. SIRT1 can deacetylate the transcription factor SOX2 and regulate induced pluripotent stem cells (iPSCs) reprogramming through the miR-34a-SIRT1-p53 axis. SIRT2 can regulate the function of pluripotent stem cells through GSK3β. SIRT3 can positively regulate PPAR gamma coactivator 1-alpha (PGC-1α) expression during the differentiation of stem cells. SIRT4 has no direct role in regulating reprogramming but may have the potential to prevent senescence of somatic cells and to facilitate the reprogramming of iPSCs. SIRT5 can deacetylate STAT3, which is an important transcription factor in regulating pluripotency and differentiation of stem cells. SIRT6 can enhance the reprogramming efficiency of iPSCs from aged skin fibroblasts through miR-766 and increase the expression levels of the reprogramming genes including Sox2, Oct4, and Nanog through acetylation of histone H3 lysine 56. SIRT7 plays a regulatory role in the process of mesenchymal-to-epithelial transition (MET), which has been suggested to be a crucial process in the generation of iPSCs from fibroblasts. In this review, we summarize recent findings of the roles of sirtuins in the metabolic reprogramming and differentiation of stem cells and discuss the bidirectional changes in the gene expression and activities of sirtuins in the commitment of differentiation of mesenchymal stem cells (MSCs) and reprogramming of somatic cells to iPSCs, respectively. Thus, understanding the molecular basis of the interplay between different sirtuins and mitochondrial function will provide new insights into the regulation of differentiation of stem cells and iPSCs formation, respectively, and may help design effective stem cell therapies for regenerative medicine. Impact statement This is an extensive review of the recent advances in our understanding of the roles of some members of the sirtuins family, such as SIRT1, SIRT2, SIRT3, and SIRT6, in the regulation of intermediary metabolism during stem cell differentiation and in the reprogramming of somatic cells to form induced pluripotent stem cells (iPSCs). This article provides an updated integrated view on the mechanisms by which sirtuins-mediated posttranslational protein modifications regulate mitochondrial biogenesis, bioenergetics, and antioxidant defense in the maintenance and differentiation of stem cells and in iPSCs formation, respectively.
Collapse
Affiliation(s)
- Yi-Chao Hsu
- 1 Institute of Biomedical Sciences, 145474 Mackay Medical College , New Taipei City 252, Taiwan.,*These two authors made equal contributions
| | - Yu-Ting Wu
- 2 Center for Mitochondrial Medicine and Free Radical Research, Changhua Christian Hospital, Changhua City 500, Taiwan.,*These two authors made equal contributions
| | - Chia-Ling Tsai
- 1 Institute of Biomedical Sciences, 145474 Mackay Medical College , New Taipei City 252, Taiwan
| | - Yau-Huei Wei
- 1 Institute of Biomedical Sciences, 145474 Mackay Medical College , New Taipei City 252, Taiwan.,2 Center for Mitochondrial Medicine and Free Radical Research, Changhua Christian Hospital, Changhua City 500, Taiwan
| |
Collapse
|
19
|
Kim JH, Kim D, Cho SJ, Jung KY, Kim JH, Lee JM, Jung HJ, Kim KR. Identification of a novel SIRT7 inhibitor as anticancer drug candidate. Biochem Biophys Res Commun 2018; 508:451-457. [PMID: 30503501 DOI: 10.1016/j.bbrc.2018.11.120] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 11/20/2018] [Indexed: 12/24/2022]
Abstract
Sirtuins (SIRT1-7), a class of deacetylases, play major roles in DNA damage repair, aging, and metabolism in yeast and in mammals. SIRT7 is localized in the nucleolus. It regulates cellular processes, including genomic stability, rDNA transcription, and cell proliferation, and plays a role in tumorigenesis. SIRT7 deacetylates its substrates histone H3 (at lysine 18) and p53. p53, a tumor suppressor, induces apoptosis or cell cycle arrest and is stabilized by acetylation. p53 deacetylation at K382 by SIRT7 suppressed cancer cell growth by attenuating p53 activity. Therefore, identification of novel SIRT7 enzyme inhibitors is important. In this study, we found a novel inhibitor of SIRT7 (ID: 97491) that decreased SIRT7 activity in a dose-dependent manner. ID: 97491 induced expression of p53 and its acetylation by inhibited SIRT7. Moreover, ID: 97491 upregulated apoptotic effects through the caspase related proteins and inhibited cancer growth in vivo. The study results suggest that ID: 97491 can be a potential candidate to inhibit the deacetylase activity of SIRT7 and prevent tumor progression by increasing p53 stability through acetylation at K373/382.
Collapse
Affiliation(s)
- Ji-Hye Kim
- Division of Innovative Target Research Center, Korea Research Institute of Chemical Technology, Daejeon, 34114, South Korea; Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, South Korea
| | - Dahee Kim
- Division of Bio Platform Technology Research Center, Korea Research Institute of Chemical Technology, Daejeon, 34114, South Korea; Graduate School of New Drug Discovery and Development, Chungnam National University, Daejeon, 350-764, South Korea
| | - Suk Joon Cho
- Division of Innovative Target Research Center, Korea Research Institute of Chemical Technology, Daejeon, 34114, South Korea; College of Pharmacy, Chungbuk National University, Cheongju, 28160, South Korea
| | - Kwan-Young Jung
- Division of Innovative Target Research Center, Korea Research Institute of Chemical Technology, Daejeon, 34114, South Korea; Department of Medicinal Chemistry and Pharmacology, University of Science & Technology, Daejeon, 34113, South Korea
| | - Jong-Hoon Kim
- Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, South Korea
| | - Jun Mi Lee
- Division of Innovative Target Research Center, Korea Research Institute of Chemical Technology, Daejeon, 34114, South Korea
| | - Hee Jung Jung
- Division of Innovative Target Research Center, Korea Research Institute of Chemical Technology, Daejeon, 34114, South Korea
| | - Kwang Rok Kim
- Division of Innovative Target Research Center, Korea Research Institute of Chemical Technology, Daejeon, 34114, South Korea.
| |
Collapse
|
20
|
Mao S, Ma J, Yu H. Sirtuin-7 knockdown inhibits the growth of endometrial cancer cells by inducing apoptosis via the NF-κB signaling pathway. Oncol Lett 2018; 17:937-943. [PMID: 30655851 PMCID: PMC6312928 DOI: 10.3892/ol.2018.9698] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 01/22/2018] [Indexed: 12/21/2022] Open
Abstract
Sirtuin-7 is an evolutionarily conserved NAD-dependent deacetylase, which serves an important role in carcinogenesis. However, the potential mechanism of sirtuin-7 in endometrial cancer has not yet been investigated. The purpose of the present study was to investigate whether sirtuin-7 exhibits inhibitory effects on endometrial cancer cells. The potential mechanisms mediated by sirtuin-7 in endometrial cancer cells were also investigated. The expression levels of sirtuin-7 in endometrial cancer cells were compared with normal endometrial cells using western blotting. The results demonstrated that sirtuin-7 is overexpressed in endometrial cancer cells compared with normal endometrial cells. The downregulation of sirtuin-7 inhibited the growth and invasiveness of endometrial cancer cells. The knockdown of sirtuin-7 was observed to increase the sensitivity of the endometrial cancer cells to cisplatin treatment in vitro. An investigation into the potential molecular mechanism demonstrated that sirtuin-7 knockdown promoted the apoptosis of endometrial cancer cells by regulating the nuclear factor (NF)-κB signaling pathway. The knockdown of sirtuin-7 inhibited NF-κB expression and resulted in a decrease in the expression of NF-κB target proteins that are anti-apoptotic: Bcl-xl, Bcl-2 and Mcl-1. Sirtuin-7 knockdown also resulted in an increase of the NF-κB target proteins that are pro-apoptotic: Caspase-3, Bad and Bax. In conclusion, the present study demonstrated that sirtuin-7 knockdown was able to markedly inhibit the growth of endometrial cancer cells, suggesting that sirtuin-7 may be a potential therapeutic target for endometrial cancer therapy.
