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Manna PR, Yang S, Reddy PH. Epigenetic Dysregulation and Its Correlation with the Steroidogenic Machinery Impacting Breast Pathogenesis: Data Mining and Molecular Insights into Therapeutics. Int J Mol Sci 2023; 24:16488. [PMID: 38003678 PMCID: PMC10671690 DOI: 10.3390/ijms242216488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 11/14/2023] [Accepted: 11/16/2023] [Indexed: 11/26/2023] Open
Abstract
Breast cancer (BC) is a heterogeneous condition and comprises molecularly distinct subtypes. An imbalance in the levels of epigenetic histone deacetylases (HDACs), modulating estrogen accumulation, especially 17β-estradiol (E2), promotes breast tumorigenesis. In the present study, analyses of The Cancer Genome Atlas (TCGA) pan-cancer normalized RNA-Seq datasets revealed the dysregulation of 16 epigenetic enzymes (among a total of 18 members) in luminal BC subtypes, in comparison to their non-cancerous counterparts. Explicitly, genomic profiling of these epigenetic enzymes displayed increases in HDAC1, 2, 8, 10, 11, and Sirtuins (SIRTs) 6 and 7, and decreases in HDAC4-7, -9, and SIRT1-4 levels, respectively, in TCGA breast tumors. Kaplan-Meier plot analyses showed that these HDACs, with the exception of HDAC2 and SIRT2, were not correlated with the overall survival of BC patients. Additionally, disruption of the epigenetic signaling in TCGA BC subtypes, as assessed using both heatmaps and boxplots, was associated with the genomic expression of factors that are instrumental for cholesterol trafficking/utilization for accelerating estrogen/E2 levels, in which steroidogenic acute regulatory protein (STAR) mediates the rate-limiting step in steroid biosynthesis. TCGA breast samples showed diverse expression patterns of a variety of key steroidogenic markers and hormone receptors, including LIPE, CYP27A1, STAR, STARD3, CYP11A1, CYP19A1, ER, PGR, and ERBB2. Moreover, regulation of STAR-governed steroidogenic machinery was found to be influenced by various transcription factors, i.e., CREB1, CREM, SF1, NR4A1, CEBPB, SREBF1, SREBF2, SP1, FOS, JUN, NR0B1, and YY1. Along these lines, ingenuity pathway analysis (IPA) recognized a number of new targets and downstream effectors influencing BCs. Of note, genomic, epigenomic, transcriptional, and hormonal anomalies observed in human primary breast tumors were qualitatively similar in pertinent BC cell lines. These findings identify the functional correlation between dysregulated epigenetic enzymes and estrogen/E2 accumulation in human breast tumors, providing the molecular insights into more targeted therapeutic approaches involving the inhibition of HDACs for combating this life-threatening disease.
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Affiliation(s)
- Pulak R. Manna
- Department of Internal Medicine, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA;
| | - Shengping Yang
- Department of Biostatistics, Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA 70808, USA;
| | - P. Hemachandra Reddy
- Department of Internal Medicine, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA;
- Neurology, Departments of School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Public Health Department of Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Department of Speech, Language and Hearing Sciences, School Health Professions, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
- Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
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2
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Yang J, Gao C, Liu M, Liu YC, Kwon J, Qi J, Tian X, Stein A, Liu YV, Kong NR, Wu Y, Yin S, Xi J, Chen Z, Kumari K, Wong H, Luo H, Silberstein LE, Thoms JAI, Unnikrishnan A, Pimanda JE, Tenen DG, Chai L. Targeting an Inducible SALL4-Mediated Cancer Vulnerability with Sequential Therapy. Cancer Res 2021; 81:6018-6028. [PMID: 34593523 PMCID: PMC8639708 DOI: 10.1158/0008-5472.can-21-0030] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 07/28/2021] [Accepted: 09/29/2021] [Indexed: 11/16/2022]
Abstract
Oncofetal protein SALL4 is critical for cancer cell survival. Targeting SALL4, however, is only applicable in a fraction of cancer patients who are positive for this gene. To overcome this limitation, we propose to induce a cancer vulnerability by engineering a partial dependency upon SALL4. Following exogenous expression of SALL4, SALL4-negative cancer cells became partially dependent on SALL4. Treatment of SALL4-negative cells with the FDA-approved hypomethylating agent 5-aza-2'-deoxycytidine (DAC) resulted in transient upregulation of SALL4. DAC pretreatment sensitized SALL4-negative cancer cells to entinostat, which negatively affected SALL4 expression through a microRNA, miRNA-205, both in culture and in vivo. Moreover, SALL4 was essential for the efficiency of sequential treatment of DAC and entinostat. Overall, this proof-of-concept study provides a framework whereby the targeting pathways such as SALL4-centered therapy can be expanded, sensitizing cancer cells to treatment by transient target induction and engineering a dependency. SIGNIFICANCE: These findings provide a therapeutic approach for patients harboring no suitable target by induction of a SALL4-mediated vulnerability.
