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Sun D, Guo J, Liang W, Chen Y, Wei S, Li A, Wang L, Chen X. Histone methyltransferase SUV39H2 regulates apoptosis and chemosensitivity in prostate cancer through AKT/FOXO signaling pathway. Med Oncol 2024; 41:44. [PMID: 38170382 DOI: 10.1007/s12032-023-02252-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Accepted: 11/08/2023] [Indexed: 01/05/2024]
Abstract
Prostate cancer (PCa) is one of the most common malignant tumors that exhibit both chemoresistance and recurrence. SUV39H2 is highly expressed in many types of human tumors, but its role in the development and progression of PCa has never been clarified. The aim of this study is to elucidate the role of SUV39H2 in the development and progression of PCa, its association with the AKT/FOXO signaling pathway, and its potential implications for PCa diagnosis and treatment. SUV39H2 expression was analyzed in The Cancer Genome Atlas (TCGA) and genotype tissue expression pan-cancer data. The TCGA database was evaluated for SUV39H2 enrichment and its correlation to immune cell infiltration. SUV39H2 levels in PCa tissues and control tissues were determined in 30 patients using qPCR and IHC. Clinical relevance was assessed via The Cancer Genome Atlas (TCGA). In vitro assessments including colony formation assays, Western Blot analysis, CCK-8 assays, and flow cytometry were utilized to establish SUV39H2's contribution to PCa cell growth. The influence of SUV39H2 on PC3 and DU145 cell proliferation was assessed through a cell line-derived xenograft model. Sphere formation assays and qPCR were employed to delineate SUV39H2's role in PCa stemness and chemosensitivity. In vitro macrophage polarization assays provided insights into SUV39H2's association with M2 macrophages, while enrichment analysis shed light on its role in FOXO signaling. PCa tissues expressed higher levels of SUV39H2 than normal tissues. By knocking down SUV39H2, PCa cells were made more chemosensitive to docetaxel and cell proliferation and stemness were inhibited. Additionally, SUV39H2 knockdown significantly inhibited in vivo PCa cell growth and inhibited the polarization of macrophages. Furthermore, SUV39H2 was found to regulate AKT/FOXO signaling by increasing Akt and FOXO3a phosphorylation. Our findings highlight SUV39H2's role in PCa cell apoptosis and chemosensitivity mainly by regulating the AKT/FOXO signaling pathway and suggest that SUV39H2 could be a potential target for PCa diagnosis and treatment.
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Affiliation(s)
- Donglin Sun
- Department of Urology, Shenzhen Hospital, Southern Medical University, Shenzhen, 518100, China
| | - Jing Guo
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, 510000, China
| | - Weifei Liang
- Qingyuan People's Hospital, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan, 511500, Guangdong, China
| | - Yangxiao Chen
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, 510000, China
| | - Shuqi Wei
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, 510000, China
| | - Ai Li
- Department of Clinical Medicine, The Second Clinical School of Guangzhou Medical University, Guangzhou, China
| | - Li Wang
- Nephrology Department, Southern Medical University Affiliated Longhua People's Hospital, Shenzhen, China.
| | - Xiangqiu Chen
- Department of Urology, Shenzhen Hospital, Southern Medical University, Shenzhen, 518100, China.
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Chen TQ, Guo X, Huo B, Zhong XX, Wang QH, Chen Y, Zhu XH, Feng GK, Jiang DS, Fang ZM, Wei X. BRD4770 inhibits vascular smooth muscle cell proliferation via SUV39H2, but not EHMT2 to protect against neointima formation. Hum Cell 2023; 36:1672-1688. [PMID: 37306883 PMCID: PMC10390615 DOI: 10.1007/s13577-023-00924-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 05/25/2023] [Indexed: 06/13/2023]
Abstract
The behavior of vascular smooth muscle cells (VSMCs) contributes to the formation of neointima. We previously found that EHMT2 suppressed autophagy activation in VSMCs. BRD4770, an inhibitor of EHMT2/G9a, plays a critical role in several kinds of cancers. However, whether and how BRD4770 regulates the behavior of VSMCs remain unknown. In this study, we evaluate the cellular effect of BRD4770 on VSMCs by series of experiments in vivo and ex vivo. We demonstrated that BRD4770 inhibited VSMCs' growth by blockage in G2/M phase in VSMCs. Moreover, our results demonstrated that the inhibition of proliferation was independent on autophagy or EHMT2 suppression which we previous reported. Mechanistically, BRD4770 exhibited an off-target effect from EHMT2 and our further study reveal that the proliferation inhibitory effect by BRD4770 was associated with suppressing on SUV39H2/KTM1B. In vivo, BRD4770 was also verified to rescue VIH. Thus, BRD4770 function as a crucial negative regulator of VSMC proliferation via SUV39H2 and G2/M cell cycle arrest and BRD4770 could be a molecule for the therapy of vascular restenosis.
