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Sipos F, Műzes G. Sirtuins Affect Cancer Stem Cells via Epigenetic Regulation of Autophagy. Biomedicines 2024; 12:386. [PMID: 38397988 PMCID: PMC10886574 DOI: 10.3390/biomedicines12020386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 02/01/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024] Open
Abstract
Sirtuins (SIRTs) are stress-responsive proteins that regulate several post-translational modifications, partly by acetylation, deacetylation, and affecting DNA methylation. As a result, they significantly regulate several cellular processes. In essence, they prolong lifespan and control the occurrence of spontaneous tumor growth. Members of the SIRT family have the ability to govern embryonic, hematopoietic, and other adult stem cells in certain tissues and cell types in distinct ways. Likewise, they can have both pro-tumor and anti-tumor effects on cancer stem cells, contingent upon the specific tissue from which they originate. The impact of autophagy on cancer stem cells, which varies depending on the specific circumstances, is a very intricate phenomenon that has significant significance for clinical and therapeutic purposes. SIRTs exert an impact on the autophagy process, whereas autophagy reciprocally affects the activity of certain SIRTs. The mechanism behind this connection in cancer stem cells remains poorly understood. This review presents the latest findings that position SIRTs at the point where cancer cells and autophagy interact. Our objective is to highlight the various roles of distinct SIRTs in cancer stem cell-related functions through autophagy. This would demonstrate their significance in the genesis and recurrence of cancer and offer a more precise understanding of their treatment possibilities in relation to autophagy.
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Affiliation(s)
- Ferenc Sipos
- Immunology Division, Department of Internal Medicine and Hematology, Semmelweis University, 1088 Budapest, Hungary;
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2
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Andreani C, Bartolacci C, Persico G, Casciaro F, Amatori S, Fanelli M, Giorgio M, Galié M, Tomassoni D, Wang J, Zhang X, Bick G, Coppari R, Marchini C, Amici A. SIRT6 promotes metastasis and relapse in HER2-positive breast cancer. Sci Rep 2023; 13:22000. [PMID: 38081972 PMCID: PMC10713583 DOI: 10.1038/s41598-023-49199-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 12/05/2023] [Indexed: 12/18/2023] Open
Abstract
The histone deacetylase sirtuin 6 (SIRT6) has been endowed with anti-cancer capabilities in many tumor types. Here, we investigate the impact of SIRT6-overexpression (SIRT6-OE) in Delta16HER2 mice, which are a bona fide model of HER2-positive breast cancer. After an initial delay in the tumor onset, SIRT6-OE induces a more aggressive phenotype of Delta16HER2 tumors promoting the formation of higher number of tumor foci and metastases than controls. This phenotype of SIRT6-OE tumors is associated with cancer stem cell (CSC)-like features and tumor dormancy, and low senescence and oxidative DNA damage. Accordingly, a sub-set of HER2-positive breast cancer patients with concurrent SIRT6-OE has a significant poorer relapse-free survival (RFS) probability than patients with low expression of SIRT6. ChIP-seq, RNA-seq and RT-PCR experiments indicate that SIRT6-OE represses the expression of the T-box transcription factor 3 (Tbx3) by deacetylation of H3K9ac. Accordingly, loss-of-function mutations of TBX3 or low TBX3 expression levels are predictive of poor prognosis in HER2-positive breast cancer patients. Our work indicates that high levels of SIRT6 are indicative of poor prognosis and high risk of metastasis in HER2-positive breast cancer and suggests further investigation of TBX3 as a downstream target of SIRT6 and co-marker of poor-prognosis. Our results point to a breast cancer subtype-specific effect of SIRT6 and warrant future studies dissecting the mechanisms of SIRT6 regulation in different breast cancer subtypes.
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Affiliation(s)
- Cristina Andreani
- Department of Biosciences and Veterinary Medicine, University of Camerino, 62032, Camerino, Italy.
- Department of Internal Medicine, University of Cincinnati, 45219, Cincinnati, OH, USA.
| | - Caterina Bartolacci
- Department of Biosciences and Veterinary Medicine, University of Camerino, 62032, Camerino, Italy
- Department of Internal Medicine, University of Cincinnati, 45219, Cincinnati, OH, USA
| | - Giuseppe Persico
- Department of Experimental Oncology, IRCCS-European Institute of Oncology, Via Adamello 16, 20139, Milano, Italy
| | - Francesca Casciaro
- Department of Biomedical Sciences, University of Padua, Via Ugo Bassi 58/B, 35131, Padua, Italy
| | - Stefano Amatori
- Molecular Pathology Laboratory "PaoLa", Department of Biomolecular Sciences, University of Urbino Carlo Bo, 61032, Fano, Italy
| | - Mirco Fanelli
- Molecular Pathology Laboratory "PaoLa", Department of Biomolecular Sciences, University of Urbino Carlo Bo, 61032, Fano, Italy
| | - Marco Giorgio
- Department of Experimental Oncology, IRCCS-European Institute of Oncology, Via Adamello 16, 20139, Milano, Italy
- Department of Biomedical Sciences, University of Padua, Via Ugo Bassi 58/B, 35131, Padua, Italy
| | - Mirco Galié
- Department of Neuroscience, Biomedicine and Movement, Section of Anatomy and Histology, University of Verona, 37134, Verona, Italy
| | - Daniele Tomassoni
- Department of Biosciences and Veterinary Medicine, University of Camerino, 62032, Camerino, Italy
| | - Junbiao Wang
- Department of Biosciences and Veterinary Medicine, University of Camerino, 62032, Camerino, Italy
| | - Xiaoting Zhang
- Department of Cancer Biology, University of Cincinnati, 45219, Cincinnati, OH, USA
| | - Gregory Bick
- Department of Cancer Biology, University of Cincinnati, 45219, Cincinnati, OH, USA
| | - Roberto Coppari
- Department of Cell Physiology and Metabolism, University of Geneva, 1211, Geneva, Switzerland
- Diabetes Center of the Faculty of Medicine, University of Geneva, 1211, Geneva, Switzerland
| | - Cristina Marchini
- Department of Biosciences and Veterinary Medicine, University of Camerino, 62032, Camerino, Italy.
| | - Augusto Amici
- Department of Biosciences and Veterinary Medicine, University of Camerino, 62032, Camerino, Italy
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3
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O'Brien C, Ling T, Berman JM, Culp-Hill R, Reisz JA, Rondeau V, Jahangiri S, St-Germain J, Macwan V, Astori A, Zeng A, Hong JY, Li M, Yang M, Jana S, Gamboni F, Tsao E, Liu W, Dick JE, Lin H, Melnick A, Tikhonova A, Arruda A, Minden MD, Raught B, D'Alessandro A, Jones CL. Simultaneous inhibition of Sirtuin 3 and cholesterol homeostasis targets acute myeloid leukemia stem cells by perturbing fatty acid β-oxidation and inducing lipotoxicity. Haematologica 2023; 108:2343-2357. [PMID: 37021547 PMCID: PMC10483359 DOI: 10.3324/haematol.2022.281894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 03/30/2023] [Indexed: 04/07/2023] Open
Abstract
Outcomes for patients with acute myeloid leukemia (AML) remain poor due to the inability of current therapeutic regimens to fully eradicate disease-initiating leukemia stem cells (LSC). Previous studies have demonstrated that oxidative phosphorylation (OXPHOS) is an essential process that is targetable in LSC. Sirtuin 3 (SIRT3), a mitochondrial deacetylase with a multi-faceted role in metabolic regulation, has been shown to regulate OXPHOS in cancer models; however, it has not yet been studied in the context of LSC. Thus, we sought to identify if SIRT3 is important for LSC function. Using RNAi and a SIRT3 inhibitor (YC8-02), we demonstrate that SIRT3 is a critical target for the survival of primary human LSC but is not essential for normal human hematopoietic stem and progenitor cell function. In order to elucidate the molecular mechanisms by which SIRT3 is essential in LSC we combined transcriptomic, proteomic, and lipidomic approaches, showing that SIRT3 is important for LSC function through the regulation of fatty acid oxidation (FAO) which is required to support OXPHOS and ATP production in human LSC. Further, we discovered two approaches to further sensitize LSC to SIRT3 inhibition. First, we found that LSC tolerate the toxic effects of fatty acid accumulation induced by SIRT3 inhibition by upregulating cholesterol esterification. Disruption of cholesterol homeostasis sensitizes LSC to YC8-02 and potentiates LSC death. Second, SIRT3 inhibition sensitizes LSC to the BCL-2 inhibitor venetoclax. Together, these findings establish SIRT3 as a regulator of lipid metabolism and potential therapeutic target in primitive AML cells.
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Affiliation(s)
- Cristiana O'Brien
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Tianyi Ling
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Jacob M Berman
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Rachel Culp-Hill
- Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Julie A Reisz
- Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Vincent Rondeau
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Soheil Jahangiri
- Department of Medical Biophysics, University of Toronto, Toronto, Canada; Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | | | - Vinitha Macwan
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Audrey Astori
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Andy Zeng
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Jun Young Hong
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA
| | - Meng Li
- Department of Medicine, Division of Hematology and Medical Oncology, Weill Cornell Medical College, New York, NY, USA
| | - Min Yang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA
| | - Sadhan Jana
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA
| | - Fabia Gamboni
- Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Emily Tsao
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Weiyi Liu
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - John E Dick
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Hening Lin
- Howard Hughes Medical Institute; Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA
| | - Ari Melnick
- Department of Medicine, Division of Hematology and Medical Oncology, Weill Cornell Medical College, New York, NY, USA
| | - Anastasia Tikhonova
- Department of Medical Biophysics, University of Toronto, Toronto, Canada; Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Andrea Arruda
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Mark D Minden
- Department of Medical Biophysics, University of Toronto, Toronto, Canada; Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Brian Raught
- Department of Medical Biophysics, University of Toronto, Toronto, Canada; Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Angelo D'Alessandro
- Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Courtney L Jones
- Department of Medical Biophysics, University of Toronto, Toronto, Canada; Princess Margaret Cancer Centre, University Health Network, Toronto, Canada.
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4
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You Y, Liang W. SIRT1 and SIRT6: The role in aging-related diseases. Biochim Biophys Acta Mol Basis Dis 2023; 1869:166815. [PMID: 37499928 DOI: 10.1016/j.bbadis.2023.166815] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 06/26/2023] [Accepted: 07/19/2023] [Indexed: 07/29/2023]
Abstract
Aging is characterized by progressive functional deterioration with increased risk of mortality. It is a complex biological process driven by a multitude of intertwined mechanisms such as increased DNA damage, chronic inflammation, and metabolic dysfunction. Sirtuins (SIRTs) are a family of NAD+-dependent enzymes that regulate fundamental biological functions from genomic stability and lifespan to energy metabolism and tumorigenesis. Of the seven mammalian SIRT isotypes (SIRT1-7), SIRT1 and SIRT6 are well-recognized for regulating signaling pathways related to aging. Herein, we review the protective role of SIRT1 and SIRT6 in aging-related diseases at molecular, cellular, tissue, and whole-organism levels. We also discuss the therapeutic potential of SIRT1 and SIRT6 modulators in the treatment of these diseases and challenges thereof.
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Affiliation(s)
- Yuzi You
- Department of General Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200025, China
| | - Wei Liang
- Department of Geriatrics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200025, China.
