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Kumar KK, Aburawi EH, Ljubisavljevic M, Leow MKS, Feng X, Ansari SA, Emerald BS. Exploring histone deacetylases in type 2 diabetes mellitus: pathophysiological insights and therapeutic avenues. Clin Epigenetics 2024; 16:78. [PMID: 38862980 PMCID: PMC11167878 DOI: 10.1186/s13148-024-01692-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 06/04/2024] [Indexed: 06/13/2024] Open
Abstract
Diabetes mellitus is a chronic disease that impairs metabolism, and its prevalence has reached an epidemic proportion globally. Most people affected are with type 2 diabetes mellitus (T2DM), which is caused by a decline in the numbers or functioning of pancreatic endocrine islet cells, specifically the β-cells that release insulin in sufficient quantity to overcome any insulin resistance of the metabolic tissues. Genetic and epigenetic factors have been implicated as the main contributors to the T2DM. Epigenetic modifiers, histone deacetylases (HDACs), are enzymes that remove acetyl groups from histones and play an important role in a variety of molecular processes, including pancreatic cell destiny, insulin release, insulin production, insulin signalling, and glucose metabolism. HDACs also govern other regulatory processes related to diabetes, such as oxidative stress, inflammation, apoptosis, and fibrosis, revealed by network and functional analysis. This review explains the current understanding of the function of HDACs in diabetic pathophysiology, the inhibitory role of various HDAC inhibitors (HDACi), and their functional importance as biomarkers and possible therapeutic targets for T2DM. While their role in T2DM is still emerging, a better understanding of the role of HDACi may be relevant in improving insulin sensitivity, protecting β-cells and reducing T2DM-associated complications, among others.
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Affiliation(s)
- Kukkala Kiran Kumar
- Department of Anatomy, College of Medicine and Health Sciences, United Arab Emirates University, PO Box 15551, Al Ain, Abu Dhabi, United Arab Emirates
| | - Elhadi Husein Aburawi
- Department of Pediatrics, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi, United Arab Emirates
| | - Milos Ljubisavljevic
- Department of Physiology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi, United Arab Emirates
- Duke-NUS Medical School, Cardiovascular and Metabolic Disorders Program, Singapore, Singapore
| | - Melvin Khee Shing Leow
- LKC School of Medicine, Nanyang Technological University, Singapore, Singapore
- Dept of Endocrinology, Tan Tock Seng Hospital, Singapore, Singapore
- Duke-NUS Medical School, Cardiovascular and Metabolic Disorders Program, Singapore, Singapore
| | - Xu Feng
- Department of Biochemistry, YLL School of Medicine, National University of Singapore, Singapore, Singapore
| | - Suraiya Anjum Ansari
- Department of Biochemistry, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi, United Arab Emirates
- Zayed Center for Health Sciences, United Arab Emirates University, Abu Dhabi, United Arab Emirates
- ASPIRE Precision Medicine Research Institute, Abu Dhabi, United Arab Emirates
| | - Bright Starling Emerald
- Department of Anatomy, College of Medicine and Health Sciences, United Arab Emirates University, PO Box 15551, Al Ain, Abu Dhabi, United Arab Emirates.
- Zayed Center for Health Sciences, United Arab Emirates University, Abu Dhabi, United Arab Emirates.
- ASPIRE Precision Medicine Research Institute, Abu Dhabi, United Arab Emirates.
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Yu X, Xu J. TWIST1 Drives Cytotoxic CD8+ T-Cell Exhaustion through Transcriptional Activation of CD274 (PD-L1) Expression in Breast Cancer Cells. Cancers (Basel) 2024; 16:1973. [PMID: 38893094 PMCID: PMC11171171 DOI: 10.3390/cancers16111973] [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: 04/12/2024] [Revised: 05/15/2024] [Accepted: 05/18/2024] [Indexed: 06/21/2024] Open
Abstract
In breast cancer, epithelial-mesenchymal transition (EMT) is positively associated with programmed death ligand 1 (PD-L1) expression and immune escape, and TWIST1 silences ERα expression and induces EMT and cancer metastasis. However, how TWIST1 regulates PD-L1 and immune evasion is unknown. This study analyzed TWIST1 and PD-L1 expression in breast cancers, investigated the mechanism for TWIST1 to regulate PD-L1 transcription, and assessed the effects of TWIST1 and PD-L1 in cancer cells on cytotoxic CD8+ T cells. Interestingly, TWIST1 expression is correlated with high-level PD-L1 expression in ERα-negative breast cancer cells. The overexpression and knockdown of TWIST1 robustly upregulate and downregulate PD-L1 expression, respectively. TWIST1 binds to the PD-L1 promoter and recruits the TIP60 acetyltransferase complex in a BRD8-dependent manner to transcriptionally activate PD-L1 expression, which significantly accelerates the exhaustion and death of the cytotoxic CD8+ T cells. Accordingly, knockdown of TWIST1 or BRD8 or inhibition of PD-L1 significantly enhances the tumor antigen-specific CD8+ T cells to suppress the growth of breast cancer cells. These results demonstrate that TWIST1 directly induces PD-L1 expression in ERα-negative breast cancer cells to promote immune evasion. Targeting TWIST1, BRD8, and/or PD-L1 in ERα-negative breast cancer cells with TWIST1 expression may sensitize CD8+ T-cell-mediated immunotherapy.
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Affiliation(s)
- Xiaobin Yu
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA;
| | - Jianming Xu
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA;
- Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
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Zhang C, Shan Y, Lin H, Zhang Y, Xing Q, Zhu J, Zhou T, Lin A, Chen Q, Wang J, Pan G. HBO1 determines SMAD action in pluripotency and mesendoderm specification. Nucleic Acids Res 2024; 52:4935-4949. [PMID: 38421638 PMCID: PMC11109972 DOI: 10.1093/nar/gkae158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 02/11/2024] [Accepted: 02/20/2024] [Indexed: 03/02/2024] Open
Abstract
TGF-β signaling family plays an essential role to regulate fate decisions in pluripotency and lineage specification. How the action of TGF-β family signaling is intrinsically executed remains not fully elucidated. Here, we show that HBO1, a MYST histone acetyltransferase (HAT) is an essential cell intrinsic determinant for TGF-β signaling in human embryonic stem cells (hESCs). HBO1-/- hESCs fail to response to TGF-β signaling to maintain pluripotency and spontaneously differentiate into neuroectoderm. Moreover, HBO1 deficient hESCs show complete defect in mesendoderm specification in BMP4-triggered gastruloids or teratomas. Molecularly, HBO1 interacts with SMAD4 and co-binds the open chromatin labeled by H3K14ac and H3K4me3 in undifferentiated hESCs. Upon differentiation, HBO1/SMAD4 co-bind and maintain the mesoderm genes in BMP4-triggered mesoderm cells while lose chromatin occupancy in neural cells induced by dual-SMAD inhibition. Our data reveal an essential role of HBO1, a chromatin factor to determine the action of SMAD in both human pluripotency and mesendoderm specification.
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Affiliation(s)
- Cong Zhang
- Key Laboratory of Immune Response and Immunotherapy, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530,China; Guangzhou Medical University, Guangzhou 511436, China
- Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangdong-Hong Kong Joint Laboratory for Stem Cell and Regenerative Medicine, Center for Cell Lineage and Cell Therapy, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
- GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, GIBH-CUHK Joint Research Laboratory on Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
| | - Yongli Shan
- Key Laboratory of Immune Response and Immunotherapy, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530,China; Guangzhou Medical University, Guangzhou 511436, China
- Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangdong-Hong Kong Joint Laboratory for Stem Cell and Regenerative Medicine, Center for Cell Lineage and Cell Therapy, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
- GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, GIBH-CUHK Joint Research Laboratory on Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
| | - Huaisong Lin
- Key Laboratory of Immune Response and Immunotherapy, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530,China; Guangzhou Medical University, Guangzhou 511436, China
- Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangdong-Hong Kong Joint Laboratory for Stem Cell and Regenerative Medicine, Center for Cell Lineage and Cell Therapy, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
- GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, GIBH-CUHK Joint Research Laboratory on Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
| | - Yanqi Zhang
- Key Laboratory of Immune Response and Immunotherapy, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530,China; Guangzhou Medical University, Guangzhou 511436, China
- Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangdong-Hong Kong Joint Laboratory for Stem Cell and Regenerative Medicine, Center for Cell Lineage and Cell Therapy, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
- GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, GIBH-CUHK Joint Research Laboratory on Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
| | - Qi Xing
- Key Laboratory of Immune Response and Immunotherapy, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530,China; Guangzhou Medical University, Guangzhou 511436, China
- Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangdong-Hong Kong Joint Laboratory for Stem Cell and Regenerative Medicine, Center for Cell Lineage and Cell Therapy, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
- GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, GIBH-CUHK Joint Research Laboratory on Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
| | - Jinmin Zhu
- Key Laboratory of Immune Response and Immunotherapy, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530,China; Guangzhou Medical University, Guangzhou 511436, China
- Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangdong-Hong Kong Joint Laboratory for Stem Cell and Regenerative Medicine, Center for Cell Lineage and Cell Therapy, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
- GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, GIBH-CUHK Joint Research Laboratory on Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
| | - Tiancheng Zhou
- Key Laboratory of Immune Response and Immunotherapy, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530,China; Guangzhou Medical University, Guangzhou 511436, China
- Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangdong-Hong Kong Joint Laboratory for Stem Cell and Regenerative Medicine, Center for Cell Lineage and Cell Therapy, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
- GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, GIBH-CUHK Joint Research Laboratory on Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
| | - Aiping Lin
- Key Laboratory of Immune Response and Immunotherapy, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530,China; Guangzhou Medical University, Guangzhou 511436, China
- Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangdong-Hong Kong Joint Laboratory for Stem Cell and Regenerative Medicine, Center for Cell Lineage and Cell Therapy, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
- GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, GIBH-CUHK Joint Research Laboratory on Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
| | - Qianyu Chen
- Key Laboratory of Immune Response and Immunotherapy, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530,China; Guangzhou Medical University, Guangzhou 511436, China
- Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangdong-Hong Kong Joint Laboratory for Stem Cell and Regenerative Medicine, Center for Cell Lineage and Cell Therapy, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
- GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, GIBH-CUHK Joint Research Laboratory on Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
| | - Junwei Wang
- Key Laboratory of Immune Response and Immunotherapy, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530,China; Guangzhou Medical University, Guangzhou 511436, China
- Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangdong-Hong Kong Joint Laboratory for Stem Cell and Regenerative Medicine, Center for Cell Lineage and Cell Therapy, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
- GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, GIBH-CUHK Joint Research Laboratory on Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
| | - Guangjin Pan
- Key Laboratory of Immune Response and Immunotherapy, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530,China; Guangzhou Medical University, Guangzhou 511436, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Chinese Academy of Sciences, Hong Kong
- Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangdong-Hong Kong Joint Laboratory for Stem Cell and Regenerative Medicine, Center for Cell Lineage and Cell Therapy, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
- GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, GIBH-CUHK Joint Research Laboratory on Stem Cell and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 510530, China
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Li T, Petreaca RC, Forsburg SL. Chromodomain mutation in S. pombe Kat5/Mst1 affects centromere dynamics and DNA repair. PLoS One 2024; 19:e0300732. [PMID: 38662722 PMCID: PMC11045136 DOI: 10.1371/journal.pone.0300732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 03/04/2024] [Indexed: 04/28/2024] Open
Abstract
KAT5 (S. pombe Mst1, human TIP60) is a MYST family histone acetyltransferase conserved from yeast to humans that is involved in multiple cellular activities. This family is characterized in part by containing a chromodomain, a motif associated with binding methylated histones. We show that a chromodomain mutation in the S. pombe Kat5, mst1-W66R, has defects in pericentromere silencing. mst1-W66R is sensitive to camptothecin (CPT) but only at an increased temperature of 36°C, although it is proficient for growth at this temperature. We also describe a de-silencing effect at the pericentromere by CPT that is independent of RNAi and methylation machinery. We also show that mst1-W66R disrupts recruitment of proteins to repair foci in response to camptothecin-induced DNA damage. Our data suggest a function of Mst1 chromodomain in centromere heterochromatin formation and a separate role in genome-wide damage repair in CPT.
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Affiliation(s)
- Tingting Li
- Program in Molecular & Computational Biology, Department of Biological Sciences, University of Southern California, Los Angeles, CA, United States of America
| | - Ruben C. Petreaca
- Program in Molecular & Computational Biology, Department of Biological Sciences, University of Southern California, Los Angeles, CA, United States of America
| | - Susan L. Forsburg
- Program in Molecular & Computational Biology, Department of Biological Sciences, University of Southern California, Los Angeles, CA, United States of America
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5
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Kalamuddin M, Shakri AR, Wang C, Min H, Li X, Cui L, Miao J. MYST regulates DNA repair and forms a NuA4-like complex in the malaria parasite Plasmodium falciparum. mSphere 2024; 9:e0014024. [PMID: 38564734 PMCID: PMC11036802 DOI: 10.1128/msphere.00140-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 03/13/2024] [Indexed: 04/04/2024] Open
Abstract
Histone lysine acetyltransferase MYST-associated NuA4 complex is conserved from yeast to humans and plays key roles in cell cycle regulation, gene transcription, and DNA replication/repair. Here, we identified a Plasmodium falciparum MYST-associated complex, PfNuA4, which contains 11 of the 13 conserved NuA4 subunits. Reciprocal pulldowns using PfEAF2, a shared component between the NuA4 and SWR1 complexes, not only confirmed the PfNuA4 complex but also identified the PfSWR1 complex, a histone remodeling complex, although their identities are low compared to the homologs in yeast or humans. Notably, both H2A.Z/H2B.Z were associated with the PfSWR1 complex, indicating that this complex is involved in the deposition of H2A.Z/H2B.Z, the variant histone pair that is enriched in the activated promoters. Overexpression of PfMYST resulted in earlier expression of genes involved in cell cycle regulation, DNA replication, and merozoite invasion, and upregulation of the genes related to antigenic variation and DNA repair. Consistently, PfMYST overexpression led to high basal phosphorylated PfH2A (γ-PfH2A), the mark of DNA double-strand breaks, and conferred protection against genotoxic agent methyl methanesulfonate (MMS), X-rays, and artemisinin, the first-line antimalarial drug. In contrast, the knockdown of PfMYST caused a delayed parasite recovery upon MMS treatment. MMS induced the gradual disappearance of PfMYST in the cytoplasm and concomitant accumulation of PfMYST in the nucleus, suggesting cytoplasm-nucleus shuttling of PfMYST. Meanwhile, PfMYST colocalized with the γ-PfH2A, indicating PfMYST was recruited to the DNA damage sites. Collectively, PfMYST plays critical roles in cell cycle regulation, gene transcription, and DNA replication/DNA repair in this low-branching parasitic protist.IMPORTANCEUnderstanding gene regulation and DNA repair in malaria parasites is critical for identifying targets for antimalarials. This study found PfNuA4, a PfMYST-associated, histone modifier complex, and PfSWR1, a chromatin remodeling complex in malaria parasite Plasmodium falciparum. These complexes are divergent due to the low identities compared to their homologs from yeast and humans. Furthermore, overexpression of PfMYST resulted in substantial transcriptomic changes, indicating that PfMYST is involved in regulating the cell cycle, antigenic variation, and DNA replication/repair. Consistently, PfMYST was found to protect against DNA damage caused by the genotoxic agent methyl methanesulfonate, X-rays, and artemisinin, the first-line antimalarial drug. Additionally, DNA damage led to the relocation of cytoplasmic PfMYST to the nucleus and colocalization of PfMYST with γ-PfH2A, the mark of DNA damage. In summary, this study demonstrated that the PfMYST complex has critical functions in regulating cell cycle, antigenic variation, and DNA replication/DNA repair in P. falciparum.
