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He L, Sun F, Wu Y, Li Z, Fu Y, Huang Q, Li J, Wang Z, Cai J, Feng C, Deng X, Gu H, He X, Yu J, Sun F. L(1)10Bb serves as a conservative determinant for soma-germline communications via cellular non-autonomous effects within the testicular stem cell niche. Mol Cell Endocrinol 2024; 591:112278. [PMID: 38795826 DOI: 10.1016/j.mce.2024.112278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 04/21/2024] [Accepted: 05/07/2024] [Indexed: 05/28/2024]
Abstract
The testicular stem cell niche is the central regulator of spermatogenesis in Drosophila melanogaster. However, the underlying regulatory mechanisms are unclear. This study demonstrated the crucial role of lethal (1) 10Bb [l(1)10Bb] in regulating the testicular stem cell niche. Dysfunction of l(1)10Bb in early-stage cyst cells led to male fertility disorders and compromised cyst stem cell maintenance. Moreover, the dysfunction of l(1)10Bb in early-stage cyst cells exerted non-autonomous effects on germline stem cell differentiation, independently of hub signals. Notably, our study highlights the rescue of testicular defects through ectopic expression of L(1)10Bb and the human homologous protein BUD31 homolog (BUD31). In addition, l(1)10Bb dysfunction in early-stage cyst cells downregulated the expression of spliceosome subunits in the Sm and the precursor RNA processing complexes. Collectively, our findings established l(1)10Bb as a pivotal factor in the modulation of Drosophila soma-germline communications within the testicular stem cell niche.
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Affiliation(s)
- Lei He
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, 226001, China
| | - Feiteng Sun
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, 226001, China
| | - Yunhao Wu
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, 226001, China
| | - Zhiran Li
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, 226001, China
| | - Yangbo Fu
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, 226001, China
| | - Qiuru Huang
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, 226001, China
| | - Jiaxin Li
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, 226001, China
| | - Zihan Wang
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, 226001, China
| | - Jiaying Cai
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, 226001, China
| | - Chenrui Feng
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, 226001, China
| | - Xiaonan Deng
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, 226001, China
| | - Han Gu
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, 226001, China
| | - Xuxin He
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, 226001, China
| | - Jun Yu
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, 226001, China.
| | - Fei Sun
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, 226001, China.
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2
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Duan X, Wang H, Cao Z, Su N, Wang Y, Zheng Y. Deficiency of ValRS-m Causes Male Infertility in Drosophila melanogaster. Int J Mol Sci 2024; 25:7489. [PMID: 39000597 PMCID: PMC11242588 DOI: 10.3390/ijms25137489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 06/25/2024] [Accepted: 07/01/2024] [Indexed: 07/16/2024] Open
Abstract
Drosophila spermatogenesis involves the renewal of germline stem cells, meiosis of spermatocytes, and morphological transformation of spermatids into mature sperm. We previously demonstrated that Ocnus (ocn) plays an essential role in spermatogenesis. The ValRS-m (Valyl-tRNA synthetase, mitochondrial) gene was down-regulated in ocn RNAi testes. Here, we found that ValRS-m-knockdown induced complete sterility in male flies. The depletion of ValRS-m blocked mitochondrial behavior and ATP synthesis, thus inhibiting the transition from spermatogonia to spermatocytes, and eventually, inducing the accumulation of spermatogonia during spermatogenesis. To understand the intrinsic reason for this, we further conducted transcriptome-sequencing analysis for control and ValRS-m-knockdown testes. The differentially expressed genes (DEGs) between these two groups were selected with a fold change of ≥2 or ≤1/2. Compared with the control group, 4725 genes were down-regulated (dDEGs) and 2985 genes were up-regulated (uDEGs) in the ValRS-m RNAi group. The dDEGs were mainly concentrated in the glycolytic pathway and pyruvate metabolic pathway, and the uDEGs were primarily related to ribosomal biogenesis. A total of 28 DEGs associated with mitochondria and 6 meiosis-related genes were verified to be suppressed when ValRS-m was deficient. Overall, these results suggest that ValRS-m plays a wide and vital role in mitochondrial behavior and spermatogonia differentiation in Drosophila.
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Affiliation(s)
- Xin Duan
- School of Life Sciences, Central China Normal University, Wuhan 430079, China; (X.D.); (H.W.); (Z.C.); (Y.W.)
| | - Haolin Wang
- School of Life Sciences, Central China Normal University, Wuhan 430079, China; (X.D.); (H.W.); (Z.C.); (Y.W.)
| | - Zhixian Cao
- School of Life Sciences, Central China Normal University, Wuhan 430079, China; (X.D.); (H.W.); (Z.C.); (Y.W.)
| | - Na Su
- School of Life Sciences, Shanghai Normal University, Shanghai 200234, China;
| | - Yufeng Wang
- School of Life Sciences, Central China Normal University, Wuhan 430079, China; (X.D.); (H.W.); (Z.C.); (Y.W.)
