1
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Gong W, Tian Y, Li L. T cells in abdominal aortic aneurysm: immunomodulation and clinical application. Front Immunol 2023; 14:1240132. [PMID: 37662948 PMCID: PMC10471798 DOI: 10.3389/fimmu.2023.1240132] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 08/07/2023] [Indexed: 09/05/2023] Open
Abstract
Abdominal aortic aneurysm (AAA) is characterized by inflammatory cell infiltration, extracellular matrix (ECM) degradation, and vascular smooth muscle cell (SMC) dysfunction. The inflammatory cells involved in AAA mainly include immune cells including macrophages, neutrophils, T-lymphocytes and B lymphocytes and endothelial cells. As the blood vessel wall expands, more and more lymphocytes infiltrate into the outer membrane. It was found that more than 50% of lymphocytes in AAA tissues were CD3+ T cells, including CD4+, CD8+T cells, γδ T cells and regulatory T cells (Tregs). Due to the important role of T cells in inflammatory response, an increasing number of researchers have paid attention to the role of T cells in AAA and dug into the relevant mechanism. Therefore, this paper focuses on reviewing the immunoregulatory role of T cells in AAA and their role in immunotherapy, seeking potential targets for immunotherapy and putting forward future research directions.
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Affiliation(s)
| | | | - Lei Li
- Department of Vascular Surgery, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
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2
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Ziętara P, Dziewięcka M, Augustyniak M. Why Is Longevity Still a Scientific Mystery? Sirtuins-Past, Present and Future. Int J Mol Sci 2022; 24:ijms24010728. [PMID: 36614171 PMCID: PMC9821238 DOI: 10.3390/ijms24010728] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/22/2022] [Accepted: 12/27/2022] [Indexed: 01/03/2023] Open
Abstract
The sirtuin system consists of seven highly conserved regulatory enzymes responsible for metabolism, antioxidant protection, and cell cycle regulation. The great interest in sirtuins is associated with the potential impact on life extension. This article summarizes the latest research on the activity of sirtuins and their role in the aging process. The effects of compounds that modulate the activity of sirtuins were discussed, and in numerous studies, their effectiveness was demonstrated. Attention was paid to the role of a caloric restriction and the risks associated with the influence of careless sirtuin modulation on the organism. It has been shown that low modulators' bioavailability/retention time is a crucial problem for optimal regulation of the studied pathways. Therefore, a detailed understanding of the modulator structure and potential reactivity with sirtuins in silico studies should precede in vitro and in vivo experiments. The latest achievements in nanobiotechnology make it possible to create promising molecules, but many of them remain in the sphere of plans and concepts. It seems that solving the mystery of longevity will have to wait for new scientific discoveries.
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3
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Xiang X, Zhu J, Dong G, Dong Z. Epigenetic Regulation in Kidney Transplantation. Front Immunol 2022; 13:861498. [PMID: 35464484 PMCID: PMC9024296 DOI: 10.3389/fimmu.2022.861498] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 03/17/2022] [Indexed: 12/29/2022] Open
Abstract
Kidney transplantation is a standard care for end stage renal disease, but it is also associated with a complex pathogenesis including ischemia-reperfusion injury, inflammation, and development of fibrosis. Over the past decade, accumulating evidence has suggested a role of epigenetic regulation in kidney transplantation, involving DNA methylation, histone modification, and various kinds of non-coding RNAs. Here, we analyze these recent studies supporting the role of epigenetic regulation in different pathological processes of kidney transplantation, i.e., ischemia-reperfusion injury, acute rejection, and chronic graft pathologies including renal interstitial fibrosis. Further investigation of epigenetic alterations, their pathological roles and underlying mechanisms in kidney transplantation may lead to new strategies for the discovery of novel diagnostic biomarkers and therapeutic interventions.
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Affiliation(s)
- Xiaohong Xiang
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, The Second Xiangya Hospital of Central South University, Changsha, China.,Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University and Charlie Norwood Veteran Affairs (VA) Medical Center, Augusta, GA, United States.,Department of Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Jiefu Zhu
- Center of Nephrology and Dialysis, Transplantation, Renmin Hospital of Wuhan University, Wuhan, China
| | - Guie Dong
- Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University and Charlie Norwood Veteran Affairs (VA) Medical Center, Augusta, GA, United States
| | - Zheng Dong
- Department of Nephrology, Hunan Key Laboratory of Kidney Disease and Blood Purification, The Second Xiangya Hospital of Central South University, Changsha, China.,Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University and Charlie Norwood Veteran Affairs (VA) Medical Center, Augusta, GA, United States
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4
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Sirtuins are crucial regulators of T cell metabolism and functions. Exp Mol Med 2022; 54:207-215. [PMID: 35296782 PMCID: PMC8979958 DOI: 10.1038/s12276-022-00739-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 12/23/2021] [Indexed: 01/01/2023] Open
Abstract
It is well known that metabolism underlies T cell differentiation and functions. The pathways regulating T cell metabolism and function are interconnected, and changes in T cell metabolic activity directly impact the effector functions and fate of T cells. Thus, understanding how metabolic pathways influence immune responses and ultimately affect disease progression is paramount. Epigenetic and posttranslational modification mechanisms have been found to control immune responses and metabolic reprogramming. Sirtuins are NAD+-dependent histone deacetylases that play key roles during cellular responses to a variety of stresses and have recently been reported to have potential roles in immune responses. Therefore, sirtuins are of significant interest as therapeutic targets to treat immune-related diseases and enhance antitumor immunity. This review aims to illustrate the potential roles of sirtuins in different subtypes of T cells during the adaptive immune response. Sirtuins, enzymes that regulate how cells respond to stress, regulate T cell metabolism and functions, and therefore blocking or boosting sirtuins influences immune responses. As part of the immune system, some types of T cells attack specific targets; others keep the immune response in check. Imene Hamaidi and Sungjune Kim at H. Lee Moffitt Cancer Center, Tampa, USA, have reviewed how sirtuins affect different subsets of T cells to either promote or suppress immune responses. Boosting sirtuins that increase the function of inflammation-suppressing T cells can improve outcomes for transplant recipients or help treat autoimmune diseases. Conversely, stimulating immune-activating sirtuins can help re-energize exhausted antitumor T cells. Understanding the complex web of sirtuin–T cell interactions may help in developing therapeutic strategies for improving transplant outcomes, and for treating autoimmune diseases and cancer.
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Wu X, Wang Z, Wang J, Tian X, Cao G, Gu Y, Shao F, Yan T. Exosomes Secreted by Mesenchymal Stem Cells Induce Immune Tolerance to Mouse Kidney Transplantation via Transporting LncRNA DANCR. Inflammation 2022; 45:460-475. [PMID: 34596768 DOI: 10.1007/s10753-021-01561-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 09/02/2021] [Accepted: 09/06/2021] [Indexed: 11/30/2022]
Abstract
Mesenchymal stem cells induce kidney transplant tolerance by increasing regulatory T (Treg) cells. Bone marrow mesenchymal stem cell exosomes (BMMSC-Ex) promote Treg cell differentiation. Long non-coding RNA differentiation antagonizing non-protein coding RNA (DANCR) is expressed in BMMSCs and can be encapsulated in exosomes. We aimed to explore the role of DANCR in BMMSC-Ex in immune tolerance after kidney transplantation and related mechanism. The isogenic/allograft kidney transplantation mouse model was established, and levels of serum creatinine (SCr) were determined. Hematoxylin-eosin staining was conducted to detect the inflammation, and immunohistochemistry was performed to detect the infiltration of CD4+ T cells. Levels of IFN-γ, IL-17, and IL-2 were examined by ELISA. Flow cytometry was conducted to determine Treg cells. In the allograft group, the inflammatory response was severe, CD4+ T cell infiltration, SCr levels, and plasma rejection-related factors were up-regulated, while injection of BMMSC-Ex reversed the results. BMMSC-Ex increased Treg cells in kidney transplantation mice. Interference with DANCR reversed the promoting effect of BMMSC-Ex on Treg cell differentiation. DANCR bound to SIRT1, promoted ubiquitination and accelerated its degradation. The injection of BMMSC-Ex (after interference with DANCR) promoted SIRT1 levels, inflammatory response, CD4+ T cell infiltration, SCr levels, and plasma rejection related factors' expression, while Treg cells were decreased. LncRNA DANCR in BMMSC-Ex promoted Treg cell differentiation and induced immune tolerance of kidney transplantation by down-regulating SIRT1 expression in CD4+ T cells.
