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Meng H, Huan Y, Zhang K, Yi X, Meng X, Kang E, Wu S, Deng W, Wang Y. Quiescent Adult Neural Stem Cells: Developmental Origin and Regulatory Mechanisms. Neurosci Bull 2024; 40:1353-1363. [PMID: 38656419 PMCID: PMC11365920 DOI: 10.1007/s12264-024-01206-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 01/02/2024] [Indexed: 04/26/2024] Open
Abstract
The existence of neural stem cells (NSCs) in the adult mammalian nervous system, although small in number and restricted to the sub-ventricular zone of the lateral ventricles, the dentate gyrus of the hippocampus, and the olfactory epithelium, is a gift of evolution for the adaptive brain function which requires persistent plastic changes of these regions. It is known that most adult NSCs are latent, showing long cell cycles. In the past decade, the concept of quiescent NSCs (qNSCs) has been widely accepted by researchers in the field, and great progress has been made in the biology of qNSCs. Although the spontaneous neuronal regeneration derived from adult NSCs is not significant, understanding how the behaviors of qNSCs are regulated sheds light on stimulating endogenous NSC-based neuronal regeneration. In this review, we mainly focus on the recent progress of the developmental origin and regulatory mechanisms that maintain qNSCs under normal conditions, and that mobilize qNSCs under pathological conditions, hoping to give some insights for future study.
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Affiliation(s)
- Han Meng
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, Xi'an, 710032, China
| | - Yu Huan
- Department of Neurosurgery, General Hospital of Northern Theater Command, Shenyang, 110016, China
| | - Kun Zhang
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, Xi'an, 710032, China
| | - Xuyang Yi
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, Xi'an, 710032, China
| | - Xinyu Meng
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, Xi'an, 710032, China
- School of Life Science and Research Center for Natural Peptide Drugs, Shaanxi Engineering and Technological Research Center for Conversation and Utilization of Regional Biological Resources, Yanan University, Yan'an, 716000, China
| | - Enming Kang
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, Xi'an, 710032, China
| | - Shengxi Wu
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, Xi'an, 710032, China.
| | - Wenbing Deng
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 510631, China.
| | - Yazhou Wang
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, Xi'an, 710032, China.
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Lin KY, Gujar MR, Lin J, Ding WY, Huang J, Gao Y, Tan YS, Teng X, Christine LSL, Kanchanawong P, Toyama Y, Wang H. Astrocytes control quiescent NSC reactivation via GPCR signaling-mediated F-actin remodeling. SCIENCE ADVANCES 2024; 10:eadl4694. [PMID: 39047090 PMCID: PMC11268418 DOI: 10.1126/sciadv.adl4694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Accepted: 06/18/2024] [Indexed: 07/27/2024]
Abstract
The transitioning of neural stem cells (NSCs) between quiescent and proliferative states is fundamental for brain development and homeostasis. Defects in NSC reactivation are associated with neurodevelopmental disorders. Drosophila quiescent NSCs extend an actin-rich primary protrusion toward the neuropil. However, the function of the actin cytoskeleton during NSC reactivation is unknown. Here, we reveal the fine filamentous actin (F-actin) structures in the protrusions of quiescent NSCs by expansion and super-resolution microscopy. We show that F-actin polymerization promotes the nuclear translocation of myocardin-related transcription factor, a microcephaly-associated transcription factor, for NSC reactivation and brain development. F-actin polymerization is regulated by a signaling cascade composed of G protein-coupled receptor Smog, G protein αq subunit, Rho1 guanosine triphosphatase, and Diaphanous (Dia)/Formin during NSC reactivation. Further, astrocytes secrete a Smog ligand folded gastrulation to regulate Gαq-Rho1-Dia-mediated NSC reactivation. Together, we establish that the Smog-Gαq-Rho1 signaling axis derived from astrocytes, an NSC niche, regulates Dia-mediated F-actin dynamics in NSC reactivation.