Collapse
Affiliation(s)
- Shiqin Mao
- Department of Gynaecology, People's Hospital of Jingjiang, Jingjiang, Jiangsu 214500, P.R. China
| | - Jimin Ma
- Department of Gynaecology, The Third People's Hospital of Liaocheng, Liaocheng, Shandong 252000, P.R. China
| | - Hong Yu
- Department of Critical Care Medicine, Harbin Second Hospital, Harbin, Heilongjiang 150036, P.R. China
| |
Collapse
|
21
|
Jiang Y, Han Z, Wang Y, Hao W. Depletion of SIRT7 sensitizes human non-small cell lung cancer cells to gemcitabine therapy by inhibiting autophagy. Biochem Biophys Res Commun 2018; 506:266-271. [PMID: 30348528 DOI: 10.1016/j.bbrc.2018.10.089] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 10/14/2018] [Indexed: 01/13/2023]
Abstract
Anti-metabolic therapy, as a major chemotherapy, is an important option in the treatment of lung cancer. However, tumor resistance to cytotoxic chemotherapy has become more common. It has been reported that autophagy is one of the processes contributing to such resistance. In our study, we find that SIRT7 protein level elevated dramatically in response to an anti-metabolic drug-gemcitabine treatment. Moreover, autophagy induced by gemcitabine in non-small cell lung cancer cells is SIRT7-dependent. Furthermore, depletion of SIRT7 promoted Gemcitabine-induced cell death. Our report also shows that SIRT7 knockdown markedly improves the anti-tumor activity of gemcitabine treatment in mice. These results suggest that SIRT7-elicits an autophagic response that plays a protective role against cell death and the SIRT7-inhibition has a potential to improve the efficacy of anti-metabolic therapy in non-small cell lung cancer cells.
Collapse
Affiliation(s)
- Yunfei Jiang
- The Third Affiliated Hospital of Qiqihar Medical University, 161000, China
| | - Zhendong Han
- The Third Affiliated Hospital of Qiqihar Medical University, 161000, China
| | - Yu Wang
- The Third Affiliated Hospital of Qiqihar Medical University, 161000, China
| | - Wenbo Hao
- The Third Affiliated Hospital of Qiqihar Medical University, 161000, China.
| |
Collapse
|
22
|
Histone deacetylase SIRT6 regulates chemosensitivity in liver cancer cells via modulation of FOXO3 activity. Oncol Rep 2018; 40:3635-3644. [PMID: 30542728 PMCID: PMC6196608 DOI: 10.3892/or.2018.6770] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 10/03/2018] [Indexed: 12/23/2022] Open
Abstract
Liver cancer is the leading cause of cancer-related mortality worldwide and its incidence is increasing. Considerable effort has been made in recent decades to improve the diagnosis and treatment of liver cancer. Advanced liver cancer often exhibits a poor response to chemotherapy and poor prognosis due to acquired chemoresistance and tumor recurrence. Understanding the precise molecular mechanisms that are responsible for chemotherapeutic drug-induced cell death could potentially identify novel therapeutic targets and improve liver cancer treatment. In the present study, it was demonstrated that in response to doxorubicin, the most frequently used chemical compound for liver cancer treatment, histone deacetylase sirtuin 6 (SIRT6) is specifically downregulated. This enables forkhead box O3 (FOXO3) upregulation, translocation into the nucleus and increased expression of its target genes p27 and Bim, which further induce apoptosis. Overexpression of SIRT6, but not enzyme-inactivated mutants, prevents FOXO3 translocation into the nucleus and doxorubicin-induced cell death. SIRT6 interacts with FOXO3 and this interaction increases FOXO3 ubiquitination and decreases its stability. Finally, it was identified that the effect of SIRT6 in preventing doxorubicin-induced cell death requires FOXO3. Overexpression of SIRT6 could not prevent doxorubicin-induced cell death in FOXO3-knockdown cells. Therefore, it was concluded that SIRT6 plays a central role in determining doxorubicin-induced cell death via modulation of FOXO3 activity. Therapeutic targeting of SIRT6 and/or FOXO3 may offer novel strategies for treatment of liver cancer.
Collapse
|
23
|
Fang P, Xue Y, Zhang Y, Fan N, Ou L, Leng L, Pan J, Wang X. SIRT7 regulates the TGF-β1-induced proliferation and migration of mouse airway smooth muscle cells by modulating the expression of TGF-β receptor I. Biomed Pharmacother 2018; 104:781-787. [PMID: 29843083 DOI: 10.1016/j.biopha.2018.05.060] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 05/10/2018] [Accepted: 05/14/2018] [Indexed: 01/01/2023] Open
Abstract
Accumulating evidence shows that sirtuin 7 (SIRT7), a key mediator of many cellular activities, plays an important role in the pathogenesis of various diseases; however, little is known about the role of SIRT7 in asthma, which is characterized by airway remodeling. This study investigated the potential role of SIRT7 in regulating the proliferation and migration of airway smooth muscle (ASM) cells, which are critical events during airway remodeling in asthmatic conditions. The results demonstrated that SIRT7 expression was significantly upregulated in ASM cells treated with transforming growth factor-beta 1 (TGF-β1). Knockdown of SIRT7 inhibited the proliferation, promoted the apoptosis, and suppressed the migration of TGF-β1-treated ASM cells, while overexpression of SIRT7 had the opposite effect. Moreover, knockdown of SIRT7 inhibited protein expression of the TGF-β receptor I (TβRI), whilst overexpression of SIRT7 promoted the expression of TβRI. Importantly, knockdown of TβRI partially reversed the stimulatory effect of SIRT7 overexpression on the TGF-β1-induced proliferation and migration of ASM cells. Taken together, these results demonstrate that SIRT7 is involved in regulating TGF-β1-induced ASM cell proliferation and migration by regulating the expression of TβRI, thus indicating an important role of SIRT7 during airway remodeling in asthma.