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Affiliation(s)
- Tai-Qiang Chen
- Division of Cardiothoracic and Vascular Surgery, Sino-Swiss Heart-Lung Transplantation Institute, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xian Guo
- Division of Cardiothoracic and Vascular Surgery, Sino-Swiss Heart-Lung Transplantation Institute, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Bo Huo
- Division of Cardiothoracic and Vascular Surgery, Sino-Swiss Heart-Lung Transplantation Institute, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiao-Xuan Zhong
- Division of Cardiothoracic and Vascular Surgery, Sino-Swiss Heart-Lung Transplantation Institute, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qun-Hui Wang
- Division of Cardiothoracic and Vascular Surgery, Sino-Swiss Heart-Lung Transplantation Institute, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yue Chen
- Division of Cardiothoracic and Vascular Surgery, Sino-Swiss Heart-Lung Transplantation Institute, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xue-Hai Zhu
- Division of Cardiothoracic and Vascular Surgery, Sino-Swiss Heart-Lung Transplantation Institute, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Organ Transplantation, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Minist of Education, Chinese Academy of Medical Sciences, Wuhan, China
| | - Gao-Ke Feng
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Ding-Sheng Jiang
- Division of Cardiothoracic and Vascular Surgery, Sino-Swiss Heart-Lung Transplantation Institute, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Organ Transplantation, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Minist of Education, Chinese Academy of Medical Sciences, Wuhan, China
| | - Ze-Min Fang
- Division of Cardiothoracic and Vascular Surgery, Sino-Swiss Heart-Lung Transplantation Institute, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Xiang Wei
- Division of Cardiothoracic and Vascular Surgery, Sino-Swiss Heart-Lung Transplantation Institute, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
- Key Laboratory of Organ Transplantation, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Minist of Education, Chinese Academy of Medical Sciences, Wuhan, China.
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Maksimova V, Makus J, Popova V, Prus A, Usalka O, Trapeznikova E, Zhidkova E, Belitsky G, Yakubovskaya M, Kirsanov K. Histone Methyltransferases as a New Target for Epigenetic Action of Vorinostat. Biochemistry (Mosc) 2023; 88:968-978. [PMID: 37751867 DOI: 10.1134/s000629792307009x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 04/13/2023] [Accepted: 04/20/2023] [Indexed: 09/28/2023]
Abstract
Epigenetic genome regulation during malignant cell transformation is characterized by the aberrant methylation and acetylation of histones. Vorinostat (SAHA) is an epigenetic modulator actively used in clinical oncology. The antitumor activity of vorinostat is commonly believed to be associated with the inhibition of histone deacetylases, while the impact of this drug on histone methylation has been poorly studied. Using HeLa TI cells as a test system allowing evaluation of the effect of epigenetically active compounds from the expression of the GFP reporter gene and gene knockdown by small interfering RNAs, we showed that vorinostat not only suppressed HDAC1, but also reduced the activity of EZH2, SUV39H1, SUV39H2, and SUV420H1. The ability of vorinostat to suppress expression of EZH2, SUV39H1/2, SUV420H1 was confirmed by Western blotting. Vorinostat also downregulated expression of SUV420H2 and DOT1L enzymes. The data obtained expand our understanding of the epigenetic effects of vorinostat and demonstrate the need for a large-scale analysis of its activity toward other enzymes involved in the epigenetic genome regulation. Elucidation of the mechanism underlying the epigenetic action of vorinostat will contribute to its more proper use in the treatment of tumors with an aberrant epigenetic profile.
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Affiliation(s)
- Varvara Maksimova
- Blokhin National Medical Research Center of Oncology, Moscow, 115478, Russia
| | - Julia Makus
- Blokhin National Medical Research Center of Oncology, Moscow, 115478, Russia
- Peoples' Friendship University of Russia, Moscow, 117198, Russia
| | - Valeriia Popova
- Blokhin National Medical Research Center of Oncology, Moscow, 115478, Russia
- Dmitry Mendeleev University of Chemical Technology of Russia, Moscow, 125047, Russia
| | - Anzhelika Prus
- Blokhin National Medical Research Center of Oncology, Moscow, 115478, Russia
- MIREA, Russian Technological University, Moscow, 119571, Russia
| | - Olga Usalka
- Blokhin National Medical Research Center of Oncology, Moscow, 115478, Russia
- Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University), Moscow, 119991, Russia
| | - Ekaterina Trapeznikova
- Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University), Moscow, 119991, Russia
| | - Ekaterina Zhidkova
- Blokhin National Medical Research Center of Oncology, Moscow, 115478, Russia
| | - Gennady Belitsky
- Blokhin National Medical Research Center of Oncology, Moscow, 115478, Russia
| | | | - Kirill Kirsanov
- Blokhin National Medical Research Center of Oncology, Moscow, 115478, Russia.
