1
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Batbayar G, Ishimura A, Lyu H, Wanna-Udom S, Meguro-Horike M, Terashima M, Horike SI, Takino T, Suzuki T. ASH2L, a COMPASS core subunit, is involved in the cell invasion and migration of triple-negative breast cancer cells through the epigenetic control of histone H3 lysine 4 methylation. Biochem Biophys Res Commun 2023; 669:19-29. [PMID: 37262949 DOI: 10.1016/j.bbrc.2023.05.061] [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: 05/07/2023] [Accepted: 05/18/2023] [Indexed: 06/03/2023]
Abstract
ASH2L (Absent-Small-Homeotic-2-Like protein) is a core subunit of the COMPASS (COMplex of Proteins ASsociated with Set1) complex, the most notable writer of the methylation of histone H3 lysine 4 (H3K4). The COMPASS complex regulates active promoters or enhancers for gene expression, and its dysfunction is associated with aberrant development and disease. Here, we demonstrated that ASH2L mediated the cell invasion and migration activity of triple-negative breast cancer cells through the interaction with the COMPASS components and the target genomic regions. Transcriptome analysis indicated a potential correlation between ASH2L and the genes involved in inflammatory/immune responses. Among them, we found that the intrinsic expression of IL1B (interleukin 1 beta), an essential proinflammatory gene, was directly regulated by ASH2L. These results revealed a novel role of ASH2L on the maintenance of breast cancer malignancy possibly through H3K4 methylation of the target inflammatory/immune responsive genes.
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Affiliation(s)
- Gerelsuren Batbayar
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Ishikawa, Japan
| | - Akihiko Ishimura
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Ishikawa, Japan
| | - Hanbing Lyu
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Ishikawa, Japan
| | - Sasithorn Wanna-Udom
- Department of Anatomy, Faculty of Medical Science, Naresuan University, Thailand
| | - Makiko Meguro-Horike
- Division of Integrated Omics Research, Research Center for Experimental Modeling of Human Disease, Kanazawa University, Takara-machi, Kanazawa, 920-0934, Ishikawa, Japan
| | - Minoru Terashima
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Ishikawa, Japan
| | - Shin-Ichi Horike
- Division of Integrated Omics Research, Research Center for Experimental Modeling of Human Disease, Kanazawa University, Takara-machi, Kanazawa, 920-0934, Ishikawa, Japan
| | - Takahisa Takino
- Division of Education for Global Standard, Institute of Liberal Arts and Science, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Ishikawa, Japan
| | - Takeshi Suzuki
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Ishikawa, Japan.
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2
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L Hardison K, M Hawk T, A Bouley R, C Petreaca R. KAT5 histone acetyltransferase mutations in cancer cells. MICROPUBLICATION BIOLOGY 2022; 2022:10.17912/micropub.biology.000676. [PMID: 36530474 PMCID: PMC9748724 DOI: 10.17912/micropub.biology.000676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 11/21/2022] [Accepted: 11/21/2022] [Indexed: 01/25/2023]
Abstract
Cancer cells are characterized by accumulation of mutations due to improperly repaired DNA damage. The DNA double strand break is one of the most severe form of damage and several redundant mechanisms have evolved to facilitate accurate repair. During DNA replication and in mitosis, breaks are primarily repaired by homologous recombination which is facilitated by several genes. Key to this process is the breast cancer susceptibility genes BRCA1 and BRCA2 as well as the accessory RAD52 gene. Proper chromatin remodeling is also essential for repair and the KAT5 histone acetyltransferase facilitates histone removal at the break. Here we undertook a pan cancer analysis to investigate mutations within the KAT5 gene in cancer cells. We employed two standard artificial algorithms to classify mutations as either driver (CHASMPlus algorithm) or pathogenic (VEST4 algorithm). We find that most predicted driver and disease-causing mutations occur in the catalytic site or within key regulatory domains. In silico analysis of protein structure using AlphaFold shows that these mutations are likely to destabilize the function of KAT5 or interactions with DNA or its other partners. The data presented here, although preliminary, could be used to inform clinical strategies.
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3
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Suphakhong K, Terashima M, Wanna-udom S, Takatsuka R, Ishimura A, Takino T, Suzuki T. m6A RNA methylation regulates the transcription factors JUN and JUNB in TGF-β-induced epithelial-mesenchymal transition of lung cancer cells. J Biol Chem 2022; 298:102554. [PMID: 36183833 PMCID: PMC9619186 DOI: 10.1016/j.jbc.2022.102554] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 09/20/2022] [Accepted: 09/23/2022] [Indexed: 11/30/2022] Open
Abstract
N6-methyladenosine (m6A) is the most common internal chemical modification of mRNAs involved in many pathological processes including various cancers. In this study, we investigated the m6A-dependent regulation of JUN and JUNB transcription factors (TFs) during transforming growth factor-beta–induced epithelial–mesenchymal transition (EMT) of A549 and LC2/ad lung cancer cell lines, as the function and regulation of these TFs within this process remains to be clarified. We found that JUN and JUNB played an important and nonredundant role in the EMT-inducing gene expression program by regulating different mesenchymal genes and that their expressions were controlled by methyltransferase-like 3 (METTL3) m6A methyltransferase. METTL3–mediated regulation of JUN expression is associated with the translation process of JUN protein but not with the stability of JUN protein or mRNA, which is in contrast with the result of m6A-mediated regulation of JUNB mRNA stability. We identified the specific m6A motifs responsible for the regulation of JUN and JUNB in EMT within 3′UTR of JUN and JUNB. Furthermore, we discovered that different m6A reader proteins interacted with JUN and JUNB mRNA and controlled m6A-dependent expression of JUN protein and JUNB mRNA. These results demonstrate that the different modes of m6A-mediated regulation of JUN and JUNB TFs provide critical input in the gene regulatory network during transforming growth factor-beta–induced EMT of lung cancer cells.
