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Huang Z, Zhang R, Teng Y, Guo J, Zhang H, Wang L, Tang LV, Shi W, Wu Q, Xia L. Nuclear Matrix-associated Protein SMAR1 Attenuated Acute Graft-versus-host Disease by Targeting JAK-STAT Signaling in CD4 + T Cells. Transplantation 2024; 108:e23-e35. [PMID: 37817309 DOI: 10.1097/tp.0000000000004818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/12/2023]
Abstract
BACKGROUND Acute graft-versus-host disease (aGVHD) mediated by alloreactive T cells remains a serious and life-threatening complication of allogeneic hematopoietic cell transplantation (allo-HCT). The contribution of the different CD4 + T helper cell subtypes to the pathogenesis and regulation of aGVHD is a central point in current research. The specialized effector subsets of T cells that differentiate from naive T cells into mature cells are closely related to scaffold/matrix-associated region-1-binding protein (SMAR1). However, the role of SMAR1 in aGVHD is unclear. METHODS Peripheral blood was collected from the patients with or without aGVHD after allo-HCT. The differences in CD4 + T cells transduced with the SMAR1 lentivirus vector and empty vector were analyzed. A humanized aGVHD mouse model was constructed to evaluate the function of SMAR1 in aGVHD. RESULTS The expression of SMAR1 was significantly reduced in the CD4 + T cells from aGVHD patients and related to the occurrence of aGVHD. SMAR1 overexpression in human CD4 + T cells regulated CD4 + T-cell subsets differentiation and inflammatory cytokines secretion and inhibited the Janus kinase/signal transducer and activator of transcription pathway. Moreover, SMAR1 changed chromatin accessibility landscapes and affected the binding motifs of key transcription factors regulating T cells. Additionally, upregulation of SMAR1 expression in CD4 + T cells improved the survival and pathology in a humanized aGVHD mouse model. CONCLUSIONS Our results showed that upregulation of SMAR1 regulated the CD4 + T-cell subpopulation and cytokines secretion and improved survival in a humanized aGVHD mouse model by alleviating inflammation. This study provides a promising therapeutic target for aGVHD.
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Affiliation(s)
- Zhenli Huang
- Department of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ran Zhang
- Department of Hematology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yao Teng
- Department of Rheumatology and Immunology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jingjing Guo
- Department of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hongyong Zhang
- Department of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Li Wang
- Department of Hematology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Liang V Tang
- Department of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Shi
- Department of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qiuling Wu
- Department of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Linghui Xia
- Department of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Banerjee R, Ajithkumar P, Keestra N, Smith J, Gimenez G, Rodger EJ, Eccles MR, Antony J, Weeks RJ, Chatterjee A. Targeted DNA Methylation Editing Using an All-in-One System Establishes Paradoxical Activation of EBF3. Cancers (Basel) 2024; 16:898. [PMID: 38473261 DOI: 10.3390/cancers16050898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 02/17/2024] [Accepted: 02/20/2024] [Indexed: 03/14/2024] Open
Abstract
Cutaneous melanoma is rapidly on the rise globally, surpassing the growth rate of other cancers, with metastasis being the primary cause of death in melanoma patients. Consequently, understanding the mechanisms behind this metastatic process and exploring innovative treatments is of paramount importance. Recent research has shown promise in unravelling the role of epigenetic factors in melanoma progression to metastasis. While DNA hypermethylation at gene promoters typically suppresses gene expression, we have contributed to establishing the newly understood mechanism of paradoxical activation of genes via DNA methylation, where high methylation coincides with increased gene activity. This mechanism challenges the conventional paradigm that promoter methylation solely silences genes, suggesting that, for specific genes, it might actually activate them. Traditionally, altering DNA methylation in vitro has involved using global demethylating agents, which is insufficient for studying the mechanism and testing the direct consequence of gene methylation changes. To investigate promoter hypermethylation and its association with gene activation, we employed a novel approach utilising a CRISPR-SunTag All-in-one system. Here, we focused on editing the DNA methylation of a specific gene promoter segment (EBF3) in melanoma cells using the All-in-one system. Using bisulfite sequencing and qPCR with RNA-Seq, we successfully demonstrated highly effective methylation and demethylation of the EBF3 promoter, with subsequent gene expression changes, to establish and validate the paradoxical role of DNA methylation. Further, our study provides novel insights into the function of the EBF3 gene, which remains largely unknown. Overall, this study challenges the conventional view of methylation as solely a gene-silencing mechanism and demonstrates a potential function of EBF3 in IFN pathway signalling, potentially uncovering new insights into epigenetic drivers of malignancy and metastasis.
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Affiliation(s)
- Rakesh Banerjee
- Department of Pathology, Dunedin School of Medicine, University of Otago, Dunedin 9054, New Zealand
| | - Priyadarshana Ajithkumar
- Department of Pathology, Dunedin School of Medicine, University of Otago, Dunedin 9054, New Zealand
| | - Nicholas Keestra
- Department of Pathology, Dunedin School of Medicine, University of Otago, Dunedin 9054, New Zealand
| | - Jim Smith
- Department of Pathology, Dunedin School of Medicine, University of Otago, Dunedin 9054, New Zealand
| | - Gregory Gimenez
- Department of Pathology, Dunedin School of Medicine, University of Otago, Dunedin 9054, New Zealand
| | - Euan J Rodger
- Department of Pathology, Dunedin School of Medicine, University of Otago, Dunedin 9054, New Zealand
| | - Michael R Eccles
- Department of Pathology, Dunedin School of Medicine, University of Otago, Dunedin 9054, New Zealand
| | - Jisha Antony
- Department of Pathology, Dunedin School of Medicine, University of Otago, Dunedin 9054, New Zealand
| | - Robert J Weeks
- Department of Pathology, Dunedin School of Medicine, University of Otago, Dunedin 9054, New Zealand
| | - Aniruddha Chatterjee
- Department of Pathology, Dunedin School of Medicine, University of Otago, Dunedin 9054, New Zealand
- School of Health Sciences and Technology, UPES University, Dehradun 248007, India
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Almojil D, Diawara A, Soulama I, Dieng MM, Manikandan V, Sermé SS, Sombié S, Diarra A, Barry A, Coulibaly SA, Sirima SB, Idaghdour Y. Impact of Plasmodium falciparum infection on DNA methylation of circulating immune cells. Front Genet 2023; 14:1197933. [PMID: 37470040 PMCID: PMC10352500 DOI: 10.3389/fgene.2023.1197933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 06/02/2023] [Indexed: 07/21/2023] Open
Abstract
The regulation of immune cell responses to infection is a complex process that involves various molecular mechanisms, including epigenetic regulation. DNA methylation has been shown to play central roles in regulating gene expression and modulating cell response during infection. However, the nature and extent to which DNA methylation is involved in the host immune response in human malaria remains largely unknown. Here, we present a longitudinal study investigating the temporal dynamics of genome-wide in vivo DNA methylation profiles using 189 MethylationEPIC 850 K profiles from 66 children in Burkina Faso, West Africa, sampled three times: before infection, during symptomatic parasitemia, and after malaria treatment. The results revealed major changes in the DNA methylation profiles of children in response to both Plasmodium falciparum infection and malaria treatment, with widespread hypomethylation of CpGs upon infection (82% of 6.8 K differentially methylated regions). We document a remarkable reversal of CpG methylation profiles upon treatment to pre-infection states. These changes implicate divergence in core immune processes, including the regulation of lymphocyte, neutrophil, and myeloid leukocyte function. Integrative DNA methylation-mRNA analysis of a top differentially methylated region overlapping the pro-inflammatory gene TNF implicates DNA methylation of TNF cis regulatory elements in the molecular mechanisms of TNF regulation in human malaria. Our results highlight a central role of epigenetic regulation in mounting the host immune response to P. falciparum infection and in response to malaria treatment.
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Affiliation(s)
- Dareen Almojil
- Program in Biology, Division of Science and Mathematics, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Aïssatou Diawara
- Program in Biology, Division of Science and Mathematics, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Issiaka Soulama
- Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | - Mame Massar Dieng
- Program in Biology, Division of Science and Mathematics, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Vinu Manikandan
- Program in Biology, Division of Science and Mathematics, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Samuel S. Sermé
- Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | - Salif Sombié
- Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | - Amidou Diarra
- Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | - Aissata Barry
- Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | | | - Sodiomon B. Sirima
- Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | - Youssef Idaghdour
- Program in Biology, Division of Science and Mathematics, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
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Zhang Y, Gao Y, Ding Y, Jiang Y, Chen H, Zhan Z, Liu X. Targeting KAT2A inhibits inflammatory macrophage activation and rheumatoid arthritis through epigenetic and metabolic reprogramming. MedComm (Beijing) 2023; 4:e306. [PMID: 37313329 PMCID: PMC10258526 DOI: 10.1002/mco2.306] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Revised: 05/09/2023] [Accepted: 05/11/2023] [Indexed: 06/15/2023] Open
Abstract
Epigenetic regulation of inflammatory macrophages governs inflammation initiation and resolution in the pathogenesis of rheumatoid arthritis (RA). Nevertheless, the mechanisms underlying macrophage-mediated arthritis injuries remain largely obscure. Here, we found that increased expression of lysine acetyltransferase 2A (KAT2A) in synovial tissues was closely correlated with inflammatory joint immunopathology in both RA patients and experimental arthritis mice. Administration of MB-3, the KAT2A-specific chemical inhibitor, significantly ameliorated the synovitis and bone destruction in collagen-induced arthritis model. Both pharmacological inhibition and siRNA silencing of KAT2A, not only suppressed innate stimuli-triggered proinflammatory gene (such as Il1b and Nlrp3) transcription but also impaired NLR family pyrin domain containing 3 (NLRP3) inflammasome activation in vivo and in vitro. Mechanistically, KAT2A facilitated macrophage glycolysis reprogramming through suppressing nuclear factor-erythroid 2-related factor 2 (NRF2) activity as well as downstream antioxidant molecules, which supported histone 3 lysine 9 acetylation (H3K9ac) and limited NRF2-mediated transcriptional repression of proinflammatory genes. Our study proves that acetyltransferase KAT2A licenses metabolic and epigenetic reprogramming for NLRP3 inflammasome activation in inflammatory macrophages, thereby targeting KAT2A represents a potential therapeutic approach for patients suffering from RA and relevant inflammatory diseases.
