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Liu Z, Chen X, Zhang P, Li F, Zhang L, Li X, Huang T, Zheng Y, Yu T, Zhang T, Zeng W, Lu H, Lv Y. Transcriptome-wide Dynamics of m 6A mRNA Methylation During Porcine Spermatogenesis. GENOMICS, PROTEOMICS & BIOINFORMATICS 2023; 21:729-741. [PMID: 34543723 PMCID: PMC10787014 DOI: 10.1016/j.gpb.2021.08.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 07/31/2021] [Accepted: 09/09/2021] [Indexed: 10/20/2022]
Abstract
Spermatogenesis is a continual process that occurs in the testes, in which diploid spermatogonial stem cells (SSCs) differentiate and generate haploid spermatozoa. This highly efficient and intricate process is orchestrated at multiple levels. N6-methyladenosine (m6A), an epigenetic modification prevalent in mRNAs, is implicated in the transcriptional regulation during spermatogenesis. However, the dynamics of m6A modification in non-rodent mammalian species remains unclear. Here, we systematically investigated the profile and role of m6A during spermatogenesis in pigs. By analyzing the transcriptomic distribution of m6A in spermatogonia, spermatocytes, and round spermatids, we identified a globally conserved m6A pattern between porcine and murine genes with spermatogenic function. We found that m6A was enriched in a group of genes that specifically encode the metabolic enzymes and regulators. In addition, transcriptomes in porcine male germ cells could be subjected to the m6A modification. Our data show that m6A plays the regulatory roles during spermatogenesis in pigs, which is similar to that in mice. Illustrations of this point are three genes (SETDB1, FOXO1, and FOXO3) that are crucial to the determination of the fate of SSCs. To the best of our knowledge, this study for the first time uncovers the expression profile and role of m6A during spermatogenesis in large animals and provides insights into the intricate transcriptional regulation underlying the lifelong male fertility in non-rodent mammalian species.
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Affiliation(s)
- Zidong Liu
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Xiaoxu Chen
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Pengfei Zhang
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Fuyuan Li
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Lingkai Zhang
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Xueliang Li
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Tao Huang
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Yi Zheng
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Taiyong Yu
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Tao Zhang
- School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723001, China
| | - Wenxian Zeng
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China.
| | - Hongzhao Lu
- School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723001, China.
| | - Yinghua Lv
- College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, China.
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Yurttas AG, Okat Z, Elgun T, Cifci KU, Sevim AM, Gul A. Genetic deviation associated with photodynamic therapy in HeLa cell. Photodiagnosis Photodyn Ther 2023; 42:103346. [PMID: 36809810 DOI: 10.1016/j.pdpdt.2023.103346] [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: 11/18/2022] [Revised: 02/05/2023] [Accepted: 02/14/2023] [Indexed: 02/22/2023]
Abstract
Photodynamic therapy (PDT) is a method that is used in cancer treatment. The main therapeutic effect is the production of singlet oxygen (1O2). Phthalocyanines for PDT produce high singlet oxygen with absorbers of about 600-700 nm. AIM It is aimed to analyze cancer cell pathways by flow cytometry analysis and cancer-related genes with q-PCR device by applying phthalocyanine L1ZnPC, which we use as photosensitizer in photodynamic therapy, in HELA cell line. In this study, we investigate the molecular basis of L1ZnPC's anti-cancer activity. MATERIAL METHOD The cytotoxic effects of L1ZnPC, a phthalocyanine obtained from our previous study, in HELA cells were evaluated and it was determined that it led to a high rate of death as a result. The result of photodynamic therapy was analyzed using q-PCR. From the data received at the conclusion of this investigation, gene expression values were calculated, and expression levels were assessed using the 2-∆∆Ct method to examine the relative changes in these values. Cell death pathways were interpreted with the FLOW cytometer device. One-Way Analysis of Variance (ANOVA) and the Tukey-Kramer Multiple Comparison Test with Post-hoc Test were used for the statistical analysis. CONCLUSION In our study, it was observed that HELA cancer cells underwent apoptosis at a rate of 80% with drug application plus photodynamic therapy by flow cytometry method. According to q-PCR results, CT values of eight out of eighty-four genes were found to be significant and their association with cancer was evaluated. L1ZnPC is a new phthalocyanine used in this study and our findings should be supported by further studies. For this reason, different analyses are needed to be performed with this drug in different cancer cell lines. In conclusion, according to our results, this drug looks promising but still needs to be analyzed through new studies. It is necessary to examine in detail which signaling pathways they use and their mechanism of action. For this, additional experiments are required.