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Affiliation(s)
- Mohammad Kalamuddin
- Department of Internal Medicine, University of South Florida, Morsani College of Medicine, Tampa, Florida, USA
| | - Ahmad Rushdi Shakri
- Department of Internal Medicine, University of South Florida, Morsani College of Medicine, Tampa, Florida, USA
| | - Chengqi Wang
- Center for Global Health and Infectious Diseases Research, College of Public Health, University of South Florida, Tampa, Florida, USA
| | - Hui Min
- Department of Internal Medicine, University of South Florida, Morsani College of Medicine, Tampa, Florida, USA
| | - Xiaolian Li
- Department of Internal Medicine, University of South Florida, Morsani College of Medicine, Tampa, Florida, USA
| | - Liwang Cui
- Department of Internal Medicine, University of South Florida, Morsani College of Medicine, Tampa, Florida, USA
- Center for Global Health and Infectious Diseases Research, College of Public Health, University of South Florida, Tampa, Florida, USA
| | - Jun Miao
- Department of Internal Medicine, University of South Florida, Morsani College of Medicine, Tampa, Florida, USA
- Center for Global Health and Infectious Diseases Research, College of Public Health, University of South Florida, Tampa, Florida, USA
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Liu W, Liu X, Li L, Tai Z, Li G, Liu JX. EPC1/2 regulate hematopoietic stem and progenitor cell proliferation by modulating H3 acetylation and DLST. iScience 2024; 27:109263. [PMID: 38439957 PMCID: PMC10910311 DOI: 10.1016/j.isci.2024.109263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 09/21/2023] [Accepted: 02/14/2024] [Indexed: 03/06/2024] Open
Abstract
Enhancers of polycomb 1 (EPC1) and 2 (EPC2) are involved in multiple biological processes as components of histone acetyltransferases/deacetylase complexes and transcriptional cofactors, and their dysfunction was associated with developmental defects and diseases. However, it remains unknown how their dysfunction induces hematopoietic stem and progenitor cell (HSPC) defects. Here, we show that depletion of EPC1/2 significantly reduced the number of hematopoietic stem and progenitor cells (HSPCs) in the aorta-gonad mesonephros and caudal hematopoietic tissue regions by impairing HSPC proliferation, and consistently downregulated the expression of HSPC genes in K562 cells. This study demonstrates the functions of EPC1/2 in regulating histone H3 acetylation, and in regulating DLST (dihydrolipoamide S-succinyltransferase) via H3 acetylation and cooperating with transcription factors serum response factor and FOXR2 together, and in the subsequent HSPC emergence and proliferation. Our results demonstrate the essential roles of EPC1/2 in regulating H3 acetylation, and DLST as a linkage between EPC1 and EPC2 with mitochondria metabolism, in HSPC emergence and proliferation.
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Affiliation(s)
- WenYe Liu
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China
| | - Xi Liu
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China
| | - LingYa Li
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China
| | - ZhiPeng Tai
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China
| | - GuoLiang Li
- College of Informatics, Agricultural Bioinformatics Key Laboratory of Hubei Province, Hubei Engineering Technology Research Center of Agricultural Big Data, Huazhong Agricultural University, Wuhan 430070, China
| | - Jing-Xia Liu
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China
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An HM, Dai YF, Zhu J, Liu W, Wang XP. MYST family histone acetyltransferases regulate reproductive diapause initiation. Int J Biol Macromol 2024; 256:128269. [PMID: 38029912 DOI: 10.1016/j.ijbiomac.2023.128269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 11/17/2023] [Accepted: 11/17/2023] [Indexed: 12/01/2023]
Abstract
Histone acetylation, a crucial epigenetic mechanism, has been suggested to play a role in diapause regulation, but this has not been confirmed through gene loss-of-function studies. In this work, we investigated the involvement of MYST family genes, which are key writers of histone acetylation, in initiating reproductive diapause using the cabbage beetle Colaphellus bowringi as a model. We identified C. bowringi orthologs of MYST, including Tip60, KAT6A, KAT7, and KAT8, from previous transcriptomes. Analyses of phylogenetic trees and protein domains indicated that these MYST proteins are structurally conserved across animal species. Expression of these MYST genes was found to be enriched in heads and ovaries of C. bowringi. Under reproductive photoperiod conditions, RNAi targeting MYST genes, especially KAT8, suppressed ovarian growth and yolk deposition, resembling the characteristics of diapausing ovaries. Additionally, KAT8 knockdown led to the upregulation of diapause-related genes, such as heat shock proteins and diapause protein 1, and the emergence of diapause-like guts. Moreover, KAT8 knockdown reduced the expression of a crucial enzyme involved in juvenile hormone (JH) biosynthesis, likely due to decreased H4K16ac levels. Consequently, our findings suggest that MYST family genes, specifically KAT8, influence the JH signal, thereby regulating the initiation of reproductive diapause.
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Affiliation(s)
- Hao-Min An
- Hubei Key Laboratory of Insect Resources Utilization and Sustainable Pest Management, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yi-Fei Dai
- Hubei Key Laboratory of Insect Resources Utilization and Sustainable Pest Management, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jun Zhu
- Hubei Key Laboratory of Insect Resources Utilization and Sustainable Pest Management, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Wen Liu
- Hubei Key Laboratory of Insect Resources Utilization and Sustainable Pest Management, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiao-Ping Wang
- Hubei Key Laboratory of Insect Resources Utilization and Sustainable Pest Management, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
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Yu X, He T, Tong Z, Liao L, Huang S, Fakhouri WD, Edwards DP, Xu J. Molecular mechanisms of TWIST1-regulated transcription in EMT and cancer metastasis. EMBO Rep 2023; 24:e56902. [PMID: 37680145 PMCID: PMC10626429 DOI: 10.15252/embr.202356902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 08/23/2023] [Accepted: 08/25/2023] [Indexed: 09/09/2023] Open
Abstract
TWIST1 induces epithelial-to-mesenchymal transition (EMT) to drive cancer metastasis. It is yet unclear what determines TWIST1 functions to activate or repress transcription. We found that the TWIST1 N-terminus antagonizes TWIST1-regulated gene expression, cancer growth and metastasis. TWIST1 interacts with both the NuRD complex and the NuA4/TIP60 complex (TIP60-Com) via its N-terminus. Non-acetylated TWIST1-K73/76 selectively interacts with and recruits NuRD to repress epithelial target gene transcription. Diacetylated TWIST1-acK73/76 binds BRD8, a component of TIP60-Com that also binds histone H4-acK5/8, to recruit TIP60-Com to activate mesenchymal target genes and MYC. Knockdown of BRD8 abolishes TWIST1 and TIP60-Com interaction and TIP60-Com recruitment to TWIST1-activated genes, resulting in decreasing TWIST1-activated target gene expression and cancer metastasis. Both TWIST1/NuRD and TWIST1/TIP60-Com complexes are required for TWIST1 to promote EMT, proliferation, and metastasis at full capacity. Therefore, the diacetylation status of TWIST1-K73/76 dictates whether TWIST1 interacts either with NuRD to repress epithelial genes, or with TIP60-Com to activate mesenchymal genes and MYC. Since BRD8 is essential for TWIST1-acK73/76 and TIP60-Com interaction, targeting BRD8 could be a means to inhibit TWIST1-activated gene expression.
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Affiliation(s)
- Xiaobin Yu
- Department of Molecular and Cellular BiologyBaylor College of MedicineHoustonTXUSA
| | - Tao He
- Department of Molecular and Cellular BiologyBaylor College of MedicineHoustonTXUSA
- Present address:
Institute for Cancer MedicineSouthwest Medical UniversitySichuanChina
| | - Zhangwei Tong
- Department of Molecular and Cellular BiologyBaylor College of MedicineHoustonTXUSA
| | - Lan Liao
- Department of Molecular and Cellular BiologyBaylor College of MedicineHoustonTXUSA
- Dan L. Duncan Comprehensive Cancer CenterBaylor College of MedicineHoustonTXUSA
| | - Shixia Huang
- Department of Molecular and Cellular BiologyBaylor College of MedicineHoustonTXUSA
- Dan L. Duncan Comprehensive Cancer CenterBaylor College of MedicineHoustonTXUSA
| | - Walid D Fakhouri
- Department of Diagnostic and Biomedical Sciences, Center for Craniofacial Research, School of DentistryUniversity of Texas Health Science Center at HoustonHoustonTXUSA
| | - Dean P Edwards
- Department of Molecular and Cellular BiologyBaylor College of MedicineHoustonTXUSA
- Dan L. Duncan Comprehensive Cancer CenterBaylor College of MedicineHoustonTXUSA
| | - Jianming Xu
- Department of Molecular and Cellular BiologyBaylor College of MedicineHoustonTXUSA
- Dan L. Duncan Comprehensive Cancer CenterBaylor College of MedicineHoustonTXUSA
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9
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Mah SY, Vanyai HK, Yang Y, Voss AK, Thomas T. The chromatin reader protein ING5 is required for normal hematopoietic cell numbers in the fetal liver. Front Immunol 2023; 14:1119750. [PMID: 37275850 PMCID: PMC10232820 DOI: 10.3389/fimmu.2023.1119750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 04/18/2023] [Indexed: 06/07/2023] Open
Abstract
ING5 is a component of KAT6A and KAT7 histone lysine acetylation protein complexes. ING5 contains a PHD domain that binds to histone H3 lysine 4 when it is trimethylated, and so functions as a 'reader' and adaptor protein. KAT6A and KAT7 function are critical for normal hematopoiesis. To examine the function of ING5 in hematopoiesis, we generated a null allele of Ing5. Mice lacking ING5 during development had decreased foetal liver cellularity, decreased numbers of hematopoietic stem cells and perturbed erythropoiesis compared to wild-type control mice. Ing5-/- pups had hypoplastic spleens. Competitive transplantation experiments using foetal liver hematopoietic cells showed that there was no defect in long-term repopulating capacity of stem cells lacking ING5, suggesting that the defects during the foetal stage were not cell intrinsic. Together, these results suggest that ING5 function is dispensable for normal hematopoiesis but may be required for timely foetal hematopoiesis in a cell-extrinsic manner.
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Affiliation(s)
- Sophia Y.Y. Mah
- Epigenetics and Development Division, Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia
- Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Hannah K. Vanyai
- Epigenetics and Development Division, Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia
- Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Yuqing Yang
- Epigenetics and Development Division, Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia
- Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Anne K. Voss
- Epigenetics and Development Division, Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia
- Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Tim Thomas
- Epigenetics and Development Division, Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia
- Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
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10
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VRK1 Kinase Activity Modulating Histone H4K16 Acetylation Inhibited by SIRT2 and VRK-IN-1. Int J Mol Sci 2023; 24:ijms24054912. [PMID: 36902348 PMCID: PMC10003087 DOI: 10.3390/ijms24054912] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/27/2023] [Accepted: 03/01/2023] [Indexed: 03/08/2023] Open
Abstract
The accessibility of DNA to different cellular functions requires a dynamic regulation of chromatin organization that is mediated by different epigenetic modifications, which regulate chromatin accessibility and degree of compaction. These epigenetic modifications, particularly the acetylation of histone H4 in lysine 14 (H4K16ac), determine the degree of chromatin accessibility to different nuclear functions, as well as to DNA damage drugs. H4K16ac is regulated by the balance between two alternative histone modifications, acetylation and deacetylation, which are mediated by acetylases and deacetylases. Tip60/KAT5 acetylates, and SIRT2 deacetylates histone H4K16. However, the balance between these two epigenetic enzymes is unknown. VRK1 regulates the level of H4K16 acetylation by activating Tip60. We have shown that the VRK1 and SIRT2 are able to form a stable protein complex. For this work, we used in vitro interaction, pull-down and in vitro kinase assays. In cells, their interaction and colocalization were detected by immunoprecipitation and immunofluorescence. The kinase activity of VRK1 is inhibited by a direct interaction of its N-terminal kinase domain with SIRT2 in vitro. This interaction causes a loss of H4K16ac similarly to the effect of a novel VRK1 inhibitor (VRK-IN-1) or VRK1 depletion. The use of specific SIRT2 inhibitors in lung adenocarcinoma cells induces H4K16ac, contrary to the novel VRK-IN-1 inhibitor, which prevents H4K16ac and a correct DNA damage response. Therefore, the inhibition of SIRT2 can cooperate with VRK1 in the accessibility of drugs to chromatin in response to DNA damage caused by doxorubicin.
