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Ladaika CA, Ghobashi AH, Boulton WC, Miller SA, O'Hagan HM. Single-cell multi-omics reveals insights into differentiation of rare cell types in mucinous colorectal cancer. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.01.578409. [PMID: 38370733 PMCID: PMC10871185 DOI: 10.1101/2024.02.01.578409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Neuroendocrine cells have been implicated in therapeutic resistance and worse overall survival in many cancer types. Mucinous colorectal cancer (mCRC) is uniquely enriched for enteroendocrine cells (EECs), the neuroendocrine cell of the normal colon epithelium, as compared to non-mucinous CRC. Therefore, targeting EEC differentiation may have clinical value in mCRC. Here, single cell multi-omics was used to uncover epigenetic alterations that accompany EEC differentiation, identify STAT3 as a novel regulator of EEC specification, and discover a rare cancer-specific cell type with enteric neuron-like characteristics. Further experiments demonstrated that lysine-specific demethylase 1 (LSD1) and CoREST2 mediate STAT3 demethylation and regulate STAT3 chromatin binding. Knockdown of CoREST2 in an orthotopic xenograft mouse model resulted in decreased primary tumor growth and lung metastases. In culmination, these results provide rationale for new LSD1 inhibitors that target the interaction between LSD1 with STAT3 or CoREST2, which may improve clinical outcomes for patients with mCRC.
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2
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Liu YR, Li WC, Hu JH, Li QQ, Zhang YP, Lu KH, Xu HY, Liang XW, Lu YQ, Yang XG. Comparison of the effects of buffalo LIF and mouse LIF on the in vitro culture of buffalo spermatogonia. Cell Biol Int 2023; 47:981-989. [PMID: 36691872 DOI: 10.1002/cbin.11994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 10/19/2022] [Accepted: 01/14/2023] [Indexed: 01/25/2023]
Abstract
Leukemia inhibitory factor (LIF) is an important growth factor that supports the culture and maintenance of spermatogonial stem cells (SSCs) by suppressing spontaneous differentiation. Different LIF sequences may lead to differences in function. The protein sequences of buffalo LIF and mouse LIF differed by 65.5% according to MEGA software analysis. The PB-LIF-GFP-Puro vector was constructed, and the CHO-K1 cell line was established. The final LIF protein concentration in the CHO-K1 cell culture medium was approximately 4.268 ng/mL. Here, we report that buffalo LIF effectively maintains the self-renewal of buffalo spermatogonia during culture. Buffalo spermatogonia were cultured in conditioned medium containing no LIF (0 ng/mL), mouse LIF (1 ng/mL), mouse LIF (10 ng/mL), or buffalo LIF (1 ng/mL). Furthermore, the effects of mouse LIF and buffalo LIF culture on the maintenance of buffalo spermatogonia were determined by analyzing cell colony formation, quantitative real-time polymerase chain reaction, cell immunofluorescence, and cell counting. The buffalo LIF (1 ng/mL) group showed similar maintenance of the proliferation of buffalo spermatogonia to that in the mouse LIF (10 ng/mL) group. These results demonstrated that the proliferation of buffalo spermatogonia can be maintained in vitro by adding a low dose of buffalo LIF. This study provides a foundation for the further optimization of in vitro buffalo SSC culture systems.
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Affiliation(s)
- Ya Ru Liu
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,College of Animal Science & Technology, Guangxi University, Nanning, Guangxi, China
| | - Wang Chang Li
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,College of Animal Science & Technology, Guangxi University, Nanning, Guangxi, China
| | - Jia Hao Hu
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,College of Animal Science & Technology, Guangxi University, Nanning, Guangxi, China
| | - Qi Qi Li
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,College of Animal Science & Technology, Guangxi University, Nanning, Guangxi, China
| | - Ya Ping Zhang
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,College of Animal Science & Technology, Guangxi University, Nanning, Guangxi, China
| | - Ke Huan Lu
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,College of Animal Science & Technology, Guangxi University, Nanning, Guangxi, China
| | - Hui Yan Xu
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,College of Animal Science & Technology, Guangxi University, Nanning, Guangxi, China
| | - Xing Wei Liang
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,College of Animal Science & Technology, Guangxi University, Nanning, Guangxi, China
| | - Yang Qing Lu
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,College of Animal Science & Technology, Guangxi University, Nanning, Guangxi, China
| | - Xiao Gan Yang
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,College of Animal Science & Technology, Guangxi University, Nanning, Guangxi, China
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3
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Eboreime J, Choi SK, Yoon SR, Sadybekov A, Katritch V, Calabrese P, Arnheim N. Germline selection of PTPN11 (HGNC:9644) variants make a major contribution to both Noonan syndrome's high birth rate and the transmission of sporadic cancer variants resulting in fetal abnormality. Hum Mutat 2022; 43:2205-2221. [PMID: 36349709 PMCID: PMC10099774 DOI: 10.1002/humu.24493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 09/20/2022] [Accepted: 10/12/2022] [Indexed: 11/10/2022]
Abstract
Some spontaneous germline gain-of-function mutations promote spermatogonial stem cell clonal expansion and disproportionate variant sperm production leading to unexpectedly high transmission rates for some human genetic conditions. To measure the frequency and spatial distribution of de novo mutations we divided three testes into 192 pieces each and used error-corrected deep-sequencing on each piece. We focused on PTPN11 (HGNC:9644) Exon 3 that contains 30 different PTPN11 Noonan syndrome (NS) mutation sites. We found 14 of these variants formed clusters among the testes; one testis had 11 different variant clusters. The mutation frequencies of these different clusters were not correlated with their case-recurrence rates nor were case recurrence rates of PTPN11 variants correlated with their tyrosine phosphatase levels thereby confusing PTPN11's role in germline clonal expansion. Six of the PTPN11 exon 3 de novo variants associated with somatic mutation-induced sporadic cancers (but not NS) also formed testis clusters. Further, three of these six variants were observed among fetuses that underwent prenatal ultrasound screening for NS-like features. Mathematical modeling showed that germline selection can explain both the mutation clusters and the high incidence of NS (1/1000-1/2500).
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Affiliation(s)
- Jordan Eboreime
- Department of Biological Sciences, Molecular and Computational Biology Program, University of Southern California, Los Angeles, California, USA
| | - Soo-Kyung Choi
- Department of Biological Sciences, Molecular and Computational Biology Program, University of Southern California, Los Angeles, California, USA
| | - Song-Ro Yoon
- Department of Biological Sciences, Molecular and Computational Biology Program, University of Southern California, Los Angeles, California, USA
| | - Anastasiia Sadybekov
- Department of Chemistry, Bridge Institute, University of Southern California, Los Angeles, California, USA
| | - Vsevolod Katritch
- Department of Chemistry, Bridge Institute, University of Southern California, Los Angeles, California, USA
| | - Peter Calabrese
- Department of Quantitative and Computational Biology, University of Southern California, Los Angeles, California, USA
| | - Norman Arnheim
- Department of Biological Sciences, Molecular and Computational Biology Program, University of Southern California, Los Angeles, California, USA
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4
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Li P, Tang J, Yu Z, Jin C, Wang Z, Li M, Zou D, Mang X, Liu J, Lu Y, Miao S, Wang L, Li K, Song W. CHD4 acts as a critical regulator in the survival of spermatogonial stem cells in mice. Biol Reprod 2022; 107:1331-1344. [PMID: 35980806 DOI: 10.1093/biolre/ioac162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 06/18/2022] [Accepted: 08/05/2022] [Indexed: 11/13/2022] Open
Abstract
Spermatogenesis is sustained by homeostatic balance between the self-renewal and differentiation of spermatogonial stem cells (SSCs), which is dependent on the strict regulation of transcription factor and chromatin modulator gene expression. Chromodomain helicase DNA-binding protein 4 (CHD4) is highly expressed in SSCs but roles in mouse spermatogenesis are not fully understood. Here, we report that the germ-cell-specific deletion of Chd4 resulted in complete infertility in male mice, with rapid loss of SSCs and excessive germ cell apoptosis. Chd4-knockdown in cultured SSCs also promoted the expression of apoptosis-related genes and thereby activated the tumor necrosis factor signaling pathway. Mechanistically, CHD4 occupies the genomic regulatory region of key apoptosis-related genes including Jun and Nfkb1. Together, our findings reveal the determinant role of CHD4 in SSCs survival in vivo, which will offer insight into the pathogenesis of male sterility and potential novel therapeutic targets.
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Affiliation(s)
- Pengyu Li
- Department of Biochemistry and Molecular Biology, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Beijing 100005, China
| | - Jielin Tang
- Department of Biochemistry and Molecular Biology, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Beijing 100005, China
| | - Zhixin Yu
- Department of Biochemistry and Molecular Biology, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Beijing 100005, China
| | - Cheng Jin
- Department of Biochemistry and Molecular Biology, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Beijing 100005, China
| | - Zhipeng Wang
- Department of Biochemistry and Molecular Biology, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Beijing 100005, China
| | - Mengzhen Li
- Department of Biochemistry and Molecular Biology, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Beijing 100005, China
| | - Dingfeng Zou
- Department of Biochemistry and Molecular Biology, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Beijing 100005, China
| | - Xinyu Mang
- Department of Biochemistry and Molecular Biology, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Beijing 100005, China
| | - Jun Liu
- Department of Biochemistry and Molecular Biology, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Beijing 100005, China
| | - Yan Lu
- Department of Biochemistry and Molecular Biology, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Beijing 100005, China
| | - Shiying Miao
- Department of Biochemistry and Molecular Biology, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Beijing 100005, China
| | - Linfang Wang
- Department of Biochemistry and Molecular Biology, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Beijing 100005, China
| | - Kai Li
- Department of Biochemistry and Molecular Biology, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Beijing 100005, China
| | - Wei Song
- Department of Biochemistry and Molecular Biology, State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College; Beijing 100005, China
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Sahota JS, Sharma B, Guleria K, Sambyal V. Candidate genes for infertility: an in-silico study based on cytogenetic analysis. BMC Med Genomics 2022; 15:170. [PMID: 35918717 PMCID: PMC9347124 DOI: 10.1186/s12920-022-01320-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 07/22/2022] [Indexed: 11/26/2022] Open
Abstract
Background The cause of infertility remains unclear in a significant proportion of reproductive-age couples who fail to conceive naturally. Chromosomal aberrations have been identified as one of the main genetic causes of male and female infertility. Structural chromosomal aberrations may disrupt the functioning of various genes, some of which may be important for fertility. The present study aims to identify candidate genes and putative functional interaction networks involved in male and female infertility using cytogenetic data from cultured peripheral blood lymphocytes of infertile patients. Methods Karyotypic analyses was done in 201 infertile patients (100 males and 101 females) and 201 age and gender matched healthy controls (100 males and 101 females) after 72 h peripheral lymphocyte culturing and GTG banding, followed by bioinformatic analysis using Cytoscape v3.8.2 and Metascape. Results Several chromosomal regions with a significantly higher frequency of structural aberrations were identified in the infertile males (5q2, 10q2, and 17q2) and females (6q2, 16q2, and Xq2). Segregation of the patients based on type of infertility (primary v/s secondary infertility) led to the identification of chromosomal regions with a significantly higher frequency of structural aberrations exclusively within the infertile males (5q2, 17q2) and females (16q2) with primary infertility. Cytoscape identified two networks specific to these regions: a male specific network with 99 genes and a female specific network with 109 genes. The top enriched GO terms within the male and female infertility networks were “skeletal system morphogenesis” and “mRNA transport” respectively. PSME3, PSMD3, and CDC27 were the top 3 hub genes identified within the male infertility network. Similarly, UPF3B, IRF8, and PSMB1 were the top 3 hub genes identified with the female infertility network. Among the hub genes identified in the male- and female-specific networks, PSMB1, PSMD3, and PSME3 are functional components of the proteasome complex. These hub genes have a limited number of reports related to their respective roles in maintenance of fertility in mice model and humans and require validation in further studies. Conclusion The candidate genes predicted in the present study can serve as targets for future research on infertility. Supplementary Information The online version contains supplementary material available at 10.1186/s12920-022-01320-x.
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Affiliation(s)
- Jatinder Singh Sahota
- Department of Human Genetics, Cytogenetics Laboratory, Guru Nanak Dev University (GNDU), Amritsar, Punjab, 143005, India
| | - Bhavna Sharma
- Department of Human Genetics, Cytogenetics Laboratory, Guru Nanak Dev University (GNDU), Amritsar, Punjab, 143005, India
| | - Kamlesh Guleria
- Department of Human Genetics, Cytogenetics Laboratory, Guru Nanak Dev University (GNDU), Amritsar, Punjab, 143005, India
| | - Vasudha Sambyal
- Department of Human Genetics, Cytogenetics Laboratory, Guru Nanak Dev University (GNDU), Amritsar, Punjab, 143005, India.