Collapse
Affiliation(s)
- Ping Fang
- Division of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital, Xi'an Jiaotong University, School of Medicine, Xi'an, 710004, Shaanxi, PR China.
| | - Yu Xue
- Division of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital, Xi'an Jiaotong University, School of Medicine, Xi'an, 710004, Shaanxi, PR China; Internal Medicine Department, Section Four, Xi'an Chest Hospital, Xi'an, 710100, Shaanxi, PR China
| | - Yonghong Zhang
- Division of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital, Xi'an Jiaotong University, School of Medicine, Xi'an, 710004, Shaanxi, PR China
| | - Na Fan
- Division of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital, Xi'an Jiaotong University, School of Medicine, Xi'an, 710004, Shaanxi, PR China
| | - Ling Ou
- Division of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital, Xi'an Jiaotong University, School of Medicine, Xi'an, 710004, Shaanxi, PR China; Respiratory Department, Xi'an Children's Hospital, Xi'an, 7l0003, Shaanxi, PR China
| | - Lingjuan Leng
- Division of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital, Xi'an Jiaotong University, School of Medicine, Xi'an, 710004, Shaanxi, PR China; Internal Medicine, Hospital of Xidian University, Xi'an, 710126, Shaanxi, PR China
| | - Jianli Pan
- Division of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital, Xi'an Jiaotong University, School of Medicine, Xi'an, 710004, Shaanxi, PR China; Respiratory Department, Xi'an Children's Hospital, Xi'an, 7l0003, Shaanxi, PR China
| | - Xugeng Wang
- Division of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital, Xi'an Jiaotong University, School of Medicine, Xi'an, 710004, Shaanxi, PR China
| |
Collapse
|
24
|
Wang X, Song Y. MicroRNA-340 inhibits the growth and invasion of angiosarcoma cells by targeting SIRT7. Biomed Pharmacother 2018; 103:1061-1068. [PMID: 29710664 DOI: 10.1016/j.biopha.2018.04.148] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 04/19/2018] [Accepted: 04/19/2018] [Indexed: 12/12/2022] Open
Abstract
MicroRNAs (miRNAs) are emerging as critical regulators for the development and progression of various cancers, including angiosarcoma. Accumulating evidence suggests that miRNA-340 (miR-340) is an important cancer-associated miRNA. However, little is known about the role of miR-340 in angiosarcoma. In this study, we aimed to investigate the potential biological functions of miR-340 and its potential target gene in angiosarcoma. Our results showed that miR-340 expression was significantly decreased in angiosarcoma compared with normal controls. The overexpression of miR-340 inhibited the growth and invasion of angiosarcoma cells, while the inhibition of miR-340 showed the opposite effect. Bioinformatics analysis predicted that Sirtuin 7 (SIRT7) was a potential target gene of miR-340. The binding relationship between miR-340 and the SIRT7 3'-untranslated region was verified by dual-luciferase reporter assay. Moreover, our results showed that miR-340 negatively regulated SIRT7 expression in angiosarcoma cells and an inverse correlation between miR-340 and SIRT7 expression was shown in clinical angiosarcoma tissues. We found that silencing SIRT7 significantly inhibited the proliferation and invasion of angiosarcoma cells. Notably, the overexpression of SIRT7 promoted the proliferation and invasion of angiosarcoma cells and also partially reversed the antitumor effect of miR-340 on angiosarcoma cell proliferation and invasion. Taken together, our results demonstrate that miR-340 inhibits the growth and invasion of angiosarcoma cells by targeting SIRT7. Our study provides evidence that the miR-340/SIRT7 axis may play an important role in the molecular pathogenesis of angiosarcoma and suggests that miR-340 and SIRT7 may be used as potential and novel therapeutic targets for the treatment of angiosarcoma.
Collapse
Affiliation(s)
- Xiaoxin Wang
- Dermatological Department, Shaanxi Baoji People's Hospital, Baoji, Shaanxi, 721000, China
| | - Ying Song
- Dermatological Department, Shaanxi Baoji People's Hospital, Baoji, Shaanxi, 721000, China.
| |
Collapse
|
25
|
Tao NN, Zhou HZ, Tang H, Cai XF, Zhang WL, Ren JH, Zhou L, Chen X, Chen K, Li WY, Liu B, Yang QX, Cheng ST, Huang LX, Huang AL, Chen J. Sirtuin 3 enhanced drug sensitivity of human hepatoma cells through glutathione S-transferase pi 1/JNK signaling pathway. Oncotarget 2018; 7:50117-50130. [PMID: 27367026 PMCID: PMC5226572 DOI: 10.18632/oncotarget.10319] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Accepted: 06/16/2016] [Indexed: 12/22/2022] Open
Abstract
SIRT3, a class III histone deacetylase, has been implicated in various cancers as a novel therapeutic target. In hepatocellular carcinoma (HCC), we previously reported that SIRT3 induced cell apoptosis by regulating GSK-3β/Bax signaling pathway. Downregulation of SIRT3 in HCC cells facilitates tumor cell survival. In this study, we found that chemotherapeutic agents (doxorubicin, cisplatin and epirubicin) and sorafenib treatment downregulated SIRT3 mRNA and protein levels in three HCC cell lines. MTS assay found that SIRT3 overexpression sensitized liver cancer cells to chemotherapeutic agents and sorafenib in SMMC-7721, Huh-7 and PLC/PRF/5 cell lines. Moreover, SIRT3 overexpression promoted chemotherapeutic agents-induced or sorafenib-induced apoptosis as evidenced by flow cytometry, enhanced PARP cleavage and enhanced Caspase-9 cleavage in three HCC cells. In contrast, SIRT3 silencing increased drug resistance of HCC cells to chemotherapeutic agents. Mechanistic study found that SIRT3 downregulated the mRNA and protein levels of glutathione S-transferase pi 1 (GSTP1), which is a member of phase II detoxification enzymes families involved in metabolizing for chemotherapeutic agents. Moreover, SIRT3 decreased the amount of GSTP1 that was associated with JNK, which finally contributed the activation of JNK activity and activation of downstream target c-Jun and Bim. Importantly, GSTP1 overexpression or JNK inhibitor abolished SIRT3-induced apoptosis in HCC cells exposed to chemotherapeutic agents. Finally, there was a negative correlation between SIRT3 expression and GSTP1 expression in human HCC tissues. Together, our findings revealed SIRT3 could enhance the drug sensitivity of HCC cells to an array of chemotherapeutic agents. SIRT3 may serve as a potential target for improving the chemosensitivity of HCC patients.