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11
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Tominaga K, Sakashita E, Kasashima K, Kuroiwa K, Nagao Y, Iwamori N, Endo H. Tip60/KAT5 Histone Acetyltransferase Is Required for Maintenance and Neurogenesis of Embryonic Neural Stem Cells. Int J Mol Sci 2023; 24:ijms24032113. [PMID: 36768434 PMCID: PMC9916716 DOI: 10.3390/ijms24032113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 01/25/2023] Open
Abstract
Epigenetic regulation via epigenetic factors in collaboration with tissue-specific transcription factors is curtail for establishing functional organ systems during development. Brain development is tightly regulated by epigenetic factors, which are coordinately activated or inactivated during processes, and their dysregulation is linked to brain abnormalities and intellectual disability. However, the precise mechanism of epigenetic regulation in brain development and neurogenesis remains largely unknown. Here, we show that Tip60/KAT5 deletion in neural stem/progenitor cells (NSCs) in mice results in multiple abnormalities of brain development. Tip60-deficient embryonic brain led to microcephaly, and proliferating cells in the developing brain were reduced by Tip60 deficiency. In addition, neural differentiation and neuronal migration were severely affected in Tip60-deficient brains. Following neurogenesis in developing brains, gliogenesis started from the earlier stage of development in Tip60-deficient brains, indicating that Tip60 is involved in switching from neurogenesis to gliogenesis during brain development. It was also confirmed in vitro that poor neurosphere formation, proliferation defects, neural differentiation defects, and accelerated astrocytic differentiation in mutant NSCs are derived from Tip60-deficient embryonic brains. This study uncovers the critical role of Tip60 in brain development and NSC maintenance and function in vivo and in vitro.
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Affiliation(s)
- Kaoru Tominaga
- Division of Structural Biochemistry, Department of Biochemistry, Jichi Medical University, Tochigi 321-0498, Japan
- Division of Functional Biochemistry, Department of Biochemistry, Jichi Medical University, Tochigi 321-0498, Japan
- Correspondence: (K.T.); (N.I.)
| | - Eiji Sakashita
- Division of Functional Biochemistry, Department of Biochemistry, Jichi Medical University, Tochigi 321-0498, Japan
| | - Katsumi Kasashima
- Division of Functional Biochemistry, Department of Biochemistry, Jichi Medical University, Tochigi 321-0498, Japan
| | - Kenji Kuroiwa
- Division of Functional Biochemistry, Department of Biochemistry, Jichi Medical University, Tochigi 321-0498, Japan
| | - Yasumitsu Nagao
- Center for Experimental Medicine, Jichi Medical University, Tochigi 321-0498, Japan
| | - Naoki Iwamori
- Department of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
- Correspondence: (K.T.); (N.I.)
| | - Hitoshi Endo
- Division of Functional Biochemistry, Department of Biochemistry, Jichi Medical University, Tochigi 321-0498, Japan
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12
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Feng J, Meng X. Histone modification and histone modification-targeted anti-cancer drugs in breast cancer: Fundamentals and beyond. Front Pharmacol 2022; 13:946811. [PMID: 36188615 PMCID: PMC9522521 DOI: 10.3389/fphar.2022.946811] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 08/15/2022] [Indexed: 12/21/2022] Open
Abstract
Dysregulated epigenetic enzymes and resultant abnormal epigenetic modifications (EMs) have been suggested to be closely related to tumor occurrence and progression. Histone modifications (HMs) can assist in maintaining genome stability, DNA repair, transcription, and chromatin modulation within breast cancer (BC) cells. In addition, HMs are reversible, dynamic processes involving the associations of different enzymes with molecular compounds. Abnormal HMs (e.g. histone methylation and histone acetylation) have been identified to be tightly related to BC occurrence and development, even though their underlying mechanisms remain largely unclear. EMs are reversible, and as a result, epigenetic enzymes have aroused wide attention as anti-tumor therapeutic targets. At present, treatments to restore aberrant EMs within BC cells have entered preclinical or clinical trials. In addition, no existing studies have comprehensively analyzed aberrant HMs within BC cells; in addition, HM-targeting BC treatments remain to be further investigated. Histone and non-histone protein methylation is becoming an attractive anti-tumor epigenetic therapeutic target; such methylation-related enzyme inhibitors are under development at present. Consequently, the present work focuses on summarizing relevant studies on HMs related to BC and the possible mechanisms associated with abnormal HMs. Additionally, we also aim to analyze existing therapeutic agents together with those drugs approved and tested through pre-clinical and clinical trials, to assess their roles in HMs. Moreover, epi-drugs that target HMT inhibitors and HDAC inhibitors should be tested in preclinical and clinical studies for the treatment of BC. Epi-drugs that target histone methylation (HMT inhibitors) and histone acetylation (HDAC inhibitors) have now entered clinical trials or are approved by the US Food and Drug Administration (FDA). Therefore, the review covers the difficulties in applying HM-targeting treatments in clinics and proposes feasible approaches for overcoming such difficulties and promoting their use in treating BC cases.
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13
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The synthesis of PROTAC molecule and new target KAT6A identification of CDK9 inhibitor iCDK9. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.107741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Lashgari A, Kougnassoukou Tchara PE, Lambert JP, Côté J. New insights into the DNA repair pathway choice with NuA4/TIP60. DNA Repair (Amst) 2022; 113:103315. [PMID: 35278769 DOI: 10.1016/j.dnarep.2022.103315] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 02/14/2022] [Accepted: 03/02/2022] [Indexed: 11/03/2022]
Abstract
In eukaryotic cells, DNA double-strand breaks (DSBs) can be repaired through two main pathways, non-homologous end-joining (NHEJ) or homologous recombination (HR). The selection of the repair pathway choice is governed by an antagonistic relationship between repair factors specific to each pathway, in a cell cycle-dependent manner. The molecular mechanisms of this decision implicate post-translational modifications of chromatin surrounding the break. Here, we discuss the recent advances regarding the function of the NuA4/TIP60 histone acetyltransferase/chromatin remodeling complex during DSBs repair. In particular, we emphasise the contribution of NuA4/TIP60 in repair pathway choice, in collaboration with the SAGA acetyltransferase complex, and how they regulate chromatin dynamics, modify non-histone substrates to allow DNA end resection and recombination.
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Affiliation(s)
- Anahita Lashgari
- St-Patrick Research Group in Basic Oncology, Canada; Laval University Cancer Research Center, CHU de Québec-Université Laval Research Center, Quebec City, QC, Canada; Department of Molecular Medicine, Big Data Research Center, Université Laval, Quebec, Canada
| | - Pata-Eting Kougnassoukou Tchara
- Laval University Cancer Research Center, CHU de Québec-Université Laval Research Center, Quebec City, QC, Canada; Department of Molecular Medicine, Big Data Research Center, Université Laval, Quebec, Canada
| | - Jean-Philippe Lambert
- Laval University Cancer Research Center, CHU de Québec-Université Laval Research Center, Quebec City, QC, Canada; Department of Molecular Medicine, Big Data Research Center, Université Laval, Quebec, Canada.
| | - Jacques Côté
- St-Patrick Research Group in Basic Oncology, Canada; Laval University Cancer Research Center, CHU de Québec-Université Laval Research Center, Quebec City, QC, Canada.
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15
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Histone modifications in neurodifferentiation of embryonic stem cells. Heliyon 2022; 8:e08664. [PMID: 35028451 PMCID: PMC8741459 DOI: 10.1016/j.heliyon.2021.e08664] [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: 09/30/2021] [Revised: 11/25/2021] [Accepted: 12/21/2021] [Indexed: 11/30/2022] Open
Abstract
Post-translational modifications of histone proteins regulate a long cascade of downstream cellular activities, including transcription and replication. Cellular lineage differentiation involves large-scale intracellular signaling and extracellular context. In particular, histone modifications play instructive and programmatic roles in central nervous system development. Deciphering functions of histone could offer feasible molecular strategies for neural diseases caused by histone modifications. Here, we review recent advances of in vitro and in vivo studies on histone modifications in neural differentiation.
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16
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Ahmad T, Ashraf W, Ibrahim A, Zaayter L, Muller CD, Hamiche A, Mély Y, Bronner C, Mousli M. TIP60 governs the auto‑ubiquitination of UHRF1 through USP7 dissociation from the UHRF1/USP7 complex. Int J Oncol 2021; 59:89. [PMID: 34558642 PMCID: PMC8480382 DOI: 10.3892/ijo.2021.5269] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 05/05/2021] [Indexed: 12/11/2022] Open
Abstract
Tat interactive protein, 60 kDa (TIP60) is an important partner of ubiquitin-like, containing PHD and RING finger domains 1 (UHRF1), ensuring various cellular processes through its acetyltransferase activity. TIP60 is believed to play a tumor suppressive role, partly explained by its downregulated expression in a number of cancers. The aim of the present study was to investigate the role and mechanisms of action of TIP60 in the regulation of UHRF1 expression. The results revealed that TIP60 overexpression downregulated the UHRF1 and DNA methyltransferase 1 (DNMT1) expression levels. TIP60 interfered with USP7-UHRF1 association and induced the degradation of UHRF1 in an auto-ubiquitination-dependent manner. Moreover, TIP60 activated the p73-mediated apoptotic pathway. Taken together, the data of the present study suggest that the tumor suppressor role of TIP60 is mediated by its regulation to UHRF1.
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Affiliation(s)
- Tanveer Ahmad
- Laboratory of Bioimaging and Pathologies, CNRS UMR‑7021, Faculty of Pharmacy, University of Strasbourg, 67401 Illkirch, France
| | - Waseem Ashraf
- Laboratory of Bioimaging and Pathologies, CNRS UMR‑7021, Faculty of Pharmacy, University of Strasbourg, 67401 Illkirch, France
| | - Abdulkhaleg Ibrahim
- Institute of Genetics and Molecular and Cellular Biology (IGBMC), INSERM U1258 CNRS UMR 7104, University of Strasbourg, 67400 Illkirch, France
| | - Liliyana Zaayter
- Laboratory of Bioimaging and Pathologies, CNRS UMR‑7021, Faculty of Pharmacy, University of Strasbourg, 67401 Illkirch, France
| | - Christian D Muller
- Hubert Curien Pluridisciplinary Institute (IPHC), CNRS UMR‑7178, University of Strasbourg, 67401 Illkirch, France
| | - Ali Hamiche
- Institute of Genetics and Molecular and Cellular Biology (IGBMC), INSERM U1258 CNRS UMR 7104, University of Strasbourg, 67400 Illkirch, France
| | - Yves Mély
- Laboratory of Bioimaging and Pathologies, CNRS UMR‑7021, Faculty of Pharmacy, University of Strasbourg, 67401 Illkirch, France
| | - Christian Bronner
- Institute of Genetics and Molecular and Cellular Biology (IGBMC), INSERM U1258 CNRS UMR 7104, University of Strasbourg, 67400 Illkirch, France
| | - Marc Mousli
- Laboratory of Bioimaging and Pathologies, CNRS UMR‑7021, Faculty of Pharmacy, University of Strasbourg, 67401 Illkirch, France
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17
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Au YZ, Gu M, De Braekeleer E, Gozdecka M, Aspris D, Tarumoto Y, Cooper J, Yu J, Ong SH, Chen X, Tzelepis K, Huntly BJP, Vassiliou G, Yusa K. KAT7 is a genetic vulnerability of acute myeloid leukemias driven by MLL rearrangements. Leukemia 2021; 35:1012-1022. [PMID: 32764680 PMCID: PMC7610570 DOI: 10.1038/s41375-020-1001-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 07/15/2020] [Accepted: 07/22/2020] [Indexed: 12/13/2022]
Abstract
Histone acetyltransferases (HATs) catalyze the transfer of an acetyl group from acetyl-CoA to lysine residues of histones and play a central role in transcriptional regulation in diverse biological processes. Dysregulation of HAT activity can lead to human diseases including developmental disorders and cancer. Through genome-wide CRISPR-Cas9 screens, we identified several HATs of the MYST family as fitness genes for acute myeloid leukemia (AML). Here we investigate the essentiality of lysine acetyltransferase KAT7 in AMLs driven by the MLL-X gene fusions. We found that KAT7 loss leads to a rapid and complete loss of both H3K14ac and H4K12ac marks, in association with reduced proliferation, increased apoptosis, and differentiation of AML cells. Acetyltransferase activity of KAT7 is essential for the proliferation of these cells. Mechanistically, our data propose that acetylated histones provide a platform for the recruitment of MLL-fusion-associated adaptor proteins such as BRD4 and AF4 to gene promoters. Upon KAT7 loss, these factors together with RNA polymerase II rapidly dissociate from several MLL-fusion target genes that are essential for AML cell proliferation, including MEIS1, PBX3, and SENP6. Our findings reveal that KAT7 is a plausible therapeutic target for this poor prognosis AML subtype.