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Affiliation(s)
- Kun-Yang Lin
- Neuroscience and Behavioral Disorders Programme, Duke-NUS Medical School, 8 College Road, Singapore 169857, Singapore
| | - Mahekta R. Gujar
- Neuroscience and Behavioral Disorders Programme, Duke-NUS Medical School, 8 College Road, Singapore 169857, Singapore
| | - Jiaen Lin
- Neuroscience and Behavioral Disorders Programme, Duke-NUS Medical School, 8 College Road, Singapore 169857, Singapore
| | - Wei Yung Ding
- Neuroscience and Behavioral Disorders Programme, Duke-NUS Medical School, 8 College Road, Singapore 169857, Singapore
| | - Jiawen Huang
- Neuroscience and Behavioral Disorders Programme, Duke-NUS Medical School, 8 College Road, Singapore 169857, Singapore
| | - Yang Gao
- Neuroscience and Behavioral Disorders Programme, Duke-NUS Medical School, 8 College Road, Singapore 169857, Singapore
| | - Ye Sing Tan
- Neuroscience and Behavioral Disorders Programme, Duke-NUS Medical School, 8 College Road, Singapore 169857, Singapore
| | - Xiang Teng
- Mechanobiology Institute, Level 5, T-lab Building, 5A Engineering Drive 1, Singapore, 117411, Singapore
| | - Low Siok Lan Christine
- Mechanobiology Institute, Level 5, T-lab Building, 5A Engineering Drive 1, Singapore, 117411, Singapore
| | - Pakorn Kanchanawong
- Mechanobiology Institute, Level 5, T-lab Building, 5A Engineering Drive 1, Singapore, 117411, Singapore
| | - Yusuke Toyama
- Mechanobiology Institute, Level 5, T-lab Building, 5A Engineering Drive 1, Singapore, 117411, Singapore
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore, 117543, Singapore
| | - Hongyan Wang
- Neuroscience and Behavioral Disorders Programme, Duke-NUS Medical School, 8 College Road, Singapore 169857, Singapore
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
- Integrative Sciences and Engineering Programme, National University of Singapore, 28 Medical Drive, Singapore 117456, Singapore
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Crain AT, Butler MB, Hill CA, Huynh M, McGinty RK, Duronio RJ. Drosophila melanogaster Set8 and L(3)mbt function in gene expression independently of histone H4 lysine 20 methylation. Genes Dev 2024; 38:455-472. [PMID: 38866557 PMCID: PMC11216177 DOI: 10.1101/gad.351698.124] [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: 03/12/2024] [Accepted: 05/29/2024] [Indexed: 06/14/2024]
Abstract
Monomethylation of lysine 20 of histone H4 (H4K20me1) is catalyzed by Set8 and thought to play important roles in many aspects of genome function that are mediated by H4K20me binding proteins. We interrogated this model in a developing animal by comparing in parallel the transcriptomes of Set8 null , H4 K20R/A , and l(3)mbt mutant Drosophila melanogaster We found that the gene expression profiles of H4 K20A and H4 K20R larvae are markedly different than Set8 null larvae despite similar reductions in H4K20me1. Set8 null mutant cells have a severely disrupted transcriptome and fail to proliferate in vivo, but these phenotypes are not recapitulated by mutation of H4 K20 , indicating that the developmental defects of Set8 null animals are largely due to H4K20me1-independent effects on gene expression. Furthermore, the H4K20me1 binding protein L(3)mbt is recruited to the transcription start sites of most genes independently of H4K20me even though genes bound by L(3)mbt have high levels of H4K20me1. Moreover, both Set8 and L(3)mbt bind to purified H4K20R nucleosomes in vitro. We conclude that gene expression changes in Set8 null and H4 K20 mutants cannot be explained by loss of H4K20me1 or L(3)mbt binding to chromatin and therefore that H4K20me1 does not play a large role in gene expression.
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Affiliation(s)
- Aaron T Crain
- Curriculum in Genetics and Molecular Biology, University of North Carolina, Chapel Hill, North Carolina 27599 USA
- Integrative Program for Biological and Genome Sciences, University of North Carolina, Chapel Hill, North Carolina 27599 USA
| | - Megan B Butler
- Department of Biology, University of North Carolina, Chapel Hill, North Carolina 27599 USA
| | - Christina A Hill
- Integrative Program for Biological and Genome Sciences, University of North Carolina, Chapel Hill, North Carolina 27599 USA
| | - Mai Huynh
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina 27599 USA
- Division of Chemical Biology and Medicinal Chemistry, Center for Integrative Chemical Biology and Drug Discovery, University of North Carolina Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina 27599 USA
| | - Robert K McGinty
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina 27599 USA
- Division of Chemical Biology and Medicinal Chemistry, Center for Integrative Chemical Biology and Drug Discovery, University of North Carolina Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina 27599 USA
- Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, North Carolina 27599 USA
| | - Robert J Duronio
- Curriculum in Genetics and Molecular Biology, University of North Carolina, Chapel Hill, North Carolina 27599 USA;
- Integrative Program for Biological and Genome Sciences, University of North Carolina, Chapel Hill, North Carolina 27599 USA
- Department of Biology, University of North Carolina, Chapel Hill, North Carolina 27599 USA
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina 27599 USA
- Department of Genetics, University of North Carolina, Chapel Hill, North Carolina 27599 USA
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Li J, Song H, Chen T, Zhang S, Zhang C, Ma C, Zhang L, Wang T, Qian Y, Deng X. Lysine Methyltransferase 5A Promotes the Progression of Growth Hormone Pituitary Neuroendocrine Tumors through the Wnt/β-Catenin Signaling Pathway. Neuroendocrinology 2024; 114:589-601. [PMID: 38565081 PMCID: PMC11152009 DOI: 10.1159/000538560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 03/25/2024] [Indexed: 04/04/2024]
Abstract
INTRODUCTION Growth hormone (GH) secreting pituitary adenoma is considered one of the most harmful types of Pituitary Neuroendocrine Tumors (PitNETs). Our previous research has found that high expression of Lysine methyltransferase 5A (KMT5A) is closely related to the proliferation of PitNETs. The aim of this study was to investigate the role and molecular mechanism of KMT5A in the progression of GH PitNETs. METHODS Immunohistochemistry, qRT-PCR, and Western blot (WB) were used to assess the expression levels of KMT5A in human normal pituitary and GH PitNETs, as well as in rat normal pituitary and GH3 cells. Additionally, we utilized RNA interference technology and treatment with a selective KMT5A inhibitor to decrease the expression of KMT5A in GH3 cells. CCK-8, EdU, flow cytometry (FCM), clone formation, and WB assay were further employed to evaluate the impact of KMT5A on the proliferation of GH3 cells in vitro. A xenograft model was established to evaluate the role of KMT5A in GH PitNETs progression in vivo. RESULTS KMT5A was highly expressed in GH PitNETs and GH3 cells. Moreover, the reduction of KMT5A expression led to inhibited growth of GH PitNETs and increased apoptosis of tumor cells, as indicated by the findings from CCK-8, EdU, clone formation, and FCM assays. Additionally, WB analysis identified the Wnt/β-catenin signaling pathway as a potential mechanism through which KMT5A promotes GH PitNETs progression. CONCLUSION Our research suggests that KMT5A may facilitate the progression of GH PitNETs via the Wnt/β-catenin signaling pathway. Therefore, KMT5A may serve as a potential therapeutic target and molecular biomarker for GH PitNETs.