- Peoples' Friendship University of Russia, Moscow, 117198, Russia
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Yang J, Xu P, Chen Z, Zhang X, Xia Y, Fang L, Xie L, Li B, Xu Z. N6-methyadenosine modified SUV39H2 regulates homologous recombination through epigenetic repression of DUSP6 in gastric cancer. Cancer Lett 2023; 558:216092. [PMID: 36806557 DOI: 10.1016/j.canlet.2023.216092] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/02/2023] [Accepted: 02/11/2023] [Indexed: 02/17/2023]
Abstract
Despite many advances in treatment over the past few years, the poor 5-year survival rate and high recurrence rate of gastric cancer (GC) remain unsatisfactory. As the most abundant epigenetic modification in the eukaryotic mRNA, N6-methyladenosine (m6A) methylation participates in tumor progression and tissue development. During tumor progression, DNA damage repair mechanisms can be reprogrammed to give new growth advantages on tumor clones whose genomic integrity is disturbed. Here we detected the elevated SUV39H2 expression in GC tissues and cell lines. Functionally, SUV39H2 promoted GC proliferation and inhibited apoptosis in vitro and in vivo. Mechanistically, METTL3-mediated m6A modification promotes mRNA stability of SUV39H2 in an IGF2BP2 dependent manner, resulting in upregulated mRNA expression of SUV39H2. As a histone methyltransferase, SUV39H2 was verified to increase the phosphorylation level of ATM through transcriptional repression of DUSP6, thereby promoting HRR and ultimately inhibiting GC chemosensitivity to cisplatin. Collectively, these results indicate the specific mechanism of m6A-modified SUV39H2 as a histone methyltransferase promoting HRR to inhibit the chemosensitivity of GC. SUV39H2 is expected to become a key target in the precision targeted therapy of GC.
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Affiliation(s)
- Jing Yang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu Province, China
| | - Penghui Xu
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu Province, China
| | - Zetian Chen
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu Province, China
| | - Xing Zhang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu Province, China
| | - Yiwen Xia
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu Province, China
| | - Lang Fang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu Province, China
| | - Li Xie
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu Province, China
| | - Bowen Li
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu Province, China
| | - Zekuan Xu
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu Province, China; Collaborative Innovation Center for Cancer Personalized Medicine, Nanjing Medical University, Nanjing, Jiangsu Province, China; Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Personalized Cancer Medicine, Nanjing Medical University, China.
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Tanaka M, Harada H, Kimura H. The role of H3K9me3 in oral squamous cell carcinoma. Biochem Biophys Res Commun 2023; 640:56-63. [PMID: 36502632 DOI: 10.1016/j.bbrc.2022.11.102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 11/30/2022] [Indexed: 12/05/2022]
Abstract
Carcinogenesis is often associated with alteration of epigenetic marks, including histone modifications. The global level and local distribution of specific histone modifications have been revealed to be prognostic factors in many cancers. However, the functional roles of histone modifications in oral squamous cell carcinoma (OSCC) remain unclear. This study investigates the levels of various histone modifications in 6 types of OSCC cell lines. We found that the level of H3K9me3 was significantly high in metastatic cell lines. In addition, the loss of H3K9me3 by SUV39H1 and SUV39H2 knockdown suppressed cell proliferation and cell migration. Our results indicate that a high level of H3K9me3 could be a marker of metastasis and possibly a therapeutic target for OSCC treatment.
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Affiliation(s)
- Misako Tanaka
- Department of Oral and Maxillofacial Surgical Oncology, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo, 113-8510, Japan; School of Life Science and Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8501, Japan; Cell Biology Center, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan
| | - Hiroyuki Harada
- Department of Oral and Maxillofacial Surgical Oncology, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo, 113-8510, Japan
| | - Hiroshi Kimura
- School of Life Science and Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8501, Japan; Cell Biology Center, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan.
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Wang K, Zhu QZ, Ma XT, Cheng C. SUV39H2/KMT1B Inhibits the cardiomyocyte senescence phenotype by down-regulating BTG2/PC3. Aging (Albany NY) 2021; 13:22444-22458. [PMID: 34559682 PMCID: PMC8507256 DOI: 10.18632/aging.203551] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 08/24/2021] [Indexed: 04/08/2023]
Abstract
Suppressor of variegation 3-9 homolog 2 (SUV39H2/KMT1B), a member of the SUV39 subfamily of lysine methyltransferases (KMTs), functions as an oncogene in various types of cancers. Here, we demonstrate a novel function of SUV39H2 that drives the cardiomyocyte aging process through BTG2. In our study, cardiomyocyte aging was induced by H2O2 and aging cells exhibited increases in SUV39H2. Knockdown of SUV39H2 accelerated cardiomyocyte senescence, while overexpression of SUV39H2 inhibited the cardiomyocyte senescence phenotype. These effects of SUV39H2 on cardiomyocytes were independent of DNA damage and mitochondrial dysfunction. Interestingly, RNA sequencing and bioinformatics analyses identified a strong correlation between SUV39H2 and BTG2. In addition to this, BTG2 protein levels were significantly increased in SUV39H2-deficient cardiomyocytes, and BTG2 knockdown virtually rescued the cardiomyocyte senescence phenotype induced by SUV39H2 knockdown. Taken together, these results indicate that SUV39H2 protects cardiomyocytes from H2O2 exposure-induced oxidative stress, DNA damage, and mitochondrial dysfunction by regulating the p53-BTG2 pathway. Our findings provide evidence that the activation of SUV39H2 has therapeutic or preventive potential against cardiac aging.