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MESH Headings
- Apoptosis/genetics
- Biomarkers, Tumor
- Cell Differentiation
- Cell Line, Tumor
- Disease Management
- Epigenesis, Genetic
- Gene Knockout Techniques
- Gene Rearrangement
- Genetic Association Studies
- Genetic Predisposition to Disease
- Histone Acetyltransferases/genetics
- Histone Acetyltransferases/metabolism
- Histone-Lysine N-Methyltransferase/genetics
- Histone-Lysine N-Methyltransferase/metabolism
- Histones/metabolism
- Humans
- Leukemia, Myeloid, Acute/diagnosis
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/metabolism
- Leukemia, Myeloid, Acute/therapy
- Myeloid Cells/metabolism
- Myeloid Cells/pathology
- Myeloid-Lymphoid Leukemia Protein/genetics
- Myeloid-Lymphoid Leukemia Protein/metabolism
- Oncogene Proteins, Fusion/genetics
- Oncogene Proteins, Fusion/metabolism
- Promoter Regions, Genetic
- Protein Binding
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Affiliation(s)
- Yan Zi Au
- Stem Cell Genetics, Wellcome Sanger Institute, Hinxton, Cambridge, UK
- Haematological Cancer Genetics, Wellcome Sanger Institute, Hinxton, Cambridge, UK
- Dana-Farber Cancer Institute, Boston, MA, USA
| | - Muxin Gu
- Haematological Cancer Genetics, Wellcome Sanger Institute, Hinxton, Cambridge, UK
| | | | - Malgorzata Gozdecka
- Haematological Cancer Genetics, Wellcome Sanger Institute, Hinxton, Cambridge, UK
- Wellcome Trust-MRC Stem Cell Institute, Cambridge Biomedical Campus, University of Cambridge, Cambridge, UK
| | - Demetrios Aspris
- Haematological Cancer Genetics, Wellcome Sanger Institute, Hinxton, Cambridge, UK
| | - Yusuke Tarumoto
- Stem Cell Genetics, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Jonathan Cooper
- Haematological Cancer Genetics, Wellcome Sanger Institute, Hinxton, Cambridge, UK
| | - Jason Yu
- Stem Cell Genetics, Wellcome Sanger Institute, Hinxton, Cambridge, UK
- Department of Cell Biology, The Francis Crick Institute, London, UK
| | - Swee Hoe Ong
- Stem Cell Genetics, Wellcome Sanger Institute, Hinxton, Cambridge, UK
| | - Xi Chen
- Gene Expression Genomics, Wellcome Sanger Institute, Hinxton, Cambridge, UK
| | - Konstantinos Tzelepis
- Haematological Cancer Genetics, Wellcome Sanger Institute, Hinxton, Cambridge, UK
- Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge, UK
| | - Brian J P Huntly
- Wellcome Trust-MRC Stem Cell Institute, Cambridge Biomedical Campus, University of Cambridge, Cambridge, UK
- Department of Haematology, Cambridge University Hospitals NHS Trust, Cambridge, UK
- Cambridge Institute for Medical Research, University of Cambridge, Cambridge, UK
| | - George Vassiliou
- Haematological Cancer Genetics, Wellcome Sanger Institute, Hinxton, Cambridge, UK.
- Wellcome Trust-MRC Stem Cell Institute, Cambridge Biomedical Campus, University of Cambridge, Cambridge, UK.
- Department of Haematology, Cambridge University Hospitals NHS Trust, Cambridge, UK.
| | - Kosuke Yusa
- Stem Cell Genetics, Wellcome Sanger Institute, Hinxton, Cambridge, UK.
- Stem Cell Genetics, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan.
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18
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Li T, Petreaca RC, Forsburg SL. Schizosaccharomyces pombe KAT5 contributes to resection and repair of a DNA double-strand break. Genetics 2021; 218:6173406. [PMID: 33723569 DOI: 10.1093/genetics/iyab042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 03/04/2021] [Indexed: 11/14/2022] Open
Abstract
Chromatin remodeling is essential for effective repair of a DNA double-strand break (DSB). KAT5 (Schizosaccharomyces pombe Mst1, human TIP60) is a MYST family histone acetyltransferase conserved from yeast to humans that coordinates various DNA damage response activities at a DNA DSB, including histone remodeling and activation of the DNA damage checkpoint. In S. pombe, mutations in mst1+ causes sensitivity to DNA damaging drugs. Here we show that Mst1 is recruited to DSBs. Mutation of mst1+ disrupts recruitment of repair proteins and delays resection. These defects are partially rescued by deletion of pku70, which has been previously shown to antagonize repair by homologous recombination (HR). These phenotypes of mst1 are similar to pht1-4KR, a nonacetylatable form of histone variant H2A.Z, which has been proposed to affect resection. Our data suggest that Mst1 functions to direct repair of DSBs toward HR pathways by modulating resection at the DSB.
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Affiliation(s)
- Tingting Li
- Program of Molecular and Computational Biology, University of Southern California, Los Angeles, CA 90089-2910, USA
| | - Ruben C Petreaca
- Program of Molecular and Computational Biology, University of Southern California, Los Angeles, CA 90089-2910, USA
- Department of Molecular Genetics, Ohio State University, Marion, OH 43302, USA
| | - Susan L Forsburg
- Program of Molecular and Computational Biology, University of Southern California, Los Angeles, CA 90089-2910, USA
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19
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Garcinol-A Natural Histone Acetyltransferase Inhibitor and New Anti-Cancer Epigenetic Drug. Int J Mol Sci 2021; 22:ijms22062828. [PMID: 33799504 PMCID: PMC8001519 DOI: 10.3390/ijms22062828] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/04/2021] [Accepted: 03/06/2021] [Indexed: 12/11/2022] Open
Abstract
Garcinol extracted from Garcinia indica fruit peel and leaves is a polyisoprenylated benzophenone. In traditional medicine it was used for its antioxidant and anti-inflammatory properties. Several studies have shown anti-cancer properties of garcinol in cancer cell lines and experimental animal models. Garcinol action in cancer cells is based on its antioxidant and anti-inflammatory properties, but also on its potency to inhibit histone acetyltransferases (HATs). Recent studies indicate that garcinol may also deregulate expression of miRNAs involved in tumour development and progression. This paper focuses on the latest research concerning garcinol as a HAT inhibitor and miRNA deregulator in the development and progression of various cancers. Garcinol may be considered as a candidate for next generation epigenetic drugs, but further studies are needed to establish the precise toxicity, dosages, routes of administration, and safety for patients.
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20
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Stelman CR, Smith BM, Chandra B, Roberts-Galbraith RH. CBP/p300 homologs CBP2 and CBP3 play distinct roles in planarian stem cell function. Dev Biol 2021; 473:130-143. [PMID: 33607113 DOI: 10.1016/j.ydbio.2021.02.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 02/08/2021] [Accepted: 02/09/2021] [Indexed: 11/19/2022]
Abstract
Chromatin modifications function as critical regulators of gene expression and cellular identity, especially in the regulation and maintenance of the pluripotent state. However, many studies of chromatin modification in stem cells-and pluripotent stem cells in particular-are performed in mammalian stem cell culture, an in vitro condition mimicking a very transient state during mammalian development. Thus, new models for studying pluripotent stem cells in vivo could be helpful for understanding the roles of chromatin modification, for confirming prior in vitro studies, and for exploring evolution of the pluripotent state. The freshwater flatworm, Schmidtea mediterranea, is an excellent model for studying adult pluripotent stem cells, particularly in the context of robust, whole-body regeneration. To identify chromatin modifying and remodeling enzymes critical for planarian regeneration and stem cell maintenance, we took a candidate approach and screened planarian homologs of 25 genes known to regulate chromatin biology in other organisms. Through our study, we identified six genes with novel functions in planarian homeostasis, regeneration, and behavior. Of the list of genes characterized, we identified five planarian homologs of the mammalian CREB-Binding Protein (CBP) and p300 family of histone acetyltransferases, representing an expansion of this family in planarians. We find that two planarian CBP family members are required for planarian survival, with knockdown of Smed-CBP2 and Smed-CBP3 causing distinct defects in stem cell maintenance or function. Loss of CBP2 causes a quick, dramatic loss of stem cells, while knockdown of CBP3 affects stem cells more narrowly, influencing differentiation of several cell types that include neuronal subtypes and cells of the eye. Further, we find that Smed-CBP1 is required for planarian fissioning behavior. We propose that the division of labor among a diversified CBP family in planarians presents an opportunity to dissect specific functions of a broadly important histone acetyltransferase family.
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Affiliation(s)
- Clara R Stelman
- Department of Molecular and Cellular Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Britessia M Smith
- Department of Cellular Biology, University of Georgia, Athens, GA, USA
| | - Bidushi Chandra
- Department of Cellular Biology, University of Georgia, Athens, GA, USA
| | - Rachel H Roberts-Galbraith
- Department of Molecular and Cellular Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA; Department of Cellular Biology, University of Georgia, Athens, GA, USA.
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21
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Shanmugam MK, Dharmarajan A, Warrier S, Bishayee A, Kumar AP, Sethi G, Ahn KS. Role of histone acetyltransferase inhibitors in cancer therapy. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2020; 125:149-191. [PMID: 33931138 DOI: 10.1016/bs.apcsb.2020.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The development of cancer is a complex phenomenon driven by various extrinsic as well as intrinsic risk factors including epigenetic modifications. These post-translational modifications are encountered in diverse cancer cells and appear for a relatively short span of time. These changes can significantly affect various oncogenic genes and proteins involved in cancer initiation and progression. Histone lysine acetylation and deacetylation processes are controlled by two opposing classes of enzymes that modulate gene regulation either by adding an acetyl moiety on a histone lysine residue by histone lysine acetyltransferases (KATs) or via removing it by histone deacetylases (KDACs). Deregulated KAT activity has been implicated in the development of several diseases including cancer and can be targeted for the development of anti-neoplastic drugs. Here, we describe the predominant epigenetic changes that can affect key KAT superfamily members during carcinogenesis and briefly highlight the pharmacological potential of employing lysine acetyltransferase inhibitors (KATi) for cancer therapy.
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Affiliation(s)
- Muthu K Shanmugam
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Arunasalam Dharmarajan
- Department of Biomedical Sciences, Faculty of Biomedical Sciences Technology and Research, Sri Ramachandra Institute of Higher Education & Research, Chennai, India
| | - Sudha Warrier
- Division of Cancer Stem Cells and Cardiovascular Regeneration, Manipal Institute of Regenerative Medicine, Manipal University, Bangalore, India
| | - Anupam Bishayee
- Lake Erie College of Osteopathic Medicine, Bradenton, FL, United States
| | - Alan Prem Kumar
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore; Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Gautam Sethi
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
| | - Kwang Seok Ahn
- Department of Science in Korean Medicine, College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea.
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22
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Gujral P, Mahajan V, Lissaman AC, Ponnampalam AP. Histone acetylation and the role of histone deacetylases in normal cyclic endometrium. Reprod Biol Endocrinol 2020; 18:84. [PMID: 32791974 PMCID: PMC7425564 DOI: 10.1186/s12958-020-00637-5] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 07/29/2020] [Indexed: 12/22/2022] Open
Abstract
Histone acetylation is a critical epigenetic modification that changes chromatin architecture and regulates gene expression by opening or closing the chromatin structure. It plays an essential role in cell cycle progression and differentiation. The human endometrium goes through cycles of regeneration, proliferation, differentiation, and degradation each month; each phase requiring strict epigenetic regulation for the proper functioning of the endometrium. Aberrant histone acetylation and alterations in levels of two acetylation modulators - histone acetylases (HATs) and histone deacetylases (HDACs) - have been associated with endometrial pathologies such as endometrial cancer, implantation failures, and endometriosis. Thus, histone acetylation is likely to have an essential role in the regulation of endometrial remodelling throughout the menstrual cycle.
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Affiliation(s)
- Palak Gujral
- The Liggins Institute, The University of Auckland, Auckland, New Zealand
| | - Vishakha Mahajan
- The Liggins Institute, The University of Auckland, Auckland, New Zealand
- Department of Obstetrics and Gynaecology, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
| | - Abbey C Lissaman
- The Liggins Institute, The University of Auckland, Auckland, New Zealand
- Department of Obstetrics and Gynaecology, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
| | - Anna P Ponnampalam
- The Liggins Institute, The University of Auckland, Auckland, New Zealand.
- Department of Obstetrics and Gynaecology, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand.
- Department of Physiology, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand.
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23
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Zhang LX, Lemire G, Gonzaga-Jauregui C, Molidperee S, Galaz-Montoya C, Liu DS, Verloes A, Shillington AG, Izumi K, Ritter AL, Keena B, Zackai E, Li D, Bhoj E, Tarpinian JM, Bedoukian E, Kukolich MK, Innes AM, Ediae GU, Sawyer SL, Nair KM, Soumya PC, Subbaraman KR, Probst FJ, Bassetti JA, Sutton RV, Gibbs RA, Brown C, Boone PM, Holm IA, Tartaglia M, Ferrero GB, Niceta M, Dentici ML, Radio FC, Keren B, Wells CF, Coubes C, Laquerrière A, Aziza J, Dubucs C, Nampoothiri S, Mowat D, Patel MS, Bracho A, Cammarata-Scalisi F, Gezdirici A, Fernandez-Jaen A, Hauser N, Zarate YA, Bosanko KA, Dieterich K, Carey JC, Chong JX, Nickerson DA, Bamshad MJ, Lee BH, Yang XJ, Lupski JR, Campeau PM. Further delineation of the clinical spectrum of KAT6B disorders and allelic series of pathogenic variants. Genet Med 2020; 22:1338-1347. [PMID: 32424177 DOI: 10.1038/s41436-020-0811-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 04/09/2020] [Accepted: 04/09/2020] [Indexed: 11/09/2022] Open
Abstract
PURPOSE Genitopatellar syndrome and Say-Barber-Biesecker-Young-Simpson syndrome are caused by variants in the KAT6B gene and are part of a broad clinical spectrum called KAT6B disorders, whose variable expressivity is increasingly being recognized. METHODS We herein present the phenotypes of 32 previously unreported individuals with a molecularly confirmed diagnosis of a KAT6B disorder, report 24 new pathogenic KAT6B variants, and review phenotypic information available on all published individuals with this condition. We also suggest a classification of clinical subtypes within the KAT6B disorder spectrum. RESULTS We demonstrate that cerebral anomalies, optic nerve hypoplasia, neurobehavioral difficulties, and distal limb anomalies other than long thumbs and great toes, such as polydactyly, are more frequently observed than initially reported. Intestinal malrotation and its serious consequences can be present in affected individuals. Additionally, we identified four children with Pierre Robin sequence, four individuals who had increased nuchal translucency/cystic hygroma prenatally, and two fetuses with severe renal anomalies leading to renal failure. We also report an individual in which a pathogenic variant was inherited from a mildly affected parent. CONCLUSION Our work provides a comprehensive review and expansion of the genotypic and phenotypic spectrum of KAT6B disorders that will assist clinicians in the assessment, counseling, and management of affected individuals.