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Affiliation(s)
- Xiaoqiang Wu
- Department of Urology, Henan Provincial Clinical Research Center for Kidney Disease, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, No. 7 Weiwu Road, Jinshui District, Zhengzhou, 450003, Henan, China
| | - Zhiwei Wang
- Department of Urology, Henan Provincial Clinical Research Center for Kidney Disease, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, No. 7 Weiwu Road, Jinshui District, Zhengzhou, 450003, Henan, China
| | - Junpeng Wang
- Department of Urology, Henan Provincial Clinical Research Center for Kidney Disease, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, No. 7 Weiwu Road, Jinshui District, Zhengzhou, 450003, Henan, China
| | - Xiangyong Tian
- Department of Urology, Henan Provincial Clinical Research Center for Kidney Disease, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, No. 7 Weiwu Road, Jinshui District, Zhengzhou, 450003, Henan, China
| | - Guanghui Cao
- Department of Urology, Henan Provincial Clinical Research Center for Kidney Disease, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, No. 7 Weiwu Road, Jinshui District, Zhengzhou, 450003, Henan, China
| | - Yue Gu
- Department of Nephrology, Henan Provincial Clinical Research Center for Kidney Disease, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Zhengzhou, 450003, Henan, China
| | - Fengmin Shao
- Department of Nephrology, Henan Provincial Clinical Research Center for Kidney Disease, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Zhengzhou, 450003, Henan, China
| | - Tianzhong Yan
- Department of Urology, Henan Provincial Clinical Research Center for Kidney Disease, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, No. 7 Weiwu Road, Jinshui District, Zhengzhou, 450003, Henan, China.
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Shen P, Deng X, Chen Z, Ba X, Qin K, Huang Y, Huang Y, Li T, Yan J, Tu S. SIRT1: A Potential Therapeutic Target in Autoimmune Diseases. Front Immunol 2021; 12:779177. [PMID: 34887866 PMCID: PMC8650132 DOI: 10.3389/fimmu.2021.779177] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 11/08/2021] [Indexed: 12/21/2022] Open
Abstract
The morbidity and mortality of autoimmune diseases (Ads) have been increasing worldwide, and the identification of novel therapeutic strategies for prevention and treatment is urgently needed. Sirtuin 1 (SIRT1), a member of the class III family of nicotinamide adenine dinucleotide (NAD+)-dependent histone deacetylases, has been reported to participate in the progression of several diseases. SIRT1 also regulates inflammation, oxidative stress, mitochondrial function, immune responses, cellular differentiation, proliferation and metabolism, and its altered functions are likely involved in Ads. Several inhibitors and activators have been shown to affect the development of Ads. SIRT1 may represent a novel therapeutic target in these diseases, and small molecules or natural products that modulate the functions of SIRT1 are potential therapeutic agents. In the present review, we summarize current studies of the biological functions of SIRT1 and its role in the pathogenesis and treatment of Ads.
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Affiliation(s)
- Pan Shen
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Xuan Deng
- Department of Nephrology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Zhe Chen
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Xin Ba
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Kai Qin
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Ying Huang
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Yao Huang
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Tingting Li
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Jiahui Yan
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
| | - Shenghao Tu
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China
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7
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Kynurenine induces T cell fat catabolism and has limited suppressive effects in vivo. EBioMedicine 2021; 74:103734. [PMID: 34875457 PMCID: PMC8652007 DOI: 10.1016/j.ebiom.2021.103734] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 11/18/2021] [Accepted: 11/21/2021] [Indexed: 01/17/2023] Open
Abstract
Background L-kynurenine is a tryptophan-derived immunosuppressive metabolite and precursor to neurotoxic anthranilate and quinolinate. We evaluated the stereoisomer D-kynurenine as an immunosuppressive therapeutic which is hypothesized to produce less neurotoxic metabolites than L-kynurenine. Methods L-/D-kynurenine effects on human and murine T cell function were examined in vitro and in vivo (homeostatic proliferation, colitis, cardiac transplant). Kynurenine effects on T cell metabolism were interrogated using [13C] glucose, glutamine and palmitate tracing. Kynurenine was measured in tissues from human and murine tumours and kynurenine-fed mice. Findings We observed that 1 mM D-kynurenine inhibits T cell proliferation through apoptosis similar to L-kynurenine. Mechanistically, [13C]-tracing revealed that co-stimulated CD4+ T cells exposed to L-/D-kynurenine undergo increased β-oxidation depleting fatty acids. Replenishing oleate/palmitate restored effector T cell viability. We administered dietary D-kynurenine reaching tissue kynurenine concentrations of 19 μM, which is close to human kidney (6 μM) and head and neck cancer (14 μM) but well below the 1 mM required for apoptosis. D-kynurenine protected Rag1–/– mice from autoimmune colitis in an aryl-hydrocarbon receptor dependent manner but did not attenuate more stringent immunological challenges such as antigen mismatched cardiac allograft rejection. Interpretation Our dietary kynurenine model achieved tissue concentrations at or above human cancer kynurenine and exhibited only limited immunosuppression. Sub-suppressive kynurenine concentrations in human cancers may limit the responsiveness to indoleamine 2,3-dioxygenase inhibition evaluated in clinical trials. Funding The study was supported by the NIH, the Else Kröner-Fresenius-Foundation, Laffey McHugh foundation, and American Society of Nephrology.
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8
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Qiu Y, Zhou X, Liu Y, Tan S, Li Y. The Role of Sirtuin-1 in Immune Response and Systemic Lupus Erythematosus. Front Immunol 2021; 12:632383. [PMID: 33981300 PMCID: PMC8110204 DOI: 10.3389/fimmu.2021.632383] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 02/19/2021] [Indexed: 12/13/2022] Open
Abstract
Systemic lupus erythematosus (SLE) is a potentially fatal multisystem inflammatory chronic disorder, the etiology and pathogenesis of which remain unclear. The loss of immune tolerance in SLE patients contributes to the production of autoantibodies that attack multiple organs and tissues, such as the skin, joints, and kidneys. Immune cells play important roles in the occurrence and progression of SLE through amplified immune responses. Sirtuin-1 (SIRT1), an NAD+-dependent histone deacetylase, has been shown to be a pivotal regulator in various physiological processes, including cell differentiation, apoptosis, metabolism, aging, and immune responses, via modulation of different signaling pathways, such as the nuclear factor κ-light-chain-enhancer of activated B cells and activator protein 1 pathways. Recent studies have provided evidence that SIRT1 could be a regulatory element in the immune system, whose altered functions are likely relevant to SLE development. This review aims to illustrate the functions of SIRT1 in different types of immune cells and the potential roles of SIRT1 in the SLE pathogenesis and its therapeutic perspectives.