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5
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Onyiba CI, Scarlett CJ, Weidenhofer J. The Mechanistic Roles of Sirtuins in Breast and Prostate Cancer. Cancers (Basel) 2022; 14:cancers14205118. [PMID: 36291902 PMCID: PMC9600935 DOI: 10.3390/cancers14205118] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/06/2022] [Accepted: 10/14/2022] [Indexed: 12/02/2022] Open
Abstract
Simple Summary There are diverse reports of the dual role of sirtuin genes and proteins in breast and prostate cancers. This review discusses the current information on the tumor promotion or suppression roles of SIRT1–7 in breast and prostate cancers. Precisely, we highlight that sirtuins regulate various proteins implicated in proliferation, apoptosis, autophagy, chemoresistance, invasion, migration, and metastasis of both breast and prostate cancer. We also provide evidence of the direct regulation of sirtuins by miRNAs, highlighting the consequences of this regulation in breast and prostate cancer. Overall, this review reveals the potential value of sirtuins as biomarkers and/or targets for improved treatment of breast and prostate cancers. Abstract Mammalian sirtuins (SIRT1–7) are involved in a myriad of cellular processes, including apoptosis, proliferation, differentiation, epithelial-mesenchymal transition, aging, DNA repair, senescence, viability, survival, and stress response. In this review, we discuss the current information on the mechanistic roles of SIRT1–7 and their downstream effects (tumor promotion or suppression) in cancers of the breast and prostate. Specifically, we highlight the involvement of sirtuins in the regulation of various proteins implicated in proliferation, apoptosis, autophagy, chemoresistance, invasion, migration, and metastasis of breast and prostate cancer. Additionally, we highlight the available information regarding SIRT1–7 regulation by miRNAs, laying much emphasis on the consequences in the progression of breast and prostate cancer.
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Affiliation(s)
- Cosmos Ifeanyi Onyiba
- School of Biomedical Sciences and Pharmacy, College of Health, Medicine and Wellbeing, University of Newcastle, Ourimbah, NSW 2258, Australia
- Correspondence:
| | - Christopher J. Scarlett
- School of Environmental and Life Sciences, College of Engineering, Science and Environment, University of Newcastle, Ourimbah, NSW 2258, Australia
- Hunter Medical Research Institute, New Lambton Heights, NSW 2305, Australia
| | - Judith Weidenhofer
- School of Biomedical Sciences and Pharmacy, College of Health, Medicine and Wellbeing, University of Newcastle, Ourimbah, NSW 2258, Australia
- Hunter Medical Research Institute, New Lambton Heights, NSW 2305, Australia
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6
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Chen Z, Ioris RM, Richardson S, Van Ess AN, Vendrell I, Kessler BM, Buffa FM, Busino L, Clifford SC, Bullock AN, D'Angiolella V. Disease-associated KBTBD4 mutations in medulloblastoma elicit neomorphic ubiquitylation activity to promote CoREST degradation. Cell Death Differ 2022; 29:1955-1969. [PMID: 35379950 PMCID: PMC9525703 DOI: 10.1038/s41418-022-00983-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 03/10/2022] [Accepted: 03/11/2022] [Indexed: 12/30/2022] Open
Abstract
Medulloblastoma is the most common malignant brain tumour in children. Genomic studies have identified distinct disease subgroups: wnt/wingless (WNT), sonic hedgehog (SHH), and non-WNT/non-SHH, comprising group 3 and group 4. Alterations in WNT and SHH signalling form the pathogenetic basis for their subgroups, whereas those for non-WNT/non-SHH tumours remain largely elusive. Recent analyses have revealed recurrent in-frame insertions in the E3 ubiquitin ligase adaptor Kelch Repeat and BTB Domain Containing 4 (KBTBD4) in cases of group 3/4 medulloblastoma. Critically, group 3/4 tumours with KBTBD4 mutations typically lack other gene-specific alterations, such as MYC amplification, indicating KBTBD4 insertion mutations as the primary genetic driver. Delineating the role of KBTBD4 mutations thus offers significant opportunities to understand tumour pathogenesis and to exploit the underpinning mechanisms therapeutically. Here, we show a novel mechanism in cancer pathogenesis whereby indel mutations in KBTBD4 drive its recognition of neo-substrates for degradation. We observe that KBTBD4 mutants promote the recruitment and ubiquitylation of the REST Corepressor (CoREST), which forms a complex to modulate chromatin accessibility and transcriptional programmes. The degradation of CoREST promoted by KBTBD4 mutation diverts epigenetic programmes inducing significant alterations in transcription to promote increased stemness of cancer cells. Transcriptional analysis of >200 human group 3 and 4 medulloblastomas by RNA-seq, highlights the presence of CoREST and stem-like signatures in tumours with KBTBD4 mutations, which extend to a further sub-set of non-mutant tumours, suggesting CoREST alterations as a novel pathogenetic mechanism of wide relevance in groups 3 and 4. Our findings uncover KBTBD4 mutation as a novel driver of epigenetic reprogramming in non-WNT/non-SHH medulloblastoma, establish a novel mode of tumorigenesis through gain-of-function mutations in ubiquitin ligases (neo-substrate recruitment) and identify both mutant KBTBD4 and CoREST complexes as new druggable targets for improved tumour-specific therapies.
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Affiliation(s)
- Zhuoyao Chen
- Centre for Medicines Discovery, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7DQ, UK
| | - Rafael M Ioris
- Cancer Research UK and Medical Research Council Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, OX3 7DQ, UK.
| | - Stacey Richardson
- Wolfson Childhood Cancer Research Centre, Newcastle University Centre for Cancer, Newcastle upon Tyne, NE1 7RU, UK
| | - Ava N Van Ess
- Cancer Research UK and Medical Research Council Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, OX3 7DQ, UK
| | - Iolanda Vendrell
- Centre for Medicines Discovery, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7DQ, UK
- Cancer Research UK and Medical Research Council Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, OX3 7DQ, UK
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7FZ, UK
| | - Benedikt M Kessler
- Centre for Medicines Discovery, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7DQ, UK
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7FZ, UK
| | - Francesca M Buffa
- Cancer Research UK and Medical Research Council Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, OX3 7DQ, UK
| | - Luca Busino
- Department of Cancer Biology and Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Steven C Clifford
- Wolfson Childhood Cancer Research Centre, Newcastle University Centre for Cancer, Newcastle upon Tyne, NE1 7RU, UK
| | - Alex N Bullock
- Centre for Medicines Discovery, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7DQ, UK.
| | - Vincenzo D'Angiolella
- Cancer Research UK and Medical Research Council Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, OX3 7DQ, UK.
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Minematsu H, Afify SM, Sugihara Y, Hassan G, Zahra MH, Seno A, Adachi M, Seno M. Cancer stem cells induced by chronic stimulation with prostaglandin E2 exhibited constitutively activated PI3K axis. Sci Rep 2022; 12:15628. [PMID: 36115905 PMCID: PMC9482612 DOI: 10.1038/s41598-022-19265-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 08/26/2022] [Indexed: 12/04/2022] Open
Abstract
Previously, our group has demonstrated establishment of Cancer Stem Cell (CSC) models from stem cells in the presence of conditioned medium of cancer cell lines. In this study, we tried to identify the factors responsible for the induction of CSCs. Since we found the lipid composition could be traced to arachidonic acid cascade in the CSC model, we assessed prostaglandin E2 (PGE2) as a candidate for the ability to induce CSCs from induced pluripotent stem cells (iPSCs). Mouse iPSCs acquired the characteristics of CSCs in the presence of 10 ng/mL of PGE2 after 4 weeks. Since constitutive Akt activation and pik3cg overexpression were found in the resultant CSCs, of which growth was found independent of PGE2, chronic stimulation of the receptors EP-2/4 by PGE2 was supposed to induce CSCs from iPSCs through epigenetic effect. The bioinformatics analysis of the next generation sequence data of the obtained CSCs proposed not only receptor tyrosine kinase activation by growth factors but also extracellular matrix and focal adhesion enhanced PI3K pathway. Collectively, chronic stimulation of stem cells with PGE2 was implied responsible for cancer initiation enhancing PI3K/Akt axis.
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8
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Sharma A, Sinha S, Keswani H, Shrivastava N. Kaempferol and Apigenin suppresses the stemness properties of TNBC cells by modulating Sirtuins. Mol Divers 2022; 26:3225-3240. [PMID: 35129762 DOI: 10.1007/s11030-022-10384-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 01/11/2022] [Indexed: 12/21/2022]
Abstract
Sirtuins (SIRTs) overexpression serves as a potential therapeutic target for TNBC because it is associated with bioactivities of cancer stem cells (CSCs), resistance to chemotherapy, and metastasis. Irrespective of the availability of synthetic SIRT inhibitors, new SIRT inhibitors with enhanced potency and lesser side effects serve as current unmet needs. Therefore, bioactive dietary compounds; kaempferol (KMP) and apigenin (API) were investigated for their anti-SIRTs potential. We observed KMP and API inhibits cellular proliferation by DNA damage and S-phase cell cycle arrest in TNBC Cells. They also suppress stemness properties in TNBCs as observed in experiments of mammosphere formation and clonogenic potential. Our mechanistic approach indicated that KMP and API inhibited SIRT3 and SIRT6 proteins, as evidenced by our in silico and in vitro experiment. Collectively, our studies suggest that KMP and API are promising candidates to be further developed as sirtuin modulators against TNBCs.
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Affiliation(s)
- Abhilasha Sharma
- B. V. Patel Pharmaceutical Education and Research Development (PERD) Centre, Ahmedabad, Gujarat, India
- Department of Life Science, Gujarat University, Ahmedabad, Gujarat, India
| | - Sonam Sinha
- B. V. Patel Pharmaceutical Education and Research Development (PERD) Centre, Ahmedabad, Gujarat, India
- Kashiv Biosciences, FP 27/2,43, TP-86, BLOCK-B OPP. Apple Woods Township, SP Ring Road, 382210, Ahmedabad, Gujarat, India
| | - Harshita Keswani
- B. V. Patel Pharmaceutical Education and Research Development (PERD) Centre, Ahmedabad, Gujarat, India
- Department of Biotechnology and Biochemistry, St. Xavier's College, Ahmedabad, India
| | - Neeta Shrivastava
- B. V. Patel Pharmaceutical Education and Research Development (PERD) Centre, Ahmedabad, Gujarat, India.
- Shri B.V. Patel Education Trust, Ahmedabad, Gujarat, India.
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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.
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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.
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10
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Xiong L, Tan B, Lei X, Zhang B, Li W, Liu D, Xia T. SIRT6 through PI3K/Akt/mTOR signaling pathway to enhance radiosensitivity of non-Small cell lung cancer and inhibit tumor progression. IUBMB Life 2021; 73:1092-1102. [PMID: 34033225 DOI: 10.1002/iub.2511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 05/06/2021] [Accepted: 05/23/2021] [Indexed: 12/16/2022]
Abstract
To explore the effect and mechanism of SIRT6 on radiosensitivity and tumor progression of non-small cell lung cancer (NSCLC). qRT-PCR was performed to detect the expressions of SIRT6 in tumor tissues, adjacent normal tissues and NSCLC cell lines of patients with advanced NSCLC before and after radiotherapy. After overexpression or interference with SIRT6 expression in NSCLC cells, the cells were routinely cultured or transfected for 48 h followed by 4 Gy radiation for 24 h. Then, check the cell proliferation, migration, apoptosis and cell cycle by MTT, wound healing assay and flow cytometry, while detect the expression of PI3K/Akt/mTOR signaling pathway-related proteins by Western blot. In addition, the effect of SIRT6 expression on NSCLC tumor growth was analyzed by xenograft tumor assay. SIRT6 showed a low expression in NSCLC tumor tissues and cell lines, while SIRT6 was significantly increased in NSCLC tissues after radiation treatment. Overexpression of SIRT6 in A549 and NCI-H23 cells inhibited cell proliferation viability, migration ability and promoted apoptosis. By comparison, after radiation treatment, NSCLC cells with high SIRT6 expression had lower ability of proliferation and migration and higher apoptosis rate. Overexpression of SIRT6 evidently down-regulated the activity of PI3K/Akt/mTOR signaling pathway in NSCLC cells before and after radiation. In addition, H2009 cells exhibited opposite cellular functions after interference with SIRT6 expression. In vivo experiments showed that overexpression of SIRT6 promoted the inhibitory effect of radiation on the growth of NSCLC xenograft tumors in nude mice. SIRT6 can promote the radiosensitivity of NSCLC and inhibit the development of tumor by down-regulating the activity of PI3K/Akt/mTOR signaling pathway.