| | - Ya Zheng
- School of Life Sciences, Shanghai Normal University, Shanghai 200234, China;
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3
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Cui H, Huang Q, Li J, Zhou P, Wang Z, Cai J, Feng C, Deng X, Gu H, He X, Tang J, Wang X, Zhao X, Yu J, Chen X. Single-cell RNA sequencing analysis to evaluate antimony exposure effects on cell-lineage communications within the Drosophila testicular niche. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 270:115948. [PMID: 38184976 DOI: 10.1016/j.ecoenv.2024.115948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 12/28/2023] [Accepted: 01/03/2024] [Indexed: 01/09/2024]
Abstract
The increasing production and prevalence of antimony (Sb)-related products raise concerns regarding its potential hazards to reproductive health. Upon environmental exposure, Sb reportedly induces testicular toxicity during spermatogenesis; moreover, it is known to affect various testicular cell populations, particularly germline stem cell populations. However, the cell-cell communication resulting from Sb exposure within the testicular niche remains poorly understood. To address this gap, herein we analyzed testicular single-cell RNA sequencing data from Sb-exposed Drosophila. Our findings revealed that the epidermal growth factor receptor (EGFR) and WNT signaling pathways were associated with the stem cell niche in Drosophila testes, which may disrupt the homeostasis of the testicular niche in Drosophila. Furthermore, we identified several ligand-receptor pairs, facilitating the elucidation of intercellular crosstalk involved in Sb-mediated reproductive toxicology. We employed scRNA-seq analysis and conducted functional verification to investigate the expression patterns of core downstream factors associated with EGFR and WNT signatures in the testes under the influence of Sb exposure. Altogether, our results shed light on the potential mechanisms of Sb exposure-mediated testicular cell-lineage communications.
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Affiliation(s)
- Hongliang Cui
- Department of Urology, Nantong Hospital of Traditional Chinese Medicine, Nantong 226001, China
| | - Qiuru Huang
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong 226001, China
| | - Jiaxin Li
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong 226001, China
| | - Peiyao Zhou
- Department of Occupational Medicine and Environmental Toxicology, Nantong Key Laboratory of Environmental Toxicology, School of Public Health, Nantong University, Nantong 226019, China
| | - Zihan Wang
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong 226001, China
| | - Jiaying Cai
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong 226001, China
| | - Chenrui Feng
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong 226001, China
| | - Xiaonan Deng
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong 226001, China
| | - Han Gu
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong 226001, China
| | - Xuxin He
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong 226001, China
| | - Juan Tang
- Department of Occupational Medicine and Environmental Toxicology, Nantong Key Laboratory of Environmental Toxicology, School of Public Health, Nantong University, Nantong 226019, China
| | - Xiaoke Wang
- Department of Occupational Medicine and Environmental Toxicology, Nantong Key Laboratory of Environmental Toxicology, School of Public Health, Nantong University, Nantong 226019, China
| | - Xinyuan Zhao
- Department of Occupational Medicine and Environmental Toxicology, Nantong Key Laboratory of Environmental Toxicology, School of Public Health, Nantong University, Nantong 226019, China.
| | - Jun Yu
- Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong 226001, China.
| | - Xia Chen
- Department of Obstetrics and Gynecology, Nantong First People's Hospital, Affiliated Hospital 2 of Nantong University, Nantong University, Nantong 226001, China.
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Xu BY, Yu XL, Gao WX, Gao TT, Hu HY, Wu TT, Shen C, Huang XY, Zheng B, Wu YB. RNF187 governs the maintenance of mouse GC-2 cell development by facilitating histone H3 ubiquitination at K57/80. Asian J Androl 2023; 26:00129336-990000000-00147. [PMID: 38156805 PMCID: PMC11156453 DOI: 10.4103/aja202368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Accepted: 10/19/2023] [Indexed: 01/03/2024] Open
Abstract
RING finger 187 (RNF187), a ubiquitin-ligating (E3) enzyme, plays a crucial role in the proliferation of cancer cells. However, it remains unclear whether RNF187 exhibits comparable functionality in the development of germline cells. To investigate the potential involvement of RNF187 in germ cell development, we conducted interference and overexpression assays using GC-2 cells, a mouse spermatocyte-derived cell line. Our findings reveal that the interaction between RNF187 and histone H3 increases the viability, proliferation, and migratory capacity of GC-2 cells. Moreover, we provide evidence demonstrating that RNF187 interacts with H3 and mediates the ubiquitination of H3 at lysine 57 (K57) or lysine 80 (K80), directly or indirectly resulting in increased cellular transcription. This is a study to report the role of RNF187 in maintaining the development of GC-2 cells by mediating histone H3 ubiquitination, thus highlighting the involvement of the K57 and K80 residues of H3 in the epistatic regulation of gene transcription. These discoveries provide a new theoretical foundation for further comprehensive investigations into the function of RNF187 in the reproductive system.