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6
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Lu C, Zhang D, Zhang J, Li L, Qiu J, Gou K, Cui S. Casein kinase 1α regulates murine spermatogenesis via p53-Sox3 signaling. Development 2022; 149:275697. [DOI: 10.1242/dev.200205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 05/31/2022] [Indexed: 11/20/2022]
Abstract
ABSTRACT
Casein kinase 1α (CK1α), acting as one member of the β-catenin degradation complex, negatively regulates the Wnt/β-catenin signaling pathway. CK1α knockout usually causes both Wnt/β-catenin and p53 activation. Our results demonstrated that conditional disruption of CK1α in spermatogonia impaired spermatogenesis and resulted in male mouse infertility. The progenitor cell population was dramatically decreased in CK1α conditional knockout (cKO) mice, while the proliferation of spermatogonial stem cells (SSCs) was not affected. Furthermore, our molecular analyses identified that CK1α loss was accompanied by nuclear stability of p53 protein in mouse spermatogonia, and dual-luciferase reporter and chromatin immunoprecipitation assays revealed that p53 directly targeted the Sox3 gene. In addition, the p53 inhibitor pifithrin α (PFTα) partially rescued the phenotype observed in cKO mice. Collectively, our data suggest that CK1α regulates spermatogenesis and male fertility through p53-Sox3 signaling, and they deepen our understanding of the regulatory mechanism underlying the male reproductive system.
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Affiliation(s)
- Chenyang Lu
- College of Veterinary Medicine, Yangzhou University 1 , Yangzhou 225009, Jiangsu , People's Republic of China
| | - Di Zhang
- College of Veterinary Medicine, Yangzhou University 1 , Yangzhou 225009, Jiangsu , People's Republic of China
| | - Jinglin Zhang
- Institute of Reproduction and Metabolism, Yangzhou University 2 , Yangzhou 225009, Jiangsu , People's Republic of China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University 3 , Yangzhou 225009, Jiangsu , People's Republic of China
| | - Liuhui Li
- College of Veterinary Medicine, Yangzhou University 1 , Yangzhou 225009, Jiangsu , People's Republic of China
| | - Jingtao Qiu
- College of Veterinary Medicine, Yangzhou University 1 , Yangzhou 225009, Jiangsu , People's Republic of China
| | - Kemian Gou
- College of Veterinary Medicine, Yangzhou University 1 , Yangzhou 225009, Jiangsu , People's Republic of China
- Institute of Reproduction and Metabolism, Yangzhou University 2 , Yangzhou 225009, Jiangsu , People's Republic of China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses 4 , Yangzhou 225009, Jiangsu , People's Republic of China
| | - Sheng Cui
- College of Veterinary Medicine, Yangzhou University 1 , Yangzhou 225009, Jiangsu , People's Republic of China
- Institute of Reproduction and Metabolism, Yangzhou University 2 , Yangzhou 225009, Jiangsu , People's Republic of China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses 4 , Yangzhou 225009, Jiangsu , People's Republic of China
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7
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Thirouard L, Holota H, Monrose M, Garcia M, de Haze A, Damon‐Soubeyrand C, Renaud Y, Saru J, Perino A, Schoonjans K, Beaudoin C, Volle DH. Identification of a Crosstalk among TGR5, GLIS2, and TP53 Signaling Pathways in the Control of Undifferentiated Germ Cell Homeostasis and Chemoresistance. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2200626. [PMID: 35435331 PMCID: PMC9189661 DOI: 10.1002/advs.202200626] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 03/09/2022] [Indexed: 06/14/2023]
Abstract
Spermatogonial stem cells regenerate and maintain spermatogenesis throughout life, making testis a good model for studying stem cell biology. The effects of chemotherapy on fertility have been well-documented previously. This study investigates how busulfan, an alkylating agent that is often used for chemotherapeutic purposes, affects male fertility. Specifically, the role of the TGR5 pathway is investigated on spermatogonia homeostasis using in vivo, in vitro, and pharmacological methods. In vivo studies are performed using wild-type and Tgr5-deficient mouse models. The results clearly show that Tgr5 deficiency can facilitate restoration of the spermatogonia homeostasis and allow faster resurgence of germ cell lineage after exposure to busulfan. TGR5 modulates the expression of key genes of undifferentiated spermatogonia such as Gfra1 and Fgfr2. At the molecular level, the present data highlight molecular mechanisms underlying the interactions among the TGR5, GLIS2, and TP53 pathways in spermatogonia associated with germ cell apoptosis following busulfan exposure. This study makes a significant contribution to the literature because it shows that TGR5 plays key role on undifferentiated germ cell homeostasis and that modulating the TGR5 signaling pathway could be used as a potential therapeutic tool for fertility disorders.
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Affiliation(s)
- Laura Thirouard
- INSERM U1103Université Clermont AuvergneCNRS UMR‐6293GReD InstituteTeam‐VolleClermont‐FerrandF‐63037France
| | - Hélène Holota
- INSERM U1103Université Clermont AuvergneCNRS UMR‐6293GReD InstituteTeam‐VolleClermont‐FerrandF‐63037France
| | - Mélusine Monrose
- INSERM U1103Université Clermont AuvergneCNRS UMR‐6293GReD InstituteTeam‐VolleClermont‐FerrandF‐63037France
| | - Manon Garcia
- INSERM U1103Université Clermont AuvergneCNRS UMR‐6293GReD InstituteTeam‐VolleClermont‐FerrandF‐63037France
| | - Angélique de Haze
- INSERM U1103Université Clermont AuvergneCNRS UMR‐6293GReD InstituteTeam‐VolleClermont‐FerrandF‐63037France
| | | | - Yoan Renaud
- INSERM U1103Université Clermont AuvergneCNRS UMR‐6293GReD InstituteBio‐informatic facilityClermont‐FerrandF‐63037France
| | - Jean‐Paul Saru
- INSERM U1103Université Clermont AuvergneCNRS UMR‐6293GReD InstituteTeam‐VolleClermont‐FerrandF‐63037France
| | - Alessia Perino
- Laboratory of Metabolic SignalingInstitute of BioengineeringSchool of Life SciencesEcole Polytechnique Fédérale de LausanneLausanneCH‐1015Switzerland
| | - Kristina Schoonjans
- Laboratory of Metabolic SignalingInstitute of BioengineeringSchool of Life SciencesEcole Polytechnique Fédérale de LausanneLausanneCH‐1015Switzerland
| | - Claude Beaudoin
- INSERM U1103Université Clermont AuvergneCNRS UMR‐6293GReD InstituteTeam‐VolleClermont‐FerrandF‐63037France
| | - David H. Volle
- INSERM U1103Université Clermont AuvergneCNRS UMR‐6293GReD InstituteTeam‐VolleClermont‐FerrandF‐63037France
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8
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Feng J, Tang Y, Yang Z, Bao B, Liu Y, Deng S, Li H, Li J, Wang J. Explore the Effect of Asthma Regulating HIF-1 Pathway on Sperm Quality Based on Rat Model. BIOMED RESEARCH INTERNATIONAL 2022; 2022:4194685. [PMID: 35620222 PMCID: PMC9129962 DOI: 10.1155/2022/4194685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 04/16/2022] [Indexed: 11/17/2022]
Abstract
This study is to verify the effect of asthma on sperm quality and explore its potential underlying mechanism. We randomly categorized the Sprague-Dawley (SD) rats into control (Group C) and asthma model (Group M) groups. Rats in the asthma model group were induced allergic asthma by intraperitoneal injection of ovalbumin solution. We evaluated the sperm motility and sperm concentration. The expression of the Interleukin-6 (IL6), phosphorylation-signal transducer and activator of transcription 3 (p-Stat3), and hypoxia-inducible factor-1α (HIF-1α) proteins and mRNAs in the testicular tissue was detected by western blotting and RT-qPCR. Compared with group C, sperm concentration and sperm motility in group M rats were significantly decreased (P < 0.05). Meanwhile, compared with group C, the expression levels of IL6, Stat3, and HIF-1α proteins and mRNAs in group M rats were significantly increased (P < 0.05). Asthma can regulate the HIF-1 signaling pathway, promoting the expression of IL6, Stat3, and HIF-1α protein and mRNAs, so as to promote sperm apoptosis and ultimately causing male infertility.
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Affiliation(s)
- Junlong Feng
- Beijing University of Chinese Medicine, Beijing 100029, China
- Department of Andrology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
| | - Yuan Tang
- Urology Andrology Center of Peking University First Hospital, Beijing 100034, China
| | - Zhen Yang
- Beijing University of Chinese Medicine, Beijing 100029, China
- Department of Andrology, Shunyi Hospital of Beijing Traditional Chinese Medicine Hospital, Beijing 101300, China
| | - Binghao Bao
- Beijing University of Chinese Medicine, Beijing 100029, China
| | - Yichen Liu
- Beijing University of Chinese Medicine, Beijing 100029, China
- Department of Andrology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
| | - Sheng Deng
- Beijing University of Chinese Medicine, Beijing 100029, China
- Department of Andrology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
| | - Haisong Li
- Department of Andrology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
| | - Jiangbin Li
- Department of Andrology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
| | - Jisheng Wang
- Department of Andrology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
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9
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Lord T, Law NC, Oatley MJ, Miao D, Du G, Oatley JM. A novel high throughput screen to identify candidate molecular networks that regulate spermatogenic stem cell functions. Biol Reprod 2022; 106:1175-1190. [PMID: 35244684 PMCID: PMC9198950 DOI: 10.1093/biolre/ioac048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 11/06/2021] [Accepted: 02/22/2022] [Indexed: 11/12/2022] Open
Abstract
Spermatogenic regeneration is key for male fertility and relies on activities of an undifferentiated spermatogonial population. Here, a high throughput approach with primary cultures of mouse spermatogonia was devised to rapidly predict alterations in functional capacity. Combining the platform with a large scale RNAi screen of transcription factors, we generated a repository of new information from which pathway analysis was able to predict candidate molecular networks regulating regenerative functions. Extending from this database, the SRCAP-CREBBP/EP300 complex was found to mediate differential levels of histone acetylation between stem cell and progenitor spermatogonia to influence expression of key self-renewal genes including the previously undescribed testis specific transcription factor ZSCAN2. Single cell RNA sequencing analysis revealed that ZSCAN2 deficiency alters key cellular processes in undifferentiated spermatogonia such as translation, chromatin modification, and ubiquitination. In Zscan2 knockout mice, while spermatogenesis was moderately impacted during steady-state, regeneration after cytotoxic insult was significantly impaired. Together, these findings have validated the utility of our high throughput screening approach and have generated a transcription factor database that can be utilized for uncovering novel mechanisms governing spermatogonial functions.
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Affiliation(s)
- Tessa Lord
- School of Molecular Biosciences, Centre for Reproductive Biology, College of Veterinary Medicine, Washington State University, Pullman, WA, 99164, USA.,Priority Research Centre for Reproductive Science, Discipline of Biological Sciences, The University of Newcastle, Callaghan, NSW, 2300, Australia.,Hunter Medical Research Institute, Infertility and Reproduction Program, New Lambton Heights, NSW 2305, Australia
| | - Nathan C Law
- School of Molecular Biosciences, Centre for Reproductive Biology, College of Veterinary Medicine, Washington State University, Pullman, WA, 99164, USA
| | - Melissa J Oatley
- School of Molecular Biosciences, Centre for Reproductive Biology, College of Veterinary Medicine, Washington State University, Pullman, WA, 99164, USA
| | - Deqiang Miao
- School of Molecular Biosciences, Centre for Reproductive Biology, College of Veterinary Medicine, Washington State University, Pullman, WA, 99164, USA
| | - Guihua Du
- School of Molecular Biosciences, Centre for Reproductive Biology, College of Veterinary Medicine, Washington State University, Pullman, WA, 99164, USA
| | - Jon M Oatley
- School of Molecular Biosciences, Centre for Reproductive Biology, College of Veterinary Medicine, Washington State University, Pullman, WA, 99164, USA
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10
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Analysis of the Reversible Impact of the Chemodrug Busulfan on Mouse Testes. Cells 2021; 10:cells10092403. [PMID: 34572051 PMCID: PMC8472455 DOI: 10.3390/cells10092403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 09/03/2021] [Accepted: 09/09/2021] [Indexed: 12/21/2022] Open
Abstract
Spermatogenesis is a process within the testis that leads to the production of spermatozoa. It is based on a population of spermatogonial stem cells, which have the capacity to self-renew and to differentiate throughout life to ensure the functions of reproduction are maintained. Male fertility disorders are responsible for half of the cases of infertility in couples worldwide. It is well known that cancer treatments are associated with reversible or irreversible fertility disorders. Busulfan (Bu) is an alkylating agent that significantly inhibits spermatogenesis. The present study relied on a combination of in vivo and in vitro approaches as well as RNAseq analysis to characterize the effects of Bu, in which mouse testes were used as a model. An in silico analysis revealed that many of the Bu-modulated genes are potentially regulated by the SIN3 Transcription Regulator Family Member A (SIN3A) and E2F Transcription Factor (E2F) families of transcription factors. The results demonstrate that the deregulated genes function in processes related to the cell cycle, DNA repair, and cell death mechanisms, including the Tumor Protein 53 (TP53) pathway. This reinforces the role of the TP53 signaling pathway as a major player in Bu effects. In addition, Bu altered the patterns of mRNA accumulation for various genes in undifferentiated spermatogonia. This work provides significant insight into the kinetics and impacts of busulfan, which could pave the way for developing strategies to minimize the impact of chemodrugs and, thus, could lead to germ cell lineage regeneration following anticancer treatments.