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Affiliation(s)
- Kan Wang
- Division of Cardiothoracic and Vascular Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China
| | - Qiang Zhang Zhu
- Division of Cardiothoracic and Vascular Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Xian Tao Ma
- Division of Cardiothoracic and Vascular Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Cai Cheng
- Division of Cardiothoracic and Vascular Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
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Wang L, Chakraborty D, Iqbal K, Soares MJ. SUV39H2 controls trophoblast stem cell fate. Biochim Biophys Acta Gen Subj 2021; 1865:129867. [PMID: 33556426 PMCID: PMC8052280 DOI: 10.1016/j.bbagen.2021.129867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 12/31/2020] [Accepted: 02/01/2021] [Indexed: 11/21/2022]
Abstract
BACKGROUND The placenta is formed by the coordinated expansion and differentiation of trophoblast stem (TS) cells along a multi-lineage pathway. Dynamic regulation of histone 3 lysine 9 (H3K9) methylation is pivotal to cell differentiation for many cell lineages, but little is known about its involvement in trophoblast cell development. METHODS Expression of H3K9 methyltransferases was surveyed in rat TS cells maintained in the stem state and following differentiation. The role of suppressor of variegation 3-9 homolog 2 (SUV39H2) in the regulation of trophoblast cell lineage development was investigated using a loss-of-function approach in rat TS cells and ex vivo cultured rat blastocysts. RESULTS Among the twelve-known H3K9 methyltransferases, only SUV39H2 exhibited robust differential expression in stem versus differentiated TS cells. SUV39H2 transcript and protein expression were high in the stem state and declined as TS cells differentiated. Disruption of SUV39H2 expression in TS cells led to an arrest in TS cell proliferation and activation of trophoblast cell differentiation. SUV39H2 regulated H3K9 methylation status at loci exhibiting differentiation-dependent gene expression. Analyses of SUV39H2 on ex vivo rat blastocyst development supported its role in regulating TS cell expansion and differentiation. We further identified SUV39H2 as a downstream target of caudal type homeobox 2, a master regulator of trophoblast lineage development. CONCLUSIONS Our findings indicate that SUV39H2 contributes to the maintenance of TS cells and restrains trophoblast cell differentiation. GENERAL SIGNIFICANCE SUV39H2 serves as a contributor to the epigenetic regulation of hemochorial placental development.
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Affiliation(s)
- Lei Wang
- Institute for Reproduction and Perinatal Research, Department of Pathology & Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS, United States of America
| | - Damayanti Chakraborty
- Institute for Reproduction and Perinatal Research, Department of Pathology & Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS, United States of America
| | - Khursheed Iqbal
- Institute for Reproduction and Perinatal Research, Department of Pathology & Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS, United States of America
| | - Michael J Soares
- Institute for Reproduction and Perinatal Research, Department of Pathology & Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS, United States of America; Departments of Pediatrics and Obstetrics and Gynecology, University of Kansas Medical Center, Kansas City, KS, United States of America; Center for Perinatal Research, Children's Mercy Research Institute, Children's Mercy, Kansas City, MO, United States of America.
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Wang R, Cheng L, Yang X, Chen X, Miao Y, Qiu Y, Zhou Z. Histone methyltransferase SUV39H2 regulates cell growth and chemosensitivity in glioma via regulation of hedgehog signaling. Cancer Cell Int 2019; 19:269. [PMID: 31636512 PMCID: PMC6794832 DOI: 10.1186/s12935-019-0982-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 09/27/2019] [Indexed: 12/28/2022] Open
Abstract
Background Malignant glioma is one of the essentially incurable tumors with chemoresistance and tumor recurrence. As a histone methyltransferase, SUV39H2 can trimethylate H3K9. SUV39H2 is highly expressed in many types of human tumors, while the function of SUV39H2 in the development and progression of glioma has never been elucidated. Methods RT-qPCR and IHC were used to test SUV39H2 levels in glioma tissues and paired normal tissues. The clinical relevance of SUV39H2 in glioma was analyzed in a public database. Colony formation assays, CCK-8 assays, and flow cytometry were conducted to explore the role of SUV39H2 in the growth of glioma cells in vitro. A cell line-derived xenograft model was applied to explore SUV39H2’s role in U251 cell proliferation in vivo. Sphere formation assays, RT-qPCR, flow cytometry, and IF were conducted to illustrate the role of SUV39H2 in the stemness and chemosensitivity of glioma. Luciferase reporter assays and WB were applied to determine the function of SUV39H2 in Hh signaling. Results SUV39H2 was highly expressed in glioma tissues relative to normal tissues. SUV39H2 knockdown inhibited cell proliferation and stemness and promoted the chemosensitivity of glioma cells in vitro. In addition, SUV39H2 knockdown also significantly inhibited glioma cell growth in vivo. Moreover, we further uncovered that SUV39H2 regulated hedgehog signaling by repressing HHIP expression. Conclusions Our findings delineate the role of SUV39H2 in glioma cell growth and chemosensitivity as a pivotal regulator of the hedgehog signaling pathway and may support SUV39H2 as a potential target for diagnosis and therapy in glioma management.
