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Basu M, Bhatt R, Sharma A, Boopathi R, Das S, Kundu TK. The Largest Subunit of Human TFIIIC Complex, TFIIIC220, a Lysine Acetyltransferase Targets Histone H3K18. J Biochem 2024; 175:205-213. [PMID: 37963603 DOI: 10.1093/jb/mvad088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 10/23/2023] [Accepted: 10/21/2023] [Indexed: 11/16/2023] Open
Abstract
TFIIIC is a multi-subunit complex required for tRNA transcription by RNA polymerase III. Human TFIIIC holo-complex possesses lysine acetyltransferase activity that aids in relieving chromatin-mediated repression for RNA polymerase III-mediated transcription and chromatin assembly. Here we have characterized the acetyltransferase activity of the largest and DNA-binding subunit of TFIIIC complex, TFIIIC220. Purified recombinant human TFIIIC220 acetylated core histones H3, H4 and H2A in vitro. Moreover, we have identified the putative catalytic domain of TFIIIC220 that efficiently acetylates core histones in vitro. Mutating critical residues of the putative acetyl-CoA binding 'P loop' drastically reduced the catalytic activity of the acetyltransferase domain. Further analysis showed that the knockdown of TFIIIC220 in mammalian cell lines dramatically reduces global H3K18 acetylation level, which was rescued by overexpression of the putative acetyltransferase domain of human TFIIIC220. Our findings indicated a possibility of a crucial role for TFIIIC220 in maintaining acetylation homeostasis in the cell.
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Affiliation(s)
- Moumita Basu
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore- 560064, India
| | - Rohini Bhatt
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore- 560064, India
| | - Anjali Sharma
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore- 560064, India
| | - Ramachandran Boopathi
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore- 560064, India
| | - Sadhan Das
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore- 560064, India
| | - Tapas K Kundu
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore- 560064, India
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2
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Yang C, Li Y, Hu Y, Li Q, Lan Y, Li Y. Per-cell histone acetylation is associated with terminal differentiation in human T cells. Clin Epigenetics 2024; 16:21. [PMID: 38321550 PMCID: PMC10845582 DOI: 10.1186/s13148-024-01634-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 01/24/2024] [Indexed: 02/08/2024] Open
Abstract
BACKGROUND Epigenetic remodeling at effector gene loci has been reported to be critical in regulating T cell differentiation and function. However, efforts to investigate underlying epigenetic mechanisms that control T cell behaviors have been largely hindered by very limited experimental tools, especially in humans. RESULTS In this study, we employed a flow cytometric assay to analyze histone acetylation at single-cell level in human T cells. The data showed that histone acetylation was increased during T cell activation. Among T cell subsets, terminally differentiated effector memory T (TEMRA) cells robustly producing effector cytokines were hyper-acetylated. Conversely, these TEMRA cells had lower expression levels of TCF-1, a key transcription factor for maintaining stem cell features. Pharmaceutical inhibition of histone acetylation using a small molecule C646 restrained the production of effector molecules, but retained stem cell-like properties in T cells after expansion. CONCLUSIONS Per-cell histone acetylation is associated with terminal differentiation and poor stemness in human T cells. These observations suggest a new approach to enhance the stem cell-like properties of T cells and improve the efficacy of immunotherapy.
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Affiliation(s)
- Cheng Yang
- Department of Infectious Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - You Li
- Department of Infectious Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Yaqiu Hu
- Department of Infectious Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Qian Li
- Department of Infectious Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Yinghua Lan
- Department of Infectious Diseases, Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400010, China.
| | - Yongguo Li
- Department of Infectious Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China.