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Affiliation(s)
- Li Xin Zhang
- Sainte-Justine Hospital Research Center, University of Montreal, Montreal, QC, Canada
| | - Gabrielle Lemire
- Division of Medical Genetics, Department of Pediatrics, CHU Sainte-Justine, University of Montreal, Montreal, QC, Canada
| | | | - Sirinart Molidperee
- Sainte-Justine Hospital Research Center, University of Montreal, Montreal, QC, Canada
| | - Carolina Galaz-Montoya
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - David S Liu
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Alain Verloes
- Department of Genetics and INSERM UMR1141, APHP-Nord Université de Paris, Robert DEBRE Hospital, Paris and ERN-ITHACA, Paris, France
| | - Amelle G Shillington
- Department of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Kosuke Izumi
- Division of Human Genetics, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Alyssa L Ritter
- Division of Human Genetics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Beth Keena
- Division of Human Genetics, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Elaine Zackai
- Division of Human Genetics, Children's Hospital of Philadelphia, Philadelphia, PA, USA.,Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Dong Li
- Center for Applied Genomics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Elizabeth Bhoj
- Division of Human Genetics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Jennifer M Tarpinian
- Roberts Individualized Medical Genetics Center, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Emma Bedoukian
- Roberts Individualized Medical Genetics Center, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | | | - A Micheil Innes
- Department of Medical Genetics and Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada
| | - Grace U Ediae
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, ON, Canada
| | - Sarah L Sawyer
- Department of Genetics, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | | | - Para Chottil Soumya
- Department of Pediatrics, Government Medical College, Kozhikode, Kerala, India
| | | | - Frank J Probst
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Texas Children's Hospital, Houston, TX, USA
| | - Jennifer A Bassetti
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Texas Children's Hospital, Houston, TX, USA
| | - Reid V Sutton
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Texas Children's Hospital, Houston, TX, USA
| | - Richard A Gibbs
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Chester Brown
- University of Tennessee Health Science Center, Le Bonheur Children's Hospital, Memphis, TN, USA
| | - Philip M Boone
- Division of Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Ingrid A Holm
- Division of Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Marco Tartaglia
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | | | - Marcello Niceta
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | - Maria Lisa Dentici
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | | | - Boris Keren
- Genetic department, AP-HP, Sorbonne Université, Paris, France
| | - Constance F Wells
- Service de Génétique Clinique, Département de Génétique Médicale, Maladies Rares et Médecine Personnalisée, CHU de Montpellier, Montpellier, France
| | - Christine Coubes
- Service de Génétique Clinique, Département de Génétique Médicale, Maladies Rares et Médecine Personnalisée, CHU de Montpellier, Montpellier, France
| | - Annie Laquerrière
- Department of Pathology, Centre for Genomic and Personalized Medicine, UNIROUEN Normandie University, Inserm U1245, Normandy, Rouen, France
| | - Jacqueline Aziza
- Département anatomie et cytologie pathologiques, CHU Toulouse, Toulouse, France
| | - Charlotte Dubucs
- Département anatomie et cytologie pathologiques, CHU Toulouse, Toulouse, France
| | - Sheela Nampoothiri
- Department of Pediatric Genetics, Amrita Institute of Medical Sciences and Research Centre, Cochin, Kerala, India
| | - David Mowat
- Centre for Clinical Genetics, Sydney Children's Hospital Randwick, Sydney, Australia
| | - Millan S Patel
- BC Children's Hospital Research Institute and Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Ana Bracho
- Genetic Research Institute, University of Zulia, Maracaibo, Venezuela
| | | | - Alper Gezdirici
- Department of Medical Genetics, Istanbul Health Science University, Kanuni Sultan Suleyman Training and Research Hospital, Istanbul, Turkey
| | - Alberto Fernandez-Jaen
- Department of Pediatric Neurology, Hospital Quirónsalud School of Medicine, Universidad Europea, Madrid, Spain
| | | | - Yuri A Zarate
- Department of Pediatrics, Section of Genetics and Metabolism, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Katherine A Bosanko
- Department of Pediatrics, Section of Genetics and Metabolism, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Klaus Dieterich
- Medical Genetics, CHU Grenoble Alpes, Université Grenoble Alpes, Inserm, U1216, GIN, Grenoble, France
| | - John C Carey
- Division of Medical Genetics, Department of Pediatrics, University of Utah Health, Salt Lake City, UT, USA
| | - Jessica X Chong
- Department of Pediatrics, University of Washington, Seattle, WA, USA.,Brotman-Baty Institute for Precision Medicine, Seattle, WA, USA
| | - Deborah A Nickerson
- Brotman-Baty Institute for Precision Medicine, Seattle, WA, USA.,Department of Genome Sciences, University of Washington, Seattle, WA, USA
| | - Michael J Bamshad
- Department of Pediatrics, University of Washington, Seattle, WA, USA.,Brotman-Baty Institute for Precision Medicine, Seattle, WA, USA
| | - Brendan H Lee
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Xiang-Jiao Yang
- Goodman Cancer Center, Department of Medicine, McGill University, Montreal, QC, Canada
| | - James R Lupski
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Texas Children's Hospital, Houston, TX, USA
| | - Philippe M Campeau
- Division of Medical Genetics, Department of Pediatrics, CHU Sainte-Justine, University of Montreal, Montreal, QC, Canada.
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24
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Kueh AJ, Eccles S, Tang L, Garnham AL, May RE, Herold MJ, Smyth GK, Voss AK, Thomas T. HBO1 (KAT7) Does Not Have an Essential Role in Cell Proliferation, DNA Replication, or Histone 4 Acetylation in Human Cells. Mol Cell Biol 2020; 40:e00506-19. [PMID: 31767635 PMCID: PMC6996278 DOI: 10.1128/mcb.00506-19] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 11/11/2019] [Indexed: 01/01/2023] Open
Abstract
HBO1 (MYST2/KAT7) is essential for histone 3 lysine 14 acetylation (H3K14ac) but is dispensable for H4 acetylation and DNA replication in mouse tissues. In contrast, previous studies using small interfering RNA (siRNA) knockdown in human cell lines have suggested that HBO1 is essential for DNA replication. To determine if HBO1 has distinctly different roles in immortalized human cell lines and normal mouse cells, we performed siRNA knockdown of HBO1. In addition, we used CRISPR/Cas9 to generate 293T, MCF7, and HeLa cell lines lacking HBO1. Using both techniques, we show that HBO1 is essential for all H3K14ac in human cells and is unlikely to have a direct effect on H4 acetylation and only has minor effects on cell proliferation. Surprisingly, the loss of HBO1 and H3K14ac in HeLa cells led to the secondary loss of almost all H4 acetylation after 4 weeks. Thus, HBO1 is dispensable for DNA replication and cell proliferation in immortalized human cells. However, while cell proliferation proceeded without HBO1 and H3K14ac, HBO1 gene deletion led to profound changes in cell adhesion, particularly in 293T cells. Consistent with this phenotype, the loss of HBO1 in both 293T and HeLa principally affected genes mediating cell adhesion, with comparatively minor effects on other cellular processes.
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Affiliation(s)
- Andrew J Kueh
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Samantha Eccles
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
| | - Leonie Tang
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Alexandra L Garnham
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Rose E May
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
| | - Marco J Herold
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Gordon K Smyth
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
- Department of Mathematics and Statistics, University of Melbourne, Parkville, Victoria, Australia
| | - Anne K Voss
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Tim Thomas
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
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25
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Bai Z, Xia X, Lu J. MicroRNA-639 is Down-Regulated in Hepatocellular Carcinoma Tumor Tissue and Inhibits Proliferation and Migration of Human Hepatocellular Carcinoma Cells Through the KAT7/Wnt/β-Catenin Pathway. Med Sci Monit 2020; 26:e919241. [PMID: 31955177 PMCID: PMC6988476 DOI: 10.12659/msm.919241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background This study aimed to investigate the expression of microRNA-639 (miR-639) in tumor tissue from patients with hepatocellular carcinoma (HCC) and its effects on patient outcome, to identify the targets for miR-639 using bioinformatics and luciferase reporter analysis, and the effects of miR-639 in human HCC cells in vitro to identify the molecular pathways involved. Material/Methods Expression levels of miR-639 were compared in tumor tissue and adjacent normal liver tissue from 50 patients with HCC, and Kaplan-Meier curves identified the association with overall survival (OS). miR-639 expression was measured in HCC cells cultured in vitro using quantitative reverse transcription-polymerase chain reaction (RT-qPCR) and Western blot. HCC cells were studied using the MTT assay, the colony formation assay, and the transwell assay. Bioinformatics and luciferase reporter analysis identified the role of the histone acetyltransferase gene, KAT7, in HCC. Results The expression of miR-639 was significantly reduced in HCC tissues compared with normal adjacent liver tissues, and inhibited cell proliferation and epithelial-mesenchymal transition (EMT) of HCC cells. Bioinformatics and luciferase reporter analysis showed that miR-639 directly targeted KAT7 and inhibit its expression. KAT7 expression promoted cell proliferation, and migration of human HCC cells in vitro, and miR-639 inhibited cell proliferation and EMT by down-regulating the KAT7/Wnt/β-catenin signaling pathway. Conclusions miR-639 was down-regulated in HCC tumor tissue, and inhibited proliferation and migration of HCC cells by the down-regulation of KAT7/Wnt/β-catenin signaling and was associated with reduced OS. These findings supported the potential role of miR-639 as a tumor suppressor.
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Affiliation(s)
- Zhijie Bai
- Department of Urology, Tianjin First Center Hospital, Tianjin, China (mainland)
| | - Xiaopu Xia
- Department of General Surgery, First Central Clinical College, Tianjin Medical University, Tianjin, China (mainland)
| | - Jianfeng Lu
- Department of Pathology, Tianjin First Center Hospital, Tianjin, China (mainland)
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26
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Espinosa-Cores L, Bouza-Morcillo L, Barrero-Gil J, Jiménez-Suárez V, Lázaro A, Piqueras R, Jarillo JA, Piñeiro M. Insights Into the Function of the NuA4 Complex in Plants. FRONTIERS IN PLANT SCIENCE 2020; 11:125. [PMID: 32153620 PMCID: PMC7047200 DOI: 10.3389/fpls.2020.00125] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 01/28/2020] [Indexed: 05/14/2023]
Abstract
Chromatin remodeling plays a key role in the establishment and maintenance of gene expression patterns essential for plant development and responses to environmental factors. Post-translational modification of histones, including acetylation, is one of the most relevant chromatin remodeling mechanisms that operate in eukaryotic cells. Histone acetylation is an evolutionarily conserved chromatin signature commonly associated with transcriptional activation. Histone acetylation levels are tightly regulated through the antagonistic activity of histone acetyltransferases (HATs) and histone deacetylases (HDACs). In plants, different families of HATs are present, including the MYST family, which comprises homologs of the catalytic subunit of the Nucleosome Acetyltransferase of H4 (NuA4) complex in yeast. This complex mediates acetylation of histones H4, H2A, and H2A.Z, and is involved in transcriptional regulation, heterochromatin silencing, cell cycle progression, and DNA repair in yeast. In Arabidopsis and, other plant species, homologs for most of the yeast NuA4 subunits are present and although the existence of this complex has not been demonstrated yet, compelling evidence supports the notion that this type of HAT complex functions from mosses to angiosperms. Recent proteomic studies show that several Arabidopsis homologs of NuA4 components, including the assembly platform proteins and the catalytic subunit, are associated in vivo with additional members of this complex suggesting that a NuA4-like HAT complex is present in plants. Furthermore, the functional characterization of some Arabidopsis NuA4 subunits has uncovered the involvement of these proteins in the regulation of different plant biological processes. Interestingly, for most of the mutant plants deficient in subunits of this complex characterized so far, conspicuous defects in flowering time are observed, suggesting a role for NuA4 in the control of this plant developmental program. Moreover, the participation of Arabidopsis NuA4 homologs in other developmental processes, such as gametophyte development, as well as in cell proliferation and stress and hormone responses, has also been reported. In this review, we summarize the current state of knowledge on plant putative NuA4 subunits and discuss the latest progress concerning the function of this chromatin modifying complex.
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27
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UHRF1-KAT7-mediated regulation of TUSC3 expression via histone methylation/acetylation is critical for the proliferation of colon cancer cells. Oncogene 2019; 39:1018-1030. [PMID: 31582837 DOI: 10.1038/s41388-019-1032-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 09/13/2019] [Accepted: 09/18/2019] [Indexed: 01/24/2023]
Abstract
The epigenetic factor UHRF1 regulates transcription by modulating DNA methylation and histone modification, and plays critical roles in proliferation, development, and tumorigenesis. Here, we show that Wnt/c-Myc signaling upregulates UHRF1, which in turn downregulates TUSC3, a candidate tumor suppressor gene that is frequently deleted or downregulated in several cancers. We also show that UHRF1-mediated downregulation of TUSC3 is required for the proliferation of colon cancer cells. Furthermore, we demonstrate that UHRF1 suppresses TUSC3 expression by interacting with methylated H3K14 and thereby suppressing the acetylation of H3K14 by the histone acetyltransferase KAT7. Our study provides evidence for the significance of UHRF1-KAT7-mediated regulation of histone methylation/acetylation in the proliferation of tumor cells and in a diverse set of biological processes controlled by Wnt/c-Myc signaling.