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11
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Schaschkow A, Pang L, Vandenbempt V, Elvira B, Litwak SA, Vekeriotaite B, Maillard E, Vermeersch M, Paula FMM, Pinget M, Perez-Morga D, Gough DJ, Gurzov EN. STAT3 Regulates Mitochondrial Gene Expression in Pancreatic β-Cells and Its Deficiency Induces Glucose Intolerance in Obesity. Diabetes 2021; 70:2026-2041. [PMID: 34183374 DOI: 10.2337/db20-1222] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 06/20/2021] [Indexed: 11/13/2022]
Abstract
Most obese and insulin-resistant individuals do not develop diabetes. This is the result of the capacity of β-cells to adapt and produce enough insulin to cover the needs of the organism. The underlying mechanism of β-cell adaptation in obesity, however, remains unclear. Previous studies have suggested a role for STAT3 in mediating β-cell development and human glucose homeostasis, but little is known about STAT3 in β-cells in obesity. We observed enhanced cytoplasmic expression of STAT3 in severely obese subjects with diabetes. To address the functional role of STAT3 in adult β-cells, we generated mice with tamoxifen-inducible partial or full deletion of STAT3 in β-cells and fed them a high-fat diet before analysis. Interestingly, β-cell heterozygous and homozygous STAT3-deficient mice showed glucose intolerance when fed a high-fat diet. Gene expression analysis with RNA sequencing showed that reduced expression of mitochondrial genes in STAT3 knocked down human EndoC-β1H cells, confirmed in FACS-purified β-cells from obese STAT3-deficient mice. Moreover, silencing of STAT3 impaired mitochondria activity in EndoC-β1H cells and human islets, suggesting a mechanism for STAT3-modulated β-cell function. Our study postulates STAT3 as a novel regulator of β-cell function in obesity.
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Affiliation(s)
- Anaïs Schaschkow
- Signal Transduction and Metabolism Laboratory, Laboratoire de Gastroentérologie Expérimental et Endotools, Université libre de Bruxelles, Brussels, Belgium
| | - Lokman Pang
- Department of Medicine, The University of Melbourne, Parkville, Australia
- St Vincent's Institute of Medical Research, Fitzroy, Australia
| | - Valerie Vandenbempt
- Signal Transduction and Metabolism Laboratory, Laboratoire de Gastroentérologie Expérimental et Endotools, Université libre de Bruxelles, Brussels, Belgium
| | - Bernat Elvira
- Signal Transduction and Metabolism Laboratory, Laboratoire de Gastroentérologie Expérimental et Endotools, Université libre de Bruxelles, Brussels, Belgium
| | - Sara A Litwak
- St Vincent's Institute of Medical Research, Fitzroy, Australia
| | - Beata Vekeriotaite
- Signal Transduction and Metabolism Laboratory, Laboratoire de Gastroentérologie Expérimental et Endotools, Université libre de Bruxelles, Brussels, Belgium
| | - Elisa Maillard
- Université de Strasbourg, Strasbourg, France
- Centre Européen d'Etude du Diabéte, Strasbourg, France
| | - Marjorie Vermeersch
- Center for Microscopy and Molecular Imaging, Université libre de Bruxelles, Brussels, Belgium
| | - Flavia M M Paula
- ULB-Center for Diabetes Research, Université libre de Bruxelles, Brussels, Belgium
| | - Michel Pinget
- Université de Strasbourg, Strasbourg, France
- Centre Européen d'Etude du Diabéte, Strasbourg, France
| | - David Perez-Morga
- Center for Microscopy and Molecular Imaging, Université libre de Bruxelles, Brussels, Belgium
| | - Daniel J Gough
- Centre for Cancer Research, Hudson Institute of Medical Research, Melbourne, Australia
- Department of Science and Translational Medicine, Monash University, Melbourne, Australia
| | - Esteban N Gurzov
- Signal Transduction and Metabolism Laboratory, Laboratoire de Gastroentérologie Expérimental et Endotools, Université libre de Bruxelles, Brussels, Belgium
- Department of Medicine, The University of Melbourne, Parkville, Australia
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12
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N'Tumba-Byn T, Yamada M, Seandel M. Loss of tyrosine kinase receptor Ephb2 impairs proliferation and stem cell activity of spermatogonia in culture†. Biol Reprod 2021; 102:950-962. [PMID: 31836902 DOI: 10.1093/biolre/ioz222] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 10/30/2019] [Accepted: 12/11/2019] [Indexed: 12/17/2022] Open
Abstract
Germline stem and progenitor cells can be extracted from the adult mouse testis and maintained long-term in vitro. Yet, the optimal culture conditions for preserving stem cell activity are unknown. Recently, multiple members of the Eph receptor family were detected in murine spermatogonia, but their roles remain obscure. One such gene, Ephb2, is crucial for maintenance of somatic stem cells and was previously found enriched at the level of mRNA in murine spermatogonia. We detected Ephb2 mRNA and protein in primary adult spermatogonial cultures and hypothesized that Ephb2 plays a role in maintenance of stem cells in vitro. We employed CRISPR-Cas9 targeting and generated stable mutant SSC lines with complete loss of Ephb2. The characteristics of Ephb2-KO cells were interrogated using phenotypic and functional assays. Ephb2-KO SSCs exhibited reduced proliferation compared to wild-type cells, while apoptosis was unaffected. Therefore, we examined whether Ephb2 loss correlates with activity of canonical pathways involved in stem cell self-renewal and proliferation. Ephb2-KO cells had reduced ERK MAPK signaling. Using a lentiviral transgene, Ephb2 expression was rescued in Ephb2-KO cells, which partially restored signaling and proliferation. Transplantation analysis revealed that Ephb2-KO SSCs cultures formed significantly fewer colonies than WT, indicating a role for Ephb2 in preserving stem cell activity of cultured cells. Transcriptome analysis of wild-type and Ephb2-KO SSCs identified Dppa4 and Bnc1 as differentially expressed, Ephb2-dependent genes that are potentially involved in stem cell function. These data uncover for the first time a crucial role for Ephb2 signaling in cultured SSCs.
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Affiliation(s)
- Thierry N'Tumba-Byn
- Department of Surgery, Weill Cornell Medical College, New York, NY, United States of America
| | - Makiko Yamada
- Department of Surgery, Weill Cornell Medical College, New York, NY, United States of America
| | - Marco Seandel
- Department of Surgery, Weill Cornell Medical College, New York, NY, United States of America
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13
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A regulatory role for CHD4 in maintenance of the spermatogonial stem cell pool. Stem Cell Reports 2021; 16:1555-1567. [PMID: 33961790 PMCID: PMC8190575 DOI: 10.1016/j.stemcr.2021.04.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 04/07/2021] [Accepted: 04/08/2021] [Indexed: 12/17/2022] Open
Abstract
Maintenance and self-renewal of the spermatogonial stem cell (SSC) population is the cornerstone of male fertility. Here, we have identified a key role for the nucleosome remodeling protein CHD4 in regulating SSC function. Gene expression analyses revealed that CHD4 expression is highly enriched in the SSC population in the mouse testis. Using spermatogonial transplantation techniques it was established that loss of Chd4 expression significantly impairs SSC regenerative capacity, causing a ∼50% reduction in colonization of recipient testes. An scRNA-seq comparison revealed reduced expression of “self-renewal” genes following Chd4 knockdown, along with increased expression of signature progenitor genes. Co-immunoprecipitation analyses demonstrated that CHD4 regulates gene expression in spermatogonia not only through its traditional association with the remodeling complex NuRD, but also via interaction with the GDNF-responsive transcription factor SALL4. Cumulatively, the results of this study depict a previously unappreciated role for CHD4 in controlling fate decisions in the spermatogonial pool. CHD4 is highly expressed in spermatogonial stem cells in the mouse testis CHD4 expression is required for spermatogonial stem cell maintenance CHD4 interacts with SALL4 and NuRD to activate expression of “self-renewal” genes
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14
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Suzuki S, Diaz VD, Hermann BP. What has single-cell RNA-seq taught us about mammalian spermatogenesis? Biol Reprod 2020; 101:617-634. [PMID: 31077285 DOI: 10.1093/biolre/ioz088] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Accepted: 05/09/2019] [Indexed: 12/18/2022] Open
Abstract
Mammalian spermatogenesis is a complex developmental program that transforms mitotic testicular germ cells (spermatogonia) into mature male gametes (sperm) for production of offspring. For decades, it has been known that this several-weeks-long process involves a series of highly ordered and morphologically recognizable cellular changes as spermatogonia proliferate, spermatocytes undertake meiosis, and spermatids develop condensed nuclei, acrosomes, and flagella. Yet, much of the underlying molecular logic driving these processes has remained opaque because conventional characterization strategies often aggregated groups of cells to meet technical requirements or due to limited capability for cell selection. Recently, a cornucopia of single-cell transcriptome studies has begun to lift the veil on the full compendium of gene expression phenotypes and changes underlying spermatogenic development. These datasets have revealed the previously obscured molecular heterogeneity among and between varied spermatogenic cell types and are reinvigorating investigation of testicular biology. This review describes the extent of available single-cell RNA-seq profiles of spermatogenic and testicular somatic cells, how those data were produced and evaluated, their present value for advancing knowledge of spermatogenesis, and their potential future utility at both the benchtop and bedside.
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Affiliation(s)
- Shinnosuke Suzuki
- Department of Biology, University of Texas at San Antonio, San Antonio, Texas
| | - Victoria D Diaz
- Department of Biology, University of Texas at San Antonio, San Antonio, Texas
| | - Brian P Hermann
- Department of Biology, University of Texas at San Antonio, San Antonio, Texas
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15
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Xie Y, Wei BH, Ni FD, Yang WX. Conversion from spermatogonia to spermatocytes: Extracellular cues and downstream transcription network. Gene 2020; 764:145080. [PMID: 32858178 DOI: 10.1016/j.gene.2020.145080] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 08/16/2020] [Accepted: 08/19/2020] [Indexed: 12/15/2022]
Abstract
Spermatocyte (spc) formation from spermatogonia (spg) differentiation is the first step of spermatogenesis which produces prodigious spermatozoa for a lifetime. After decades of studies, several factors involved in the functioning of a mouse were discovered both inside and outside spg. Considering the peculiar expression and working pattern of each factor, this review divides the whole conversion of spg to spc into four consecutive development processes with a focus on extracellular cues and downstream transcription network in each one. Potential coordination among Dmrt1, Sohlh1/2 and BMP families mediates Ngn3 upregulation, which marks progenitor spg, with other changes. After that, retinoic acid (RA), as a master regulator, promotes A1 spg formation with its helpers and Sall4. A1-to-B spg transition is under the control of Kitl and impulsive RA signaling together with early and late transcription factors Stra8 and Dmrt6. Finally, RA and its responsive effectors conduct the entry into meiosis. The systematic transcription network from outside to inside still needs research to supplement or settle the controversials in each process. As a step further ahead, this review provides possible drug targets for infertility therapy by cross-linking humans and mouse model.
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Affiliation(s)
- Yi Xie
- The Sperm Laboratory, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Bang-Hong Wei
- The Sperm Laboratory, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Fei-Da Ni
- The Sperm Laboratory, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Wan-Xi Yang
- The Sperm Laboratory, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China.
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16
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Chen W, Zhang Z, Chang C, Yang Z, Wang P, Fu H, Wei X, Chen E, Tan S, Huang W, Sun L, Ni T, Yang Y, Wang Y. A bioenergetic shift is required for spermatogonial differentiation. Cell Discov 2020; 6:56. [PMID: 32864161 PMCID: PMC7431567 DOI: 10.1038/s41421-020-0183-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 05/22/2020] [Indexed: 12/22/2022] Open
Abstract
A bioenergetic balance between glycolysis and mitochondrial respiration is particularly important for stem cell fate specification. It however remains to be determined whether undifferentiated spermatogonia switch their preference for bioenergy production during differentiation. In this study, we found that ATP generation in spermatogonia was gradually increased upon retinoic acid (RA)-induced differentiation. To accommodate this elevated energy demand, RA signaling concomitantly switched ATP production in spermatogonia from glycolysis to mitochondrial respiration, accompanied by increased levels of reactive oxygen species. Disrupting mitochondrial respiration significantly blocked spermatogonial differentiation. Inhibition of glucose conversion to glucose-6-phosphate or pentose phosphate pathway also repressed the formation of c-Kit+ differentiating germ cells, suggesting that metabolites produced from glycolysis are required for spermatogonial differentiation. We further demonstrated that the expression levels of several metabolic regulators and enzymes were significantly altered upon RA-induced differentiation, with both RNA-seq and quantitative proteomic analyses. Taken together, our data unveil a critically regulated bioenergetic balance between glycolysis and mitochondrial respiration that is required for spermatogonial proliferation and differentiation.