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Affiliation(s)
- Lianggeng Xiong
- Department of Oncology, People's Hospital of Chongqing Banan District, Chongqing, China
| | - Binxin Tan
- Department of Oncology, People's Hospital of Chongqing Banan District, Chongqing, China
| | - Xiubing Lei
- Department of Oncology, People's Hospital of Chongqing Banan District, Chongqing, China
| | - Biao Zhang
- Department of Oncology, People's Hospital of Chongqing Banan District, Chongqing, China
| | - Wenting Li
- Department of Oncology, People's Hospital of Chongqing Banan District, Chongqing, China
| | - Daimei Liu
- Department of Oncology, People's Hospital of Chongqing Banan District, Chongqing, China
| | - Tian Xia
- Department of Oncology, People's Hospital of Chongqing Banan District, Chongqing, China
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11
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Wang H, Li J, Huang R, Fang L, Yu S. SIRT4 and SIRT6 Serve as Novel Prognostic Biomarkers With Competitive Functions in Serous Ovarian Cancer. Front Genet 2021; 12:666630. [PMID: 34335684 PMCID: PMC8320514 DOI: 10.3389/fgene.2021.666630] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 06/15/2021] [Indexed: 12/20/2022] Open
Abstract
Sirtuins (SIRTs) are class III histone deacetylases (HDACs) that include seven members and are widely expressed in mammals. Accumulating evidence shows that sirtuins may have contradictory roles in various malignancies. They mainly participate in metabolic homeostasis, DNA damage repair, cell survival, and differentiation, as well as other cancer-related biological processes. To better understand their prognostic role and biological functions, we used comprehensive bioinformatic analyses to demonstrate the expression and mutation of sirtuin family member genes in ovarian cancer (OC), with a detailed focus on prognostic prediction, including the effectiveness of anti-OC drugs. Furthermore, the co-expression genes of SIRT4 and SIRT6 with contradictory survival prediction values in both overall and progression-free survival (PFS) times were further analyzed through Gene Ontology enrichment and Kyoto Encyclopedia annotation. Additionally, we performed and obtained the immunohistochemical staining patterns of these two biomarkers from the serous OC patient database and clinical patient samples to demonstrate their potential applicability in clinical pathology. According to our findings, SIRT4 and SIRT6 are novel prognostic biomarkers that may serve as contradictory competitors for OC cell survival. They are also sensitive biomarkers for the prediction of Avastin's anticancer effect. While SIRT4 is related to the immune response during oocyte maturation, SIRT6 participates in immune-related disease pathways and mitochondrial metabolism-mediated DNA translation. These findings contribute to the novel hypothesis that SIRT4 and SIRT6 act as contradictory competitors in the regulation of OC behavior. Further studies are required to validate our hypothesis.
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Affiliation(s)
- Huihuan Wang
- Department of Computer Science, School of Basic Medicine, Harbin Medical University, Harbin, China
| | - Juan Li
- Department of Pathology, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Rui Huang
- Department of Colorectal Surgery, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Lei Fang
- Department of Gynecology, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Shan Yu
- Department of Pathology, Second Affiliated Hospital of Harbin Medical University, Harbin, China
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12
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Liu T, Li Z, Tian F. Quercetin inhibited the proliferation and invasion of hepatoblastoma cells through facilitating SIRT6-medicated FZD4 silence. Hum Exp Toxicol 2021; 40:S96-S107. [PMID: 34219513 DOI: 10.1177/09603271211030558] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Hepatoblastoma (HB) is a malignant liver tumor that occurs during childhood. The histone deacetylase SIRT6 functions as a tumor suppressor in diverse cancers. Quercetin, as activators and antioxidants of sirtuins, exhibits remarkable anticancer activity in many tumors. However, whether quercetin ameliorates HB is still unclear. In our study, we found that SIRT6 was downregulated in HB tissues and cell lines. Overexpression of SIRT6 observably suppressed cell proliferation and invasion, promoted cell apoptosis. Mechanistically, SIRT6 suppressed frizzled 4 (FZD4) transcription by deacetylating histone H3K9. Upregulation of SIRT6 reduced the protein levels of FZD4 and H3K9ac. Additionally, quercetin treatment could enhance the expression of SIRT6, repress FZD4 level, cell viability and invasion, and promote apoptosis. Overexpression of FZD4 signally reversed quercetin-treated the promotion effect on cell apoptosis, and the inhibition effects on FZD4 expression, cell viability, invasion and Wnt/β-catenin pathway related proteins. In addition, LiCl, an agonist of Wnt/β-catenin pathway, could recover the inhibition effects of quercetin on Wnt/β-catenin pathway related proteins, cell viability and invasion, and promotion effect on cell apoptosis. In vivo mouse xenograft tumor growth assay revealed that quercetin markedly suppressed tumor growth. In conclusion, these results demonstrated that the molecular mechanism of quercetin suppressing HB cell proliferation and invasion, promoting apoptosis was to promote the deacetylation of SIRT6 on FZD4 and inhibit the activation of Wnt/β-catenin pathway.
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Affiliation(s)
- T Liu
- The Second Ward of General Surgery Department, Xi'an Children's Hospital, Xi'an, People's Republic of China
| | - Z Li
- The Second Ward of General Surgery Department, Xi'an Children's Hospital, Xi'an, People's Republic of China
| | - F Tian
- The Second Ward of General Surgery Department, Xi'an Children's Hospital, Xi'an, People's Republic of China
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13
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Zhu C, Li K, Jiang M, Chen S. RBM5-AS1 promotes radioresistance in medulloblastoma through stabilization of SIRT6 protein. Acta Neuropathol Commun 2021; 9:123. [PMID: 34225779 PMCID: PMC8256544 DOI: 10.1186/s40478-021-01218-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 06/16/2021] [Indexed: 12/29/2022] Open
Abstract
Cancer stem cells (CSCs) contribute to radioresistance in medulloblastoma. Thus, identification of key regulators of medulloblastoma stemness is critical for improving radiotherapy for medulloblastoma. In the present study, we profiled CSC-related long non-coding RNAs (lncRNAs) between radioresistant and parental medulloblastoma cells. The roles of the lncRNA RBM5-AS1 in the stemness and radiosensitivity of medulloblastoma cells were investigated. We found that RBM5-AS1, a novel inducer of medulloblastoma stemness, was significantly upregulated in radioresistant medulloblastoma cells compared to parental cells. Knockdown of RBM5-AS1 diminished the viability and clonogenic survival of both radioresistant and parental medulloblastoma cells after radiation. Silencing of RBM5-AS1 significantly enhanced radiation-induced apoptosis and DNA damage. In vivo studies confirmed that depletion of RBM5-AS1 inhibited tumor growth and increased radiosensitivity in a medulloblastoma xenograft model. In contrast, overexpression of RBM5-AS1 reduced radiation-induced apoptosis and DNA damage in medulloblastoma cells. Mechanistically, RBM5-AS1 interacted with and stabilized sirtuin 6 (SIRT6) protein. Silencing of SIRT6 reduced the stemness and reinforced radiation-induced DNA damage in medulloblastoma cells. Overexpression of SIRT6 rescued medulloblastoma cells from RBM5-AS1 depletion-induced radiosensitization and DNA damage. Overall, we identify RBM5-AS1 as an inducer of stemness and radioresistance in medulloblastoma. Targeting RBM5-AS1 may represent a potential strategy to overcome the resistance to radiotherapy in this malignancy.
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14
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Liu M, Yu J, Jin H, Wang S, Ding J, Xing H, He S, Zeng Y. Bioinformatics Analysis of the SIRT Family Members and Assessment of Their Potential Clinical Value. Onco Targets Ther 2021; 14:2635-2649. [PMID: 33883907 PMCID: PMC8055293 DOI: 10.2147/ott.s298616] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 03/11/2021] [Indexed: 12/24/2022] Open
Abstract
Background Hepatocellular carcinoma (HCC) is a highly malignant and common tumor. Many biomarkers have been identified for HCC. However, the available ones are not accurate enough in term of prognostic value and new markers are needed for the prognosis of this disease. Sirtuins are NAD(+)-dependent histone deacetylases involved in many biological processes of cancers, consisting of family members SIRT1-SIRT7. However, the prognostic value of the SIRTs in HCC remains largely unknown. Methods Differential expression of SIRTs and survival analysis were assessed in patients with HCC using Oncomine and UALCAN databases. Gene set enrichment analysis (GSEA) was used for pathway analysis. Metascape software was used to construct gene ontologies, metabolic pathways and protein-protein interaction networks. Moreover, a HCC murine model was used to validate the expression levels of SIRT3/6/7 expression. Results Differential expression analysis suggested that SIRT2-7, not SIRT1, were expressed at higher levels in HCC tissues compared to adjacent normal tissues. These SIRTs showed some similarities, as revealed by GO and KEGG pathway. Higher SIRT3/6/7 mRNA expression levels were found to be significantly associated with shorter overall survival (OS) in HCC patients. Both SIRT3/6/7 mRNA and protein levels were highly expressed in HCC. In addition, over-expression of SIRT3/6/7 was associated with tumor stage and grade in HCC patients. Univariate analysis showed that SIRT 6/7 expressions were linked to a shorter OS of HCC patients. Multivariate analysis showed that SIRT7 levels were independently associated with a significantly shorter OS in HCC patients. Conclusion Differentially expressed SIRT3/6/7 were significantly associated with tumor stage, grade and OS in HCC patients. In addition, SIRT7 were independently associated with a significantly shorter OS in HCC patients. Thus, SIRT3/6/7 can be used as prognostic biomarkers to predict the survival of HCC patients.
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Affiliation(s)
- Mingjiang Liu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, Guangxi, People's Republic of China
| | - Jingjing Yu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, Guangxi, People's Republic of China
| | - Hu Jin
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, Guangxi, People's Republic of China
| | - Sifan Wang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, Guangxi, People's Republic of China
| | - Jin Ding
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, Guangxi, People's Republic of China
| | - Hao Xing
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, Guangxi, People's Republic of China
| | - Songqing He
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, Guangxi, People's Republic of China
| | - Yonglian Zeng
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, Guangxi, People's Republic of China
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15
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FKBP10 Regulates Protein Translation to Sustain Lung Cancer Growth. Cell Rep 2021; 30:3851-3863.e6. [PMID: 32187554 DOI: 10.1016/j.celrep.2020.02.082] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 10/29/2019] [Accepted: 02/20/2020] [Indexed: 12/13/2022] Open
Abstract
Cancer therapy is limited, in part, by lack of specificity. Thus, identifying molecules that are selectively expressed by, and relevant for, cancer cells is of paramount medical importance. Here, we show that peptidyl-prolyl-cis-trans-isomerase (PPIase) FK506-binding protein 10 (FKBP10)-positive cells are present in cancer lesions but absent in the healthy parenchyma of human lung. FKBP10 expression negatively correlates with survival of lung cancer patients, and its downregulation causes a dramatic diminution of lung tumor burden in mice. Mechanistically, our results from gain- and loss-of-function assays show that FKBP10 boosts cancer growth and stemness via its PPIase activity. Also, FKBP10 interacts with ribosomes, and its downregulation leads to reduction of translation elongation at the beginning of open reading frames (ORFs), particularly upon insertion of proline residues. Thus, our data unveil FKBP10 as a cancer-selective molecule with a key role in translational reprogramming, stem-like traits, and growth of lung cancer.