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Affiliation(s)
- Bing-Ya Xu
- Human Reproductive and Genetic Center, Affiliated Hospital of Jiangnan University, Wuxi 214122, China
| | - Xiang-Ling Yu
- Human Reproductive and Genetic Center, Affiliated Hospital of Jiangnan University, Wuxi 214122, China
| | - Wen-Xin Gao
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing 211166, China
| | - Ting-Ting Gao
- Changzhou Maternal and Child Health Care Hospital, Changzhou Medical Center, Nanjing Medical University, Changzhou 213000, China
| | - Hao-Yue Hu
- Human Reproductive and Genetic Center, Affiliated Hospital of Jiangnan University, Wuxi 214122, China
| | - Tian-Tian Wu
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing 211166, China
| | - Cong Shen
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou 215002, China
| | - Xiao-Yan Huang
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing 211166, China
| | - Bo Zheng
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou 215002, China
| | - Yi-Bo Wu
- Human Reproductive and Genetic Center, Affiliated Hospital of Jiangnan University, Wuxi 214122, China
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5
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Huang Q, Chen X, Yu H, Ji L, Shi Y, Cheng X, Chen H, Yu J. Structure and molecular basis of spermatid elongation in the Drosophila testis. Open Biol 2023; 13:230136. [PMID: 37935354 PMCID: PMC10645079 DOI: 10.1098/rsob.230136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 09/26/2023] [Indexed: 11/09/2023] Open
Abstract
Spermatid elongation is a crucial event in the late stage of spermatogenesis in the Drosophila testis, eventually leading to the formation of mature sperm after meiosis. During spermatogenesis, significant structural and morphological changes take place in a cluster of post-meiotic germ cells, which are enclosed in a microenvironment surrounded by somatic cyst cells. Microtubule-based axoneme assembly, formation of individualization complexes and mitochondria maintenance are key processes involved in the differentiation of elongated spermatids. They provide important structural foundations for accessing male fertility. How these structures are constructed and maintained are basic questions in the Drosophila testis. Although the roles of several genes in different structures during the development of elongated spermatids have been elucidated, the relationships between them have not been widely studied. In addition, the genetic basis of spermatid elongation and the regulatory mechanisms involved have not been thoroughly investigated. In the present review, we focus on current knowledge with regard to spermatid axoneme assembly, individualization complex and mitochondria maintenance. We also touch upon promising directions for future research to unravel the underlying mechanisms of spermatid elongation in the Drosophila testis.
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Affiliation(s)
- Qiuru Huang
- Institute of Reproductive Medicine, Medical School of Nantong University, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Xia Chen
- Department of Obstetrics and Gynecology, Affiliated Hospital 2 of Nantong University, Nantong First People's Hospital, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Hao Yu
- Institute of Reproductive Medicine, Medical School of Nantong University, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Li Ji
- Institute of Reproductive Medicine, Medical School of Nantong University, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Yi Shi
- Institute of Reproductive Medicine, Medical School of Nantong University, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Xinmeng Cheng
- Institute of Reproductive Medicine, Medical School of Nantong University, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Hao Chen
- Institute of Reproductive Medicine, Medical School of Nantong University, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Jun Yu
- Institute of Reproductive Medicine, Medical School of Nantong University, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
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6
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Wu YB, Li SY, Liu JY, Xue JJ, Xu JF, Chen T, Cao TY, Zhou H, Wu TT, Dong CL, Qian WF, Qiao LW, Hou SY, Wang T, Shen C. Long non-coding RNA NRSN2-AS1 promotes ovarian cancer progression through targeting PTK2/β-catenin pathway. Cell Death Dis 2023; 14:696. [PMID: 37875515 PMCID: PMC10598275 DOI: 10.1038/s41419-023-06214-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 09/17/2023] [Accepted: 10/03/2023] [Indexed: 10/26/2023]
Abstract
As a common malignant tumor among women, ovarian cancer poses a serious threat to their health. This study demonstrates that long non-coding RNA NRSN2-AS1 is over-expressed in ovarian cancer tissues using patient sample and tissue microarrays. In addition, NRSN2-AS1 is shown to promote ovarian cancer cell proliferation and metastasis both in vitro and in vivo. Mechanistically, NRSN2-AS1 stabilizes protein tyrosine kinase 2 (PTK2) to activate the β-catenin pathway via repressing MG-53-mediated ubiquitinated degradation of PTK2, thereby facilitating ovarian cancer progression. Rescue experiments verify the function of the NRSN2-AS1/PTK2/β-catenin axis and the effects of MG53 on this axis in ovarian cancer cells. In conclusion, this study demonstrates the key role of the NRSN2-AS1/PTK2/β-catenin axis for the first time and explores its potential clinical applications in ovarian cancer.