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Affiliation(s)
- Ran Wang
- Department of Neurosurgery, South Campus, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Lilin Cheng
- Department of Neurosurgery, South Campus, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xi Yang
- Department of Neurosurgery, South Campus, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xin Chen
- Department of Neurosurgery, South Campus, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yifeng Miao
- Department of Neurosurgery, South Campus, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yongming Qiu
- Department of Neurosurgery, South Campus, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Zhiyi Zhou
- Department of Neurosurgery, South Campus, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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Kim AR, Sung JY, Rho SB, Kim YN, Yoon K. Suppressor of Variegation 3-9 Homolog 2, a Novel Binding Protein of Translationally Controlled Tumor Protein, Regulates Cancer Cell Proliferation. Biomol Ther (Seoul) 2019; 27:231-239. [PMID: 30763986 PMCID: PMC6430221 DOI: 10.4062/biomolther.2019.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 02/07/2019] [Accepted: 02/07/2019] [Indexed: 12/23/2022] Open
Abstract
Suppressor of Variegation 3-9 Homolog 2 (SUV39H2) methylates the lysine 9 residue of histone H3 and induces heterochromatin formation, resulting in transcriptional repression or silencing of target genes. SUV39H1 and SUV39H2 have a role in embryonic development, and SUV39H1 was shown to suppress cell cycle progression associated with Rb. However, the function of human SUV39H2 has not been extensively studied. We observed that forced expression of SUV39H2 decreased cell proliferation by inducing G1 cell cycle arrest. In addition, SUV39H2 was degraded through the ubiquitin-proteasomal pathway. Using yeast two-hybrid screening to address the degradation mechanism and function of SUV39H2, we identified translationally controlled tumor protein (TCTP) as an SUV39H2-interacting molecule. Mapping of the interacting regions indicated that the N-terminal 60 amino acids (aa) of full-length SUV39H2 and the C-terminus of TCTP (120-172 aa) were critical for binding. The interaction of SUV39H2 and TCTP was further confirmed by co-immunoprecipitation and immunofluorescence staining for colocalization. Moreover, depletion of TCTP by RNAi led to up-regulation of SUV39H2 protein, while TCTP overexpression reduced SUV39H2 protein level. The half-life of SUV39H2 protein was significantly extended upon TCTP depletion. These results clearly indicate that TCTP negatively regulates the expression of SUV39H2 post-translationally. Furthermore, SUV39H2 induced apoptotic cell death in TCTP-knockdown cells. Taken together, we identified SUV39H2, as a novel target protein of TCTP and demonstrated that SUV39H2 regulates cell proliferation of lung cancer cells.
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Affiliation(s)
- A-Reum Kim
- Division of Translational Science, Research Institute, National Cancer Center, Goyang 10408, Republic of Korea
| | - Jee Young Sung
- Division of Clinical Research, Research Institute, National Cancer Center, Goyang 10408, Republic of Korea
| | - Seung Bae Rho
- Division of Translational Science, Research Institute, National Cancer Center, Goyang 10408, Republic of Korea
| | - Yong-Nyun Kim
- Division of Translational Science, Research Institute, National Cancer Center, Goyang 10408, Republic of Korea
| | - Kyungsil Yoon
- Division of Translational Science, Research Institute, National Cancer Center, Goyang 10408, Republic of Korea
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Chao C, You J, Li H, Xue H, Tan X. Elevated SUV39H2 attributes to the progression of nasopharyngeal carcinoma via regulation of NRIP1. Biochem Biophys Res Commun 2019; 510:290-5. [PMID: 30709585 DOI: 10.1016/j.bbrc.2019.01.092] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Accepted: 01/18/2019] [Indexed: 01/02/2023]
Abstract
Nasopharyngeal carcinoma (NPC) is a prevalent tumor in southern China and southeast Asia. Recent studies have demonstrated that viral infection, somatic genetic changes, and epigenetic changes synergistically contribute to NPC pathogenesis. Genome-wide studies show that epigenetic aberrations likely drive nasopharyngeal carcinoma development and progression. This work is aimed at investigating the effect of histone methyltransferase SUV39H2 in NPC. The elevated expression of SUV39H2 in NPC is observed by analyzing GSE53819 and GSE12452 downloaded from the Gene Expression Omnibus (GEO) database. SUV39H2 knockdown inhibits NPC proliferation and induces the apoptosis of cancer cells. At last, RNaseq analysis identifies a variety of SUV39H2 downstream genes related with cancer, in which, NRIP1 is identified as a critical downstream target of SUV39H2 in NPC. Taken together, these findings provide a theoretical basis for understating the biological roles of SUV39H2 in NPC.
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11
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Abstract
Epigenetic modifications at the histone level have attracted significant attention because of their roles in tumorigenesis. Suppressor of variegation 3-9 homolog 2 (SUV39H2, also known as KMT1B) is a member of the SUV39 subfamily of lysine methyltransferases (KMTs) that plays a significant role in histone H3-K9 di-/tri-methylation, transcriptional regulation and cell cycle. Overexpressions of SUV39H2 at gene, mRNA and protein levels are known to be associated with a range of cancers: leukemia, lymphomas, lung cancer, breast cancer, colorectal cancer, gastric cancer, hepatocellular cancer and so on. Accumulating evidence indicates that SUV39H2 acts as an oncogene and contributes to the initiation and progression of cancers. It could, therefore, be a promising target for anti-cancer treatment. In this review, we focus on the dysregulation of SUV39H2 in cancers, including its clinical prognostic predictor role, molecular mechanism involved in cancer occurrence and development, relevant inhibitors against cancer, and its epigenetic modification interaction with immunotherapy. A better understanding of the SUV39H2 will be beneficial to the development of molecular-targeted therapies in cancer.