Collapse
Affiliation(s)
- Na-Na Tao
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Hong-Zhong Zhou
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Hua Tang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Zhejiang, China
| | - Xue-Fei Cai
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Wen-Lu Zhang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Ji-Hua Ren
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Li Zhou
- Department of Epidemiology, School of Public Health and Management, Chongqing Medical University, Chongqing, China
| | - Xiang Chen
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Ke Chen
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Wan-Yu Li
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Bo Liu
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Qiu-Xia Yang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Sheng-Tao Cheng
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Li-Xia Huang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Ai-Long Huang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Zhejiang, China
| | - Juan Chen
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| |
Collapse
|
26
|
Wu D, Li Y, Zhu KS, Wang H, Zhu WG. Advances in Cellular Characterization of the Sirtuin Isoform, SIRT7. Front Endocrinol (Lausanne) 2018; 9:652. [PMID: 30510540 PMCID: PMC6253933 DOI: 10.3389/fendo.2018.00652] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 10/17/2018] [Indexed: 12/15/2022] Open
Abstract
SIRT7 is one of seven mammalian sirtuins that functions as an NAD+-dependent histone/protein deacetylase. SIRT7 is the least well-known member of the sirtuin family, but recent efforts have identified its involvement in various cellular processes, such as ribosome biogenesis, gene expression, cellular metabolism and cancer. Here we provide an update on the functions and mechanisms of SIRT7 in cellular regulation and disease.
Collapse
Affiliation(s)
- Di Wu
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Posttranslational Modifications and Cell Function, Peking University Health Science Center, School of Basic Medical Sciences, Beijing, China
- School of Basic Medical Sciences, Institute of Systems Biomedicine, Peking University Health Science Center, Beijing, China
| | - Yinglu Li
- Department of Biochemistry and Molecular Biology, Shenzhen University Health Science Center, Shenzhen, China
| | - Kathy S. Zhu
- Peking University Health Science Center, School of Public Health, Beijing, China
| | - Haiying Wang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Posttranslational Modifications and Cell Function, Peking University Health Science Center, School of Basic Medical Sciences, Beijing, China
- Department of Biochemistry and Molecular Biology, Peking University Health Science Center, School of Basic Medical Sciences, Beijing, China
- *Correspondence: Wei-Guo Zhu ;
| | - Wei-Guo Zhu
- Department of Biochemistry and Molecular Biology, Shenzhen University Health Science Center, Shenzhen, China
- Haiying Wang
| |
Collapse
|
27
|
Zhang C, Zhai Z, Tang M, Cheng Z, Li T, Wang H, Zhu WG. Quantitative proteome-based systematic identification of SIRT7 substrates. Proteomics 2017; 17. [PMID: 28556401 DOI: 10.1002/pmic.201600395] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 05/18/2017] [Accepted: 05/23/2017] [Indexed: 12/22/2022]
Abstract
SIRT7 is a class III histone deacetylase that is involved in numerous cellular processes. Only six substrates of SIRT7 have been reported thus far, so we aimed to systematically identify SIRT7 substrates using stable-isotope labeling with amino acids in cell culture (SILAC) coupled with quantitative mass spectrometry (MS). Using SIRT7+/+ and SIRT7-/- mouse embryonic fibroblasts as our model system, we identified and quantified 1493 acetylation sites in 789 proteins, of which 261 acetylation sites in 176 proteins showed ≥2-fold change in acetylation state between SIRT7-/- and SIRT7+/+ cells. These proteins were considered putative SIRT7 substrates and were carried forward for further analysis. We then validated the predictive efficiency of the SILAC-MS experiment by assessing substrate acetylation status in vitro in six predicted proteins. We also performed a bioinformatic analysis of the MS data, which indicated that many of the putative protein substrates were involved in metabolic processes. Finally, we expanded our list of candidate substrates by performing a bioinformatics-based prediction analysis of putative SIRT7 substrates, using our list of putative substrates as a positive training set, and again validated a subset of the proteins in vitro. In summary, we have generated a comprehensive list of SIRT7 candidate substrates.
Collapse
Affiliation(s)
- Chaohua Zhang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Posttranslational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, P. R. China
| | - Zichao Zhai
- Department of Biomedical Informatics, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, P. R. China
| | - Ming Tang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Posttranslational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, P. R. China.,Department of Biochemistry and Molecular Biology, School of Medicine, Shenzhen University, Shenzhen, P. R. China
| | - Zhongyi Cheng
- Jingjie PTM Biolab (Hangzhou) Co. Ltd, Hangzhou, P. R. China
| | - Tingting Li
- Department of Biomedical Informatics, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, P. R. China
| | - Haiying Wang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Posttranslational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, P. R. China
| | - Wei-Guo Zhu
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Posttranslational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, P. R. China.,Department of Biochemistry and Molecular Biology, School of Medicine, Shenzhen University, Shenzhen, P. R. China.,Peking University-Tsinghua University Center for Life Sciences, Beijing, P. R. China
| |
Collapse
|
28
|
Nuclear sirtuins and inflammatory signaling pathways. Cytokine Growth Factor Rev 2017; 38:98-105. [DOI: 10.1016/j.cytogfr.2017.11.001] [Citation(s) in RCA: 133] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 11/06/2017] [Indexed: 02/06/2023]
|
29
|
Li D, Li L. MicroRNA‑3666 inhibits breast cancer cell proliferation by targeting sirtuin 7. Mol Med Rep 2017; 16:8493-8500. [PMID: 28944911 DOI: 10.3892/mmr.2017.7603] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Accepted: 06/22/2017] [Indexed: 11/06/2022] Open
Abstract
The abnormal expression of microRNAs (miRNAs) is associated with cancer initiation and progression. miRNAs functioning as oncogenes or tumor suppressors represent novel biomarkers for cancer diagnosis, prognosis, and serve as therapeutic tools. MiR‑3666 has been reported as a tumor suppressor in various types of cancer; however, its role in breast cancer remains unknown. In the current study, the aim was to investigate the potential role of miR‑3666 in breast cancer. It was identified that miR‑3666 was decreased in breast cancer cell lines and that the overexpression of miR‑3666 inhibited breast cancer cell proliferation. Furthermore, miR‑3666 promotes cell apoptosis of breast cancer cells. Bioinformatics analysis and dual‑luciferase reporter assay demonstrated that miR‑3666 targeted the 3'‑untranslated region of sirtuin 7 (SIRT7) which was recognized as an oncogene. Overexpression of miR‑3666 decreased SIRT7 expression levels, and knockdown of SIRT7 suppressed proliferation and promoted apoptosis of breast cancer cells. A rescue assay demonstrated that the restoration of SIRT7 expression markedly reversed the miR‑3666‑induced anti‑tumor effects. Thus, the current study indicates that miR‑3666 suppresses breast cancer cell proliferation by targeting SIRT7, and propose miR‑3666 as a potential candidate for breast cancer therapy.