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Affiliation(s)
- Yueqi Qiu
- Department of Dermatology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Xingyu Zhou
- Department of Dermatology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Yu Liu
- Department of Dermatology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Siqi Tan
- Department of Dermatology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Yaping Li
- Department of Dermatology, Second Xiangya Hospital, Central South University, Changsha, China
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9
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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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10
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Qiu L, Lai X, Wang JJ, Yeap XY, Han S, Zheng F, Lin C, Zhang Z, Procissi D, Fang D, Li L, Thorp EB, Abecassis MM, Kanwar YS, Zhang ZJ. Kidney-intrinsic factors determine the severity of ischemia/reperfusion injury in a mouse model of delayed graft function. Kidney Int 2020; 98:1489-1501. [PMID: 32822703 PMCID: PMC7814505 DOI: 10.1016/j.kint.2020.07.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 06/12/2020] [Accepted: 07/09/2020] [Indexed: 02/06/2023]
Abstract
Delayed graft function due to transplant ischemia/reperfusion injury adversely affects up to 50% of deceased-donor kidney transplant recipients. However, key factors contributing to the severity of ischemia/reperfusion injury remain unclear. Here, using a clinically relevant mouse model of delayed graft function, we demonstrated that donor genetic background and kidney-intrinsic MyD88/Trif-dependent innate immunity were key determinants of delayed graft function. Functional deterioration of kidney grafts directly corresponded with the duration of cold ischemia time. The graft dysfunction became irreversible after cold ischemia time exceeded six hours. When cold ischemia time reached four hours, kidney grafts displayed histological features reflective of delayed graft function seen in clinical kidney transplantation. Notably, kidneys of B6 mice exhibited significantly more severe histological and functional impairment than kidneys of C3H or BALB/c mice, regardless of recipient strains or alloreactivities. Furthermore, allografts of B6 mice also showed an upregulation of IL-6, neutrophil gelatinase-associated lipocalin, and endoplasmic reticulum stress genes, as well as an increased influx of host neutrophils and memory CD8 T-cells. In contrast, donor MyD88/Trif deficiency inhibited neutrophil influx and decreased the expression of IL-6 and endoplasmic reticulum stress genes, along with improved graft function and prolonged allograft survival. Thus, kidney-intrinsic factors involving genetic characteristics and innate immunity serve as critical determinants of the severity of delayed graft function. This preclinical murine model allows for further investigations of the mechanisms underlying delayed graft function.
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Affiliation(s)
- Longhui Qiu
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Xingqiang Lai
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Organ Transplant Center, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jiao-Jing Wang
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Xin Yi Yeap
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Shulin Han
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Feibo Zheng
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Charlie Lin
- Weinberg Art and Science College, Northwestern University, Evanston, Illinois, USA
| | - Zhuoli Zhang
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Daniele Procissi
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Deyu Fang
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Lin Li
- Department of Pathology and Laboratory Medicine, Cedars Sinai Medical Center, West Hollywood, California, USA
| | - Edward B Thorp
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Michael M Abecassis
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Yashpal S Kanwar
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Department of Medicine (Nephrology and Hypertension), Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Zheng J Zhang
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.
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11
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Quinn WJ, Jiao J, TeSlaa T, Stadanlick J, Wang Z, Wang L, Akimova T, Angelin A, Schäfer PM, Cully MD, Perry C, Kopinski PK, Guo L, Blair IA, Ghanem LR, Leibowitz MS, Hancock WW, Moon EK, Levine MH, Eruslanov EB, Wallace DC, Baur JA, Beier UH. Lactate Limits T Cell Proliferation via the NAD(H) Redox State. Cell Rep 2020; 33:108500. [PMID: 33326785 PMCID: PMC7830708 DOI: 10.1016/j.celrep.2020.108500] [Citation(s) in RCA: 141] [Impact Index Per Article: 35.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 10/08/2020] [Accepted: 11/18/2020] [Indexed: 12/01/2022] Open
Abstract
Immune cell function is influenced by metabolic conditions. Low-glucose, high-lactate environments, such as the placenta, gastrointestinal tract, and the tumor microenvironment, are immunosuppressive, especially for glycolysis-dependent effector T cells. We report that nicotinamide adenine dinucleotide (NAD+), which is reduced to NADH by lactate dehydrogenase in lactate-rich conditions, is a key point of metabolic control in T cells. Reduced NADH is not available for NAD+-dependent enzymatic reactions involving glyceraldehyde 3-phosphate dehydrogenase (GAPDH) and 3-phosphoglycerate dehydrogenase (PGDH). We show that increased lactate leads to a block at GAPDH and PGDH, leading to the depletion of post-GAPDH glycolytic intermediates, as well as the 3-phosphoglycerate derivative serine that is known to be important for T cell proliferation. Supplementing serine rescues the ability of T cells to proliferate in the presence of lactate-induced reductive stress. Directly targeting the redox state may be a useful approach for developing novel immunotherapies in cancer and therapeutic immunosuppression. Quinn et al. report that lactate has an acidity-independent suppressive effect on effector T cell proliferation mediated through a shift from NAD+ to NADH (lactate-induced reductive stress). This impairs glycolysis and glucose-derived serine production, which is required for effector T cell proliferation.
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Affiliation(s)
- William J Quinn
- Department of Physiology and Institute of Diabetes, Obesity, and Metabolism, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Jing Jiao
- Division of Nephrology and Department of Pediatrics, Children's Hospital of Philadelphia and University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Tara TeSlaa
- Lewis Sigler Institute for Integrative Genomics and Department of Chemistry, Princeton University, Washington Road, Princeton, NJ 08544, USA
| | - Jason Stadanlick
- Division of Thoracic Surgery, Department of Surgery, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Zhonglin Wang
- Department of Surgery, Penn Transplant Institute, Perelman School of Medicine, Children's Hospital of Philadelphia and University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Liqing Wang
- Division of Transplant Immunology, Department of Pathology and Laboratory Medicine and Biesecker Center for Pediatric Liver Disease, Children's Hospital of Philadelphia and University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Tatiana Akimova
- Division of Transplant Immunology, Department of Pathology and Laboratory Medicine and Biesecker Center for Pediatric Liver Disease, Children's Hospital of Philadelphia and University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Alessia Angelin
- Center for Mitochondrial and Epigenomic Medicine, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Patrick M Schäfer
- Center for Mitochondrial and Epigenomic Medicine, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Michelle D Cully
- Division of Nephrology and Department of Pediatrics, Children's Hospital of Philadelphia and University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Caroline Perry
- Department of Physiology and Institute of Diabetes, Obesity, and Metabolism, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Piotr K Kopinski
- Center for Mitochondrial and Epigenomic Medicine, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Lili Guo
- Penn SRP Center, Center of Excellence in Environmental Toxicology and Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Ian A Blair
- Penn SRP Center, Center of Excellence in Environmental Toxicology and Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Louis R Ghanem
- Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Michael S Leibowitz
- Division of Oncology, Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Wayne W Hancock
- Division of Transplant Immunology, Department of Pathology and Laboratory Medicine and Biesecker Center for Pediatric Liver Disease, Children's Hospital of Philadelphia and University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Edmund K Moon
- Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Matthew H Levine
- Department of Surgery, Penn Transplant Institute, Perelman School of Medicine, Children's Hospital of Philadelphia and University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Evgeniy B Eruslanov
- Division of Thoracic Surgery, Department of Surgery, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Douglas C Wallace
- Center for Mitochondrial and Epigenomic Medicine, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Joseph A Baur
- Department of Physiology and Institute of Diabetes, Obesity, and Metabolism, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Ulf H Beier
- Division of Nephrology and Department of Pediatrics, Children's Hospital of Philadelphia and University of Pennsylvania, Philadelphia, PA 19104, USA.