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Wanna-Udom S, Terashima M, Suphakhong K, Ishimura A, Takino T, Suzuki T. KDM2B is involved in the epigenetic regulation of TGF-β-induced epithelial-mesenchymal transition in lung and pancreatic cancer cell lines. J Biol Chem 2021; 296:100213. [PMID: 33779563 PMCID: PMC7948487 DOI: 10.1074/jbc.ra120.015502] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 12/14/2020] [Accepted: 12/18/2020] [Indexed: 12/13/2022] Open
Abstract
Polycomb repressive complex-1 (PRC1) induces transcriptional repression by regulating monoubiquitination of lysine 119 of histone H2A (H2AK119) and as such is involved in a number of biological and pathological processes including cancer development. Previously we demonstrated that PRC2, which catalyzes the methylation of histone H3K27, has an essential function in TGF-β-induced epithelial–mesenchymal transition (EMT) of lung and pancreatic cancer cell lines. Since the cooperative activities of PRC1 and PRC2 are thought to be important for transcriptional repression in EMT program, we investigated the role of KDM2B, a member of PRC1 complex, on TGF-β-induced EMT in this study. Knockdown of KDM2B inhibited TGF-β-induced morphological conversion of the cells and enhanced cell migration and invasion potentials as well as the expression changes of EMT-related marker genes. Overexpression of KDM2B influenced the expression of several epithelial marker genes such as CDH1, miR200a, and CGN and enhanced the effects of TGF-β. Mechanistic investigations revealed that KDM2B specifically recognized the regulatory regions of CDH1, miR200a, and CGN genes and induced histone H2AK119 monoubiquitination as a component of PRC1 complex, thereby mediating the subsequent EZH2 recruitment and histone H3K27 methylation process required for gene repression. Studies using KDM2B mutants confirmed that its DNA recognition property but not its histone H3 demethylase activity was indispensable for its function during EMT. This study demonstrated the significance of the regulation of histone H2A ubiquitination in EMT process and provided the possibility to develop novel therapeutic strategies for the treatment of cancer metastasis.
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Affiliation(s)
- Sasithorn Wanna-Udom
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa Ishikawa, Japan
| | - Minoru Terashima
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa Ishikawa, Japan
| | - Kusuma Suphakhong
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa Ishikawa, Japan
| | - Akihiko Ishimura
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa Ishikawa, Japan
| | - Takahisa Takino
- Division of Education for Global Standard, Institute of Liberal Arts and Science, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Takeshi Suzuki
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa Ishikawa, Japan.
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5
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17β-estradiol binding to ERα promotes the progression of prolactinoma through estrogen-response element-induced CaBP-9k up-regulation. Biosci Rep 2020; 40:221738. [PMID: 31894842 PMCID: PMC6960063 DOI: 10.1042/bsr20191330] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 08/19/2019] [Accepted: 09/03/2019] [Indexed: 12/26/2022] Open
Abstract
17β-estradiol (E2) is considered to be an important instigator of prolactinoma, and can positively regulate the expression of calbindin-D9k (CaBP-9k) which contains an estrogen responsive element (ERE) via estrogen receptors (ERs). However, the detailed mechanism of E2 in promoting CaBP-9k expression and their roles in prolactinoma progression remain unclear. Here, we aimed to characterize it. The luciferase gene reporter assay with luc-ERE transfection showed that E2 treatment significantly enhanced the transcriptional level of CaBP-9k, whereas CaBP-9k activity was reduced when GH3 and MMQ cells were treated with AZD9496, an antagonist of ERα. E2 treatment increased the protein expressions of CaBP-9k and ERα but not ERβ, whereas this effect was also abolished when cells were treated with AZD9496. Besides, immunoprecipitation (IP) and immunofluorescence assays demonstrated that CaBP-9k could directly interact with ERα not ERβ, and Chromatin IP (ChIP) assay showed that ERα could bind to ERE of the CaBP-9k promoter. Moreover, cell counting kit-8 (CCK-8) and flow cytometry assays showed that E2 treatment significantly enhanced cell viability and inhibited cell apoptosis, but these effects were all abolished when ERα was down-regulated by short hairpin RNA (shRNA) or inhibited by AZD9496, as well as CaBP-9K suppression in both GH3 and MMQ cell lines. Taken together, these findings indicated that E2 stimulation promoted prolactin cell proliferation and inhibited cell apoptosis through ERα-induced CaBP-9k up-regulation, which then accelerated the advanced progression of prolactinoma.