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Affiliation(s)
- Asiye Gok Yurttas
- Department of Biochemistry, Faculty of Pharmacy, Istanbul Health and Technology University, Istanbul, Turkey.
| | - Zehra Okat
- Department of Biochemistry, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Tugba Elgun
- Medical Biology, Faculty of Medicine, Istanbul Biruni University, Istanbul, Turkey
| | - Kezban Ucar Cifci
- Division of Basic Sciences and Health, Hemp Research Institute, Yozgat Bozok University, Yozgat, Turkey; Department of Molecular Medicine, Institute of Health Sciences, University of Health Sciences, Turkey
| | - Altug Mert Sevim
- Department of Chemistry, Istanbul Technical University, Istanbul, Turkey
| | - Ahmet Gul
- Department of Chemistry, Istanbul Technical University, Istanbul, Turkey
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Li T, Zheng Y, Li T, Guo M, Wu X, Liu R, Liu Q, You X, Zeng W, Lv Y. Potential dual protective effects of melatonin on spermatogonia against hexavalent chromium. Reprod Toxicol 2022; 111:92-105. [DOI: 10.1016/j.reprotox.2022.05.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/06/2022] [Accepted: 05/16/2022] [Indexed: 01/18/2023]
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Liu R, Liu Z, Guo M, Zeng W, Zheng Y. SETDB1 Regulates Porcine Spermatogonial Adhesion and Proliferation through Modulating MMP3/10 Transcription. Cells 2022; 11:cells11030370. [PMID: 35159180 PMCID: PMC8834347 DOI: 10.3390/cells11030370] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 12/30/2021] [Accepted: 01/20/2022] [Indexed: 12/16/2022] Open
Abstract
The transition from gonocytes into spermatogonia takes place during the homing process. A subpopulation of undifferentiated spermatogonia in niche then shifts to spermatogonial stem cells (SSCs), accompanied by the self-renewal ability to maintain life-long fertility in males. Enormous changes in cell morphology, gene expression, and epigenetic features have been reported during spermatogenesis. However, little is known about the difference of these features in SSCs during aging. Here, we examined the dynamics of SET domain bifurcated 1 (SETDB1) expression in porcine testes. SETDB1 was expressed in postnatal undifferentiated spermatogonia, while gradually disappeared after being packed within the basal compartment of seminiferous tubules. In addition, the cell-adhesion ability, proliferative activity, and trimethylation of the histone H3 lysine 9 (H3K9me3) level were significantly altered in SETDB1-deficient porcine SSCs. Moreover, the matrix metalloproteinases 3/10 (MMP3/10) was upregulated at both mRNA and protein levels. These results illustrate the significance of SETDB1 in modulating early male germ cell development.
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Liu T, Xu P, Ke S, Dong H, Zhan M, Hu Q, Li J. Histone methyltransferase SETDB1 inhibits TGF-β-induced epithelial-mesenchymal transition in pulmonary fibrosis by regulating SNAI1 expression and the ferroptosis signaling pathway. Arch Biochem Biophys 2022; 715:109087. [PMID: 34801472 DOI: 10.1016/j.abb.2021.109087] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 11/15/2021] [Accepted: 11/15/2021] [Indexed: 12/12/2022]
Abstract
The epithelial-mesenchymal transition (EMT) is an important pathological process in the occurrence of pulmonary fibrosis. Changes in histone methylation modifications of key genes play an important role in this process. As a histone methyltransferase, the regulatory mechanism and role of SET domain bifurcated 1 (SETDB1) in pulmonary fibrosis remain unclear. We found that SETDB1 inhibited EMT and that cells attenuated the expression of SETDB1 to relieve this inhibition during transforming growth factor-β (TGF-β)-induced EMT. Silencing SETDB1 expression significantly enhanced the mesenchymal phenotype induced by TGF-β and the expression and deposition of fibronectin and significantly reduced the expression of E-cadherin. The decrease in E-cadherin expression and the induction of EMT led to increased lipid reactive oxygen species (ROS) and ferrous ions, which induced ferroptosis. Chromatin immunoprecipitation (ChIP) results showed that SETDB1 regulates the expression of Snai1 by catalyzing the histone H3 lysine 9 trimethylation (H3K9me3) of Snai1, the main transcription factor that initiates the process of EMT, and thus, indirectly regulates E-cadherin. Surprisingly, when examining the effect of overexpressed SETDB1 on EMT, we found that overexpressed SETDB1 alleviated EMT and also caused ferroptosis. We suggest that the overexpression of SETDB1 partially reverses the mesenchymal phenotype to an epithelial state, while those cells that fail to reverse are depleted by ferroptosis. In conclusion, the histone methylase SETDB1 regulates Snai1 epigenetically, driving EMT gene reprogramming and ferroptosis in response to TGF-β. However, there are unexplored links between the epigenetic reprogramming and transcriptional processes that regulate EMT in a TGF-β-dependent manner.