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28
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Leaver DJ, Cleary B, Nguyen N, Priebbenow DL, Lagiakos HR, Sanchez J, Xue L, Huang F, Sun Y, Mujumdar P, Mudududdla R, Varghese S, Teguh S, Charman SA, White KL, Katneni K, Cuellar M, Strasser JM, Dahlin JL, Walters MA, Street IP, Monahan BJ, Jarman KE, Sabroux HJ, Falk H, Chung MC, Hermans SJ, Parker MW, Thomas T, Baell JB. Discovery of Benzoylsulfonohydrazides as Potent Inhibitors of the Histone Acetyltransferase KAT6A. J Med Chem 2019; 62:7146-7159. [DOI: 10.1021/acs.jmedchem.9b00665] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | | | | | | | - H. Rachel Lagiakos
- Cancer Therapeutics CRC, 343 Royal Parade, Parkville, Victoria 3052, Australia
| | - Julie Sanchez
- Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria 3050, Australia
| | - Lian Xue
- School of Pharmaceutical Sciences, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing 211816, People’s Republic of China
| | - Fei Huang
- School of Pharmaceutical Sciences, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing 211816, People’s Republic of China
| | | | | | | | | | | | | | | | | | - Matthew Cuellar
- Institute for Therapeutics Discovery and Development, University of Minnesota, 717 Delaware Street SE, Minneapolis, Minnesota 55455, United States
| | - Jessica M. Strasser
- Institute for Therapeutics Discovery and Development, University of Minnesota, 717 Delaware Street SE, Minneapolis, Minnesota 55455, United States
| | - Jayme L. Dahlin
- Department of Pathology, Brigham and Women’s Hospital, Boston, 75 Francis Street, Boston, Massachusetts 02115, United States
| | - Michael A. Walters
- Institute for Therapeutics Discovery and Development, University of Minnesota, 717 Delaware Street SE, Minneapolis, Minnesota 55455, United States
| | - Ian P. Street
- Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3052, Australia
- Cancer Therapeutics CRC, 343 Royal Parade, Parkville, Victoria 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria 3050, Australia
| | - Brendon J. Monahan
- Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3052, Australia
- Cancer Therapeutics CRC, 343 Royal Parade, Parkville, Victoria 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria 3050, Australia
| | - Kate E. Jarman
- Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria 3050, Australia
| | - Helene Jousset Sabroux
- Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria 3050, Australia
| | - Hendrik Falk
- Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3052, Australia
- Cancer Therapeutics CRC, 343 Royal Parade, Parkville, Victoria 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria 3050, Australia
| | - Matthew C. Chung
- ACRF Rational Drug Discovery Centre, St. Vincent’s Institute of Medical Research, Fitzroy, Victoria 3065, Australia
| | - Stefan J. Hermans
- ACRF Rational Drug Discovery Centre, St. Vincent’s Institute of Medical Research, Fitzroy, Victoria 3065, Australia
| | - Michael W. Parker
- ACRF Rational Drug Discovery Centre, St. Vincent’s Institute of Medical Research, Fitzroy, Victoria 3065, Australia
| | - Tim Thomas
- Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3052, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Victoria 3050, Australia
| | - Jonathan B. Baell
- School of Pharmaceutical Sciences, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing 211816, People’s Republic of China
- ARC Centre for Fragment-Based Design, Monash University, Parkville, Victoria 3052, Australia
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29
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The Role of DNA/Histone Modifying Enzymes and Chromatin Remodeling Complexes in Testicular Germ Cell Tumors. Cancers (Basel) 2018; 11:cancers11010006. [PMID: 30577487 PMCID: PMC6357018 DOI: 10.3390/cancers11010006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 12/10/2018] [Accepted: 12/18/2018] [Indexed: 12/22/2022] Open
Abstract
It is well established that cancer cells exhibit alterations in chromatin structure and accessibility. Indeed, the dysregulation of many protein-coding players with enzymatic activity (DNA and histone-modifying enzymes) and chromatin remodelers have been depicted in various tumor models in recent years. Still, little attention has been directed towards testicular germ cell tumors (TGCTs)-representing the most common neoplasm among young adult Caucasian men-with most studies focusing on exploring the role of DNA methyltransferases (DNMTs) and DNA demethylases (TETs). TGCTs represent a complex tumor model, associated with developmental and embryogenesis-related phenomena, and display seldom (cyto)genetic aberrations, leaving room for Epigenetics to explain such morphological and clinical diversity. Herein, we have summarized the major findings that were reported in literature regarding the dysregulation of DNA/histone-modifying enzymes and chromatin remodelers in TGCTs. Additionally, we performed in silico analysis of The Cancer Genome Atlas database to find the most relevant of those players in TGCTs. We concluded that several DNA/histone-modifying enzymes and chromatin remodelers may serve as biomarkers for subtyping, dictating prognosis and survival, and, possibly, for serving as targets of directed, less toxic therapies.
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Emerging Role of Histone Acetyltransferase in Stem Cells and Cancer. Stem Cells Int 2018; 2018:8908751. [PMID: 30651738 PMCID: PMC6311713 DOI: 10.1155/2018/8908751] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 10/16/2018] [Accepted: 10/29/2018] [Indexed: 01/02/2023] Open
Abstract
Protein acetylation is one of the most important posttranslational modifications catalyzed by acetyltransferases and deacetylases, through the addition and removal of acetyl groups to lysine residues. Lysine acetylation can affect protein-nucleic acid or protein-protein interactions and protein localization, transport, stability, and activity. It regulates the function of a large variety of proteins, including histones, oncoproteins, tumor suppressors, and transcription factors, thus representing a crucial regulator of several biological processes with particular prominent roles in transcription and metabolism. Thus, it is unsurprising that alteration of protein acetylation is involved in human disease, including metabolic disorders and cancers. In this context, different hematological and solid tumors are characterized by deregulation of the protein acetylation pattern as a result of genetic or epigenetic changes. The imbalance between acetylation and deacetylation of histone or nonhistone proteins is also involved in the modulation of the self-renewal and differentiation ability of stem cells, including cancer stem cells. Here, we summarize a combination of in vitro and in vivo studies, undertaken on a set of acetyltransferases, and discuss the physiological and pathological roles of this class of enzymes. We also review the available data on the involvement of acetyltransferases in the regulation of stem cell renewal and differentiation in both normal and cancer cell population.
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31
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McCarthy A, Deiulio A, Martin ET, Upadhyay M, Rangan P. Tip60 complex promotes expression of a differentiation factor to regulate germline differentiation in female Drosophila. Mol Biol Cell 2018; 29:2933-2945. [PMID: 30230973 PMCID: PMC6329907 DOI: 10.1091/mbc.e18-06-0385] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 09/06/2018] [Accepted: 09/13/2018] [Indexed: 01/23/2023] Open
Abstract
Germline stem cells (GSCs) self-renew and differentiate to sustain a continuous production of gametes. In the female Drosophila germ line, two differentiation factors, bag of marbles ( bam) and benign gonial cell neoplasm ( bgcn), work in concert in the stem cell daughter to promote the generation of eggs. In GSCs, bam transcription is repressed by signaling from the niche and is activated in stem cell daughters. In contrast, bgcn is transcribed in both the GSCs and stem cell daughters, but little is known about how bgcn is transcriptionally modulated. Here we find that the conserved protein Nipped-A acts through the Tat interactive protein 60-kDa (Tip60) histone acetyl transferase complex in the germ line to promote GSC daughter differentiation. We find that Nipped-A is required for efficient exit from the gap phase 2 (G2) of cell cycle of the GSC daughter and for expression of a differentiation factor, bgcn. Loss of Nipped-A results in accumulation of GSC daughters . Forced expression of bgcn in Nipped-A germline-depleted ovaries rescues this differentiation defect. Together, our results indicate that Tip60 complex coordinates cell cycle progression and expression of bgcn to help drive GSC daughters toward a differentiation program.
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Affiliation(s)
- Alicia McCarthy
- Department of Biological Sciences/RNA Institute, University at Albany SUNY, Albany, NY 12222
| | - Aron Deiulio
- Department of Biological Sciences/RNA Institute, University at Albany SUNY, Albany, NY 12222
| | - Elliot Todd Martin
- Department of Biological Sciences/RNA Institute, University at Albany SUNY, Albany, NY 12222
| | - Maitreyi Upadhyay
- Department of Biological Sciences/RNA Institute, University at Albany SUNY, Albany, NY 12222
| | - Prashanth Rangan
- Department of Biological Sciences/RNA Institute, University at Albany SUNY, Albany, NY 12222
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32
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Huang F. New KAT6 inhibitors induce senescence and arrest cancer growth. Synth Syst Biotechnol 2018; 3:244-245. [PMID: 30417138 PMCID: PMC6215967 DOI: 10.1016/j.synbio.2018.10.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 10/23/2018] [Indexed: 12/20/2022] Open
Abstract
Lysine acetyltransferases (KATs) catalyze lysine acetylation, a reversible protein modification implicated in a wide variety of disease states. Histone acetyltransferases (HATs) comprise a KAT sub-class that acetylate specific lysines in histones, hence playing an important role in the regulation of chromatin organization and function. HATs are critical regulators of signaling in many diseases, including cancer. KAT6A (also known as monocytic leukemia zinc finger protein, MOZ) and KAT6B (also known as MORF and QKF) belong to the MYST family of HATs, that comprise KAT5-KAT8. They are the targets of chromosomal translocations identified in acute myeloid leukaemia and various cancers. It seems logical therefore that inhibition of KAT6A and KAT6B may provide a therapeutic benefit in cancer. Baell et al. discovered a new class of anti-cancer drug that can put cancer cells into a permanent sleep or senescence, using high-throughput screening followed by medicinal chemistry optimization, in-cell assays, biochemical assessment of target engagement, and tumour models in mice and fish. This research showed promise in arresting tumour growth in pre-clinical models of blood and liver cancers as well as delaying or stopping relapse without damaging the cells' DNA or some harmful side-effects caused by chemotherapy and radiotherapy.
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Affiliation(s)
- Fei Huang
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing, China
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33
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Baell JB, Leaver DJ, Hermans SJ, Kelly GL, Brennan MS, Downer NL, Nguyen N, Wichmann J, McRae HM, Yang Y, Cleary B, Lagiakos HR, Mieruszynski S, Pacini G, Vanyai HK, Bergamasco MI, May RE, Davey BK, Morgan KJ, Sealey AJ, Wang B, Zamudio N, Wilcox S, Garnham AL, Sheikh BN, Aubrey BJ, Doggett K, Chung MC, de Silva M, Bentley J, Pilling P, Hattarki M, Dolezal O, Dennis ML, Falk H, Ren B, Charman SA, White KL, Rautela J, Newbold A, Hawkins ED, Johnstone RW, Huntington ND, Peat TS, Heath JK, Strasser A, Parker MW, Smyth GK, Street IP, Monahan BJ, Voss AK, Thomas T. Inhibitors of histone acetyltransferases KAT6A/B induce senescence and arrest tumour growth. Nature 2018; 560:253-257. [PMID: 30069049 DOI: 10.1038/s41586-018-0387-5] [Citation(s) in RCA: 167] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Accepted: 06/21/2018] [Indexed: 12/19/2022]
Abstract
Acetylation of histones by lysine acetyltransferases (KATs) is essential for chromatin organization and function1. Among the genes coding for the MYST family of KATs (KAT5-KAT8) are the oncogenes KAT6A (also known as MOZ) and KAT6B (also known as MORF and QKF)2,3. KAT6A has essential roles in normal haematopoietic stem cells4-6 and is the target of recurrent chromosomal translocations, causing acute myeloid leukaemia7,8. Similarly, chromosomal translocations in KAT6B have been identified in diverse cancers8. KAT6A suppresses cellular senescence through the regulation of suppressors of the CDKN2A locus9,10, a function that requires its KAT activity10. Loss of one allele of KAT6A extends the median survival of mice with MYC-induced lymphoma from 105 to 413 days11. These findings suggest that inhibition of KAT6A and KAT6B may provide a therapeutic benefit in cancer. Here we present highly potent, selective inhibitors of KAT6A and KAT6B, denoted WM-8014 and WM-1119. Biochemical and structural studies demonstrate that these compounds are reversible competitors of acetyl coenzyme A and inhibit MYST-catalysed histone acetylation. WM-8014 and WM-1119 induce cell cycle exit and cellular senescence without causing DNA damage. Senescence is INK4A/ARF-dependent and is accompanied by changes in gene expression that are typical of loss of KAT6A function. WM-8014 potentiates oncogene-induced senescence in vitro and in a zebrafish model of hepatocellular carcinoma. WM-1119, which has increased bioavailability, arrests the progression of lymphoma in mice. We anticipate that this class of inhibitors will help to accelerate the development of therapeutics that target gene transcription regulated by histone acetylation.
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Affiliation(s)
- Jonathan B Baell
- Medicinal Chemistry Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia. .,School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing, China.
| | - David J Leaver
- Medicinal Chemistry Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Stefan J Hermans
- ACRF Rational Drug Discovery Centre, St Vincent's Institute of Medical Research, Fitzroy, Victoria, Australia
| | - Gemma L Kelly
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Margs S Brennan
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Natalie L Downer
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia
| | - Nghi Nguyen
- Medicinal Chemistry Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Johannes Wichmann
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Helen M McRae
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Yuqing Yang
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Ben Cleary
- Medicinal Chemistry Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - H Rachel Lagiakos
- Medicinal Chemistry Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia.,Cancer Therapeutics CRC, Parkville, Victoria, Australia
| | - Stephen Mieruszynski
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Guido Pacini
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia
| | - Hannah K Vanyai
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Maria I Bergamasco
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Rose E May
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia
| | - Bethany K Davey
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Cancer Therapeutics CRC, Parkville, Victoria, Australia
| | - Kimberly J Morgan
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Andrew J Sealey
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Beinan Wang
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia.,School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
| | - Natasha Zamudio
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Stephen Wilcox
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Alexandra L Garnham
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Bilal N Sheikh
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Brandon J Aubrey
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Karen Doggett
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Matthew C Chung
- ACRF Rational Drug Discovery Centre, St Vincent's Institute of Medical Research, Fitzroy, Victoria, Australia
| | - Melanie de Silva
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Cancer Therapeutics CRC, Parkville, Victoria, Australia
| | - John Bentley
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Biomedical Program, Parkville, Victoria, Australia
| | - Pat Pilling
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Biomedical Program, Parkville, Victoria, Australia
| | - Meghan Hattarki
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Biomedical Program, Parkville, Victoria, Australia
| | - Olan Dolezal
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Biomedical Program, Parkville, Victoria, Australia
| | - Matthew L Dennis
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Biomedical Program, Parkville, Victoria, Australia
| | - Hendrik Falk
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia.,Cancer Therapeutics CRC, Parkville, Victoria, Australia
| | - Bin Ren
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Biomedical Program, Parkville, Victoria, Australia
| | - Susan A Charman
- Centre for Drug Candidate Optimisation, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Karen L White
- Centre for Drug Candidate Optimisation, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Jai Rautela
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Andrea Newbold
- The Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - Edwin D Hawkins
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | | | - Nicholas D Huntington
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Thomas S Peat
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Biomedical Program, Parkville, Victoria, Australia
| | - Joan K Heath
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Andreas Strasser
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Michael W Parker
- ACRF Rational Drug Discovery Centre, St Vincent's Institute of Medical Research, Fitzroy, Victoria, Australia.,Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria, Australia
| | - Gordon K Smyth
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Mathematics and Statistics, University of Melbourne, Parkville, Victoria, Australia
| | - Ian P Street
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia.,Cancer Therapeutics CRC, Parkville, Victoria, Australia
| | - Brendon J Monahan
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia.,Cancer Therapeutics CRC, Parkville, Victoria, Australia
| | - Anne K Voss
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia. .,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia.
| | - Tim Thomas
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne, Victoria, Australia. .,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia.