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Affiliation(s)
- Wei Chen
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241 China
| | - Zhaoran Zhang
- Department of Animal Sciences, College of Agriculture and Natural Resources, Michigan State University, East Lansing, MI 48824 USA
| | - Chingwen Chang
- Department of Animal Sciences, College of Agriculture and Natural Resources, Michigan State University, East Lansing, MI 48824 USA
| | - Zhichang Yang
- Department of Chemistry, College of Natural Science, Michigan State University, East Lansing, MI 48824 USA
| | - Pengxiang Wang
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241 China
| | - Haihui Fu
- State Key Laboratory of Genetic Engineering & MOE Key Laboratory of Contemporary Anthropology, Collaborative Innovation Center of Genetics and Development, School of Life Sciences, Fudan University, Shanghai, 200438 China
| | - Xiao Wei
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241 China
| | - Eric Chen
- Department of Animal Sciences, College of Agriculture and Natural Resources, Michigan State University, East Lansing, MI 48824 USA
| | - Suxu Tan
- Department of Animal Sciences, College of Agriculture and Natural Resources, Michigan State University, East Lansing, MI 48824 USA
| | - Wen Huang
- Department of Animal Sciences, College of Agriculture and Natural Resources, Michigan State University, East Lansing, MI 48824 USA
| | - Liangliang Sun
- Department of Chemistry, College of Natural Science, Michigan State University, East Lansing, MI 48824 USA
| | - Ting Ni
- State Key Laboratory of Genetic Engineering & MOE Key Laboratory of Contemporary Anthropology, Collaborative Innovation Center of Genetics and Development, School of Life Sciences, Fudan University, Shanghai, 200438 China
| | - Yi Yang
- Synthetic Biology and Biotechnology Laboratory, State Key Laboratory of Bioreactor Engineering, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237 China
| | - Yuan Wang
- Department of Animal Sciences, College of Agriculture and Natural Resources, Michigan State University, East Lansing, MI 48824 USA
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17
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Lord T, Nixon B. Metabolic Changes Accompanying Spermatogonial Stem Cell Differentiation. Dev Cell 2020; 52:399-411. [PMID: 32097651 DOI: 10.1016/j.devcel.2020.01.014] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 11/27/2019] [Accepted: 01/13/2020] [Indexed: 12/12/2022]
Abstract
Male fertility is driven by spermatogonial stem cells (SSCs) that self-renew while also giving rise to differentiating spermatogonia. Spermatogonial transitions are accompanied by a shift in gene expression, however, whether equivalent changes in metabolism occur remains unexplored. In this review, we mined recently published scRNA-seq databases from mouse and human testes to compare expression profiles of spermatogonial subsets, focusing on metabolism. Comparisons revealed a conserved upregulation of genes involved in mitochondrial function, biogenesis, and oxidative phosphorylation in differentiating spermatogonia, while gene expression in SSCs reflected a glycolytic cell. Here, we also discuss the relationship between metabolism and the external microenvironment within which spermatogonia reside.
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Affiliation(s)
- Tessa Lord
- Priority Research Centre for Reproductive Science, Discipline of Biological Sciences, the University of Newcastle, Callaghan, Newcastle, NSW 2300, Australia; Hunter Medical Research Institute, Pregnancy and Reproduction Program, New Lambton Heights, Newcastle, NSW 2305, Australia.
| | - Brett Nixon
- Priority Research Centre for Reproductive Science, Discipline of Biological Sciences, the University of Newcastle, Callaghan, Newcastle, NSW 2300, Australia; Hunter Medical Research Institute, Pregnancy and Reproduction Program, New Lambton Heights, Newcastle, NSW 2305, Australia
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18
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SOX3 promotes generation of committed spermatogonia in postnatal mouse testes. Sci Rep 2020; 10:6751. [PMID: 32317665 PMCID: PMC7174399 DOI: 10.1038/s41598-020-63290-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 03/19/2020] [Indexed: 01/19/2023] Open
Abstract
SOX3 is a transcription factor expressed within the developing and adult nervous system where it mostly functions to help maintain neural precursors. Sox3 is also expressed in other locations, notably within the spermatogonial stem/progenitor cell population in postnatal testis. Independent studies have shown that Sox3 null mice exhibit a spermatogenic block as young adults, the mechanism of which remains poorly understood. Using a panel of spermatogonial cell marker genes, we demonstrate that Sox3 is expressed within the committed progenitor fraction of the undifferentiated spermatogonial pool. Additionally, we use a Sox3 null mouse model to define a potential role for this factor in progenitor cell function. We demonstrate that Sox3 expression is required for transition of undifferentiated cells from a GFRα1+ self-renewing state to the NGN3 + transit-amplifying compartment. Critically, using chromatin immunoprecipitation, we demonstrate that SOX3 binds to a highly conserved region in the Ngn3 promoter region in vivo, indicating that Ngn3 is a direct target of SOX3. Together these studies indicate that SOX3 functions as a pro-commitment factor in spermatogonial stem/progenitor cells.
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Pelzman DL, Orwig KE, Hwang K. Progress in translational reproductive science: testicular tissue transplantation and in vitro spermatogenesis. Fertil Steril 2020; 113:500-509. [PMID: 32111477 DOI: 10.1016/j.fertnstert.2020.01.038] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 01/30/2020] [Indexed: 02/07/2023]
Abstract
Since the birth of the first child conceived via in vitro fertilization 40 years ago, fertility treatments and assisted reproductive technology have allowed many couples to reach their reproductive goals. As of yet, no fertility options are available for men who cannot produce functional sperm, but many experimental therapies have demonstrated promising results in animal models. Both autologous (stem cell transplantation, de novo morphogenesis, and testicular tissue grafting) and outside-the-body (xenografting and in vitro spermatogenesis) approaches exist for restoring sperm production in infertile animals with varying degrees of success. Once safety profiles are established and an ideal patient population is chosen, some of these techniques may be ready for human experimentation in the near future, with likely clinical implementation within the next decade.
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Affiliation(s)
- Daniel L Pelzman
- Department of Urology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Kyle E Orwig
- Department of Obstetrics, Gynecology, and Reproductive Sciences and Magee-Womens Research Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Kathleen Hwang
- Department of Urology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; Department of Obstetrics, Gynecology, and Reproductive Sciences and Magee-Womens Research Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.
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20
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Qi L, Li J, Le W, Zhang J. Low-dose ionizing irradiation triggers apoptosis of undifferentiated spermatogonia in vivo and in vitro. Transl Androl Urol 2019; 8:591-600. [PMID: 32038955 DOI: 10.21037/tau.2019.10.16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Background The present study aimed to investigate the mechanism of low-dose ionizing radiation (IR) induced apoptosis of undifferentiated spermatogonia in vivo and in vitro. Methods Following 50 mGy IR, testicular tissues were collected from the adult DBA/2 mice at 1, 2 and 24 h; mice in the control group received pseudo-irradiation. Immunofluorescence (IF) staining and TUNEL were performed to assess DNA damage and apoptosis, respectively, in the irradiated testicular tissues. Furthermore, the spermatogonia were also irradiated in vitro, and the expression of apoptosis-related proteins was detected by Western blotting. TUNEL and flow cytometry were applied to assess cell apoptosis. Results γH2AX (a marker of DNA damage) was up-regulated in the seminiferous tubules at 1 and 2 h after IR, but it was reduced following the DNA repair. This was consistent with the finding that apoptosis of germline cells was present in the seminiferous tubules after IR, especially at 1 h (IF and TUNEL). Apoptosis was also present in the PLZF(+) spermatogonia, particularly at 1 h after IR. Apoptotic cells decreased with the increase in DNA repair time after IR. Moreover, the caspase-3 protein was expressed in the undifferentiated spermatogonia following IR. The expression of caspase-3, P53, Ku70 and DNA-PKcs in the cultured spermatogonia was also up-regulated following IR in vitro, but their expression decreased gradually over time after IR, which was supported by the findings from flow cytometry, and the apoptosis of spermatogonia peaked at 24 h post IR. Conclusions IR may induce the apoptosis of spermatogonia at early stage in vivo, but the apoptosis of spermatogonia secondary to IR occurs at a relatively later time point (24 h) in vitro mainly. The apoptosis of spermatogonia is improved over time after IR.
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Affiliation(s)
- Lixin Qi
- Department of Urology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
| | - Jiaxuan Li
- Department of Urology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
| | - Wei Le
- Department of Urology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
| | - Jinfu Zhang
- Department of Urology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China.,Department of Urology, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200050, China
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La HM, Hobbs RM. Mechanisms regulating mammalian spermatogenesis and fertility recovery following germ cell depletion. Cell Mol Life Sci 2019; 76:4071-4102. [PMID: 31254043 PMCID: PMC11105665 DOI: 10.1007/s00018-019-03201-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 06/07/2019] [Accepted: 06/19/2019] [Indexed: 12/19/2022]
Abstract
Mammalian spermatogenesis is a highly complex multi-step process sustained by a population of mitotic germ cells with self-renewal potential known as spermatogonial stem cells (SSCs). The maintenance and regulation of SSC function are strictly dependent on a supportive niche that is composed of multiple cell types. A detailed appreciation of the molecular mechanisms underpinning SSC activity and fate is of fundamental importance for spermatogenesis and male fertility. However, different models of SSC identity and spermatogonial hierarchy have been proposed and recent studies indicate that cell populations supporting steady-state germline maintenance and regeneration following damage are distinct. Importantly, dynamic changes in niche properties may underlie the fate plasticity of spermatogonia evident during testis regeneration. While formation of spermatogenic colonies in germ-cell-depleted testis upon transplantation is a standard assay for SSCs, differentiation-primed spermatogonial fractions have transplantation potential and this assay provides readout of regenerative rather than steady-state stem cell capacity. The characterisation of spermatogonial populations with regenerative capacity is essential for the development of clinical applications aimed at restoring fertility in individuals following germline depletion by genotoxic treatments. This review will discuss regulatory mechanisms of SSCs in homeostatic and regenerative testis and the conservation of these mechanisms between rodent models and man.
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Affiliation(s)
- Hue M La
- Australian Regenerative Medicine Institute, Monash University, Melbourne, VIC, 3800, Australia
- Development and Stem Cells Program, Monash Biomedicine Discovery Institute and Department of Anatomy and Developmental Biology, Monash University, Melbourne, VIC, 3800, Australia
| | - Robin M Hobbs
- Australian Regenerative Medicine Institute, Monash University, Melbourne, VIC, 3800, Australia.
- Development and Stem Cells Program, Monash Biomedicine Discovery Institute and Department of Anatomy and Developmental Biology, Monash University, Melbourne, VIC, 3800, Australia.
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22
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Abou Nader N, Levasseur A, Zhang X, Boerboom D, Nagano MC, Boyer A. Yes-associated protein expression in germ cells is dispensable for spermatogenesis in mice. Genesis 2019; 57:e23330. [PMID: 31386299 DOI: 10.1002/dvg.23330] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 07/12/2019] [Accepted: 07/13/2019] [Indexed: 12/15/2022]
Abstract
Yes-associated protein (YAP), a key effector of the Hippo signaling pathway, is expressed in the nucleus of spermatogonia in mice, suggesting a potential role in spermatogenesis. Here, we report the generation of a conditional knockout mouse model (Yapflox/flox ; Ddx4cre/+ ) that specifically inactivates Yap in the germ cells. The inactivation of Yap in spermatogonia was found to be highly efficient in this model. The loss of Yap in the germ cells had no observable effect on spermatogenesis in vivo. Histological examination of the testes showed no structural differences between mutant animals and age-matched Yapflox/flox controls, nor was any differences detected in gonadosomatic index, expression of germ cell markers or sperm counts. Cluster-forming assay using undifferentiated spermatogonia, including spermatogonial stem cells (SSCs), also showed that YAP is dispensable for SSC cluster formation in vitro. However, an increase in the expression of spermatogenesis and oogenesis basic helix-loop-helix 1 (Sohlh1) and neurogenin 3 (Ngn3) was observed in clusters derived from Yapflox/flox ; Ddx4cre/+ animals. Taken together, these results suggest that YAP fine-tunes the expression of genes associated with spermatogonial fate commitment, but that its loss is not sufficient to alter spermatogenesis in vivo.
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Affiliation(s)
- Nour Abou Nader
- Centre de Recherche en Reproduction et Fertilité, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Quebec, Canada
| | - Adrien Levasseur
- Centre de Recherche en Reproduction et Fertilité, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Quebec, Canada
| | - Xiangfan Zhang
- Department of Obstetrics and Gynecology, Division of Reproductive Biology, Faculty of Medicine, McGill University, Montréal, Québec, Canada
| | - Derek Boerboom
- Centre de Recherche en Reproduction et Fertilité, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Quebec, Canada
| | - Makoto C Nagano
- Department of Obstetrics and Gynecology, Division of Reproductive Biology, Faculty of Medicine, McGill University, Montréal, Québec, Canada
| | - Alexandre Boyer
- Centre de Recherche en Reproduction et Fertilité, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Quebec, Canada
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Single cell RNA-sequencing identified Dec2 as a suppressive factor for spermatogonial differentiation by inhibiting Sohlh1 expression. Sci Rep 2019; 9:6063. [PMID: 30988352 PMCID: PMC6465314 DOI: 10.1038/s41598-019-42578-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 04/03/2019] [Indexed: 12/31/2022] Open
Abstract
Gonocyte-to-spermatogonia transition is a critical fate determination process to initiate sperm production throughout the lifecycle. However, the molecular dynamics of this process has not been fully elucidated mainly due to the asynchronized differentiation stages of neonatal germ cells. In this study, we employed single cell RNA sequencing analyses of P1.5–5.5 germ cells to clarify the temporal dynamics of gene expression during gonocyte-to-spermatogonia transition. The analyses identified transcriptional modules, one of which regulates spermatogonial gene network in neonatal germ cells. Among them, we identified Dec2, a bHLH-type transcription factor, as a transcriptional repressor for a spermatogonial differentiation factor Sohlh1. Deficiency of Dec2 in mice induces significant reduction of undifferentiated spermatogonia, and transplantation assay using Dec2-depleted cells also demonstrated the impaired efficiency of engraftment, suggesting its role in maintaining spermatogonial stem cells (SSCs). Collectively, this study revealed the intrinsic role of a new SSC factor Dec2, which protects germ cells from inadequate differentiation during neonatal testis development.