Collapse
Affiliation(s)
- Di Li
- Medical College of Inner Mongolia University for The Nationalities, Tongliao, Inner Mongolia 028000, P.R. China
| | - Lifei Li
- Department of Respiratory Medicine, Affiliated Hospital of Inner Mongolia University for The Nationalities, Tongliao, Inner Mongolia 028007, P.R. China
| |
Collapse
|
30
|
Wei W, Jing ZX, Ke Z, Yi P. Sirtuin 7 plays an oncogenic role in human osteosarcoma via downregulating CDC4 expression. Am J Cancer Res 2017; 7:1788-1803. [PMID: 28979804 PMCID: PMC5622216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Accepted: 08/10/2017] [Indexed: 06/07/2023] Open
Abstract
It is still a controversy whether the role of Sirtuin 7 (SIRT7) is an oncogene or a tumor suppressor gene in cancer as SIRT7 may have different functions in different types of cancer. Particularly, the specific roles of SIRT7 in the progression of osteosarcoma remain undiscovered. The main aim of this study is to identify the expression of SIRT7 in osteosarcoma and explore the biological functions of SIRT7 in regulating cellular processes of osteosarcoma cells. Here, we show that SIRT7 expression was significantly higher in osteosarcoma tissues and osteosarcoma cell lines than in non-tumor tissues and an immortalized normal cell line, respectively. Moreover, elevated SIRT7 levels in clinical samples indicate a poor prognosis of osteosarcoma patients. SIRT7 knockdown reduces proliferation, migration, invasion, tumor formation, and metastasis of osteosarcoma cells, while SIRT7 overexpression has the opposite effects. Mechanistically, SIRT7 down regulates H3K18ac expression and decreases H3K18ac binding to the promoter region of CDC4, leading to the inhibition of CDC4 transcription. Furthermore, the silencing of CDC4 partially rescued SIRT7 knockdown-mediated inhibitory effects on proliferation, migration, and invasion of osteosarcoma cells. In summary, our results show that SIRT7 promotes proliferation, migration, and invasion of osteosarcoma cells through targeting CDC4, suggesting a potential therapeutic target for SIRT7 based therapy for osteosarcoma.
Collapse
Affiliation(s)
- Wang Wei
- Department of Bone and Soft-Tissue Tumor Surgery, Cancer Hospital of China Medical UniversityShenyang 110042, Liaoning Province, PR China
- Department of Bone and Soft-Tissue Tumor Surgery, Liaoning Cancer Hospital & InstituteShenyang 110042, Liaoning Province, PR China
| | - Zhang Xiao Jing
- Department of Bone and Soft-Tissue Tumor Surgery, Cancer Hospital of China Medical UniversityShenyang 110042, Liaoning Province, PR China
- Department of Bone and Soft-Tissue Tumor Surgery, Liaoning Cancer Hospital & InstituteShenyang 110042, Liaoning Province, PR China
| | - Zheng Ke
- Department of Bone and Soft-Tissue Tumor Surgery, Cancer Hospital of China Medical UniversityShenyang 110042, Liaoning Province, PR China
- Department of Bone and Soft-Tissue Tumor Surgery, Liaoning Cancer Hospital & InstituteShenyang 110042, Liaoning Province, PR China
| | - Pei Yi
- Department of Bone and Soft-Tissue Tumor Surgery, Cancer Hospital of China Medical UniversityShenyang 110042, Liaoning Province, PR China
- Department of Bone and Soft-Tissue Tumor Surgery, Liaoning Cancer Hospital & InstituteShenyang 110042, Liaoning Province, PR China
| |
Collapse
|
31
|
Ianni A, Hoelper S, Krueger M, Braun T, Bober E. Sirt7 stabilizes rDNA heterochromatin through recruitment of DNMT1 and Sirt1. Biochem Biophys Res Commun 2017; 492:434-440. [PMID: 28842251 DOI: 10.1016/j.bbrc.2017.08.081] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 08/21/2017] [Indexed: 12/24/2022]
Abstract
Maintenance of highly compact heterochromatin at ribosomal DNA (rDNA) segments is essential to prevent homologous recombination between rDNA repeats and for preserving genomic stability and nucleolar architecture. Here, we investigated the role of Sirtuin 7 (Sirt7) in the regulation of rDNA chromatin structure, rDNA repeat stability and nucleolar organization. We found that Sirt7 mediates heterochromatin formation at rRNA genes through recruitment of DNA methyltransferase 1 and another member of the sirtuin family, Sirt1. Lack of Sirt7 leads to nucleolar fragmentation associated with hypomethylation of rDNA and hyperacetylation of histones at rDNA loci resulting in rDNA and genomic instability. Our findings suggest a novel role of Sirt7 in preventing cellular transformation by mediating maintenance of rDNA repeats and nucleolar integrity.
Collapse
Affiliation(s)
- Alessandro Ianni
- Max-Planck-Institute for Heart and Lung Research, Department of Cardiac Development and Remodeling, Ludwigstrasse 43, 61231 Bad Nauheim, Germany
| | - Soraya Hoelper
- Max-Planck-Institute for Heart and Lung Research, Department of Cardiac Development and Remodeling, Ludwigstrasse 43, 61231 Bad Nauheim, Germany
| | - Marcus Krueger
- Max-Planck-Institute for Heart and Lung Research, Department of Cardiac Development and Remodeling, Ludwigstrasse 43, 61231 Bad Nauheim, Germany
| | - Thomas Braun
- Max-Planck-Institute for Heart and Lung Research, Department of Cardiac Development and Remodeling, Ludwigstrasse 43, 61231 Bad Nauheim, Germany.
| | - Eva Bober
- Max-Planck-Institute for Heart and Lung Research, Department of Cardiac Development and Remodeling, Ludwigstrasse 43, 61231 Bad Nauheim, Germany.
| |
Collapse
|
32
|
Jiang L, Xiong J, Zhan J, Yuan F, Tang M, Zhang C, Cao Z, Chen Y, Lu X, Li Y, Wang H, Wang L, Wang J, Zhu WG, Wang H. Ubiquitin-specific peptidase 7 (USP7)-mediated deubiquitination of the histone deacetylase SIRT7 regulates gluconeogenesis. J Biol Chem 2017; 292:13296-13311. [PMID: 28655758 DOI: 10.1074/jbc.m117.780130] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 06/26/2017] [Indexed: 12/13/2022] Open
Abstract
Sirtuin 7 (SIRT7), a member of the NAD+-dependent class III histone deacetylases, is involved in the regulation of various cellular processes and in resisting various stresses, such as hypoxia, low glucose levels, and DNA damage. Interestingly, SIRT7 is linked to the control of glycolysis, suggesting a role in glucose metabolism. Given the important roles of SIRT7, it is critical to clarify how SIRT7 activity is potentially regulated. It has been reported that some transcriptional and post-transcriptional regulatory mechanisms are involved. However, little is known how SIRT7 is regulated by the post-translational modifications. Here, we identified ubiquitin-specific peptidase 7 (USP7), a deubiquitinase, as a negative regulator of SIRT7. We showed that USP7 interacts with SIRT7 both in vitro and in vivo, and we further demonstrated that SIRT7 undergoes endogenous Lys-63-linked polyubiquitination, which is removed by USP7. Although the USP7-mediated deubiquitination of SIRT7 had no effect on its stability, the deubiquitination repressed its enzymatic activity. We also showed that USP7 coordinates with SIRT7 to regulate the expression of glucose-6-phosphatase catalytic subunit (G6PC), a gluconeogenic gene. USP7 depletion by RNA interference increased both G6PC expression and SIRT7 enzymatic activity. Moreover, SIRT7 targeted the G6PC promoter through the transcription factor ELK4 but not through forkhead box O1 (FoxO1). In summary, SIRT7 is a USP7 substrate and has a novel role as a regulator of gluconeogenesis. Our study may provide the basis for new clinical approaches to treat metabolic disorders related to glucose metabolism.