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Han X, Zhu N, Wang Y, Cheng G. 1,25(OH)2D3 inhibits osteogenic differentiation through activating β‑catenin signaling via downregulating bone morphogenetic protein 2. Mol Med Rep 2020; 22:5023-5032. [PMID: 33173996 PMCID: PMC7646955 DOI: 10.3892/mmr.2020.11619] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 11/18/2019] [Indexed: 01/17/2023] Open
Abstract
The present study explored whether bone morphogenetic proteins (BMPs) and Wnt/β-catenin signaling pathways were involved in the 1,25(OH)2D3-induced inhibition of osteogenic differentiation in bone marrow-derived mesenchymal stem cells (BMSCs). To evaluate the osteogenic differentiation of BMSCs, the expression levels of ossification markers, including BMP2, Runt-related transcription factor 2 (Runx2), Msh homeobox 2 (Msx2), osteopontin (OPN) and osteocalcin (OCN), and the activity of alkaline phosphatase (ALP), as well as the calcified area observed by Alizarin red-S staining, were investigated. Chromatin immunoprecipitation (ChIP) assay was used to detect the effect of 1,25(OH)2D3 on the DNA methylation and histone modification of BMP2, while an immunoprecipitation (IP) assay was performed to assess the crosstalk between Smad1 and disheveled-1 (Dvl-1) proteins. It was observed that 1,25(OH)2D3 significantly decreased the expression levels of BMP2, Runx2, Msx2, OPN and OCN, and reduced ALP activity and the calcified area in BMSCs, whereas these effects were rescued by BMP2 overexpression. ChIP assay revealed that BMSCs treated with 1,25(OH)2D3 exhibited a significant increase in H3K9me2 level and a decrease in the acetylation of histone H3 at the same BMP2 promoter region. In addition, 1,25(OH)2D3 treatment promoted the nuclear accumulation of β-catenin by downregulating BMP2. Furthermore, the β-catenin signaling inhibitor XAV-939 weakened the inhibitory effect of 1,25(OH)2D3 on osteogenic differentiation. Additionally, knockdown of β-catenin rescued the attenuation in Dvl-1 and Smad1 interaction caused by 1,25(OH)2D3. Overexpression of Smad1 also reversed the inhibitory effect of 1,25(OH)2D3 on osteogenic differentiation. Taken together, the current study demonstrated that 1,25(OH)2D3 inhibited the differentiation of BMSCs into osteoblast-like cells by inactivating BMP2 and activating Wnt/β-catenin signaling.
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Affiliation(s)
- Xiaofeng Han
- Department of Orthopedics, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, P.R. China
| | - Naifeng Zhu
- Department of Orthopedics, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, P.R. China
| | - Yihan Wang
- Department of Orthopedics, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, P.R. China
| | - Guangqi Cheng
- Department of Orthopedics, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, P.R. China
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7
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Proteasomal degradation of polycomb-group protein CBX6 confers MMP-2 expression essential for mesothelioma invasion. Sci Rep 2020; 10:16678. [PMID: 33028834 PMCID: PMC7541533 DOI: 10.1038/s41598-020-72448-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 08/26/2020] [Indexed: 12/23/2022] Open
Abstract
The aggressive invasiveness of malignant mesothelioma limits cancer therapy, however, the molecular mechanisms underlying the invasiveness remain largely unknown. Here we found that the matrix metalloproteinase-2 (MMP-2) was required for the invasion of mesothelioma cells in the collagen matrix and the gene expression of MMP-2 was correlated with the invasive phenotype. The MMP-2 gene expression was regulated by DNA and histone methylation around the transcription start site, implicating the involvement of the polycomb repressive complex (PRC). Knockdown of PRC component chromobox 6 (CBX6) promoted MMP-2 expression and invasion of mesothelioma cells. Transcriptome analysis suggested that CBX6 regulates sets of genes involved in cancer cell migration and metastasis. In invasive but not non-invasive cells, CBX6 was constantly unstable owing to ubiquitination and protein degradation. In human tissues, CBX6 localized in the nuclei of normal mesothelium and benign mesothelioma, but the nuclear staining of CBX6 was lost in malignant mesothelioma. These results suggest involvement of proteasomal degradation of CBX6 in mesothelioma progression.
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8
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Lee J, Molley TG, Seward CH, Abdeen AA, Zhang H, Wang X, Gandhi H, Yang JL, Gaus K, Kilian KA. Geometric regulation of histone state directs melanoma reprogramming. Commun Biol 2020; 3:341. [PMID: 32620903 PMCID: PMC7334222 DOI: 10.1038/s42003-020-1067-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 06/11/2020] [Indexed: 02/07/2023] Open
Abstract
Malignant melanoma displays a high degree of cellular plasticity during disease progression. Signals in the tumor microenvironment are believed to influence melanoma plasticity through changes in the epigenetic state to guide dynamic differentiation and de-differentiation. Here we uncover a relationship between geometric features at perimeter regions of melanoma aggregates, and reprogramming to a stem cell-like state through histone marks H3K4Me2 and H3K9Ac. Using an in vitro tumor microengineering approach, we find spatial enrichment of these histone modifications with concurrent expression of stemness markers. The epigenetic modifier PRDM14 overlaps with H3K9Ac and shows elevated expression in cells along regions of perimeter curvature. siRNA knockdown of PRDM14 abolishes the MIC phenotype suggesting a role in regulating melanoma heterogeneity. Our results suggest mechanotransduction at the periphery of melanoma aggregates may orchestrate the activity of epigenetic modifiers to regulate histone state, cellular plasticity, and tumorigenicity. Junmin Lee et al. study the role of geometric features at the perimeter regions of melanoma aggregates in programming stem cell-like state through histone marks. They use a tumor microengineering approach in vitro and report a spatial enrichment of histone modifications with stemness markers. Their work uncovers a mechanotransduction signaling that regulates epigenetic modifiers to regulate tumorigenicity.