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Affiliation(s)
- Tiantian Liu
- Henan Key Laboratory of Chinese Medicine for Respiratory Disease, Henan University of Chinese Medicine, Zhengzhou, Henan, 450046, China; Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, Henan, 450046, China; Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases By Henan & Education Ministry of PR China, Zhengzhou, Henan, 450046, China
| | - Pengli Xu
- Henan Key Laboratory of Chinese Medicine for Respiratory Disease, Henan University of Chinese Medicine, Zhengzhou, Henan, 450046, China; Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, Henan, 450046, China; Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases By Henan & Education Ministry of PR China, Zhengzhou, Henan, 450046, China
| | - Shaorui Ke
- Henan Key Laboratory of Chinese Medicine for Respiratory Disease, Henan University of Chinese Medicine, Zhengzhou, Henan, 450046, China; Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, Henan, 450046, China; Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases By Henan & Education Ministry of PR China, Zhengzhou, Henan, 450046, China
| | - Haoran Dong
- Henan Key Laboratory of Chinese Medicine for Respiratory Disease, Henan University of Chinese Medicine, Zhengzhou, Henan, 450046, China; Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, Henan, 450046, China; Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases By Henan & Education Ministry of PR China, Zhengzhou, Henan, 450046, China
| | - Mengmeng Zhan
- Henan Key Laboratory of Chinese Medicine for Respiratory Disease, Henan University of Chinese Medicine, Zhengzhou, Henan, 450046, China; Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, Henan, 450046, China; Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases By Henan & Education Ministry of PR China, Zhengzhou, Henan, 450046, China
| | - Qin Hu
- Henan Key Laboratory of Chinese Medicine for Respiratory Disease, Henan University of Chinese Medicine, Zhengzhou, Henan, 450046, China; Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, Henan, 450046, China; Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases By Henan & Education Ministry of PR China, Zhengzhou, Henan, 450046, China
| | - Jiansheng Li
- Henan Key Laboratory of Chinese Medicine for Respiratory Disease, Henan University of Chinese Medicine, Zhengzhou, Henan, 450046, China; Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, Henan, 450046, China; Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases By Henan & Education Ministry of PR China, Zhengzhou, Henan, 450046, China.
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Cai H, Jiang Y, Zhang S, Cai NN, Zhu WQ, Yang R, Tang B, Li ZY, Zhang XM. Culture bovine prospermatogonia with 2i medium. Andrologia 2021; 53:e14056. [PMID: 33763906 DOI: 10.1111/and.14056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 01/28/2021] [Accepted: 03/09/2021] [Indexed: 12/31/2022] Open
Abstract
Germplasm cryopreservation and expansion of gonocytes/prospermatogonia or spermatogonial stem cells (SSCs) are important; however, it's difficult in cattle. Since inhibitors of Mek1/2 and Gsk3β (2i) can enhance pluripotency maintenance, effects of 2i-based medium on the cultivation of bovine prospermatogonia from the cryopreserved tissues were examined. The testicular tissues of newborn bulls were well cryopreserved. High mRNA levels of prospermatogonium/SSC markers (PLZF, GFRα-1) and pluripotency markers (Oct4/Pouf5, Sox2, Nanog) were detected and the PLZF+ /GFRα-1+ prospermatogonia were consistently identified immunohistochemically in the seminiferous cords. Using differential plating and Percoll-based centrifugation, 41.59% prospermatogonia were enriched and they proliferated robustly in 2i medium. The 2i medium boosted mRNA abundances of Pouf5, Sox2, Nanog, GFRα-1, PLZF, anti-apoptosis gene Bcl2, LIF receptor gene LIFR and enhanced PLZF protein expression, but suppressed mRNA expressions of spermatogonial differentiation marker c-kit and pro-apoptotic gene Bax, in the cultured prospermatogonia. It also alleviated H2 O2 -induced apoptosis of the enriched cells and decreased histone H3 lysine (K9) trimethylation (H3K9me3) and its methylase Suv39h1/2 mRNA level in the cultured seminiferous cords. Overall, 2i medium improves the cultivation of bovine prospermatogonia isolated from the cryopreserved testes, by inhibiting Suv39h1/2-mediated H3K9me3 through Mek1/2 and Gsk3β signalling, evidencing successful cryopreservation and expansion of bovine germplasm.
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Affiliation(s)
- Huan Cai
- College of Veterinary Medicine, Jilin University, Changchun, China
| | - Yu Jiang
- College of Veterinary Medicine, Jilin University, Changchun, China
| | - Sheng Zhang
- First Bethune Hospital, Jilin University, Changchun, China
| | - Ning-Ning Cai
- College of Veterinary Medicine, Jilin University, Changchun, China
| | - Wen-Qian Zhu
- College of Veterinary Medicine, Jilin University, Changchun, China
| | - Rui Yang
- College of Veterinary Medicine, Jilin University, Changchun, China
| | - Bo Tang
- College of Veterinary Medicine, Jilin University, Changchun, China
| | - Zi-Yi Li
- First Bethune Hospital, Jilin University, Changchun, China
| | - Xue-Ming Zhang
- College of Veterinary Medicine, Jilin University, Changchun, China
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Li X, Chen X, Liu Y, Zhang P, Zheng Y, Zeng W. The Histone Methyltransferase SETDB1 Modulates Survival of Spermatogonial Stem/Progenitor Cells Through NADPH Oxidase. Front Genet 2020; 11:997. [PMID: 33133132 PMCID: PMC7567028 DOI: 10.3389/fgene.2020.00997] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Accepted: 08/05/2020] [Indexed: 12/16/2022] Open
Abstract
SETDB1, a histone H3 lysine 9 (H3K9) methyltransferase, is crucial in meiosis and embryo development. This study aimed to investigate whether SETDB1 was associated with spermatogonial stem cells (SSC) homeostasis. We found that knockdown of Setdb1 impaired cell proliferation, led to an increase in reactive oxygen species (ROS) level through NADPH oxidase, and Setdb1 deficiency activated ROS downstream signaling pathways, including JNK and p38 MAPK, which possibly contributed to SSC apoptosis. Melatonin scavenged ROS and rescued the phenotype of Setdb1 KD. In addition, we demonstrated that SETDB1 regulated NADPH oxidase 4 (Nox4) and E2F1. Therefore, this study uncovers the new roles of SETDB1 in mediating intracellular ROS homeostasis for the survival of SSC.