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3
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Zhuo C, Ruan Q, Zhao X, Shen Y, Lin R. CXCL1 promotes colon cancer progression through activation of NF-κB/P300 signaling pathway. Biol Direct 2022; 17:34. [PMID: 36434686 PMCID: PMC9701058 DOI: 10.1186/s13062-022-00348-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 11/17/2022] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND The upregulated expression of CXCL1 has been validated in colorectal cancer patients. As a potential biotherapeutic target for colorectal cancer, the mechanism by which CXCL1 affects the development of colorectal cancer is not clear. METHODS Expression data of CXCL1 in colorectal cancer were obtained from the GEO database and verified using the GEPIA database and the TIMER 2.0 database. Knockout and overexpression of CXCL1 in colorectal cancer cells by CRISPR/Cas and "Sleeping Beauty" transposon-mediated gene editing techniques. Cell biological function was demonstrated by CCK-8, transwell chamber and Colony formation assay. RT-qPCR and Western Blot assays measured RNA and protein expression. Protein localization and expression were measured by immunohistochemistry and immunofluorescence. RESULTS Bioinformatics analysis showed significant overexpression of CXCL1 in the colorectal cancer tissues compared to normal human tissues, and identified CXCL1 as a potential therapeutic target for colorectal cancer. We demonstrate that CXCL1 promotes the proliferation and migration of colon cancer cells and has a facilitative effect on tumor angiogenesis. Furthermore, CXCL1 elevation promoted the migration of M2-tumor associated macrophages (TAMs) while disrupting the aggregation of CD4+ and CD8+ T cells at tumor sites. Mechanistic studies suggested that CXCL1 activates the NF-κB pathway. In the in vivo colon cancer transplantation tumor model, treatment with the P300 inhibitor C646 significantly inhibited the growth of CXCL1-overexpressing colon cancer. CONCLUSION CXCL1 promotes colon cancer development through activation of NF-κB/P300, and that CXCL1-based therapy is a potential novel strategy to prevent colon cancer development.
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Affiliation(s)
- Changhua Zhuo
- grid.415110.00000 0004 0605 1140Department of Gastrointestinal Surgical Oncology, Clinical Oncology School of Fujian Medical University, Fujian Cancer Hospital, Fuzhou, Fujian 350014 People’s Republic of China ,grid.411604.60000 0001 0130 6528Fuzhou University, College of Chemistry, Fuzhou, 350108 People’s Republic of China ,Fujian Key Laboratory of Translational Cancer Medicine and Fujian Provincial Key Laboratory of Tumor Biotherapy, Fuzhou, Fujian 350014 People’s Republic of China
| | - Qiang Ruan
- grid.411604.60000 0001 0130 6528Fuzhou University, College of Chemistry, Fuzhou, 350108 People’s Republic of China
| | - Xiangqian Zhao
- grid.411503.20000 0000 9271 2478Fujian Normal University Qishan Campus, College of Life Science, Biomedical Research Center of South China, Fuzhou, 350117 People’s Republic of China
| | - Yangkun Shen
- grid.411503.20000 0000 9271 2478Fujian Normal University Qishan Campus, College of Life Science, Biomedical Research Center of South China, Fuzhou, 350117 People’s Republic of China
| | - Ruirong Lin
- grid.415110.00000 0004 0605 1140Department of Gastrointestinal Surgical Oncology, Clinical Oncology School of Fujian Medical University, Fujian Cancer Hospital, Fuzhou, Fujian 350014 People’s Republic of China ,grid.411604.60000 0001 0130 6528Fuzhou University, College of Chemistry, Fuzhou, 350108 People’s Republic of China ,Fujian Key Laboratory of Translational Cancer Medicine and Fujian Provincial Key Laboratory of Tumor Biotherapy, Fuzhou, Fujian 350014 People’s Republic of China
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Liu YC, Lin YH, Chi HC, Huang PS, Liao CJ, Liou YS, Lin CC, Yu CJ, Yeh CT, Huang YH, Lin KH. CRNDE acts as an epigenetic modulator of the p300/YY1 complex to promote HCC progression and therapeutic resistance. Clin Epigenetics 2022; 14:106. [PMID: 35999564 PMCID: PMC9400329 DOI: 10.1186/s13148-022-01326-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 08/09/2022] [Indexed: 11/10/2022] Open
Abstract
Background Hepatocellular carcinoma (HCC) is one of the most common primary liver malignancies worldwide. The long-term prognosis for HCC remains extremely poor, with drug resistance being the major underlying cause of recurrence and mortality. The lncRNA colorectal neoplasia differentially expressed (CRNDE) is an epigenetic mediator and plays an important role to drive proliferation and drug resistance in HCC. However, CRNDE as an epigenetic regulator with influences sorafenib resistance in HCC is unclear. Thus, we explore the potential of targeting the CRNDE/p300/YY1 axis as a novel therapeutic strategy to overcome sorafenib resistance of HCC. Method Detection of the expression level of CRNDE and EGFR in clinical specimens of HCC. CRNDE, EGFR, p300, and YY1expression were altered in HCC cells through transfection with different plasmids, and cell proliferation, migration, invasion, and sorafenib resistance were subsequently observed. Immunoprecipitation, chromatin immunoprecipitation, re-chromatin immunoprecipitation, site-directed mutagenesis, RNA Immunoprecipitation, immune fluorescence, qRT-PCR, and western blotting were performed to uncover the mechanisms of CRNDE regulation. The xenograft nude mice model was used to investigate the tumor growth and sorafenib resistance. Results In this study, we showed that CRNDE expression is significantly positively correlated with that of epidermal growth factor receptor (EGFR) in clinical specimens of HCC and induces proliferation and sorafenib resistance of HCC via EGFR-mediated signaling. Mechanistically, CRNDE stabilized the p300/YY1 complex at the EGFR promoter and simultaneously enhanced histone H3K9 and H3K27 acetylation, which serve as markers of relaxed chromatin. EGFR was positively upregulated by the epigenetic complex, p300/YY1, in a manner dependent on CRNDE expression, leading to enhanced tumor cell proliferation and sorafenib resistance. Furthermore, C646, a p300 inhibitor, suppressed EGFR transcriptional activity by decreasing chromatin relaxation and YY1 binding, which effectively reduced proliferation/sorafenib resistance and prolonged overall survival. Conclusion Our collective findings support the potential of targeting the CRNDE/p300/YY1 axis as a novel therapeutic strategy to overcome sorafenib resistance of HCC. Supplementary Information The online version contains supplementary material available at 10.1186/s13148-022-01326-3.