Collapse
Affiliation(s)
- Lu Jiang
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Post-translational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, Peking University Health Science Center
| | - Jiannan Xiong
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Post-translational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, Peking University Health Science Center
| | - Junsi Zhan
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Post-translational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, Peking University Health Science Center
| | - Fengjie Yuan
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Post-translational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, Peking University Health Science Center
| | - Ming Tang
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Post-translational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, Peking University Health Science Center
| | - Chaohua Zhang
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Post-translational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, Peking University Health Science Center
| | - Ziyang Cao
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Post-translational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, Peking University Health Science Center
| | - Yongcan Chen
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Post-translational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, Peking University Health Science Center
| | - Xiaopeng Lu
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Post-translational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, Peking University Health Science Center
| | - Yinglu Li
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Post-translational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, Peking University Health Science Center
| | - Hui Wang
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Post-translational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, Peking University Health Science Center
| | - Lina Wang
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Post-translational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, Peking University Health Science Center
| | - Jiadong Wang
- Institute of Systems Biomedicine, Department of Radiation Medicine, School of Basic Medical Sciences, Peking University, Beijing 100191 and
| | - Wei-Guo Zhu
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Post-translational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, Peking University Health Science Center, .,Peking-Tsinghua University Center for Life Science, and.,the Department of Biochemistry and Molecular Biology, School of Medicine, Shenzhen University, Shenzhen 518060, China
| | - Haiying Wang
- From the Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing Key Laboratory of Protein Post-translational Modifications and Cell Function, Department of Biochemistry and Molecular Biology, Peking University Health Science Center,
| |
Collapse
|
33
|
Dass RA, Sarshad AA, Carson BB, Feenstra JM, Kaur A, Obrdlik A, Parks MM, Prakash V, Love DK, Pietras K, Serra R, Blanchard SC, Percipalle P, Brown AMC, Vincent CT. Wnt5a Signals through DVL1 to Repress Ribosomal DNA Transcription by RNA Polymerase I. PLoS Genet 2016; 12:e1006217. [PMID: 27500936 PMCID: PMC4976976 DOI: 10.1371/journal.pgen.1006217] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 07/05/2016] [Indexed: 11/19/2022] Open
Abstract
Ribosome biogenesis is essential for cell growth and proliferation and is commonly elevated in cancer. Accordingly, numerous oncogene and tumor suppressor signaling pathways target rRNA synthesis. In breast cancer, non-canonical Wnt signaling by Wnt5a has been reported to antagonize tumor growth. Here, we show that Wnt5a rapidly represses rDNA gene transcription in breast cancer cells and generates a chromatin state with reduced transcription of rDNA by RNA polymerase I (Pol I). These effects were specifically dependent on Dishevelled1 (DVL1), which accumulates in nucleolar organizer regions (NORs) and binds to rDNA regions of the chromosome. Upon DVL1 binding, the Pol I transcription activator and deacetylase Sirtuin 7 (SIRT7) releases from rDNA loci, concomitant with disassembly of Pol I transcription machinery at the rDNA promoter. These findings reveal that Wnt5a signals through DVL1 to suppress rRNA transcription. This provides a novel mechanism for how Wnt5a exerts tumor suppressive effects and why disruption of Wnt5a signaling enhances mammary tumor growth in vivo.
Collapse
Affiliation(s)
- Randall A. Dass
- Department of Cell and Developmental Biology, Weill Cornell Medical College, New York, New York, United States of America
- Department of Physiology and Biophysics, Weill Cornell Medical College, New York, New York, United States of America
| | - Aishe A. Sarshad
- Department of Cell and Molecular Biology, Karolinska Institute, Stockholm, Sweden
- Biology Program, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Brittany B. Carson
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Jennifer M. Feenstra
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Amanpreet Kaur
- Department of Cell and Developmental Biology, Weill Cornell Medical College, New York, New York, United States of America
| | - Ales Obrdlik
- Department of Cell and Molecular Biology, Karolinska Institute, Stockholm, Sweden
- Biology Program, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Matthew M. Parks
- Department of Physiology and Biophysics, Weill Cornell Medical College, New York, New York, United States of America
| | - Varsha Prakash
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Damon K. Love
- Department of Cell and Developmental Biology, Weill Cornell Medical College, New York, New York, United States of America
| | - Kristian Pietras
- Department of Laboratory Medicine, Center for Molecular Pathology, Lund University, Lund, Sweden
| | - Rosa Serra
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Scott C. Blanchard
- Department of Physiology and Biophysics, Weill Cornell Medical College, New York, New York, United States of America
- Tri-Institutional PhD program in Chemical Biology, Weill Cornell Medical College, New York, New York, United States of America
| | - Piergiorgio Percipalle
- Department of Cell and Molecular Biology, Karolinska Institute, Stockholm, Sweden
- Biology Program, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
- * E-mail: (PP); (AMCB); (CTV)
| | - Anthony M. C. Brown
- Department of Cell and Developmental Biology, Weill Cornell Medical College, New York, New York, United States of America
- * E-mail: (PP); (AMCB); (CTV)
| | - C. Theresa Vincent
- Department of Cell and Developmental Biology, Weill Cornell Medical College, New York, New York, United States of America
- Department of Physiology and Biophysics, Weill Cornell Medical College, New York, New York, United States of America
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
- * E-mail: (PP); (AMCB); (CTV)
| |
Collapse
|
34
|
Abstract
Histone posttranslational modifications represent a versatile set of epigenetic marks involved not only in dynamic cellular processes, such as transcription and DNA repair, but also in the stable maintenance of repressive chromatin. In this article, we review many of the key and newly identified histone modifications known to be deregulated in cancer and how this impacts function. The latter part of the article addresses the challenges and current status of the epigenetic drug development process as it applies to cancer therapeutics.
Collapse
Affiliation(s)
- James E Audia
- Constellation Pharmaceuticals, Cambridge, Massachusetts 02142
| | - Robert M Campbell
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285
| |
Collapse
|
35
|
Jacobi JL, Yang B, Li X, Menze AK, Laurentz SM, Janle EM, Ferruzzi MG, McCabe GP, Chapple C, Kirchmaier AL. Impacts on Sirtuin Function and Bioavailability of the Dietary Bioactive Compound Dihydrocoumarin. PLoS One 2016; 11:e0149207. [PMID: 26882112 PMCID: PMC4755582 DOI: 10.1371/journal.pone.0149207] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 01/28/2016] [Indexed: 12/18/2022] Open
Abstract
The plant secondary metabolite and common food additive dihydrocoumarin (DHC) is an inhibitor of the Sirtuin family of NAD+-dependent deacetylases. Sirtuins are key regulators of epigenetic processes that maintain silent chromatin in yeast and have been linked to gene expression, metabolism, apoptosis, tumorogenesis and age-related processes in multiple organisms, including humans. Here we report that exposure to the polyphenol DHC led to defects in several Sirtuin-regulated processes in budding yeast including the establishment and maintenance of Sir2p-dependent silencing by causing disassembly of silent chromatin, Hst1p-dependent repression of meiotic-specific genes during the mitotic cell cycle. As both transient and prolonged exposure to environmental and dietary factors have the potential to lead to heritable alterations in epigenetic states and to modulate additional Sirtuin-dependent phenotypes, we examined the bioavailability and digestive stability of DHC using an in vivo rat model and in vitro digestive simulator. Our analyses revealed that DHC was unstable during digestion and could be converted to melilotic acid (MA), which also caused epigenetic defects, albeit less efficiently. Upon ingestion, DHC was observed primarily in intestinal tissues, but did not accumulate over time and was readily cleared from the animals. MA displayed a wider tissue distribution and, in contrast to DHC, was also detected in the blood plasma, interstitial fluid, and urine, implying that the conversion of DHC to the less bioactive compound, MA, occurred efficiently in vivo.