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Affiliation(s)
- Yunkai Zhang
- Department of Pathogen BiologyNaval Medical UniversityShanghaiChina
- National Key Laboratory of Immunity & InflammationNaval Medical UniversityShanghaiChina
| | - Ying Gao
- Department of RheumatologyChanghai Hospital, Naval Medical UniversityShanghaiChina
- Key Laboratory of Arrhythmias of the Ministry of Education of ChinaShanghai East Hospital, Tongji University School of MedicineShanghaiChina
| | - Yingying Ding
- Department of Pathogen BiologyNaval Medical UniversityShanghaiChina
| | - Yuyu Jiang
- Department of Pathogen BiologyNaval Medical UniversityShanghaiChina
| | - Huiying Chen
- Department of Pathogen BiologyNaval Medical UniversityShanghaiChina
| | - Zhenzhen Zhan
- Key Laboratory of Arrhythmias of the Ministry of Education of ChinaShanghai East Hospital, Tongji University School of MedicineShanghaiChina
- Department of Liver Surgery, Shanghai Institute of TransplantationRenji Hospital, Shanghai Jiao Tong University School of MedicineShanghaiChina
| | - Xingguang Liu
- Department of Pathogen BiologyNaval Medical UniversityShanghaiChina
- National Key Laboratory of Immunity & InflammationNaval Medical UniversityShanghaiChina
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Laudanski K, Liu D, Hajj J, Ghani D, Szeto WY. Serum level of total histone 3, H3K4me3, and H3K27ac after non-emergent cardiac surgery suggests the persistence of smoldering inflammation at 3 months in an adult population. Clin Epigenetics 2022; 14:112. [PMID: 36068552 PMCID: PMC9446722 DOI: 10.1186/s13148-022-01331-6] [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: 05/03/2022] [Accepted: 08/24/2022] [Indexed: 11/29/2022] Open
Abstract
Background Despite clinical relevance of immunological activation due to histone leakage into the serum following cardiac surgery, long-term data describing their longitudinal dynamic are lacking. Therefore, this study examines the serum levels of histone 3 (tH3) and its modifications (H3K4me3 and H3K27ac) alongside immune system activation during the acute and convalescence phases of cardiac surgery. Methods Blood samples from fifty-nine individuals were collected before non-emergent cardiac surgery (tpre-op) and 24 h (t24hr), seven days (t7d), and three months (t3m) post-procedure to examine serum levels of tH3, H3K4me3, and H3K27ac. Serum heat shock protein-60 (HSP-60) was a surrogate of the cellular damage marker. Serum C-reactive protein (CRP) and interleukin 6 (IL-6) assessed smoldering inflammation. TNFα and IL-6 production by whole blood in response to lipopolysaccharide (LPS) evaluated immunological activation. Electronic medical records provided demographic, peri-operative, and clinical information. Paired longitudinal analyses were employed with data expressed as mean and standard deviation (X ± SD) or median and interquartile range (Me[IQ25; 75%]. Results Compared to pre-operative levels (tH3Pre-op = 1.6[0.33;2.4]), post-operative serum tH3 significantly (p > 0.0001) increased after heart surgery (tH324hr = 2.2[0.3;28]), remained elevated at 7 days (tH37d = 2.4[0.37;5.3]), and at 3 months (tH33m = 2.0[0.31;2.9]). Serum H3K27ac was elevated at 24 h (H3K27ac24hr = 0.66 ± 0.51; p = 0.025) and seven days (H3K27ac7d = 0.94 ± 0.95; p = 0.032) as compared to baseline hours (H3K27acPre-op = 0.55 ± 0.54). Serum H3K4me3 was significantly diminished at three months (H3K4me3Pre-op = 0.94 ± 0.54 vs. H3K27ac3m = 0.59 ± 0.89; p = 0.008). tH3 correlated significantly with the duration of anesthesia (r2 = 0.38). In contrast, HSP-60 normalized seven days after surgery. Peri-operative intake of acetaminophen, but no acetylsalicylic acid (ASA), acid, ketorolac or steroids, resulted in the significant depression of serum H3K4me3 at 24 h (H3K4me3acetom- = 1.26[0.71; 3.21] vs H3K4me3acetom+ = 0.54[0.07;1.01]; W[50] = 2.26; p = 0.021). CRP, but not IL-6, remained elevated at 3 months compared to pre-surgical levels and correlated with tH324hrs (r2 = 0.43), tH37d (r2 = 0.71; p < 0.05), H3K4me37d (r2 = 0.53), and H3K27ac7d (r2 = 0.49). Production of TNFα by whole blood in response to LPS was associated with serum tH324hrs (r2 = 0.67). Diminished H3K4me324hrs, H3K27ac24hrs, and H3K27ac3m, accompanied the emergence of liver failure. Conclusions We demonstrated a prolonged elevation in serum histone 3 three months after cardiac surgery. Furthermore, histone 3 modifications had a discrete time evolution indicating differential immune activation.
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Affiliation(s)
- Krzysztof Laudanski
- Department of Anesthesiology and Critical Care, University of Pennsylvania, JMB 127, 3620 Hamilton Walk, Philadelphia, PA, 19146, USA. .,Department of Neurology, University of Pennsylvania, JMB 127, 3620 Hamilton Walk, Philadelphia, PA, 19146, USA. .,Leonard Davis Institute for Health Economics, University of Pennsylvania, JMB 127, 3620 Hamilton Walk, Philadelphia, PA, 19146, USA.
| | - Da Liu
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, People's Republic of China
| | - Jihane Hajj
- School of Nursing, Widener University, Philadelphia, PA, USA
| | - Danyal Ghani
- Department of Cardiac Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Wilson Y Szeto
- Division of Cardiovascular Surgery, Department of Surgery, University of Pennsylvania, Philadelphia, PA, USA
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6
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Zhao Q, Hu W, Xu J, Zeng S, Xi X, Chen J, Wu X, Hu S, Zhong T. Comprehensive Pan-Cancer Analysis of Senescence With Cancer Prognosis and Immunotherapy. Front Mol Biosci 2022; 9:919274. [PMID: 35911954 PMCID: PMC9334796 DOI: 10.3389/fmolb.2022.919274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 05/31/2022] [Indexed: 12/03/2022] Open
Abstract
Senescence is a double-edged sword in tumorigenesis and affects the immunotherapy response through the modulation of the host’s immune system. However, there is currently a lack of comprehensive analysis of the senescence-related genes (SRGs) in human cancers, and the predictive role of senescence in cancer immunotherapy response has not been explored. The multi-omics approaches were performed in this article to conduct a systematic pan-cancer genomic analysis of SRGs in cancer. In addition, we calculated the generic senescence score (SS) to quantify the senescence levels in cancers and explored the correlations of SS with cancer prognosis, biological processes, and tumor microenvironment (TME). The gene signatures were deregulated in multiple cancers and indicated a context-dependent correlation with prognosis, tumor-immune evasion, and response to therapy across various tumor types. Further analysis disclosed that SS was positively associated with the infiltration levels of immune suppressive cells, including induced Tregs (iTregs), central memory Ts (Tcms), and natural Tregs (nTregs), and negatively associated with immune killer cells, including natural killers (NKs) and mucosal-associated invariant Ts (MAITs). Moreover, the SS was significantly correlated with tumor-associated macrophages (TAMs), cancer-associated fibroblasts (CAFs), immune-related genes, and immune checkpoints and had a predictive value of immunotherapy response. Thus, the expression of SRGs was involved in resistance to several anticancer drugs. Our work illustrates the characterization of senescence across various malignancies and highlights the potential of senescence as a biomarker of the response to immunotherapy.
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Affiliation(s)
- Qinfei Zhao
- Department of Laboratory Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Weiquan Hu
- Department of Joint Surgery, Ganzhou People’s Hospital, Ganzhou, China
| | - Jing Xu
- Department of Orthopaedic Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Shaoying Zeng
- Department of Obstetrics and Gynecology, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Xuxiang Xi
- Department of Laboratory Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Jing Chen
- Department of Laboratory Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Xiangsheng Wu
- Department of Laboratory Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Suping Hu
- Department of Emergency, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Tianyu Zhong
- Department of Laboratory Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
- *Correspondence: Tianyu Zhong,
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7
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Hou L, Guo S, Ding D, Du B, Wang X. Neuroendocrinal and molecular basis of flight performance in locusts. Cell Mol Life Sci 2022; 79:325. [PMID: 35644827 PMCID: PMC11071871 DOI: 10.1007/s00018-022-04344-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 03/22/2022] [Accepted: 05/02/2022] [Indexed: 11/03/2022]
Abstract
Insect flight is a complex physiological process that involves sensory and neuroendocrinal control, efficient energy metabolism, rhythmic muscle contraction, and coordinated wing movement. As a classical study model for insect flight, locusts have attracted much attention from physiologists, behaviorists, and neuroendocrinologists over the past decades. In earlier research, scientists made extensive efforts to explore the hormone regulation of metabolism related to locust flight; however, this work was hindered by the absence of molecular and genetic tools. Recently, the rapid development of molecular and genetic tools as well as multi-omics has greatly advanced our understanding of the metabolic, molecular, and neuroendocrinal basis of long-term flight in locusts. Novel neural and molecular factors modulating locust flight and their regulatory mechanisms have been explored. Moreover, the molecular mechanisms underlying phase-dependent differences in locust flight have also been revealed. Here, we provide a systematic review of locust flight physiology, with emphasis on recent advances in the neuroendocrinal, genetic, and molecular basis. Future research directions and potential challenges are also addressed.
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Affiliation(s)
- Li Hou
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Siyuan Guo
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Ding Ding
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Baozhen Du
- Beijing Institutes of Life Sciences, Chinese Academy of Sciences, Beijing, 100101, China
| | - Xianhui Wang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing, 100049, China.
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8
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Ozawa T, Fujii K, Sudo T, Doi Y, Nakai R, Shingai Y, Ueda T, Baba Y, Hosen N, Yokota T. Special AT-Rich Sequence-Binding Protein 1 Supports Survival and Maturation of Naive B Cells Stimulated by B Cell Receptors. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 208:1937-1946. [PMID: 35379742 DOI: 10.4049/jimmunol.2101097] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 02/09/2022] [Indexed: 11/19/2022]
Abstract
Epigenetic mechanisms underpin the elaborate activities of essential transcription factors in lymphocyte development. Special AT-rich sequence-binding protein 1 (SATB1) is a chromatin remodeler that orchestrates the spatial and temporal actions of transcription factors. Previous studies have revealed the significance of SATB1 in T cell lineage. However, whether and how SATB1 controls B cell lineage development is yet to be clarified. In this study, we show that SATB1 is an important factor during splenic B cell maturation. By analyzing SATB1/Tomato reporter mice, we determined the dynamic fluctuation of SATB1 expression in the B cell lineage. Although SATB1 expression decreased to minimal levels during B cell differentiation in the bone marrow, it resurged markedly in naive B cells in the spleen. The expression was dramatically downregulated upon Ag-induced activation. Splenic naive B cells were subdivided into two categories, namely SATB1high and SATB1-/low, according to their SATB1 expression levels. SATB1high naive B cells were less susceptible to death and greater proliferative than were SATB1-/low cells during incubation with an anti-IgM Ab. Additionally, SATB1high cells tended to induce the expression of MHC class II, CD86, and CD83. Accordingly, naive B cells from B lineage-specific SATB1 conditional knockout mice were more susceptible to apoptosis than that in the control group upon anti-IgM Ab stimulation in vitro. Furthermore, conditional knockout mice were less capable of producing Ag-specific B cells after immunization. Collectively, our findings suggest that SATB1 expression increases in naive B cells and plays an important role in their survival and maturation.