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Affiliation(s)
- Baihui Li
- Department of Immunology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.,National Clinical Research Center for Cancer, Tianjin, China.,Key Laboratory of Cancer Prevention and Therapy, Tianjin, China.,Tianjin's Clinical Research Center for Cancer, Tianjin, China.,Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, China
| | - Yu Zheng
- Department of Immunology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.,National Clinical Research Center for Cancer, Tianjin, China.,Key Laboratory of Cancer Prevention and Therapy, Tianjin, China.,Tianjin's Clinical Research Center for Cancer, Tianjin, China.,Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, China
| | - Lili Yang
- Department of Immunology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.,National Clinical Research Center for Cancer, Tianjin, China.,Key Laboratory of Cancer Prevention and Therapy, Tianjin, China.,Tianjin's Clinical Research Center for Cancer, Tianjin, China.,Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, China
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12
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Vougiouklakis T, Saloura V, Park JH, Takamatsu N, Miyamoto T, Nakamura Y, Matsuo Y. Development of novel SUV39H2 inhibitors that exhibit growth suppressive effects in mouse xenograft models and regulate the phosphorylation of H2AX. Oncotarget 2018; 9:31820-31831. [PMID: 30159125 PMCID: PMC6112750 DOI: 10.18632/oncotarget.25806] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Accepted: 06/01/2018] [Indexed: 01/21/2023] Open
Abstract
Protein methyltransferase SUV39H2 was reported to methylate histone H2AX at lysine 134 and enhance the formation of phosphorylated H2AX (γ-H2AX), which causes chemoresistance of cancer cells. We found that a series of imidazo[1,2-a]pyridine compounds that we synthesized could inhibit SUV39H2 methyltransferase activity. One of the potent compounds, OTS193320, was further analyzed in in vitro studies. The compound decreased global histone H3 lysine 9 tri-methylation levels in breast cancer cells and triggered apoptotic cell death. Combination of OTS193320 with doxorubicin (DOX) resulted in reduction of γ-H2AX levels as well as cancer cell viability compared to a single agent OTS193320 or DOX. Further optimization of inhibitors and their in vivo analysis identified a compound, OTS186935, which revealed significant inhibition of tumor growth in mouse xenograft models using MDA-MB-231 breast cancer cells and A549 lung cancer cells without any detectable toxicity. Our results suggest that the SUV39H2 inhibitors sensitize cancer cells to DOX by reduction of γ-H2AX levels in cancer cells, and collectively demonstrate that SUV39H2 inhibition warrants further investigation as a novel anti-cancer therapy.
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Affiliation(s)
- Theodore Vougiouklakis
- Section of Hematology/Oncology, Department of Medicine, The University of Chicago, Chicago, IL, USA
| | - Vassiliki Saloura
- Section of Hematology/Oncology, Department of Medicine, The University of Chicago, Chicago, IL, USA
| | - Jae-Hyun Park
- Section of Hematology/Oncology, Department of Medicine, The University of Chicago, Chicago, IL, USA
| | | | | | - Yusuke Nakamura
- Section of Hematology/Oncology, Department of Medicine, The University of Chicago, Chicago, IL, USA.,Department of Surgery, The University of Chicago, Chicago, IL, USA
| | - Yo Matsuo
- OncoTherapy Science Inc., Kawasaki, Japan
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13
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Shuai W, Wu J, Chen S, Liu R, Ye Z, Kuang C, Fu X, Wang G, Li Y, Peng Q, Shi W, Li Y, Zhou Q, Huang W. SUV39H2 promotes colorectal cancer proliferation and metastasis via tri-methylation of the SLIT1 promoter. Cancer Lett 2018; 422:56-69. [PMID: 29458143 DOI: 10.1016/j.canlet.2018.02.023] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 01/30/2018] [Accepted: 02/12/2018] [Indexed: 01/01/2023]
Abstract
Suppressor of variegation 3-9 homolog 2 (SUV39H2) is a member of the SUV39H subfamily of lysine methyltransferases. Its role in colorectal cancer (CRC) proliferation and metastasis has remained unexplored. Here, we determined that SUV39H2 was upregulated in CRC tissues compared with that in adjacent non-neoplastic tissues. Further statistical analysis revealed that high SUV39H2 expression was strongly associated with distant metastasis (P = 0.016) and TNM stage (P = 0.038) and predicted a shorter overall survival (OS; P = 0.018) and progression-free survival (PFS; P = 0.018) time for CRC patients. Both in vitro and in vivo assays demonstrated that ectopically expressed SUV39H2 enhanced CRC proliferation and metastasis, while SUV39H2 knockdown inhibited CRC proliferation and metastasis. A molecular screen of SUV39H2 targets found that SUV39H2 negatively regulated the expression of SLIT guidance ligand 1 (SLIT1). Moreover, rescue assays suggested that SLIT1 could antagonize the function of SUV39H2 in CRC. Mechanistic studies indicated that SUV39H2 can directly bind to the SLIT1 promoter, suppressing SLIT1 transcription by catalyzing histone H3 lysine 9 (H3K9) tri-methylation. In summary, we propose that SUV39H2 can predict CRC patient prognosis and stimulate CRC malignant phenotypes via SLIT1 promoter tri-methylation.