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Affiliation(s)
- Yi-Bo Wu
- Human Reproductive and Genetic Center, Affiliated Hospital of Jiangnan University, Wuxi, 214122, China
| | - Shen-Yi Li
- Human Reproductive and Genetic Center, Affiliated Hospital of Jiangnan University, Wuxi, 214122, China
- Department of Obstetrics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, 215002, China
| | - Jin-Yan Liu
- Department of Breast and Thyroid Surgery, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, 215002, China
| | - Jia-Jia Xue
- Suzhou Dushu Lake Hospital (Dushu Lake Hospital Affiliated to Soochow University), Suzhou, 215124, China
| | - Jin-Fu Xu
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| | - Ting Chen
- Department of Gynaecology, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, 215002, China
| | - Tian-Yue Cao
- Department of Gynaecology, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, 215002, China
| | - Hui Zhou
- Human Reproductive and Genetic Center, Affiliated Hospital of Jiangnan University, Wuxi, 214122, China
| | - Tian-Tian Wu
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| | - Chun-Lin Dong
- Human Reproductive and Genetic Center, Affiliated Hospital of Jiangnan University, Wuxi, 214122, China
| | - Wei-Feng Qian
- Department of Breast and Thyroid Surgery, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, 215002, China
| | - Long-Wei Qiao
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, 215002, China.
| | - Shun-Yu Hou
- Department of Gynaecology, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, 215002, China.
| | - Ting Wang
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, 215002, China.
| | - Cong Shen
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, 215002, China.
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7
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Chen W, Yin Y, Zhang Z. Effects of N-acetylcysteine on CG8005 gene-mediated proliferation and apoptosis of Drosophila S2 embryonic cells. Sci Rep 2023; 13:12502. [PMID: 37532734 PMCID: PMC10397334 DOI: 10.1038/s41598-023-39668-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 07/28/2023] [Indexed: 08/04/2023] Open
Abstract
To investigate the effect of the antioxidant N-acetylcysteine (NAC) on the proliferation and apoptosis in CG8005 gene-interfering Drosophila S2 embryonic cells by scavenging intracellular reactive oxygen species (ROS). The interfering efficiency of CG8005 gene in Drosophila S2 embryonic cells was verified by real-time quantitative PCR (qRT-PCR). Different concentrations of NAC and phosphate buffered saline (PBS) were used to affect the Drosophila S2 embryonic cells. The growth state of Drosophila S2 embryonic cells was observed by light microscope. Two probes dihydroethidium (DHE) and 2,7-dichlorodihydrofluorescein-acetoacetate (DCFH-DA) were used to observe the ROS production in each group after immunofluorescence staining. TUNEL staining and flow cytometry were used to investigate the apoptosis level of Drosophila S2 embryos, and CCK-8 (Cell Counting Kit-8) was used to detect the cell viability of Drosophila S2 embryos. The knockdown efficiency of siCG8005-2 fragment was high and stable, which was verified by interference efficiency (P < 0.05). There was no significant change in the growth of Drosophila S2 embryonic cells after the treatment of NAC as compared to PBS group. Moreover, knockdowning CG8005 gene resulted in an increase in ROS and apoptosis in Drosophila S2 embryonic cells (P < 0.05) and a decrease in proliferation activity (P < 0.05). In addition, the pretreatment of antioxidant NAC could inhibit ROS production in Drosophila S2 embryonic cells (P < 0.05), reduce cell apoptosis (P < 0.05), and improve cell survival (P < 0.05). The CG8005 gene in Drosophila S2 embryonic cells could regulate the proliferation and apoptosis of S2 embryonic cells by disrupting the redox homeostasis, and antioxidant NAC could inhibit cell apoptosis and promotes cell proliferation by scavenging ROS in Drosophila S2 embryonic cells, which is expected to provide novel insights for the pathogenesis of male infertility and spermatogenesis.
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Affiliation(s)
- Wanyin Chen
- Department of Medical Gynecology, Affiliated Hospital of Jiangsu University, Zhenjiang, 212000, People's Republic of China
| | - Yifei Yin
- Department of Medical Ultrasound, Affiliated Hospital of Nantong University, Nantong, 226006, People's Republic of China.
| | - Zheng Zhang
- Department of Medical Ultrasound, Affiliated Hospital of Jiangsu University, Zhenjiang, 212000, People's Republic of China.
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RpS3 Is Required for Spermatogenesis of Drosophila melanogaster. Cells 2023; 12:cells12040573. [PMID: 36831240 PMCID: PMC9954509 DOI: 10.3390/cells12040573] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 02/03/2023] [Accepted: 02/08/2023] [Indexed: 02/12/2023] Open
Abstract
Ribosomal proteins (RPs) constitute the ribosome, thus participating in the protein biosynthesis process. Emerging studies have suggested that many RPs exhibit different expression levels across various tissues and function in a context-dependent manner for animal development. Drosophila melanogaster RpS3 encodes the ribosomal protein S3, one component of the 40S subunit of ribosomes. We found that RpS3 is highly expressed in the reproductive organs of adult flies and its depletion in male germline cells led to severe defects in sperm production and male fertility. Immunofluorescence staining showed that RpS3 knockdown had little effect on early germ cell differentiation, but strongly disrupted the spermatid elongation and individualization processes. Furthermore, we observed abnormal morphology and activity of mitochondrial derivatives in the elongating spermatids of RpS3-knockdown testes, which could cause the failure of axoneme elongation. We also found that RpS3 RNAi inhibited the formation of the individualization complex that takes charge of disassociating the spermatid bundle. In addition, excessive apoptotic cells were detected in the RpS3-knockdown testes, possibly to clean the defective spermatids. Together, our data demonstrated that RpS3 plays an important role in regulating spermatid elongation and individualization processes and, therefore, is required for normal Drosophila spermatogenesis.