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Affiliation(s)
- Takayuki Ozawa
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Kentaro Fujii
- Department of Immunology and Cell Biology, Graduate School of Medicine and Frontier Biosciences, Osaka University, Osaka, Japan
| | - Takao Sudo
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yukiko Doi
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Ritsuko Nakai
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yasuhiro Shingai
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tomoaki Ueda
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yoshihiro Baba
- Division of Immunology and Genome Biology, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
| | - Naoki Hosen
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan.,Laboratory of Cellular Immunotherapy, World Premier International Immunology Frontier Research Center, Osaka University, Osaka, Japan; and.,Integrated Frontier Research for Medical Science Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Osaka, Japan
| | - Takafumi Yokota
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan;
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9
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Lawal B, Tseng SH, Olugbodi JO, Iamsaard S, Ilesanmi OB, Mahmoud MH, Ahmed SH, Batiha GES, Wu ATH. Pan-Cancer Analysis of Immune Complement Signature C3/C5/C3AR1/C5AR1 in Association with Tumor Immune Evasion and Therapy Resistance. Cancers (Basel) 2021; 13:4124. [PMID: 34439277 PMCID: PMC8394789 DOI: 10.3390/cancers13164124] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/09/2021] [Accepted: 08/13/2021] [Indexed: 01/08/2023] Open
Abstract
Despite the advances in our understanding of the genetic and immunological basis of cancer, cancer remains a major public health burden with an ever-increasing incidence rate globally. Nevertheless, increasing evidence suggests that the components of the complement system could regulate the tumor microenvironment (TME) to promote cancer progression, recurrence, and metastasis. In the present study, we used an integrative multi-omics analysis of clinical data to explore the relationships between the expression levels of and genetic and epigenetic alterations in C3, C5, C3AR1, and C5AR1 and tumor immune evasion, therapy response, and patient prognosis in various cancer types. We found that the complements C3, C5, C3AR1, and C5AR1 have deregulated expression in human malignancies and are associated with activation of immune-related oncogenic processes and poor prognosis of cancer patients. Furthermore, we found that the increased expression levels of C3, C5, C3AR1, and C5AR1 were primarily predicted by copy number variation and gene methylation and were associated with dysfunctional T-cell phenotypes. Single nucleotide variation in the gene signature co-occurred with multiple oncogenic mutations and is associated with the progression of onco-immune-related diseases. Further correlation analysis revealed that C3, C5, C3AR1, and C5AR1 were associated with tumor immune evasion via dysfunctional T-cell phenotypes with a lesser contribution of T-cell exclusion. Lastly, we also demonstrated that the expression levels of C3, C5, C3AR1, and C5AR1 were associated with context-dependent chemotherapy, lymphocyte-mediated tumor killing, and immunotherapy outcomes in different cancer types. In conclusion, the complement components C3, C5, C3AR1, and C5AR1 serve as attractive targets for strategizing cancer immunotherapy and response follow-up.
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Affiliation(s)
- Bashir Lawal
- PhD Program for Cancer Molecular Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University and Academia Sinica, Taipei 11031, Taiwan;
- Graduate Institute for Cancer Biology & Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei 11031, Taiwan
| | - Sung-Hui Tseng
- Department of Physical Medicine and Rehabilitation, Taipei Medical University Hospital, Taipei 11031, Taiwan;
- Department of Physical Medicine and Rehabilitation, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
| | | | - Sitthichai Iamsaard
- Department of Anatomy, Faculty of Medicine and Research Institute for Human High Performance and Health Promotion (HHP&HP), Khon Kaen University, Khon Kaen 40002, Thailand;
| | - Omotayo B. Ilesanmi
- Department of Biochemistry, Faculty of Science, Federal University Otuoke, Ogbia 23401, Bayelsa State, Nigeria;
| | - Mohamed H. Mahmoud
- Department of Biochemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Sahar H. Ahmed
- Medical Laboratory Technology Department, Faculty of Applied Medical Science, Misr University For Science &Technology, Cairo 3245310, Egypt;
| | - Gaber El-Saber Batiha
- Department of Pharmacology and Therapeutics, Faculty of Veterinary Medicine, Damanhour University, Damanhour 22511, AlBeheira, Egypt;
| | - Alexander T. H. Wu
- International Ph.D. Program for Translational Science, College of Medical Science and Technology, Taipei Medical University, Taipei 11031, Taiwan
- The PhD Program of Translational Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei 11031, Taiwan
- Clinical Research Center, Taipei Medical University Hospital, Taipei Medical University, Taipei 11031, Taiwan
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei 11490, Taiwan
- Taipei Heart Institute (THI), Taipei Medical University, Taipei 11031, Taiwan
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10
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Lin Y, Xiao Y, Lin C, Zhang Q, Zhang S, Pei F, Liu H, Chen Z. SALL1 regulates commitment of odontoblast lineages by interacting with RUNX2 to remodel open chromatin regions. STEM CELLS (DAYTON, OHIO) 2020; 39:196-209. [PMID: 33159702 DOI: 10.1002/stem.3298] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 10/18/2020] [Indexed: 11/10/2022]
Abstract
Mouse dental papilla cells (mDPCs) derive from cranial neural crest cells and maintain mesenchymal stem cell characteristics. The differentiation of neural crest cells into odontoblasts is orchestrated by transcription factors regulating the expression of genes whose enhancers are initially inaccessible. However, the identity of the transcription factors driving the emergence of odontoblast lineages remains elusive. In this study, we identified SALL1, a transcription factor that was particularly expressed in preodontoblasts, polarizing odontoblasts, and secretory odontoblasts in vivo. Knockdown of Sall1 in mDPCs inhibited their odontoblastic differentiation. In order to identify the regulatory network of Sall1, RNA sequencing and an assay for transposase-accessible chromatin with high-throughput sequencing were performed to analyze the genome-wide direct regulatory targets of SALL1. We found that inhibition of Sall1 expression could decrease the accessibility of some chromatin regions associated with odontoblast lineages at embryonic day 16.5, whereas these regions remained unaffected at postnatal day 0.5, suggesting that SALL1 regulates the fate of mDPCs by remodeling open chromatin regions at the early bell stage. Specifically, we found that SALL1 could directly increase the accessibility of cis-regulatory elements near Tgf-β2 and within the Runx2 locus. Moreover, coimmunoprecipitation and proximal ligation assays showed that SALL1 could establish functional interactions with RUNX2. Taken together, our results demonstrated that SALL1 positively regulates the commitment of odontoblast lineages by interacting with RUNX2 and directly activating Tgf-β2 at an early stage.
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Affiliation(s)
- Yuxiu Lin
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory for Oral Biomedicine of Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
| | - Yao Xiao
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory for Oral Biomedicine of Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
| | - ChuJiao Lin
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory for Oral Biomedicine of Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
| | - Qian Zhang
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory for Oral Biomedicine of Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
| | - Shu Zhang
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory for Oral Biomedicine of Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
| | - Fei Pei
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory for Oral Biomedicine of Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
| | - Huan Liu
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory for Oral Biomedicine of Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China.,Department of Periodontology, School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
| | - Zhi Chen
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory for Oral Biomedicine of Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
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11
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Lee S, Kim J, Min H, Seong RH. RORγt-driven T H17 Cell Differentiation Requires Epigenetic Control by the Swi/Snf Chromatin Remodeling Complex. iScience 2020; 23:101106. [PMID: 32434140 PMCID: PMC7235640 DOI: 10.1016/j.isci.2020.101106] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 02/24/2020] [Accepted: 04/22/2020] [Indexed: 12/11/2022] Open
Abstract
Epigenetic regulation, including chromatin accessibility and posttranslational modifications of histones, is of importance for T cell lineage decision. TH17 cells play a critical role in protective mucosal immunity and pathogenic multiple autoimmune diseases. The differentiation of TH17 cells is dictated by a master transcription factor, RORγt. However, the epigenetic mechanism that controls TH17 cell differentiation remains poorly understood. Here we show that the Swi/Snf complex is required for TH17-mediated cytokine production both in vitro and in vivo. We demonstrate that RORγt recruits and forms a complex with the Swi/Snf complex to cooperate for the RORγt-mediated epigenetic modifications of target genes, including both permissive and repressive ones for TH17 cell differentiation. Our findings thus highlight the Swi/Snf complex as an essential epigenetic regulator of TH17 cell differentiation and provide a basis for the understanding of how a master transcription factor RORγt collaborates with the Swi/Snf complex to govern epigenetic regulation. The Swi/Snf complex plays essential roles for TH17 differentiation SRG3/mBAF155 deficiency abrogates the expression of major target genes of RORγt RORγt-dependent TH17 transcriptional program requires the Swi/Snf complex The Swi/Snf complex is required for RORγt-driven histone modifications
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Affiliation(s)
- Sungkyu Lee
- Departement of Biological Sciences, Institute of Molecular Biology and Genetics (Bldg 105), Seoul National University, Gwanak-gu, Gwanak-ro 1, Seoul 151-742-08826, Korea
| | - Jieun Kim
- Departement of Biological Sciences, Institute of Molecular Biology and Genetics (Bldg 105), Seoul National University, Gwanak-gu, Gwanak-ro 1, Seoul 151-742-08826, Korea
| | - Hyungyu Min
- Departement of Biological Sciences, Institute of Molecular Biology and Genetics (Bldg 105), Seoul National University, Gwanak-gu, Gwanak-ro 1, Seoul 151-742-08826, Korea
| | - Rho H Seong
- Departement of Biological Sciences, Institute of Molecular Biology and Genetics (Bldg 105), Seoul National University, Gwanak-gu, Gwanak-ro 1, Seoul 151-742-08826, Korea.
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12
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Transcriptional and epigenetic regulation of immune tolerance: roles of the NF-κB family members. Cell Mol Immunol 2019; 16:315-323. [PMID: 30872809 DOI: 10.1038/s41423-019-0202-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 01/15/2019] [Indexed: 01/06/2023] Open
Abstract
Immune tolerance is a highly regulated state and involves diverse mechanisms. Central to the induction of tolerance is the targeted modulation of T-cell activities (both effector and regulatory), in which transcription factors play a significant role. The nuclear factor kappa-B (NF-κB) family is a family of transcription factors that not only are critically involved in diverse T-cell responses but also are regulated by many mechanisms to maintain tolerance and T-cell homeostasis. NF-κB, as a transcription factor, has been extensively studied in recent decades, and the molecular mechanisms that regulate NF-κB activities have been well documented. However, recent studies have revealed exciting new roles for NF-κB; in addition to its transcriptional activity, NF-κB can also activate diverse epigenetic mechanisms that mediate extensive chromatin remodeling of target genes to regulate T-cell activities. In this review article, we highlight recent discoveries and emerging opportunities in targeting NF-κB family members as well as their associated chromatin modifiers in the induction of immune tolerance and in the clinical treatment of immune diseases.