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Affiliation(s)
- Junmin Lee
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.,Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Thomas G Molley
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.,School of Chemistry, School of Materials Science and Engineering, Australian Centre for NanoMedicine, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Christopher H Seward
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.,Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Amr A Abdeen
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.,Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Huimin Zhang
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.,Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Xiaochun Wang
- Prince of Wales Clinical School, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Hetvi Gandhi
- European Molecular Biology Laboratory Australia Node in Single Molecule Science and ARC Centre of Excellence in Advanced Molecular Imaging, School of Medical Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Jia-Lin Yang
- Prince of Wales Clinical School, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Katharina Gaus
- European Molecular Biology Laboratory Australia Node in Single Molecule Science and ARC Centre of Excellence in Advanced Molecular Imaging, School of Medical Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Kristopher A Kilian
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA. .,Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA. .,School of Chemistry, School of Materials Science and Engineering, Australian Centre for NanoMedicine, University of New South Wales, Sydney, NSW, 2052, Australia. .,Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
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9
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Wanna-Udom S, Terashima M, Lyu H, Ishimura A, Takino T, Sakari M, Tsukahara T, Suzuki T. The m6A methyltransferase METTL3 contributes to Transforming Growth Factor-beta-induced epithelial-mesenchymal transition of lung cancer cells through the regulation of JUNB. Biochem Biophys Res Commun 2020; 524:150-155. [PMID: 31982139 DOI: 10.1016/j.bbrc.2020.01.042] [Citation(s) in RCA: 94] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 01/06/2020] [Accepted: 01/07/2020] [Indexed: 01/08/2023]
Abstract
N6-Methyladenosine (m6A) is the most common internal chemical modification of mRNAs involved in many pathological processes including various cancers. In this study, we investigated the role of m6A methyltransferase METTL3 in TGF-β-induced epithelial-mesenchymal transition (EMT) of lung cancer cell lines. The expression of METTL3 and m6A RNA modification were increased during TGF-β-induced EMT of A549 and LC2/ad lung cancer cells. Knockdown of METTL3 inhibited TGF-β-induced morphological conversion of the cells, enhanced cell migration potential and the expression changes of EMT-related marker genes such as CDH1/E-cadherin, FN1/Fibronectin and VIM/Vimentin. Mechanistic investigations revealed that METTL3 knockdown decreased the m6A modification, total mRNA level and mRNA stability of JUNB, one of the important transcriptional regulators of EMT. Over-expression of JUNB partially rescued the inhibitory effects of METTL3 knockdown in the EMT phenotypes. This study demonstrates that m6A methyltransferase METTL3 is indispensable for TGF-β-induced EMT of lung cancer cells through the regulation of JUNB.
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Affiliation(s)
- Sasithorn Wanna-Udom
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Ishikawa, Japan
| | - Minoru Terashima
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Ishikawa, Japan
| | - Hanbing Lyu
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Ishikawa, Japan
| | - Akihiko Ishimura
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Ishikawa, Japan
| | - Takahisa Takino
- Division of Education for Global Standard, Institute of Liberal Arts and Science, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Ishikawa, Japan
| | - Matomo Sakari
- Area of Bioscience and Biotechnology, Japan Advanced Institute of Science and Technology, Nomi, 923-1292, Ishikawa, Japan
| | - Toshifumi Tsukahara
- Area of Bioscience and Biotechnology, Japan Advanced Institute of Science and Technology, Nomi, 923-1292, Ishikawa, Japan
| | - Takeshi Suzuki
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Ishikawa, Japan.
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10
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Wang X, Lyu J, Ji A, Zhang Q, Liao G. Jarid2 enhances the progression of bladder cancer through regulating PTEN/AKT signaling. Life Sci 2019; 230:162-168. [DOI: 10.1016/j.lfs.2019.05.053] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 05/14/2019] [Accepted: 05/20/2019] [Indexed: 12/15/2022]
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11
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Terashima M, Ishimura A, Wanna-Udom S, Suzuki T. MEG8 long noncoding RNA contributes to epigenetic progression of the epithelial-mesenchymal transition of lung and pancreatic cancer cells. J Biol Chem 2018; 293:18016-18030. [PMID: 30262664 DOI: 10.1074/jbc.ra118.004006] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 09/24/2018] [Indexed: 12/14/2022] Open
Abstract
Long noncoding RNAs (lncRNAs) are important regulatory molecules in various biological and pathological processes, including cancer development. We have previously shown that the MEG3 lncRNA plays an essential role in transforming growth factor-β (TGF-β)-induced epithelial-mesenchymal transition (EMT) of human lung cancer cells. In this study, we investigated the function of another lncRNA, MEG8, which shares the DLK1-DIO3 locus with MEG3, in the regulation of EMT. MEG8 lncRNA expression was immediately induced during TGF-β-mediated EMT of A549 and LC2/ad lung cancer and Panc1 pancreatic cancer cell lines. MEG8 overexpression specifically suppressed the expression of microRNA-34a and microRNA-203 genes, resulting in up-regulation of SNAIL family transcriptional repressor 1 (SNAI1) and SNAI2 transcription factors, which repressed expression of cadherin 1 (CDH1)/E-cadherin. Mechanistic investigations revealed that MEG8 associates with enhancer of zeste 2 polycomb repressive complex 2 subunit (EZH2) protein and induces its recruitment to the regulatory regions of the two microRNA genes for histone H3 methylation and transcriptional repression. Interestingly, expression of both MEG8 and MEG3, but not each individually, could induce EMT-related cell morphological changes and increased cell motility in the absence of TGF-β by activating the gene expression program required for EMT. MEG8 knockdown indicated that endogenous MEG8 lncRNA is indispensable for TGF-β-induced EMT in A549 lung cancer and Panc1 pancreatic cancer cells. Our findings indicate that MEG8 lncRNA significantly contributes to epigenetic EMT induction and increase our understanding of the lncRNA-mediated regulatory mechanisms involved in malignant progression of cancer.