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Affiliation(s)
- Junjun Li
- Department of Neurosurgery, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Hao Song
- Department of Neurosurgery, The First Affiliated Hospital of Kunming Medical University, Kunming, China
- Guangyuan Central Hospital, Guangyuan, China
| | - Ting Chen
- Department of Neurosurgery, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Sixi Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Chao Zhang
- Xiangyang First People’s Hospital, Xiangyang, China
| | - Chen Ma
- Department of Neurosurgery, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Lingye Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Tengfei Wang
- Department of Neurosurgery, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Yuan Qian
- The Clinical Medical Research Center for Obstetrics and Gynecology (Yunnan Joint Key Laboratory), Kunming City of Maternal and Child Health Hospital, Kunming City of Women and Children Hospital, Kunming, China
| | - Xingli Deng
- Department of Neurosurgery, The First Affiliated Hospital of Kunming Medical University, Kunming, China
- Puer People’s Hospital, Puer, China
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Blanc RS, Shah N, Salama NAS, Meng FW, Mousaei A, Yang BA, Aguilar CA, Chakkalakal JV, Onukwufor JO, Murphy PJ, Calvi L, Dirksen R. Epigenetic erosion of H4K20me1 induced by inflammation drives aged stem cell ferroptosis. RESEARCH SQUARE 2024:rs.3.rs-3937628. [PMID: 38410478 PMCID: PMC10896381 DOI: 10.21203/rs.3.rs-3937628/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Aging is associated with a decline in stem cell functionality and number across the organism. In this study, we aimed to further unravel Muscle Stem Cells (MuSCs) aging by assessing how systemic factors influence MuSC fate decisions through long-term epigenetic landscape remodelling. As aging is intricately linked to a pro-inflammatory shift, we studied the epigenetic effects of inflammatory signals in MuSCs and measured decreased H4K20me1 levels. This loss disrupts MuSC quiescence, largely through epigenetic silencing of Notch target genes. In the setting of inflammatory signals or aging, the lack of Kmt5a and the subsequent absence of de novoH4K20me1 culminate in cell death by ferroptosis. Aged MuSCs manifest abnormal iron metabolism and reduced Gpx4 levels, resulting in the accumulation of intracellular iron, increased reactive oxygen species, genomic instability, and lipid peroxidation. We showed that ferroptosis is the predominant mode of cell death in aged MuSCs, with remarkably high levels of lipid peroxidation; a phenomenon we also observed in aged hematopoietic stem cells. Implementing preventative strategies to inhibit systemic inflammation prevented aged MuSC ferroptosis, preserving their numbers and regenerative capabilities. This intervention significantly enhanced aged muscle regeneration and strength recovery and extended both lifespan and healthspan in mice. This study delineates a previously underappreciated fate trajectory for stem cell aging, and offers meaningful insights into the treatment of age-related disorders.