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Affiliation(s)
- Yu-Chin Liu
- Department of Biochemistry, College of Medicine, Chang-Gung University, Taoyuan, Taiwan.,Graduate Institute of Biomedical Sciences, College of Medicine, Chang-Gung University, 259 Wen-Hwa 1 Road, Taoyuan, Taiwan, Republic of China.,Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan
| | - Yang-Hsiang Lin
- Liver Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
| | - Hsiang-Cheng Chi
- Graduate Institute of Integrated Medicine, China Medical University, Taichung, Taiwan
| | - Po-Shuan Huang
- Department of Biochemistry, College of Medicine, Chang-Gung University, Taoyuan, Taiwan.,Graduate Institute of Biomedical Sciences, College of Medicine, Chang-Gung University, 259 Wen-Hwa 1 Road, Taoyuan, Taiwan, Republic of China
| | - Chia-Jung Liao
- Department of Biochemistry, College of Medicine, Chang-Gung University, Taoyuan, Taiwan.,Graduate Institute of Biomedical Sciences, College of Medicine, Chang-Gung University, 259 Wen-Hwa 1 Road, Taoyuan, Taiwan, Republic of China
| | - Yu-Syuan Liou
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang-Gung University, 259 Wen-Hwa 1 Road, Taoyuan, Taiwan, Republic of China
| | - Chiao-Chun Lin
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang-Gung University, 259 Wen-Hwa 1 Road, Taoyuan, Taiwan, Republic of China
| | - Chia-Jung Yu
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang-Gung University, 259 Wen-Hwa 1 Road, Taoyuan, Taiwan, Republic of China.,Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan.,Department of Cell and Molecular Biology, College of Medicine, Chang Gung University, Taoyuan, Taiwan.,Department of Thoracic Medicine, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
| | - Chau-Ting Yeh
- Liver Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
| | - Ya-Hui Huang
- Liver Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
| | - Kwang-Huei Lin
- Department of Biochemistry, College of Medicine, Chang-Gung University, Taoyuan, Taiwan. .,Graduate Institute of Biomedical Sciences, College of Medicine, Chang-Gung University, 259 Wen-Hwa 1 Road, Taoyuan, Taiwan, Republic of China. .,Liver Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan. .,Research Center for Chinese Herbal Medicine, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan, Taiwan.
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5
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Xu X, Li J, Long X, Tao S, Yu X, Ruan X, Zhao K, Tian L. C646 Protects Against DSS-Induced Colitis Model by Targeting NLRP3 Inflammasome. Front Pharmacol 2021; 12:707610. [PMID: 34322027 PMCID: PMC8313226 DOI: 10.3389/fphar.2021.707610] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 06/18/2021] [Indexed: 12/22/2022] Open
Abstract
Numerous pieces of evidence have identified that the NLRP3 inflammasome plays a pivotal role in the development and pathogenesis of colitis. Targeting the NLRP3 inflammasome represents a potential therapeutic treatment. Our previous studies have suggested that acetylation of NLRP3 is indispensable to NLRP3 inflammasome activation, and some acetyltransferase inhibitors could suppress the NLRP3 inflammasome activation. Here, we identified that C646, an inhibitor of histone acetyltransferase p300, exerts anti-inflammatory effects in DSS-induced colitis mice by targeting the NLRP3 inflammasome. Mechanistically, C646 not only inhibits NF-κB activation, leading to the decreased expression of pro-inflammatory cytokines (IL-1β, IL-6, and TNF-α) and NLRP3, but also suppresses the NLRP3 inflammasome assembly by disrupting the interaction between NLRP3 and ASC. In addition, C646 attenuated the LPS-induced acute systemic inflammation model. Thus, our results demonstrate the ability of C646 to suppress the NLRP3 inflammasome activity and its potential application in the treatment of inflammatory bowel disease.