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Affiliation(s)
- Xueliang Li
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Xiaoxu Chen
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Yingdong Liu
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Pengfei Zhang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Yi Zheng
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Wenxian Zeng
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
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Zhou S, Feng S, Qin W, Wang X, Tang Y, Yuan S. Epigenetic Regulation of Spermatogonial Stem Cell Homeostasis: From DNA Methylation to Histone Modification. Stem Cell Rev Rep 2020; 17:562-580. [PMID: 32939648 DOI: 10.1007/s12015-020-10044-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/11/2020] [Indexed: 12/27/2022]
Abstract
Spermatogonial stem cells(SSCs)are the ultimate germline stem cells with the potential of self-renewal and differentiation, and a dynamic balance of SSCs play an essential role in spermatogenesis. During the gene expression process, genomic DNA and nuclear protein, working together, contribute to SSC homeostasis. Recently, emerging studies have shown that epigenome-related molecules such as chromatin modifiers play an important role in SSC homeostasis through regulating target gene expression. Here, we focus on two types of epigenetic events, including DNA methylation and histone modification, and summarize their function in SSC homeostasis. Understanding the molecular mechanism during SSC homeostasis will promote the recognition of epigenetic biomarkers in male infertility, and bring light into therapies of infertile patients.Graphical Abstract.
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Affiliation(s)
- Shumin Zhou
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, China
| | - Shenglei Feng
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, China
| | - Weibing Qin
- NHC Key Laboratory of Male Reproduction and Genetics, Family Planning Research Institute of Guangdong Province, 510500, Guangzhou, China
| | - Xiaoli Wang
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, China
| | - Yunge Tang
- NHC Key Laboratory of Male Reproduction and Genetics, Family Planning Research Institute of Guangdong Province, 510500, Guangzhou, China.
| | - Shuiqiao Yuan
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, China. .,Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen, 518057, China.
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Tatehana M, Kimura R, Mochizuki K, Inada H, Osumi N. Comprehensive histochemical profiles of histone modification in male germline cells during meiosis and spermiogenesis: Comparison of young and aged testes in mice. PLoS One 2020; 15:e0230930. [PMID: 32267870 PMCID: PMC7141650 DOI: 10.1371/journal.pone.0230930] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 03/12/2020] [Indexed: 12/11/2022] Open
Abstract
Human epidemiological studies have shown that paternal aging as one of the risk factors for neurodevelopmental disorders, such as autism, in offspring. A recent study has suggested that factors other than de novo mutations due to aging can influence the biology of offspring. Here, we focused on epigenetic alterations in sperm that can influence developmental programs in offspring. In this study, we qualitatively and semiquantitatively evaluated histone modification patterns in male germline cells throughout spermatogenesis based on immunostaining of testes taken from young (3 months old) and aged (12 months old) mice. Although localization patterns were not obviously changed between young and aged testes, some histone modification showed differences in their intensity. Among histone modifications that repress gene expression, histone H3 lysine 9 trimethylation (H3K9me3) was decreased in the male germline cells of the aged testis, while H3K27me2/3 was increased. The intensity of H3K27 acetylation (ac), an active mark, was lower/higher depending on the stages in the aged testis. Interestingly, H3K27ac was detected on the putative sex chromosomes of round spermatids, while other chromosomes were occupied by a repressive mark, H3K27me3. Among other histone modifications that activate gene expression, H3K4me2 was drastically decreased in the male germline cells of the aged testis. In contrast, H3K79me3 was increased in M-phase spermatocytes, where it accumulates on the sex chromosomes. Therefore, aging induced alterations in the amount of histone modifications and in the differences of patterns for each modification. Moreover, histone modifications on the sex chromosomes and on other chromosomes seems to be differentially regulated by aging. These findings will help elucidate the epigenetic mechanisms underlying the influence of paternal aging on offspring development.