Collapse
Affiliation(s)
- Jennifer L. Jacobi
- Department of Biochemistry, Purdue University, West Lafayette, Indiana, United States of America
- Purdue Center for Cancer Research, Purdue University, West Lafayette, Indiana, United States of America
| | - Bo Yang
- Department of Biochemistry, Purdue University, West Lafayette, Indiana, United States of America
- Purdue Center for Cancer Research, Purdue University, West Lafayette, Indiana, United States of America
| | - Xu Li
- Department of Biochemistry, Purdue University, West Lafayette, Indiana, United States of America
| | - Anna K. Menze
- Department of Foods and Nutrition, Purdue University, West Lafayette, Indiana, United States of America
| | - Sara M. Laurentz
- Department of Statistics, Purdue University, West Lafayette, Indiana, United States of America
| | - Elsa M. Janle
- Department of Foods and Nutrition, Purdue University, West Lafayette, Indiana, United States of America
| | - Mario G. Ferruzzi
- Department of Food Science, Purdue University, West Lafayette, Indiana, United States of America
| | - George P. McCabe
- Department of Statistics, Purdue University, West Lafayette, Indiana, United States of America
| | - Clint Chapple
- Department of Biochemistry, Purdue University, West Lafayette, Indiana, United States of America
| | - Ann L. Kirchmaier
- Department of Biochemistry, Purdue University, West Lafayette, Indiana, United States of America
- Purdue Center for Cancer Research, Purdue University, West Lafayette, Indiana, United States of America
- * E-mail:
| |
Collapse
|
36
|
Chen S, Blank MF, Iyer A, Huang B, Wang L, Grummt I, Voit R. SIRT7-dependent deacetylation of the U3-55k protein controls pre-rRNA processing. Nat Commun 2016; 7:10734. [PMID: 26867678 PMCID: PMC4754350 DOI: 10.1038/ncomms10734] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 01/15/2016] [Indexed: 01/20/2023] Open
Abstract
SIRT7 is an NAD+-dependent protein deacetylase with important roles in ribosome biogenesis and cell proliferation. Previous studies have established that SIRT7 is associated with RNA polymerase I, interacts with pre-ribosomal RNA (rRNA) and promotes rRNA synthesis. Here we show that SIRT7 is also associated with small nucleolar RNP (snoRNPs) that are involved in pre-rRNA processing and rRNA maturation. Knockdown of SIRT7 impairs U3 snoRNA dependent early cleavage steps that are necessary for generation of 18S rRNA. Mechanistically, SIRT7 deacetylates U3-55k, a core component of the U3 snoRNP complex, and reversible acetylation of U3-55k modulates the association of U3-55k with U3 snoRNA. Deacetylation by SIRT7 enhances U3-55k binding to U3 snoRNA, which is a prerequisite for pre-rRNA processing. Under stress conditions, SIRT7 is released from nucleoli, leading to hyperacetylation of U3-55k and attenuation of pre-rRNA processing. The results reveal a multifaceted role of SIRT7 in ribosome biogenesis, regulating both transcription and processing of rRNA. SIRT7 is a protein deacetylase with important roles in rRNA synthesis, ribosome biogenesis and cell proliferation. Here the authors show a role of SIRT7 in rRNA maturation via deacetylation of U3-55k, a core component of the U3 snoRNP complex.
Collapse
Affiliation(s)
- Sifan Chen
- Division of Molecular Biology of the Cell II, German Cancer Research Center, DKFZ-ZMBH Alliance, Im Neuenheimer Fed 581, 69120 Heidelberg, Germany
| | - Maximilian Felix Blank
- Division of Molecular Biology of the Cell II, German Cancer Research Center, DKFZ-ZMBH Alliance, Im Neuenheimer Fed 581, 69120 Heidelberg, Germany
| | - Aishwarya Iyer
- Division of Molecular Biology of the Cell II, German Cancer Research Center, DKFZ-ZMBH Alliance, Im Neuenheimer Fed 581, 69120 Heidelberg, Germany
| | - Bingding Huang
- Division of Theoretical Bioinformatics, German Cancer Research Center, 69120 Heidelberg, Germany
| | - Lin Wang
- Genomics and Proteomics Core Facility, German Cancer Research Center, 69120 Heidelberg, Germany
| | - Ingrid Grummt
- Division of Molecular Biology of the Cell II, German Cancer Research Center, DKFZ-ZMBH Alliance, Im Neuenheimer Fed 581, 69120 Heidelberg, Germany
| | - Renate Voit
- Division of Molecular Biology of the Cell II, German Cancer Research Center, DKFZ-ZMBH Alliance, Im Neuenheimer Fed 581, 69120 Heidelberg, Germany
| |
Collapse
|
37
|
Martin A, Tegla CA, Cudrici CD, Kruszewski AM, Azimzadeh P, Boodhoo D, Mekala AP, Rus V, Rus H. Role of SIRT1 in autoimmune demyelination and neurodegeneration. Immunol Res 2015; 61:187-97. [PMID: 25281273 DOI: 10.1007/s12026-014-8557-5] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Multiple sclerosis (MS) is a demyelinating disease characterized by chronic inflammation of the central nervous system, in which many factors can act together to influence disease susceptibility and progression. SIRT1 is a member of the histone deacetylase class III family of proteins and is an NAD(+)-dependent histone and protein deacetylase. SIRT1 can induce chromatin silencing through the deacetylation of histones and plays an important role as a key regulator of a wide variety of cellular and physiological processes including DNA damage, cell survival, metabolism, aging, and neurodegeneration. It has gained a lot of attention recently because many studies in animal models of demyelinating and neurodegenerative diseases have shown that SIRT1 induction can ameliorate the course of the disease. SIRT1 expression was found to be decreased in the peripheral blood mononuclear cells of MS patients during relapses. SIRT1 represents a possible biomarker of relapses and a potential new target for therapeutic intervention in MS. Modulation of SIRT1 may be a valuable strategy for treating or preventing MS and neurodegenerative central nervous system disorders.