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Affiliation(s)
- Minoru Terashima
- From the Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa 920-1192, Ishikawa, Japan
| | - Akihiko Ishimura
- From the Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa 920-1192, Ishikawa, Japan
| | - Sasithorn Wanna-Udom
- From the Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa 920-1192, Ishikawa, Japan
| | - Takeshi Suzuki
- From the Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa 920-1192, Ishikawa, Japan.
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12
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Harmeyer KM, Facompre ND, Herlyn M, Basu D. JARID1 Histone Demethylases: Emerging Targets in Cancer. Trends Cancer 2017; 3:713-725. [PMID: 28958389 DOI: 10.1016/j.trecan.2017.08.004] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 08/10/2017] [Accepted: 08/11/2017] [Indexed: 01/04/2023]
Abstract
JARID1 proteins are histone demethylases that both regulate normal cell fates during development and contribute to the epigenetic plasticity that underlies malignant transformation. This H3K4 demethylase family participates in multiple repressive transcriptional complexes at promoters and has broader regulatory effects on chromatin that remain ill-defined. There is growing understanding of the oncogenic and tumor suppressive functions of JARID1 proteins, which are contingent on cell context and the protein isoform. Their contributions to stem cell-like dedifferentiation, tumor aggressiveness, and therapy resistance in cancer have sustained interest in the development of JARID1 inhibitors. Here we review the diverse and context-specific functions of the JARID1 proteins that may impact the utilization of emerging targeted inhibitors of this histone demethylase family in cancer therapy.
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Affiliation(s)
- Kayla M Harmeyer
- Department of Otorhinolaryngology-Head and Neck Surgery, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Nicole D Facompre
- Department of Otorhinolaryngology-Head and Neck Surgery, University of Pennsylvania, Philadelphia, PA 19104, USA
| | | | - Devraj Basu
- Department of Otorhinolaryngology-Head and Neck Surgery, University of Pennsylvania, Philadelphia, PA 19104, USA; The Wistar Institute, Philadelphia, PA 19104, USA; Philadelphia VA Medical Center, Philadelphia, PA 19104, USA.
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13
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Gunarta IK, Li R, Nakazato R, Suzuki R, Boldbaatar J, Suzuki T, Yoshioka K. Critical role of glioma-associated oncogene homolog 1 in maintaining invasive and mesenchymal-like properties of melanoma cells. Cancer Sci 2017; 108:1602-1611. [PMID: 28635133 PMCID: PMC5543504 DOI: 10.1111/cas.13294] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 05/30/2017] [Accepted: 06/03/2017] [Indexed: 12/14/2022] Open
Abstract
Cutaneous melanoma is the most aggressive form of skin cancer. This aggressiveness appears to be due to the cancer cells' ability to reversibly switch between phenotypes with non-invasive and invasive potential, and microphthalmia-associated transcription factor (MITF) is known to play a central role in this process. The transcription factor glioma-associated oncogene homolog 1 (GLI1) is a component of the canonical and noncanonical sonic hedgehog pathways. Although GLI1 has been suggested to be involved in melanoma progression, its precise role and the mechanism underlying invasion remain unclear. Here we investigated whether and how GLI1 is involved in the invasive ability of melanoma cells. Gli1 knockdown (KD) melanoma cell lines, established by using Gli1-targeting lentiviral short hairpin RNA, exhibited a markedly reduced invasion ability, but their MITF expression and activity were the same as controls. Gli1 KD melanoma cells also led to less lung metastasis in mice compared with control melanoma cells. Furthermore, the Gli1 KD melanoma cells underwent a mesenchymal-to-epithelial-like transition, accompanied by downregulation of the epithelial-to-mesenchymal transition (EMT)-inducing transcription factors (EMT-TF) Snail1, Zeb1 and Twist1, but not Snail2 or Zeb2. Collectively, these results indicate that GLI1 is important for maintaining the invasive and mesenchymal-like properties of melanoma cells independent of MITF, most likely by modulating a subset of EMT-TF. Our findings provide new insight into how heterogeneity and plasticity are achieved and regulated in melanoma.