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Xue J, Wu T, Huang C, Shu M, Shen C, Zheng B, Lv J. Identification of proline-rich protein 11 as a major regulator in mouse spermatogonia maintenance via an increase in BMI1 protein stability. Mol Biol Rep 2022; 49:9555-9564. [PMID: 35980531 DOI: 10.1007/s11033-022-07846-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 08/05/2022] [Indexed: 12/08/2022]
Abstract
BACKGROUND Spermatogenesis accompanied by self-renewal and differentiation of spermatogonia under complicated regulation is crucial for male fertility. Our previous study demonstrated that the loss of the B-lymphoma Mo-MLV insertion region 1 (BMI1) could cause male infertility and found a potential interaction between BMI1 and proline-rich protein 11 (PRR11); however, the specific co-regulatory effects of BMI1/PRR11 on spermatogonia maintenance remain unclear. METHODS AND RESULTS The expression of PRR11 was downregulated in a mouse spermatogonia cell line (GC-1) via transfection with PRR11-siRNAs, and PRR11 knockdown was verified by real-time reverse transcriptase polymerase chain reaction (RT-qPCR). The proliferative activity of GC-1 cells was determined using the cell counting kit (CCK-8), colony formation, and 5-ethynyl-2-deoxyuridine (EdU) incorporation assay. A Transwell assay was performed to evaluate the effects of PRR11 on GC-1 cell migration. A terminal deoxynucleotidyl transferase dUTP nick end labeling assay was used to measure GC-1 cell apoptosis. Furthermore, co-immunoprecipitation, RT-qPCR, and western blot analyses were used for investigating the regulatory mechanisms involved in this regulation. It was found that downregulation of PRR11 could cause a marked inhibition of proliferation and migration and induced apoptosis in GC-1 cells. Moreover, silencing of PRR11 obviously led to a reduction in the BMI1 protein level. PRR11 was found to interact with BMII at the endogenous protein level. PRR11 knockdown produced a decrease in BMI1 protein stability via an increase in BMI1 ubiquitination after which derepression in the transcription of protein tyrosine phosphatase receptor type M (Ptprm) occurred. Importantly, knockdown of Ptprm in PRR11-deficient GC-1 cells led to a reversal of proliferation and migration of GC-1 cells. CONCLUSIONS This study uncovered a novel mechanism by which PRR11 cooperated with BMI1 to facilitate GC-1 maintenance through targeting Ptprm. Our findings may provide a better understanding of the regulatory network in spermatogonia maintenance.
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Affiliation(s)
- Jiajia Xue
- Suzhou Dushu Lake Hospital (Dushu Lake Hospital Affiliated to Soochow University), Suzhou, 215124, China
| | - Tiantian Wu
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, 215002, China
- State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing, 211166, China
| | - Chao Huang
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, 215002, China
| | - Minghua Shu
- Suzhou Dushu Lake Hospital (Dushu Lake Hospital Affiliated to Soochow University), Suzhou, 215124, China
| | - Cong Shen
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, 215002, China
| | - Bo Zheng
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, 215002, China.
| | - Jinxing Lv
- Suzhou Dushu Lake Hospital (Dushu Lake Hospital Affiliated to Soochow University), Suzhou, 215124, China.
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Cyst stem cell lineage eIF5 non-autonomously prevents testicular germ cell tumor formation via eIF1A/eIF2γ-mediated pre-initiation complex. Stem Cell Res Ther 2022; 13:351. [PMID: 35883200 PMCID: PMC9327282 DOI: 10.1186/s13287-022-03025-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 07/02/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Stem cell niche maintains stem cell population identity and is essential for the homeostasis of self-renewal and differentiation in Drosophila testes. However, the mechanisms of CySC lineage signals-mediated soma-germline communications in response to external stimuli are unclear. METHODS Pre-initiation complex functions were evaluated by UAS-Gal4-mediated cell effects. RNA sequencing was conducted in NC and eIF5 siRNA-treated cells. Genetic interaction analysis was used to indicate the relationships between eIF5 and eIF1A/eIF2γ in Drosophila testes. RESULTS Here, we demonstrated that in CySCs, translation initiation factor eIF5 mediates cyst cell differentiation and the non-autonomously affected germ cell differentiation process. CySCs lacking eIF5 displayed unbalanced cell proliferation and apoptosis, forming testicular germ cell tumors (TGCTs) during spermatogenesis. eIF5 transcriptional regulation network analysis identified multiple metabolic processes and several key factors that might be involved in germ cell differentiation and TGCT formation. Importantly, knockdown of eIF1A and eIF2γ, key components of pre-initiation complex, mimicked the phenotype of knocking down eIF5 in the stem cell niche of Drosophila testes. Genetic interaction analysis indicated that eIF5 was sufficient to rescue the phenotype of tumorlike structures induced by down-regulating eIF1A or eIF2γ in CySCs. CONCLUSIONS These findings demonstrated that CySC lineage eIF5, together with eIF1A or eIF2γ, mediates soma-germline communications for the stem cell niche homeostasis in Drosophila testes, providing new insights for the prevention of TGCTs.