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Molecular Architecture of the Essential Yeast Histone Acetyltransferase Complex NuA4 Redefines Its Multimodularity. Mol Cell Biol 2018; 38:MCB.00570-17. [PMID: 29463645 DOI: 10.1128/mcb.00570-17] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 02/11/2018] [Indexed: 11/20/2022] Open
Abstract
Conserved from yeast to humans, the NuA4 histone acetyltransferase is a large multisubunit complex essential for cell viability through the regulation of gene expression, genome maintenance, metabolism, and cell fate during development and stress. How the different NuA4 subunits work in concert with one another to perform these diverse functions remains unclear, and addressing this central question requires a comprehensive understanding of NuA4's molecular architecture and subunit organization. We have determined the structure of fully assembled native yeast NuA4 by single-particle electron microscopy. Our data revealed that NuA4 adopts a trilobal overall architecture, with each of the three lobes constituted by one or two functional modules. By performing cross-linking coupled to mass spectrometry analysis and in vitro protein interaction studies, we further mapped novel intermolecular interfaces within NuA4. Finally, we combined these new data with other known structural information of NuA4 subunits and subassemblies to construct a multiscale model to illustrate how the different NuA4 subunits and modules are spatially arranged. This model shows that the multiple chromatin reader domains are clustered together around the catalytic core, suggesting that NuA4's multimodular architecture enables it to engage in multivalent interactions with its nucleosome substrate.
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35
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Potts KS, Bowman TV. Modeling Myeloid Malignancies Using Zebrafish. Front Oncol 2017; 7:297. [PMID: 29255698 PMCID: PMC5722844 DOI: 10.3389/fonc.2017.00297] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 11/20/2017] [Indexed: 02/04/2023] Open
Abstract
Human myeloid malignancies represent a substantial disease burden to individuals, with significant morbidity and death. The genetic underpinnings of disease formation and progression remain incompletely understood. Large-scale human population studies have identified a high frequency of potential driver mutations in spliceosomal and epigenetic regulators that contribute to malignancies, such as myelodysplastic syndromes (MDS) and leukemias. The high conservation of cell types and genes between humans and model organisms permits the investigation of the underlying mechanisms of leukemic development and potential therapeutic testing in genetically pliable pre-clinical systems. Due to the many technical advantages, such as large-scale screening, lineage-tracing studies, tumor transplantation, and high-throughput drug screening approaches, zebrafish is emerging as a model system for myeloid malignancies. In this review, we discuss recent advances in MDS and leukemia using the zebrafish model.
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Affiliation(s)
- Kathryn S Potts
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY, United States.,Gottesman Institute for Stem Cell Biology and Regenerative Medicine, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Teresa V Bowman
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY, United States.,Gottesman Institute for Stem Cell Biology and Regenerative Medicine, Albert Einstein College of Medicine, Bronx, NY, United States.,Department of Medicine (Oncology), Albert Einstein College of Medicine, Bronx, NY, United States
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36
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Pardo M, Yu L, Shen S, Tate P, Bode D, Letney BL, Quelle DE, Skarnes W, Choudhary JS. Myst2/Kat7 histone acetyltransferase interaction proteomics reveals tumour-suppressor Niam as a novel binding partner in embryonic stem cells. Sci Rep 2017; 7:8157. [PMID: 28811661 PMCID: PMC5557939 DOI: 10.1038/s41598-017-08456-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 07/10/2017] [Indexed: 12/28/2022] Open
Abstract
MYST histone acetyltransferases have crucial functions in transcription, replication and DNA repair and are hence implicated in development and cancer. Here we characterise Myst2/Kat7/Hbo1 protein interactions in mouse embryonic stem cells by affinity purification coupled to mass spectrometry. This study confirms that in embryonic stem cells Myst2 is part of H3 and H4 histone acetylation complexes similar to those described in somatic cells. We identify a novel Myst2-associated protein, the tumour suppressor protein Niam (Nuclear Interactor of ARF and Mdm2). Human NIAM is involved in chromosome segregation, p53 regulation and cell proliferation in somatic cells, but its role in embryonic stem cells is unknown. We describe the first Niam embryonic stem cell interactome, which includes proteins with roles in DNA replication and repair, transcription, splicing and ribosome biogenesis. Many of Myst2 and Niam binding partners are required for correct embryonic development, implicating Myst2 and Niam in the cooperative regulation of this process and suggesting a novel role for Niam in embryonic biology. The data provides a useful resource for exploring Myst2 and Niam essential cellular functions and should contribute to deeper understanding of organism early development and survival as well as cancer. Data are available via ProteomeXchange with identifier PXD005987.
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Affiliation(s)
- Mercedes Pardo
- Proteomic Mass Spectrometry, Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, CB10 1SA, United Kingdom.
| | - Lu Yu
- Proteomic Mass Spectrometry, Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, CB10 1SA, United Kingdom
| | - Shihpei Shen
- Stem Cell Engineering, Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, CB10 1SA, United Kingdom
- Cold Genesys Inc., Santa Ana, CA, USA
| | - Peri Tate
- Stem Cell Engineering, Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, CB10 1SA, United Kingdom
| | - Daniel Bode
- Proteomic Mass Spectrometry, Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, CB10 1SA, United Kingdom
- Wellcome Trust PhD Program, Cambridge Stem Cell Institute, Cambridge, Cambridgeshire, United Kingdom
| | - Blake L Letney
- Departments of Pharmacology and Pathology, The University of Iowa and Holden Comprehensive Cancer Center, Iowa City, IA, 52242, USA
| | - Dawn E Quelle
- Departments of Pharmacology and Pathology, The University of Iowa and Holden Comprehensive Cancer Center, Iowa City, IA, 52242, USA
| | - William Skarnes
- Stem Cell Engineering, Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, CB10 1SA, United Kingdom
| | - Jyoti S Choudhary
- Proteomic Mass Spectrometry, Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, CB10 1SA, United Kingdom
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37
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The TIP60 Complex Regulates Bivalent Chromatin Recognition by 53BP1 through Direct H4K20me Binding and H2AK15 Acetylation. Mol Cell 2017; 62:409-421. [PMID: 27153538 DOI: 10.1016/j.molcel.2016.03.031] [Citation(s) in RCA: 167] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Revised: 02/20/2016] [Accepted: 03/28/2016] [Indexed: 01/05/2023]
Abstract
The NuA4/TIP60 acetyltransferase complex is a key regulator of genome expression and stability. Here we identified MBTD1 as a stable subunit of the complex, and we reveal that, via a histone reader domain for H4K20me1/2, MBTD1 allows TIP60 to associate with specific gene promoters and to promote the repair of DNA double-strand breaks by homologous recombination. It was previously suggested that TIP60-dependent acetylation of H4 regulates binding of the non-homologous end joining factor 53BP1, which engages chromatin through simultaneous binding of H4K20me2 and H2AK15ub. We find that the TIP60 complex regulates association of 53BP1 partly by competing for H4K20me2 and by regulating H2AK15ub. Ubiquitylation of H2AK15 by RNF168 inhibits chromatin acetylation by TIP60, while this residue can be acetylated by TIP60 in vivo, blocking its ubiquitylation. Altogether, these results uncover an intricate mechanism orchestrated by the TIP60 complex to regulate 53BP1-dependent repair through competitive bivalent binding and modification of chromatin.
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38
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Liu N, Li S, Wu N, Cho KS. Acetylation and deacetylation in cancer stem-like cells. Oncotarget 2017; 8:89315-89325. [PMID: 29179522 PMCID: PMC5687692 DOI: 10.18632/oncotarget.19167] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 06/27/2017] [Indexed: 12/21/2022] Open
Abstract
Cancer stem-like cell (CSC) model has been established to investigate the underlying mechanisms of tumor initiation and progression. The imbalance between acetylation and deacetylation of histone or non-histone proteins, one of the important epigenetic modification processes, is closely associated with a wide variety of diseases including cancer. Acetylation and deacetylation are involved in various stemness-related signal pathways and drive the regulation of self-renewal and differentiation in normal developmental processes. Therefore, it is critical to explore their role in the maintenance of cancer stem-like cell traits. Here, we will review the extensive dysregulations of acetylation found in cancers and summarize their functional roles in sustaining CSC-like properties. Additionally, the use of deacetyltransferase inhibitors as an effective therapeutic strategy against CSCs is also discussed.
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Affiliation(s)
- Na Liu
- Department of Ophthalmology, Southwest Eye Hospital, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Shiqi Li
- Center of biotherapy, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Nan Wu
- Department of Ophthalmology, Southwest Eye Hospital, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Kin-Sang Cho
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, Massachusetts, USA
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39
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YEATS Domain—A Histone Acylation Reader in Health and Disease. J Mol Biol 2017; 429:1994-2002. [DOI: 10.1016/j.jmb.2017.03.010] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 03/03/2017] [Accepted: 03/03/2017] [Indexed: 01/24/2023]
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40
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Sheikh BN, Metcalf D, Voss AK, Thomas T. MOZ and BMI1 act synergistically to maintain hematopoietic stem cells. Exp Hematol 2017; 47:83-97.e8. [DOI: 10.1016/j.exphem.2016.10.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 09/30/2016] [Accepted: 10/11/2016] [Indexed: 11/25/2022]
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MOZ (KAT6A) is essential for the maintenance of classically defined adult hematopoietic stem cells. Blood 2016; 128:2307-2318. [DOI: 10.1182/blood-2015-10-676072] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 09/14/2016] [Indexed: 12/20/2022] Open
Abstract
Key Points
MOZ deletion in adult mice leads to a rapid loss of cells with HSC cell surface immuno-phenotype and transplantation ability. Absence of classically defined HSCs for an extended period does not substantially affect steady-state hematopoiesis.
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Histone acetyltransferase activity of MOF is required for adult but not early fetal hematopoiesis in mice. Blood 2016; 129:48-59. [PMID: 27827827 DOI: 10.1182/blood-2016-05-714568] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 09/16/2016] [Indexed: 12/26/2022] Open
Abstract
K(lysine) acetyltransferase 8 (KAT8, also known as MOF) mediates the acetylation of histone H4 at lysine 16 (H4K16ac) and is crucial for murine embryogenesis. Lysine acetyltransferases have been shown to regulate various stages of normal hematopoiesis. However, the function of MOF in hematopoietic stem cell (HSC) development has not yet been elucidated. We set out to study the role of MOF in general hematopoiesis by using a Vav1-cre-induced conditional murine Mof knockout system and found that MOF is critical for hematopoietic cell maintenance and HSC engraftment capacity in adult hematopoiesis. Rescue experiments with a MOF histone acetyltransferase domain mutant illustrated the requirement for MOF acetyltransferase activity in the clonogenic capacity of HSCs and progenitors. In stark contrast, fetal steady-state hematopoiesis at embryonic day (E) 14.5 was not affected by homozygous Mof deletion despite dramatic loss of global H4K16ac. Hematopoietic defects start manifesting in late gestation at E17.5. The discovery that MOF and its H4K16ac activity are required for adult but not early and midgestational hematopoiesis supports the notion that multiple chromatin regulators may be crucial for hematopoiesis at varying stages of development. MOF is therefore a developmental-stage-specific chromatin regulator found to be essential for adult but not early fetal hematopoiesis.
