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Hu W, Shawn Hu S, Zhu S, Peng W, Badovinac VP, Zang C, Zhao X, Xue HH. Hdac1 as an early determinant of intermediate-exhausted CD8 + T cell fate in chronic viral infection. Proc Natl Acad Sci U S A 2025; 122:e2502256122. [PMID: 40333757 DOI: 10.1073/pnas.2502256122] [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: 01/31/2025] [Accepted: 04/08/2025] [Indexed: 05/09/2025] Open
Abstract
The exhausted CD8+ T (TEX) cells consist of distinct subsets including Tcf1+ stem-like, Tcf1-Cx3cr1+ intermediate (TEX-int) and Tcf1-Cx3cr1- terminally exhausted cells; yet, epigenetic determinants of TEX subset differentiation remain incompletely understood. Using chronic viral infection, we show that histone deacetylase 1 (Hdac1) was specifically required for the formation of antigen-specific TEX-int cells at the effector phase of responses. Single-cell transcriptomics validated that Hdac1 deficiency depleted TEX-int cells and revealed that Hdac1 was critical for positive regulation of TEX-int-characteristic genes, including Cx3cr1, Cxcr6, and Klf2. Furthermore, profiling chromatin accessibility landscape in TEX subsets demonstrated that loss of Hdac1 resulted in a prevalent increase in chromatin open state, as evidently observed at the exhaustion program genes, which were linked to induced expression of exhaustion-inducing Tox transcription factor, PD1 and Lag3 coinhibitory receptors in TEX cells. Hdac1 thus has dual regulatory functions: promoting TEX-int cell fate and preventing excessive activation of the exhaustion program to curtail uncontrolled virus replication.
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Affiliation(s)
- Wei Hu
- Center for Discovery and Innovation, Hackensack University Medical Center, Nutley, NJ 07110
| | - Shengen Shawn Hu
- Department of Genome Sciences and University of Virginia Comprehensive Cancer Center, University of Virginia, Charlottesville, VA 22908
| | - Shaoqi Zhu
- Department of Physics, The George Washington University, Washington, DC 20052
- Molecular Cancer Research Center, School of Medicine, Sun Yat-sen University, Shenzhen 518107, Guangdong, China
| | - Weiqun Peng
- Department of Physics, The George Washington University, Washington, DC 20052
| | | | - Chongzhi Zang
- Department of Genome Sciences and University of Virginia Comprehensive Cancer Center, University of Virginia, Charlottesville, VA 22908
| | - Xudong Zhao
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Hai-Hui Xue
- Center for Discovery and Innovation, Hackensack University Medical Center, Nutley, NJ 07110
- Division of Research and Development, New Jersey Veterans Affairs Health Care System, East Orange, NJ 07018
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2
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Yang Y, Wang X, Li M, Wang S, Wang H, Chen Q, Lu S. Identification of potential obese-specific biomarkers and pathways associated with abdominal subcutaneous fat deposition in pig using a comprehensive bioinformatics strategy. PeerJ 2024; 12:e17486. [PMID: 38832038 PMCID: PMC11146330 DOI: 10.7717/peerj.17486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 05/08/2024] [Indexed: 06/05/2024] Open
Abstract
Abdominal subcutaneous fat deposition (ASFD) is not only related to meat quality in the pig industry but also to human health in medicine. It is of great value to elucidate the potential molecular mechanisms of ASFD. The present study aims to identify obese-specific biomarkers and key pathways correlated with ASFD in pigs. The ASF-related mRNA expression dataset GSE136754 was retrieved from the Gene Expression Omnibus (GEO) database and systematically analyzed using a comprehensive bioinformatics method. A total of 565 differentially expressed genes (DEGs) were identified between three obese and three lean pigs, and these DEGs were mainly involved in the p53 signaling pathway, MAPK signaling pathway and fatty acid metabolism. A protein-protein interaction (PPI) network, consisting of 540 nodes and 1,065 edges, was constructed, and the top ten genes with the highest degree scores-ABL1, HDAC1, CDC42, HDAC2, MRPS5, MRPS10, MDM2, JUP, RPL7L1 and UQCRFS1-were identified as hub genes in the whole PPI network. Especially HDAC1, MDM2, MRPS10 and RPL7L1 were identified as potential robust obese-specific biomarkers due to their significant differences in single gene expression levels and high ROC area; this was further verified by quantitative real-time PCR (qRT-PCR) on abdominal subcutaneous fat samples from obese-type (Saba) and lean-type (Large White) pigs. Additionally, a mRNA-miRNA-lncRNA ceRNA network consisting of four potential biomarkers, 15 miRNAs and 51 lncRNAs was established, and two targeted lncRNAs with more connections, XIST and NEAT1, were identified as potentially important regulatory factors. The findings of this study may provide novel insights into the molecular mechanism involved in ASFD.