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13
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van der Kroef M, Castellucci M, Mokry M, Cossu M, Garonzi M, Bossini-Castillo LM, Chouri E, Wichers CGK, Beretta L, Trombetta E, Silva-Cardoso S, Vazirpanah N, Carvalheiro T, Angiolilli C, Bekker CPJ, Affandi AJ, Reedquist KA, Bonte-Mineur F, Zirkzee EJM, Bazzoni F, Radstake TRDJ, Rossato M. Histone modifications underlie monocyte dysregulation in patients with systemic sclerosis, underlining the treatment potential of epigenetic targeting. Ann Rheum Dis 2019; 78:529-538. [PMID: 30793699 DOI: 10.1136/annrheumdis-2018-214295] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 12/24/2018] [Accepted: 01/02/2019] [Indexed: 01/23/2023]
Abstract
BACKGROUND AND OBJECTIVE Systemic sclerosis (SSc) is a severe autoimmune disease, in which the pathogenesis is dependent on both genetic and epigenetic factors. Altered gene expression in SSc monocytes, particularly of interferon (IFN)-responsive genes, suggests their involvement in SSc development. We investigated the correlation between epigenetic histone marks and gene expression in SSc monocytes. METHODS Chromatin immunoprecipitation followed by sequencing (ChIPseq) for histone marks H3K4me3 and H3K27ac was performed on monocytes of nine healthy controls and 14 patients with SSc. RNA sequencing was performed in parallel to identify aberrantly expressed genes and their correlation with the levels of H3K4me3 and H3K27ac located nearby their transcription start sites. ChIP-qPCR assays were used to verify the role of bromodomain proteins, H3K27ac and STATs on IFN-responsive gene expression. RESULTS 1046 and 534 genomic loci showed aberrant H3K4me3 and H3K27ac marks, respectively, in SSc monocytes. The expression of 381 genes was directly and significantly proportional to the levels of such chromatin marks present near their transcription start site. Genes correlated to altered histone marks were enriched for immune, IFN and antiviral pathways and presented with recurrent binding sites for IRF and STAT transcription factors at their promoters. IFNα induced the binding of STAT1 and STAT2 at the promoter of two of these genes, while blocking acetylation readers using the bromodomain BET family inhibitor JQ1 suppressed their expression. CONCLUSION SSc monocytes have altered chromatin marks correlating with their IFN signature. Enzymes modulating these reversible marks may provide interesting therapeutic targets to restore monocyte homeostasis to treat or even prevent SSc.
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Affiliation(s)
- Maarten van der Kroef
- Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Monica Castellucci
- Division of General Pathology, Department of Medicine, University of Verona, Verona, Italy
| | - Michal Mokry
- Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Pediatric Gastroenterology, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Marta Cossu
- Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Marianna Garonzi
- Department of Biotechnology, University of Verona, Verona, Italy
| | - Lara M Bossini-Castillo
- Consejo Superior de Investigaciones Científicas (IPBLN-CSIC), Instituto de Parasitología y Biomedicina López-Neyra, PTS Granada, Granada, Spain.,Department of cellular genetics, Wellcome Trust Sanger Institute, Cambridge, UK
| | - Eleni Chouri
- Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Catharina G K Wichers
- Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Lorenzo Beretta
- Referral Center for Systemic Autoimmune Diseases, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico di Milano, Milan, Italy
| | - Elena Trombetta
- Flow Cytometry Service, Analysis Laboratory, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico di Milano, Milan, Italy
| | - Sandra Silva-Cardoso
- Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Nadia Vazirpanah
- Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Tiago Carvalheiro
- Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Chiara Angiolilli
- Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Cornelis P J Bekker
- Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Alsya J Affandi
- Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Kris A Reedquist
- Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Femke Bonte-Mineur
- Department of Rheumatology and Clinical Immunology, Maasstad Hospital, Rotterdam, The Netherlands
| | - Els J M Zirkzee
- Department of Rheumatology and Clinical Immunology, Maasstad Hospital, Rotterdam, The Netherlands
| | - Flavia Bazzoni
- Division of General Pathology, Department of Medicine, University of Verona, Verona, Italy
| | - Timothy R D J Radstake
- Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands .,Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Marzia Rossato
- Laboratory of Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Biotechnology, University of Verona, Verona, Italy
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14
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Caligiuri G. The comeback of immunoregulatory receptors on memory and aging CD8+ T cells: The wisdom of youth. J Leukoc Biol 2018; 104:879-881. [DOI: 10.1002/jlb.2ce0718-263r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/07/2018] [Accepted: 08/10/2018] [Indexed: 12/23/2022] Open
Affiliation(s)
- Giuseppina Caligiuri
- Cardiovascular Immunobiology Team; Laboratory for Vascular Translational Science; Paris France
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15
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Long C, Lai Y, Li J, Huang J, Zou C. LPS promotes HBO1 stability via USP25 to modulate inflammatory gene transcription in THP-1 cells. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2018; 1861:773-782. [PMID: 30745998 DOI: 10.1016/j.bbagrm.2018.08.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The histone acetyltransferase HBO1 (Histone acetyltransferase binding to origin recognition complex 1, Myst2/Kat7) participates in a range of life processes including DNA replication and tumorigenesis. Recent studies revealed that HBO1 is involved in gene transcriptional activation. However, the molecular behavior of HBO1 in inflammation is yet to be studied. Here we report that endotoxin lipopolysaccharide (LPS) elevates HBO1 protein level via up-regulating UPS25 (ubiquitin specific peptidase 25) and alters inflammatory gene transcription in THP-1 monocytes and in human primary macrophages. LPS protects HBO1 from ubiquitin proteasomal degradation without significantly altering its transcription. By immunoprecipitation, we identified that HBO1 associates with a deubiquitinating enzyme USP25 in THP-1 cells. LPS increases protein level of USP25 resulting in accumulation of HBO1 by suppression of HBO1 ubiquitination. Stabilized-HBO1 modulates inflammatory gene transcription in THP-1 cells. These findings indicate that USP25 promotes stability of HBO1 in bacterial infection thereby enhances HBO1-mediated inflammatory gene transcription.
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Affiliation(s)
- Chen Long
- Department of Minimally Invasive Surgery, the Second Xiangya Hospital, Central South University, Changsha, Hunan, China 410011.,Acute Lung Injury Center of Excellence, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA 15213
| | - Yandong Lai
- Acute Lung Injury Center of Excellence, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA 15213
| | - Jin Li
- Acute Lung Injury Center of Excellence, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA 15213
| | - Jiangsheng Huang
- Department of Minimally Invasive Surgery, the Second Xiangya Hospital, Central South University, Changsha, Hunan, China 410011
| | - Chunbin Zou
- Acute Lung Injury Center of Excellence, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA 15213
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16
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Arama C, Quin JE, Kouriba B, Östlund Farrants AK, Troye-Blomberg M, Doumbo OK. Epigenetics and Malaria Susceptibility/Protection: A Missing Piece of the Puzzle. Front Immunol 2018; 9:1733. [PMID: 30158923 PMCID: PMC6104485 DOI: 10.3389/fimmu.2018.01733] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 07/12/2018] [Indexed: 12/22/2022] Open
Abstract
A better understanding of stable changes in regulation of gene expression that result from epigenetic events is of great relevance in the development of strategies to prevent and treat infectious diseases. Histone modification and DNA methylation are key epigenetic mechanisms that can be regarded as marks, which ensure an accurate transmission of the chromatin states and gene expression profiles over generations of cells. There is an increasing list of these modifications, and the complexity of their action is just beginning to be understood. It is clear that the epigenetic landscape plays a fundamental role in most biological processes that involve the manipulation and expression of DNA. Although the molecular mechanism of gene regulation is relatively well understood, the hierarchical order of events and dependencies that lead to protection against infection remain largely unknown. In this review, we propose that host epigenetics is an essential, though relatively under studied, factor in the protection or susceptibility to malaria.
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Affiliation(s)
- Charles Arama
- Malaria Research and Training Centre, Department of Epidemiology of Parasitic Diseases, International Center of Excellence in Research, University of Sciences, Technique and Technology of Bamako, Bamako, Mali
| | - Jaclyn E Quin
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Bourèma Kouriba
- Malaria Research and Training Centre, Department of Epidemiology of Parasitic Diseases, International Center of Excellence in Research, University of Sciences, Technique and Technology of Bamako, Bamako, Mali
| | | | - Marita Troye-Blomberg
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Ogobara K Doumbo
- Malaria Research and Training Centre, Department of Epidemiology of Parasitic Diseases, International Center of Excellence in Research, University of Sciences, Technique and Technology of Bamako, Bamako, Mali
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17
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Palumbo D, Affinito O, Monticelli A, Cocozza S. DNA Methylation variability among individuals is related to CpGs cluster density and evolutionary signatures. BMC Genomics 2018; 19:229. [PMID: 29606093 PMCID: PMC5880022 DOI: 10.1186/s12864-018-4618-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 03/23/2018] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND In recent years, epigenetics has gained a central role in the understanding of the process of natural selection. It is now clear how environmental impacts on the methylome could promote methylation variability with direct effects on disease etiology as well as phenotypic and genotypic variations in evolutionary processes. To identify possible factors influencing inter-individual methylation variability, we studied methylation values standard deviation of 166 healthy individuals searching for possible associations with genomic features and evolutionary signatures. RESULTS We analyzed methylation variability values in relation to CpG cluster density and we found a strong association between them (p-value < 2.2 × 10- 16). Furthermore, we found that genes related to CpGs with high methylation variability values were enriched for immunological pathways; instead, those associated with low ones were enriched for pathways related to basic cellular functions. Finally, we found an association between methylation variability values and signals of both ancient (p-value < 2.2 × 10- 16) and recent selective pressure (p-value < 1 × 10- 4). CONCLUSION Our results indicate the presence of an intricate interplay between genetics, epigenetic code and evolutionary constraints in humans.