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24
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Tu J, Zhang P, Shui Luk AC, Liao J, Chan WY, Qi H, Hoi-Hung AC, Lee TL. MicroRNA-26b promotes transition from Kit- to Kit+ mouse spermatogonia. Exp Cell Res 2018; 373:71-79. [DOI: 10.1016/j.yexcr.2018.09.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 09/07/2018] [Accepted: 09/24/2018] [Indexed: 12/22/2022]
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25
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Lord T, Oatley JM. A revised A single model to explain stem cell dynamics in the mouse male germline. Reproduction 2018. [PMID: 28624768 DOI: 10.1530/rep-17-0034] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Spermatogonial stem cells (SSCs) and progenitor spermatogonia encompass the undifferentiated spermatogonial pool in mammalian testes. In rodents, this population is comprised of Asingle, Apaired and chains of 4-16 Aaligned spermatogonia. Although traditional models propose that the entire Asingle pool represents SSCs, and formation of an Apaired syncytium symbolizes irreversible entry to a progenitor state destined for differentiation; recent models have emerged that suggest that the Asingle pool is heterogeneous, and Apaired/Aaligned can fragment to produce new SSCs. In this review, we explore evidence from the literature for these differing models representing SSC dynamics, including the traditional 'Asingle' and more recently formed 'fragmentation' models. Further, based on findings using a fluorescent reporter transgene (eGfp) that reflects expression of the SSC-specific transcription factor 'inhibitor of DNA binding 4' (Id4), we propose a revised version of the traditional model in which SSCs are a subset of the Asingle population; the ID4-eGFP bright cells (SSCultimate). From the SSCultimate pool, other Asingle and Apaired cohorts arise that are ID4-eGFP dim. Although the SSCultimate possess a transcriptome profile that reflects a self-renewing state, the transcriptome of the ID4-eGFP dim population resembles that of cells in transition (SSCtransitory) to a progenitor state. Accordingly, at the next mitotic division, these SSCtransitory are likely to join the progenitor pool and have lost stem cell capacity. This model supports the concept of a linear relationship between spermatogonial chain length and propensity for differentiation, while leaving open the possibility that the SSCtransitory (some Asingle and potentially some Apaired spermatogonia), may contribute to the self-renewing pool rather than transition to a progenitor state in response to perturbations of steady-state conditions.
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Affiliation(s)
- Tessa Lord
- Center for Reproductive BiologySchool of Molecular Biosciences, College of Veterinary Medicine, Washington State University, Pullman, Washington, USA
| | - Jon M Oatley
- Center for Reproductive BiologySchool of Molecular Biosciences, College of Veterinary Medicine, Washington State University, Pullman, Washington, USA
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26
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Nagasawa K, Imura-Kishi K, Uchida A, Hiramatsu R, Kurohmaru M, Kanai Y. Regionally distinct patterns of STAT3 phosphorylation in the seminiferous epithelia of mouse testes. Mol Reprod Dev 2018; 85:262-270. [PMID: 29393534 DOI: 10.1002/mrd.22962] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 01/10/2018] [Accepted: 01/19/2018] [Indexed: 12/30/2022]
Abstract
In mouse testes, Sertoli cells support the continuous process of spermatogenesis, which is dependent on seminiferous epithelial cycles along the longitudinal axis of the seminiferous tubule. Sertoli cell function is modulated partly by local cytokines and/or growth factors derived from adjacent tissues such as blood vessels, macrophages, rete testis, etc. However, the spatial activation patterns by local signals in vivo remain unclear. In this study, we focused on Signal Transducers and Activators of Transcription (STAT) signaling in Sertoli cells, because STAT is a major crucial cytokine transducer for somatic cyst cell regulation in Drosophila testis niches. In mouse testes, STAT3 was ubiquitously expressed in Sertoli cells throughout the seminiferous tubules. Phosphorylated STAT3 (p-STAT3) was predominantly observed in the Sertoli cells within the valve-like structure adjacent to the rete testis (i.e., the Sertoli valve [SV]) in the terminal segment of the proximal seminiferous tubules. In the distal seminiferous tubules with active spermatogenesis, most Sertoli cells were negative for anti-p-STAT3 staining. Albeit rarely, a small patch of several p-STAT3-positive Sertoli cells was detected frequently in seminiferous epithelial cycle stages I-VI. Such p-STAT3-positive ratios in the convoluted seminiferous epithelia were significantly increased in germ cell-less testes than in the wild-type testes, but with considerably lower ratios than in the SV region. These findings imply that regionally distinct patterns of STAT3 phosphorylation in the Sertoli cells depend on either location or spermatogenic activity in normal healthy testes in vivo, highlighting a novel entry point to understanding STAT signaling in mammalian spermatogenesis.
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Affiliation(s)
- Keiya Nagasawa
- Department of Veterinary Anatomy, The University of Tokyo, Yayoi, Tokyo, Japan
| | - Kasane Imura-Kishi
- Department of Veterinary Anatomy, The University of Tokyo, Yayoi, Tokyo, Japan
| | - Aya Uchida
- Department of Veterinary Anatomy, The University of Tokyo, Yayoi, Tokyo, Japan
| | - Ryuji Hiramatsu
- Department of Veterinary Anatomy, The University of Tokyo, Yayoi, Tokyo, Japan
| | - Masamichi Kurohmaru
- Department of Veterinary Anatomy, The University of Tokyo, Yayoi, Tokyo, Japan
| | - Yoshiakira Kanai
- Department of Veterinary Anatomy, The University of Tokyo, Yayoi, Tokyo, Japan
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27
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Testicular Architecture Is Critical for Mediation of Retinoic Acid Responsiveness by Undifferentiated Spermatogonial Subtypes in the Mouse. Stem Cell Reports 2018; 10:538-552. [PMID: 29398482 PMCID: PMC5830974 DOI: 10.1016/j.stemcr.2018.01.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 01/04/2018] [Accepted: 01/05/2018] [Indexed: 02/07/2023] Open
Abstract
Spermatogenesis requires retinoic acid (RA) induction of the undifferentiated to differentiating transition in transit amplifying (TA) progenitor spermatogonia, whereas continuity of the spermatogenic lineage relies on the RA response being suppressed in spermatogonial stem cells (SSCs). Here, we discovered that, in mouse testes, both spermatogonial populations possess intrinsic RA-response machinery and exhibit hallmarks of the differentiating transition following direct exposure to RA, including loss of SSC regenerative capacity. We determined that SSCs are only resistant to RA-driven differentiation when situated in the normal topological organization of the testis. Furthermore, we show that the soma is instrumental in “priming” TA progenitors for RA-induced differentiation through elevated RA receptor expression. Collectively, these findings indicate that SSCs and TA progenitor spermatogonia inhabit disparate niche microenvironments within seminiferous tubules that are critical for mediating extrinsic cues that drive fate decisions. Contrary to previous dogma, SSCs do express RARγ, as well as other RAR/RXR variants Following direct exposure, SSCs exhibit an RA signaling response SSCs are protected from RA by the niche microenvironment in the testis Signals from the soma prime progenitors for RA-driven differentiation
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28
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Sisakhtnezhad S, Heshmati P. Comparative analysis of single-cell RNA sequencing data from mouse spermatogonial and mesenchymal stem cells to identify differentially expressed genes and transcriptional regulators of germline cells. J Cell Physiol 2018; 233:5231-5242. [PMID: 29194616 DOI: 10.1002/jcp.26303] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 11/28/2017] [Indexed: 12/17/2022]
Abstract
Identifying effective internal factors for regulating germline commitment during development and for maintaining spermatogonial stem cells (SSCs) self-renewal is important to understand the molecular basis of spermatogenesis process, and to develop new protocols for the production of the germline cells from other cell sources. Therefore, this study was designed to investigate single-cell RNA-sequencing data for identification of differentially expressed genes (DEGs) in 12 mouse-derived single SSCs (mSSCs) in compare with 16 mouse-derived single mesenchymal stem cells. We also aimed to find transcriptional regulators of DEGs. Collectively, 1,584 up-regulated DEGs were identified that are associated with 32 biological processes. Moreover, investigation of the expression profiles of genes including in spermatogenesis process revealed that Dazl, Ddx4, Sall4, Fkbp6, Tex15, Tex19.1, Rnf17, Piwil2, Taf7l, Zbtb16, and Cadm1 are presented in the first 30 up-regulated DEGs. We also found 12 basal transcription factors (TFs) and three sequence-specific TFs that control the expression of DEGs. Our findings also indicated that MEIS1, SMC3, TAF1, KAT2A, STAT3, GTF3C2, SIN3A, BDP1, PHC1, and EGR1 are the main central regulators of DEGs in mSSCs. In addition, we collectively detected two significant protein complexes in the protein-protein interactions network for DEGs regulators. Finally, this study introduces the major upstream kinases for the main central regulators of DEGs and the components of core protein complexes. In conclusion, this study provides a molecular blueprint to uncover the molecular mechanisms behind the biology of SSCs and offers a list of candidate factors for cell type conversion approaches and production of germ cells.
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Affiliation(s)
| | - Parvin Heshmati
- Faculty of Dentistry, Department of Endodontics, Kermanshah University of Medical Sciences, Kermanshah, Iran
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29
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Gassei K, Sheng Y, Fayomi A, Mital P, Sukhwani M, Lin CC, Peters KA, Althouse A, Valli H, Orwig KE. DDX4-EGFP transgenic rat model for the study of germline development and spermatogenesis. Biol Reprod 2017; 96:707-719. [PMID: 28339678 PMCID: PMC5803776 DOI: 10.1095/biolreprod.116.142828] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 01/30/2017] [Indexed: 12/31/2022] Open
Abstract
Spermatogonial stem cells (SSC) are essential for spermatogenesis and male fertility. In addition, these adult tissue stem cells can be used as vehicles for germline modification in animal models and may have application for treating male infertility. To facilitate the investigation of SSCs and germ lineage development in rats, we generated a DEAD-box helicase 4 (DDX4) (VASA) promoter-enhanced green fluorescent protein (EGFP) reporter transgenic rat. Quantitative real-time polymerase chain reaction and immunofluorescence confirmed that EGFP was expressed in the germ cells of the ovaries and testes and was absent in somatic cells and tissues. Germ cell transplantation demonstrated that the EGFP-positive germ cell population from DDX4-EGFP rat testes contained SSCs capable of establishing spermatogenesis in experimentally infertile mouse recipient testes. EGFP-positive germ cells could be easily isolated by fluorescence-activated cells sorting, while simultaneously removing testicular somatic cells from DDX4-EGFP rat pup testes. The EGFP-positive fraction provided an optimal cell suspension to establish rat SSC cultures that maintained long-term expression of zinc finger and BTB domain containing 16 (ZBTB16) and spalt-like transcription factor 4 (SALL4), two markers of mouse SSCs that are conserved in rats. The novel DDX4-EGFP germ cell reporter rat described here combined with previously described GCS-EGFP rats, rat SSC culture and gene editing tools will improve the utility of the rat model for studying stem cells and germ lineage development.
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Affiliation(s)
- Kathrin Gassei
- Department of Obstetrics, Gynecology and Reproductive Sciences and Magee-Womens Research Institute, University of Pittsburgh School of Medicine, Pittsburgh, USA
| | - Yi Sheng
- Department of Obstetrics, Gynecology and Reproductive Sciences and Magee-Womens Research Institute, University of Pittsburgh School of Medicine, Pittsburgh, USA
| | | | - Payal Mital
- Sawai Man Singh Medical College and Hospital, Jaipur, India
| | - Meena Sukhwani
- Department of Obstetrics, Gynecology and Reproductive Sciences and Magee-Womens Research Institute, University of Pittsburgh School of Medicine, Pittsburgh, USA
| | - Chih-Cheng Lin
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China
| | - Karen A Peters
- Biology Department, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Andrew Althouse
- Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Hanna Valli
- Department of Molecular Genetics and Developmental Biology Graduate Program, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.,Magee-Womens Research Institute, Pittsburgh, Pennsylvania, USA
| | - Kyle E Orwig
- Department of Obstetrics, Gynecology and Reproductive Sciences and Magee-Womens Research Institute, University of Pittsburgh School of Medicine, Pittsburgh, USA
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30
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Helsel AR, Oatley MJ, Oatley JM. Glycolysis-Optimized Conditions Enhance Maintenance of Regenerative Integrity in Mouse Spermatogonial Stem Cells during Long-Term Culture. Stem Cell Reports 2017; 8:1430-1441. [PMID: 28392219 PMCID: PMC5425612 DOI: 10.1016/j.stemcr.2017.03.004] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 03/06/2017] [Accepted: 03/07/2017] [Indexed: 02/08/2023] Open
Abstract
The application of spermatogonial stem cell (SSC) transplantation for regenerating male fertility requires amplification of SSC number in vitro during which the integrity to re-establish spermatogenesis must be preserved. Conventional conditions supporting proliferation of SSCs from mouse pups have been the basis for developing methodology with adult human cells but are unrefined. We found that the integrity to regenerate spermatogenesis after transplantation declines with advancing time in primary cultures of pup SSCs and that the efficacy of deriving cultures from adult SSCs is limited with conventional conditions. To address these deficiencies, we optimized the culture environment to favor glycolysis as the primary bioenergetics process. In these conditions, regenerative integrity of pup and adult SSCs was significantly improved and the efficiency of establishing primary cultures was 100%. Collectively, these findings suggest that SSCs are primed for conditions favoring glycolytic activity, and matching culture environments to their bioenergetics is critical for maintaining functional integrity. Regenerative integrity of SSCs declines over time in conventional culture Glycolysis-optimized (GO) culture improves regenerative integrity of SSCs GO conditions enhance the long-term culture of SSCs from adult mice
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Affiliation(s)
- Aileen R Helsel
- Center for Reproductive Biology, School of Molecular Biosciences, College of Veterinary Medicine, Washington State University, Pullman, WA 99164, USA
| | - Melissa J Oatley
- Center for Reproductive Biology, School of Molecular Biosciences, College of Veterinary Medicine, Washington State University, Pullman, WA 99164, USA
| | - Jon M Oatley
- Center for Reproductive Biology, School of Molecular Biosciences, College of Veterinary Medicine, Washington State University, Pullman, WA 99164, USA.