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Affiliation(s)
- Yongli Yang
- Faculty of Animal Science and Technology, Yunnan Agricuture University, Kunming, China
| | - Xiaoyi Wang
- Faculty of Animal Science and Technology, Yunnan Agricuture University, Kunming, China
| | - Mingli Li
- Faculty of Animal Science and Technology, Yunnan Agricuture University, Kunming, China
| | - Shuyan Wang
- Faculty of Animal Science and Technology, Yunnan Agricuture University, Kunming, China
| | - Huiyu Wang
- Faculty of Animal Science and Technology, Yunnan Agricuture University, Kunming, China
- Faculty of Animal Science, Xichang University, Xichang, China
| | - Qiang Chen
- Faculty of Animal Science and Technology, Yunnan Agricuture University, Kunming, China
| | - Shaoxiong Lu
- Faculty of Animal Science and Technology, Yunnan Agricuture University, Kunming, China
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3
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Zhu M, Han Y, Gu T, Wang R, Si X, Kong D, Zhao P, Wang X, Li J, Zhai X, Yu Z, Lu H, Li J, Huang H, Qian P. Class I HDAC inhibitors enhance antitumor efficacy and persistence of CAR-T cells by activation of the Wnt pathway. Cell Rep 2024; 43:114065. [PMID: 38578828 DOI: 10.1016/j.celrep.2024.114065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 01/18/2024] [Accepted: 03/21/2024] [Indexed: 04/07/2024] Open
Abstract
Epigenetic modification shapes differentiation trajectory and regulates the exhaustion state of chimeric antigen receptor T (CAR-T) cells. Limited efficacy induced by terminal exhaustion closely ties with intrinsic transcriptional regulation. However, the comprehensive regulatory mechanisms remain largely elusive. Here, we identify class I histone deacetylase inhibitors (HDACi) as boosters of CAR-T cell function by high-throughput screening of chromatin-modifying drugs, in which M344 and chidamide enhance memory maintenance and resistance to exhaustion of CAR-T cells that induce sustained antitumor efficacy both in vitro and in vivo. Mechanistically, HDACi decrease HDAC1 expression and enhance H3K27ac activity. Multi-omics analyses from RNA-seq, ATAC-seq, and H3K27ac CUT&Tag-seq show that HDACi upregulate expression of TCF4, LEF1, and CTNNB1, which subsequently activate the canonical Wnt/β-catenin pathway. Collectively, our findings elucidate the functional roles of class I HDACi in enhancing CAR-T cell function, which provides the basis and therapeutic targets for synergic combination of CAR-T cell therapy and HDACi treatment.
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Affiliation(s)
- Meng Zhu
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China; Institute of Hematology, Zhejiang University & Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy, Hangzhou 310058, China
| | - Yingli Han
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China; Institute of Hematology, Zhejiang University & Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy, Hangzhou 310058, China
| | - Tianning Gu
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China; Institute of Hematology, Zhejiang University & Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy, Hangzhou 310058, China; Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Rui Wang
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China; Institute of Hematology, Zhejiang University & Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy, Hangzhou 310058, China
| | - Xiaohui Si
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China; Institute of Hematology, Zhejiang University & Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy, Hangzhou 310058, China; Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Delin Kong
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China; Institute of Hematology, Zhejiang University & Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy, Hangzhou 310058, China; Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Peng Zhao
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China; Institute of Hematology, Zhejiang University & Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy, Hangzhou 310058, China
| | - Xiujian Wang
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China; Institute of Hematology, Zhejiang University & Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy, Hangzhou 310058, China; Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jinxin Li
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China; Institute of Hematology, Zhejiang University & Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy, Hangzhou 310058, China
| | - Xingyuan Zhai
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China; Institute of Hematology, Zhejiang University & Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy, Hangzhou 310058, China; Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zebin Yu
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China; Institute of Hematology, Zhejiang University & Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy, Hangzhou 310058, China
| | - Huan Lu
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China; Institute of Hematology, Zhejiang University & Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy, Hangzhou 310058, China
| | - Jingyi Li
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China; Institute of Hematology, Zhejiang University & Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy, Hangzhou 310058, China
| | - He Huang
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China; Institute of Hematology, Zhejiang University & Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy, Hangzhou 310058, China; Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
| | - Pengxu Qian
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China; Institute of Hematology, Zhejiang University & Zhejiang Province Engineering Laboratory for Stem Cell and Immunity Therapy, Hangzhou 310058, China.
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Quantitative Acetylomics Uncover Acetylation-Mediated Pathway Changes Following Histone Deacetylase Inhibition in Anaplastic Large Cell Lymphoma. Cells 2022; 11:cells11152380. [PMID: 35954222 PMCID: PMC9368142 DOI: 10.3390/cells11152380] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 07/28/2022] [Accepted: 07/30/2022] [Indexed: 12/10/2022] Open
Abstract
Histone deacetylases (HDACs) target acetylated lysine residues in histone and non-histone proteins. HDACs are implicated in the regulation of genomic stability, cell cycle, cell death and differentiation and thus critically involved in tumorigenesis. Further, HDACs regulate T-cell development and HDAC inhibitors (HDACis) have been approved for clinical use in some T-cell malignancies. Still, the exact targets and mechanisms of HDAC inhibition in cancer are understudied. We isolated tumor cell lines from a transgenic mouse model of anaplastic large cell lymphoma (ALCL), a rare T-cell lymphoma, and abrogated HDAC activity by treatment with the HDACis Vorinostat and Entinostat or Cre-mediated deletion of Hdac1. Changes in overall protein expression as well as histone and protein acetylation were measured following Hdac1 deletion or pharmacological inhibition using label-free liquid chromatography mass spectrometry (LC-MS/MS). We found changes in overall protein abundance and increased acetylation of histones and non-histone proteins, many of which were newly discovered and associated with major metabolic and DNA damage pathways. For non-histone acetylation, we mapped a total of 1204 acetylated peptides corresponding to 603 proteins, including chromatin modifying proteins and transcription factors. Hyperacetylated proteins were involved in processes such as transcription, RNA metabolism and DNA damage repair (DDR). The DDR pathway was majorly affected by hyperacetylation following HDAC inhibition. This included acetylation of H2AX, PARP1 and previously unrecognized acetylation sites in TP53BP1. Our data provide a comprehensive view of the targets of HDAC inhibition in malignant T cells with general applicability and could have translational impact for the treatment of ALCL with HDACis alone or in combination therapies.