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Affiliation(s)
- Domenico Palumbo
- Department of Molecular Medicine and Medical Biotechnology (DMMBM), University of Naples “Federico II”, Naples, Italy
| | - Ornella Affinito
- Department of Molecular Medicine and Medical Biotechnology (DMMBM), University of Naples “Federico II”, Naples, Italy
| | - Antonella Monticelli
- Institute for Experimental Endocrinology and Oncology (IEOS) “Gaetano Salvatore”, CNR, Naples, Italy
| | - Sergio Cocozza
- Department of Molecular Medicine and Medical Biotechnology (DMMBM), University of Naples “Federico II”, Naples, Italy
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18
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Keller IS, Salzburger W, Roth O. Parental investment matters for maternal and offspring immune defense in the mouthbrooding cichlid Astatotilapia burtoni. BMC Evol Biol 2017; 17:264. [PMID: 29262789 PMCID: PMC5738712 DOI: 10.1186/s12862-017-1109-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 12/06/2017] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Parental care, while increasing parental fitness through offspring survival, also bears cost to the care-giving parent. Consequentially, trade offs between parental care and other vitally important traits, such as the immune system seem evident. In co-occurring phases of parental care and immunological challenges negative consequences through a resource allocation trade off on both the parental and the offspring conditions can be predicted. While the immune system reflects parental stress conditions, parental immunological investments also boost offspring survival via the transfer of immunological substances (trans-generational immune priming). We investigated this relationship in the mouthbrooding East African cichlid Astotatilapia burtoni. Prior to mating, females were exposed to an immunological activation, while others remained immunologically naïve. Correspondingly, the immunological status of females was either examined directly after reproduction or after mouthbrooding had ceased. Offspring from both groups were exposed to immunological challenges to assess the extent of trans-generational immune priming. As proxy for immune status, cellular immunological activity and gene expression were determined. RESULTS Both reproducing and mouthbrooding females allocate their resources towards reproduction. While upon reproduction the innate immune system was impeded, mouthbrooding females showed an attenuation of inflammatory components. Juveniles from immune challenged mouthbrooding females showed downregulation of immune and life history candidate genes, implying a limitation of trans-generational plasticity when parents experience stress during the costly reproductive phase. CONCLUSION Our results provide evidence that both parental investment via mouthbrooding and the rise of the immunological activity upon an immune challenge are costly traits. If applied simultaneously, not only mothers seem to be impacted in their performance, but also offspring are impeded in their ability to react upon a potentially virulent pathogen exposure.
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Affiliation(s)
- Isabel S. Keller
- Evolutionary Ecology of Marine Fishes, GEOMAR - Helmholtz Centre for Ocean Research, Kiel, Germany
| | | | - Olivia Roth
- Evolutionary Ecology of Marine Fishes, GEOMAR - Helmholtz Centre for Ocean Research, Kiel, Germany
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19
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Randino R, Gazzerro P, Mazitschek R, Rodriquez M. Synthesis and biological evaluation of Santacruzamate-A based analogues. Bioorg Med Chem 2017; 25:6486-6491. [DOI: 10.1016/j.bmc.2017.10.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 10/10/2017] [Accepted: 10/19/2017] [Indexed: 01/17/2023]
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20
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Ma JH, Song SH, Guo M, Zhou J, Liu F, Peng L, Fu ZR. Long-term exposure to PM2.5 lowers influenza virus resistance via down-regulating pulmonary macrophage Kdm6a and mediates histones modification in IL-6 and IFN-β promoter regions. Biochem Biophys Res Commun 2017; 493:1122-1128. [PMID: 28887033 DOI: 10.1016/j.bbrc.2017.09.013] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 09/04/2017] [Indexed: 11/30/2022]
Abstract
Atmospheric particulates, especially PM2.5, not only damage the respiratory system, but also play important roles in pulmonary immunity. China is influenced by atmospheric diffusion conditions, industrial manufacturers, and heating and discharging. PM2.5 levels in the air rise substantially in the winter, which is also a period of flu high-incidence. Although an epidemiological link exists between PM2.5 and flu, we do not understand how long-term PM2.5 inhalation affects pulmonary immunity and the influenza virus response. Our study has prepared an in vivo PM2.5 mouse pharyngeal wall drop-in model and has found that PM2.5 exposure leads to mouse inflammatory injuries and furthers influenza A infection. Our results suggest that short-term exposure to PM2.5 significantly enhances the survival rate of influenza A-contaminated mice, while long-term PM2.5 inhalation lowers the capacity of pulmonary macrophages to secrete IL-6 and IFN-β. A disorder in the pulmonary innate defense system results in increased death rates following influenza infection. On a macromolecular level, this mechamism involves Kdm6a down-regulation after long-term exposure to PM 2.5 and a resultant increase in H3K4 and H3K9 methylation in IL-6 and IFN-β promoter regions. In summary, PM2.5 causes injuries of lung tissue cells and downregulates immune defense mechanisms in the lung.
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Affiliation(s)
- Jing-Hui Ma
- Shanghai Key Laboratory of Meteorology and Health, Shanghai Meteorological Bureau, Shanghai 200030, People's Republic of China
| | - Shao-Hua Song
- Organ Transplantation Center, Changzheng Hospital, Second Military Medical University, Shanghai 200003, People's Republic of China
| | - Meng Guo
- Organ Transplantation Center, Changzheng Hospital, Second Military Medical University, Shanghai 200003, People's Republic of China
| | - Ji Zhou
- Shanghai Key Laboratory of Meteorology and Health, Shanghai Meteorological Bureau, Shanghai 200030, People's Republic of China
| | - Fang Liu
- Organ Transplantation Center, Changzheng Hospital, Second Military Medical University, Shanghai 200003, People's Republic of China
| | - Li Peng
- Shanghai Key Laboratory of Meteorology and Health, Shanghai Meteorological Bureau, Shanghai 200030, People's Republic of China.
| | - Zhi-Ren Fu
- Organ Transplantation Center, Changzheng Hospital, Second Military Medical University, Shanghai 200003, People's Republic of China.
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22
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Abstract
Coronaviruses (CoV) comprise a large group of emerging human and animal pathogens, including the highly pathogenic severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respiratory syndrome coronavirus (MERS-CoV) strains. The molecular mechanisms regulating emerging coronavirus pathogenesis are complex and include virus–host interactions associated with entry, replication, egress and innate immune control. Epigenetics research investigates the genetic and non-genetic factors that regulate phenotypic variation, usually caused by external and environmental factors that alter host expression patterns and performance without any change in the underlying genotype. Epigenetic modifications, such as histone modifications, DNA methylation, chromatin remodeling, and non-coding RNAs, function as important regulators that remodel host chromatin, altering host expression patterns and networks in a highly flexible manner. For most of the past two and a half decades, research has focused on the molecular mechanisms by which RNA viruses antagonize the signaling and sensing components that regulate induction of the host innate immune and antiviral defense programs upon infection. More recently, a growing body of evidence supports the hypothesis that viruses, even lytic RNA viruses that replicate in the cytoplasm, have developed intricate, highly evolved, and well-coordinated processes that are designed to regulate the host epigenome, and control host innate immune antiviral defense processes, thereby promoting robust virus replication and pathogenesis. In this article, we discuss the strategies that are used to evaluate the mechanisms by which viruses regulate the host epigenome, especially focusing on highly pathogenic respiratory RNA virus infections as a model. By combining measures of epigenome reorganization with RNA and proteomic datasets, we articulate a spatial-temporal data integration approach to identify regulatory genomic clusters and regions that play a crucial role in the host’s innate immune response, thereby defining a new viral antagonism mechanism following emerging coronavirus infection.
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The Role of Epigenetic Regulation in Transcriptional Memory in the Immune System. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2017; 106:43-69. [DOI: 10.1016/bs.apcsb.2016.09.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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24
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Histone Deacetylase Inhibition Protects Mice Against Lethal Postinfluenza Pneumococcal Infection. Crit Care Med 2016; 44:e980-7. [DOI: 10.1097/ccm.0000000000001821] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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25
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Carson WF, Kunkel SL. Regulation of Cellular Immune Responses in Sepsis by Histone Modifications. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2016; 106:191-225. [PMID: 28057212 DOI: 10.1016/bs.apcsb.2016.08.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Severe sepsis, septic shock, and related inflammatory syndromes are driven by the aberrant expression of proinflammatory mediators by immune cells. During the acute phase of sepsis, overexpression of chemokines and cytokines drives physiological stress leading to organ failure and mortality. Following recovery from sepsis, the immune system exhibits profound immunosuppression, evidenced by an inability to produce the same proinflammatory mediators that are required for normal responses to infectious microorganisms. Gene expression in inflammatory responses is influenced by the transcriptional accessibility of the chromatin, with histone posttranslational modifications determining whether inflammatory gene loci are set to transcriptionally active, repressed, or poised states. Experimental evidence indicates that histone modifications play a central role in governing the cytokine storm of severe sepsis, and that aberrant chromatin modifications induced during the acute phase of sepsis may mediate chronic immunosuppression in sepsis survivors. This review will focus on the role of histone modifications in governing immune responses in severe sepsis, with an emphasis on specific leukocyte subsets and the histone modifications observed in these cells during chronic stages of sepsis. Additionally, the expression and function of chromatin-modifying enzymes (CMEs) will be discussed in the context of severe sepsis, as potential mediators of epigenetic regulation of gene expression in sepsis responses. In summary, this review will argue for the use of chromatin modifications and CME expression in leukocytes as potential biomarkers of immunosuppression in patients with severe sepsis.
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Affiliation(s)
- W F Carson
- University of Michigan Medical School, Ann Arbor, MI, United States.
| | - S L Kunkel
- University of Michigan Medical School, Ann Arbor, MI, United States
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26
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Pink M, Ratsch BA, Mardahl M, Durek P, Polansky JK, Karl M, Baumgrass R, Wallner S, Cadenas C, Gianmoena K, Floess S, Chen W, Nordstroem K, Tierling S, Olek S, Walter J, Hamann A, Syrbe U. Imprinting of Skin/Inflammation Homing in CD4+ T Cells Is Controlled by DNA Methylation within the Fucosyltransferase 7 Gene. THE JOURNAL OF IMMUNOLOGY 2016; 197:3406-3414. [PMID: 27591321 DOI: 10.4049/jimmunol.1502434] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 08/08/2016] [Indexed: 11/19/2022]
Abstract
E- and P-selectin ligands (E- and P-ligs) guide effector memory T cells into skin and inflamed regions, mediate the inflammatory recruitment of leukocytes, and contribute to the localization of hematopoietic precursor cells. A better understanding of their molecular regulation is therefore of significant interest with regard to therapeutic approaches targeting these pathways. In this study, we examined the transcriptional regulation of fucosyltransferase 7 (FUT7), an enzyme crucial for generation of the glycosylated E- and P-ligs. We found that high expression of the coding gene fut7 in murine CD4+ T cells correlates with DNA demethylation within a minimal promoter in skin/inflammation-seeking effector memory T cells. Retinoic acid, a known inducer of the gut-homing phenotype, abrogated the activation-induced demethylation of this region, which contains a cAMP responsive element. Methylation of the promoter or mutation of the cAMP responsive element abolished promoter activity and the binding of CREB, confirming the importance of this region and of its demethylation for fut7 transcription in T cells. Furthermore, studies on human CD4+ effector memory T cells confirmed demethylation within FUT7 corresponding to high FUT7 expression. Monocytes showed an even more extensive demethylation of the FUT7 gene whereas hepatocytes, which lack selectin ligand expression, exhibited extensive methylation. In conclusion, we show that DNA demethylation within the fut7 gene controls selectin ligand expression in mice and humans, including the inducible topographic commitment of T cells for skin and inflamed sites.