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16
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Becherini P, Caffa I, Piacente F, Damonte P, Vellone VG, Passalacqua M, Benzi A, Bonfiglio T, Reverberi D, Khalifa A, Ghanem M, Guijarro A, Tagliafico L, Sucameli M, Persia A, Monacelli F, Cea M, Bruzzone S, Ravera S, Nencioni A. SIRT6 enhances oxidative phosphorylation in breast cancer and promotes mammary tumorigenesis in mice. Cancer Metab 2021; 9:6. [PMID: 33482921 PMCID: PMC7821730 DOI: 10.1186/s40170-021-00240-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 01/05/2021] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Sirtuin 6 (SIRT6) is a NAD+-dependent deacetylase with key roles in cell metabolism. High SIRT6 expression is associated with adverse prognosis in breast cancer (BC) patients. However, the mechanisms through which SIRT6 exerts its pro-oncogenic effects in BC remain unclear. Here, we sought to define the role of SIRT6 in BC cell metabolism and in mouse polyoma middle T antigen (PyMT)-driven mammary tumors. METHODS We evaluated the effect of a heterozygous deletion of Sirt6 on tumor latency and survival of mouse mammary tumor virus (MMTV)-PyMT mice. The effect of SIRT6 silencing on human BC cell growth was assessed in MDA-MB-231 xenografts. We also analyzed the effect of Sirt6 heterozygous deletion, of SIRT6 silencing, and of the overexpression of either wild-type (WT) or catalytically inactive (H133Y) SIRT6 on BC cell pyruvate dehydrogenase (PDH) expression and activity and oxidative phosphorylation (OXPHOS), including respiratory complex activity, ATP/AMP ratio, AMPK activation, and intracellular calcium concentration. RESULTS The heterozygous Sirt6 deletion extended tumor latency and mouse survival in the MMTV-PyMT mouse BC model, while SIRT6 silencing slowed the growth of MDA-MB-231 BC cell xenografts. WT, but not catalytically inactive, SIRT6 enhanced PDH expression and activity, OXPHOS, and ATP/AMP ratio in MDA-MB-231 and MCF7 BC cells. Opposite effects were obtained by SIRT6 silencing, which also blunted the expression of genes encoding for respiratory chain proteins, such as UQCRFS1, COX5B, NDUFB8, and UQCRC2, and increased AMPK activation in BC cells. In addition, SIRT6 overexpression increased, while SIRT6 silencing reduced, intracellular calcium concentration in MDA-MB-231 cells. Consistent with these findings, the heterozygous Sirt6 deletion reduced the expression of OXPHOS-related genes, the activity of respiratory complexes, and the ATP/AMP ratio in tumors isolated from MMTV-PyMT mice. CONCLUSIONS Via its enzymatic activity, SIRT6 enhances PDH expression and activity, OXPHOS, ATP/AMP ratio, and intracellular calcium concentration, while reducing AMPK activation, in BC cells. Thus, overall, SIRT6 inhibition appears as a viable strategy for preventing or treating BC.
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Affiliation(s)
- Pamela Becherini
- Department of Internal Medicine and Medical Specialties (DIMI), University of Genoa, V.le Benedetto XV 6, 16132, Genoa, Italy.,Ospedale Policlinico San Martino IRCCS, Largo Rosanna Benzi 10, 16132, Genoa, Italy
| | - Irene Caffa
- Department of Internal Medicine and Medical Specialties (DIMI), University of Genoa, V.le Benedetto XV 6, 16132, Genoa, Italy.,Ospedale Policlinico San Martino IRCCS, Largo Rosanna Benzi 10, 16132, Genoa, Italy
| | - Francesco Piacente
- Department of Internal Medicine and Medical Specialties (DIMI), University of Genoa, V.le Benedetto XV 6, 16132, Genoa, Italy.,Ospedale Policlinico San Martino IRCCS, Largo Rosanna Benzi 10, 16132, Genoa, Italy.,Department of Experimental Medicine (DIMES), University of Genoa, V.le Benedetto XV 1, 16132, Genoa, Italy
| | - Patrizia Damonte
- Department of Internal Medicine and Medical Specialties (DIMI), University of Genoa, V.le Benedetto XV 6, 16132, Genoa, Italy
| | - Valerio G Vellone
- Ospedale Policlinico San Martino IRCCS, Largo Rosanna Benzi 10, 16132, Genoa, Italy.,Department of Integrated, Surgical and Diagnostic Sciences (DISC), University of Genoa, L.go Rosanna Benzi 8, 16132, Genoa, Italy
| | - Mario Passalacqua
- Department of Experimental Medicine (DIMES), University of Genoa, V.le Benedetto XV 1, 16132, Genoa, Italy
| | - Andrea Benzi
- Department of Experimental Medicine (DIMES), University of Genoa, V.le Benedetto XV 1, 16132, Genoa, Italy
| | - Tommaso Bonfiglio
- Department of Internal Medicine and Medical Specialties (DIMI), University of Genoa, V.le Benedetto XV 6, 16132, Genoa, Italy
| | - Daniele Reverberi
- Ospedale Policlinico San Martino IRCCS, Largo Rosanna Benzi 10, 16132, Genoa, Italy
| | - Amr Khalifa
- Department of Internal Medicine and Medical Specialties (DIMI), University of Genoa, V.le Benedetto XV 6, 16132, Genoa, Italy
| | - Moustafa Ghanem
- Department of Internal Medicine and Medical Specialties (DIMI), University of Genoa, V.le Benedetto XV 6, 16132, Genoa, Italy
| | - Ana Guijarro
- Ospedale Policlinico San Martino IRCCS, Largo Rosanna Benzi 10, 16132, Genoa, Italy
| | - Luca Tagliafico
- Department of Internal Medicine and Medical Specialties (DIMI), University of Genoa, V.le Benedetto XV 6, 16132, Genoa, Italy
| | - Marzia Sucameli
- Department of Internal Medicine and Medical Specialties (DIMI), University of Genoa, V.le Benedetto XV 6, 16132, Genoa, Italy
| | - Angelica Persia
- Department of Internal Medicine and Medical Specialties (DIMI), University of Genoa, V.le Benedetto XV 6, 16132, Genoa, Italy
| | - Fiammetta Monacelli
- Department of Internal Medicine and Medical Specialties (DIMI), University of Genoa, V.le Benedetto XV 6, 16132, Genoa, Italy.,Ospedale Policlinico San Martino IRCCS, Largo Rosanna Benzi 10, 16132, Genoa, Italy
| | - Michele Cea
- Department of Internal Medicine and Medical Specialties (DIMI), University of Genoa, V.le Benedetto XV 6, 16132, Genoa, Italy.,Ospedale Policlinico San Martino IRCCS, Largo Rosanna Benzi 10, 16132, Genoa, Italy
| | - Santina Bruzzone
- Department of Experimental Medicine (DIMES), University of Genoa, V.le Benedetto XV 1, 16132, Genoa, Italy
| | - Silvia Ravera
- Department of Experimental Medicine (DIMES), University of Genoa, V.le Benedetto XV 1, 16132, Genoa, Italy.
| | - Alessio Nencioni
- Department of Internal Medicine and Medical Specialties (DIMI), University of Genoa, V.le Benedetto XV 6, 16132, Genoa, Italy. .,Ospedale Policlinico San Martino IRCCS, Largo Rosanna Benzi 10, 16132, Genoa, Italy.
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17
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Chen F, Ma X, Liu Y, Ma D, Gao X, Qian X. SIRT6 inhibits metastasis by suppressing SNAIL expression in nasopharyngeal carcinoma cells. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2021; 14:63-74. [PMID: 33532024 PMCID: PMC7847487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 11/30/2020] [Indexed: 06/12/2023]
Abstract
Nasopharyngeal carcinoma (NPC) is a head and neck cancer with severe local invasion and early distant metastasis. SIRT6 serves as a critical modulator of the development and metastasis of multiple types of cancer; however, the roles and underlying mechanisms of SIRT6 in regulating NPC metastasis remain largely unknown. Here, the expression of SIRT6 in high metastatic 5-8F cells and low metastatic 6-10B cells was analyzed. SIRT6 expression was found to be negatively associated with the metastatic capability of NPC cells. Moreover, we identified that SIRT6 inhibited NPC cell metastasis through suppression of SNAIL expression. Mechanistically, we demonstrated that SIRT6 interacted with transcription factor p65 (NF-kB subunit) and deacetylated histone H3 lysine 9 (H3K9) and lysine 56 (H3K56) at the promoter of SNAIL, leading to reduced transcription of SNAIL. In summary, SIRT6 functions as a metastasis suppressor in NPC cells through epigenetic regulation of SNAIL gene expression.
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Affiliation(s)
- Feng Chen
- Department of Otorhinolaryngology-Head and Neck Surgery, Nanjing Drum Tower Hospital, Clinical College of Nanjing Medical UniversityChina
- Department of Otorhinolaryngology-Head and Neck Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Jiangsu Provincial Key Medical Discipline (Laboratory)China
- Research Institution of OtorhinolaryngologyNanjing 210008, Jiangsu, China
| | - Xiaofeng Ma
- Department of Otorhinolaryngology-Head and Neck Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Jiangsu Provincial Key Medical Discipline (Laboratory)China
- Research Institution of OtorhinolaryngologyNanjing 210008, Jiangsu, China
| | - Yongze Liu
- Department of Otorhinolaryngology-Head and Neck Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Jiangsu Provincial Key Medical Discipline (Laboratory)China
- Research Institution of OtorhinolaryngologyNanjing 210008, Jiangsu, China
| | - Dengbin Ma
- Department of Otorhinolaryngology-Head and Neck Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Jiangsu Provincial Key Medical Discipline (Laboratory)China
- Research Institution of OtorhinolaryngologyNanjing 210008, Jiangsu, China
| | - Xia Gao
- Department of Otorhinolaryngology-Head and Neck Surgery, Nanjing Drum Tower Hospital, Clinical College of Nanjing Medical UniversityChina
- Department of Otorhinolaryngology-Head and Neck Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Jiangsu Provincial Key Medical Discipline (Laboratory)China
- Research Institution of OtorhinolaryngologyNanjing 210008, Jiangsu, China
| | - Xiaoyun Qian
- Department of Otorhinolaryngology-Head and Neck Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Jiangsu Provincial Key Medical Discipline (Laboratory)China
- Research Institution of OtorhinolaryngologyNanjing 210008, Jiangsu, China
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Aventaggiato M, Vernucci E, Barreca F, Russo MA, Tafani M. Sirtuins' control of autophagy and mitophagy in cancer. Pharmacol Ther 2020; 221:107748. [PMID: 33245993 DOI: 10.1016/j.pharmthera.2020.107748] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/10/2020] [Indexed: 02/06/2023]
Abstract
Mammalian cells use a specialized and complex machinery for the removal of altered proteins or dysfunctional organelles. Such machinery is part of a mechanism called autophagy. Moreover, when autophagy is specifically employed for the removal of dysfunctional mitochondria, it is called mitophagy. Autophagy and mitophagy have important physiological implications and roles associated with cellular differentiation, resistance to stresses such as starvation, metabolic control and adaptation to the changing microenvironment. Unfortunately, transformed cancer cells often exploit autophagy and mitophagy for sustaining their metabolic reprogramming and growth to a point that autophagy and mitophagy are recognized as promising targets for ongoing and future antitumoral therapies. Sirtuins are NAD+ dependent deacylases with a fundamental role in sensing and modulating cellular response to external stresses such as nutrients availability and therefore involved in aging, oxidative stress control, inflammation, differentiation and cancer. It is clear, therefore, that autophagy, mitophagy and sirtuins share many common aspects to a point that, recently, sirtuins have been linked to the control of autophagy and mitophagy. In the context of cancer, such a control is obtained by modulating transcription of autophagy and mitophagy genes, by post translational modification of proteins belonging to the autophagy and mitophagy machinery, by controlling ROS production or major metabolic pathways such as Krebs cycle or glutamine metabolism. The present review details current knowledge on the role of sirtuins, autophagy and mitophagy in cancer to then proceed to discuss how sirtuins can control autophagy and mitophagy in cancer cells. Finally, we discuss sirtuins role in the context of tumor progression and metastasis indicating glutamine metabolism as an example of how a concerted activation and/or inhibition of sirtuins in cancer cells can control autophagy and mitophagy by impinging on the metabolism of this fundamental amino acid.