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5
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Role of Histone Deacetylases in T-Cell Development and Function. Int J Mol Sci 2022; 23:ijms23147828. [PMID: 35887172 PMCID: PMC9320103 DOI: 10.3390/ijms23147828] [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: 06/22/2022] [Revised: 07/12/2022] [Accepted: 07/12/2022] [Indexed: 01/27/2023] Open
Abstract
Histone deacetylases (HDACs) are a group of enzymes called “epigenetic erasers”. They remove the acetyl group from histones changing the condensation state of chromatin, leading to epigenetic modification of gene expression and various downstream effects. Eighteen HDACs have been identified and grouped into four classes. The role of HDACs in T-cells has been extensively studied, and it has been proven that many of them are important players in T-cell development and function. In this review, we present the current state of knowledge on the role of HDACs in the early stages of T-cell development but also in the functioning of mature lymphocytes on the periphery, including activation, cytokine production, and metabolism regulation.
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Liu K, Cui JJ, Zhan Y, Ouyang QY, Lu QS, Yang DH, Li XP, Yin JY. Reprogramming the tumor microenvironment by genome editing for precision cancer therapy. Mol Cancer 2022; 21:98. [PMID: 35410257 PMCID: PMC8996591 DOI: 10.1186/s12943-022-01561-5] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 03/11/2022] [Indexed: 12/12/2022] Open
Abstract
The tumor microenvironment (TME) is essential for immune escape by tumor cells. It plays essential roles in tumor development and metastasis. The clinical outcomes of tumors are often closely related to individual differences in the patient TME. Therefore, reprogramming TME cells and their intercellular communication is an attractive and promising strategy for cancer therapy. TME cells consist of immune and nonimmune cells. These cells need to be manipulated precisely and safely to improve cancer therapy. Furthermore, it is encouraging that this field has rapidly developed in recent years with the advent and development of gene editing technologies. In this review, we briefly introduce gene editing technologies and systematically summarize their applications in the TME for precision cancer therapy, including the reprogramming of TME cells and their intercellular communication. TME cell reprogramming can regulate cell differentiation, proliferation, and function. Moreover, reprogramming the intercellular communication of TME cells can optimize immune infiltration and the specific recognition of tumor cells by immune cells. Thus, gene editing will pave the way for further breakthroughs in precision cancer therapy.
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7
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Zhao C, Zhang Y, Zheng H. The Effects of Interferons on Allogeneic T Cell Response in GVHD: The Multifaced Biology and Epigenetic Regulations. Front Immunol 2021; 12:717540. [PMID: 34305954 PMCID: PMC8297501 DOI: 10.3389/fimmu.2021.717540] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 06/25/2021] [Indexed: 12/19/2022] Open
Abstract
Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is a potentially curative therapy for hematological malignancies. This beneficial effect is derived mainly from graft-versus-leukemia (GVL) effects mediated by alloreactive T cells. However, these alloreactive T cells can also induce graft-versus-host disease (GVHD), a life-threatening complication after allo-HSCT. Significant progress has been made in the dissociation of GVL effects from GVHD by modulating alloreactive T cell immunity. However, many factors may influence alloreactive T cell responses in the host undergoing allo-HSCT, including the interaction of alloreactive T cells with both donor and recipient hematopoietic cells and host non-hematopoietic tissues, cytokines, chemokines and inflammatory mediators. Interferons (IFNs), including type I IFNs and IFN-γ, primarily produced by monocytes, dendritic cells and T cells, play essential roles in regulating alloreactive T cell differentiation and function. Many studies have shown pleiotropic effects of IFNs on allogeneic T cell responses during GVH reaction. Epigenetic mechanisms, such as DNA methylation and histone modifications, are important to regulate IFNs’ production and function during GVHD. In this review, we discuss recent findings from preclinical models and clinical studies that characterize T cell responses regulated by IFNs and epigenetic mechanisms, and further discuss pharmacological approaches that modulate epigenetic effects in the setting of allo-HSCT.