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31
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An Activating STAT3 Mutation Causes Neonatal Diabetes through Premature Induction of Pancreatic Differentiation. Cell Rep 2017; 19:281-294. [DOI: 10.1016/j.celrep.2017.03.055] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 02/10/2017] [Accepted: 03/17/2017] [Indexed: 02/06/2023] Open
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32
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Potter SJ, DeFalco T. Role of the testis interstitial compartment in spermatogonial stem cell function. Reproduction 2017; 153:R151-R162. [PMID: 28115580 DOI: 10.1530/rep-16-0588] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 12/22/2016] [Accepted: 01/23/2017] [Indexed: 01/15/2023]
Abstract
Intricate cellular and molecular interactions ensure that spermatogonial stem cells (SSCs) proceed in a step-wise differentiation process through spermatogenesis and spermiogenesis to produce sperm. SSCs lie within the seminiferous tubule compartment, which provides a nurturing environment for the development of sperm. Cells outside of the tubules, such as interstitial and peritubular cells, also help direct SSC activity. This review focuses on interstitial (interstitial macrophages, Leydig cells and vasculature) and peritubular (peritubular macrophages and peritubular myoid cells) cells and their role in regulating the SSC self-renewal and differentiation in mammals. Leydig cells, the major steroidogenic cells in the testis, influence SSCs through secreted factors, such as insulin growth factor 1 (IGF1) and colony-stimulating factor 1 (CSF1). Macrophages interact with SSCs through various potential mechanisms, such as CSF1 and retinoic acid (RA), to induce the proliferation or differentiation of SSCs respectively. Vasculature influences SSC dynamics through CSF1 and vascular endothelial growth factor (VEGF) and by regulating oxygen levels. Lastly, peritubular myoid cells produce one of the most well-known factors that is required for SSC self-renewal, glial cell line-derived neurotrophic factor (GDNF), as well as CSF1. Overall, SSC interactions with interstitial and peritubular cells are critical for SSC function and are an important underlying factor promoting male fertility.
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Affiliation(s)
- Sarah J Potter
- Division of Reproductive SciencesCincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Tony DeFalco
- Division of Reproductive SciencesCincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
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33
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Helsel AR, Oatley JM. Transplantation as a Quantitative Assay to Study Mammalian Male Germline Stem Cells. Methods Mol Biol 2017; 1463:155-172. [PMID: 27734355 DOI: 10.1007/978-1-4939-4017-2_12] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In mammals, the activities of spermatogonial stem cells (SSCs) provide the foundation for continual spermatogenesis throughout a male's reproductive lifetime. At present, the defining characteristics of SSCs and mechanisms controlling their fate decisions are not well understood. Transplantation is a definitive functional measure of stem cell capacity for male germ cells that can be used as an assay to provide an unequivocal quantification of the SSC content in an experimental cell population. Here, we discuss the procedure for mice and provide protocols for preparing donor germ cell suspensions from testes directly or primary cultures of spermatogonia for transplantation, enriching for SSCs, preparing recipient males, microinjection into recipient testes, and considerations for experimental design.
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Affiliation(s)
- Aileen R Helsel
- Center for Reproductive Biology, School of Molecular Biosciences, College of Veterinary Medicine, Washington State University, Pullman, WA, USA
| | - Jon M Oatley
- Center for Reproductive Biology, School of Molecular Biosciences, College of Veterinary Medicine, Washington State University, Pullman, WA, USA.
- Center for Reproductive Biology, College of Veterinary Medicine, Washington State University, 647521, Pullman, WA, 99164-7521, USA.
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34
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The regulation of male fertility by the PTPN11 tyrosine phosphatase. Semin Cell Dev Biol 2016; 59:27-34. [DOI: 10.1016/j.semcdb.2016.01.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 01/15/2016] [Accepted: 01/18/2016] [Indexed: 01/04/2023]
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35
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Archer NP, Perez-Andreu V, Scheurer ME, Rabin KR, Peckham-Gregory EC, Plon SE, Zabriskie RC, De Alarcon PA, Fernandez KS, Najera CR, Yang JJ, Antillon-Klussmann F, Lupo PJ. Family-based exome-wide assessment of maternal genetic effects on susceptibility to childhood B-cell acute lymphoblastic leukemia in hispanics. Cancer 2016; 122:3697-3704. [PMID: 27529658 DOI: 10.1002/cncr.30241] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 05/31/2016] [Accepted: 07/06/2016] [Indexed: 11/11/2022]
Abstract
BACKGROUND Children of Hispanic ancestry have a higher incidence of acute lymphoblastic leukemia (ALL) compared with other ethnic groups, but to the authors' knowledge, the genetic basis for these racial disparities remain incompletely understood. Genome-wide association studies of childhood ALL to date have focused on inherited genetic effects; however, maternal genetic effects (the role of the maternal genotype on phenotype development in the offspring) also may play a role in ALL susceptibility. METHODS The authors conducted a family-based exome-wide association study of maternal genetic effects among Hispanics with childhood B-cell ALL using the Illumina Infinium HumanExome BeadChip. A discovery cohort of 312 Guatemalan and Hispanic American families and an independent replication cohort of 152 Hispanic American families were used. RESULTS Three maternal single-nucleotide polymorphisms (SNPs) approached the study threshold for significance after correction for multiple testing (P<1.0 × 10-6 ): MTL5 rs12365708 (testis expressed metallothionein-like protein [tesmin]) (relative risk [RR], 2.62; 95% confidence interval [95% CI], 1.61-4.27 [P = 1.8 × 10-5 ]); ALKBH1 rs6494 (AlkB homolog 1, histone H2A dioxygenase) (RR, 3.77; 95% CI, 1.84-7.74 [P = 3.7 × 10-5 ]); and NEUROG3 rs4536103 (neurogenin 3) (RR, 1.75; 95% CI, 1.30-2.37 [P = 1.2 × 10-4 ]). Although effect sizes were similar, these SNPs were not nominally significant in the replication cohort in the current study. In a meta-analysis comprised of the discovery cohort and the replication cohort, these SNPs were still not found to be statistically significant after correction for multiple comparisons (rs12365708: pooled RR, 2.27 [95% CI, 1.48-3.50], P = 1.99 × 10-4 ; rs6494: pooled RR, 2.31 [95% CI, 1.38-3.85], P = .001; and rs4536103: pooled RR, 1.67 [95% CI, 1.29-2.16] P = 9.23 × 10-5 ). CONCLUSIONS In what to the authors' knowledge is the first family-based based exome-wide association study to investigate maternal genotype effects associated with childhood ALL, the results did not implicate a strong role of maternal genotype on disease risk among Hispanics; however, 3 maternal SNPs were identified that may play a modest role in susceptibility. Cancer 2016;122:3697-704. © 2016 American Cancer Society.
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Affiliation(s)
- Natalie P Archer
- Austin Regional Campus, University of Texas School of Public Health, Austin, Texas
| | - Virginia Perez-Andreu
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee.,Hematologic Malignancies Program, Comprehensive Cancer Center, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Michael E Scheurer
- Section of Hematology-Oncology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | - Karen R Rabin
- Section of Hematology-Oncology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | - Erin C Peckham-Gregory
- Section of Hematology-Oncology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | - Sharon E Plon
- Section of Hematology-Oncology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | - Ryan C Zabriskie
- Section of Hematology-Oncology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | - Pedro A De Alarcon
- Department of Pediatrics, University of Illinois College of Medicine at Peoria, Peoria, Illinois
| | - Karen S Fernandez
- Department of Pediatrics, University of Illinois College of Medicine at Peoria, Peoria, Illinois
| | - Cesar R Najera
- National Pediatric Oncology Unit, Guatemala City, Guatemala
| | - Jun J Yang
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee.,Hematologic Malignancies Program, Comprehensive Cancer Center, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Federico Antillon-Klussmann
- National Pediatric Oncology Unit, Guatemala City, Guatemala.,School of Medicine, Francisco Marroquin University, Guatemala City, Guatemala
| | - Philip J Lupo
- Section of Hematology-Oncology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas
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36
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Production of fertile sperm from in vitro propagating enriched spermatogonial stem cells of farmed catfish, Clarias batrachus. ZYGOTE 2016; 24:814-824. [DOI: 10.1017/s0967199416000149] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
SummarySpermatogenesis is a highly co-ordinated and complex process. In vitro propagation of spermatogonial stem cells (SSCs) could provide an avenue in which to undertake in vivo studies of spermatogenesis. Very little information is known about the SSC biology of teleosts. In this study, collagenase-treated testicular cells of farmed catfish (Clarias batrachus, popularly known as magur) were purified by Ficoll gradient centrifugation followed by magnetic activated cell sorting using Thy1.2 (CD90.2) antibody to enrich for the spermatogonial cell population. The sorted spermatogonial cells were counted and gave ~3 × 106 cells from 6 × 106 pre-sorted cells. The purified cells were cultured in vitro for >2 months in L-15 medium containing fetal bovine serum (10%), carp serum (1%) and other supplements. Microscopic observations depicted typical morphological SSC features, bearing a larger nuclear compartment (with visible perinuclear bodies) within a thin rim of cytoplasm. Cells proliferated in vitro forming clumps/colonies. mRNA expression profiling by qPCR documented that proliferating cells were Plzf + and Pou2+, indicative of stem cells. From 60 days onwards of cultivation, the self-renewing population differentiated to produce spermatids (~6 × 107 on day 75). In vitro-produced sperm (2260 sperm/SSC) were free swimming in medium and hence motile (non-progressive) in nature. Of those, 2% were capable of fertilizing and generated healthy diploid fingerlings. Our documented evidence provides the basis for producing fertile magur sperm in vitro from cultured magur SSCs. Our established techniques of SSC propagation and in vitro sperm production together should trigger future in vivo experiments towards basic and applied biology research.
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37
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Arnheim N, Calabrese P. Germline Stem Cell Competition, Mutation Hot Spots, Genetic Disorders, and Older Fathers. Annu Rev Genomics Hum Genet 2016; 17:219-43. [PMID: 27070266 DOI: 10.1146/annurev-genom-083115-022656] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Some de novo human mutations arise at frequencies far exceeding the genome average mutation rate. Examples include the common mutations at one or a few sites in the genes that cause achondroplasia, Apert syndrome, multiple endocrine neoplasia type 2B, and Noonan syndrome. These mutations are recurrent, provide a gain of function, are paternally derived, and are more likely to be transmitted as the father ages. Recent experiments have tested whether the high mutation frequencies are due to an elevated mutation rate per cell division, as expected, or to an advantage of the mutant spermatogonial stem cells over wild-type stem cells. The evidence, which includes the surprising discovery of testis mutation clusters, rules out the former model but not the latter. We propose how the mutations might alter spermatogonial stem cell function and discuss how germline selection contributes to the paternal age effect, the human mutational load, and adaptive evolution.
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Affiliation(s)
- Norman Arnheim
- Molecular and Computational Biology Program, University of Southern California, Los Angeles, California 90089-2910; ,
| | - Peter Calabrese
- Molecular and Computational Biology Program, University of Southern California, Los Angeles, California 90089-2910; ,
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Proinflammatory Cytokines Induce Endocrine Differentiation in Pancreatic Ductal Cells via STAT3-Dependent NGN3 Activation. Cell Rep 2016; 15:460-470. [PMID: 27068459 DOI: 10.1016/j.celrep.2016.03.036] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 02/18/2016] [Accepted: 03/09/2016] [Indexed: 12/16/2022] Open
Abstract
A major goal of diabetes research is to develop strategies that replenish pancreatic insulin-producing beta cells. One emerging strategy is to harness pancreatic plasticity-the ability of pancreatic cells to undergo cellular interconversions-a phenomenon implicated in physiological stress and pancreatic injury. Here, we investigate the effects of inflammatory cytokine stress on the differentiation potential of ductal cells in a human cell line, in mouse ductal cells by pancreatic intraductal injection, and during the progression of autoimmune diabetes in the non-obese diabetic (NOD) mouse model. We find that inflammatory cytokine insults stimulate epithelial-to-mesenchymal transition (EMT) as well as the endocrine program in human pancreatic ductal cells via STAT3-dependent NGN3 activation. Furthermore, we show that inflammatory cytokines activate ductal-to-endocrine cell reprogramming in vivo independent of hyperglycemic stress. Together, our findings provide evidence that inflammatory cytokines direct ductal-to-endocrine cell differentiation, with implications for beta cell regeneration.
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Mei XX, Wang J, Wu J. Extrinsic and intrinsic factors controlling spermatogonial stem cell self-renewal and differentiation. Asian J Androl 2016; 17:347-54. [PMID: 25657085 PMCID: PMC4430931 DOI: 10.4103/1008-682x.148080] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Spermatogonial stem cells (SSCs), the stem cells responsible for male fertility, are one of a small number of cells with the abilities of both self-renewal and generation of large numbers of haploid cells. Technology improvements, most importantly, transplantation assays and in vitro culture systems have greatly expanded our understanding of SSC self-renewal and differentiation. Many important molecules crucial for the balance between self-renewal and differentiation have been recently identified although the exact mechanism(s) remain largely undefined. In this review, we give a brief introduction to SSCs, and then focus on extrinsic and intrinsic factors controlling SSCs self-renewal and differentiation.