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Affiliation(s)
- Misako Tatehana
- Department of Developmental Neuroscience, Center for Advanced Research and Translational Medicine (ART), Tohoku University School of Medicine, Sendai, Japan
| | - Ryuichi Kimura
- Department of Developmental Neuroscience, Center for Advanced Research and Translational Medicine (ART), Tohoku University School of Medicine, Sendai, Japan
| | - Kentaro Mochizuki
- Department of Developmental Neuroscience, Center for Advanced Research and Translational Medicine (ART), Tohoku University School of Medicine, Sendai, Japan
- Department of Medical Genetics, Life Sciences Institute, The University of British Columbia, Vancouver, BC, Canada
| | - Hitoshi Inada
- Department of Developmental Neuroscience, Center for Advanced Research and Translational Medicine (ART), Tohoku University School of Medicine, Sendai, Japan
| | - Noriko Osumi
- Department of Developmental Neuroscience, Center for Advanced Research and Translational Medicine (ART), Tohoku University School of Medicine, Sendai, Japan
- * E-mail:
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Li T, Chen Q, Zheng Y, Zhang P, Chen X, Lu J, Lv Y, Sun S, Zeng W. PAMAM-cRGD mediating efficient siRNA delivery to spermatogonial stem cells. Stem Cell Res Ther 2019; 10:399. [PMID: 31852526 PMCID: PMC6921429 DOI: 10.1186/s13287-019-1506-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 11/15/2019] [Accepted: 11/20/2019] [Indexed: 01/15/2023] Open
Abstract
Background Spermatogonial stem cells (SSCs) are the cornerstone of sperm production and thus perpetual male fertility. In clinics, transplantation of patient’s own SSCs into testes is a promising technique to restore fertility when male germ cells have been depleted by gonadotoxic therapies. Auto-transplantation of genetically modified SSCs even has the potential to treat male infertility caused by genetic mutations. However, SSCs are refractory to transfection approaches. Poly(amidoamine) (PAMAM) dendrimers have the unique three-dimensional architecture, surface charge, and high density of surface groups that are suitable for ligand attachment, thereby facilitating target delivery. The goal of this study was to elucidate whether PAMAM dendrimers can efficiently deliver short interfering RNAs (siRNAs) to SSCs. Methods and results We introduced cyclic arginine-glycine-aspartic acid (cRGD) peptides to the fifth generation of PAMAM dendrimers (G5) to generate PAMAM-cRGD dendrimers (G5-cRGD). The characterization of G5-cRGD was detected by Fourier transform infrared spectroscope (FTIR), transmission electron microscope (TEM), and the Cell Counting Kit-8 (CCK-8) assay. Confocal microscopy and flow cytometry were used to evaluate the delivery efficiency of siRNA by G5-cRGD to SSCs. The results showed that G5-cRGD encompassing siRNA could self-assemble into spherical structures with nanoscale size and possess high transfection efficiency, excellent endosomal escape ability, and low cytotoxicity, superior to a commercial transfection reagent Lipofectamine® 2000. Moreover, we demonstrated that G5-cRGD efficiently delivered siRNAs and triggered gene silencing. Conclusions This study thus provides a promising nanovector for siRNA delivery in SSCs, facilitating the future clinical application of SSC auto-transplantation with genetically modified cells with a hope to cure male infertility that is caused by genetic disorders.
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Affiliation(s)
- Tianjiao Li
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, Key Laboratory for Animal Biotechnology, Ministry of Agriculture of China, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Qiwen Chen
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Yi Zheng
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, Key Laboratory for Animal Biotechnology, Ministry of Agriculture of China, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Pengfei Zhang
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, Key Laboratory for Animal Biotechnology, Ministry of Agriculture of China, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Xiaoxu Chen
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, Key Laboratory for Animal Biotechnology, Ministry of Agriculture of China, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Junna Lu
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Yinghua Lv
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Shiguo Sun
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, 712100, Shaanxi, China.
| | - Wenxian Zeng
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, Key Laboratory for Animal Biotechnology, Ministry of Agriculture of China, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China.
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Zhao D, Shen C, Gao T, Li H, Guo Y, Li F, Liu C, Liu Y, Chen X, Zhang X, Wu Y, Yu Y, Lin M, Yuan Y, Chen X, Huang X, Yang S, Yu J, Zhang J, Zheng B. Myotubularin related protein 7 is essential for the spermatogonial stem cell homeostasis via PI3K/AKT signaling. Cell Cycle 2019; 18:2800-2813. [PMID: 31478454 DOI: 10.1080/15384101.2019.1661174] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Myotubularin related protein 7 (MTMR7), a key member of the MTMR family, depicts phosphatase activity and is involved in myogenesis and tumor growth. We have previously identified MTMR7 in the proteomic profile of mouse spermatogonial stem cell (SSC) maturation and differentiation, implying that MTMR7 is associated with neonatal testicular development. In this study, to further explore the distribution and function of MTMR7 in mouse testis, we studied the effect of Mtmr7 knockdown on neonatal testicular development by testicular and SSC culture methods. Our results revealed that MTMR7 is exclusively located in early germ cells. Deficiency of MTMR7 by morpholino in neonatal testis caused excessive SSC proliferation, which was attributable to the aberrant PI3K/AKT signaling activation. Altogether, our study demonstrates that MTMR7 maintains SSC homeostasis by inhibiting PI3K/AKT signaling activation.