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Affiliation(s)
- Chenchen Zhao
- Penn State Cancer Institute, Penn State University College of Medicine, Hershey, PA, United States
| | - Yi Zhang
- Fels Institute for Cancer Research and Molecular Biology, Temple University, Philadelphia, PA, United States
| | - Hong Zheng
- Penn State Cancer Institute, Penn State University College of Medicine, Hershey, PA, United States
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Datta M, Staszewski O. Hdac1 and Hdac2 are essential for physiological maturation of a Cx3cr1 expressing subset of T-lymphocytes. BMC Res Notes 2021; 14:135. [PMID: 33849645 PMCID: PMC8045300 DOI: 10.1186/s13104-021-05551-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 04/02/2021] [Indexed: 12/03/2022] Open
Abstract
Objective Histone acetylation is an important mechanism in the regulation of gene expression and plays a crucial role in both cellular development and cellular response to external or internal stimuli. One key aspect of this form of regulation is that acetylation marks can be added and removed from sites of regulation very quickly through the activity of histone acetyltransferases (HATs) and histone deacetylases (HDACs). The activity of both HATs and HDACs has been shown to be important for both physiological hematopoiesis as well as during development of hematological neoplasia, such as lymphomas. In the present study we analyzed the effect of knockout of the two HDACs, Hdac1 and Hdac2 in cells expressing the fractalkine receptor (Cx3cr1) on lymphocyte development. Results We report data showing a maturation defect in mice harboring a Cx3cr1 dependent knockout of Hdac1 and 2. Furthermore, we report that these mice develop a T-cell neoplasia at about 4–5 months of age, suggesting that a Cx3cr1 expressing subpopulation of immature T-cells gives rise to T-cell lymphomas in the combined absence of Hdac1 and Hdac2. Supplementary Information The online version contains supplementary material available at 10.1186/s13104-021-05551-6.
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Affiliation(s)
- Moumita Datta
- Faculty of Medicine, Institute of Neuropathology, University of Freiburg, 79106, Freiburg, Germany.,Faculty of Medicine, Institute for Immunology, Ulm University, 89081, Ulm, Germany
| | - Ori Staszewski
- Faculty of Medicine, Institute of Neuropathology, University of Freiburg, 79106, Freiburg, Germany. .,Berta-Ottenstein-Programme for Clinician Scientists, Faculty of Medicine, University of Freiburg, 79106, Freiburg, Germany.
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9
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Rezinciuc S, Tian Z, Wu S, Hengel S, Pasa-Tolic L, Smallwood HS. Mapping Influenza-Induced Posttranslational Modifications on Histones from CD8+ T Cells. Viruses 2020; 12:v12121409. [PMID: 33302437 PMCID: PMC7762524 DOI: 10.3390/v12121409] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 11/23/2020] [Accepted: 12/02/2020] [Indexed: 12/25/2022] Open
Abstract
T cell function is determined by transcriptional networks that are regulated by epigenetic programming via posttranslational modifications (PTMs) to histone proteins and DNA. Bottom-up mass spectrometry (MS) can identify histone PTMs, whereas intact protein analysis by MS can detect species missed by bottom-up approaches. We used a novel approach of online two-dimensional liquid chromatography-tandem MS with high-resolution reversed-phase liquid chromatography (RPLC), alternating electron transfer dissociation (ETD) and collision-induced dissociation (CID) on precursor ions to maximize fragmentation of uniquely modified species. The first online RPLC separation sorted histone families, then RPLC or weak cation exchange hydrophilic interaction liquid chromatography (WCX-HILIC) separated species heavily clad in PTMs. Tentative identifications were assigned by matching proteoform masses to predicted theoretical masses that were verified with tandem MS. We used this innovative approach for histone-intact protein PTM mapping (HiPTMap) to identify and quantify proteoforms purified from CD8 T cells after in vivo influenza infection. Activation significantly altered PTMs following influenza infection, histone maps changed as T cells migrated to the site of infection, and T cells responding to secondary infections had significantly more transcription enhancing modifications. Thus, HiPTMap identified and quantified proteoforms and determined changes in CD8 T cell histone PTMs over the course of infection.
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Affiliation(s)
- Svetlana Rezinciuc
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN 38163, USA;
| | - Zhixin Tian
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99354, USA; (Z.T.); (S.W.); (S.H.); (L.P.-T.)
| | - Si Wu
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99354, USA; (Z.T.); (S.W.); (S.H.); (L.P.-T.)
| | - Shawna Hengel
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99354, USA; (Z.T.); (S.W.); (S.H.); (L.P.-T.)
| | - Ljiljana Pasa-Tolic
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99354, USA; (Z.T.); (S.W.); (S.H.); (L.P.-T.)