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Affiliation(s)
| | | | - Ji Wu
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio X Institutes, Shanghai Jiao Tong University, Shanghai 200240; Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, Ningxia Medical University, Yinchuan 750004; Shanghai Key Laboratory of Reproductive Medicine, Shanghai 200025, China
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Xie R, Lin X, Du T, Xu K, Shen H, Wei F, Hao W, Lin T, Lin X, Qin Y, Wang H, Chen L, Yang S, Yang J, Rong X, Yao K, Xiao D, Jia J, Sun Y. Targeted Disruption of miR-17-92 Impairs Mouse Spermatogenesis by Activating mTOR Signaling Pathway. Medicine (Baltimore) 2016; 95:e2713. [PMID: 26886608 PMCID: PMC4998608 DOI: 10.1097/md.0000000000002713] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The miR-17-92 cluster and its 6 different mature microRNAs, including miR-17, miR-18a, miR-19a, miR-20a, miR-19b-1, and miR-92a, play important roles in embryo development, immune system, kidney and heart development, adipose differentiation, aging, and tumorigenicity. Currently, increasing evidence indicates that some members of miR-17-92 cluster may be critical players in spermatogenesis, including miR-17, miR-18a, and miR-20a. However, the roles and underlying mechanisms of miR-17-92 in spermatogenesis remain largely unknown. Our results showed that the targeted disruption of miR-17-92 in the testes of adult mice resulted in severe testicular atrophy, empty seminiferous tubules, and depressed sperm production. This phenotype is partly because of the reduced number of spermatogonia and spermatogonial stem cells, and the significantly increased germ cell apoptosis in the testes of miR-17-92-deficient mice. In addition, overactivation of the mammalian target of rapamycin signaling pathway and upregulation of the pro-apoptotic protein Bim, Stat3, c-Kit, and Socs3 were also observed in miR-17-92-deficient mouse testes, which might be, at least partially if not all, responsible for the aforementioned phenotypic changes in mutant testes. Taken together, these findings suggest that miR-17-92 is essential for normal spermatogenesis in mice.
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Affiliation(s)
- Raoying Xie
- From the Cancer Research Institute, Southern Medical University (RX, XL, HS, FW, WH, TL, XL, YQ, HW, LC, SY, JY, KY, DX, JJ); Institute of Comparative Medicine and Laboratory Animal Center, Southern Medical University (RX, DX); Zhongshan School of Medicine, Sun Yat-sen University (YS); Department of Endocrinology, The Second Affiliated Hospital, Guangzhou Medical University (TD); Department of General Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou (KX); Department of Chemoradiotherapy, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou (RX); Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University (KX); Department of Oncology, Nanfang Hospital, Southern Medical University (XR); and Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, China (FW)
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Abstract
Mammalian spermatogenesis is a complex and highly ordered process by which male germ cells proceed through a series of differentiation steps to produce haploid flagellated spermatozoa. Underlying this process is a pool of adult stem cells, the spermatogonial stem cells (SSCs), which commence the spermatogenic lineage by undertaking a differentiation fate decision to become progenitor spermatogonia. Subsequently, progenitors acquire a differentiating spermatogonia phenotype and undergo a series of amplifying mitoses while becoming competent to enter meiosis. After spermatocytes complete meiosis, post-meiotic spermatids must then undergo a remarkable transformation from small round spermatids to a flagellated spermatozoa with extremely compacted nuclei. This chapter reviews the current literature pertaining to spermatogonial differentiation with an emphasis on the mechanisms controlling stem cell fate decisions and early differentiation events in the life of a spermatogonium.
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Affiliation(s)
- Jennifer M Mecklenburg
- Department of Biology, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
| | - Brian P Hermann
- Department of Biology, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA.
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Lambrot R, Lafleur C, Kimmins S. The histone demethylase KDM1A is essential for the maintenance and differentiation of spermatogonial stem cells and progenitors. FASEB J 2015; 29:4402-16. [PMID: 26243864 DOI: 10.1096/fj.14-267328] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 06/22/2015] [Indexed: 12/22/2022]
Abstract
Little is known of the fundamental processes governed by epigenetic mechanisms in the supplier cells of spermatogenesis, the spermatogonial stem cells (SSCs). The histone H3 lysine demethylase KDM1A is expressed in spermatogonia. We hypothesized that KDM1A serves in transcriptional regulation of SSCs and fertility. Using a conditional deletion of Kdm1a [conditional knockout (cKO)] in mouse spermatogonia, we determined that Kdm1a is essential for spermatogenesis as adult cKO males completely lack germ cells. Analysis of postnatal testis development revealed that undifferentiated and differentiating spermatogonial populations form in Kdm1a-cKO animals, yet the majority fail to enter meiosis. Loss of germ cells in the cKO was rapid with none remaining by postnatal day (PND) 21. To gain insight into the mechanistic implications of Kdm1a ablation, we isolated PND 6 spermatogonia enriched for SSCs and analyzed their transcriptome by RNA sequencing. Loss of Kdm1a was associated with altered transcription of 1206 genes. Importantly, differentially expressed genes between control and Kdm1a-cKO animals included those that are essential for SSC and progenitor maintenance and spermatogonial differentiation. The complete loss of fertility and failure to establish spermatogenesis indicate that Kdm1a is a master controller of gene transcription in spermatogonia and is required for SSC and progenitor maintenance and differentiation.
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Affiliation(s)
- Romain Lambrot
- *Department of Animal Science, McGill University, Sainte Anne de Bellevue, Quebec, Canada; and Department of Pharmacology and Therapeutics, McGill University, Montreal, Quebec, Canada
| | - Christine Lafleur
- *Department of Animal Science, McGill University, Sainte Anne de Bellevue, Quebec, Canada; and Department of Pharmacology and Therapeutics, McGill University, Montreal, Quebec, Canada
| | - Sarah Kimmins
- *Department of Animal Science, McGill University, Sainte Anne de Bellevue, Quebec, Canada; and Department of Pharmacology and Therapeutics, McGill University, Montreal, Quebec, Canada
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Nickkholgh B, Korver CM, van Daalen SKM, van Pelt AMM, Repping S. AZFc deletions do not affect the function of human spermatogonia in vitro. Mol Hum Reprod 2015; 21:553-62. [PMID: 25901025 PMCID: PMC5009458 DOI: 10.1093/molehr/gav022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 03/13/2015] [Accepted: 04/07/2015] [Indexed: 01/12/2023] Open
Abstract
Azoospermic factor c (AZFc) deletions are the underlying cause in 10% of azoo- or severe oligozoospermia. Through extensive molecular analysis the precise genetic content of the AZFc region and the origin of its deletion have been determined. However, little is known about the effect of AZFc deletions on the functionality of germ cells at various developmental steps. The presence of normal, fertilization-competent sperm in the ejaculate and/or testis of the majority of men with AZFc deletions suggests that the process of differentiation from spermatogonial stem cells (SSCs) to mature spermatozoa can take place in the absence of the AZFc region. To determine the functionality of AZFc-deleted spermatogonia, we compared in vitro propagated spermatogonia from six men with complete AZFc deletions with spermatogonia from three normozoospermic controls. We found that spermatogonia of AZFc-deleted men behave similar to controls during culture. Short-term (18 days) and long-term (48 days) culture of AZFc-deleted spermatogonia showed the same characteristics as non-deleted spermatogonia. This similarity was revealed by the same number of passages, the same germ cell clusters formation and similar level of genes expression of spermatogonial markers including ubiquitin carboxyl-terminal esterase L1 (UCHL1), zinc finger and BTB domain containing 16 (ZBTB16) and glial cell line-derived neurotrophic factor family receptor alpha 1 (GFRA1), as well as germ cell differentiation markers including signal transducer and activator of transcription 3 (STAT3), spermatogenesis and oogenesis specific basic helix-loophelix 2 (SOHLH2), v-kit Hardy-Zuckerman 4 feline sarcoma viral oncogene homolog (KIT) and synaptonemal complex protein 3 (SYCP3). The only exception was melanoma antigen family A4 (MAGEA4) which showed significantly lower expression in AZFc-deleted samples than controls in short-term culture while in long-term culture it was hardly detected in both AZFc-deleted and control spermatogonia. These data suggest that, at least in vitro, spermatogonia of AZFc-deleted men are functionally similar to spermatogonia from non-deleted men. Potentially, this enables treatment of men with AZFc deletions by propagating their SSCs in vitro and autotransplanting these SSCs back to the testes to increase sperm counts and restore fertility.
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Affiliation(s)
- B Nickkholgh
- Center for Reproductive Medicine, Women's and Children's Hospital, Academic Medical Center, University of Amsterdam, Amsterdam 1105AZ, The Netherlands Present address: Wake Forest Institute for Regenerative Medicine, Wake Forest University school of Medicine, Winston-Salem, 27101 NC, USA
| | - C M Korver
- Center for Reproductive Medicine, Women's and Children's Hospital, Academic Medical Center, University of Amsterdam, Amsterdam 1105AZ, The Netherlands
| | - S K M van Daalen
- Center for Reproductive Medicine, Women's and Children's Hospital, Academic Medical Center, University of Amsterdam, Amsterdam 1105AZ, The Netherlands
| | - A M M van Pelt
- Center for Reproductive Medicine, Women's and Children's Hospital, Academic Medical Center, University of Amsterdam, Amsterdam 1105AZ, The Netherlands
| | - S Repping
- Center for Reproductive Medicine, Women's and Children's Hospital, Academic Medical Center, University of Amsterdam, Amsterdam 1105AZ, The Netherlands
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Hyakutake K, Kawasaki T, Zhang J, Kubota H, Abe SI, Takamune K. Asymmetrical allocation of JAK1 mRNA during spermatogonial stem cell division in Xenopus laevis. Dev Growth Differ 2015; 57:389-399. [PMID: 25988600 DOI: 10.1111/dgd.12219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 03/30/2015] [Accepted: 04/15/2015] [Indexed: 01/15/2023]
Abstract
During Xenopus spermatogenesis, each primary spermatogonium (PG), the largest single cell in the testis, undergoes mitotic divisions with a concomitant decrease in size to produce smaller differentiating spermatogonia. The spermatogonial stem cells (SSCs) occur in this PG population. Taking advantage of identifiable and isolatable properties of Xenopus SSCs, we examined JAK1 gene expression during the spermatogenesis because there have been reports on the important role of JAK/STAT pathway in regulating the status of SSCs in Drosophila and mouse. Surprisingly, in situ hybridization revealed the presence of JAK1 mRNA in the differentiating spermatogonia and primary spermatocytes as well as some PGs. Inhibition of JAK1 activity in the testis caused a decrease in percentage of BrdU-incorporating spermatogonia, suggesting that JAK1 was at least involved in regulation of spermatogonial proliferation. Interestingly, single cell reverse transcription-polymerase chain reaction (RT-PCR) clearly showed two different types of SSCs: SSCs with JAK1 mRNA (JAK1+ ) or without JAK1 mRNA (JAK1- ). Since JAK1- SSC level was increased by induction of testis regeneration, self-renewing SSCs were thought to be JAK1- . In addition, we found barrel-shaped PGs, in which JAK1 mRNA was localized asymmetrically to one half of the cell. The stainability with propidium iodide and morphology of two nuclei in the barrel-shaped PG were similar to those of PG nucleus. Based on the above observations, we propose the hypothesis that JAK1+ SSC is preparing for production of PGs destined to differentiate (destined PGs) and the accumulated JAK1 mRNA in the SSC is distributed exclusively into the destined PGs through mitotic division.
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Affiliation(s)
- Keiichiro Hyakutake
- Department of Biological Science, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto, 860-8555, Japan
| | - Toshihiro Kawasaki
- Genetic Strains Research Center, National Institute of Genetics, 1111 Yata, Mishima, 411-8540, Japan
| | - JiDong Zhang
- Department of Biological Science, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto, 860-8555, Japan
| | - Hiroshi Kubota
- Department of New Frontier Sciences, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto, 860-8555, Japan
| | - Sin-Ichi Abe
- Department of Biological Science, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto, 860-8555, Japan
| | - Kazufumi Takamune
- Department of Biological Science, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto, 860-8555, Japan
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Manku G, Culty M. Mammalian gonocyte and spermatogonia differentiation: recent advances and remaining challenges. Reproduction 2015; 149:R139-57. [DOI: 10.1530/rep-14-0431] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The production of spermatozoa relies on a pool of spermatogonial stem cells (SSCs), formed in infancy from the differentiation of their precursor cells, the gonocytes. Throughout adult life, SSCs will either self-renew or differentiate, in order to maintain a stem cell reserve while providing cells to the spermatogenic cycle. By contrast, gonocytes represent a transient and finite phase of development leading to the formation of SSCs or spermatogonia of the first spermatogenic wave. Gonocyte development involves phases of quiescence, cell proliferation, migration, and differentiation. Spermatogonia, on the other hand, remain located at the basement membrane of the seminiferous tubules throughout their successive phases of proliferation and differentiation. Apoptosis is an integral part of both developmental phases, allowing for the removal of defective cells and the maintenance of proper germ–Sertoli cell ratios. While gonocytes and spermatogonia mitosis are regulated by distinct factors, they both undergo differentiation in response to retinoic acid. In contrast to postpubertal spermatogenesis, the early steps of germ cell development have only recently attracted attention, unveiling genes and pathways regulating SSC self-renewal and proliferation. Yet, less is known on the mechanisms regulating differentiation. The processes leading from gonocytes to spermatogonia have been seldom investigated. While the formation of abnormal gonocytes or SSCs could lead to infertility, defective gonocyte differentiation might be at the origin of testicular germ cell tumors. Thus, it is important to better understand the molecular mechanisms regulating these processes. This review summarizes and compares the present knowledge on the mechanisms regulating mammalian gonocyte and spermatogonial differentiation.