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Affiliation(s)
- Xueming Xu
- Department of Hematology and Key Laboratory of Non-Resolving Inflammation and Cancer of Hunan Province, the Third Xiangya Hospital, Central South University, Changsha, China
| | - Jing Li
- Department of Hematology and Key Laboratory of Non-Resolving Inflammation and Cancer of Hunan Province, the Third Xiangya Hospital, Central South University, Changsha, China
| | - Xiuyan Long
- Department of Gastroenterology, the Third Xiangya Hospital, Central South University, Changsha, China
| | - Sifan Tao
- Department of Gastroenterology, the Third Xiangya Hospital, Central South University, Changsha, China
| | - Xiaoyu Yu
- Department of Gastroenterology, the Third Xiangya Hospital, Central South University, Changsha, China
| | - Xixian Ruan
- Department of Gastroenterology, the Third Xiangya Hospital, Central South University, Changsha, China
| | - Kai Zhao
- Department of Hematology and Key Laboratory of Non-Resolving Inflammation and Cancer of Hunan Province, the Third Xiangya Hospital, Central South University, Changsha, China
| | - Li Tian
- Department of Gastroenterology, the Third Xiangya Hospital, Central South University, Changsha, China
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6
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Abstract
Background Coronary microvascular dysfunction is common in patients of myocardial infarction with non‐obstructive coronary artery disease. Coronary flow reserve (CFR) reflects coronary microvascular function and is a powerful independent index of coronary microvascular dysfunction and heart failure. Our previous studies showed that knockout of SIRT3 (Sirtuin 3) decreased CFR and caused a diastolic dysfunction. Few studies focus on the treatment of impaired CFR and heart failure. In the present study, we explored the role of C646, a histone acetyltransferase p300 inhibitor, in regulating CFR and cardiac remodeling in SIRT3 knockout (SIRT3KO) mice. Methods and Results After treating with C646 for 14 days, CFR, pulse‐wave velocity, and cardiac function were measured in SIRT3KO mice. SIRT3KO mice treated with C646 showed a significant improvement of CFR, pulse‐wave velocity, ejection fraction, and fractional shortening. Treatment with C646 reversed pre‐existing cardiac fibrosis, hypertrophy, and capillary rarefaction in SIRT3KO mice. Mechanistically, knockout of Sirtuin 3 resulted in significant increases in p300 expression and H3K56 acetylation. Treatment with C646 significantly reduced levels of p300 and H3K56 acetylation in SIRT3KO mice. Furthermore, treatment with C646 increased endothelial nitric oxide synthase expression and reduced arginase II expression and activity. The expression of NF‐κB (nuclear factor kappa‐light‐chain‐enhancer of activated B cells) and VCAM‐1 (vascular cell adhesion molecule 1) was also significantly suppressed by C646 treatment in SIRT3KO mice. Conclusions C646 treatment attenuated p300 and H3K56 acetylation and improved arterial stiffness and CFR via improvement of endothelial cell (EC) dysfunction and suppression of NF‐κB.