| | - Heather S. Smallwood
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN 38163, USA;
- Children’s Foundation Research Institute, Memphis, TN 38105, USA
- Correspondence: ; Tel.: +1-(901)-448–3068
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Zinc deficiency leads to reduced interleukin-2 production by active gene silencing due to enhanced CREMα expression in T cells. Clin Nutr 2020; 40:3263-3278. [PMID: 33183881 DOI: 10.1016/j.clnu.2020.10.052] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/23/2020] [Accepted: 10/26/2020] [Indexed: 12/31/2022]
Abstract
BACKGROUND & AIMS The micronutrient zinc is essential for proper immune function. Consequently, zinc deficiency leads to impaired immune function, as seen in decreased secretion of interleukin (IL)-2 by T cells. Although this association has been known since the late 1980s, the underlying molecular mechanisms are still unknown. Zinc deficiency and reduced IL-2 levels are especially found in the elderly, which in turn are prone to chronic diseases. Here, we describe a new molecular link between zinc deficiency and reduced IL-2 expression in T cells. METHODS The effects of zinc deficiency were first investigated in vitro in the human T cell lines Jurkat and Hut-78 and complemented by in vivo data from zinc-supplemented pigs. A short- and long-term model for zinc deficiency was established. Zinc levels were detected by flow cytometry and expression profiles were investigated on the mRNA and protein level. RESULTS The expression of the transcription factor cAMP-responsive-element modulator α (CREMα) is increased during zinc deficiency in vitro, due to increased protein phosphatase 2A (PP2A) activity, resulting in decreased IL-2 production. Additionally, zinc supplementation in vivo reduced CREMα levels causing increased IL-2 expression. On epigenetic levels increased CREMα binding to the IL-2 promoter is mediated by histone deacetylase 1 (HDAC1). The HDAC1 activity is inhibited by zinc. Moreover, deacetylation of the activating histone mark H3K9 was increased under zinc deficiency, resulting in reduced IL-2 expression. CONCLUSIONS With the transcription factor CREMα a molecular link was uncovered, connecting zinc deficiency with reduced IL-2 production due to enhanced PP2A and HDAC1 activity.
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11
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Daams R, Sime W, Leandersson K, Sitnicka E, Massoumi R. Deletion of Nemo-like Kinase in T Cells Reduces Single-Positive CD8 + Thymocyte Population. THE JOURNAL OF IMMUNOLOGY 2020; 205:1830-1841. [PMID: 32839237 DOI: 10.4049/jimmunol.2000109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 07/23/2020] [Indexed: 12/18/2022]
Abstract
The β-catenin/Wnt signaling pathway plays an important role in all stages of T cell development. Nemo-like kinase (NLK) is an evolutionary conserved serine/threonine kinase and a negative regulator of the Wnt signaling pathway. NLK can directly phosphorylate histone deacetylase 1 (HDAC1), as well as T cell factor/lymphoid enhancer-binding factor (TCF/LEF), causing subsequent repression of target gene transcription. By engineering mice lacking NLK in early stages of T cell development, we set out to characterize the role NLK plays in T cell development and found that deletion of NLK does not affect mouse health or lymphoid tissue development. Instead, these mice harbored a reduced number of single-positive (SP) CD8+ thymocytes without any defects in the SP CD4+ thymocyte population. The decrease in SP CD8+ thymocytes was not caused by a block in differentiation from double-positive CD4+CD8+ cells. Neither TCR signaling nor activation was altered in the absence of NLK. Instead, we observed a significant increase in cell death and reduced phosphorylation of LEF1 as well as HDAC1 among NLK-deleted SP CD8+ cells. Thus, NLK seems to play an important role in the survival of CD8+ thymocytes. Our data provide evidence for a new function for NLK with regard to its involvement in T cell development and supporting survival of SP CD8+ thymocytes.
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Affiliation(s)
- Renée Daams
- Molecular Tumor Pathology, Division of Translational Cancer Research, Department of Laboratory Medicine, Lund University, 223 81 Lund, Sweden
| | - Wondossen Sime
- Molecular Tumor Pathology, Division of Translational Cancer Research, Department of Laboratory Medicine, Lund University, 223 81 Lund, Sweden
| | - Karin Leandersson
- Cancer Immunology, Department of Translational Medicine, Lund University, 214 28 Malmö, Sweden; and
| | - Ewa Sitnicka
- Lymphoid Development and Regulation, Division of Molecular Hematology, Department of Laboratory Medicine, Lund University, 221 84 Lund, Sweden
| | - Ramin Massoumi
- Molecular Tumor Pathology, Division of Translational Cancer Research, Department of Laboratory Medicine, Lund University, 223 81 Lund, Sweden;
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12
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Mota TM, McCann CD, Danesh A, Huang SH, Magat DB, Ren Y, Leyre L, Bui TD, Rohwetter TM, Kovacs CM, Benko E, MacLaren L, Wimpelberg A, Cannon CM, Hardy WD, Safrit JT, Jones RB. Integrated Assessment of Viral Transcription, Antigen Presentation, and CD8 + T Cell Function Reveals Multiple Limitations of Class I-Selective Histone Deacetylase Inhibitors during HIV-1 Latency Reversal. J Virol 2020; 94:e01845-19. [PMID: 32051267 PMCID: PMC7163115 DOI: 10.1128/jvi.01845-19] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 02/04/2020] [Indexed: 12/17/2022] Open
Abstract
Clinical trials investigating histone deacetylase inhibitors (HDACi) to reverse HIV-1 latency aim to expose reservoirs in antiretroviral (ARV)-treated individuals to clearance by immune effectors, yet have not driven measurable reductions in the frequencies of infected cells. We therefore investigated the effects of the class I-selective HDACi nanatinostat and romidepsin on various blocks to latency reversal and elimination, including viral splicing, antigen presentation, and CD8+ T cell function. In ex vivo CD4+ T cells from ARV-suppressed individuals, both HDACi significantly induced viral transcription, but not splicing nor supernatant HIV-1 RNA. In an HIV-1 latency model using autologous CD8+ T cell clones as biosensors of antigen presentation, neither HDACi-treated CD4+ T cell condition induced clone degranulation. Both HDACi also impaired the function of primary CD8+ T cells in viral inhibition assays, with nanatinostat causing less impairment. These findings suggest that spliced or cell-free HIV-1 RNAs are more indicative of antigen expression than unspliced HIV-RNAs and may help to explain the limited abilities of HDACi to generate CD8+ T cell targets in vivoIMPORTANCE Antiretroviral (ARV) drug regimens suppress HIV-1 replication but are unable to cure infection. This leaves people living with HIV-1 burdened by a lifelong commitment to expensive daily medication. Furthermore, it has become clear that ARV therapy does not fully restore health, leaving individuals at elevated risk for cardiovascular disease, certain types of cancers, and neurocognitive disorders, as well as leaving them exposed to stigma. Efforts are therefore under way to develop therapies capable of curing infection. A key focus of these efforts has been on a class of drugs called histone deacetylase inhibitors (HDACi), which have the potential of exposing hidden reservoirs of HIV-1 to elimination by the immune system. Unfortunately, clinical trial results with HDACi have thus far been disappointing. In the current study, we integrate a number of experimental approaches to build a model that provides insights into the limited activity of HDACi in clinical trials and offers direction for future approaches.