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11
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Yu J, Zheng Q, Li Z, Wu Y, Fu Y, Wu X, Lin D, Shen C, Zheng B, Sun F. CG6015 controls spermatogonia transit-amplifying divisions by epidermal growth factor receptor signaling in Drosophila testes. Cell Death Dis 2021; 12:491. [PMID: 33990549 PMCID: PMC8121936 DOI: 10.1038/s41419-021-03783-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 04/29/2021] [Accepted: 04/30/2021] [Indexed: 02/03/2023]
Abstract
Spermatogonia transit-amplifying (TA) divisions are crucial for the differentiation of germline stem cell daughters. However, the underlying mechanism is largely unknown. In the present study, we demonstrated that CG6015 was essential for spermatogonia TA-divisions and elongated spermatozoon development in Drosophila melanogaster. Spermatogonia deficient in CG6015 inhibited germline differentiation leading to the accumulation of undifferentiated cell populations. Transcriptome profiling using RNA sequencing indicated that CG6015 was involved in spermatogenesis, spermatid differentiation, and metabolic processes. Gene Set Enrichment Analysis (GSEA) revealed the relationship between CG6015 and the epidermal growth factor receptor (EGFR) signaling pathway. Unexpectedly, we discovered that phosphorylated extracellular regulated kinase (dpERK) signals were activated in germline stem cell (GSC)-like cells after reduction of CG6015 in spermatogonia. Moreover, Downstream of raf1 (Dsor1), a key downstream target of EGFR, mimicked the phenotype of CG6015, and germline dpERK signals were activated in spermatogonia of Dsor1 RNAi testes. Together, these findings revealed a potential regulatory mechanism of CG6015 via EGFR signaling during spermatogonia TA-divisions in Drosophila testes.
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Affiliation(s)
- Jun Yu
- grid.260483.b0000 0000 9530 8833Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, China
| | - Qianwen Zheng
- grid.440785.a0000 0001 0743 511XDepartment of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, China
| | - Zhiran Li
- grid.260483.b0000 0000 9530 8833Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, China
| | - Yunhao Wu
- grid.260483.b0000 0000 9530 8833Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, China
| | - Yangbo Fu
- grid.260483.b0000 0000 9530 8833Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, China
| | - Xiaolong Wu
- grid.260483.b0000 0000 9530 8833Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, China
| | - Dengfeng Lin
- grid.260483.b0000 0000 9530 8833Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, China
| | - Cong Shen
- grid.89957.3a0000 0000 9255 8984State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, China
| | - Bo Zheng
- grid.89957.3a0000 0000 9255 8984State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, China
| | - Fei Sun
- grid.260483.b0000 0000 9530 8833Institute of Reproductive Medicine, School of Medicine, Nantong University, Nantong, China
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12
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Zheng Q, Chen X, Qiao C, Wang M, Chen W, Luan X, Yan Y, Shen C, Fang J, Hu X, Zheng B, Wu Y, Yu J. Somatic CG6015 mediates cyst stem cell maintenance and germline stem cell differentiation via EGFR signaling in Drosophila testes. Cell Death Discov 2021; 7:68. [PMID: 33824283 PMCID: PMC8024382 DOI: 10.1038/s41420-021-00452-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 02/21/2021] [Accepted: 03/18/2021] [Indexed: 11/09/2022] Open
Abstract
Stem cell niche is regulated by intrinsic and extrinsic factors. In the Drosophila testis, cyst stem cells (CySCs) support the differentiation of germline stem cells (GSCs). However, the underlying mechanisms remain unclear. In this study, we found that somatic CG6015 is required for CySC maintenance and GSC differentiation in a Drosophila model. Knockdown of CG6015 in CySCs caused aberrant activation of dpERK in undifferentiated germ cells in the Drosophila testis, and disruption of key downstream targets of EGFR signaling (Dsor1 and rl) in CySCs results in a phenotype resembling that of CG6015 knockdown. CG6015, Dsor1, and rl are essential for the survival of Drosophila cell line Schneider 2 (S2) cells. Our data showed that somatic CG6015 regulates CySC maintenance and GSC differentiation via EGFR signaling, and inhibits aberrant activation of germline dpERK signals. These findings indicate regulatory mechanisms of stem cell niche homeostasis in the Drosophila testis.