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Affiliation(s)
- Junyu Yang
- Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Chong Gao
- Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Miao Liu
- Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Yao-Chung Liu
- Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Junsu Kwon
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Jun Qi
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Xi Tian
- Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Alicia Stein
- Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Yanjing V Liu
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Nikki R Kong
- Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Yue Wu
- Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Shenyi Yin
- State Key Laboratory of Natural and Biomimetic Drugs, Institute of Molecular Medicine, Department of Biomedical Engineering, College of Engineering, Peking University, Beijing, China
| | - Jianzhong Xi
- State Key Laboratory of Natural and Biomimetic Drugs, Institute of Molecular Medicine, Department of Biomedical Engineering, College of Engineering, Peking University, Beijing, China
| | - Zhiyuan Chen
- Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Kalpana Kumari
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Hannan Wong
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Hongbo Luo
- Joint Program in Transfusion Medicine, Department of Laboratory Medicine, Boston Children's Hospital, Boston, Massachusetts
| | - Leslie E Silberstein
- Joint Program in Transfusion Medicine, Department of Laboratory Medicine, Boston Children's Hospital, Boston, Massachusetts
| | - Julie A I Thoms
- School of Medical Sciences and Lowy Cancer Research Centre, Faculty of Medicine, UNSW Sydney, New South Wales, Australia
| | - Ashwin Unnikrishnan
- Prince of Wales Clinical School and Lowy Cancer Research Centre, Faculty of Medicine, UNSW Sydney, New South Wales, Australia
| | - John E Pimanda
- School of Medical Sciences and Lowy Cancer Research Centre, Faculty of Medicine, UNSW Sydney, New South Wales, Australia
- Prince of Wales Clinical School and Lowy Cancer Research Centre, Faculty of Medicine, UNSW Sydney, New South Wales, Australia
- Department of Hematology, Prince of Wales Hospital, Randwick, New South Wales, Australia
| | - Daniel G Tenen
- Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore.
- Harvard Stem Cell Institute, Harvard Medical School, Boston, Massachusetts
| | - Li Chai
- Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts.
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3
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Li W, Wu H, Sui S, Wang Q, Xu S, Pang D. Targeting Histone Modifications in Breast Cancer: A Precise Weapon on the Way. Front Cell Dev Biol 2021; 9:736935. [PMID: 34595180 PMCID: PMC8476812 DOI: 10.3389/fcell.2021.736935] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 08/16/2021] [Indexed: 12/27/2022] Open
Abstract
Histone modifications (HMs) contribute to maintaining genomic stability, transcription, DNA repair, and modulating chromatin in cancer cells. Furthermore, HMs are dynamic and reversible processes that involve interactions between numerous enzymes and molecular components. Aberrant HMs are strongly associated with tumorigenesis and progression of breast cancer (BC), although the specific mechanisms are not completely understood. Moreover, there is no comprehensive overview of abnormal HMs in BC, and BC therapies that target HMs are still in their infancy. Therefore, this review summarizes the existing evidence regarding HMs that are involved in BC and the potential mechanisms that are related to aberrant HMs. Moreover, this review examines the currently available agents and approved drugs that have been tested in pre-clinical and clinical studies to evaluate their effects on HMs. Finally, this review covers the barriers to the clinical application of therapies that target HMs, and possible strategies that could help overcome these barriers and accelerate the use of these therapies to cure patients.