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Affiliation(s)
- Michele Aventaggiato
- Department of Experimental Medicine, Sapienza University, Viale Regina Elena 324, 00161 Rome, Italy
| | - Enza Vernucci
- Department of Internistic, Anesthesiologic and Cardiovascular Clinical Sciences, Italy; MEBIC Consortium, San Raffaele Open University, Via val Cannuta 247, 00166 Rome, Italy
| | - Federica Barreca
- Department of Experimental Medicine, Sapienza University, Viale Regina Elena 324, 00161 Rome, Italy
| | - Matteo A Russo
- MEBIC Consortium, San Raffaele Open University, Via val Cannuta 247, 00166 Rome, Italy; IRCCS San Raffaele, Via val Cannuta 247, 00166 Rome, Italy
| | - Marco Tafani
- Department of Experimental Medicine, Sapienza University, Viale Regina Elena 324, 00161 Rome, Italy.
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Hassan G, Du J, Afify SM, Seno A, Seno M. Cancer stem cell generation by silenced MAPK enhancing PI3K/AKT signaling. Med Hypotheses 2020; 141:109742. [DOI: 10.1016/j.mehy.2020.109742] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 04/13/2020] [Indexed: 12/17/2022]
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20
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Karaman Mayack B, Sippl W, Ntie-Kang F. Natural Products as Modulators of Sirtuins. Molecules 2020; 25:molecules25143287. [PMID: 32698385 PMCID: PMC7397027 DOI: 10.3390/molecules25143287] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 07/12/2020] [Accepted: 07/15/2020] [Indexed: 02/07/2023] Open
Abstract
Natural products have been used for the treatment of human diseases since ancient history. Over time, due to the lack of precise tools and techniques for the separation, purification, and structural elucidation of active constituents in natural resources there has been a decline in financial support and efforts in characterization of natural products. Advances in the design of chemical compounds and the understanding of their functions is of pharmacological importance for the biomedical field. However, natural products regained attention as sources of novel drug candidates upon recent developments and progress in technology. Natural compounds were shown to bear an inherent ability to bind to biomacromolecules and cover an unparalleled chemical space in comparison to most libraries used for high-throughput screening. Thus, natural products hold a great potential for the drug discovery of new scaffolds for therapeutic targets such as sirtuins. Sirtuins are Class III histone deacetylases that have been linked to many diseases such as Parkinson`s disease, Alzheimer’s disease, type II diabetes, and cancer linked to aging. In this review, we examine the revitalization of interest in natural products for drug discovery and discuss natural product modulators of sirtuins that could serve as a starting point for the development of isoform selective and highly potent drug-like compounds, as well as the potential application of naturally occurring sirtuin inhibitors in human health and those in clinical trials.
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Affiliation(s)
- Berin Karaman Mayack
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Istanbul University, Istanbul 34116, Turkey
- Correspondence:
| | - Wolfgang Sippl
- Institute of Pharmacy, Martin-Luther University of Halle-Wittenberg, Kurt-Mothes-Str. 3, 06120 Halle (Saale), Germany; (W.S.); (F.N.-K.)
| | - Fidele Ntie-Kang
- Institute of Pharmacy, Martin-Luther University of Halle-Wittenberg, Kurt-Mothes-Str. 3, 06120 Halle (Saale), Germany; (W.S.); (F.N.-K.)
- Department of Chemistry, University of Buea, P.O. Box 63, Buea CM-00237, Cameroon
- Institute of Botany, Technical University of Dresden, 01217 Dresden, Germany
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21
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Expression of SIRT1, SIRT3 and SIRT6 Genes for Predicting Survival in Triple-Negative and Hormone Receptor-Positive Subtypes of Breast Cancer. Pathol Oncol Res 2020; 26:2723-2731. [PMID: 32681437 DOI: 10.1007/s12253-020-00873-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 07/09/2020] [Indexed: 12/13/2022]
Abstract
Triple-negative breast cancer (TNBC) is characterized by aggressive phenotype and a poorer prognosis compared to the estrogen and progesterone receptor positive, Her2 negative (ER + PR + Her2-) breast cancer. Increasing evidence suggests that sirtuins, a family of histone deacetylases, could have an important role in aggressiveness of TNBC's. The current study evaluated the potential clinical relevance of SIRT1, SIRT3 and SIRT6 gene expressions in two prognostically distinctive subtypes of breast cancer, the most aggressive TNBC and the least aggressive ER + PR + Her2- tumors. Total RNAs were isolated from 48 TNBC and 63 ER + PR + Her2- tumor samples. Relative gene expression was determined by SYBR Green RT-PCR and delta-delta Ct method, normalized to GAPDH. Mean gene expression of both SIRT1 and SIRT3 was significantly lower in the TNBC compared to ER + PR + Her2- tumors (p = 0.0001). Low SIRT1 and SIRT6 expressions associated with worse overall survival in ER + PR + Her2- patients (p = 0.039, p = 0.006, respectively), while TNBC patients with high SIRT1 tend to have a poor prognosis (p = 0.057). In contrast, high expression of SIRT3 in TNBC patients associated with higher histological grade (p = 0.027) and worse overall survival (p = 0.039). The Cox regression analysis revealed that low SIRT1 expression could be an independent prognostic marker of poor survival in ER + PR + Her2- breast cancers (HR = 11.765, 95% CI:1.234-100, p = 0.033). Observed differential expression of SIRT1, SIRT3 and SIRT6 genes in TNBC and ER + PR + Her2- subtypes, with opposite effects on patients' survival, suggests context-dependent mechanisms underlying aggressiveness of breast cancer. Further investigations are necessary to evaluate sirtuins as potential biomarkers and therapeutic targets in breast cancer.
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Yin H, Wang L, Li F, Wang D, Zhang Z, Yu B, Liu Y. ET-1 promotes the growth and metastasis of esophageal squamous cell carcinoma via activating PI3K/Akt pathway. Transl Cancer Res 2020; 9:3282-3292. [PMID: 35117695 PMCID: PMC8799244 DOI: 10.21037/tcr.2020.04.26] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 02/08/2020] [Indexed: 11/06/2022]
Abstract
BACKGROUND Esophageal squamous cell carcinoma (ESCC) is one of the prevalent and deadly cancers worldwide. Previous studies confirmed that endothelin-1 (ET-1) serves as an oncogene and therapeutic target in various tumors. However, the role and mechanism of ET-1 in the progression of ESCC remains largely unclear. METHODS Reverse transcription-quantitative polymerase chain reaction (RT-qPCR) was used to detect the mRNA level of ET-1 in ESCC tissues and cell lines. Cell counting kit-8 (CCK-8), flow cytometry and Transwell assay were performed to examine the proliferation, cell cycle arrest, invasion and migration capacity of ESCC cells. Western blot was applied to measure the expression of ET-1 and PI3K/Akt pathway-related proteins. Furthermore, we also assessed the effect of ET-1 on tumor growth in vivo. RESULTS ET-1 was highly expressed in ESCC tissues and associated with poor outcomes. Knockdown of ET-1 significantly inhibited the proliferation, migration and invasion capacity of ESCC cells and promoted cell cycle arrest. Mechanistically, silencing of ET-1 exerts anti-proliferation and anti-metastasis activities via inactivation of the PI3K/Akt signaling pathway in ESCC in vitro and in vivo. CONCLUSIONS These findings uncover the effective suppression of cell proliferation and metastasis through silencing of ET-1 and blocking the PI3K/Akt signaling pathway, which is an attractive therapeutic regimen for the treatment of ESCC.
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Affiliation(s)
- Hui Yin
- Department of Thoracic Surgery, The First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Lunqing Wang
- Department of Thoracic Surgery, Qingdao Municipal Hospital, Qingdao 266011, China
| | - Fei Li
- Department of Thoracic Surgery, Qingdao Municipal Hospital, Qingdao 266011, China
| | - Dongfei Wang
- Department of Thoracic Surgery, Qingdao Municipal Hospital, Qingdao 266011, China
| | - Zhe Zhang
- Department of Thoracic Surgery, Qingdao Municipal Hospital, Qingdao 266011, China
| | - Bentong Yu
- Department of Thoracic Surgery, The First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Yange Liu
- School of Basic Medical Sciences, Nanchang University, Nanchang 330031, China
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Ravi V, Jain A, Khan D, Ahamed F, Mishra S, Giri M, Inbaraj M, Krishna S, Sarikhani M, Maity S, Kumar S, Shah RA, Dave P, Pandit AS, Rajendran R, Desingu PA, Varshney U, Das S, Kolthur-Seetharam U, Rajakumari S, Singh M, Sundaresan NR. SIRT6 transcriptionally regulates global protein synthesis through transcription factor Sp1 independent of its deacetylase activity. Nucleic Acids Res 2019; 47:9115-9131. [PMID: 31372634 PMCID: PMC6755095 DOI: 10.1093/nar/gkz648] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 06/30/2019] [Accepted: 07/31/2019] [Indexed: 01/12/2023] Open
Abstract
Global protein synthesis is emerging as an important player in the context of aging and age-related diseases. However, the intricate molecular networks that regulate protein synthesis are poorly understood. Here, we report that SIRT6, a nuclear-localized histone deacetylase represses global protein synthesis by transcriptionally regulating mTOR signalling via the transcription factor Sp1, independent of its deacetylase activity. Our results suggest that SIRT6 deficiency increases protein synthesis in mice. Further, multiple lines of in vitro evidence suggest that SIRT6 negatively regulates protein synthesis in a cell-autonomous fashion and independent of its catalytic activity. Mechanistically, SIRT6 binds to the zinc finger DNA binding domain of Sp1 and represses its activity. SIRT6 deficiency increased the occupancy of Sp1 at key mTOR signalling gene promoters resulting in enhanced expression of these genes and activation of the mTOR signalling pathway. Interestingly, inhibition of either mTOR or Sp1 abrogated the increased protein synthesis observed under SIRT6 deficient conditions. Moreover, pharmacological inhibition of mTOR restored cardiac function in muscle-specific SIRT6 knockout mice, which spontaneously develop cardiac hypertrophy. Overall, these findings have unravelled a new layer of regulation of global protein synthesis by SIRT6, which can be potentially targeted to combat aging-associated diseases like cardiac hypertrophy.