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Affiliation(s)
- Talia M Mota
- Infectious Diseases Division, Department of Medicine, Weill Cornell Medical College, New York, New York, USA
| | - Chase D McCann
- Infectious Diseases Division, Department of Medicine, Weill Cornell Medical College, New York, New York, USA
- Program in Immunology and Microbial Pathogenesis, Weill Cornell Graduate School of Medical Sciences, New York, New York, USA
| | - Ali Danesh
- Infectious Diseases Division, Department of Medicine, Weill Cornell Medical College, New York, New York, USA
| | - Szu-Han Huang
- Infectious Diseases Division, Department of Medicine, Weill Cornell Medical College, New York, New York, USA
| | - Dean B Magat
- Infectious Diseases Division, Department of Medicine, Weill Cornell Medical College, New York, New York, USA
| | - Yanqin Ren
- Infectious Diseases Division, Department of Medicine, Weill Cornell Medical College, New York, New York, USA
| | - Louise Leyre
- Program in Immunology and Microbial Pathogenesis, Weill Cornell Graduate School of Medical Sciences, New York, New York, USA
| | - Tracy D Bui
- Infectious Diseases Division, Department of Medicine, Weill Cornell Medical College, New York, New York, USA
| | - Thomas M Rohwetter
- Department of Microbiology, Immunology, & Tropical Medicine, The George Washington University, Washington, DC, USA
| | | | | | - Lynsay MacLaren
- Research Department, Whitman-Walker Health, Washington, DC, USA
| | | | | | - W David Hardy
- Division of Infectious Disease, Johns Hopkins University School of Medicine, Washington, DC, USA
| | | | - R Brad Jones
- Infectious Diseases Division, Department of Medicine, Weill Cornell Medical College, New York, New York, USA
- Program in Immunology and Microbial Pathogenesis, Weill Cornell Graduate School of Medical Sciences, New York, New York, USA
- Department of Microbiology, Immunology, & Tropical Medicine, The George Washington University, Washington, DC, USA
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13
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Yerinde C, Siegmund B, Glauben R, Weidinger C. Metabolic Control of Epigenetics and Its Role in CD8 + T Cell Differentiation and Function. Front Immunol 2019; 10:2718. [PMID: 31849941 PMCID: PMC6901948 DOI: 10.3389/fimmu.2019.02718] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 11/05/2019] [Indexed: 12/19/2022] Open
Abstract
Epigenetic programs that control posttranslational modifications of histone proteins and DNA itself tightly regulate transcriptional networks determining the identity and function of CD8+ T cells. Chromatin-modifying enzymes such as histone acetyltransferases and deacetylases, represent key molecular determinants of the epigenetic imprinting of CD8+ T cells. The functions of these enzymes highly depend on the availability of key products of cellular metabolism pathways such as acetyl-CoA, NAD (Nicotinamide adenine dinucleotide) and SEM (S-adenosylmethionine), suggesting that there is a close crosstalk between the metabolic and the epigenetic regulation of CD8+ T cells. In this review, we will discuss the metabolic regulation of CD8+ T cell epigenetics during activation and differentiation. We will furthermore summarize how metabolic signals from the tumor microenvironment (TME) shape the epigenetic landscape of CD8+ T cells to better understand the mechanism underlying CD8+ T cell exhaustion in anti-tumor and anti-viral immunity, which might help to overcome limitations of current CD8+ T cell-based therapies.