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Affiliation(s)
- I Ketut Gunarta
- Division of Molecular Cell SignalingCancer Research InstituteKanazawa UniversityKanazawaJapan
| | - Rong Li
- Division of Molecular Cell SignalingCancer Research InstituteKanazawa UniversityKanazawaJapan
| | - Ryota Nakazato
- Division of Molecular Cell SignalingCancer Research InstituteKanazawa UniversityKanazawaJapan
| | - Ryusuke Suzuki
- Division of Molecular Cell SignalingCancer Research InstituteKanazawa UniversityKanazawaJapan
| | - Jambaldorj Boldbaatar
- Division of Molecular Cell SignalingCancer Research InstituteKanazawa UniversityKanazawaJapan
| | - Takeshi Suzuki
- Division of Functional GenomicCancer Research InstituteKanazawa UniversityKanazawaJapan
| | - Katsuji Yoshioka
- Division of Molecular Cell SignalingCancer Research InstituteKanazawa UniversityKanazawaJapan
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14
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Terashima M, Tange S, Ishimura A, Suzuki T. MEG3 Long Noncoding RNA Contributes to the Epigenetic Regulation of Epithelial-Mesenchymal Transition in Lung Cancer Cell Lines. J Biol Chem 2016; 292:82-99. [PMID: 27852821 DOI: 10.1074/jbc.m116.750950] [Citation(s) in RCA: 136] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 11/02/2016] [Indexed: 12/24/2022] Open
Abstract
Histone methylation is implicated in a number of biological and pathological processes, including cancer development. In this study, we investigated the molecular mechanism for the recruitment of Polycomb repressive complex-2 (PRC2) and its accessory component, JARID2, to chromatin, which regulates methylation of lysine 27 of histone H3 (H3K27), during epithelial-mesenchymal transition (EMT) of cancer cells. The expression of MEG3 long noncoding RNA (lncRNA), which could interact with JARID2, was clearly increased during transforming growth factor-β (TGF-β)-induced EMT of human lung cancer cell lines. Knockdown of MEG3 inhibited TGF-β-mediated changes in cell morphology and cell motility characteristic of EMT and counteracted TGF-β-dependent changes in the expression of EMT-related genes such as CDH1, ZEB family, and the microRNA-200 family. Overexpression of MEG3 influenced the expression of these genes and enhanced the effects of TGF-β in their expressions. Chromatin immunoprecipitation (ChIP) revealed that MEG3 regulated the recruitment of JARID2 and EZH2 and histone H3 methylation on the regulatory regions of CDH1 and microRNA-200 family genes for transcriptional repression. RNA immunoprecipitation and chromatin isolation by RNA purification assays indicated that MEG3 could associate with JARID2 and the regulatory regions of target genes to recruit the complex. This study demonstrated a crucial role of MEG3 lncRNA in the epigenetic regulation of the EMT process in lung cancer cells.
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Affiliation(s)
- Minoru Terashima
- From the Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa 920-1192, Ishikawa, Japan
| | - Shoichiro Tange
- From the Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa 920-1192, Ishikawa, Japan
| | - Akihiko Ishimura
- From the Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa 920-1192, Ishikawa, Japan
| | - Takeshi Suzuki
- From the Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa 920-1192, Ishikawa, Japan
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15
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Wang D, Han S, Peng R, Jiao C, Wang X, Yang X, Yang R, Li X. Depletion of histone demethylase KDM5B inhibits cell proliferation of hepatocellular carcinoma by regulation of cell cycle checkpoint proteins p15 and p27. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2016; 35:37. [PMID: 26911146 PMCID: PMC4766611 DOI: 10.1186/s13046-016-0311-5] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 02/19/2016] [Indexed: 01/12/2023]
Abstract
Background KDM5B is a jmjc domain-containing histone demethylase which remove tri-, di-, and monomethyl groups from histone H3 lysine 4 (H3K4). KDM5B has been determined as an oncogene in many malignancies. However, its expression and role in hepatocellular carcinoma (HCC) remain unknown. Methods We detected the expression of KDM5B in HCC tissues and cell lines. Cell proliferation was performed to reveal the role of KDM5B depletion on HCC cells both in vivo and in vitro. Flow cytometry was used to analyze the cell cycle and chip analysis was conducted to determine the direct target of KDM5B. Results KDM5B is frequently up-regulated in HCC specimens compared with adjacent normal tissues and its expression level was significantly correlated with tumor size, TNM stage, and Edmondson grade. Moreover, Kaplan-Meier survival analysis showed that patients with high levels of KDM5B expression had a relatively poor prognosis. Knockdown of KDM5B notably inhibits HCC cell proliferation both in vivo and in vitro via arresting the cell cycle at G1/S phase partly through up-regulation of p15 and p27. Further molecular mechanism study indicates that silencing of KDM5B promotes p15 and p27 expression by increasing histone H3K4 trimethylation in their promoters. Conclusions KDM5B could be a potentially therapeutic target, which provides a rationale for the development of histone demethylase inhibitors as a strategy against HCC. Electronic supplementary material The online version of this article (doi:10.1186/s13046-016-0311-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Dong Wang
- Liver Transplantation Center, Key Laboratory of Living Donor Liver Transplantation, Ministry of Public Health, First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Sheng Han
- Liver Transplantation Center, Key Laboratory of Living Donor Liver Transplantation, Ministry of Public Health, First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Rui Peng
- Department of General Surgery, Nanjing Medical University Affiliated Cancer Hospital, Cancer Institute of Jiangsu Province, Nanjing, China
| | - Chenyu Jiao
- Liver Transplantation Center, Key Laboratory of Living Donor Liver Transplantation, Ministry of Public Health, First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Xing Wang
- Liver Transplantation Center, Key Laboratory of Living Donor Liver Transplantation, Ministry of Public Health, First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Xinxiang Yang
- Liver Transplantation Center, Key Laboratory of Living Donor Liver Transplantation, Ministry of Public Health, First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Renjie Yang
- Liver Transplantation Center, Key Laboratory of Living Donor Liver Transplantation, Ministry of Public Health, First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Xiangcheng Li
- Liver Transplantation Center, Key Laboratory of Living Donor Liver Transplantation, Ministry of Public Health, First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China.