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12
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Rasha F, Mims BM, Castro-Piedras I, Barnes BJ, Grisham MB, Rahman RL, Pruitt K. The Versatility of Sirtuin-1 in Endocrinology and Immunology. Front Cell Dev Biol 2020; 8:589016. [PMID: 33330467 PMCID: PMC7717970 DOI: 10.3389/fcell.2020.589016] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 10/27/2020] [Indexed: 12/13/2022] Open
Abstract
Sirtuins belong to the class III family of NAD-dependent histone deacetylases (HDAC) and are involved in diverse physiological processes that range from regulation of metabolism and endocrine function to coordination of immunity and cellular responses to stress. Sirtuin-1 (SIRT1) is the most well-studied family member and has been shown to be critically involved in epigenetics, immunology, and endocrinology. The versatile roles of SIRT1 include regulation of energy sensing metabolic homeostasis, deacetylation of histone and non-histone proteins in numerous tissues, neuro-endocrine regulation via stimulation of hypothalamus-pituitary axes, synthesis and maintenance of reproductive hormones via steroidogenesis, maintenance of innate and adaptive immune system via regulation of T- and B-cell maturation, chronic inflammation and autoimmune diseases. Moreover, SIRT1 is an appealing target in various disease contexts due to the promise of pharmacological and/or natural modulators of SIRT1 activity within the context of endocrine and immune-related disease models. In this review we aim to provide a broad overview on the role of SIRT1 particularly within the context of endocrinology and immunology.
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Affiliation(s)
- Fahmida Rasha
- Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, United States
| | - Brianyell McDaniel Mims
- Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, United States
| | - Isabel Castro-Piedras
- Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, United States
| | - Betsy J. Barnes
- Laboratory of Autoimmune and Cancer Research, Center for Autoimmune Musculoskeletal and Hematopoietic Disease, The Feinstein Institutes for Medical Research, Manhasset, NY, United States
- Department of Molecular Medicine and Department of Pediatrics, Zucker School of Medicine at Hofstra-Northwell, Hempstead, NY, United States
| | - Matthew B. Grisham
- Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, United States
| | | | - Kevin Pruitt
- Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, United States
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13
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Zhao Y, Hu W, Chen P, Cao M, Zhang Y, Zeng C, Hara H, Cooper DKC, Mou L, Luan S, Gao H. Immunosuppressive and metabolic agents that influence allo‐ and xenograft survival by in vivo expansion of T regulatory cells. Xenotransplantation 2020; 27:e12640. [PMID: 32892428 DOI: 10.1111/xen.12640] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 07/06/2020] [Accepted: 08/17/2020] [Indexed: 12/23/2022]
Affiliation(s)
- Yanli Zhao
- Department of Nephrology Shenzhen Longhua District Central Hospital Affiliated Central Hospital of Shenzhen Longhua District Guangdong Medical University Shenzhen China
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center Institute of Translational Medicine Shenzhen University Health Science Center, Shenzhen University School of Medicine First Affiliated Hospital of Shenzhen UniversityShenzhen Second People’s Hospital Shenzhen China
- Department of Medical Laboratory Shenzhen Longhua District Central Hospital Affiliated Central Hospital of Shenzhen Longhua District Guangdong Medical University Shenzhen China
| | | | - Pengfei Chen
- Department of Nephrology Shenzhen Longhua District Central Hospital Affiliated Central Hospital of Shenzhen Longhua District Guangdong Medical University Shenzhen China
- Department of Medical Laboratory Shenzhen Longhua District Central Hospital Affiliated Central Hospital of Shenzhen Longhua District Guangdong Medical University Shenzhen China
| | - Mengtao Cao
- Department of Nephrology Shenzhen Longhua District Central Hospital Affiliated Central Hospital of Shenzhen Longhua District Guangdong Medical University Shenzhen China
- Department of Medical Laboratory Shenzhen Longhua District Central Hospital Affiliated Central Hospital of Shenzhen Longhua District Guangdong Medical University Shenzhen China
| | - Yingwei Zhang
- Department of Nephrology Shenzhen Longhua District Central Hospital Affiliated Central Hospital of Shenzhen Longhua District Guangdong Medical University Shenzhen China
| | - Changchun Zeng
- Department of Medical Laboratory Shenzhen Longhua District Central Hospital Affiliated Central Hospital of Shenzhen Longhua District Guangdong Medical University Shenzhen China
| | - Hidetaka Hara
- Xenotransplantation Program Department of Surgery University of Alabama at Birmingham Birmingham AL USA
| | - David K. C. Cooper
- Xenotransplantation Program Department of Surgery University of Alabama at Birmingham Birmingham AL USA
| | - Lisha Mou
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center Institute of Translational Medicine Shenzhen University Health Science Center, Shenzhen University School of Medicine First Affiliated Hospital of Shenzhen UniversityShenzhen Second People’s Hospital Shenzhen China
| | - Shaodong Luan
- Department of Nephrology Shenzhen Longhua District Central Hospital Affiliated Central Hospital of Shenzhen Longhua District Guangdong Medical University Shenzhen China
| | - Hanchao Gao
- Department of Nephrology Shenzhen Longhua District Central Hospital Affiliated Central Hospital of Shenzhen Longhua District Guangdong Medical University Shenzhen China
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center Institute of Translational Medicine Shenzhen University Health Science Center, Shenzhen University School of Medicine First Affiliated Hospital of Shenzhen UniversityShenzhen Second People’s Hospital Shenzhen China
- Department of Medical Laboratory Shenzhen Longhua District Central Hospital Affiliated Central Hospital of Shenzhen Longhua District Guangdong Medical University Shenzhen China
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14
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Beier UH, Hartung EA, Concors S, Hernandez PT, Wang Z, Perry C, Baur JA, Denburg MR, Hancock WW, Gade TP, Levine MH. Tissue metabolic profiling shows that saccharopine accumulates during renal ischemic-reperfusion injury, while kynurenine and itaconate accumulate in renal allograft rejection. Metabolomics 2020; 16:65. [PMID: 32367163 PMCID: PMC7450764 DOI: 10.1007/s11306-020-01682-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 04/17/2020] [Indexed: 11/26/2022]
Abstract
To examine metabolic differences between renal allograft acute cellular rejection (ACR) and ischemic-reperfusion injury (IRI), we transplanted MHC-mismatched kidneys and induced 28 min warm-IRI, and collected the ACR and IRI kidneys as well as their respective native and collateral control kidneys. We extracted metabolites from the kidney tissues and found the lysine catabolite saccharopine 12.5-fold enriched in IRI kidneys, as well as the immunometabolites itaconate and kynurenine in ACR kidneys. Saccharopine accumulation is known to be toxic to mitochondria and may contribute to IRI pathophysiology, while itaconate and kynurenine may be reflective of counterregulatory responses to immune activation in ACR.
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Affiliation(s)
- Ulf H Beier
- Division of Nephrology, Department of Pediatrics, Children's Hospital of Philadelphia and Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Erum A Hartung
- Division of Nephrology, Department of Pediatrics, Children's Hospital of Philadelphia and Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Seth Concors
- Department of Transplant Surgery, Penn Transplant Institute, Perelman School of Medicine, Children's Hospital of Philadelphia and University of Pennsylvania, 3400 Spruce Street, 2 Ravdin Courtyard, Philadelphia, PA, 19104, USA
| | - Paul T Hernandez
- Department of Transplant Surgery, Penn Transplant Institute, Perelman School of Medicine, Children's Hospital of Philadelphia and University of Pennsylvania, 3400 Spruce Street, 2 Ravdin Courtyard, Philadelphia, PA, 19104, USA
| | - Zhonglin Wang
- Department of Transplant Surgery, Penn Transplant Institute, Perelman School of Medicine, Children's Hospital of Philadelphia and University of Pennsylvania, 3400 Spruce Street, 2 Ravdin Courtyard, Philadelphia, PA, 19104, USA
| | - Caroline Perry
- Department of Physiology and Institute of Diabetes, Obesity, and Metabolism, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Joseph A Baur
- Department of Physiology and Institute of Diabetes, Obesity, and Metabolism, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Michelle R Denburg
- Division of Nephrology, Department of Pediatrics, Children's Hospital of Philadelphia and Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Wayne W Hancock
- Division of Transplant Immunology, Department of Pathology and Laboratory Medicine, Biesecker Center for Pediatric Liver Disease, Children's Hospital of Philadelphia and University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Terence P Gade
- Department of Radiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, 19104, USA
- Department of Cancer Biology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Matthew H Levine
- Department of Transplant Surgery, Penn Transplant Institute, Perelman School of Medicine, Children's Hospital of Philadelphia and University of Pennsylvania, 3400 Spruce Street, 2 Ravdin Courtyard, Philadelphia, PA, 19104, USA.