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14
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Piao L, Nakakido M, Suzuki T, Dohmae N, Nakamura Y, Hamamoto R. Automethylation of SUV39H2, an oncogenic histone lysine methyltransferase, regulates its binding affinity to substrate proteins. Oncotarget 2017; 7:22846-56. [PMID: 26988914 PMCID: PMC5008405 DOI: 10.18632/oncotarget.8072] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 02/25/2016] [Indexed: 12/14/2022] Open
Abstract
We previously reported that the histone lysine methyltransferase SUV39H2, which is overexpressed in various types of human cancer, plays a critical role in the DNA repair after double strand breakage, and possesses oncogenic activity. Although its biological significance in tumorigenesis has been elucidated, the regulatory mechanism of SUV39H2 activity through post-translational modification is not well known. In this study, we demonstrate in vitro and in vivo automethylation of SUV39H2 at lysine 392. Automethylation of SUV39H2 led to impairment of its binding affinity to substrate proteins such as histone H3 and LSD1. Furthermore, we observed that hyper-automethylated SUV39H2 reduced methylation activities to substrates through affecting the binding affinity to substrate proteins. Our finding unveils a novel autoregulatory mechanism of SUV39H2 through lysine automethylation.
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Affiliation(s)
- Lianhua Piao
- Section of Hematology/Oncology, Department of Medicine, The University of Chicago, Chicago, IL 60637, USA
| | - Makoto Nakakido
- Section of Hematology/Oncology, Department of Medicine, The University of Chicago, Chicago, IL 60637, USA
| | - Takehiro Suzuki
- Biomolecular Characterization Unit, RIKEN Center for Sustainable Resource Science, Wako, Saitama 351-0198, Japan
| | - Naoshi Dohmae
- Biomolecular Characterization Unit, RIKEN Center for Sustainable Resource Science, Wako, Saitama 351-0198, Japan
| | - Yusuke Nakamura
- Section of Hematology/Oncology, Department of Medicine, The University of Chicago, Chicago, IL 60637, USA
| | - Ryuji Hamamoto
- Section of Hematology/Oncology, Department of Medicine, The University of Chicago, Chicago, IL 60637, USA.,Division of Molecular Modification and Cancer Biology, National Cancer Center, Chuo-ku, Tokyo 104-0045, Japan
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15
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Askew EB, Bai S, Parris AB, Minges JT, Wilson EM. Androgen receptor regulation by histone methyltransferase Suppressor of variegation 3-9 homolog 2 and Melanoma antigen-A11. Mol Cell Endocrinol 2017; 443:42-51. [PMID: 28042025 PMCID: PMC5303141 DOI: 10.1016/j.mce.2016.12.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 12/13/2016] [Accepted: 12/28/2016] [Indexed: 11/22/2022]
Abstract
Androgen receptor (AR) transcriptional activity depends on interactions between the AR NH2-terminal region and transcriptional coregulators. A yeast two-hybrid screen of a human testis library using predicted α-helical NH2-terminal fragment AR-(370-420) as bait identified suppressor of variegation 3-9 homolog 2 (SUV39H2) histone methyltransferase as an AR interacting protein. SUV39H2 interaction with AR and the AR coregulator, melanoma antigen-A11 (MAGE-A11), was verified in two-hybrid, in vitro glutathione S-transferase affinity matrix and coimmunoprecipitation assays. Fluorescent immunocytochemistry colocalized SUV39H2 and AR in the cytoplasm without androgen, in the nucleus with androgen, and with MAGE-A11 in the nucleus independent of androgen. Chromatin immunoprecipitation using antibodies raised against SUV39H2 demonstrated androgen-dependent recruitment of AR and SUV39H2 to the androgen-responsive upstream enhancer of the prostate-specific antigen gene. SUV39H2 functioned cooperatively with MAGE-A11 to increase androgen-dependent AR transcriptional activity. SUV39H2 histone methyltransferase is an AR coactivator that increases androgen-dependent transcriptional activity through interactions with AR and MAGE-A11.
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Affiliation(s)
- Emily B Askew
- Laboratories for Reproductive Biology, Department of Pediatrics, Lineberger Comprehensive Cancer Center, and Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC 27599, United States
| | - Suxia Bai
- Laboratories for Reproductive Biology, Department of Pediatrics, Lineberger Comprehensive Cancer Center, and Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC 27599, United States
| | - Amanda B Parris
- Laboratories for Reproductive Biology, Department of Pediatrics, Lineberger Comprehensive Cancer Center, and Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC 27599, United States
| | - John T Minges
- Laboratories for Reproductive Biology, Department of Pediatrics, Lineberger Comprehensive Cancer Center, and Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC 27599, United States
| | - Elizabeth M Wilson
- Laboratories for Reproductive Biology, Department of Pediatrics, Lineberger Comprehensive Cancer Center, and Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC 27599, United States.