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Chan F, Oatley MJ, Kaucher AV, Yang QE, Bieberich CJ, Shashikant CS, Oatley JM. Functional and molecular features of the Id4+ germline stem cell population in mouse testes. Genes Dev 2014; 28:1351-62. [PMID: 24939937 PMCID: PMC4066404 DOI: 10.1101/gad.240465.114] [Citation(s) in RCA: 162] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Chan et al. generated transgenic mice in which spermatogonial stem cells expressed an Id4-Gfp transgene. Id4-Gfp+ cells exist primarily as a subset of the type Asingle pool and eventually comprise ∼2% of the undifferentiated spermatogonial population in adulthood. RNA sequencing analysis revealed genes whose expression is unique for the Id4-Gfp+/stem cell and Id4-Gfp−/progenitor fractions. These findings provide evidence that stem cells exist as a rare subset of the Asingle pool and reveal transcriptome features distinguishing stem cell and progenitor states within the mammalian male germline. The maintenance of cycling cell lineages relies on undifferentiated subpopulations consisting of stem and progenitor pools. Features that delineate these cell types are undefined for many lineages, including spermatogenesis, which is supported by an undifferentiated spermatogonial population. Here, we generated a transgenic mouse line in which spermatogonial stem cells are marked by expression of an inhibitor of differentiation 4 (Id4)-green fluorescent protein (Gfp) transgene. We found that Id4-Gfp+ cells exist primarily as a subset of the type Asingle pool, and their frequency is greatest in neonatal development and then decreases in proportion during establishment of the spermatogenic lineage, eventually comprising ∼2% of the undifferentiated spermatogonial population in adulthood. RNA sequencing analysis revealed that expression of 11 and 25 genes is unique for the Id4-Gfp+/stem cell and Id4-Gfp−/progenitor fractions, respectively. Collectively, these findings provide the first definitive evidence that stem cells exist as a rare subset of the Asingle pool and reveal transcriptome features distinguishing stem cell and progenitor states within the mammalian male germline.
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Affiliation(s)
- Frieda Chan
- School of Molecular Biosciences, Center for Reproductive Biology, College of Veterinary Medicine, Washington State University, Pullman, Washington 99164, USA
| | - Melissa J Oatley
- School of Molecular Biosciences, Center for Reproductive Biology, College of Veterinary Medicine, Washington State University, Pullman, Washington 99164, USA
| | - Amy V Kaucher
- School of Molecular Biosciences, Center for Reproductive Biology, College of Veterinary Medicine, Washington State University, Pullman, Washington 99164, USA
| | - Qi-En Yang
- School of Molecular Biosciences, Center for Reproductive Biology, College of Veterinary Medicine, Washington State University, Pullman, Washington 99164, USA
| | - Charles J Bieberich
- Department of Biological Sciences, University of Maryland at Baltimore County, Baltimore, Maryland 21250, USA
| | - Cooduvalli S Shashikant
- Department of Animal Science, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Jon M Oatley
- School of Molecular Biosciences, Center for Reproductive Biology, College of Veterinary Medicine, Washington State University, Pullman, Washington 99164, USA
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Liao HF, Chen WSC, Chen YH, Kao TH, Tseng YT, Lee CY, Chiu YC, Lee PL, Lin QJ, Ching YH, Hata K, Cheng WTK, Tsai MH, Sasaki H, Ho HN, Wu SC, Huang YH, Yen P, Lin SP. DNMT3L promotes quiescence in postnatal spermatogonial progenitor cells. Development 2014; 141:2402-13. [PMID: 24850856 DOI: 10.1242/dev.105130] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The ability of adult stem cells to reside in a quiescent state is crucial for preventing premature exhaustion of the stem cell pool. However, the intrinsic epigenetic factors that regulate spermatogonial stem cell quiescence are largely unknown. Here, we investigate in mice how DNA methyltransferase 3-like (DNMT3L), an epigenetic regulator important for interpreting chromatin context and facilitating de novo DNA methylation, sustains the long-term male germ cell pool. We demonstrated that stem cell-enriched THY1(+) spermatogonial stem/progenitor cells (SPCs) constituted a DNMT3L-expressing population in postnatal testes. DNMT3L influenced the stability of promyelocytic leukemia zinc finger (PLZF), potentially by downregulating Cdk2/CDK2 expression, which sequestered CDK2-mediated PLZF degradation. Reduced PLZF in Dnmt3l KO THY1(+) cells released its antagonist, Sal-like protein 4A (SALL4A), which is associated with overactivated ERK and AKT signaling cascades. Furthermore, DNMT3L was required to suppress the cell proliferation-promoting factor SALL4B in THY1(+) SPCs and to prevent premature stem cell exhaustion. Our results indicate that DNMT3L is required to delicately balance the cycling and quiescence of SPCs. These findings reveal a novel role for DNMT3L in modulating postnatal SPC cell fate decisions.
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Affiliation(s)
- Hung-Fu Liao
- Institute of Biotechnology, National Taiwan University, Taipei 106, Taiwan Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Wendy S C Chen
- Institute of Biotechnology, National Taiwan University, Taipei 106, Taiwan Department of Animal Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Yu-Hsiang Chen
- Institute of Biotechnology, National Taiwan University, Taipei 106, Taiwan
| | - Tzu-Hao Kao
- Institute of Biotechnology, National Taiwan University, Taipei 106, Taiwan
| | - Yen-Tzu Tseng
- Institute of Biotechnology, National Taiwan University, Taipei 106, Taiwan
| | - Chien-Yueh Lee
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei 106, Taiwan
| | - Yu-Chiao Chiu
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei 106, Taiwan
| | - Pei-Lung Lee
- Institute of Biotechnology, National Taiwan University, Taipei 106, Taiwan
| | - Qian-Jia Lin
- Department of Biochemistry, Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University Hospital, Taipei Medical University, Taipei 110, Taiwan Center for Reproductive Medicine, Taipei Medical University Hospital, Taipei Medical University, Taipei 110, Taiwan
| | - Yung-Hao Ching
- Department of Molecular Biology and Human Genetics, Tzu Chi University, Hualien 97004, Taiwan
| | - Kenichiro Hata
- Department of Maternal-Fetal Biology, National Research Institute for Child Health and Development, Okura, Setagaya, Tokyo 157-8535, Japan
| | - Winston T K Cheng
- Department of Animal Science and Biotechnology, Tunghai University, Taichung 40704, Taiwan
| | - Mong-Hsun Tsai
- Institute of Biotechnology, National Taiwan University, Taipei 106, Taiwan
| | - Hiroyuki Sasaki
- Department of Molecular Genetics, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan
| | - Hong-Nerng Ho
- Department of Obstetrics and Gynecology, College of Medicine and the Hospital, National Taiwan University, Taipei 100, Taiwan
| | - Shinn-Chih Wu
- Department of Animal Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Yen-Hua Huang
- Department of Biochemistry, Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University Hospital, Taipei Medical University, Taipei 110, Taiwan Center for Reproductive Medicine, Taipei Medical University Hospital, Taipei Medical University, Taipei 110, Taiwan
| | - Pauline Yen
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Shau-Ping Lin
- Institute of Biotechnology, National Taiwan University, Taipei 106, Taiwan Agricultural Biotechnology Research Center, Academia Sinica, Taipei 115, Taiwan Center for Systems Biology, National Taiwan University, Taipei 106, Taiwan Research Center for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei 106, Taiwan
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Nishio H, Hayashi Y, Moritoki Y, Kamisawa H, Mizuno K, Kojima Y, Kohri K. Distinctive changes in histone H3K4 modification mediated via Kdm5a expression in spermatogonial stem cells of cryptorchid testes. J Urol 2014; 191:1564-72. [PMID: 24679876 DOI: 10.1016/j.juro.2013.10.071] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/21/2013] [Indexed: 01/07/2023]
Abstract
PURPOSE Gonocytes differentiate into spermatogonial stem cells, which make it possible to maintain spermatogenesis continuously throughout life. We previously reported attenuated spermatogonial stem cell activity in cryptorchid testes, which resulted in altered spermatogenesis and affected fertility. However, few groups have examined the differentiation process from gonocytes to spermatogonial stem cells. To clarify the underlying mechanisms comprehensively we performed microarray analysis to assess differential expression of transcripts between normal and undescended testes in juvenile rats. MATERIALS AND METHODS Using microarray analysis we compared whole mRNA expression of normal and cryptorchid testes in a rat model. We subsequently validated differential expression of candidate genes by real-time reverse transcriptase-polymerase chain reaction and performed immunohistochemistry. We also investigated the methylation status of histone H3K4 in cryptorchid testes and the GC-1 spermatogonial cell line. RESULTS We detected 24 up-regulated and 39 down-regulated genes. Of these genes Kdm5a expression was significantly higher in undescended testes. Immunohistochemistry showed that Kdm5a was localized in the nuclei of gonocytes, spermatogonia and spermatocytes. H3K4me2/me3 expression levels were decreased in undescended testes at 9 days postpartum. Furthermore, Kdm5a over expression in GC-1 cells led to increased expression of Esr2, Neurog3, Pou5f1, Ret and Thy1. CONCLUSIONS Recent investigations revealed that not only genetic but also epigenetic regulation has a role in spermatogenesis. Kdm5a is likely involved in the transformation of gonocytes into spermatogonial stem cells by transcriptional regulation of specific genes via H3K4 histone modification. To our knowledge this is the first report of epigenetic analysis of germ cell differentiation during early spermatogenesis.
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Affiliation(s)
- Hidenori Nishio
- Department of Nephro-Urology, Nagoya City University Graduate School of Medical Sciences, Nagoya and Department of Urology, Fukushima Medical University School of Medicine (YK), Fukushima, Japan
| | - Yutaro Hayashi
- Department of Nephro-Urology, Nagoya City University Graduate School of Medical Sciences, Nagoya and Department of Urology, Fukushima Medical University School of Medicine (YK), Fukushima, Japan.
| | - Yoshinobu Moritoki
- Department of Nephro-Urology, Nagoya City University Graduate School of Medical Sciences, Nagoya and Department of Urology, Fukushima Medical University School of Medicine (YK), Fukushima, Japan
| | - Hideyuki Kamisawa
- Department of Nephro-Urology, Nagoya City University Graduate School of Medical Sciences, Nagoya and Department of Urology, Fukushima Medical University School of Medicine (YK), Fukushima, Japan
| | - Kentaro Mizuno
- Department of Nephro-Urology, Nagoya City University Graduate School of Medical Sciences, Nagoya and Department of Urology, Fukushima Medical University School of Medicine (YK), Fukushima, Japan
| | - Yoshiyuki Kojima
- Department of Nephro-Urology, Nagoya City University Graduate School of Medical Sciences, Nagoya and Department of Urology, Fukushima Medical University School of Medicine (YK), Fukushima, Japan
| | - Kenjiro Kohri
- Department of Nephro-Urology, Nagoya City University Graduate School of Medical Sciences, Nagoya and Department of Urology, Fukushima Medical University School of Medicine (YK), Fukushima, Japan
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50
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Song HW, Wilkinson MF. Transcriptional control of spermatogonial maintenance and differentiation. Semin Cell Dev Biol 2014; 30:14-26. [PMID: 24560784 DOI: 10.1016/j.semcdb.2014.02.005] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 02/11/2014] [Indexed: 02/08/2023]
Abstract
Spermatogenesis is a multistep process that generates millions of spermatozoa per day in mammals. A key to this process is the spermatogonial stem cell (SSC), which has the dual property of continually renewing and undergoing differentiation into a spermatogonial progenitor that expands and further differentiates. In this review, we will focus on how these proliferative and early differentiation steps in mammalian male germ cells are controlled by transcription factors. Most of the transcription factors that have so far been identified as promoting SSC self-renewal (BCL6B, BRACHYURY, ETV5, ID4, LHX1, and POU3F1) are upregulated by glial cell line-derived neurotrophic factor (GDNF). Since GDNF is crucial for promoting SSC self-renewal, this suggests that these transcription factors are responsible for coordinating the action of GDNF in SSCs. Other transcription factors that promote SSC self-renewal are expressed independently of GDNF (FOXO1, PLZF, POU5F1, and TAF4B) and thus may act in non-GDNF pathways to promote SSC cell growth or survival. Several transcription factors have been identified that promote spermatogonial differentiation (DMRT1, NGN3, SOHLH1, SOHLH2, SOX3, and STAT3); some of these may influence the decision of an SSC to commit to differentiate while others may promote later spermatogonial differentiation steps. Many of these transcription factors regulate each other and act on common targets, suggesting they integrate to form complex transcriptional networks in self-renewing and differentiating spermatogonia.
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Affiliation(s)
- Hye-Won Song
- Department of Reproductive Medicine, School of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Miles F Wilkinson
- Department of Reproductive Medicine, School of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
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