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Affiliation(s)
- Cansu Yerinde
- Division of Gastroenterology, Infectiology and Rheumatology, Medical Department, Charité - Universitätsmedizin Berlin, Berlin, Germany.,Department of Biology, Chemistry and Pharmacy, Freie Universität Berlin, Berlin, Germany
| | - Britta Siegmund
- Division of Gastroenterology, Infectiology and Rheumatology, Medical Department, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Rainer Glauben
- Division of Gastroenterology, Infectiology and Rheumatology, Medical Department, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Carl Weidinger
- Division of Gastroenterology, Infectiology and Rheumatology, Medical Department, Charité - Universitätsmedizin Berlin, Berlin, Germany.,Clinician Scientist Program, Berlin Institute of Health (BIH), Berlin, Germany
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14
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Abstract
The differentiation of T helper cell subsets and their acquisition of effector functions are accompanied by changes in gene expression programmes, which in part are regulated and maintained by epigenetic processes. Histone deacetylases (HDACs) and histone acetyltransferases (HATs) are key epigenetic regulators that function by mediating dynamic changes in the acetylation of histones at lysine residues. In addition, many non-histone proteins are also acetylated, and reversible acetylation affects their functional properties, demonstrating that HDACs mediate effects beyond the epigenetic regulation of gene expression. In this Review, we discuss studies revealing that HDACs are key regulators of CD4+ T cell-mediated immunity in mice and humans and that HDACs are promising targets in T cell-mediated immune diseases. Finally, we discuss unanswered questions and future research directions to promote the concept that isoform-selective HDAC inhibitors might broaden the clinical application of HDAC inhibitors beyond their current use in certain types of cancer.
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Affiliation(s)
- Wilfried Ellmeier
- Division of Immunobiology, Institute of Immunology, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria.
| | - Christian Seiser
- Division of Cell and Developmental Biology, Center for Anatomy and Cell Biology, Medical University of Vienna, Vienna, Austria
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15
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Chen YC, Chao TY, Leung SY, Chen CJ, Wu CC, Fang WF, Wang YH, Chang HC, Wang TY, Lin YY, Zheng YX, Lin MC, Hsiao CC. Histone H3K14 hypoacetylation and H3K27 hypermethylation along with HDAC1 up-regulation and KDM6B down-regulation are associated with active pulmonary tuberculosis disease. Am J Transl Res 2017; 9:1943-1955. [PMID: 28469799 PMCID: PMC5411942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 11/26/2016] [Indexed: 06/07/2023]
Abstract
The aim of this study is to determine the roles of global histone acetylation (Ac)/methylation (me), their modifying enzymes, and gene-specific histone enrichment in active pulmonary tuberculosis (TB) disease. Global histone H3K27me3, H3K27me2, H3K9me3, H3K9Ac, and H3K14Ac expressions, and their modifying enzyme expressions, including KDM1A, KDM6B, EZH2, HDAC1, and HDAC2, were assessed in blood leukocytes from 81 patients with active pulmonary TB disease and 44 matched healthy subjects (HS). TLR2, TNF-α, IFN-γ, and IL12B-specific histone enrichment of peripheral blood mononuclear cells was measured by chromatin immunoprecipitation method. We found that Global H3K14Ac was decreased and H3K27me2 was increased in TB patients as compared with that in HS. TB patients with low H3K14Ac had lower one-year survival. Global H3K27me3 was increased in TB patients with high bacterial burden, or systemic symptoms as compared with that in those without the attribute or HS. HDAC1 gene/protein expressions were increased in TB patients as compared with that in HS, whereas KDM6B gene/protein expressions were decreased. Global H3K27me2, HDAC1 and KDM6B protein expressions were all reversed to normal after 6-month anti-TB treatment. TNF-α/IL12B promoter-specific H3K14Ac and TNF-α/IL12B/IFN-γ promoter-specific H3K27me2 enrichment were all decreased in 10 TB patients as compared with that in 10 HS. Among them, IL12B-specific H3K27me2 enrichment was reversed to normal after treatment, while the other 4 remained depressed. In conclusions, H3K14 hypoacetylation and H3K27 hypermethylation play a role in the development of active pulmonary TB disease or its clinical phenotypes, probably through up-regulation of HDAC1 and down-regulation of KDM6B, respectively.
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Affiliation(s)
- Yung-Che Chen
- Division of Pulmonary and Critical Care Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung, Taiwan
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Center for Shockwave Medicine and Tissue Engineering, Kaohsiung Chang Gung Memorial HospitalTaiwan
| | - Tung-Ying Chao
- Division of Pulmonary and Critical Care Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung, Taiwan
| | - Sum-Yee Leung
- Division of Pulmonary and Critical Care Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung, Taiwan
| | - Chung-Jen Chen
- Division of Rheumatology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung, Taiwan
| | - Chao-Chien Wu
- Division of Pulmonary and Critical Care Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung, Taiwan
| | - Wen-Feng Fang
- Division of Pulmonary and Critical Care Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung, Taiwan
| | - Yi-Hsi Wang
- Division of Pulmonary and Critical Care Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung, Taiwan
| | - Huang-Chih Chang
- Division of Pulmonary and Critical Care Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung, Taiwan
| | - Ting-Ya Wang
- Division of Pulmonary and Critical Care Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung, Taiwan
| | - Yong-Yong Lin
- Division of Pulmonary and Critical Care Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung, Taiwan
| | - Yi-Xin Zheng
- Division of Pulmonary and Critical Care Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung, Taiwan
| | - Meng-Chih Lin
- Division of Pulmonary and Critical Care Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of MedicineKaohsiung, Taiwan
| | - Chang-Chun Hsiao
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Center for Shockwave Medicine and Tissue Engineering, Kaohsiung Chang Gung Memorial HospitalTaiwan
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16
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Nunez-Andrade N, Sanchez-Madrid F, Martin-Cofreces NB. HDAC6 is a Regulator of CTL Function through Control of Lytic Granule Dynamics. ACTA ACUST UNITED AC 2016; 5. [PMID: 27595053 DOI: 10.4172/2168-9431.1000143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Viral infections involve specific stress exposure that can influence the quality and average lifespan of an organism. The immune system acts through virus clearance from the organism. Many aspects of immune cells accounting for this response are still under study. Here, we review recent aspects of the molecular mechanisms involved in the delivery of the lethal hit by Cytotoxic T lymphocytes.