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Affiliation(s)
- Qianwen Zheng
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, 212001, Zhenjiang, Jiangsu, P.R. China
| | - Xia Chen
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, 212001, Zhenjiang, Jiangsu, P.R. China
| | - Chen Qiao
- Department of Clinical Pharmacy, the Affiliated Hospital of Jiangsu University, Jiangsu University, 212001, Zhenjiang, Jiangsu, P.R. China
| | - Min Wang
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, 212001, Zhenjiang, Jiangsu, P.R. China
| | - Wanyin Chen
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, 212001, Zhenjiang, Jiangsu, P.R. China
| | - Xiaojin Luan
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, 212001, Zhenjiang, Jiangsu, P.R. China
| | - Yidan Yan
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, 212001, Zhenjiang, Jiangsu, P.R. China
| | - Cong Shen
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, 215002, Suzhou, Jiangsu, P.R. China
| | - Jie Fang
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, 212001, Zhenjiang, Jiangsu, P.R. China
| | - Xing Hu
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, 212001, Zhenjiang, Jiangsu, P.R. China
| | - Bo Zheng
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, 215002, Suzhou, Jiangsu, P.R. China.
| | - Yibo Wu
- Human Reproductive and Genetic Center, Affiliated Hospital of Jiangnan University, 214062, Wuxi, Jiangsu, P.R. China.
| | - Jun Yu
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, 212001, Zhenjiang, Jiangsu, P.R. China.
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Wnt6 regulates the homeostasis of the stem cell niche via Rac1-and Cdc42-mediated noncanonical Wnt signalling pathways in Drosophila testis. Exp Cell Res 2021; 402:112511. [PMID: 33582096 DOI: 10.1016/j.yexcr.2021.112511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 01/18/2021] [Accepted: 01/26/2021] [Indexed: 11/23/2022]
Abstract
The homeostasis of the stem cell niche is regulated by both intrinsic and extrinsic factors, and the complex and ordered molecular and cellular regulatory mechanisms need to be further explored. In Drosophila testis, germline stem cells (GSCs) rely on hub cells for self-renewal and physical attachment. GSCs are also in contact with somatic cyst stem cells (CySCs). Utilizing genetic manipulation in Drosophila, we investigated the role of Wnt6 in vivo and in vitro. In Drosophila testis, we found that Wnt6 is required for GSC differentiation and CySC self-renewal. In Schneider 2 (S2) cells, we found that Wnt6 regulates cell proliferation and apoptosis. Mechanistically, we demonstrated that Wnt6 can downregulate the expression levels of Arm, Rac1 and Cdc42 in S2 cells. Notably, Rac1 and Cdc42, which act downstream of the noncanonical Wnt signalling pathway, imitated the phenotypes of Wnt6 in Drosophila testis. Thus, the newly discovered Wnt6-Rac1/Cdc42 signal axis is required for the homeostasis of the stem cell niche in the Drosophila testis.
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González de Cózar JM, Carretero-Junquera M, Ciesielski GL, Miettinen SM, Varjosalo M, Kaguni LS, Dufour E, Jacobs HT. A second hybrid-binding domain modulates the activity of Drosophila ribonuclease H1. J Biochem 2020; 168:515-533. [PMID: 32589740 PMCID: PMC7657459 DOI: 10.1093/jb/mvaa067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 06/15/2020] [Indexed: 11/14/2022] Open
Abstract
In eukaryotes, ribonuclease H1 (RNase H1) is involved in the processing and removal of RNA/DNA hybrids in both nuclear and mitochondrial DNA. The enzyme comprises a C-terminal catalytic domain and an N-terminal hybrid-binding domain (HBD), separated by a linker of variable length, 115 amino acids in Drosophila melanogaster (Dm). Molecular modelling predicted this extended linker to fold into a structure similar to the conserved HBD. Based on a deletion series, both the catalytic domain and the conserved HBD were required for high-affinity binding to heteroduplex substrates, while loss of the novel HBD led to an ∼90% drop in Kcat with a decreased KM, and a large increase in the stability of the RNA/DNA hybrid-enzyme complex, supporting a bipartite-binding model in which the second HBD facilitates processivity. Shotgun proteomics following in vivo cross-linking identified single-stranded DNA-binding proteins from both nuclear and mitochondrial compartments, respectively RpA-70 and mtSSB, as prominent interaction partners of Dm RNase H1. However, we were not able to document direct and stable interactions with mtSSB when the proteins were co-overexpressed in S2 cells, and functional interactions between them in vitro were minor.