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15
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Sirtuin 1: A Dilemma in Transplantation. J Transplant 2020; 2020:9012980. [PMID: 32373350 PMCID: PMC7196964 DOI: 10.1155/2020/9012980] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 03/15/2020] [Accepted: 03/20/2020] [Indexed: 12/30/2022] Open
Abstract
Sirtuin 1, a member of sirtuin family of histone deacetylase enzymes, has been implicated in a variety of physiologic and pathologic events, including energy metabolism, cell survival, and age-related alterations. In view of the anti-inflammatory properties of sirtuin 1 along with its protective role in ischemia reperfusion injury, it might be considered as contributing to the promotion of transplantation outcome. However, the potential ability of sirtuin 1 to induce malignancies raises some concerns about its overexpression in clinic. Moreover, despite the findings of sirtuin 1 implication in thymic tolerance induction and T regulatory (Treg) cells survival, there is also evidence for its involvement in Treg suppression and in T helper 17 cells differentiation. The identification of sirtuin 1 natural and synthetic activators leads to the proposal of sirtuin 1 as an eligible target for clinical interventions in transplantation. All positive and negative consequences of sirtuin 1 overactivation/overexpression in the allograft should therefore be studied thoroughly. Herein, we summarize previous findings concerning direct and indirect influences of sirtuin 1 manipulation on transplantation.
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Histone Deacetylation Inhibitors as Modulators of Regulatory T Cells. Int J Mol Sci 2020; 21:ijms21072356. [PMID: 32235291 PMCID: PMC7177531 DOI: 10.3390/ijms21072356] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 03/12/2020] [Accepted: 03/26/2020] [Indexed: 02/07/2023] Open
Abstract
Regulatory T cells (Tregs) are important mediators of immunological self-tolerance and homeostasis. Being cluster of differentiation 4+Forkhead box protein3+ (CD4+FOXP3+), these cells are a subset of CD4+ T lymphocytes and can originate from the thymus (tTregs) or from the periphery (pTregs). The malfunction of CD4+ Tregs is associated with autoimmune responses such as rheumatoid arthritis (RA), multiple sclerosis (MS), type 1 diabetes (T1D), inflammatory bowel diseases (IBD), psoriasis, systemic lupus erythematosus (SLE), and transplant rejection. Recent evidence supports an opposed role in sepsis. Therefore, maintaining functional Tregs is considered as a therapy regimen to prevent autoimmunity and allograft rejection, whereas blocking Treg differentiation might be favorable in sepsis patients. It has been shown that Tregs can be generated from conventional naïve T cells, called iTregs, due to their induced differentiation. Moreover, Tregs can be effectively expanded in vitro based on blood-derived tTregs. Taking into consideration that the suppressive role of Tregs has been mainly attributed to the expression and function of the transcription factor Foxp3, modulating its expression and binding to the promoter regions of target genes by altering the chromatin histone acetylation state may turn out beneficial. Hence, we discuss the role of histone deacetylation inhibitors as epigenetic modulators of Tregs in this review in detail.
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17
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Ma K, Lu N, Zou F, Meng FZ. Sirtuins as novel targets in the pathogenesis of airway inflammation in bronchial asthma. Eur J Pharmacol 2019; 865:172670. [PMID: 31542484 DOI: 10.1016/j.ejphar.2019.172670] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 09/03/2019] [Accepted: 09/18/2019] [Indexed: 12/11/2022]
Abstract
Sirtuins are NAD-dependent class III histone deacetylase, which modulate the epigenetic changes to influence the functions in normal and diseased conditions. Preclinical studies have described an increase in the levels of sirtuin 2 and decrease in the levels of sirtuin 6 in the lungs. Sirtuin 2 exerts proinflammatory actions and hence, its blockers reduce the airway inflammation and symptoms of asthma. On the other hand, sirtuin 6 is anti-inflammatory and its activators produce beneficial actions in asthma. The beneficial effects of sirtuin 6 have been attributed to decrease in acetylation of transcriptional factor GATA3 in the T cells, which is associated with decrease in the TH2 immune response. However, there seems to be dual role of sirtuin 1 in airway inflammation as its proinflammatory as well as anti-inflammatory actions have been described in asthma. The anti-inflammatory actions of sirtuin 1 have been attributed to decrease in acetylation of GATA3 and inhibition of Akt/NF-kappaB signaling. On the other hand, proinflammatory actions of sirtuin 1 have been attributed to increase in the expression of HIF-1α and VEGF along with repression of PPAR-γ activity. The present review discusses the role of different sirtuins in the pathogenesis of bronchial asthma. Moreover, it also discusses sirtuin-triggered signaling pathways that may contribute in modulating the disease state of bronchial asthma.
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Affiliation(s)
- Ke Ma
- Department of Pediatrics, The First Hospital of Jilin University, Changchun, Jilin, 130021, China.
| | - Na Lu
- Department of Pediatrics, The First Hospital of Jilin University, Changchun, Jilin, 130021, China.
| | - Fei Zou
- Department of Pediatrics, The First Hospital of Jilin University, Changchun, Jilin, 130021, China.
| | - Fan-Zheng Meng
- Department of Pediatrics, The First Hospital of Jilin University, Changchun, Jilin, 130021, China.
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18
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Bazyluk A, Malyszko J, Hryszko T, Zbroch E. State of the art - sirtuin 1 in kidney pathology - clinical relevance. Adv Med Sci 2019; 64:356-364. [PMID: 31125865 DOI: 10.1016/j.advms.2019.04.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 11/17/2018] [Accepted: 04/19/2019] [Indexed: 01/19/2023]
Abstract
Sirtuins represent a group of nicotinamide adenine dinucleotide dependent histone deacetylases, which regulates various biological pathways by promoting chromatin silencing and transcriptional repression. Therefore, they are linked to cellular energy metabolism, mitochondrial biogenesis, stress response, apoptosis, inflammation and fibrosis. Since sirtuin 1 became a promising candidate for targeted therapies of numerous conditions, researchers have been investigating its activator. As for now, natural agents and antidiabetic drug - metformin, have been found to activate sirtuin 1. Sirtuin 1 is able to improve kidney outcomes by direct impact on kidney cells, regulation of non-specific processes generally involved in pathogenesis of age-dependent and metabolic disorders and improvement of the comorbid diseases. This review discusses the state of the art knowledge on the role of sirtuin 1 on kidney pathology.
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19
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Nijhuis L, Peeters JGC, Vastert SJ, van Loosdregt J. Restoring T Cell Tolerance, Exploring the Potential of Histone Deacetylase Inhibitors for the Treatment of Juvenile Idiopathic Arthritis. Front Immunol 2019; 10:151. [PMID: 30792714 PMCID: PMC6374297 DOI: 10.3389/fimmu.2019.00151] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 01/17/2019] [Indexed: 12/24/2022] Open
Abstract
Juvenile Idiopathic Arthritis (JIA) is characterized by a loss of immune tolerance. Here, the balance between the activity of effector T (Teff) cells and regulatory T (Treg) cells is disturbed resulting in chronic inflammation in the joints. Presently, therapeutic strategies are predominantly aimed at suppressing immune activation and pro-inflammatory effector mechanisms, ignoring the opportunity to also promote tolerance by boosting the regulatory side of the immune balance. Histone deacetylases (HDACs) can deacetylate both histone and non-histone proteins and have been demonstrated to modulate epigenetic regulation as well as cellular signaling in various cell types. Importantly, HDACs are potent regulators of both Teff cell and Treg cell function and can thus be regarded as attractive therapeutic targets in chronic inflammatory arthritis. HDAC inhibitors (HDACi) have proven therapeutic potential in the cancer field, and are presently being explored for their potential in the treatment of autoimmune diseases. Specific HDACi have already been demonstrated to reduce the secretion of pro-inflammatory cytokines by Teff cells, and promote Treg numbers and suppressive capacity in vitro and in vivo. In this review, we outline the role of the different classes of HDACs in both Teff cell and Treg cell function. Furthermore, we will review the effect of different HDACi on T cell tolerance and explore their potential as a therapeutic strategy for the treatment of oligoarticular and polyarticular JIA.