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Affiliation(s)
- Wei Li
- Harbin Medical University Third Hospital: Tumor Hospital of Harbin Medical University, Harbin, China
| | - Hao Wu
- Harbin Medical University Third Hospital: Tumor Hospital of Harbin Medical University, Harbin, China
| | - Shiyao Sui
- Harbin Medical University Third Hospital: Tumor Hospital of Harbin Medical University, Harbin, China
| | - Qin Wang
- Harbin Medical University Third Hospital: Tumor Hospital of Harbin Medical University, Harbin, China
| | - Shouping Xu
- Harbin Medical University Third Hospital: Tumor Hospital of Harbin Medical University, Harbin, China
| | - Da Pang
- Harbin Medical University Third Hospital: Tumor Hospital of Harbin Medical University, Harbin, China.,Heilongjiang Academy of Medical Sciences, Harbin, China
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Current Therapies in Nephrotic Syndrome: HDAC inhibitors, an Emerging Therapy for Kidney Diseases. CURRENT RESEARCH IN BIOTECHNOLOGY 2021. [DOI: 10.1016/j.crbiot.2021.05.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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You D, Richardson JR, Aleksunes LM. Epigenetic Regulation of Multidrug Resistance Protein 1 and Breast Cancer Resistance Protein Transporters by Histone Deacetylase Inhibition. Drug Metab Dispos 2020; 48:459-480. [PMID: 32193359 DOI: 10.1124/dmd.119.089953] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 02/13/2020] [Indexed: 02/06/2023] Open
Abstract
Multidrug resistance protein 1 (MDR1, ABCB1, P-glycoprotein) and breast cancer resistance protein (BCRP, ABCG2) are key efflux transporters that mediate the extrusion of drugs and toxicants in cancer cells and healthy tissues, including the liver, kidneys, and the brain. Altering the expression and activity of MDR1 and BCRP influences the disposition, pharmacodynamics, and toxicity of chemicals, including a number of commonly prescribed medications. Histone acetylation is an epigenetic modification that can regulate gene expression by changing the accessibility of the genome to transcriptional regulators and transcriptional machinery. Recently, studies have suggested that pharmacological inhibition of histone deacetylases (HDACs) modulates the expression and function of MDR1 and BCRP transporters as a result of enhanced histone acetylation. This review addresses the ability of HDAC inhibitors to modulate the expression and the function of MDR1 and BCRP transporters and explores the molecular mechanisms by which HDAC inhibition regulates these transporters. While the majority of studies have focused on histone regulation of MDR1 and BCRP in drug-resistant and drug-sensitive cancer cells, emerging data point to similar responses in nonmalignant cells and tissues. Elucidating epigenetic mechanisms regulating MDR1 and BCRP is important to expand our understanding of the basic biology of these two key transporters and subsequent consequences on chemoresistance as well as tissue exposure and responses to drugs and toxicants. SIGNIFICANCE STATEMENT: Histone deacetylase inhibitors alter the expression of key efflux transporters multidrug resistance protein 1 and breast cancer resistance protein in healthy and malignant cells.
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Affiliation(s)
- Dahea You
- Joint Graduate Program in Toxicology, Rutgers, The State University of New Jersey, Piscataway, New Jersey (D.Y.); Department of Environmental Health Sciences, Robert Stempel School of Public Health and Social Work, Florida International University, Miami, Florida (J.R.R.); Environmental and Occupational Health Sciences Institute, Piscataway, New Jersey (J.R.R., L.M.A.); and Department of Pharmacology and Toxicology, Rutgers, The State University of New Jersey, Ernest Mario School of Pharmacy, Piscataway, New Jersey (L.M.A.)
| | - Jason R Richardson
- Joint Graduate Program in Toxicology, Rutgers, The State University of New Jersey, Piscataway, New Jersey (D.Y.); Department of Environmental Health Sciences, Robert Stempel School of Public Health and Social Work, Florida International University, Miami, Florida (J.R.R.); Environmental and Occupational Health Sciences Institute, Piscataway, New Jersey (J.R.R., L.M.A.); and Department of Pharmacology and Toxicology, Rutgers, The State University of New Jersey, Ernest Mario School of Pharmacy, Piscataway, New Jersey (L.M.A.)
| | - Lauren M Aleksunes
- Joint Graduate Program in Toxicology, Rutgers, The State University of New Jersey, Piscataway, New Jersey (D.Y.); Department of Environmental Health Sciences, Robert Stempel School of Public Health and Social Work, Florida International University, Miami, Florida (J.R.R.); Environmental and Occupational Health Sciences Institute, Piscataway, New Jersey (J.R.R., L.M.A.); and Department of Pharmacology and Toxicology, Rutgers, The State University of New Jersey, Ernest Mario School of Pharmacy, Piscataway, New Jersey (L.M.A.)