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Affiliation(s)
- Venkatraman Ravi
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Aditi Jain
- Centre for BioSystems Science and Engineering, Indian Institute of Science, Bengaluru, India
| | - Danish Khan
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Faiz Ahamed
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Sneha Mishra
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Malyasree Giri
- Molecular Biophysics Unit, Indian Institute of Science, Bengaluru, India
| | - Meena Inbaraj
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Swati Krishna
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Mohsen Sarikhani
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Sangeeta Maity
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Shweta Kumar
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Riyaz Ahmad Shah
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Pratik Dave
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Anwit S Pandit
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Rajprabu Rajendran
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bengaluru, India
| | - Perumal A Desingu
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Umesh Varshney
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | - Saumitra Das
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India
| | | | - Sona Rajakumari
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bengaluru, India
| | - Mahavir Singh
- Molecular Biophysics Unit, Indian Institute of Science, Bengaluru, India.,NMR Research Centre, Indian Institute of Science, Bengaluru, India
| | - Nagalingam R Sundaresan
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bengaluru, India.,Centre for BioSystems Science and Engineering, Indian Institute of Science, Bengaluru, India
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NQO1 potentiates apoptosis evasion and upregulates XIAP via inhibiting proteasome-mediated degradation SIRT6 in hepatocellular carcinoma. Cell Commun Signal 2019; 17:168. [PMID: 31842909 PMCID: PMC6915971 DOI: 10.1186/s12964-019-0491-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 11/26/2019] [Indexed: 12/11/2022] Open
Abstract
Background Our previous study has demonstrated that NAD(P)H: quinone oxidoreductase 1 (NQO1) is significantly upregulated in human liver cancer where it potentiates the apoptosis evasion of liver cancer cell. However, the underlying mechanisms of the oncogenic function of NQO1 in HCC have not been fully elucidated. Methods Expression of NQO1, SIRT6, AKT and X-linked inhibitor of apoptosis protein (XIAP) protein were measured by western blotting and immunohistochemistry. Additionally, the interaction between NQO1 and potential proteins were determined by immunoprecipitation assays. Furthermore, the effect of NQO1 and SIRT6 on tumor growth was determined in cell model and orthotopic tumor implantation model. Results We found that NQO1 overexpression in HCC enhanced SIRT6 protein stability via inhibiting ubiquitin-mediated 26S proteasome degradation. High level of SIRT6 reduced acetylation of AKT which resulted in increased phosphorylation and activity of AKT. Activated AKT subsequently phosphorylated anti-apoptotic protein XIAP at Ser87 which determined its protein stability. Reintroduction of SIRT6 or AKT efficiently rescued NQO1 knock-out-mediated inhibition of growth and induction of apoptosis. In orthotopic mouse model, NQO1 knock-out inhibited tumor growth and induced apoptosis while this effect was effectively rescued by SIRT6 overexpression or MG132 treatment partially. Conclusions Collectively, these results reveal an oncogenic function of NQO1 in sustaining HCC cell proliferation through SIRT6/AKT/XIAP signaling pathway.
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25
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Zhu S, Dong Z, Ke X, Hou J, Zhao E, Zhang K, Wang F, Yang L, Xiang Z, Cui H. The roles of sirtuins family in cell metabolism during tumor development. Semin Cancer Biol 2019; 57:59-71. [DOI: 10.1016/j.semcancer.2018.11.003] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 11/11/2018] [Accepted: 11/14/2018] [Indexed: 12/20/2022]
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26
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Ma XL, Sun YF, Wang BL, Shen MN, Zhou Y, Chen JW, Hu B, Gong ZJ, Zhang X, Cao Y, Pan BS, Zhou J, Fan J, Guo W, Yang XR. Sphere-forming culture enriches liver cancer stem cells and reveals Stearoyl-CoA desaturase 1 as a potential therapeutic target. BMC Cancer 2019; 19:760. [PMID: 31370822 PMCID: PMC6676608 DOI: 10.1186/s12885-019-5963-z] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 07/19/2019] [Indexed: 01/15/2023] Open
Abstract
BACKGROUNDS The role of sphere-forming culture in enriching subpopulations with stem-cell properties in hepatocellular carcinoma (HCC) is unclear. The present study investigates its value in enriching cancer stem cells (CSCs) subpopulations and the mechanism by which HCC CSCs are maintained. METHODS HCC cell lines and fresh primary tumor cells were cultured in serum-free and ultra-low attachment conditions to allow formation of HCC spheres. In vitro and in vivo experiments were performed to evaluate CSC characteristics. Expression levels of CSC-related genes were assessed by qRT-PCR and the correlation between sphere formation and clinical characteristics was investigated. Finally, gene expression profiling was performed to explore the molecular mechanism underlying HCC CSC maintenance. RESULTS We found that both cell lines and primary tumor cells formed spheres. HCC spheres possessed the capacity for self-renewal, proliferation, drug resistance, and contained different subpopulations of CSCs. Of interest, 500 sphere-forming Huh7 cells or 200 primary tumor cells could generate tumors in immunodeficient animals. Sphere formation correlated with size, multiple tumors, satellite lesions, and advanced stage. Further investigation identified that the PPARα-SCD1 axis plays an important role in maintenance of the CSC properties of HCC sphere cells by promoting nuclear accumulation of β-Catenin. Inhibition of SCD1 interfered with sphere formation, down-regulated expression of CSC-related markers, and reduced β-Catenin nuclear accumulation. CONCLUSIONS Sphere-forming culture can effectively enrich subpopulations with stem-cell properties, which are maintained through activation of the PPARα-SCD1 axis. Therefore, we suggest that targeting the SCD1-related CSC machinery might provide a novel insight into HCC treatment.
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Affiliation(s)
- Xiao-Lu Ma
- Department of Laboratory Medicine, Zhongshan Hospital, Fudan University, 136 Yi Xue Yuan Road, Shanghai, 200032 People’s Republic of China
| | - Yun-Fan Sun
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, 136 Yi Xue Yuan Road, Shanghai, 200032 People’s Republic of China
| | - Bei-Li Wang
- Department of Laboratory Medicine, Zhongshan Hospital, Fudan University, 136 Yi Xue Yuan Road, Shanghai, 200032 People’s Republic of China
| | - Min-Na Shen
- Department of Laboratory Medicine, Zhongshan Hospital, Fudan University, 136 Yi Xue Yuan Road, Shanghai, 200032 People’s Republic of China
| | - Yan Zhou
- Department of Laboratory Medicine, Zhongshan Hospital, Fudan University, 136 Yi Xue Yuan Road, Shanghai, 200032 People’s Republic of China
| | - Jian-Wen Chen
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, 136 Yi Xue Yuan Road, Shanghai, 200032 People’s Republic of China
| | - Bo Hu
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, 136 Yi Xue Yuan Road, Shanghai, 200032 People’s Republic of China
| | - Zi-Jun Gong
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, 136 Yi Xue Yuan Road, Shanghai, 200032 People’s Republic of China
| | - Xin Zhang
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, 136 Yi Xue Yuan Road, Shanghai, 200032 People’s Republic of China
| | - Ya Cao
- Cancer Research Institute, Xiangya School of Medicine, Central South University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Changsha, 410078 China
| | - Bai-shen Pan
- Department of Laboratory Medicine, Zhongshan Hospital, Fudan University, 136 Yi Xue Yuan Road, Shanghai, 200032 People’s Republic of China
| | - Jian Zhou
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, 136 Yi Xue Yuan Road, Shanghai, 200032 People’s Republic of China
| | - Jia Fan
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, 136 Yi Xue Yuan Road, Shanghai, 200032 People’s Republic of China
| | - Wei Guo
- Department of Laboratory Medicine, Zhongshan Hospital, Fudan University, 136 Yi Xue Yuan Road, Shanghai, 200032 People’s Republic of China
| | - Xin-Rong Yang
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, 136 Yi Xue Yuan Road, Shanghai, 200032 People’s Republic of China
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Wu X, Tian H, Xue L, Wang L. SIRT6 abrogation promotes adrenocortical carcinoma through activation of NF-κB signaling. Mol Cell Biochem 2019; 458:1-10. [PMID: 30989475 DOI: 10.1007/s11010-019-03525-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 03/15/2019] [Indexed: 02/05/2023]
Abstract
As an uncommon malignancy in the adrenal gland, adrenocortical carcinoma (ACC) is characterized by thorny diagnosis and poor clinical outcome, necessitating innovative treatment strategies. Sirtuin 6 (SIRT6), a tumor suppressor, modulates aerobic glycolysis of malignant cells and has an impact on tumorigenesis. This study focused on investigating SIRT6 expression in ACC and how it generates cancer phenotypes. SIRT6 expression was inhibited in ACC tissues according to western blotting, real-time polymerase chain reaction, and immunohistochemistry. MTT assay, TUNEL assay, and flow cytometry were performed to evaluate the contribution of SIRT6 to cell invasion, proliferation, death, and migration. It was shown that SIRT6 knockdown promoted cell invasion, proliferation, and migration, and inhibited cell death. Moreover, it was found that SIRT6 knockdown upregulated TLR4 and reinforced phosphorylation of the nuclear transcription factor-kappa B (NF-κB) subunit p65 as well as inhibitor of nuclear factor kappa-B kinase. Additionally, SIRT6 knockdown significantly enhanced expression of calcitonin gene-related peptide as well as transient receptor potential vanilloid subtype 1. It also reinforced reactive oxygen species generation. Overall, our research findings demonstrate that SIRT6 serves as a tumor suppressor via regulation of the NF-κB pathway, which could offer an innovative strategy to treat ACC.
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Affiliation(s)
- Xueyi Wu
- Department of Endocrinology and Metabolism, West China Hospital, Sichuan University, No. 37, Guoxue Lane, Chengdu, 610041, Sichuan, China
| | - Haoming Tian
- Department of Endocrinology and Metabolism, West China Hospital, Sichuan University, No. 37, Guoxue Lane, Chengdu, 610041, Sichuan, China.
| | - Long Xue
- Department of Intensive Medicine, Women and Children's Hospital of Sichuan Province, Chengdu, 610043, China
| | - Lizhi Wang
- Department of Eugenics, Women and Children's Hospital of Sichuan Province, Chengdu, 610043, China
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28
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Sharif T, Martell E, Dai C, Ghassemi-Rad MS, Kennedy BE, Lee PWK, Gujar S. Regulation of Cancer and Cancer-Related Genes via NAD . Antioxid Redox Signal 2019; 30:906-923. [PMID: 29334761 DOI: 10.1089/ars.2017.7478] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
SIGNIFICANCE NAD+ is an essential redox cofactor in cellular metabolism and has emerged as an important regulator of a wide spectrum of disease conditions, most notably, cancers. As such, various strategies targeting NAD+ synthesis in cancers are in clinical trials. Recent Advances: Being a substrate required for the activity of various enzyme families, especially sirtuins and poly(adenosine diphosphate [ADP]-ribose) polymerases, NAD+-mediated signaling plays an important role in gene expression, calcium release, cell cycle progression, DNA repair, and cell proliferation. Many strategies exploring the potential of interfering with NAD+ metabolism to sensitize cancer cells to achieve anticancer benefits are highly promising, and are being pursued. CRITICAL ISSUES With the multifaceted roles of NAD+ in cancer, it is important to understand how cellular processes are reliant on NAD+. This review summarizes how NAD+ metabolism regulates various pathophysiological processes in cancer, and how this knowledge can be exploited to devise effective anticancer therapies in clinical settings. FUTURE DIRECTIONS In line with the redundant pathways that facilitate NAD+ metabolism, further studies should comprehensively understand the roles of the various NAD+-synthesizing as well as NAD+-utilizing biomolecules to understand its true potential in cancer treatment.