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Affiliation(s)
| | | | - Grzegorz L Ciesielski
- Faculty of Medicine and Health Technology, FI-33014 Tampere University, Finland
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA
- Department of Chemistry, Auburn University at Montgomery, Montgomery, AL 36117, USA
| | - Sini M Miettinen
- Institute of Biotechnology, FI-00014 University of Helsinki, Finland
| | - Markku Varjosalo
- Institute of Biotechnology, FI-00014 University of Helsinki, Finland
| | - Laurie S Kaguni
- Faculty of Medicine and Health Technology, FI-33014 Tampere University, Finland
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA
| | - Eric Dufour
- Faculty of Medicine and Health Technology, FI-33014 Tampere University, Finland
| | - Howard T Jacobs
- Faculty of Medicine and Health Technology, FI-33014 Tampere University, Finland
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15
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Wang M, Chen X, Wu Y, Zheng Q, Chen W, Yan Y, Luan X, Shen C, Fang J, Zheng B, Yu J. RpS13 controls the homeostasis of germline stem cell niche through Rho1-mediated signals in the Drosophila testis. Cell Prolif 2020; 53:e12899. [PMID: 32896929 PMCID: PMC7574871 DOI: 10.1111/cpr.12899] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 08/15/2020] [Accepted: 08/18/2020] [Indexed: 12/20/2022] Open
Abstract
Objectives Stem cell niche regulated the renewal and differentiation of germline stem cells (GSCs) in Drosophila. Previously, we and others identified a series of genes encoding ribosomal proteins that may contribute to the self‐renewal and differentiation of GSCs. However, the mechanisms that maintain and differentiate GSCs in their niches were not well understood. Materials and Methods Flies were used to generate tissue‐specific gene knockdown. Small interfering RNAs were used to knockdown genes in S2 cells. qRT‐PCR was used to examine the relative mRNA expression level. TUNEL staining or flow cytometry assays were used to detect cell survival. Immunofluorescence was used to determine protein localization and expression pattern. Results Herein, using a genetic manipulation approach, we investigated the role of ribosomal protein S13 (RpS13) in testes and S2 cells. We reported that RpS13 was required for the self‐renewal and differentiation of GSCs. We also demonstrated that RpS13 regulated cell proliferation and apoptosis. Mechanistically, we showed that RpS13 regulated the expression of ribosome subunits and could moderate the expression of the Rho1, DE‐cad and Arm proteins. Notably, Rho1 imitated the phenotype of RpS13 in both Drosophila testes and S2 cells, and recruited cell adhesions, which was mediated by the DE‐cad and Arm proteins. Conclusion These findings uncover a novel mechanism of RpS13 that mediates Rho1 signals in the stem cell niche of the Drosophila testis.
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Affiliation(s)
- Min Wang
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, China
| | - Xia Chen
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, China
| | - Yibo Wu
- Human Reproductive and Genetic Center, Affiliated Hospital of Jiangnan University, Wuxi, Jiangsu, China
| | - Qianwen Zheng
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, China
| | - Wanyin Chen
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, China
| | - Yidan Yan
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, China
| | - Xiaojin Luan
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, China
| | - Cong Shen
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, the Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China
| | - Jie Fang
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, China
| | - Bo Zheng
- State Key Laboratory of Reproductive Medicine, Center for Reproduction and Genetics, Suzhou Municipal Hospital, the Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China
| | - Jun Yu
- Department of Gynecology, the Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, China
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Precursor RNA processing 3 is required for male fertility, and germline stem cell self-renewal and differentiation via regulating spliceosome function in Drosophila testes. Sci Rep 2019; 9:9988. [PMID: 31292463 PMCID: PMC6620278 DOI: 10.1038/s41598-019-46419-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 06/28/2019] [Indexed: 11/17/2022] Open
Abstract
The nuclear pre-mRNA spliceosome is a large complex containing five small nuclear ribonucleoprotein particles (snRNPs) and many splicing factors. Messenger RNAs (mRNAs) are generated from pre-mRNAs by the process of RNA splicing, which is conserved in eukaryotes. Precursor RNA processing 3 (Prp3) is a U4/U6-associated snRNP whose function remains largely unknown. In the present study, using genetic manipulation of a Drosophila melanogaster testis model, we demonstrated that Prp3 is essential for male fertility in Drosophila. Prp3 deficiency in germline stem cells (GSCs) and early cyst cells resulted in abnormal structure of testes and maintenance defects of GSCs and cyst stem cells. Knockdown of Prp3 in spermatogonia and early cyst cells mediated tumor formation caused by differentiation defects. Using an in vitro assay, knockdown of Prp3 decreased proliferation and increased cell death, and controlled the spliceosome function via regulating spliceosome subunits expression in Drosophila S2 cells. We also identified two other splicing factors in the Prp complex (Prp19 and Prp8), which mimicked the phenotype of Prp3 in the Drosophila stem cell niche. Our results revealed a significant role of precursor RNA processing factors in male testes, indicating that Prp3, a key spliceosome component in the Prp complex, is essential for male fertility, and germline stem cell self-renewal and differentiation, via regulating the spliceosome function in Drosophila testes.
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