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Crain AT, Butler MB, Hill CA, Huynh M, McGinty RK, Duronio RJ. Drosophila melanogaster Set8 and L(3)mbt function in gene expression independently of histone H4 lysine 20 methylation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.12.584710. [PMID: 38559189 PMCID: PMC10980064 DOI: 10.1101/2024.03.12.584710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Mono-methylation of Lysine 20 of histone H4 (H4K20me1) is catalyzed by Set8 and thought to play important roles in many aspects of genome function that are mediated by H4K20me-binding proteins. We interrogated this model in a developing animal by comparing in parallel the transcriptomes of Set8 null , H4 K20R/A , and l(3)mbt mutant Drosophila melanogaster . We found that the gene expression profiles of H4 K20A and H4 K20R larvae are markedly different than Set8 null larvae despite similar reductions in H4K20me1. Set8 null mutant cells have a severely disrupted transcriptome and fail to proliferate in vivo , but these phenotypes are not recapitulated by mutation of H4 K20 indicating that the developmental defects of Set8 null animals are largely due to H4K20me1-independent effects on gene expression. Further, the H4K20me1 binding protein L(3)mbt is recruited to the transcription start sites of most genes independently of H4K20me even though genes bound by L(3)mbt have high levels of H4K20me1. Moreover, both Set8 and L(3)mbt bind to purified H4K20R nucleosomes in vitro. We conclude that gene expression changes in Set8 null and H4 K20 mutants cannot be explained by loss of H4K20me1 or L(3)mbt binding to chromatin, and therefore that H4K20me1 does not play a large role in gene expression.
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Lin KY, Gujar MR, Lin J, Ding WY, Huang J, Gao Y, Tan YS, Teng X, Christine LSL, Kanchanawong P, Toyama Y, Wang H. Astrocytes control quiescent NSC reactivation via GPCR signaling-mediated F-actin remodeling. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.11.584337. [PMID: 38903085 PMCID: PMC11188063 DOI: 10.1101/2024.03.11.584337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
The transitioning of neural stem cells (NSCs) between quiescent and proliferative states is fundamental for brain development and homeostasis. Defects in NSC reactivation are associated with neurodevelopmental disorders. Drosophila quiescent NSCs extend an actin-rich primary protrusion toward the neuropil. However, the function of the actin cytoskeleton during NSC reactivation is unknown. Here, we reveal the fine F-actin structures in the protrusions of quiescent NSCs by expansion and super-resolution microscopy. We show that F-actin polymerization promotes the nuclear translocation of Mrtf, a microcephaly-associated transcription factor, for NSC reactivation and brain development. F-actin polymerization is regulated by a signaling cascade composed of G-protein-coupled receptor (GPCR) Smog, G-protein αq subunit, Rho1 GTPase, and Diaphanous (Dia)/Formin during NSC reactivation. Further, astrocytes secrete a Smog ligand Fog to regulate Gαq-Rho1-Dia-mediated NSC reactivation. Together, we establish that the Smog-Gαq-Rho1 signaling axis derived from astrocytes, a NSC niche, regulates Dia-mediated F-actin dynamics in NSC reactivation.
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8
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Yamazoe K, Inoue YH. Cyclin B Export to the Cytoplasm via the Nup62 Subcomplex and Subsequent Rapid Nuclear Import Are Required for the Initiation of Drosophila Male Meiosis. Cells 2023; 12:2611. [PMID: 37998346 PMCID: PMC10670764 DOI: 10.3390/cells12222611] [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: 10/11/2023] [Revised: 11/06/2023] [Accepted: 11/09/2023] [Indexed: 11/25/2023] Open
Abstract
The cyclin-dependent kinase 1 (Cdk1)-cyclin B (CycB) complex plays critical roles in cell-cycle regulation. Before Drosophila male meiosis, CycB is exported from the nucleus to the cytoplasm via the nuclear porin 62kD (Nup62) subcomplex of the nuclear pore complex. When this export is inhibited, Cdk1 is not activated, and meiosis does not initiate. We investigated the mechanism that controls the cellular localization and activation of Cdk1. Cdk1-CycB continuously shuttled into and out of the nucleus before meiosis. Overexpression of CycB, but not that of CycB with nuclear localization signal sequences, rescued reduced cytoplasmic CycB and inhibition of meiosis in Nup62-silenced cells. Full-scale Cdk1 activation occurred in the nucleus shortly after its rapid nuclear entry. Cdk1-dependent centrosome separation did not occur in Nup62-silenced cells, whereas Cdk1 interacted with Cdk-activating kinase and Twine/Cdc25C in the nuclei of Nup62-silenced cells, suggesting the involvement of another suppression mechanism. Silencing of roughex rescued Cdk1 inhibition and initiated meiosis. Nuclear export of Cdk1 ensured its escape from inhibition by a cyclin-dependent kinase inhibitor. The complex re-entered the nucleus via importin β at the onset of meiosis. We propose a model regarding the dynamics and activation mechanism of Cdk1-CycB to initiate male meiosis.