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16
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Schuhmacher MK, Kudithipudi S, Jeltsch A. Investigation of H2AX methylation by the SUV39H2 protein lysine methyltransferase. FEBS Lett 2016; 590:1713-9. [PMID: 27177470 DOI: 10.1002/1873-3468.12216] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 04/29/2016] [Accepted: 05/05/2016] [Indexed: 12/21/2022]
Abstract
The H3K9 protein lysine methyltransferase SUV39H2 was reported to methylate K134 of H2AX and stimulate H2AX phosphorylation during DNA damage response [Sone K et al. (2014) Nat Commun 5, 5691]. However, the sequence context of H2AX-K134 differs from the specificity of SUV39H2. We performed in vitro methylation reactions with SUV39H2 (and its homolog SUV39H1) using H2AX protein and peptides, but no methylation at K134 or any other lysine in H2AX was detected. Positive controls demonstrated the functionality of the assays. While our data cannot finally exclude H2AX methylation of SUV39H2 in cells, additional experimental evidence is required to validate this claim.
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Affiliation(s)
| | | | - Albert Jeltsch
- Institute of Biochemistry, Stuttgart University, Germany
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17
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Piao L, Suzuki T, Dohmae N, Nakamura Y, Hamamoto R. SUV39H2 methylates and stabilizes LSD1 by inhibiting polyubiquitination in human cancer cells. Oncotarget 2016; 6:16939-50. [PMID: 26183527 PMCID: PMC4627283 DOI: 10.18632/oncotarget.4760] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2015] [Accepted: 06/26/2015] [Indexed: 11/25/2022] Open
Abstract
LSD1 is a histone lysine demethylase, which is highly expressed in multiple types of human cancer. Although its roles in transcriptional regulation have been well-studied, functional regulation of LSD1 by post-translational modifications still remains unknown. Here, we demonstrate that the histone lysine methyltransferase SUV39H2 trimethylated LSD1 on lysine 322. Knockdown of SUV39H2 resulted in a decrease of LSD1 protein even though the mRNA levels were unchanged. SUV39H2-induced LSD1 methylation suppresses LSD1 polyubiquitination and subsequent degradation. In addition, we also observed indirect effect of SUV39H2 overexpression on LSD1-target genes. Our results reveal the regulatory mechanism of LSD1 protein through its lysine methylation by SUV39H2 in human cancer cells.
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Affiliation(s)
- Lianhua Piao
- Section of Hematology/Oncology, Department of Medicine, The University of Chicago, Chicago, IL, USA
| | - Takehiro Suzuki
- Biomolecular Characterizaion Unit, RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan
| | - Naoshi Dohmae
- Biomolecular Characterizaion Unit, RIKEN Center for Sustainable Resource Science, Wako, Saitama, Japan
| | - Yusuke Nakamura
- Section of Hematology/Oncology, Department of Medicine, The University of Chicago, Chicago, IL, USA
| | - Ryuji Hamamoto
- Section of Hematology/Oncology, Department of Medicine, The University of Chicago, Chicago, IL, USA
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18
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Zhang S, Wang F, Fan C, Tang B, Zhang X, Li Z. Dynamic changes of histone H3 lysine 9 following trimethylation in bovine oocytes and pre-implantation embryos. Biotechnol Lett 2015; 38:395-402. [PMID: 26588904 DOI: 10.1007/s10529-015-2001-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 11/09/2015] [Indexed: 11/30/2022]
Abstract
OBJECTIVES We have examined dynamic changes of histone H3 lysine 9 following trimethylation (H3K9me3), the mRNA expression levels of SUV39H1 and SUV39H2 in bovine oocytes and the role in the development of in vitro fertilization (IVF) pre-implantation embryos. RESULTS There were strong H3K9me3 signals in germinal vesicle (GV) oocytes but no signals in MII oocytes. H3K9me3 signals were maintained during IVF pre-implantation embryo development. SUV39H1 and SUV39H2 showed significantly higher mRNA expression levels in GV oocytes than MII oocytes (P < 0.01). SUV39H1 showed high mRNA expression level in two-cell embryos, however, SUV39H2 showed high mRNA expression level in four-cell embryos. In other development stage, SUV39H1 and SUV39H2 showed low expression levels. CONCLUSION Bovine IVF pre-implantation embryos maintain strong H3K9me3 signals and SUV39H1 and SUV39H2 are highly expressed at the early development stage of pre-implantation embryos.
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Affiliation(s)
- Sheng Zhang
- College of Animal Science, Jilin University, Changchun, Jilin, 130062, China.
| | - Fang Wang
- College of Veterinary Medicine, Jilin University, Changchun, Jilin, 130062, China.
| | - Congli Fan
- College of Veterinary Medicine, Jilin University, Changchun, Jilin, 130062, China.
| | - Bo Tang
- College of Veterinary Medicine, Jilin University, Changchun, Jilin, 130062, China.
| | - Xueming Zhang
- College of Veterinary Medicine, Jilin University, Changchun, Jilin, 130062, China.
| | - Ziyi Li
- College of Animal Science, Jilin University, Changchun, Jilin, 130062, China. .,State & Local Joint Engineering Laboratory for Animal Models of Human Diseases, Academy of Translational Medicine, First Hospital, Jilin University, Changchun, Jilin, 130061, China.
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