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6
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Ediriweera MK, Tennekoon KH, Samarakoon SR. Emerging role of histone deacetylase inhibitors as anti-breast-cancer agents. Drug Discov Today 2019; 24:685-702. [DOI: 10.1016/j.drudis.2019.02.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Revised: 01/05/2019] [Accepted: 02/12/2019] [Indexed: 12/20/2022]
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7
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Seo J, Guk G, Park SH, Jeong MH, Jeong JH, Yoon HG, Choi KC. Tyrosine phosphorylation of HDAC3 by Src kinase mediates proliferation of HER2-positive breast cancer cells. J Cell Physiol 2018; 234:6428-6436. [PMID: 30317579 DOI: 10.1002/jcp.27378] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 08/17/2018] [Indexed: 12/27/2022]
Abstract
The role of histone deacetylase 3 (HDAC3) is to repress the expression of various genes by eliminating acetyl group from histone. Thus, the regulation of HDAC3 activity is essential to maintain cellular homeostasis. In this study, we found that HDAC3 interacts with c-Src kinase. However, the interaction between HDAC3 and c-Src was previously reported, it has still been ambiguous whether c-Src phosphorylates HDAC3 and affects the function of HDAC3. First, we confirmed that HDAC3 directly binds to c-Src, and c-Src identified to interact with C-terminal domain (277-428 a.a.) of HDAC3. c-Src also phosphorylated three tyrosine sites of HDAC3 at tyrosine 325, 328, and 331. Importantly, wild-type c-Src increases HDAC3 activity, but not mutant c-SrcK298M (kinase inactive form). When these tyrosine residues are all substituted for alanine residues, the deacetylase activity of mutant HDAC3 was abolished. In addition, a proliferation of HER2-positive breast cancer cells expressing phosphorylation deficient mutant HDAC3 is decreased in comparison with control cells. Thus, our findings suggested that phosphorylation of HDAC3 by c-Src kinase regulates the HDAC3 activity and the proliferation of breast cancer cells.
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Affiliation(s)
- Jaesung Seo
- Department of Biochemistry and Molecular Biology, Center for Chronic Metabolic Disease Research, Brain Korea 21 Plus Project for Medical Sciences, Severance Medical Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Garam Guk
- Department of Biochemistry and Molecular Biology, Center for Chronic Metabolic Disease Research, Brain Korea 21 Plus Project for Medical Sciences, Severance Medical Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Seung-Ho Park
- Department of Biomedical Sciences, Asan Medical Center, AMIST, University of Ulsan College of Medicine, Seoul, Republic of Korea.,Department of Pharmacology, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Mi-Hyeon Jeong
- Department of Biochemistry and Molecular Biology, Center for Chronic Metabolic Disease Research, Brain Korea 21 Plus Project for Medical Sciences, Severance Medical Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Ji-Hoon Jeong
- Department of Biomedical Sciences, Asan Medical Center, AMIST, University of Ulsan College of Medicine, Seoul, Republic of Korea.,Department of Pharmacology, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Ho-Geun Yoon
- Department of Biochemistry and Molecular Biology, Center for Chronic Metabolic Disease Research, Brain Korea 21 Plus Project for Medical Sciences, Severance Medical Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Kyung-Chul Choi
- Department of Biomedical Sciences, Asan Medical Center, AMIST, University of Ulsan College of Medicine, Seoul, Republic of Korea.,Department of Pharmacology, University of Ulsan College of Medicine, Seoul, Republic of Korea
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8
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Augusto TV, Correia-da-Silva G, Rodrigues CMP, Teixeira N, Amaral C. Acquired resistance to aromatase inhibitors: where we stand! Endocr Relat Cancer 2018. [PMID: 29530940 DOI: 10.1530/erc-17-0425] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Aromatase inhibitors (AIs) are one of the principal therapeutic approaches for estrogen receptor-positive (ER+) breast cancer in postmenopausal women. They block estrogen biosynthesis through aromatase inhibition, thus preventing tumour progression. Besides the therapeutic success of the third-generation AIs, acquired resistance may develop, leading to tumour relapse. This resistance is thought to be the result of a change in the behaviour of ER in these breast cancer cells, presumably by PI3K/AKT pathway enhancement along with alterations in other signalling pathways. Nevertheless, biological mechanisms, such as apoptosis, autophagy, cell cycle modulation and activation of androgen receptor (AR), are also implicated in acquired resistance. Moreover, clinical evidence demonstrated that there is a lack of cross-resistance among AIs, although the reason is not fully understood. Thus, there is a demand to understand the mechanisms involved in endocrine resistance to each AI, since the search for new strategies to surpass breast cancer acquired resistance is of major concern.