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Affiliation(s)
- Dan Zhao
- Fourth Affiliated Hospital of Jiangsu University , Zhenjiang , China
| | - Cong Shen
- Center for Reproduction and Genetics, Suzhou Municipal Hospital, the Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China.,State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
| | - Tingting Gao
- Center of Clinical Reproductive Medicine, the Affiliated Changzhou Matemity and Child Health Care Hospital of Nanjing Medical University , Changzhou , China
| | - Hong Li
- Center for Reproduction and Genetics, Suzhou Municipal Hospital, the Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China
| | - Yueshuai Guo
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China.,The Affiliated Wuxi Matemity and Child Health Care Hospital of Nanjing Medical University , Wuxi , China
| | - Feng Li
- Fourth Affiliated Hospital of Jiangsu University , Zhenjiang , China.,Reproductive Medicine Center, Northern Jiangsu Province Hospital , Yangzhou , China
| | - Chenchen Liu
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
| | - Yuanyuan Liu
- Center for Reproduction and Genetics, Suzhou Municipal Hospital, the Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China.,State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
| | - Xia Chen
- Department of Obstetrics and Gynecology, Affiliated Hospital of Jiangsu University, Jiangsu University , Zhenjiang , China
| | - Xi Zhang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
| | - Yangyang Wu
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
| | - Yi Yu
- Center for Reproduction and Genetics, Suzhou Municipal Hospital, the Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China
| | - Meng Lin
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
| | - Yan Yuan
- Human Reproductive and Genetic center, Affiliated Hospital of Jiangnan University , Wuxi , China
| | - Xiaofang Chen
- Fourth Affiliated Hospital of Jiangsu University , Zhenjiang , China
| | - Xiaoyan Huang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
| | - Shenmin Yang
- Center for Reproduction and Genetics, Suzhou Municipal Hospital, the Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China
| | - Jun Yu
- Department of Obstetrics and Gynecology, Affiliated Hospital of Jiangsu University, Jiangsu University , Zhenjiang , China
| | - Jun Zhang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
| | - Bo Zheng
- Center for Reproduction and Genetics, Suzhou Municipal Hospital, the Affiliated Suzhou Hospital of Nanjing Medical University , Suzhou , China.,State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University , Nanjing , China
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12
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Emerging roles of H3K9me3, SETDB1 and SETDB2 in therapy-induced cellular reprogramming. Clin Epigenetics 2019; 11:43. [PMID: 30850015 PMCID: PMC6408861 DOI: 10.1186/s13148-019-0644-y] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 02/28/2019] [Indexed: 12/21/2022] Open
Abstract
Background A multitude of recent studies has observed common epigenetic changes develop in tumour cells of multiple lineages following exposure to stresses such as hypoxia, chemotherapeutics, immunotherapy or targeted therapies. A significant increase in the transcriptionally repressive mark trimethylated H3K9 (H3K9me3) is becoming associated with treatment-resistant phenotypes suggesting upstream mechanisms may be a good target for therapy. We have reported that the increase in H3K9me3 is derived from the methyltransferases SETDB1 and SETDB2 following treatment in melanoma, lung, breast and colorectal cancer cell lines, as well as melanoma patient data. Other groups have observed a number of characteristics such as epigenetic remodelling, increased interferon signalling, cell cycle inhibition and apoptotic resistance that have also been reported by us suggesting these independent studies are investigating similar or identical phenomena. Main body Firstly, this review introduces reports of therapy-induced reprogramming in cancer populations with highly similar slow-cycling phenotypes that suggest a role for both IFN signalling and epigenetic remodelling in the acquisition of drug tolerance. We then describe plausible connections between the type 1 IFN pathway, slow-cycling phenotypes and these epigenetic mechanisms before reviewing recent evidence on the roles of SETDB1 and SETDB2, alongside their product H3K9me3, in treatment-induced reprogramming and promotion of drug resistance. The potential mechanisms for the activation of SETDB1 and SETDB2 and how they might arise in treatment is also discussed mechanistically, with a focus on their putative induction by inflammatory signalling. Moreover, we theorise their timely role in attenuating inflammation after their activation in order to promote a more resilient phenotype through homeostatic coordination of H3K9me3. We also examine the relatively uncharacterized functions of SETDB2 with some comparison to the more well-known qualities of SETDB1. Finally, an emerging overall mechanism for the epigenetic maintenance of this transient phenotype is outlined by summarising the collective literature herein. Conclusion A number of converging phenotypes outline a stress-responsive mechanism for SETDB1 and SETDB2 activation and subsequent increased survival, providing novel insights into epigenetic biology. A clearer understanding of how SETDB1/2-mediated transcriptional reprogramming can subvert treatment responses will be invaluable in improving length and efficacy of modern therapies.