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Affiliation(s)
- Matthias Pink
- Experimental Rheumatology, German Rheumatism Research Center, 10117 Berlin, Germany
| | - Boris A Ratsch
- Experimental Rheumatology, German Rheumatism Research Center, 10117 Berlin, Germany
| | - Maibritt Mardahl
- Experimental Rheumatology, German Rheumatism Research Center, 10117 Berlin, Germany
| | - Pawel Durek
- Experimental Rheumatology, German Rheumatism Research Center, 10117 Berlin, Germany
| | - Julia K Polansky
- Experimental Rheumatology, German Rheumatism Research Center, 10117 Berlin, Germany
| | - Martin Karl
- Signal Transduction, German Rheumatism Research Center, 10117 Berlin, Germany
| | - Ria Baumgrass
- Signal Transduction, German Rheumatism Research Center, 10117 Berlin, Germany
| | - Stefan Wallner
- Institute of Clinical and Laboratory Medicine, University Hospital Regensburg, 93042 Regensburg, Germany
| | - Cristina Cadenas
- Leibniz Research Center for Working Environment and Human Factors, 44139 Dortmund, Germany
| | - Kathrin Gianmoena
- Leibniz Research Center for Working Environment and Human Factors, 44139 Dortmund, Germany
| | - Stefan Floess
- Experimental Immunology, Helmholz Center for Infection Research, 38124 Braunschweig, Germany
| | - Wei Chen
- Max Delbrück Center for Molecular Medicine, 13092 Berlin, Germany
| | - Karl Nordstroem
- Laboratory of Epigenetics, Saarland University, 66123 Saarbrücken, Germany
| | - Sascha Tierling
- Laboratory of Epigenetics, Saarland University, 66123 Saarbrücken, Germany
| | - Sven Olek
- Epiontis GmbH, 12489 Berlin, Germany; and
| | - Jörn Walter
- Laboratory of Epigenetics, Saarland University, 66123 Saarbrücken, Germany
| | - Alf Hamann
- Experimental Rheumatology, German Rheumatism Research Center, 10117 Berlin, Germany
| | - Uta Syrbe
- Medical Clinic for Gastroenterology, Infectious Diseases, and Rheumatology, Charité University Hospital, 12200 Berlin, Germany
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Polverino F, Seys LJM, Bracke KR, Owen CA. B cells in chronic obstructive pulmonary disease: moving to center stage. Am J Physiol Lung Cell Mol Physiol 2016; 311:L687-L695. [PMID: 27542809 DOI: 10.1152/ajplung.00304.2016] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 08/15/2016] [Indexed: 12/22/2022] Open
Abstract
Chronic inflammatory responses in the lungs contribute to the development and progression of chronic obstructive pulmonary disease (COPD). Although research studies focused initially on the contributions of the innate immune system to the pathogenesis of COPD, more recent studies have implicated adaptive immune responses in COPD. In particular, studies have demonstrated increases in B cell counts and increases in the number and size of B cell-rich lymphoid follicles in COPD lungs that correlate directly with COPD severity. There are also increases in lung levels of mediators that promote B cell maturation, activation, and survival in COPD patients. B cell products such as autoantibodies directed against lung cells, components of cells, and extracellular matrix proteins are also present in COPD lungs. These autoantibodies may contribute to lung inflammation and injury in COPD patients, in part, by forming immune complexes that activate complement components. Studies of B cell-deficient mice and human COPD patients have linked B cells most strongly to the emphysema phenotype. However, B cells have protective activities during acute exacerbations of COPD by promoting adaptive immune responses that contribute to host defense against pathogens. This review outlines the evidence that links B cells and B cell-rich lymphoid follicles to the pathogenesis of COPD and the mechanisms involved. It also reviews the potential and limitations of B cells as therapeutic targets to slow the progression of human COPD.
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Affiliation(s)
- Francesca Polverino
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts; COPD Program, Lovelace Respiratory Research Institute, Albuquerque, New Mexico; University of Parma, Parma, Italy; and
| | - Leen J M Seys
- Laboratory for Translational Research in Obstructive Pulmonary Diseases, Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium
| | - Ken R Bracke
- Laboratory for Translational Research in Obstructive Pulmonary Diseases, Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium
| | - Caroline A Owen
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts; COPD Program, Lovelace Respiratory Research Institute, Albuquerque, New Mexico;
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28
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Osinalde N, Mitxelena J, Sánchez-Quiles V, Akimov V, Aloria K, Arizmendi JM, Zubiaga AM, Blagoev B, Kratchmarova I. Nuclear Phosphoproteomic Screen Uncovers ACLY as Mediator of IL-2-induced Proliferation of CD4+ T lymphocytes. Mol Cell Proteomics 2016; 15:2076-92. [PMID: 27067055 DOI: 10.1074/mcp.m115.057158] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Indexed: 02/03/2023] Open
Abstract
Anti-cancer immunotherapies commonly rely on the use of interleukin-2 (IL-2) to promote the expansion of T lymphocytes. IL-2- dependent proliferation is the culmination of a complex network of phosphorylation-driven signaling events that impact on gene transcription through mechanisms that are not clearly understood. To study the role of IL-2 in the regulation of nuclear protein function we have performed an unbiased mass spectrometry-based study of the nuclear phosphoproteome of resting and IL-2-treated CD4(+) T lymphocytes. We detected 8521distinct phosphosites including many that are not yet reported in curated phosphorylation databases. Although most phosphorylation sites remained unaffected upon IL-2 treatment, 391 sites corresponding to 288 gene products showed robust IL-2-dependent regulation. Importantly, we show that ATP-citrate lyase (ACLY) is a key phosphoprotein effector of IL-2-mediated T-cell responses. ACLY becomes phosphorylated on serine 455 in T lymphocytes upon IL-2-driven activation of AKT, and depletion or inactivation of ACLY compromises IL-2-promoted T-cell growth. Mechanistically, we demonstrate that ACLY is required for enhancing histone acetylation levels and inducing the expression of cell cycle regulating genes in response to IL-2. Thus, the metabolic enzyme ACLY emerges as a bridge between cytokine signaling and proliferation of T lymphocytes, and may be an attractive candidate target for the development of more efficient anti-cancer immunotherapies.
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Affiliation(s)
- Nerea Osinalde
- From the ‡Department of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense M, Denmark
| | - Jone Mitxelena
- §Department of Genetics, Physical Anthropology and Animal Physiology, University of the Basque Country, UPV/EHU, 48940 Leioa, Spain
| | - Virginia Sánchez-Quiles
- From the ‡Department of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense M, Denmark
| | - Vyacheslav Akimov
- From the ‡Department of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense M, Denmark
| | - Kerman Aloria
- ¶Proteomics Core Facility-SGIKER, University of the Basque Country, UPV/EHU, 48940 Leioa, Spain
| | - Jesus M Arizmendi
- ‖Department of Biochemistry and Molecular Biology, University of the Basque Country, UPV/EHU, 48940 Leioa, Spain
| | - Ana M Zubiaga
- §Department of Genetics, Physical Anthropology and Animal Physiology, University of the Basque Country, UPV/EHU, 48940 Leioa, Spain
| | - Blagoy Blagoev
- From the ‡Department of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense M, Denmark
| | - Irina Kratchmarova
- From the ‡Department of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense M, Denmark;
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Abstract
Allergic reactions to pets have been recognized for at least a hundred years. Yet our understanding of the effects of all of the interactions between pet exposures and human immune responses continues to grow. Allergists, epidemiologists, and immunologists have spent years trying to better understand how exposures to pet allergens lead to allergic sensitization (the production of allergen-specific immunoglobulin class E [IgE] antibodies) and subsequent allergic disease. A major new development in this understanding is the recognition that pet exposures consist of not only allergen exposures but also changes in microbial exposures. Exposures to certain pet-associated microbes, especially in the neonatal period, appear to be able to dramatically alter how a child’s immune system develops and this in turn reduces the risk of allergic sensitization and disease. An exciting challenge in the next few years will be to see whether these changes can be developed into a realistic preventative strategy with the expectation of significantly reducing allergic disease, especially asthma.
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30
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Aresta-Branco F, Pimenta S, Figueiredo LM. A transcription-independent epigenetic mechanism is associated with antigenic switching in Trypanosoma brucei. Nucleic Acids Res 2015; 44:3131-46. [PMID: 26673706 PMCID: PMC4838347 DOI: 10.1093/nar/gkv1459] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 11/28/2015] [Indexed: 12/27/2022] Open
Abstract
Antigenic variation in Trypanosoma brucei relies on periodic switching of variant surface glycoproteins (VSGs), which are transcribed monoallelically by RNA polymerase I from one of about 15 bloodstream expression sites (BES). Chromatin of the actively transcribed BES is depleted of nucleosomes, but it is unclear if this open conformation is a mere consequence of a high rate of transcription, or whether it is maintained by a transcription-independent mechanism. Using an inducible BES-silencing reporter strain, we observed that chromatin of the active BES remains open for at least 24 hours after blocking transcription. This conformation is independent of the cell-cycle stage, but dependent upon TDP1, a high mobility group box protein. For two days after BES silencing, we detected a transient and reversible derepression of several silent BESs within the population, suggesting that cells probe other BESs before commitment to one, which is complete by 48 hours. FACS sorting and subsequent subcloning confirmed that probing cells are switching intermediates capable of returning to the original BES, switch to the probed BES or to a different BES. We propose that regulation of BES chromatin structure is an epigenetic mechanism important for successful antigenic switching.
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Affiliation(s)
- Francisco Aresta-Branco
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisboa 1649-028, Portugal
| | - Silvia Pimenta
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisboa 1649-028, Portugal
| | - Luisa M Figueiredo
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisboa 1649-028, Portugal
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Tennant BR, Hurley P, Dhillon J, Gill A, Whiting C, Hoffman BG. The TrxG Complex Mediates Cytokine Induced De Novo Enhancer Formation in Islets. PLoS One 2015; 10:e0141470. [PMID: 26505193 PMCID: PMC4623983 DOI: 10.1371/journal.pone.0141470] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 10/08/2015] [Indexed: 01/06/2023] Open
Abstract
To better understand how β-cells respond to proinflammatory cytokines we mapped the locations of histone 3 lysine 4 monomethylation (H3K4me1), a post-translational histone modification enriched at active and poised cis-regulatory regions, in IFNγ, Il-1β, and TNFα treated pancreatic islets. We identified 96,721 putative cis-regulatory loci, of which 3,590 were generated de novo, 3,204 had increased H3K4me1, and 5,354 had decreased H3K4me1 in IFNγ, Il-1β, and TNFα exposed islets. Roughly 10% of the de novo and increased regions were enriched for the repressive histone modification histone 3 lysine 27 trimethylation (H3K27me3) in untreated cells, and these were frequently associated with chemokine genes. We show that IFNγ, Il-1β, and TNFα exposure overcomes this repression and induces chemokine gene activation in as little as three hours, and that this expression persists for days in absence of continued IFNγ, Il-1β, and TNFα exposure. We implicate trithorax group (TrxG) complexes as likely players in the conversion of these repressed loci to an active state. To block the activity of these complexes, we suppressed Wdr5, a core component of the TrxG complexes, and used the H3K27me3 demethylase inhibitor GSK-J4. We show that GSK-J4 is particularly effective in blunting IFNγ, Il-1β, and TNFα-induced chemokine gene expression in β-cells; however, it induced significant islet-cell apoptosis and β-cell dysfunction. Wdr5 suppression also reduced IFNγ, Il-1β, and TNFα induced chemokine gene expression in β-cells without affecting islet-cell survival or β-cell function after 48hrs, but did begin to increase islet-cell apoptosis and β-cell dysfunction after four days of treatment. Taken together these data suggest that the TrxG complex is potentially a viable target for preventing cytokine induced chemokine gene expression in β-cells.