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Affiliation(s)
- Lotte Nijhuis
- Laboratory of Translational Immunology, Department of Pediatric Immunology & Rheumatology, University Medical Center Utrecht, University of Utrecht, Utrecht, Netherlands
| | - Janneke G C Peeters
- Laboratory of Translational Immunology, Department of Pediatric Immunology & Rheumatology, University Medical Center Utrecht, University of Utrecht, Utrecht, Netherlands
| | - Sebastiaan J Vastert
- Laboratory of Translational Immunology, Department of Pediatric Immunology & Rheumatology, University Medical Center Utrecht, University of Utrecht, Utrecht, Netherlands
| | - Jorg van Loosdregt
- Laboratory of Translational Immunology, Department of Pediatric Immunology & Rheumatology, University Medical Center Utrecht, University of Utrecht, Utrecht, Netherlands
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20
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Chadha S, Wang L, Hancock WW, Beier UH. Sirtuin-1 in immunotherapy: A Janus-headed target. J Leukoc Biol 2019; 106:337-343. [PMID: 30605226 DOI: 10.1002/jlb.2ru1118-422r] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 12/13/2018] [Accepted: 12/16/2018] [Indexed: 12/16/2022] Open
Abstract
Sirtuin-1 (Sirt1), a member of the NAD-dependent sirtuin family of histone/protein deacetylases (HDAC), is an important target for immunotherapy due to its role in deacetylating the transcription factors Foxp3 and thymic retinoid acid receptor related orphan receptor gamma (RORγt). Sirt1 inhibition can increase Foxp3 acetylation and promote the production and functions of Foxp3+ T-regulatory (Treg) cells, whereas the acetylation of RORγt decreases its transcriptional activity DNA binding and decreases the differentiation of proinflammatory Th17 cells. Pharmacologic inhibitors of Sirt1 increase allograft survival and decrease autoimmune colitis and experimental allergic encephalomyelitis. However, in contrast to its role in T cells, Sirt1 has anti-inflammatory effects in myeloid cells, and, context dependent, in Th17 cells. Here, inhibition of Sirt1 can have proinflammatory effects. In addition to effects arising from the central role of Sirt1 in cellular metabolism and NAD-dependent reactions, such proinflammatory effects further complicate the potential of Sirt1 for therapeutic immunosuppression. This review aims to reconcile the opposing literature on pro- and anti-inflammatory effects of Sirt1, provides an overview of the role of Sir1 in the immune system, and discusses the pros and cons associated with inhibiting Sirt1 for control of inflammation and immune responses.
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Affiliation(s)
- Sakshum Chadha
- Division of Nephrology, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Liqing Wang
- Division of Transplant Immunology, Department of Pathology and Laboratory Medicine, and Biesecker Center for Pediatric Liver Disease, Children's Hospital of Philadelphia and University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Wayne W Hancock
- Division of Transplant Immunology, Department of Pathology and Laboratory Medicine, and Biesecker Center for Pediatric Liver Disease, Children's Hospital of Philadelphia and University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Ulf H Beier
- Division of Nephrology, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
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21
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Zhang D, Qiu X, Li J, Zheng S, Li L, Zhao H. MiR-23a-3p-regulated abnormal acetylation of FOXP3 induces regulatory T cell function defect in Graves’ disease. Biol Chem 2018; 400:639-650. [PMID: 30391932 DOI: 10.1515/hsz-2018-0343] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Accepted: 10/26/2018] [Indexed: 01/25/2023]
Abstract
Abstract
This study aims to investigate the mechanism of miR-23a-3p in regulating Treg dysfunction in Graves’ disease (GD). The percentage of Treg cells and interleukin (IL)-17+ T cells were determined by flow cytometry. The expression of forkhead box P3 (FOXP3), sirtuin 1 (SIRT1), RAR-related orphan receptor gamma t (RORγt) and miR-23a-3p was analyzed by quantitative reverse transcription polymerase chain reaction (qRT-PCR) or Western blot. CD4+ T cells were treated with SIRT1 specific inhibitor EX-527 or left untreated. MiR-23a-3p mimic or inhibitor were transfected into CD4+ T cells. Acetylation expression of FOXP3 was analyzed by immunoprecipitation. The suppressive function of Treg was analyzed by the carboxyfluorescein succinimidyl ester (CFSE) assay. The results showed that GD patients have significantly less Treg cells and more IL-17+ T cells. FOXP3 and miR-23a-3p were significantly down-regulated meanwhile SIRT1 and RORγt were up-regulated in GD patients. FOXP3 acetylation level of the GD group was lower than that of control groups. After EX-527 treatment, the percentage of Treg cells, expression and acetylation level of FOXP3 were significantly increased in the GD group. GD Tregs exhibited weaker suppressive activity, miR-23a-3p mimic suppressed SIRT1 expression and suppressive-activity of Tregs whereas it promoted the expression and acetylation level of FOXP3 in the GD group. Our findings suggest that the Treg function defect in GD patients is mediated by the abnormal acetylation of FOXP3, which is regulated by miR-23a-3p via targeting SIRT1.
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Affiliation(s)
- Danhua Zhang
- Department of General surgery, The First Affiliated Hospital of Zhengzhou University, No. 41 Jianshe Road, Erqi District, Zhengzhou 450052, Henan Province, China
| | - Xinguang Qiu
- Department of General surgery, The First Affiliated Hospital of Zhengzhou University, No. 41 Jianshe Road, Erqi District, Zhengzhou 450052, Henan Province, China
| | - Jianhua Li
- Department of General surgery, The First Affiliated Hospital of Zhengzhou University, No. 41 Jianshe Road, Erqi District, Zhengzhou 450052, Henan Province, China
| | - Shouhua Zheng
- Department of General surgery, The First Affiliated Hospital of Zhengzhou University, No. 41 Jianshe Road, Erqi District, Zhengzhou 450052, Henan Province, China
| | - Liwen Li
- Department of General surgery, The First Affiliated Hospital of Zhengzhou University, No. 41 Jianshe Road, Erqi District, Zhengzhou 450052, Henan Province, China
| | - Hongchao Zhao
- Department of General surgery, The First Affiliated Hospital of Zhengzhou University, No. 41 Jianshe Road, Erqi District, Zhengzhou 450052, Henan Province, China
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22
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Lieber AD, Beier UH, Xiao H, Wilkins BJ, Jiao J, Li XS, Schugar RC, Strauch CM, Wang Z, Brown JM, Hazen SL, Bokulich NA, Ruggles KV, Akimova T, Hancock WW, Blaser MJ. Loss of HDAC6 alters gut microbiota and worsens obesity. FASEB J 2018; 33:1098-1109. [PMID: 30102568 DOI: 10.1096/fj.201701586r] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Alterations in gut microbiota are known to affect intestinal inflammation and obesity. Antibiotic treatment can affect weight gain by elimination of histone deacetylase (HDAC) inhibitor-producing microbes, which are anti-inflammatory by augmenting regulatory T (Treg) cells. We asked whether mice that lack HDAC6 and have potent suppressive Treg cells are protected from microbiota-induced accelerated weight gain. We crossed wild-type and HDAC6-deficient mice and subjected the offspring to perinatal penicillin, inducing weight gain via microbiota disturbance. We observed that male HDAC6-deficient mice were not protected and developed profoundly accelerated weight gain. The antibiotic-exposed HDAC6-deficient mice showed a mixed immune phenotype with increased CD4+ and CD8+ T-cell activation yet maintained the enhanced Treg cell-suppressive function phenotype characteristic of HDAC6-deficient mice. 16S rRNA sequencing of mouse fecal samples reveals that their microbiota diverged with time, with HDAC6 deletion altering microbiome composition. On a high-fat diet, HDAC6-deficient mice were depleted in representatives of the S24-7 family and Lactobacillus but enriched with Bacteroides and Parabacteroides; these changes are associated with obesity. Our findings further our understanding of the influence of HDACs on microbiome composition and are important for the development of HDAC6 inhibitors in the treatment of human diseases.-Lieber, A. D., Beier, U. H., Xiao, H., Wilkins, B. J., Jiao, J., Li, X. S., Schugar, R. C., Strauch, C. M., Wang, Z., Brown, J. M., Hazen, S. L., Bokulich, N. A., Ruggles, K. V., Akimova, T., Hancock, W. W., Blaser, M. J. Loss of HDAC6 alters gut microbiota and worsens obesity.