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13
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AKT methylation by SETDB1 promotes AKT kinase activity and oncogenic functions. Nat Cell Biol 2019; 21:226-237. [PMID: 30692625 PMCID: PMC6377565 DOI: 10.1038/s41556-018-0261-6] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 12/10/2018] [Indexed: 12/15/2022]
Abstract
Aberrant activation of Akt disturbs proliferation, survival and metabolic homeostasis of various human cancers. Thus, it is critical to understand upstream signaling pathways governing Akt activation. Here, we report that Akt undergoes SETDB1-mediated lysine-methylation to promote its activation, which is antagonized by the Jumonji-family demethylase, KDM4B. Notably, compared with wild-type mice, mice harboring non-methylated mutant Akt1 not only exhibited reduced body size, but also were less prone to carcinogen-induced skin tumors in part due to reduced Akt activation. Mechanistically, Phosphatidylinositol (3,4,5)-trisphosphate (PIP3) interaction with Akt facilitates its interaction with SETDB1 for subsequent Akt methylation, which in turn sustains Akt phosphorylation. Pathologically, genetic alterations including SETDB1 amplification aberrantly promote Akt methylation to facilitate its activation and oncogenic functions. Thus, Akt methylation is an important step synergizing with PI3K signaling to control Akt activation, suggesting that targeting the SETDB1 signaling could be a potential therapeutic strategy for combatting hyperactive Akt-driven cancers.
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Chen R, Cui Y, Zhang X, Zhang Y, Chen M, Zhou T, Lan X, Dong W, Pan C. Chlorpyrifos Induction of Testicular-Cell Apoptosis through Generation of Reactive Oxygen Species and Phosphorylation of AMPK. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:12455-12470. [PMID: 30378422 DOI: 10.1021/acs.jafc.8b03407] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Chlorpyrifos (CPF) is the most frequently applied insecticide. Aside from effects on the neuronal cholinergic system, previous studies suggested a potential relationship between CPF exposure and male infertility; however, the molecular mechanism remains elusive. The aim of this study was to investigate the toxic effect of CPF on testicular cells and the potential mechanism via in vitro and in vivo experiments. The cytotoxic effects of CPF on mouse-derived spermatogonial cell lines (GC-1), Sertoli cell lines (TM4) and Leydig cell lines (TM3) were assessed by a CCK-8 assay, flow cytometry, a TUNEL assay, quantitative RT-PCR, and Western blotting. Exposure to CPF (10-50 μM) for 12 or 24 h resulted in significant death in all three testicular cell lines. The number of TUNEL-positive apoptotic cells were dose-dependent and increased with raised CPF concentrations. Further investigation indicated that CPF induced cell-cycle arrest and then promoted cell apoptosis. Additionally, CPF increased reactive-oxygen-species (ROS) production and lipid peroxidation (MDA) and reduced mitochondrial-membrane potential. The mechanism of cell apoptosis induced by CPF involved an increase in phosphorylated-AMP-activated-protein-kinase (p-AMPK) levels in the tested cells. In vivo, the expression of steroid-hormone-biosynthesis-related genes in testis, spleen, and lung in F0 and F1 mice were downregulated when there was intraperitoneal injection or dietary supplementation of CPF. This study provides a potential molecular mechanism of CPF-induced toxicity in testicular cells and a theoretical basis for future treatment of male infertility.
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Affiliation(s)
- Rui Chen
- College of Animal Science and Technology , Northwest A&F University , Yangling , Shaanxi 712100 , China
| | - Yang Cui
- College of Animal Science and Technology , Northwest A&F University , Yangling , Shaanxi 712100 , China
| | - Xuelian Zhang
- College of Animal Science and Technology , Northwest A&F University , Yangling , Shaanxi 712100 , China
| | - Yanghai Zhang
- College of Animal Science and Technology , Northwest A&F University , Yangling , Shaanxi 712100 , China
| | - Mingyue Chen
- College of Animal Science and Technology , Northwest A&F University , Yangling , Shaanxi 712100 , China
| | - Tong Zhou
- College of Animal Science and Technology , Northwest A&F University , Yangling , Shaanxi 712100 , China
| | - Xianyong Lan
- College of Animal Science and Technology , Northwest A&F University , Yangling , Shaanxi 712100 , China
| | - Wuzi Dong
- College of Animal Science and Technology , Northwest A&F University , Yangling , Shaanxi 712100 , China
| | - Chuanying Pan
- College of Animal Science and Technology , Northwest A&F University , Yangling , Shaanxi 712100 , China
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15
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Na HH, Kim KC. Homeostatic balance of histone acetylation and deconstruction of repressive chromatin marker H3K9me3 during adipocyte differentiation of 3T3-L1 cells. Genes Genomics 2018; 40:1301-1308. [PMID: 30094782 DOI: 10.1007/s13258-018-0725-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 07/29/2018] [Indexed: 12/30/2022]
Abstract
Background Adipocyte differentiation is completed by changing gene expression. Chromatin is closely related to gene expression. Therefore, its structure might be changed for adipocyte differentiation. Mouse 3T3-L1 preadipocytes have been used as a cell model to study molecular mechanisms of adipogenesis. Objective To examine changes of chromatin modification and expression of histone modifying enzymes during adipocyte differentiation. Methods Microscopic analysis and Oil Red O staining were performed to determine distinct phenotype of adipocyte differentiation. RT-PCR and Western blot analysis were used to examine expression levels of histone modifying enzymes during adipocyte differentiation. Histone modifications were examined by immunostaining analysis. Results Expression levels of P300 and cbp were increased during adipocyte differentiation. However, acetylation of histones was not quantitatively changed postdifferentiation of 3T3-L1 cells compared to that at pre-differentiation. RT-PCR and Western blot analyses showed that expression levels of hdac2 and hdac3 were increased during adipocyte differentiation, suggesting histone acetylation at chromatin level was homeostatically controlled by increased expression of both HATs and HDACs. Tri-methylation level of H3K9 (H3K9me3), but not that of H3K27me3, was significantly decreased during adipocyte differentiation. Decreased expression of setdb1 was consistent with reduced pattern of H3K9me3. Knock-down of setdb1 induced adipocyte differentiation. This suggests that setdb1 is a key chromatin modifier that modulates repressive chromatin. Conclusion These results suggest that there exist extensive mechanisms of chromatin modifications for homeostatic balance of chromatin acetylation and deconstruction of repressive chromatin during adipocyte differentiation.