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Affiliation(s)
- Bryan R. Tennant
- Child and Family Research Institute, British Columbia Children’s Hospital and Sunny Hill Health Centre, 950 W28th Avenue, Vancouver, British Columbia, Canada
| | - Peter Hurley
- Child and Family Research Institute, British Columbia Children’s Hospital and Sunny Hill Health Centre, 950 W28th Avenue, Vancouver, British Columbia, Canada
| | - Jasmine Dhillon
- Child and Family Research Institute, British Columbia Children’s Hospital and Sunny Hill Health Centre, 950 W28th Avenue, Vancouver, British Columbia, Canada
| | - Amol Gill
- Child and Family Research Institute, British Columbia Children’s Hospital and Sunny Hill Health Centre, 950 W28th Avenue, Vancouver, British Columbia, Canada
| | - Cheryl Whiting
- Child and Family Research Institute, British Columbia Children’s Hospital and Sunny Hill Health Centre, 950 W28th Avenue, Vancouver, British Columbia, Canada
| | - Brad G. Hoffman
- Child and Family Research Institute, British Columbia Children’s Hospital and Sunny Hill Health Centre, 950 W28th Avenue, Vancouver, British Columbia, Canada
- Department of Surgery, University of British Columbia, Vancouver, B.C., Canada
- * E-mail:
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33
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Lim PS, Sutton CR, Rao S. Protein kinase C in the immune system: from signalling to chromatin regulation. Immunology 2015; 146:508-22. [PMID: 26194700 DOI: 10.1111/imm.12510] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 06/29/2015] [Accepted: 07/15/2015] [Indexed: 12/12/2022] Open
Abstract
Protein kinase C (PKC) form a key family of enzymes involved in signalling pathways that specifically phosphorylates substrates at serine/threonine residues. Phosphorylation by PKC is important in regulating a variety of cellular events such as cell proliferation and the regulation of gene expression. In the immune system, PKCs are involved in regulating signal transduction pathways important for both innate and adaptive immunity, ultimately resulting in the expression of key immune genes. PKCs act as mediators during immune cell signalling through the immunological synapse. PKCs are traditionally known to be cytoplasmic signal transducers and are well embedded in the signalling pathways of cells to mediate the cells' response to a stimulus from the plasma membrane to the nucleus. PKCs are also found to transduce signals within the nucleus, a process that is distinct from the cytoplasmic signalling pathway. There is now growing evidence suggesting that PKC can directly regulate gene expression programmes through a non-traditional role as nuclear kinases. In this review, we will focus on the role of PKCs as key cytoplasmic signal transducers in immune cell signalling, as well as its role in nuclear signal transduction. We will also highlight recent evidence for its newly discovered regulatory role in the nucleus as a chromatin-associated kinase.
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Affiliation(s)
- Pek Siew Lim
- Discipline of Biomedical Sciences, Faculty of Applied Science, University of Canberra, Canberra, ACT, Australia
| | - Christopher Ray Sutton
- Discipline of Biomedical Sciences, Faculty of Applied Science, University of Canberra, Canberra, ACT, Australia
| | - Sudha Rao
- Discipline of Biomedical Sciences, Faculty of Applied Science, University of Canberra, Canberra, ACT, Australia
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34
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Felts SJ, Van Keulen VP, Scheid AD, Allen KS, Bradshaw RK, Jen J, Peikert T, Middha S, Zhang Y, Block MS, Markovic SN, Pease LR. Gene expression patterns in CD4+ peripheral blood cells in healthy subjects and stage IV melanoma patients. Cancer Immunol Immunother 2015; 64:1437-47. [PMID: 26245876 DOI: 10.1007/s00262-015-1745-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Accepted: 07/18/2015] [Indexed: 01/09/2023]
Abstract
Melanoma patients exhibit changes in immune responsiveness in the local tumor environment, draining lymph nodes, and peripheral blood. Immune-targeting therapies are revolutionizing melanoma patient care increasingly, and studies show that patients derive clinical benefit from these newer agents. Nonetheless, predicting which patients will benefit from these costly therapies remains a challenge. In an effort to capture individual differences in immune responsiveness, we are analyzing patterns of gene expression in human peripheral blood cells using RNAseq. Focusing on CD4+ peripheral blood cells, we describe multiple categories of immune regulating genes, which are expressed in highly ordered patterns shared by cohorts of healthy subjects and stage IV melanoma patients. Despite displaying conservation in overall transcriptome structure, CD4+ peripheral blood cells from melanoma patients differ quantitatively from healthy subjects in the expression of more than 2000 genes. Moreover, 1300 differentially expressed genes are found in transcript response patterns following activation of CD4+ cells ex vivo, suggesting that widespread functional discrepancies differentiate the immune systems of healthy subjects and melanoma patients. While our analysis reveals that the transcriptome architecture characteristic of healthy subjects is maintained in cancer patients, the genes expressed differentially among individuals and across cohorts provide opportunities for understanding variable immune states as well as response potentials, thus establishing a foundation for predicting individual responses to stimuli such as immunotherapeutic agents.
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Affiliation(s)
- Sara J Felts
- Department of Immunology, Mayo Clinic College of Medicine, 200 First Street SW, Rochester, MN, 55905, USA
| | - Virginia P Van Keulen
- Department of Immunology, Mayo Clinic College of Medicine, 200 First Street SW, Rochester, MN, 55905, USA
| | - Adam D Scheid
- Department of Immunology, Mayo Clinic College of Medicine, 200 First Street SW, Rochester, MN, 55905, USA
| | - Kathleen S Allen
- Department of Immunology, Mayo Clinic College of Medicine, 200 First Street SW, Rochester, MN, 55905, USA
| | - Renee K Bradshaw
- Department of Oncology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Jin Jen
- Division of Experimental Pathology and Laboratory Medicine, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Tobias Peikert
- Department of Immunology, Mayo Clinic College of Medicine, 200 First Street SW, Rochester, MN, 55905, USA
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Sumit Middha
- Division of Biomedical Statistics and Informatics, Department of Health Sciences, Mayo Clinic College of Medicine, Rochester, MN, USA
- Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Yuji Zhang
- Division of Biomedical Statistics and Informatics, Department of Health Sciences, Mayo Clinic College of Medicine, Rochester, MN, USA
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Matthew S Block
- Department of Immunology, Mayo Clinic College of Medicine, 200 First Street SW, Rochester, MN, 55905, USA
- Department of Oncology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Svetomir N Markovic
- Department of Immunology, Mayo Clinic College of Medicine, 200 First Street SW, Rochester, MN, 55905, USA
- Department of Oncology, Mayo Clinic College of Medicine, Rochester, MN, USA
- Division of Hematology, Department of Internal Medicine, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Larry R Pease
- Department of Immunology, Mayo Clinic College of Medicine, 200 First Street SW, Rochester, MN, 55905, USA.
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Hill EV, Ng THS, Burton BR, Oakley CM, Malik K, Wraith DC. Glycogen synthase kinase-3 controls IL-10 expression in CD4(+) effector T-cell subsets through epigenetic modification of the IL-10 promoter. Eur J Immunol 2015; 45:1103-15. [PMID: 25627813 PMCID: PMC4405077 DOI: 10.1002/eji.201444661] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 12/09/2014] [Accepted: 01/23/2015] [Indexed: 01/07/2023]
Abstract
The serine/threonine kinase glycogen synthase kinase-3 (GSK3) plays an important role in balancing pro- and anti-inflammatory cytokines. We have examined the role of GSK3 in production of IL-10 by subsets of CD4(+) T helper cells. Treatment of naive murine CD4(+) T cells with GSK3 inhibitors did not affect their production of IL-10. However, treatment of Th1 and Th2 cells with GSK3 inhibitors dramatically increased production of IL-10. GSK3 inhibition also led to upregulation of IL-10 among Th1, Th2, and Th17 subsets isolated from human blood. The encephalitogenic potential of GSK3 inhibitor treated murine Th1 cells was significantly reduced in adoptive transfer experiments by an IL-10-dependent mechanism. Analysis of the murine IL-10 promoter in response to inhibition of GSK3 in Th1 cells showed modification to a transcriptionally active state indicated by changes in histone H3 acetylation and methylation. Additionally, GSK3 inhibition increased expression of the transcription factors c-Maf, Nfil3, and GATA3, correlating with the increase in IL-10. These findings are important in the context of autoimmune disease since they show that it is possible to reprogram disease-causing cells through GSK3 inhibition.
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Affiliation(s)
- Elaine V Hill
- School of Cellular and Molecular Medicine, University of BristolBristol, UK
| | - T H Sky Ng
- School of Cellular and Molecular Medicine, University of BristolBristol, UK
| | - Bronwen R Burton
- School of Cellular and Molecular Medicine, University of BristolBristol, UK
| | - Charly M Oakley
- School of Cellular and Molecular Medicine, University of BristolBristol, UK
| | - Karim Malik
- Cancer Epigenetics Lab, School of Cellular and Molecular Medicine, University of BristolBristol, UK
| | - David C Wraith
- School of Cellular and Molecular Medicine, University of BristolBristol, UK
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36
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Blevins LK, Wren JT, Holbrook BC, Hayward SL, Swords WE, Parks GD, Alexander-Miller MA. Coinfection with Streptococcus pneumoniae negatively modulates the size and composition of the ongoing influenza-specific CD8⁺ T cell response. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2014; 193:5076-87. [PMID: 25311807 PMCID: PMC4265766 DOI: 10.4049/jimmunol.1400529] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Infection with influenza A virus can lead to increased susceptibility to subsequent bacterial infection, often with Streptococcus pneumoniae. Given the substantial modification of the lung environment that occurs following pathogen infection, there is significant potential for modulation of immune responses. In this study, we show that infection of mice with influenza virus, followed by the noninvasive EF3030 strain of Streptococcus pneumoniae, leads to a significant decrease in the virus-specific CD8(+) T cell response in the lung. Adoptive-transfer studies suggest that this reduction contributes to disease in coinfected animals. The reduced number of lung effector cells in coinfected animals was associated with increased death, as well as a reduction in cytokine production in surviving cells. Further, cells that retained the ability to produce IFN-γ exhibited a decreased potential for coproduction of TNF-α. Reduced cytokine production was directly correlated with a decrease in the level of mRNA. Negative regulation of cells in the mediastinal lymph node was minimal compared with that present in the lung, supporting a model of selective regulation in the tissue harboring high pathogen burden. These results show that entry of a coinfecting pathogen can have profound immunoregulatory effects on an ongoing immune response. Together, these findings reveal a novel dynamic interplay between concurrently infecting pathogens and the adaptive immune system.