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Affiliation(s)
| | - Yoshihiro H. Inoue
- Biomedical Research Center, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo, Kyoto 606-0962, Japan;
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Angerilli A, Tait J, Berges J, Shcherbakova I, Pokrovsky D, Schauer T, Smialowski P, Hsam O, Mentele E, Nicetto D, Rupp RA. The histone H4K20 methyltransferase SUV4-20H1/KMT5B is required for multiciliated cell differentiation in Xenopus. Life Sci Alliance 2023; 6:e202302023. [PMID: 37116939 PMCID: PMC10147948 DOI: 10.26508/lsa.202302023] [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: 03/06/2023] [Revised: 04/18/2023] [Accepted: 04/18/2023] [Indexed: 04/30/2023] Open
Abstract
H4 lysine 20 dimethylation (H4K20me2) is the most abundant histone modification in vertebrate chromatin. It arises from sequential methylation of unmodified histone H4 proteins by the mono-methylating enzyme PR-SET7/KMT5A, followed by conversion to the dimethylated state by SUV4-20H (KMT5B/C) enzymes. We have blocked the deposition of this mark by depleting Xenopus embryos of SUV4-20H1/H2 methyltransferases. In the larval epidermis, this results in a severe loss of cilia in multiciliated cells (MCC), a key component of mucociliary epithelia. MCC precursor cells are correctly specified, amplify centrioles, but ultimately fail in ciliogenesis because of the perturbation of cytoplasmic processes. Genome-wide transcriptome profiling reveals that SUV4-20H1/H2-depleted ectodermal explants preferentially down-regulate the expression of several hundred ciliogenic genes. Further analysis demonstrated that knockdown of SUV4-20H1 alone is sufficient to generate the MCC phenotype and that its catalytic activity is needed for axoneme formation. Overexpression of the H4K20me1-specific histone demethylase PHF8/KDM7B also rescues the ciliogenic defect in a significant manner. Taken together, this indicates that the conversion of H4K20me1 to H4K20me2 by SUV4-20H1 is critical for the formation of cilia tufts.
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Affiliation(s)
- Alessandro Angerilli
- Department of Molecular Biology, Biomedical Center, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
| | - Janet Tait
- Department of Molecular Biology, Biomedical Center, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
| | - Julian Berges
- Department of Molecular Biology, Biomedical Center, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
- Sektion Pädiatrische Pneumologie und Allergologie und Mukoviszidose-Zentrum, Universitäts-Klinikum Heidelberg, Heidelberg, Germany
| | - Irina Shcherbakova
- Department of Molecular Biology, Biomedical Center, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
| | - Daniil Pokrovsky
- Department of Molecular Biology, Biomedical Center, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
| | - Tamas Schauer
- Department of Molecular Biology, Biomedical Center, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
| | - Pawel Smialowski
- Institute for Stem Cell Research, Helmholtz Centre Munich, Neuherberg, Germany
- Department of Physiological Genomics, Biomedical Center, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
| | - Ohnmar Hsam
- Department of Molecular Biology, Biomedical Center, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
- Klinik und Poliklinik für Neurologie der Universität Regensburg, Regensburg, Germany
| | - Edith Mentele
- Department of Molecular Biology, Biomedical Center, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
| | - Dario Nicetto
- Department of Molecular Biology, Biomedical Center, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
- Ambys Medicines, South San Francisco, CA, USA
| | - Ralph Aw Rupp
- Department of Molecular Biology, Biomedical Center, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
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10
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Gungi A, Saha S, Pal M, Galande S. H4K20me1 plays a dual role in transcriptional regulation of regeneration and axis patterning in Hydra. Life Sci Alliance 2023; 6:e202201619. [PMID: 36944423 PMCID: PMC10031314 DOI: 10.26508/lsa.202201619] [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: 07/20/2022] [Revised: 02/27/2023] [Accepted: 02/28/2023] [Indexed: 03/23/2023] Open
Abstract
The evolution of the first body axis in the animal kingdom and its extensive ability to regenerate makes Hydra, a Cnidarian, an excellent model system for understanding the underlying epigenetic mechanisms. We identify that monomethyltransferase SETD8 is critical for regeneration in Hydra because of its conserved interaction with β-catenin to fine-tune the associated gene regulatory network. Inhibition of SETD8 activity abolishes head and foot regeneration in Hydra Furthermore, we show that H4K20me1, the histone mark imparted by SETD8, colocalizes with the transcriptional activation machinery locally at the β-catenin-bound TCF/LEF-binding sites on the promoters of head-associated genes, marking an epigenetic activation mode. In contrast, genome-wide analysis of the H4K20me1 occupancy revealed a negative correlation with transcriptional activation. We propose that H4K20me1 acts as a general repressive histone mark in Cnidaria and describe its dichotomous role in transcriptional regulation in Hydra.