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Lau AC, Zhu KP, Brouhard EA, Davis MB, Csankovszki G. An H4K16 histone acetyltransferase mediates decondensation of the X chromosome in C. elegans males. Epigenetics Chromatin 2016; 9:44. [PMID: 27777629 PMCID: PMC5070013 DOI: 10.1186/s13072-016-0097-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 10/05/2016] [Indexed: 02/08/2023] Open
Abstract
Background In C. elegans, in order to equalize gene expression between the sexes and balance X and autosomal expression, two steps are believed to be required. First, an unknown mechanism is hypothesized to upregulate the X chromosome in both sexes. This mechanism balances the X to autosomal expression in males, but creates X overexpression in hermaphrodites. Therefore, to restore the balance, hermaphrodites downregulate gene expression twofold on both X chromosomes. While many studies have focused on X chromosome downregulation, the mechanism of X upregulation is not known. Results To gain more insight into X upregulation, we studied the effects of chromatin condensation and histone acetylation on gene expression levels in male C. elegans. We have found that the H4K16 histone acetyltransferase MYS-1/Tip60 mediates dramatic decondensation of the male X chromosome as measured by FISH. However, RNA-seq analysis revealed that MYS-1 contributes only slightly to upregulation of gene expression on the X chromosome. These results suggest that the level of chromosome decondensation does not necessarily correlate with the degree of gene expression change in vivo. Furthermore, the X chromosome is more sensitive to MYS-1-mediated decondensation than the autosomes, despite similar levels of H4K16ac on all chromosomes, as measured by ChIP-seq. H4K16ac levels weakly correlate with gene expression levels on both the X and the autosomes, but highly expressed genes on the X chromosome do not contain exceptionally high levels of H4K16ac. Conclusion These results indicate that H4K16ac and chromosome decondensation influence regulation of the male X chromosome; however, they do not fully account for the high levels of gene expression observed on the X chromosomes. Electronic supplementary material The online version of this article (doi:10.1186/s13072-016-0097-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Alyssa C Lau
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, 830 N. University Ave., Ann Arbor, MI 48109-1048 USA ; Genome Technologies, The Jackson Laboratory for Genomic Medicine, Farmington, CT 06032 USA
| | - Kevin P Zhu
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, 830 N. University Ave., Ann Arbor, MI 48109-1048 USA
| | - Elizabeth A Brouhard
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, 830 N. University Ave., Ann Arbor, MI 48109-1048 USA
| | - Michael B Davis
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, 830 N. University Ave., Ann Arbor, MI 48109-1048 USA
| | - Györgyi Csankovszki
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, 830 N. University Ave., Ann Arbor, MI 48109-1048 USA
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Millan F, Cho MT, Retterer K, Monaghan KG, Bai R, Vitazka P, Everman DB, Smith B, Angle B, Roberts V, Immken L, Nagakura H, DiFazio M, Sherr E, Haverfield E, Friedman B, Telegrafi A, Juusola J, Chung WK, Bale S. Whole exome sequencing reveals de novo pathogenic variants in KAT6A as a cause of a neurodevelopmental disorder. Am J Med Genet A 2016; 170:1791-8. [PMID: 27133397 DOI: 10.1002/ajmg.a.37670] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 04/06/2016] [Indexed: 01/06/2023]
Abstract
Neurodevelopmental disorders (NDD) are common, with 1-3% of general population being affected, but the etiology is unknown in most individuals. Clinical whole-exome sequencing (WES) has proven to be a powerful tool for the identification of pathogenic variants leading to Mendelian disorders, among which NDD represent a significant percentage. Performing WES with a trio-approach has proven to be extremely effective in identifying de novo pathogenic variants as a common cause of NDD. Here we report six unrelated individuals with a common phenotype consisting of NDD with severe speech delay, hypotonia, and facial dysmorphism. These patients underwent WES with a trio approach and de novo heterozygous predicted pathogenic novel variants in the KAT6A gene were identified. The KAT6A gene encodes a histone acetyltransfrease protein and it has long been known for its structural involvement in acute myeloid leukemia; however, it has not previously been associated with any congenital disorder. In animal models the KAT6A ortholog is involved in transcriptional regulation during development. Given the similar findings in animal models and our patient's phenotypes, we hypothesize that KAT6A could play a role in development of the brain, face, and heart in humans. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
| | | | | | | | | | | | | | - Brooke Smith
- Greenwood Genetic Center, Greenville, South Carolina
| | - Brad Angle
- Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois
| | - Victoria Roberts
- Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois
| | | | | | - Marc DiFazio
- Children's Outpatient Center of Montgomery County, Rockville, Maryland
| | - Elliott Sherr
- Institute of Human Genetics, University of California, San Francisco, California
| | | | | | | | | | - Wendy K Chung
- Departments of Pediatrics and Medicine, Columbia University Medical Center, New York, New York
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Widespread colocalization of the Drosophila histone acetyltransferase homolog MYST5 with DREF and insulator proteins at active genes. Chromosoma 2016; 126:165-178. [PMID: 26894919 DOI: 10.1007/s00412-016-0582-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 01/18/2016] [Accepted: 02/10/2016] [Indexed: 12/28/2022]
Abstract
MYST family histone acetyltransferases play important roles in gene regulation. Here, we have characterized the Drosophila MYST histone acetyltransferase (HAT) encoded by cg1894, whose closest homolog is Drosophila MOF, and which we have termed MYST5. We found it localized to a large number of interbands as well as to the telomeres of polytene chromosomes, and it showed strong colocalization with the interband protein Z4/Putzig and RNA polymerase II. Accordingly, genome-wide location analysis by ChIP-seq showed co-occurrence of MYST5 with the Z4-interacting partner Chriz/Chromator. Interestingly, MYST5 bound to the promoter of actively transcribed genes, and about half of MYST5 sites colocalized with the transcription factor DNA replication-related element-binding factor (DREF), indicating a role for MYST5 in gene expression. Moreover, we observed substantial overlap of MYST5 binding with that of the insulator proteins CP190, dCTCF, and BEAF-32, which mediate the organization of the genome into functionally distinct topological domains. Altogether, our data suggest a broad role for MYST5 both in gene-specific transcriptional regulation and in the organization of the genome into chromatin domains, with the two roles possibly being functionally interconnected.
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Stützer A, Liokatis S, Kiesel A, Schwarzer D, Sprangers R, Söding J, Selenko P, Fischle W. Modulations of DNA Contacts by Linker Histones and Post-translational Modifications Determine the Mobility and Modifiability of Nucleosomal H3 Tails. Mol Cell 2016; 61:247-59. [PMID: 26778125 DOI: 10.1016/j.molcel.2015.12.015] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 09/23/2015] [Accepted: 12/03/2015] [Indexed: 10/22/2022]
Abstract
Post-translational histone modifications and linker histone incorporation regulate chromatin structure and genome activity. How these systems interface on a molecular level is unclear. Using biochemistry and NMR spectroscopy, we deduced mechanistic insights into the modification behavior of N-terminal histone H3 tails in different nucleosomal contexts. We find that linker histones generally inhibit modifications of different H3 sites and reduce H3 tail dynamics in nucleosomes. These effects are caused by modulations of electrostatic interactions of H3 tails with linker DNA and largely depend on the C-terminal domains of linker histones. In agreement, linker histone occupancy and H3 tail modifications segregate on a genome-wide level. Charge-modulating modifications such as phosphorylation and acetylation weaken transient H3 tail-linker DNA interactions, increase H3 tail dynamics, and, concomitantly, enhance general modifiability. We propose that alterations of H3 tail-linker DNA interactions by linker histones and charge-modulating modifications execute basal control mechanisms of chromatin function.
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Affiliation(s)
- Alexandra Stützer
- Laboratory of Chromatin Biochemistry, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Stamatios Liokatis
- Department of NMR-Supported Structural Biology, Leibniz Institute of Molecular Pharmacology (FMP Berlin), Robert-Rössle Strasse 10, 13125 Berlin, Germany
| | - Anja Kiesel
- Research Group of Computational Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Dirk Schwarzer
- Department of Chemical Biology, Leibniz Institute of Molecular Pharmacology (FMP Berlin), Robert-Rössle Strasse 10, 13125 Berlin, Germany
| | - Remco Sprangers
- Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany
| | - Johannes Söding
- Research Group of Computational Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany; Gene Center and Center for Integrated Protein Science Munich (CIPSM), Ludwig-Maximilians-Universität München, Feodor-Lynen-Strasse 25, 81377 Munich, Germany
| | - Philipp Selenko
- Department of NMR-Supported Structural Biology, Leibniz Institute of Molecular Pharmacology (FMP Berlin), Robert-Rössle Strasse 10, 13125 Berlin, Germany.
| | - Wolfgang Fischle
- Laboratory of Chromatin Biochemistry, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany.
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Blasi T, Feller C, Feigelman J, Hasenauer J, Imhof A, Theis F, Becker P, Marr C. Combinatorial Histone Acetylation Patterns Are Generated by Motif-Specific Reactions. Cell Syst 2016; 2:49-58. [DOI: 10.1016/j.cels.2016.01.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Revised: 11/18/2015] [Accepted: 01/05/2016] [Indexed: 11/25/2022]
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Nakagawa T, Ikehara T, Doiguchi M, Imamura Y, Higashi M, Yoneda M, Ito T. Enhancer of Acetyltransferase Chameau (EAChm) Is a Novel Transcriptional Co-Activator. PLoS One 2015; 10:e0142305. [PMID: 26555228 PMCID: PMC4640846 DOI: 10.1371/journal.pone.0142305] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 10/19/2015] [Indexed: 11/18/2022] Open
Abstract
Acetylation of nucleosomal histones by diverse histone acetyltransferases (HAT) plays pivotal roles in many cellular events. Discoveries of novel HATs and HAT related factors have provided new insights to understand the roles and mechanisms of histone acetylation. In this study, we identified prominent Histone H3 acetylation activity in vitro and purified its activity, showing that it is composed of the MYST acetyltransferase Chameau and Enhancer of the Acetyltransferase Chameau (EAChm) family. EAChm is a negatively charged acidic protein retaining aspartate and glutamate. Furthermore, we identified that Chameau and EAChm stimulate transcription in vitro together with purified general transcription factors. In addition, RNA-seq analysis of Chameu KD and EAChm KD S2 cells suggest that Chameau and EAChm regulate transcription of common genes in vivo. Our results suggest that EAChm regulates gene transcription in Drosophila embryos by enhancing Acetyltransferase Chameau activity.
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Affiliation(s)
- Takeya Nakagawa
- Department of Biochemistry, Nagasaki University School of Medicine, Nagasaki, 852–8523, Japan
| | - Tsuyoshi Ikehara
- Department of Biochemistry, Nagasaki University School of Medicine, Nagasaki, 852–8523, Japan
| | - Masamichi Doiguchi
- Department of Biochemistry, Nagasaki University School of Medicine, Nagasaki, 852–8523, Japan
| | - Yuko Imamura
- Department of Biochemistry, Nagasaki University School of Medicine, Nagasaki, 852–8523, Japan
| | - Miki Higashi
- Department of Biochemistry, Nagasaki University School of Medicine, Nagasaki, 852–8523, Japan
| | - Mitsuhiro Yoneda
- Department of Biochemistry, Nagasaki University School of Medicine, Nagasaki, 852–8523, Japan
| | - Takashi Ito
- Department of Biochemistry, Nagasaki University School of Medicine, Nagasaki, 852–8523, Japan
- * E-mail:
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Ravens S, Yu C, Ye T, Stierle M, Tora L. Tip60 complex binds to active Pol II promoters and a subset of enhancers and co-regulates the c-Myc network in mouse embryonic stem cells. Epigenetics Chromatin 2015; 8:45. [PMID: 26550034 PMCID: PMC4636812 DOI: 10.1186/s13072-015-0039-z] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 10/29/2015] [Indexed: 01/24/2023] Open
Abstract
Background Tip60 (KAT5) is the histone acetyltransferase (HAT) of the mammalian Tip60/NuA4 complex. While Tip60 is important for early mouse development and mouse embryonic stem cell (mESC) pluripotency, the function of Tip60 as reflected in a genome-wide context is not yet well understood. Results Gel filtration of nuclear mESCs extracts indicate incorporation of Tip60 into large molecular complexes and exclude the existence of large quantities of “free” Tip60 within the nuclei of ESCs. Thus, monitoring of Tip60 binding to the genome should reflect the behaviour of Tip60-containing complexes. The genome-wide mapping of Tip60 binding in mESCs by chromatin immunoprecipitation (ChIP) coupled with high-throughput sequencing (ChIP-seq) shows that the Tip60 complex is present at promoter regions of predominantly active genes that are bound by RNA polymerase II (Pol II) and contain the H3K4me3 histone mark. The coactivator HAT complexes, Tip60- and Mof (KAT8)-containing (NSL and MSL), show a global overlap at promoters, whereas distinct binding profiles at enhancers suggest different regulatory functions of each essential HAT complex. Interestingly, Tip60 enrichment peaks at about 200 bp downstream of the transcription start sites suggesting a function for the Tip60 complexes in addition to histone acetylation. The comparison of genome-wide binding profiles of Tip60 and c-Myc, a somatic cell reprogramming factor that binds predominantly to active genes in mESCs, demonstrate that Tip60 and c-Myc co-bind at 50–60 % of their binding sites. We also show that the Tip60 complex binds to a subset of bivalent developmental genes and defines a set of mESC-specific enhancer as well as super-enhancer regions. Conclusions Our study suggests that the Tip60 complex functions as a global transcriptional co-activator at most active Pol II promoters, co-regulates the ESC-specific c-Myc network, important for ESC self-renewal and cell metabolism and acts at a subset of active distal regulatory elements, or super enhancers, in mESCs. Electronic supplementary material The online version of this article (doi:10.1186/s13072-015-0039-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sarina Ravens
- Cellular Signalling and Nuclear Dynamics Programme, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR 7104, INSERM U964, Université de Strasbourg (UdS), BP 10142, 1 Rue Laurent Fries, CU de Strasbourg, 67404 Illkirch Cedex, France
| | - Changwei Yu
- Cellular Signalling and Nuclear Dynamics Programme, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR 7104, INSERM U964, Université de Strasbourg (UdS), BP 10142, 1 Rue Laurent Fries, CU de Strasbourg, 67404 Illkirch Cedex, France
| | - Tao Ye
- Microarrays and Deep Sequencing Platform, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR 7104, INSERM U964, UdS, BP 10142, CU de Strasbourg, 67404 Illkirch Cedex, France
| | - Matthieu Stierle
- Cellular Signalling and Nuclear Dynamics Programme, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR 7104, INSERM U964, Université de Strasbourg (UdS), BP 10142, 1 Rue Laurent Fries, CU de Strasbourg, 67404 Illkirch Cedex, France
| | - Laszlo Tora
- Cellular Signalling and Nuclear Dynamics Programme, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR 7104, INSERM U964, Université de Strasbourg (UdS), BP 10142, 1 Rue Laurent Fries, CU de Strasbourg, 67404 Illkirch Cedex, France
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MOF maintains transcriptional programs regulating cellular stress response. Oncogene 2015; 35:2698-710. [PMID: 26387537 PMCID: PMC4893634 DOI: 10.1038/onc.2015.335] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Revised: 07/09/2015] [Accepted: 08/04/2015] [Indexed: 12/14/2022]
Abstract
MOF (MYST1, KAT8) is the major H4K16 lysine acetyltransferase (KAT) in Drosophila and mammals and is essential for embryonic development. However, little is known regarding the role of MOF in specific cell lineages. Here we analyze the differential role of MOF in proliferating and terminally differentiated tissues at steady state and under stress conditions. In proliferating cells, MOF directly binds and maintains the expression of genes required for cell cycle progression. In contrast, MOF is dispensable for terminally differentiated, postmitotic glomerular podocytes under physiological conditions. However, in response to injury, MOF is absolutely critical for podocyte maintenance in vivo. Consistently, we detect defective nuclear, endoplasmic reticulum and Golgi structures, as well as presence of multivesicular bodies in vivo in podocytes lacking Mof following injury. Undertaking genome-wide expression analysis of podocytes, we uncover several MOF-regulated pathways required for stress response. We find that MOF, along with the members of the non-specific lethal but not the male-specific lethal complex, directly binds to genes encoding the lysosome, endocytosis and vacuole pathways, which are known regulators of podocyte maintenance. Thus, our work identifies MOF as a key regulator of cellular stress response in glomerular podocytes.
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