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Affiliation(s)
- Tanveer Sharif
- 1 Department of Microbiology and Immunology, Dalhousie University, Halifax, Canada
| | - Emma Martell
- 2 Department of Pathology, Dalhousie University, Halifax, Canada
| | - Cathleen Dai
- 1 Department of Microbiology and Immunology, Dalhousie University, Halifax, Canada
| | | | - Barry E Kennedy
- 1 Department of Microbiology and Immunology, Dalhousie University, Halifax, Canada
| | - Patrick W K Lee
- 1 Department of Microbiology and Immunology, Dalhousie University, Halifax, Canada.,2 Department of Pathology, Dalhousie University, Halifax, Canada
| | - Shashi Gujar
- 1 Department of Microbiology and Immunology, Dalhousie University, Halifax, Canada.,2 Department of Pathology, Dalhousie University, Halifax, Canada.,3 Department of Biology, Dalhousie University, Halifax, Canada.,4 Centre for Innovative and Collaborative Health Systems Research, IWK Health Centre, Halifax, Canada
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29
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Yu J, Sun W, Song Y, Liu J, Xue F, Gong K, Yang X, Kang Q. SIRT6 protects retinal ganglion cells against hydrogen peroxide-induced apoptosis and oxidative stress by promoting Nrf2/ARE signaling via inhibition of Bach1. Chem Biol Interact 2019; 300:151-158. [DOI: 10.1016/j.cbi.2019.01.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 01/12/2019] [Accepted: 01/16/2019] [Indexed: 01/19/2023]
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30
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Carafa V, Altucci L, Nebbioso A. Dual Tumor Suppressor and Tumor Promoter Action of Sirtuins in Determining Malignant Phenotype. Front Pharmacol 2019; 10:38. [PMID: 30761005 PMCID: PMC6363704 DOI: 10.3389/fphar.2019.00038] [Citation(s) in RCA: 115] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 01/14/2019] [Indexed: 12/13/2022] Open
Abstract
Sirtuins (SIRTs), class III histone deacetylases, are differentially expressed in several human cancers, where they display both oncogenic and tumor-suppressive properties depending on cellular context and experimental conditions. SIRTs are involved in many important biological processes and play a critical role in cancer initiation, promotion, and progression. A growing body of evidence indicates the involvement of SIRTs in regulating three important tumor processes: epithelial-to-mesenchymal transition (EMT), invasion, and metastasis. Many SIRTs are responsible for cellular metabolic reprogramming and drug resistance by inactivating cell death pathways and promoting uncontrolled proliferation. In this review, we summarize current knowledge on the role of SIRTs in cancer and discuss their puzzling dual function as tumor suppressors and tumor promoters, important for the future development of novel tailored SIRT-based cancer therapies.
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Affiliation(s)
- Vincenzo Carafa
- Dipartimento di Medicina di Precisione, Università degli Studi della Campania Luigi Vanvitelli, Naples, Italy
| | - Lucia Altucci
- Dipartimento di Medicina di Precisione, Università degli Studi della Campania Luigi Vanvitelli, Naples, Italy
| | - Angela Nebbioso
- Dipartimento di Medicina di Precisione, Università degli Studi della Campania Luigi Vanvitelli, Naples, Italy
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Nicotine promotes neuron survival and partially protects from Parkinson's disease by suppressing SIRT6. Acta Neuropathol Commun 2018; 6:120. [PMID: 30409187 PMCID: PMC6223043 DOI: 10.1186/s40478-018-0625-y] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 10/28/2018] [Indexed: 12/27/2022] Open
Abstract
Parkinson’s disease is characterized by progressive death of dopaminergic neurons, leading to motor and cognitive dysfunction. Epidemiological studies consistently show that the use of tobacco reduces the risk of Parkinson’s. We report that nicotine reduces the abundance of SIRT6 in neuronal culture and brain tissue. We find that reduction of SIRT6 is partly responsible for neuroprotection afforded by nicotine. Additionally, SIRT6 abundance is greater in Parkinson’s patient brains, and decreased in the brains of tobacco users. We also identify SNPs that promote SIRT6 expression and simultaneously associate with an increased risk of Parkinson’s. Furthermore, brain-specific SIRT6 knockout mice are protected from MPTP-induced Parkinson’s, while SIRT6 overexpressing mice develop more severe pathology. Our data suggest that SIRT6 plays a pathogenic and pro-inflammatory role in Parkinson’s and that nicotine can provide neuroprotection by accelerating its degradation. Inhibition of SIRT6 may be a promising strategy to ameliorate Parkinson’s and neurodegeneration.
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Ouyang L, Yi L, Li J, Yi S, Li S, Liu P, Yang X. SIRT6 overexpression induces apoptosis of nasopharyngeal carcinoma by inhibiting NF-κB signaling. Onco Targets Ther 2018; 11:7613-7624. [PMID: 30464510 PMCID: PMC6219112 DOI: 10.2147/ott.s179866] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Previous reports show that SIRT6 serves as a critical modulator of the development of multiple malignancies as well as other disorders. However, its role in nasopharyngeal carcinoma (NPC) is unknown. Thus, we elucidated the effects of SIRT6 on the survival of NPC cells, and modulation of cell death. METHODS We found that expression of SIRT6 is downregulated in ten human NPC specimens as well as in the human NPC cell lines, 5-8 F and CNE1, as compared with that in healthy tissues and normal nasopharyngeal NP69 cells. The MTT assay and colony formation assay revealed that upregulation of SIRT6 impaired the proliferation, as well as the survival of 5-8 F and CNE1 cells. The TUNEL assay, annexin V-FITC/propidium iodide, and flow cytometry were performed to detect apoptosis. The results revealed that the expression of SIRT6 resulted in increased apoptosis. RESULTS Western blotting results showed that SIRT6 overexpression decreased anti-apoptotic Bcl-2 levels, whereas it promoted an increase in pro-apoptotic Bax and cleaved caspase-3 levels. Moreover, NF-κB levels were markedly reduced in cells expressing SIRT6, whereas they were increased in cells transfected with shRNA-SIRT6. Recovery of NF-κB expression was found to counter the suppressive influence of SIRT6 on NPC cell survival, whereas, NF-κB knockdown increased apoptosis of NPC cells. CONCLUSION Thus, the findings of our study offer insight into the biological and molecular mechanisms underlying the development of NPC and may lead to the development of new and innovative strategies for the treatment of NPC.
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Affiliation(s)
- Lei Ouyang
- Department of Otolaryngology, Head and Neck Surgery, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan, People's Republic of China,
| | - Liang Yi
- Department of Otolaryngology, Head and Neck Surgery, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan, People's Republic of China,
| | - Jingkun Li
- Department of Otolaryngology, Head and Neck Surgery, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan, People's Republic of China,
| | - Shijiang Yi
- Department of Otolaryngology, Head and Neck Surgery, the Affiliated Hospital of Guilin Medical College, the Institute of Otolaryngology of Guilin Medical College, Guilin, 541001 Guangxi, People's Republic of China,
| | - Shisheng Li
- Department of Otolaryngology, Head and Neck Surgery, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan, People's Republic of China,
| | - Peng Liu
- Department of Otolaryngology, Head and Neck Surgery, the Affiliated Hospital of Guilin Medical College, the Institute of Otolaryngology of Guilin Medical College, Guilin, 541001 Guangxi, People's Republic of China,
| | - Xinming Yang
- Department of Otolaryngology, Head and Neck Surgery, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan, People's Republic of China,
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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.
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Iachettini S, Trisciuoglio D, Rotili D, Lucidi A, Salvati E, Zizza P, Di Leo L, Del Bufalo D, Ciriolo MR, Leonetti C, Steegborn C, Mai A, Rizzo A, Biroccio A. Pharmacological activation of SIRT6 triggers lethal autophagy in human cancer cells. Cell Death Dis 2018; 9:996. [PMID: 30250025 PMCID: PMC6155207 DOI: 10.1038/s41419-018-1065-0] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 08/27/2018] [Accepted: 08/28/2018] [Indexed: 02/08/2023]
Abstract
Sirtuin 6 (SIRT6) is a member of the NAD+-dependent class III deacetylase sirtuin family, which plays a key role in cancer by controlling transcription, genome stability, telomere integrity, DNA repair, and autophagy. Here we analyzed the molecular and biological effects of UBCS039, the first synthetic SIRT6 activator. Our data demonstrated that UBCS039 induced a time-dependent activation of autophagy in several human tumor cell lines, as evaluated by increased content of the lipidated form of LC3B by western blot and of autophagosomal puncta by microscopy analysis of GFP-LC3. UBCS039-mediated activation of autophagy was strictly dependent on SIRT6 deacetylating activity since the catalytic mutant H133Y failed to activate autophagy. At the molecular level, SIRT6-mediated autophagy was triggered by an increase of ROS levels, which, in turn, resulted in the activation of the AMPK-ULK1-mTOR signaling pathway. Interestingly, antioxidants were able to completely counteract UBCS039-induced autophagy, suggesting that ROS burst had a key role in upstream events leading to autophagy commitment. Finally, sustained activation of SIRT6 resulted in autophagy-related cell death, a process that was markedly attenuated using either a pan caspases inhibitor (zVAD-fmk) or an autophagy inhibitor (CQ). Overall, our results identified UBCS039 as an efficient SIRT6 activator, thereby providing a proof of principle that modulation of the enzyme can influence therapeutic strategy by enhancing autophagy-dependent cell death.
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Affiliation(s)
- Sara Iachettini
- Oncogenomic and Epigenetic Unit, IRCCS-Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144, Rome, Italy
| | - Daniela Trisciuoglio
- Preclinical Models and New Therapeutic Agents Unit, IRCCS-Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144, Rome, Italy.,Institute of Molecular Biology and Pathology, CNR National Research Council, Via degli Apuli 4, 00185, Rome, Italy
| | - Dante Rotili
- Department of Drug Chemistry and Technologies, Sapienza University, Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Alessia Lucidi
- Department of Drug Chemistry and Technologies, Sapienza University, Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Erica Salvati
- Oncogenomic and Epigenetic Unit, IRCCS-Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144, Rome, Italy
| | - Pasquale Zizza
- Oncogenomic and Epigenetic Unit, IRCCS-Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144, Rome, Italy
| | - Luca Di Leo
- Department of Biology, University of Rome "Tor Vergata", Via della Ricerca Scientifica 1, 00133, Rome, Italy
| | - Donatella Del Bufalo
- Preclinical Models and New Therapeutic Agents Unit, IRCCS-Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144, Rome, Italy
| | - Maria Rosa Ciriolo
- Department of Biology, University of Rome "Tor Vergata", Via della Ricerca Scientifica 1, 00133, Rome, Italy
| | - Carlo Leonetti
- SAFU, IRCCS-Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144, Rome, Italy
| | - Clemens Steegborn
- Department of Biochemistry, University of Bayreuth, 95440, Bayreuth, Germany
| | - Antonello Mai
- Department of Drug Chemistry and Technologies, Sapienza University, Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Angela Rizzo
- Oncogenomic and Epigenetic Unit, IRCCS-Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144, Rome, Italy.
| | - Annamaria Biroccio
- Oncogenomic and Epigenetic Unit, IRCCS-Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144, Rome, Italy.
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Transcriptomic response of breast cancer cells to anacardic acid. Sci Rep 2018; 8:8063. [PMID: 29795261 PMCID: PMC5966448 DOI: 10.1038/s41598-018-26429-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 05/10/2018] [Indexed: 02/07/2023] Open
Abstract
Anacardic acid (AnAc), a potential dietary agent for preventing and treating breast cancer, inhibited the proliferation of estrogen receptor α (ERα) positive MCF-7 and MDA-MB-231 triple negative breast cancer cells. To characterize potential regulators of AnAc action, MCF-7 and MDA-MB-231 cells were treated for 6 h with purified AnAc 24:1n5 congener followed by next generation transcriptomic sequencing (RNA-seq) and network analysis. We reported that AnAc-differentially regulated miRNA transcriptomes in each cell line and now identify AnAc-regulated changes in mRNA and lncRNA transcript expression. In MCF-7 cells, 80 AnAc-responsive genes were identified, including lncRNA MIR22HG. More AnAc-responsive genes (886) were identified in MDA-MB-231 cells. Only six genes were commonly altered by AnAc in both cell lines: SCD, INSIG1, and TGM2 were decreased and PDK4, GPR176, and ZBT20 were increased. Modeling of AnAc-induced gene changes suggests that AnAc inhibits monounsaturated fatty acid biosynthesis in both cell lines and increases endoplasmic reticulum stress in MDA-MB-231 cells. Since modeling of downregulated genes implicated NFκB in MCF-7, we confirmed that AnAc inhibited TNFα-induced NFκB reporter activity in MCF-7 cells. These data identify new targets and pathways that may account for AnAc’s anti-proliferative and pro-apoptotic activity.