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Affiliation(s)
- Han Su
- Department of Pharmacology and Toxicology University of Mississippi Medical Center Jackson MS.,Department of General Surgery Third Xiangya Hospital Central South University Changsha China
| | - Heng Zeng
- Department of Pharmacology and Toxicology University of Mississippi Medical Center Jackson MS
| | - Xiaochen He
- Department of Pharmacology and Toxicology University of Mississippi Medical Center Jackson MS
| | - Shai-Hong Zhu
- Department of General Surgery Third Xiangya Hospital Central South University Changsha China
| | - Jian-Xiong Chen
- Department of Pharmacology and Toxicology University of Mississippi Medical Center Jackson MS
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Chen G, Liu A, Xu Y, Gao L, Jiang M, Li Y, Lv N, Zhou L, Wang L, Yu L, Li Y. The RUNX1-ETO fusion protein trans-activates c-KIT expression by recruiting histone acetyltransferase P300 on its promoter. FEBS J 2019; 286:901-912. [PMID: 30637949 DOI: 10.1111/febs.14751] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 12/02/2018] [Accepted: 01/11/2019] [Indexed: 01/21/2023]
Abstract
The oncoprotein RUNX1-ETO is the fusion product of t(8;21)(q22;q22) and constitutes one of the most common genetic alterations in acute myeloid leukemia (AML). Abnormal c-KIT overexpression is considered an independent negative prognostic factor for relapse and survival in t(8;21) AML patients. However, the molecular mechanism of high c-KIT expression in t(8;21) AML remains unknown. In this study, we detected RUNX1-ETO and c-KIT gene expression in AML-M2 patients and verified the overexpression of c-KIT in t(8;21) AML patients. We also found that c-KIT overexpression was a poor prognostic indicator in RUNX1-ETO positive AML patients, but not in RUNX1-ETO negative AML patients. We used the dual-luciferase and ChIP assays to demonstrate that the RUNX1-ETO protein epigenetically trans-activates c-KIT by binding to the c-KIT promoter and recruiting the histone acetyltransferase P300 to the c-KIT promoter, elucidating the mechanism of the abnormally increased c-KIT expression in t(8;21) AML patients. Moreover, pharmacological studies revealed that C646, a P300 inhibitor, could inhibit proliferation, induce apoptosis and arrest the cell cycle more effectively in RUNX1-ETO positive cells than in negative ones. The levels of c-KIT and RUNX1-ETO proteins were also decreased with C646 treatment in RUNX1-ETO positive cells. These findings suggested that P300 could be a therapeutic target and that C646 could be used as a potential treatment for RUNX1-ETO positive AML patients. Interestingly, using the dual-luciferase assay, we also found that the binding capacity of RUNX1-ETO9a, a truncated RUNX1-ETO isoform, to the c-KIT promoter was stronger than that of RUNX1-ETO, suggesting RUNX1-ETO9a as another valuable therapeutic target in t(8;21) AML.
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Affiliation(s)
- Guofeng Chen
- School of Medicine, Nankai University, Tianjin, China
| | - Anqi Liu
- Department of Intensive Care Unit, Beijing Electric Power Hospital, National Electric Net Ltd., Beijing, China
| | - Yihan Xu
- Department of Hematology, Chinese PLA General Hospital, Beijing, China
| | - Li Gao
- Department of Hematology, China-Japan Friendship Hospital, Beijing, China
| | - Mengmeng Jiang
- Department of Hematology, Chinese PLA General Hospital, Beijing, China
| | - Yan Li
- Department of Hematology, Chinese PLA General Hospital, Beijing, China.,Department of Hematology, Hainan Branch of Chinese PLA General Hospital, Sanya, China
| | - Na Lv
- Department of Hematology, Chinese PLA General Hospital, Beijing, China.,Department of Hematology-Oncology, International Cancer Center, Shenzhen University General Hospital, Shenzhen University Health Science Center, China
| | - Lei Zhou
- Department of Hematology, Chinese PLA General Hospital, Beijing, China.,Department of Hematology, No. 202 Hospital of PLA, Shenyang, China
| | - Lili Wang
- Department of Hematology, Chinese PLA General Hospital, Beijing, China
| | - Li Yu
- School of Medicine, Nankai University, Tianjin, China.,Department of Hematology, Chinese PLA General Hospital, Beijing, China.,Department of Hematology-Oncology, International Cancer Center, Shenzhen University General Hospital, Shenzhen University Health Science Center, China
| | - Yonghui Li
- Department of Hematology, Chinese PLA General Hospital, Beijing, China.,Institute of Nephrology, State Key Laboratory of Kidney Diseases, Beijing Key Laboratory of Kidney Disease, Chinese PLA General Hospital, Beijing, China
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Bai B, Zhang Q, Wan C, Li D, Zhang T, Li H. CBP/p300 inhibitor C646 prevents high glucose exposure induced neuroepithelial cell proliferation. Birth Defects Res 2018; 110:1118-1128. [PMID: 30114346 DOI: 10.1002/bdr2.1360] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 04/17/2018] [Accepted: 05/07/2018] [Indexed: 12/13/2022]
Abstract
BACKGROUND Maternal diabetes related neural tube defects (NTDs) are a result of oxidative stress and apoptosis. However, the molecular mechanism behind the pathogenesis is not fully understood. Here, we report that high glucose exposure-induced epigenetic changes influence histone H4 acetylation and neuroepithelial cell proliferation. We also show that the acetyltransferase inhibitor C646 can prevent high glucose induced changes in histone H4 acetylation and neuroepithelial cell proliferation. METHODS By using LC-MS/MS as an unbiased approach, we screened the histone acetylation profile in an E9 neuroepithelial cell line (NE-4C) under high glucose exposure. We further explored the mechanism in cells in vitro and in maternal diabetes-induced mouse embryos in vivo. RESULTS We identified 35 core histone acetylation marks in normal E9 neuroepithelial cells, whereas high glucose exposure resulted in novel acetylation sites on H4K31 and H4K44. Acetylation levels of embryonic development associated H4K5/K8/K12/K16 increased in neuroepithelial cells exposed to high glucose in vitro and in brain tissue from maternal diabetes induced exencephalic embryos in vivo. Further, mRNA level of histone acetyltransferase CBP encoded gene Crebbp was significantly increased both in vitro and in vivo. The addition of C646, a selective inhibitor for CBP/p300, significantly rescued increase of H4K5/K8/K12/K16 acetylation levels and H3S10pi-labeled neuroepithelial cell proliferation induced by high glucose exposure. CONCLUSION Our data provide complementary insights for potential mechanisms of maternal diabetes induced NTDs.