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Affiliation(s)
- Akhila Gungi
- Laboratory of Chromatin Biology and Epigenetics, Department of Biology, Indian Institute of Science Education and Research, Pune, India
| | - Shagnik Saha
- Centre of Excellence in Epigenetics, Department of Life Sciences, Shiv Nadar University, Delhi-NCR, India
| | - Mrinmoy Pal
- Laboratory of Chromatin Biology and Epigenetics, Department of Biology, Indian Institute of Science Education and Research, Pune, India
| | - Sanjeev Galande
- Laboratory of Chromatin Biology and Epigenetics, Department of Biology, Indian Institute of Science Education and Research, Pune, India
- Centre of Excellence in Epigenetics, Department of Life Sciences, Shiv Nadar University, Delhi-NCR, India
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11
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Zhang Q, Liu J, Chen L, Zhang M. Promoting Endogenous Neurogenesis as a Treatment for Alzheimer's Disease. Mol Neurobiol 2023; 60:1353-1368. [PMID: 36445633 DOI: 10.1007/s12035-022-03145-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 11/19/2022] [Indexed: 11/30/2022]
Abstract
Alzheimer's disease (AD) is the most universal neurodegenerative disorder characterized by memory loss and cognitive impairment. AD is biologically defined by production and aggregation of misfolded protein including extracellular amyloid β (Aβ) peptide and intracellular microtubule-associated protein tau tangles in neurons, leading to irreversible neuronal loss. At present, regulation of endogenous neurogenesis to supplement lost neurons has been proposed as a promising strategy for treatment of AD. However, the exact underlying mechanisms of impaired neurogenesis in AD have not been fully explained and effective treatments targeting neurogenesis for AD are limited. In this review, we mainly focus on the latest research of impaired neurogenesis in AD. Then we discuss the factors affecting stages of neurogenesis and the interplay between neural stem cells (NSCs) and neurogenic niche under AD pathological conditions. This review aims to explore potential therapeutic strategies that promote endogenous neurogenesis for AD treatments.
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Affiliation(s)
- Qiang Zhang
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin Province, China
| | - Jingyue Liu
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin Province, China
| | - Li Chen
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin Province, China. .,School of Nursing, Jilin University, Changchun, China.
| | - Ming Zhang
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin Province, China.
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12
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Crain AT, Klusza S, Armstrong RL, Santa Rosa P, Temple BRS, Strahl BD, McKay DJ, Matera AG, Duronio RJ. Distinct developmental phenotypes result from mutation of Set8/KMT5A and histone H4 lysine 20 in Drosophila melanogaster. Genetics 2022; 221:iyac054. [PMID: 35404465 PMCID: PMC9157153 DOI: 10.1093/genetics/iyac054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 03/28/2022] [Indexed: 01/27/2023] Open
Abstract
Mono-methylation of histone H4 lysine 20 (H4K20me1) is catalyzed by Set8/KMT5A and regulates numerous aspects of genome organization and function. Loss-of-function mutations in Drosophila melanogaster Set8 or mammalian KMT5A prevent H4K20me1 and disrupt development. Set8/KMT5A also has non-histone substrates, making it difficult to determine which developmental functions of Set8/KMT5A are attributable to H4K20me1 and which to other substrates or to non-catalytic roles. Here, we show that human KMT5A can functionally substitute for Set8 during Drosophila development and that the catalytic SET domains of the two enzymes are fully interchangeable. We also uncovered a role in eye development for the N-terminal domain of Set8 that cannot be complemented by human KMT5A. Whereas Set820/20 null mutants are inviable, we found that an R634G mutation in Set8 predicted from in vitro experiments to ablate catalytic activity resulted in viable adults. Additionally, Set8(R634G) mutants retain significant, albeit reduced, H4K20me1, indicating that the R634G mutation does not eliminate catalytic activity in vivo and is functionally hypomorphic rather than null. Flies engineered to express only unmodifiable H4 histones (H4K20A) can also complete development, but are phenotypically distinct from H4K20R, Set820/20 null, and Set8R634G mutants. Taken together, our results demonstrate functional conservation of KMT5A and Set8 enzymes, as well as distinct roles for Set8 and H4K20me1 in Drosophila development.
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Affiliation(s)
- Aaron T Crain
- Curriculum in Genetics and Molecular Biology, University of North Carolina, Chapel Hill, NC, 27599 USA
- Integrative Program for Biological and Genome Sciences, University of North Carolina, Chapel Hill, NC, 27599 USA
| | - Stephen Klusza
- Integrative Program for Biological and Genome Sciences, University of North Carolina, Chapel Hill, NC, 27599 USA
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, 27599 USA
| | - Robin L Armstrong
- Curriculum in Genetics and Molecular Biology, University of North Carolina, Chapel Hill, NC, 27599 USA
- Integrative Program for Biological and Genome Sciences, University of North Carolina, Chapel Hill, NC, 27599 USA
| | | | - Brenda R S Temple
- Integrative Program for Biological and Genome Sciences, University of North Carolina, Chapel Hill, NC, 27599 USA
- Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC, 27599 USA
| | - Brian D Strahl
- Curriculum in Genetics and Molecular Biology, University of North Carolina, Chapel Hill, NC, 27599 USA
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, 27599 USA
- Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC, 27599 USA
| | - Daniel J McKay
- Curriculum in Genetics and Molecular Biology, University of North Carolina, Chapel Hill, NC, 27599 USA
- Integrative Program for Biological and Genome Sciences, University of North Carolina, Chapel Hill, NC, 27599 USA
- Department of Biology, University of North Carolina, Chapel Hill, NC, 27599 USA
- Department of Genetics, University of North Carolina, Chapel Hill, NC, 27599 USA
| | - A Gregory Matera
- Curriculum in Genetics and Molecular Biology, University of North Carolina, Chapel Hill, NC, 27599 USA
- Integrative Program for Biological and Genome Sciences, University of North Carolina, Chapel Hill, NC, 27599 USA
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, 27599 USA
- Department of Biology, University of North Carolina, Chapel Hill, NC, 27599 USA
- Department of Genetics, University of North Carolina, Chapel Hill, NC, 27599 USA
| | - Robert J Duronio
- Curriculum in Genetics and Molecular Biology, University of North Carolina, Chapel Hill, NC, 27599 USA