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Affiliation(s)
- Arnon D Lieber
- Department of Medicine New York University School of Medicine (NYUSM), New York, New York, USA.,Department of Microbiology, New York University School of Medicine (NYUSM), New York, New York, USA
| | - Ulf H Beier
- Division of Nephrology, Department of Pediatrics University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Haiyan Xiao
- Division of Nephrology, Department of Pediatrics University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Benjamin J Wilkins
- Division of Anatomic Pathology, Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jing Jiao
- Division of Nephrology, Department of Pediatrics University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Xinmin S Li
- Department of Cellular and Molecular Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Rebecca C Schugar
- Department of Cellular and Molecular Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Christopher M Strauch
- Department of Cellular and Molecular Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Zeneng Wang
- Department of Cellular and Molecular Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - J Mark Brown
- Department of Cellular and Molecular Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Stanley L Hazen
- Department of Cellular and Molecular Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Nicholas A Bokulich
- Department of Medicine New York University School of Medicine (NYUSM), New York, New York, USA.,Department of Microbiology, New York University School of Medicine (NYUSM), New York, New York, USA
| | - Kelly V Ruggles
- Applied Bioinformatics Laboratories, New York University School of Medicine (NYUSM), New York, New York, USA.,Division of Translational Medicine, Department of Medicine, New York University School of Medicine (NYUSM), New York, New York, USA
| | - Tatiana Akimova
- Division of Transplant Immunology, Department of Pathology and Laboratory Medicine, Biesecker Center for Pediatric Liver Disease, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Wayne W Hancock
- Division of Transplant Immunology, Department of Pathology and Laboratory Medicine, Biesecker Center for Pediatric Liver Disease, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Martin J Blaser
- Department of Medicine New York University School of Medicine (NYUSM), New York, New York, USA.,Department of Microbiology, New York University School of Medicine (NYUSM), New York, New York, USA.,New York Harbor Department of Veterans Affairs Medical Center, New York, New York, USA
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Wang L, Beier UH, Akimova T, Dahiya S, Han R, Samanta A, Levine MH, Hancock WW. Histone/protein deacetylase inhibitor therapy for enhancement of Foxp3+ T-regulatory cell function posttransplantation. Am J Transplant 2018; 18:1596-1603. [PMID: 29603600 PMCID: PMC6035084 DOI: 10.1111/ajt.14749] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 03/20/2018] [Accepted: 03/22/2018] [Indexed: 01/25/2023]
Abstract
T-regulatory (Treg) cells are like other cells present throughout the body in being subject to biochemical modifications in response to extracellular signals. An important component of these responses involves changes in posttranslational modifications (PTMs) of histones and many nonhistone proteins, including phosphorylation/dephosphorylation, ubiquitination/deubiquitination, and acetylation/deacetylation. Foxp3, the key transcription factor of Tregs, is constantly being rapidly turned over, and a number of these PTMs determine its level of expression and activity. Of interest in the transplant setting, modulation of the acetylation or deacetylation of key lysine residues in Foxp3 can promote the stability and function, leading to increased Treg production and increased Treg suppressive activity. This mini-review focuses on recent data concerning the roles that histone/protein deacetylases (HDACs) play in control of Treg function, and how small molecule HDAC inhibitors can be used to promote Treg-dependent allograft survival in experimental models. These data are discussed in the light of increasing interest in the identification and clinical evaluation of isoform-selective HDAC inhibitors, and their potential application as tools to modulate Foxp3+ Treg cell numbers and function in transplant recipients.
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Affiliation(s)
- L. Wang
- Division of Transplant Immunology, Pathology and Laboratory Medicine, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - U. H. Beier
- Division of Nephrology, Department of Pediatrics, Children's Hospital of Philadelphia and University of Pennsylvania, Philadelphia, PA 19104, USA
| | - T. Akimova
- Division of Transplant Immunology, Pathology and Laboratory Medicine, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA,Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - S. Dahiya
- Division of Transplant Immunology, Pathology and Laboratory Medicine, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - R. Han
- Division of Transplant Immunology, Pathology and Laboratory Medicine, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - A. Samanta
- Division of Transplant Immunology, Pathology and Laboratory Medicine, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - M. H. Levine
- Division of Transplant Surgery, Department of Surgery, University of Pennsylvania, and Department of Surgery, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - W. W. Hancock
- Division of Transplant Immunology, Pathology and Laboratory Medicine, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA,Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
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Xia Y, Deng J, Zhou Q, Shao X, Yang X, Sha M, Zou H. Expression and significance of Sirt1 in renal allografts at the early stage of chronic renal allograft dysfunction. Transpl Immunol 2018; 48:18-25. [DOI: 10.1016/j.trim.2018.02.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 02/11/2018] [Accepted: 02/12/2018] [Indexed: 02/07/2023]
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25
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Jiang H, Xin S, Yan Y, Lun Y, Yang X, Zhang J. Abnormal acetylation of FOXP3 regulated by SIRT-1 induces Treg functional deficiency in patients with abdominal aortic aneurysms. Atherosclerosis 2018. [DOI: 10.1016/j.atherosclerosis.2018.02.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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26
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Yang X, Lun Y, Jiang H, Liu X, Duan Z, Xin S, Zhang J. SIRT1-Regulated Abnormal Acetylation of FOXP3 Induces Regulatory T-Cell Function Defect in Hashimoto's Thyroiditis. Thyroid 2018; 28:246-256. [PMID: 29336238 DOI: 10.1089/thy.2017.0286] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
BACKGROUND Hashimoto's thyroiditis (HT) is an autoimmune thyroid disease characterized by low expression of transcription factor Forkhead Box P3 (FOXP3) and functional deficiency of a cluster of differentiation regulatory T cells (Tregs). This study aimed to investigate the mechanism of Treg dysfunction in HT. METHODS The number of CD4+CD25+FOXP3+ T cells was determined by flow cytometry. Expression of FOXP3 and Sirtuin type 1 (SIRT1) was evaluated by Western blot analysis. Acetylation of FOXP3 was analyzed by immunoprecipitation and Western blot analysis. The suppressive function of Treg was analyzed by the 5,6-carboxyfluorescein diacetate succinimidyl ester (CFSE) assay. RESULTS The percentage of CD4+CD25+FOXP3+ T cells, expression of FOXP3, and FOXP3 acetylation level in the HT group were significantly lower than in the control groups. Conversely, SIRT1 expression was significantly higher in the HT group than in the other two groups. After Ex-527 treatment, the CD4+CD25+FOXP3+ T cells percentage, FOXP3 expression, and FOXP3 acetylation level in the HT group were significantly increased. HT Tregs exhibited less suppressive activity, but Ex-527 treatment significantly increased their suppressive activity. CONCLUSIONS The findings demonstrate that the reduced FOXP3 expression level and Treg function defect in HT patients are regulated by SIRT1-mediated abnormal FOXP3 acetylation. Ex-527 may upregulate the FOXP3 acetylation level and subsequently increase the number and suppressive function of Treg cells.