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Affiliation(s)
- Baoling Bai
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, 100020, China
| | - Qin Zhang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, 100020, China
| | - Chunlei Wan
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, 100020, China
| | - Dan Li
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, 100020, China
| | - Ting Zhang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, 100020, China
| | - Huili Li
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, 100020, China
- Department of Pediatrics, University of Colorado Anschutz Medical Campus, Children's Hospital Colorado, Aurora, Colorado, 80045
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9
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Mitchnick KA, Creighton SD, Cloke JM, Wolter M, Zaika O, Christen B, Van Tiggelen M, Kalisch BE, Winters BD. Dissociable roles for histone acetyltransferases p300 and PCAF in hippocampus and perirhinal cortex-mediated object memory. Genes Brain Behav 2017; 15:542-57. [PMID: 27251651 DOI: 10.1111/gbb.12303] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 05/27/2016] [Accepted: 05/29/2016] [Indexed: 10/21/2022]
Abstract
The importance of histone acetylation for certain types of memory is now well established. However, the specific contributions of the various histone acetyltransferases to distinct memory functions remain to be determined; therefore, we employed selective histone acetyltransferase protein inhibitors and short-interference RNAs to evaluate the roles of CREB-binding protein (CBP), E1A-binding protein (p300) and p300/CBP-associated factor (PCAF) in hippocampus and perirhinal cortex (PRh)-mediated object memory. Rats were tested for short- (STM) and long-term memory (LTM) in the object-in-place task, which relies on the hippocampus and PRh for spatial memory and object identity processing, respectively. Selective inhibition of these histone acetyltransferases by small-interfering RNA and pharmacological inhibitors targeting the HAT domain produced dissociable effects. In the hippocampus, CBP or p300 inhibition impaired long-term but not short-term object memory, while inhibition of PCAF impaired memory at both delays. In PRh, HAT inhibition did not impair STM, and only CBP and PCAF inhibition disrupted LTM; p300 inhibition had no effects. Messenger RNA analyses revealed findings consistent with the pattern of behavioral effects, as all three enzymes were upregulated in the hippocampus (dentate gyrus) following learning, whereas only CBP and PCAF were upregulated in PRh. These results demonstrate, for the first time, the necessity of histone acetyltransferase activity for PRh-mediated object memory and indicate that the specific mnemonic roles of distinctive histone acetyltransferases can be dissociated according to specific brain regions and memory timeframe.