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Affiliation(s)
- Lance K Blevins
- Department of Microbiology and Immunology, Wake Forest University School of Medicine, Winston-Salem, NC 27101
| | - John T Wren
- Department of Microbiology and Immunology, Wake Forest University School of Medicine, Winston-Salem, NC 27101
| | - Beth C Holbrook
- Department of Microbiology and Immunology, Wake Forest University School of Medicine, Winston-Salem, NC 27101
| | - Sarah L Hayward
- Department of Microbiology and Immunology, Wake Forest University School of Medicine, Winston-Salem, NC 27101
| | - W Edward Swords
- Department of Microbiology and Immunology, Wake Forest University School of Medicine, Winston-Salem, NC 27101
| | - Griffith D Parks
- Department of Microbiology and Immunology, Wake Forest University School of Medicine, Winston-Salem, NC 27101
| | - Martha A Alexander-Miller
- Department of Microbiology and Immunology, Wake Forest University School of Medicine, Winston-Salem, NC 27101
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Blank U, Madera-Salcedo IK, Danelli L, Claver J, Tiwari N, Sánchez-Miranda E, Vázquez-Victorio G, Ramírez-Valadez KA, Macias-Silva M, González-Espinosa C. Vesicular trafficking and signaling for cytokine and chemokine secretion in mast cells. Front Immunol 2014; 5:453. [PMID: 25295038 PMCID: PMC4170139 DOI: 10.3389/fimmu.2014.00453] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 09/05/2014] [Indexed: 12/31/2022] Open
Abstract
Upon activation mast cells (MCs) secrete numerous inflammatory compounds stored in their cytoplasmic secretory granules by a process called anaphylactic degranulation, which is responsible for type I hypersensitivity responses. Prestored mediators include histamine and MC proteases but also some cytokines and growth factors making them available within minutes for a maximal biological effect. Degranulation is followed by the de novo synthesis of lipid mediators such as prostaglandins and leukotrienes as well as a vast array of cytokines, chemokines, and growth factors, which are responsible for late phase inflammatory responses. While lipid mediators diffuse freely out of the cell through lipid bilayers, both anaphylactic degranulation and secretion of cytokines, chemokines, and growth factors depends on highly regulated vesicular trafficking steps that occur along the secretory pathway starting with the translocation of proteins to the endoplasmic reticulum. Vesicular trafficking in MCs also intersects with endocytic routes, notably to form specialized cytoplasmic granules called secretory lysosomes. Some of the mediators like histamine reach granules via specific vesicular monoamine transporters directly from the cytoplasm. In this review, we try to summarize the available data on granule biogenesis and signaling events that coordinate the complex steps that lead to the release of the inflammatory mediators from the various vesicular carriers in MCs.
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Affiliation(s)
- Ulrich Blank
- INSERM UMRS 1149 , Paris , France ; CNRS ERL8252 , Paris , France ; Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX , Paris , France
| | - Iris Karina Madera-Salcedo
- INSERM UMRS 1149 , Paris , France ; CNRS ERL8252 , Paris , France ; Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX , Paris , France
| | - Luca Danelli
- INSERM UMRS 1149 , Paris , France ; CNRS ERL8252 , Paris , France ; Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX , Paris , France
| | - Julien Claver
- INSERM UMRS 1149 , Paris , France ; CNRS ERL8252 , Paris , France ; Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX , Paris , France
| | - Neeraj Tiwari
- INSERM UMRS 1149 , Paris , France ; CNRS ERL8252 , Paris , France ; Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX , Paris , France
| | | | - Genaro Vázquez-Victorio
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México , México City , México
| | | | - Marina Macias-Silva
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México , México City , México
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38
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de Vega WC, Vernon SD, McGowan PO. DNA methylation modifications associated with chronic fatigue syndrome. PLoS One 2014; 9:e104757. [PMID: 25111603 PMCID: PMC4128721 DOI: 10.1371/journal.pone.0104757] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Accepted: 07/14/2014] [Indexed: 01/30/2023] Open
Abstract
Chronic Fatigue Syndrome (CFS), also known as myalgic encephalomyelitis, is a complex multifactorial disease that is characterized by the persistent presence of fatigue and other particular symptoms for a minimum of 6 months. Symptoms fail to dissipate after sufficient rest and have major effects on the daily functioning of CFS sufferers. CFS is a multi-system disease with a heterogeneous patient population showing a wide variety of functional disabilities and its biological basis remains poorly understood. Stable alterations in gene function in the immune system have been reported in several studies of CFS. Epigenetic modifications have been implicated in long-term effects on gene function, however, to our knowledge, genome-wide epigenetic modifications associated with CFS have not been explored. We examined the DNA methylome in peripheral blood mononuclear cells isolated from CFS patients and healthy controls using the Illumina HumanMethylation450 BeadChip array, controlling for invariant probes and probes overlapping polymorphic sequences. Gene ontology (GO) and network analysis of differentially methylated genes was performed to determine potential biological pathways showing changes in DNA methylation in CFS. We found an increased abundance of differentially methylated genes related to the immune response, cellular metabolism, and kinase activity. Genes associated with immune cell regulation, the largest coordinated enrichment of differentially methylated pathways, showed hypomethylation within promoters and other gene regulatory elements in CFS. These data are consistent with evidence of multisystem dysregulation in CFS and implicate the involvement of DNA modifications in CFS pathology.
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Affiliation(s)
- Wilfred C. de Vega
- Centre for Environmental Epigenetics and Development, University of Toronto, Scarborough, ON, Canada
- Department of Biological Sciences, University of Toronto, Scarborough, ON, Canada
- Department of Cell and Systems Biology, University of Toronto, Toronto, ON, Canada
| | - Suzanne D. Vernon
- CFIDS Association of America, Charlotte, North Carolina, United States of America
| | - Patrick O. McGowan
- Centre for Environmental Epigenetics and Development, University of Toronto, Scarborough, ON, Canada
- Department of Biological Sciences, University of Toronto, Scarborough, ON, Canada
- Department of Cell and Systems Biology, University of Toronto, Toronto, ON, Canada
- * E-mail:
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O'Connor TG, Moynihan JA, Caserta MT. Annual research review: The neuroinflammation hypothesis for stress and psychopathology in children--developmental psychoneuroimmunology. J Child Psychol Psychiatry 2014; 55:615-31. [PMID: 24372371 PMCID: PMC4029900 DOI: 10.1111/jcpp.12187] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/06/2013] [Indexed: 12/14/2022]
Abstract
Experimental animal and adult human data suggest that stress exposure is associated with alterations in immune system function that may underlie increased susceptibility to disease and behavioral disorders. The implications of these data for child psychology and psychiatry are not yet clear. The current review seeks to distil and translate the relevant animal and adult human work to children to advance a developmental model of psychoneuroimmunology. In addition to reviewing key specific findings, we consider biological/conceptual models and technical aspects of psychoneuroimmunology work in pediatric populations, and outline the rationales and advantages of integrating hypotheses concerning neuroinflammation in developmental studies of psychopathology.
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40
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Paul F, Amit I. Plasticity in the transcriptional and epigenetic circuits regulating dendritic cell lineage specification and function. Curr Opin Immunol 2014; 30:1-8. [PMID: 24820527 DOI: 10.1016/j.coi.2014.04.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 04/09/2014] [Indexed: 12/23/2022]
Abstract
Dendritic cells (DC) are critical and functionally versatile innate immune sentinels. Here, we coarsely partition the adult DC lineage into three developmental subtypes and argue that pioneer transcription factors and chromatin remodeling are responsible for specification and plasticity between the DC subsets. Subsequently, intricate signaling-dependent transcription factor networks generate different functional states in response to pathogen stimuli within a specified DC subtype. To expand our understanding of lineage heterogeneity and functional activation states, we discuss the use of single cell genomics approaches in the context of a newly emerging systems immunology era, complementing the dichotomous definition of immune cells based solely on their surface marker expression. Rapid developments in single cell genomics are beginning to provide us with robust tools to potentially revise the working models of DC specification and the common hematopoietic tree.
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Affiliation(s)
- Franziska Paul
- Department of Immunology, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Ido Amit
- Department of Immunology, Weizmann Institute of Science, Rehovot 76100, Israel.
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Abstract
Th17 cells are a subset of CD4(+) effector T cells characterized by expression of the IL-17-family cytokines, IL-17A and IL-17F. Since their discovery nearly a decade ago, Th17 cells have been implicated in the regulation of dozens of immune-mediated inflammatory diseases and cancer. However, attempts to clarify the development and function of Th17 cells in human health and disease have generated as many questions as answers. On one hand, cytokine expression in Th17 cells appears to be remarkably dynamic and is subject to extensive regulation (both positive and negative) in tissue microenvironments. On the other hand, accumulating evidence suggests that the human Th17 subset is a heterogeneous population composed of several distinct pro- and anti-inflammatory subsets. Clearly, Th17 cells as originally conceived no longer neatly fit the long-standing paradigm of stable and irrepressible effector T cell function. Here we review current concepts surrounding human Th17 cells, with an emphasis on their plasticity, heterogeneity, and their many, tissue-specific functions. In spite of the challenges ahead, a comprehensive understanding of Th17 cells and their relationship to human disease is key to ongoing efforts to develop safer and more selective anti-inflammatory medicines.
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Dynamic nature of noncoding RNA regulation of adaptive immune response. Int J Mol Sci 2013; 14:17347-77. [PMID: 23975170 PMCID: PMC3794731 DOI: 10.3390/ijms140917347] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 07/30/2013] [Accepted: 08/12/2013] [Indexed: 02/06/2023] Open
Abstract
Immune response plays a fundamental role in protecting the organism from infections; however, dysregulation often occurs and can be detrimental for the organism, leading to a variety of immune-mediated diseases. Recently our understanding of the molecular and cellular networks regulating the immune response, and, in particular, adaptive immunity, has improved dramatically. For many years, much of the focus has been on the study of protein regulators; nevertheless, recent evidence points to a fundamental role for specific classes of noncoding RNAs (ncRNAs) in regulating development, activation and homeostasis of the immune system. Although microRNAs (miRNAs) are the most comprehensive and well-studied, a number of reports suggest the exciting possibility that long ncRNAs (lncRNAs) could mediate host response and immune function. Finally, evidence is also accumulating that suggests a role for miRNAs and other small ncRNAs in autocrine, paracrine and exocrine signaling events, thus highlighting an elaborate network of regulatory interactions mediated by different classes of ncRNAs during immune response. This review will explore the multifaceted roles of ncRNAs in the adaptive immune response. In particular, we will focus on the well-established role of miRNAs and on the emerging role of lncRNAs and circulating ncRNAs, which all make indispensable contributions to the understanding of the multilayered modulation of the adaptive immune response.
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