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Chen X, Li D, Gao Y, Cao Y, Hao B. Histone deacetylase SIRT6 inhibits glioma cell growth through down-regulating NOTCH3 expression. Acta Biochim Biophys Sin (Shanghai) 2018; 50:417-424. [PMID: 29659670 DOI: 10.1093/abbs/gmy019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Indexed: 01/05/2023] Open
Abstract
Gliomas are the most common brain tumors of the central nervous system. In this study, we investigated the molecular mechanisms and biological function of SIRT6 in human gliomas. The expression levels of SIRT6 in glioma tissues and cells were analyzed by qRT-PCR and western blot analysis. CCK8 and clonogenicity assays were performed to detect the cell proliferation. Furthermore, the migration and invasion of glioma cells were examined by transwell assays. It was found that the expression of SIRT6 was significantly lower in human glioma tissues or cell lines compared with the normal brain tissue or NHA. Up-regulated SIRT6 significantly decreased cell proliferation, migration and invasion of U87 and U251 cells. By contrast, knockdown of SIRT6 dramatically increased cell proliferation, migration and invasion of U87 and U251 cells. Moreover, over expression of NOTCH3 significantly increased the cell proliferation, migration, and invasion of U87 and U251 cells. However, these effects were abolished after overexpression of SIRT6. These results suggest that SIRT6 may suppress cell proliferation, migration, and invasion via inhibition of the NOTCH3 signaling pathway in glioma.
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Affiliation(s)
- Xin Chen
- Department of Neurosurgery, Fudan University Shanghai Cancer Center, Shanghai 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Deheng Li
- Department of Neurosurgery, Fudan University Shanghai Cancer Center, Shanghai 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Yang Gao
- Department of Neurosurgery, Fudan University Shanghai Cancer Center, Shanghai 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Yiqun Cao
- Department of Neurosurgery, Fudan University Shanghai Cancer Center, Shanghai 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Bin Hao
- Department of Neurosurgery, Fudan University Shanghai Cancer Center, Shanghai 200032, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
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O'Callaghan C, Vassilopoulos A. Sirtuins at the crossroads of stemness, aging, and cancer. Aging Cell 2017; 16:1208-1218. [PMID: 28994177 PMCID: PMC5676072 DOI: 10.1111/acel.12685] [Citation(s) in RCA: 134] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/01/2017] [Indexed: 12/27/2022] Open
Abstract
Sirtuins are stress‐responsive proteins that direct various post‐translational modifications (PTMs) and as a result, are considered to be master regulators of several cellular processes. They are known to both extend lifespan and regulate spontaneous tumor development. As both aging and cancer are associated with altered stem cell function, the possibility that the involvement of sirtuins in these events is mediated by their roles in stem cells is worthy of investigation. Research to date suggests that the individual sirtuin family members can differentially regulate embryonic, hematopoietic as well as other adult stem cells in a tissue‐ and cell type‐specific context. Sirtuin‐driven regulation of both cell differentiation and signaling pathways previously involved in stem cell maintenance has been described where downstream effectors involved determine the biological outcome. Similarly, diverse roles have been reported in cancer stem cells (CSCs), depending on the tissue of origin. This review highlights the current knowledge which places sirtuins at the intersection of stem cells, aging, and cancer. By outlining the plethora of stem cell‐related roles for individual sirtuins in various contexts, our purpose was to provide an indication of their significance in relation to cancer and aging, as well as to generate a clearer picture of their therapeutic potential. Finally, we propose future directions which will contribute to the better understanding of sirtuins, thereby further unraveling the full repertoire of sirtuin functions in both normal stem cells and CSCs.
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Affiliation(s)
- Carol O'Callaghan
- Laboratory for Molecular Cancer Biology Department of Radiation Oncology Feinberg School of Medicine Northwestern University Chicago IL USA
| | - Athanassios Vassilopoulos
- Laboratory for Molecular Cancer Biology Department of Radiation Oncology Feinberg School of Medicine Northwestern University Chicago IL USA
- Robert H. Lurie Comprehensive Cancer Center Northwestern University Chicago IL USA
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Hepatic protein tyrosine phosphatase receptor gamma links obesity-induced inflammation to insulin resistance. Nat Commun 2017; 8:1820. [PMID: 29180649 PMCID: PMC5703876 DOI: 10.1038/s41467-017-02074-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Accepted: 11/03/2017] [Indexed: 12/31/2022] Open
Abstract
Obesity-induced inflammation engenders insulin resistance and type 2 diabetes mellitus (T2DM) but the inflammatory effectors linking obesity to insulin resistance are incompletely understood. Here, we show that hepatic expression of Protein Tyrosine Phosphatase Receptor Gamma (PTPR-γ) is stimulated by inflammation in obese/T2DM mice and positively correlates with indices of inflammation and insulin resistance in humans. NF-κB binds to the promoter of Ptprg and is required for inflammation-induced PTPR-γ expression. PTPR-γ loss-of-function lowers glycemia and insulinemia by enhancing insulin-stimulated suppression of endogenous glucose production. These phenotypes are rescued by re-expression of Ptprg only in liver of mice lacking Ptprg globally. Hepatic PTPR-γ overexpression that mimics levels found in obesity is sufficient to cause severe hepatic and systemic insulin resistance. We propose hepatic PTPR-γ as a link between obesity-induced inflammation and insulin resistance and as potential target for treatment of T2DM. During obesity, chronic inflammation leads to insulin resistance and diabetes. Here, Brenachot et al. show that Protein Tyrosine Phosphatase Receptor Gamma is upregulated in obesity by inflammatory signals and correlates with insulin resistance in humans. Its deletion in mouse models of obesity and inflammation ameliorates insulin resistance by suppressing glucose production.
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Tang X, Chen XF, Chen HZ, Liu DP. Mitochondrial Sirtuins in cardiometabolic diseases. Clin Sci (Lond) 2017; 131:2063-2078. [DOI: 10.1042/cs20160685] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
Mitochondria are heterogeneous and essentially contribute to cellular functions and tissue homeostasis. Mitochondrial dysfunction compromises overall cell functioning, tissue damage, and diseases. The advances in mitochondrion biology increase our understanding of mitochondrial dynamics, bioenergetics, and redox homeostasis, and subsequently, their functions in tissue homeostasis and diseases, including cardiometabolic diseases (CMDs). The functions of mitochondria mainly rely on the enzymes in their matrix. Sirtuins are a family of NAD+-dependent deacylases and ADP-ribosyltransferases. Three members of the Sirtuin family (SIRT3, SIRT4, and SIRT5) are located in the mitochondrion. These mitochondrial Sirtuins regulate energy and redox metabolism as well as mitochondrial dynamics in the mitochondrial matrix and are involved in cardiovascular homeostasis and CMDs. In this review, we discuss the advances in our understanding of mitochondrial Sirtuins in mitochondrion biology and CMDs, including cardiac remodeling, pulmonary artery hypertension, and vascular dysfunction. The potential therapeutic strategies by targetting mitochondrial Sirtuins to improve mitochondrial function in CMDs are also addressed.
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Affiliation(s)
- Xiaoqiang Tang
- State Key Laboratory of Medical Molecular Biology, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, 5 Dong Dan San Tiao, Beijing 100005, P.R. China
| | - Xiao-Feng Chen
- State Key Laboratory of Medical Molecular Biology, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, 5 Dong Dan San Tiao, Beijing 100005, P.R. China
| | - Hou-Zao Chen
- State Key Laboratory of Medical Molecular Biology, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, 5 Dong Dan San Tiao, Beijing 100005, P.R. China
| | - De-Pei Liu
- State Key Laboratory of Medical Molecular Biology, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, 5 Dong Dan San Tiao, Beijing 100005, P.R. China
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Lin H, Hao Y, Zhao Z, Tong Y. Sirtuin 6 contributes to migration and invasion of osteosarcoma cells via the ERK1/2/MMP9 pathway. FEBS Open Bio 2017; 7:1291-1301. [PMID: 28904859 PMCID: PMC5586348 DOI: 10.1002/2211-5463.12265] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 06/08/2017] [Accepted: 06/26/2017] [Indexed: 12/11/2022] Open
Abstract
Dysregulation of sirtuin 6 (SIRT6) is actively involved in tumor progression. High levels of SIRT6 have been associated with hepatocellular carcinoma and non‐small cell lung cancer, and SIRT6 facilitates growth and metastasis of cancer cells. However, the clinical significance and biological function of SIRT6 are not known for osteosarcoma (OS). Here, we report that SIRT6 was notably overexpressed in OS tissues compared with non‐cancerous specimens. The high level of SIRT6 was prominently correlated with malignant clinical parameters and poor prognosis of OS patients. SIRT6 was also up‐regulated in OS cells. SIRT6 knockdown inhibited the invasion and migration of Saos‐2 and U2OS cells in vitro, while SIRT6 restoration increased these cellular biological behaviors in MG‐63 cells. Mechanistically, SIRT6 up‐regulated expression of matrix metallopeptidase 9 (MMP9) in OS cells. MMP9 restoration partially abolished the effects of SIRT6 knockdown on OS cells, with increased cell migration and invasion. MMP9 knockdown reduced migration and invasion of SIRT6‐overexpressing MG‐63 cells. Furthermore, SIRT6 positively modulated the levels of phosphorylated extracellular signal‐regulated kinases 1 and 2 (ERK1/2). PD098059 and PD0325901, inhibitors of mitogen‐activated protein kinase kinase (MEK), blocked the regulatory effects of SIRT6 on p‐ERK1/2 and MMP9 levels, suggesting that SIRT6 regulated MMP9 abundance probably through the MEK–ERK1/2 pathway. These results suggest that SIRT6 may act as a prognostic predictor and a drug target for OS patients.
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Affiliation(s)
- Hang Lin
- Department of Orthopedics Zhejiang Hospital Hangzhou China
| | - Yi Hao
- Department of Orthopedics Zhejiang Hospital Hangzhou China
| | - Zhengxu Zhao
- Department of Orthopedics Zhejiang Hospital Hangzhou China
| | - Yongjun Tong
- Department of Orthopedics Zhejiang Hospital Hangzhou China
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Garrido A, Djouder N. NAD + Deficits in Age-Related Diseases and Cancer. Trends Cancer 2017; 3:593-610. [PMID: 28780936 DOI: 10.1016/j.trecan.2017.06.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 05/08/2017] [Accepted: 06/05/2017] [Indexed: 12/16/2022]
Abstract
The phenomenon of aging has gained widespread attention in recent times. Although significant advances have been made to better understand aging and its related pathologies including cancer, there is not yet a clear mechanism explaining why diseases and cancer are inherent parts of the aging process. Finding a unifying equation that could bridge aging and its related diseases would allow therapeutic development and solve an immense human health problem to live longer and better. In this review, we discuss NAD+ reduction as the central mechanism that may connect aging to its related pathologies and cancer. NAD+ boosters would ensure and ameliorate health quality during aging.
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Affiliation(s)
- Amanda Garrido
- Cancer Cell Biology Programme, Growth Factors, Nutrients and Cancer Group, Spanish National Cancer Research Centre, CNIO, Madrid, Spain
| | - Nabil Djouder
- Cancer Cell Biology Programme, Growth Factors, Nutrients and Cancer Group, Spanish National Cancer Research Centre, CNIO, Madrid, Spain.
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