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16
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Oktyabri D, Ishimura A, Tange S, Terashima M, Suzuki T. DOT1L histone methyltransferase regulates the expression of BCAT1 and is involved in sphere formation and cell migration of breast cancer cell lines. Biochimie 2016; 123:20-31. [PMID: 26783998 DOI: 10.1016/j.biochi.2016.01.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Accepted: 01/13/2016] [Indexed: 10/22/2022]
Abstract
DOT1L is a histone H3 lysine 79 (H3K79) methyltransferase mainly implicated in leukemia. Here we analyzed the function of DOT1L in breast cancer cells. The expression of DOT1L was up-regulated in malignant breast cancer tissues. Over-expression of DOT1L significantly increased the sphere formation and the cell migration activities of MCF7 breast cancer cell line. In contrast, knockdown of DOT1L reduced the cell migration activity of MDA-MB-231 breast cancer cell line. BCAT1, which encodes a branched-chain amino acid transaminase, was identified as one of the target genes controlled by DOT1L through the regulation of H3K79 methylation. Mechanistic investigation revealed that BCAT1 might be an important regulator responsible for DOT1L-mediated sphere formation and cell migration in breast cancer cells.
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Affiliation(s)
- Dulamsuren Oktyabri
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa 920-1192, Ishikawa, Japan
| | - Akihiko Ishimura
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa 920-1192, Ishikawa, Japan; Molecular Therapeutic Target Research Unit, Institute for Frontier Science Initiative (InFIniti), Kanazawa University, Kanazawa 920-1192, Ishikawa, Japan
| | - Shoichiro Tange
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa 920-1192, Ishikawa, Japan
| | - Minoru Terashima
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa 920-1192, Ishikawa, Japan
| | - Takeshi Suzuki
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa 920-1192, Ishikawa, Japan; Molecular Therapeutic Target Research Unit, Institute for Frontier Science Initiative (InFIniti), Kanazawa University, Kanazawa 920-1192, Ishikawa, Japan.
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17
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Tange S, Oktyabri D, Terashima M, Ishimura A, Suzuki T. JARID2 is involved in transforming growth factor-beta-induced epithelial-mesenchymal transition of lung and colon cancer cell lines. PLoS One 2014; 9:e115684. [PMID: 25542019 PMCID: PMC4277293 DOI: 10.1371/journal.pone.0115684] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 11/25/2014] [Indexed: 02/03/2023] Open
Abstract
Histone methylation plays a crucial role in various biological and pathological processes including cancer development. In this study, we discovered that JARID2, an interacting component of Polycomb repressive complex-2 (PRC2) that catalyzes methylation of lysine 27 of histone H3 (H3K27), was involved in Transforming Growth Factor-beta (TGF-ß)-induced epithelial-mesenchymal transition (EMT) of A549 lung cancer cell line and HT29 colon cancer cell line. The expression of JARID2 was increased during TGF-ß-induced EMT of these cell lines and knockdown of JARID2 inhibited TGF-ß-induced morphological conversion of the cells associated with EMT. JARID2 knockdown itself had no effect in the expression of EMT-related genes but antagonized TGF-ß-dependent expression changes of EMT-related genes such as CDH1, ZEB family and microRNA-200 family. Chromatin immunoprecipitation assays showed that JARID2 was implicated in TGF-ß-induced transcriptional repression of CDH1 and microRNA-200 family genes through the regulation of histone H3 methylation and EZH2 occupancies on their regulatory regions. Our study demonstrated a novel role of JARID2 protein, which may control PRC2 recruitment and histone methylation during TGF-ß-induced EMT of lung and colon cancer cell lines.
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Affiliation(s)
- Shoichiro Tange
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Dulamsuren Oktyabri
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Minoru Terashima
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Akihiko Ishimura
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Takeshi Suzuki
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kanazawa, Ishikawa, Japan
- * E-mail:
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18
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Oktyabri D, Tange S, Terashima M, Ishimura A, Suzuki T. EED regulates epithelial–mesenchymal transition of cancer cells induced by TGF-β. Biochem Biophys Res Commun 2014; 453:124-30. [DOI: 10.1016/j.bbrc.2014.09.082] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 09/18/2014] [Indexed: 02/01/2023]
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19
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The histone-H3K4-specific demethylase KDM5B binds to its substrate and product through distinct PHD fingers. Cell Rep 2014; 6:325-35. [PMID: 24412361 DOI: 10.1016/j.celrep.2013.12.021] [Citation(s) in RCA: 127] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2013] [Revised: 10/24/2013] [Accepted: 12/12/2013] [Indexed: 12/13/2022] Open
Abstract
The histone lysine demethylase KDM5B regulates gene transcription and cell differentiation and is implicated in carcinogenesis. It contains multiple conserved chromatin-associated domains, including three PHD fingers of unknown function. Here, we show that the first and third, but not the second, PHD fingers of KDM5B possess histone binding activities. The PHD1 finger is highly specific for unmodified histone H3 (H3K4me0), whereas the PHD3 finger shows preference for the trimethylated histone mark H3K4me3. RNA-seq analysis indicates that KDM5B functions as a transcriptional repressor for genes involved in inflammatory responses, cell proliferation, adhesion, and migration. Biochemical analysis reveals that KDM5B associates with components of the nucleosome remodeling and deacetylase (NuRD) complex and may cooperate with the histone deacetylase 1 (HDAC1) in gene repression. KDM5B is downregulated in triple-negative breast cancer relative to estrogen-receptor-positive breast cancer. Overexpression of KDM5B in the MDA-MB 231 breast cancer cells suppresses cell migration and invasion, and the PHD1-H3K4me0 interaction is essential for inhibiting migration. These findings highlight tumor-suppressive functions of KDM5B in triple-negative breast cancer cells and suggest a multivalent mechanism for KDM5B-mediated transcriptional regulation.