Collapse
Affiliation(s)
- Alvaro Martin
- Department of Neurology, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Stabilization of SIRT7 deacetylase by viral oncoprotein HBx leads to inhibition of growth restrictive RPS7 gene and facilitates cellular transformation. Sci Rep 2015; 5:14806. [PMID: 26442981 PMCID: PMC4595800 DOI: 10.1038/srep14806] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 09/09/2015] [Indexed: 02/06/2023] Open
Abstract
Sirtuin-7 (SIRT7) deacetylase exhibits a high selectivity for acetylated H3K18 and has been implicated in the maintenance of malignant phenotype. However, it remains unclear if SIRT7 and H3K18ac play a role in the tumorigenic program driven by oncogenic viruses. We show that ectopically expressed HBx oncoprotein of hepatitis B virus promoted intracellular stability of SIRT7 by salvaging it from ubiquitin-mediated proteasomal degradation. HBx-dependent accumulation of SIRT7 favored H3K18 deacetylation and down-regulated the small ribosomal protein gene, RPS7, involved in cell death and DNA damage response. HBx facilitated the recruitment of SIRT7 to RPS7 promoter thus impeding H3K18ac occupancy and hindering RPS7 transcription. The antagonistic relationship between SIRT7 and RPS7 was also observed in the HBx transgenic mice, where elevated levels of SIRT7 protein were coincident with low levels of H3K18ac and RPS7. Strikingly, inhibition of cellular deubiquitinase activity restored RPS7 gene transcription. Further, depletion of endogenous SIRT7 led to decreased cell viability and transformation. The biological relevance of RPS7 suppression by HBx-SIRT7 axis was evident from ectopic expression of RPS7 which attenuated clonogenicity of cells. Thus, our findings suggest that SIRT7 is a critical regulator of HBx-driven oncogenic program, through its antagonistic impact on growth restrictive ribosomal protein RPS7.
Collapse
|
39
|
Ghosh S, Zhou Z. SIRTain regulators of premature senescence and accelerated aging. Protein Cell 2015; 6:322-33. [PMID: 25907989 PMCID: PMC4417679 DOI: 10.1007/s13238-015-0149-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 02/28/2015] [Indexed: 12/11/2022] Open
Abstract
The sirtuin proteins constitute class III histone deacetylases (HDACs). These evolutionarily conserved NAD(+)-dependent enzymes form an important component in a variety of cellular and biological processes with highly divergent as well as convergent roles in maintaining metabolic homeostasis, safeguarding genomic integrity, regulating cancer metabolism and also inflammatory responses. Amongst the seven known mammalian sirtuin proteins, SIRT1 has gained much attention due to its widely acknowledged roles in promoting longevity and ameliorating age-associated pathologies. The contributions of other sirtuins in the field of aging are also gradually emerging. Here, we summarize some of the recent discoveries in sirtuins biology which clearly implicate the functions of sirtuin proteins in the regulation of premature cellular senescence and accelerated aging. The roles of sirtuins in various cellular processes have been extrapolated to draw inter-linkage with anti-aging mechanisms. Also, the latest findings on sirtuins which might have potential effects in the process of aging have been reviewed.
Collapse
Affiliation(s)
- Shrestha Ghosh
- Department of Biochemistry, The University of Hong Kong, Hong Kong, China
| | - Zhongjun Zhou
- Department of Biochemistry, The University of Hong Kong, Hong Kong, China
- Shenzhen Institute of Innovation and Technology, The University of Hong Kong, Hong Kong, China
| |
Collapse
|
40
|
SIRT7 inactivation reverses metastatic phenotypes in epithelial and mesenchymal tumors. Sci Rep 2015; 5:9841. [PMID: 25923013 PMCID: PMC4413894 DOI: 10.1038/srep09841] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Accepted: 03/23/2015] [Indexed: 01/27/2023] Open
Abstract
Metastasis is responsible for over 90% of cancer-associated mortality. In epithelial
carcinomas, a key process in metastatic progression is the epigenetic reprogramming
of an epithelial-to-mesenchymal transition-like (EMT) change towards invasive
cellular phenotypes. In non-epithelial cancers, different mechanisms must underlie
metastatic change, but relatively little is known about the factors involved. Here,
we identify the chromatin regulatory Sirtuin factor SIRT7 as a key regulator of
metastatic phenotypes in both epithelial and mesenchymal cancer cells. In epithelial
prostate carcinomas, high SIRT7 levels are associated with aggressive cancer
phenotypes, metastatic disease, and poor patient prognosis, and depletion of SIRT7
can reprogram these cells to a less aggressive phenotype. Interestingly, SIRT7 is
also important for maintaining the invasiveness and metastatic potential of
non-epithelial sarcoma cells. Moreover, SIRT7 inactivation dramatically suppresses
cancer cell metastasis in vivo, independent of changes in primary tumor
growth. Mechanistically, we also uncover a novel link between SIRT7 and its family
member SIRT1, providing the first demonstration of direct interaction and functional
interplay between two mammalian sirtuins. Together with previous work, our findings
highlight the broad role of SIRT7 in maintaining the metastatic cellular phenotype
in diverse cancers.
Collapse
|
41
|
Kleszcz R, Paluszczak J, Baer-Dubowska W. Targeting aberrant cancer metabolism - The role of sirtuins. Pharmacol Rep 2015; 67:1068-80. [PMID: 26481524 DOI: 10.1016/j.pharep.2015.03.021] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 03/27/2015] [Accepted: 03/31/2015] [Indexed: 12/23/2022]
Abstract
Cancer cells, as opposed to normal cells, generate energy by increasing aerobic glycolysis, which is a phenomenon called "the Warburg effect". An altered energy metabolism supporting continuous cell growth and proliferation was pointed to as the new "hallmark" of cancer cells. Several hypotheses have been proposed to explain the maintenance of this seemingly wasteful catabolic state. The epigenetic mechanisms which depend on the covalent modifications of both DNA and histones have recently emerged as important players in the regulation of glucose metabolism. The sirtuin family of histone deacetylases has emerged as important regulators of diverse physiological and pathological events, including cancer metabolism. Sirtuins 1-7 (SIRT1-7) belong to class III of histone deacetylase enzymes which are dependent on NAD(+) for activity. It was recently demonstrated that SIRT6 is a tumor suppressor that modulates aerobic glycolysis by repressing HIF1 transcription. Members of this family of enzymes are considered promising pharmaceutical targets for cancer treatment. This review highlights the major functions of sirtuins in relation to cancer metabolism and the possibilities of their activation and inhibition by small molecule drugs.
Collapse
Affiliation(s)
- Robert Kleszcz
- Department of Pharmaceutical Biochemistry, Poznan University of Medical Sciences, Poznań, Poland
| | - Jarosław Paluszczak
- Department of Pharmaceutical Biochemistry, Poznan University of Medical Sciences, Poznań, Poland
| | - Wanda Baer-Dubowska
- Department of Pharmaceutical Biochemistry, Poznan University of Medical Sciences, Poznań, Poland.
| |
Collapse
|