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Affiliation(s)
- Xiao Yang
- Department of Vascular Surgery, The First Hospital of China Medical University , Shenyang, P.R. China
| | - Yu Lun
- Department of Vascular Surgery, The First Hospital of China Medical University , Shenyang, P.R. China
| | - Han Jiang
- Department of Vascular Surgery, The First Hospital of China Medical University , Shenyang, P.R. China
| | - Xun Liu
- Department of Vascular Surgery, The First Hospital of China Medical University , Shenyang, P.R. China
| | - Zhiquan Duan
- Department of Vascular Surgery, The First Hospital of China Medical University , Shenyang, P.R. China
| | - Shijie Xin
- Department of Vascular Surgery, The First Hospital of China Medical University , Shenyang, P.R. China
| | - Jian Zhang
- Department of Vascular Surgery, The First Hospital of China Medical University , Shenyang, P.R. China
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Zhang Q, Dai Y, Cai Z, Mou L. HDAC Inhibitors: Novel Immunosuppressants for Allo- and Xeno- Transplantation. ChemistrySelect 2018. [DOI: 10.1002/slct.201702295] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Qing Zhang
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center; Institute of Translational Medicine, Shenzhen Second People's Hospital; Sungang Road 3002, Futian District, Shenzhen Guangdong China
| | - Yifan Dai
- Department Jiangsu Key Laboratory of Xenotransplantation; Nanjing Medical University; Nanjing, Jiangsu 210029 China
| | - Zhiming Cai
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center; Institute of Translational Medicine, Shenzhen Second People's Hospital; Sungang Road 3002, Futian District, Shenzhen Guangdong China
| | - Lisha Mou
- Shenzhen Xenotransplantation Medical Engineering Research and Development Center; Institute of Translational Medicine, Shenzhen Second People's Hospital; Sungang Road 3002, Futian District, Shenzhen Guangdong China
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28
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Chun P. Therapeutic effects of histone deacetylase inhibitors on kidney disease. Arch Pharm Res 2017; 41:162-183. [PMID: 29230688 DOI: 10.1007/s12272-017-0998-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 11/26/2017] [Indexed: 12/12/2022]
Abstract
Increasing evidence has shown the involvement of histone deacetylases (HDACs) in the development and progression of various renal diseases, highlighting its inhibition as a promising therapeutic strategy to prevent kidney diseases. Accordingly, numerous studies have shown that HDAC inhibitors protect the kidneys from various diseases through their effects on multiple pathways, such as suppression of transforming growth factor-β signaling pathway and nuclear factor-κB signaling pathways, augmentation of apoptosis, and inhibition of angiogenesis. To develop more effective and less toxic isoform-selective HDAC inhibitors and further improve clinical outcomes, it is necessary to identify and understand the mechanisms involved in the pathogenesis and progression of renal diseases. This review focuses on the roles of HDAC inhibitors and the mechanisms involved in their therapeutic effects in experimental models of kidney diseases including glomerulosclerosis, tubulointerstitial fibrosis, glomerular and tubulointerstitial inflammation, lupus nephritis, polycystic kidney disease, and renal cell carcinoma (RCC).
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Affiliation(s)
- Pusoon Chun
- College of Pharmacy and Inje Institute of Pharmaceutical Sciences and Research, Inje University, 197 Inje-ro, Gimhae, Gyeongnam, 50834, Republic of Korea.
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Yang X, Wei J, He Y, Jing T, Li Y, Xiao Y, Wang B, Wang W, Zhang J, Lin R. SIRT1 inhibition promotes atherosclerosis through impaired autophagy. Oncotarget 2017; 8:51447-51461. [PMID: 28881659 PMCID: PMC5584260 DOI: 10.18632/oncotarget.17691] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 04/24/2017] [Indexed: 11/25/2022] Open
Abstract
SIRT1, a highly conserved NAD+-dependent protein deacetylase, plays a pivotal role in the pathogenesis and therapy of atherosclerosis (AS). The aim of this study is to investigate the potential effects of SIRT1 on AS in ApoE-/- mice and the underlying mechanisms of autophagy in an ox-LDL-stimulated human monocyte cell line, THP-1. In vivo, the accelerated atherosclerotic progression of mice was established by carotid collar placement; then, mice were treated for 4 weeks with a SIRT1-specific inhibitor, EX-527. The atherosclerotic lesion size of EX-527-treated mice was greatly increased compared to that of the mice in the control group. Immunostaining protocols confirmed that the inhibition of SIRT1 during plaque initiation and progression enhanced the extent of intraplaque macrophage infiltration and impaired the autophagy process. In vitro cultured THP-1 macrophages exposed to ox-LDL were utilized to study the link between the SIRT1 function, autophagy flux, pro-inflammatory cytokine secretion, and foam cell formation using different methods. Our data showed that ox-LDL markedly suppressed SIRT1 protein expression and the autophagy level, while it elevated the MCP-1 production and lipid uptake. Additionally, the application of the SIRT1 inhibitor EX-527 or SIRT1 siRNA further attenuated ox-LDL-induced autophagy inhibition. In conclusion, our results show that the inhibition of SIRT1 promoted atherosclerotic plaque development in ApoE-/- mice by increasing the MCP-1 expression and macrophage accumulation. In particular, we demonstrate that blocking SIRT1 can exacerbate the acetylation of key autophagy machinery, the Atg5 protein, which further regulates the THP-1 macrophage-derived foam cell formation that is triggered by ox-LDL.
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Affiliation(s)
- Xiaofeng Yang
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, Shaanxi, P. R. China
| | - Jingyuan Wei
- Liaoning Province Academy of Analytic Science, Shenyang 110015, Liaoning, P. R. China
| | - Yanhao He
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, Shaanxi, P. R. China
| | - Ting Jing
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, Shaanxi, P. R. China
| | - Yanxiang Li
- Taizhou Polytechnic College, Taizhou 225300, Jiangsu, P. R. China
| | - Yunfang Xiao
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, Shaanxi, P. R. China
| | - Bo Wang
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, Shaanxi, P. R. China
| | - Weirong Wang
- Laboratory Animal Center, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, P. R. China
| | - Jiye Zhang
- School of Pharmacology, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, P. R. China
| | - Rong Lin
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, Shaanxi, P. R. China
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Fairchild RL. Juicing Tregs in situ to improve kidney allograft outcomes. Kidney Int 2016; 89:976-978. [PMID: 27083272 DOI: 10.1016/j.kint.2016.01.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Accepted: 01/28/2016] [Indexed: 10/21/2022]
Abstract
Targeted deletion of the sirtuin-1, Sirt-1, gene in mouse T cells results in enhanced CD4(+) T regulatory cell function. When these mice are used as kidney allograft recipients, this deletion confers marked improvements in allograft function and survival with the development of donor-specific nonresponsiveness. Similar kidney allograft outcomes are produced in wild-type recipients treated with pharmacologic Sirt-1 inhibitors. These studies suggest a novel strategy for enhancing the immunosuppressive function of Tregs to improve graft outcomes in kidney transplant patients.
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Affiliation(s)
- Robert L Fairchild
- Department of Immunology and the Glickman Urological Institute, Cleveland Clinic, Cleveland, OH, USA.
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