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Affiliation(s)
- Tiago Vieira Augusto
- UCIBIO.REQUIMTE, Laboratory of Biochemistry, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Georgina Correia-da-Silva
- UCIBIO.REQUIMTE, Laboratory of Biochemistry, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Cecília M P Rodrigues
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon, Lisbon, Portugal
| | - Natércia Teixeira
- UCIBIO.REQUIMTE, Laboratory of Biochemistry, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Cristina Amaral
- UCIBIO.REQUIMTE, Laboratory of Biochemistry, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
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9
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Targeting the Epigenome as a Novel Therapeutic Approach for Breast Cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 1026:287-313. [DOI: 10.1007/978-981-10-6020-5_14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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10
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Kumar P, Gogulamudi VR, Periasamy R, Raghavaraju G, Subramanian U, Pandey KN. Inhibition of HDAC enhances STAT acetylation, blocks NF-κB, and suppresses the renal inflammation and fibrosis in Npr1 haplotype male mice. Am J Physiol Renal Physiol 2017; 313:F781-F795. [PMID: 28566502 PMCID: PMC5625105 DOI: 10.1152/ajprenal.00166.2017] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 05/24/2017] [Accepted: 05/29/2017] [Indexed: 11/22/2022] Open
Abstract
Guanylyl cyclase/natriuretic peptide receptor-A (GC-A/NPRA) plays a critical role in the regulation of blood pressure and fluid volume homeostasis. Mice lacking functional Npr1 (coding for GC-A/NPRA) exhibit hypertension and congestive heart failure. However, the underlying mechanisms remain largely less clear. The objective of the present study was to determine the physiological efficacy and impact of all-trans-retinoic acid (ATRA) and sodium butyrate (NaBu) in ameliorating the renal fibrosis, inflammation, and hypertension in Npr1 gene-disrupted haplotype (1-copy; +/-) mice (50% expression levels of NPRA). Both ATRA and NaBu, either alone or in combination, decreased the elevated levels of renal proinflammatory and profibrotic cytokines and lowered blood pressure in Npr1+/- mice compared with untreated controls. The treatment with ATRA-NaBu facilitated the dissociation of histone deacetylase (HDAC) 1 and 2 from signal transducer and activator of transcription 1 (STAT1) and enhanced its acetylation in the kidneys of Npr1+/- mice. The acetylated STAT1 formed a complex with nuclear factor-κB (NF-κB) p65, thereby inhibiting its DNA-binding activity and downstream proinflammatory and profibrotic signaling cascades. The present results demonstrate that the treatment of the haplotype Npr1+/- mice with ATRA-NaBu significantly lowered blood pressure and reduced the renal inflammation and fibrosis involving the interactive roles of HDAC, NF-κB (p65), and STAT1. The current findings will help in developing the molecular therapeutic targets and new treatment strategies for hypertension and renal dysfunction in humans.
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Affiliation(s)
- Prerna Kumar
- Department of Physiology, Tulane University Health Sciences Center, School of Medicine, New Orleans, Louisiana
| | - Venkateswara R Gogulamudi
- Department of Physiology, Tulane University Health Sciences Center, School of Medicine, New Orleans, Louisiana
| | - Ramu Periasamy
- Department of Physiology, Tulane University Health Sciences Center, School of Medicine, New Orleans, Louisiana
| | - Giri Raghavaraju
- Department of Physiology, Tulane University Health Sciences Center, School of Medicine, New Orleans, Louisiana
| | - Umadevi Subramanian
- Department of Physiology, Tulane University Health Sciences Center, School of Medicine, New Orleans, Louisiana
| | - Kailash N Pandey
- Department of Physiology, Tulane University Health Sciences Center, School of Medicine, New Orleans, Louisiana
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