- Integrative Program for Biological and Genome Sciences, University of North Carolina, Chapel Hill, NC, 27599 USA
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, 27599 USA
- Department of Biology, University of North Carolina, Chapel Hill, NC, 27599 USA
- Department of Genetics, University of North Carolina, Chapel Hill, NC, 27599 USA
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13
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Gujar MR, Wang H. A fly's eye view of quiescent neural stem cells. OXFORD OPEN NEUROSCIENCE 2022; 1:kvac001. [PMID: 38596705 PMCID: PMC10913722 DOI: 10.1093/oons/kvac001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/18/2022] [Accepted: 01/19/2022] [Indexed: 04/11/2024]
Abstract
The balance between proliferation and quiescence of stem cells is crucial in maintaining tissue homeostasis. Neural stem cells (NSCs) in the brain have the ability to be reactivated from a reversible quiescent state to generate new neurons. However, how NSCs transit between quiescence and reactivation remains largely elusive. Drosophila larval brain NSCs, also known as neuroblasts, have emerged as an excellent in vivo model to study molecular mechanisms underlying NSC quiescence and reactivation. Here, we discuss our current understanding of the molecular mechanisms underlying the reactivation of quiescent NSCs in Drosophila. We review the most recent advances on epigenetic regulations and microtubule cytoskeleton in Drosophila quiescent NSCs and their cross-talk with signaling pathways that are required in regulating NSC reactivation.
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Affiliation(s)
- Mahekta R Gujar
- Neuroscience & Behavioral Disorders Programme, Duke-NUS Medical School, 8 College Road, 169857, Singapore
| | - Hongyan Wang
- Neuroscience & Behavioral Disorders Programme, Duke-NUS Medical School, 8 College Road, 169857, Singapore
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 117597, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, 28 Medical Drive, 117456, Singapore
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14
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Bonitto K, Sarathy K, Atai K, Mitra M, Coller HA. Is There a Histone Code for Cellular Quiescence? Front Cell Dev Biol 2021; 9:739780. [PMID: 34778253 PMCID: PMC8586460 DOI: 10.3389/fcell.2021.739780] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 09/17/2021] [Indexed: 12/14/2022] Open
Abstract
Many of the cells in our bodies are quiescent, that is, temporarily not dividing. Under certain physiological conditions such as during tissue repair and maintenance, quiescent cells receive the appropriate stimulus and are induced to enter the cell cycle. The ability of cells to successfully transition into and out of a quiescent state is crucial for many biological processes including wound healing, stem cell maintenance, and immunological responses. Across species and tissues, transcriptional, epigenetic, and chromosomal changes associated with the transition between proliferation and quiescence have been analyzed, and some consistent changes associated with quiescence have been identified. Histone modifications have been shown to play a role in chromatin packing and accessibility, nucleosome mobility, gene expression, and chromosome arrangement. In this review, we critically evaluate the role of different histone marks in these processes during quiescence entry and exit. We consider different model systems for quiescence, each of the most frequently monitored candidate histone marks, and the role of their writers, erasers and readers. We highlight data that support these marks contributing to the changes observed with quiescence. We specifically ask whether there is a quiescence histone “code,” a mechanism whereby the language encoded by specific combinations of histone marks is read and relayed downstream to modulate cell state and function. We conclude by highlighting emerging technologies that can be applied to gain greater insight into the role of a histone code for quiescence.
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Affiliation(s)
- Kenya Bonitto
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, United States
| | - Kirthana Sarathy
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, United States
| | - Kaiser Atai
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, United States.,Molecular Biology Interdepartmental Doctoral Program, University of California, Los Angeles, Los Angeles, CA, United States.,Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Mithun Mitra
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, United States.,Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Hilary A Coller
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, United States.,Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States.,Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, United States
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15
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Zhou HR, Shen JZ, Fu HY, Zhang F. Genistein-induced Anticancer Effects on Acute Leukemia Cells Involve the Regulation of Wnt Signaling Pathway Through H4K20me1 Rather Than DNA Demethylation. Curr Med Sci 2021; 41:869-879. [PMID: 34669117 DOI: 10.1007/s11596-021-2445-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 08/25/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVE To investigate the effects and mechanisms of genistein on the gene expression in the Wnt pathway in acute leukemia (AL) cells. METHODS The expression of Wnt pathway genes and cell cycle-related genes were analyzed in two AL cell lines. Pyrophosphate sequencing was performed to determine the methylation degree. Then, the enrichment of H4K20me1 and H3K9ac was determined using ChIP-qPCR. Flow cytometry was used to analyze the cell cycle. RESULTS The IC50 of genistein in the two AL cell lines was lower than that for the bone marrow mesenchymal stem cell line. Genistein upregulated H4K20me1, KMT5A and Wnt suppressor genes, including Wnt5a, and downregulated the downstream target genes of Wnt, such as c-myc and β-catenin. The methylation degree and H3K9ac enrichment in the Wnt5a promoter region remained unchanged. However, the enrichment of H4K20me1 in the Wnt5a promoter and coding regions increased. In addition, genistein upregulated Phospho-cdc2, Myt1, Cyclin A, Cyclin E2, p21 and Phospho-histone H3, but downregulated Phospho-wee1. Cell cycle arrest was induced in the G2/M phase. CONCLUSION Genistein inhibits the activation of the Wnt pathway by promoting the expression of Wnt5a through the activation of KMT5A and enrichment of H4K20me1 in the Wnt5a gene promoter and coding regions, rather than demethylation. Genistein also blocks the cell cycle in the G2/M phase. Therefore, genistein is a potential anti-leukemia drug.