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Affiliation(s)
- Norman Nunez-Andrade
- Servicio de Inmunología, Hospital Universitario de la Princesa, UAM, IIS-IP, Madrid, Spain.,Area of Vascular Pathophysiology, Laboratory of Intercellular Communication, Fundación Centro Nacional de Investigaciones Cardiovasculares-Carlos III, Madrid, Spain
| | - Francisco Sanchez-Madrid
- Servicio de Inmunología, Hospital Universitario de la Princesa, UAM, IIS-IP, Madrid, Spain.,Area of Vascular Pathophysiology, Laboratory of Intercellular Communication, Fundación Centro Nacional de Investigaciones Cardiovasculares-Carlos III, Madrid, Spain
| | - Noa Beatriz Martin-Cofreces
- Servicio de Inmunología, Hospital Universitario de la Princesa, UAM, IIS-IP, Madrid, Spain.,Area of Vascular Pathophysiology, Laboratory of Intercellular Communication, Fundación Centro Nacional de Investigaciones Cardiovasculares-Carlos III, Madrid, Spain
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17
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Abnormal histone acetylation of CD8 + T cells in patients with severe aplastic anemia. Int J Hematol 2016; 104:540-547. [PMID: 27485471 DOI: 10.1007/s12185-016-2061-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 05/18/2016] [Accepted: 07/12/2016] [Indexed: 01/20/2023]
Abstract
Severe aplastic anemia (SAA) is a rare autoimmune disease characterized by severe pancytopenia and bone marrow failure, which is caused by activated T lymphocytes. In the present study, we evaluated histone H3 acetylation levels of bone marrow CD8+ T cells in SAA patients, and analyzed its correlation with clinical condition parameters. We found that the percentages of CD8+ T cell histone H3 acetylation in patients with untreated SAA, recovering SAA (R-SAA) and normal control, were 1.21 ± 0.08, 1.05 ± 0.36, and 1.00 ± 0.41, respectively, with no significant statistical differences. However, the amount of CD8+ T cell histone H3 acetylation from untreated SAA was 176.21 ± 32.22 μg/mg protein, which was significantly higher than that of complete response (CR)-SAA (104.29 ± 62.06 μg/mg protein) and normal control (133.94 ± 56.27 μg/mg protein) (P < 0.05) groups. Moreover, histone H3 acetylation amount of CD8+ T cell was significantly and negatively correlated with absolute neutrophil count, proportion of reticulocytes, ratio of CD4+ to CD8+ T cell in peripheral blood, and percentage of bone marrow erythroid (P < 0.05). To some extent, it also negatively correlated with hemoglobin level, platelet count, percentage of bone marrow granulocyte, and megakaryocyte count. Abnormal histone H3 acetylation of CD8+ T cells may thus play a role in the immune pathogenesis of SAA.
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18
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Jeng MY, Ali I, Ott M. Manipulation of the host protein acetylation network by human immunodeficiency virus type 1. Crit Rev Biochem Mol Biol 2015; 50:314-25. [PMID: 26329395 PMCID: PMC4816045 DOI: 10.3109/10409238.2015.1061973] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Over the past 15 years, protein acetylation has emerged as a globally important post-translational modification that fine-tunes major cellular processes in many life forms. This dynamic regulatory system is critical both for complex eukaryotic cells and for the viruses that infect them. HIV-1 accesses the host acetylation network by interacting with several key enzymes, thereby promoting infection at multiple steps during the viral life cycle. Inhibitors of host histone deacetylases and bromodomain-containing proteins are now being pursued as therapeutic strategies to enhance current antiretroviral treatment. As more acetylation-targeting compounds are reaching clinical trials, it is time to review the role of reversible protein acetylation in HIV-infected CD4(+) T cells.
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Affiliation(s)
- Mark Y. Jeng
- Gladstone Institute of Virology and Immunology, San Francisco, CA 94158, USA
- Department of Medicine, University of California, San Francisco, CA 94158, USA
| | - Ibraheem Ali
- Gladstone Institute of Virology and Immunology, San Francisco, CA 94158, USA
- Department of Medicine, University of California, San Francisco, CA 94158, USA
| | - Melanie Ott
- Gladstone Institute of Virology and Immunology, San Francisco, CA 94158, USA
- Department of Medicine, University of California, San Francisco, CA 94158, USA
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