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Affiliation(s)
- Han-Heom Na
- Department of Biological Sciences, College of Natural Sciences, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Keun-Cheol Kim
- Department of Biological Sciences, College of Natural Sciences, Kangwon National University, Chuncheon, 24341, Republic of Korea.
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16
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Cao T, Zhang X, Chen D, Zhang P, Li Q, Muhammad A. The epigenetic modification during the induction of Foxp3 with sodium butyrate. Immunopharmacol Immunotoxicol 2018; 40:309-318. [DOI: 10.1080/08923973.2018.1480631] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Tengli Cao
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Xiuxiu Zhang
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Dingding Chen
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Peiyan Zhang
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Qing Li
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Abbas Muhammad
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
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17
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Kang YK. Surveillance of Retroelement Expression and Nucleic-Acid Immunity by Histone Methyltransferase SETDB1. Bioessays 2018; 40:e1800058. [DOI: 10.1002/bies.201800058] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Revised: 05/31/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Yong-Kook Kang
- Development and Differentiation Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Department of Functional Genomics; University of Science and Technology (UST); Yuseong-gu Daejeon 34141 South Korea
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18
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Ropa J, Saha N, Chen Z, Serio J, Chen W, Mellacheruvu D, Zhao L, Basrur V, Nesvizhskii AI, Muntean AG. PAF1 complex interactions with SETDB1 mediate promoter H3K9 methylation and transcriptional repression of Hoxa9 and Meis1 in acute myeloid leukemia. Oncotarget 2018; 9:22123-22136. [PMID: 29774127 PMCID: PMC5955148 DOI: 10.18632/oncotarget.25204] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Accepted: 04/04/2018] [Indexed: 12/30/2022] Open
Abstract
The Polymerase Associated Factor 1 complex (PAF1c) is an epigenetic co-modifying complex that directly contacts RNA polymerase II (RNAPII) and several epigenetic regulating proteins. Mutations, overexpression and loss of expression of subunits of the PAF1c are observed in various forms of cancer suggesting proper regulation is needed for cellular development. However, the biochemical interactions with the PAF1c that allow dynamic gene regulation are unclear. We and others have shown that the PAF1c makes a direct interaction with MLL fusion proteins, which are potent oncogenic drivers of acute myeloid leukemia (AML). This interaction is critical for the maintenance of MLL translocation driven AML by targeting MLL fusion proteins to the target genes Meis1 and Hoxa9. Here, we use a proteomics approach to identify protein-protein interactions with the PAF1c subunit CDC73 that regulate the function of the PAF1c. We identified a novel interaction with a histone H3 lysine 9 (H3K9) methyltransferase protein, SETDB1. This interaction is stabilized with a mutant CDC73 that is incapable of supporting AML cell growth. Importantly, transcription of Meis1 and Hoxa9 is reduced and promoter H3K9 trimethylation (H3K9me3) increased by overexpression of SETDB1 or stabilization of the PAF1c-SETDB1 interaction in AML cells. These findings were corroborated in human AML patients where increased SETDB1 expression was associated with reduced HOXA9 and MEIS1. To our knowledge, this is the first proteomics approach to search for CDC73 protein-protein interactions in AML, and demonstrates that the PAF1c may play a role in H3K9me3-mediated transcriptional repression in AML.
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Affiliation(s)
- James Ropa
- Department of Pathology and The University of Michigan Medical School, Ann Arbor, Michigan, USA
- Department of Computational Medicine and Bioinformatics, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Nirmalya Saha
- Department of Pathology and The University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Zhiling Chen
- Department of Pathology and The University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Justin Serio
- Department of Pathology and The University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Wei Chen
- Department of Pathology and The University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Dattatreya Mellacheruvu
- Department of Computational Medicine and Bioinformatics, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Lili Zhao
- Department of Biostatistics, University of Michigan School of Public Health, Ann Arbor, Michigan, USA
| | - Venkatesha Basrur
- Department of Pathology and The University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Alexey I. Nesvizhskii
- Department of Pathology and The University of Michigan Medical School, Ann Arbor, Michigan, USA
- Department of Computational Medicine and Bioinformatics, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Andrew G. Muntean
- Department of Pathology and The University of Michigan Medical School, Ann Arbor, Michigan, USA
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