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Affiliation(s)
- Hua-Rong Zhou
- Fujian Medical Center of Hematology, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fujian Medical University Union Hospital, Fuzhou, 350001, China
| | - Jian-Zhen Shen
- Fujian Medical Center of Hematology, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fujian Medical University Union Hospital, Fuzhou, 350001, China.
| | - Hai-Ying Fu
- Fujian Medical Center of Hematology, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fujian Medical University Union Hospital, Fuzhou, 350001, China
| | - Feng Zhang
- Fujian Medical Center of Hematology, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fujian Medical University Union Hospital, Fuzhou, 350001, China
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16
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Huang J, Gujar MR, Deng Q, Y Chia S, Li S, Tan P, Sung W, Wang H. Histone lysine methyltransferase Pr-set7/SETD8 promotes neural stem cell reactivation. EMBO Rep 2021; 22:e50994. [PMID: 33565211 PMCID: PMC8024890 DOI: 10.15252/embr.202050994] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 01/05/2021] [Accepted: 01/12/2021] [Indexed: 01/07/2023] Open
Abstract
The ability of neural stem cells (NSCs) to switch between quiescence and proliferation is crucial for brain development and homeostasis. Increasing evidence suggests that variants of histone lysine methyltransferases including KMT5A are associated with neurodevelopmental disorders. However, the function of KMT5A/Pr-set7/SETD8 in the central nervous system is not well established. Here, we show that Drosophila Pr-Set7 is a novel regulator of NSC reactivation. Loss of function of pr-set7 causes a delay in NSC reactivation and loss of H4K20 monomethylation in the brain. Through NSC-specific in vivo profiling, we demonstrate that Pr-set7 binds to the promoter region of cyclin-dependent kinase 1 (cdk1) and Wnt pathway transcriptional co-activator earthbound1/jerky (ebd1). Further validation indicates that Pr-set7 is required for the expression of cdk1 and ebd1 in the brain. Similar to Pr-set7, Cdk1 and Ebd1 promote NSC reactivation. Finally, overexpression of Cdk1 and Ebd1 significantly suppressed NSC reactivation defects observed in pr-set7-depleted brains. Therefore, Pr-set7 promotes NSC reactivation by regulating Wnt signaling and cell cycle progression. Our findings may contribute to the understanding of mammalian KMT5A/PR-SET7/SETD8 during brain development.
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Affiliation(s)
- Jiawen Huang
- Neuroscience & Behavioral Disorders ProgrammeDuke‐NUS Medical SchoolSingaporeSingapore
| | - Mahekta R Gujar
- Neuroscience & Behavioral Disorders ProgrammeDuke‐NUS Medical SchoolSingaporeSingapore
| | - Qiannan Deng
- Neuroscience & Behavioral Disorders ProgrammeDuke‐NUS Medical SchoolSingaporeSingapore
| | - Sook Y Chia
- Neuroscience & Behavioral Disorders ProgrammeDuke‐NUS Medical SchoolSingaporeSingapore
- Present address:
National Neuroscience InstituteSingaporeSingapore
| | - Song Li
- Neuroscience & Behavioral Disorders ProgrammeDuke‐NUS Medical SchoolSingaporeSingapore
| | - Patrick Tan
- Genome Institute of SingaporeSingaporeSingapore
- Cancer & Stem Cell Biology ProgramDuke‐NUS Medical SchoolSingaporeSingapore
- Cellular and Molecular ResearchNational Cancer CentreSingaporeSingapore
- Cancer Science Institute of SingaporeNational University of SingaporeSingaporeSingapore
| | - Wing‐Kin Sung
- Genome Institute of SingaporeSingaporeSingapore
- Department of Computer ScienceNational University of SingaporeSingaporeSingapore
| | - Hongyan Wang
- Neuroscience & Behavioral Disorders ProgrammeDuke‐NUS Medical SchoolSingaporeSingapore
- Department of PhysiologyYong Loo Lin School of MedicineNational University of SingaporeSingaporeSingapore
- Integrative Sciences and Engineering ProgrammeNational University of SingaporeSingaporeSingapore
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