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Affiliation(s)
- K A Mitchnick
- Department of Psychology, University of Guelph, Guelph, ON, Canada.,Collaborative Neuroscience Program, University of Guelph, Guelph, ON, Canada
| | - S D Creighton
- Department of Psychology, University of Guelph, Guelph, ON, Canada.,Collaborative Neuroscience Program, University of Guelph, Guelph, ON, Canada
| | - J M Cloke
- Department of Psychology, University of Guelph, Guelph, ON, Canada.,Collaborative Neuroscience Program, University of Guelph, Guelph, ON, Canada
| | - M Wolter
- Department of Psychology, University of Guelph, Guelph, ON, Canada
| | - O Zaika
- Department of Biomedical Sciences, University of Guelph, Guelph, ON, Canada
| | - B Christen
- Department of Psychology, University of Guelph, Guelph, ON, Canada
| | - M Van Tiggelen
- Department of Biomedical Sciences, University of Guelph, Guelph, ON, Canada
| | - B E Kalisch
- Collaborative Neuroscience Program, University of Guelph, Guelph, ON, Canada.,Department of Biomedical Sciences, University of Guelph, Guelph, ON, Canada
| | - B D Winters
- Department of Psychology, University of Guelph, Guelph, ON, Canada.,Collaborative Neuroscience Program, University of Guelph, Guelph, ON, Canada
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Warner DR, Smith SC, Smolenkova IA, Pisano MM, Greene RM. Inhibition of p300 histone acetyltransferase activity in palate mesenchyme cells attenuates Wnt signaling via aberrant E-cadherin expression. Exp Cell Res 2016; 342:32-8. [PMID: 26921506 DOI: 10.1016/j.yexcr.2016.02.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 01/27/2016] [Accepted: 02/23/2016] [Indexed: 10/22/2022]
Abstract
p300 is a multifunctional transcriptional coactivator that interacts with numerous transcription factors and exhibits protein/histone acetyltransferase activity. Loss of p300 function in humans and in mice leads to craniofacial defects. In this study, we demonstrated that inhibition of p300 histone acetyltransferase activity with the compound, C646, altered the expression of several genes, including Cdh1 (E-cadherin) in mouse maxillary mesenchyme cells, which are the cells that give rise to the secondary palate. The increased expression of plasma membrane-bound E-cadherin was associated with reduced cytosolic β-catenin, that led to attenuated signaling through the canonical Wnt pathway. Furthermore, C646 reduced both cell proliferation and the migratory ability of these cells. These results suggest that p300 histone acetyltransferase activity is critical for Wnt-dependent palate mesenchymal cell proliferation and migration, both processes that play a significant role in morphogenesis of the palate.
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Affiliation(s)
- Dennis R Warner
- University of Louisville Birth Defects Center, School of Dentistry, 501 South Preston Street, Louisville, KY 40202, United States
| | - Scott C Smith
- University of Louisville Birth Defects Center, School of Dentistry, 501 South Preston Street, Louisville, KY 40202, United States
| | - Irina A Smolenkova
- University of Louisville Birth Defects Center, School of Dentistry, 501 South Preston Street, Louisville, KY 40202, United States
| | - M Michele Pisano
- University of Louisville Birth Defects Center, School of Dentistry, 501 South Preston Street, Louisville, KY 40202, United States.
| | - Robert M Greene
- University of Louisville Birth Defects Center, School of Dentistry, 501 South Preston Street, Louisville, KY 40202, United States
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van den Bosch T, Boichenko A, Leus NGJ, Ourailidou ME, Wapenaar H, Rotili D, Mai A, Imhof A, Bischoff R, Haisma HJ, Dekker FJ. The histone acetyltransferase p300 inhibitor C646 reduces pro-inflammatory gene expression and inhibits histone deacetylases. Biochem Pharmacol 2015; 102:130-140. [PMID: 26718586 DOI: 10.1016/j.bcp.2015.12.010] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Accepted: 12/14/2015] [Indexed: 12/26/2022]
Abstract
Lysine acetylations are reversible posttranslational modifications of histone and non-histone proteins that play important regulatory roles in signal transduction cascades and gene expression. Lysine acetylations are regulated by histone acetyltransferases as writers and histone deacetylases as erasers. Because of their role in signal transduction cascades, these enzymes are important players in inflammation. Therefore, histone acetyltransferase inhibitors could reduce inflammatory responses. Among the few histone acetyltransferase inhibitors described, C646 is one of the most potent (Ki of 0.4μM for histone acetyltransferase p300). C646 was described to affect the NF-κB pathway; an important pathway in inflammatory responses, which is regulated by acetylation. This pathway has been implicated in asthma and COPD. Therefore, we hypothesized that via regulation of the NF-κB signaling pathway, C646 can inhibit pro-inflammatory gene expression, and have potential for the treatment of inflammatory lung diseases. In line with this, we demonstrate here that C646 reduces pro-inflammatory gene expression in RAW264.7 murine macrophages and murine precision-cut lung slices. To unravel its effects on cellular substrates we applied mass spectrometry and found, counterintuitively, a slight increase in acetylation of histone H3. Based on this finding, and structural features of C646, we presumed inhibitory activity of C646 on histone deacetylases, and indeed found inhibition of histone deacetylases from 7μM and higher concentrations. This indicates that C646 has potential for further development towards applications in the treatment of inflammation, however, its newly discovered lack of selectivity at higher concentrations needs to be taken into account.