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20
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Enkhbaatar Z, Terashima M, Oktyabri D, Tange S, Ishimura A, Yano S, Suzuki T. KDM5B histone demethylase controls epithelial-mesenchymal transition of cancer cells by regulating the expression of the microRNA-200 family. Cell Cycle 2013; 12:2100-12. [PMID: 23759590 DOI: 10.4161/cc.25142] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Histone methylation is implicated in various biological and pathological processes including cancer development. In this study, we discovered that ectopic expression of KDM5B, a histone H3 lysine 4 (H3K4) demethylase, promoted epithelial-mesenchymal transition (EMT) of cancer cells. KDM5B increased the expression of transcription factors, ZEB1 and ZEB2, followed by downregulation of E-cadherin and upregulation of mesenchymal marker genes. The expression of the microRNA-200 (miR-200) family, which specifically targets ZEB1 and ZEB2, was reduced in the cells with KDM5B overexpression. We found that KDM5B repressed the expression of the miR-200 family by changing histone H3 methylation status of their regulatory regions. The introduction of miR-200 precursor in the cells inhibited EMT induction by KDM5B, suggesting that miR-200 family was a critical downstream mediator of KDM5B-promoted EMT. Furthermore, knockdown of KDM5B was shown to affect the expression of EMT-related genes, indicating the involvement of endogenous KDM5B. Our study demonstrated a novel role of KDM5B histone lysine demethylase in EMT, which may contribute to malignant progression of cancer.
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Affiliation(s)
- Zanabazar Enkhbaatar
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Ishikawa, Japan
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21
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Suzuki T, Terashima M, Tange S, Ishimura A. Roles of histone methyl-modifying enzymes in development and progression of cancer. Cancer Sci 2013; 104:795-800. [PMID: 23560485 DOI: 10.1111/cas.12169] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Accepted: 04/03/2013] [Indexed: 12/13/2022] Open
Abstract
Retroviral insertional mutagenesis in mice is considered a powerful forward genetic strategy to identify disease genes involved in cancer. Our high-throughput screens led to frequent identification of the genes encoding the enzymes engaged in histone lysine methylation. Histone methylation can positively or negatively impact on gene transcription, and then fulfill important roles in developmental control and cell-fate decisions. A tremendous amount of progress has accelerated the characterization of histone methylations and the enzymes that regulate them. Deregulation of these histone methyl-modifying enzymes has been increasingly recognized as a hallmark of cancer in the last few years. However, in most cases, we have only limited understanding for the molecular mechanisms by which these enzymes contribute to cancer development and progression. In this review, we summarize the current knowledge regarding some of the best-validated examples of histone lysine methyltransferases and demethylases associated with oncogenesis and discuss their potential mechanisms of action.
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Affiliation(s)
- Takeshi Suzuki
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Ishikawa, Japan.
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22
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Ishimura A, Minehata KI, Terashima M, Kondoh G, Hara T, Suzuki T. Jmjd5, an H3K36me2 histone demethylase, modulates embryonic cell proliferation through the regulation of Cdkn1a expression. Development 2012; 139:749-59. [PMID: 22241836 DOI: 10.1242/dev.074138] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Covalent modifications of histones play an important role in chromatin architecture and dynamics. In particular, histone lysine methylation is important for transcriptional control during diverse biological processes. The nuclear protein Jmjd5 (also called Kdm8) is a histone lysine demethylase that contains a JmjC domain in the C-terminal region. In this study, we have generated Jmjd5-deficient mice (Jmjd5(Δ)(/)(Δ)) to investigate the in vivo function of Jmjd5. Jmjd5(Δ)(/)(Δ) embryos showed severe growth retardation, resulting in embryonic lethality at the mid-gestation stage. Mouse embryonic fibroblasts (MEFs) derived from Jmjd5 hypomorphic embryos (Jmjd5(neo/neo)) also showed the growth defect. Quantitative PCR analysis of various cell cycle regulators indicated that only Cdkn1a expression was upregulated in Jmjd5(neo/neo) MEFs and Jmjd5(Δ)(/)(Δ) embryos. A knockdown assay with Cdkn1a-specific small interfering RNAs revealed that the growth defect of Jmjd5(neo/neo) MEFs was significantly rescued. In addition, a genetic study using Jmjd5(Δ)(/)(Δ); Cdkn1a(Δ)(/)(Δ) double-knockout mice showed that the growth retardation of Jmjd5(Δ)(/)(Δ) embryos was partially rescued by Cdkn1a deficiency. Chromatin immunoprecipitation analysis showed that increased di-methylated lysine 36 of histone H3 (H3K36me2) and reduced recruitment of endogenous Jmjd5 were detected in the transcribed regions of Cdkn1a in Jmjd5(neo/neo) MEFs. Taken together, these results suggest that Jmjd5 physiologically moderates embryonic cell proliferation through the epigenetic control of Cdkn1a expression.
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Affiliation(s)
- Akihiko Ishimura
- Division of Functional Genomics, Cancer Research Institute, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
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