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Affiliation(s)
- Thea van den Bosch
- Pharmaceutical Gene Modulation, Groningen Research Institute of Pharmacy, University of Groningen, The Netherlands
| | - Alexander Boichenko
- Analytical Biochemistry, Groningen Research Institute of Pharmacy, University of Groningen, The Netherlands
| | - Niek G J Leus
- Pharmaceutical Gene Modulation, Groningen Research Institute of Pharmacy, University of Groningen, The Netherlands
| | - Maria E Ourailidou
- Pharmaceutical Gene Modulation, Groningen Research Institute of Pharmacy, University of Groningen, The Netherlands
| | - Hannah Wapenaar
- Pharmaceutical Gene Modulation, Groningen Research Institute of Pharmacy, University of Groningen, The Netherlands
| | - Dante Rotili
- Department of Chemistry and Technologies of Drugs, Sapienza University of Rome, Italy
| | - Antonello Mai
- Department of Chemistry and Technologies of Drugs, Sapienza University of Rome, Italy; Pasteur Institute, Cenci Bolognetti Foundation, Sapienza University of Rome, Italy
| | - Axel Imhof
- Protein Analysis Unit Biomedical Center and Center for Integrated Protein Science Munich, Ludwig-Maximilians University, Planegg-Martinsried, Germany
| | - Rainer Bischoff
- Analytical Biochemistry, Groningen Research Institute of Pharmacy, University of Groningen, The Netherlands
| | - Hidde J Haisma
- Pharmaceutical Gene Modulation, Groningen Research Institute of Pharmacy, University of Groningen, The Netherlands
| | - Frank J Dekker
- Pharmaceutical Gene Modulation, Groningen Research Institute of Pharmacy, University of Groningen, The Netherlands.
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Gaddis M, Gerrard D, Frietze S, Farnham PJ. Altering cancer transcriptomes using epigenomic inhibitors. Epigenetics Chromatin 2015; 8:9. [PMID: 26191083 PMCID: PMC4506402 DOI: 10.1186/1756-8935-8-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Revised: 11/27/2014] [Accepted: 01/08/2015] [Indexed: 12/31/2022] Open
Abstract
Background Due to the hyper-activation of WNT signaling in a variety of cancer types, there has been a strong drive to develop pathway-specific inhibitors with the eventual goal of providing a chemotherapeutic antagonist of WNT signaling to cancer patients. A new category of drugs, called epigenetic inhibitors, are being developed that hold high promise for inhibition of the WNT pathway. The canonical WNT signaling pathway initiates when WNT ligands bind to receptors, causing the nuclear localization of the co-activator β-catenin (CTNNB1), which leads to an association of β-catenin with a member of the TCF transcription factor family at regulatory regions of WNT-responsive genes. The TCF/β-catenin complex then recruits CBP (CREBBP) or p300 (EP300), leading to histone acetylation and gene activation. A current model in the field is that CBP-driven expression of WNT target genes supports proliferation whereas p300-driven expression of WNT target genes supports differentiation. The small molecule inhibitor ICG-001 binds to CBP, but not to p300, and competitively inhibits the interaction of CBP with β-catenin. Upon treatment of cancer cells, this should reduce expression of CBP-regulated transcription, leading to reduced tumorigenicity and enhanced differentiation. Results We have compared the genome-wide effects on the transcriptome after treatment with ICG-001 (the specific CBP inhibitor) versus C646, a compound that competes with acetyl-coA for the Lys-coA binding pocket of both CBP and p300. We found that both drugs cause large-scale changes in the transcriptome of HCT116 colon cancer cells and PANC1 pancreatic cancer cells and reverse some tumor-specific changes in gene expression. Interestingly, although the epigenetic inhibitors affect cell cycle pathways in both the colon and pancreatic cancer cell lines, the WNT signaling pathway was affected only in the colon cancer cells. Notably, WNT target genes were similarly downregulated after treatment of HCT116 with C646 as with ICG-001. Conclusion Our results suggest that treatment with a general HAT inhibitor causes similar effects on the transcriptome as does treatment with a CBP-specific inhibitor and that epigenetic inhibition affects the WNT pathway in HCT116 cells and the cholesterol biosynthesis pathway in PANC1 cells. Electronic supplementary material The online version of this article (doi:10.1186/1756-8935-8-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Malaina Gaddis
- USC/Norris Comprehensive Cancer Center, University of Southern California, 1450 Biggy Street, NRT 6503, Los Angeles, CA 90089-9601 USA
| | - Diana Gerrard
- School of Biological Sciences, University of Northern Colorado, Greeley, CO 80639 USA
| | - Seth Frietze
- School of Biological Sciences, University of Northern Colorado, Greeley, CO 80639 USA
| | - Peggy J Farnham
- USC/Norris Comprehensive Cancer Center, University of Southern California, 1450 Biggy Street, NRT 6503, Los Angeles, CA 90089-9601 USA
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