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Martins AD, Ribeiro JC, Ferreira R, Alves MG, Oliveira PF. Understanding the age-related alterations in the testis-specific proteome. Expert Rev Proteomics 2023; 20:331-343. [PMID: 37878493 DOI: 10.1080/14789450.2023.2274857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 10/12/2023] [Indexed: 10/27/2023]
Abstract
INTRODUCTION Fertility rates in developing countries have declined over the past decades, and the trend of delayed fatherhood is rising as societies develop. The reasons behind the decline in male fertility with advancing age remain mysterious, making it a compelling and crucial area for further research. However, the limited number of studies dedicated to unraveling this enigma poses a challenge. Thus, our objective is to illuminate some of the upregulated and downregulated mechanisms in the male testis during the aging process. AREAS COVERED Herein, we present a critical overview of the studies addressing the alterations of testicular proteome through the aging process, starting from sexually matured young males to end-of-life-expectancy aged males. The comparative studies of the proteomic testicular profile of men with and without spermatogenic impairment are also discussed and key proteins and pathways involved are highlighted. EXPERT OPINION The difficulty of making age-comparative studies, especially of advanced-age study subjects, makes this topic of study quite challenging. Another topic worth mentioning is the heterogeneous nature and vast cellular composition of testicular tissue, which makes proteome data interpretation tricky. The cell type sorting and comorbidities testing in the testicular tissue of the studied subjects would help mitigate these problems.
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Affiliation(s)
- Ana D Martins
- LAQV-REQUIMTE and Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - João C Ribeiro
- LAQV-REQUIMTE and Department of Chemistry, University of Aveiro, Aveiro, Portugal
- Unit for Multidisciplinary Research in Biomedicine (UMIB), Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
- Laboratory for Integrative and Translational Research in Population Health (ITR), University of Porto, Porto, Portugal
| | - Rita Ferreira
- LAQV-REQUIMTE and Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Marco G Alves
- iBiMED-Institute of Biomedicine, Department of Medical Sciences, University of Aveiro, Aveiro, Portugal
| | - Pedro F Oliveira
- LAQV-REQUIMTE and Department of Chemistry, University of Aveiro, Aveiro, Portugal
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Wang P, Zhang X, Huo H, Li W, Liu Z, Wang L, Li L, Sun YH, Huo J. Transcriptomic analysis of testis and epididymis tissues from Banna mini-pig inbred line boars with single-molecule long-read sequencing†. Biol Reprod 2023; 108:465-478. [PMID: 36477198 DOI: 10.1093/biolre/ioac216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 05/04/2022] [Accepted: 11/30/2022] [Indexed: 12/14/2022] Open
Abstract
In mammals, testis and epididymis are critical components of the male reproductive system for androgen production, spermatogenesis, sperm transportation, as well as sperm maturation. Here, we report single-molecule real-time sequencing data from the testis and epididymis of the Banna mini-pig inbred line (BMI), a promising laboratory animal for medical research. We obtained high-quality full-length transcriptomes and identified 9879 isoforms and 8761 isoforms in the BMI testis and epididymis, respectively. Most of the isoforms we identified have novel exon structures that will greatly improve the annotation of testis- and epididymis-expressed genes in pigs. We also found that 3055 genes (over 50%) were shared between BMI testis and epididymis, indicating widespread expression profiles of genes related to reproduction. We characterized extensive alternative splicing events in BMI testis and epididymis and showed that 96 testis-expressed genes and 79 epididymis-expressed genes have more than six isoforms, revealing the complexity of alternative splicing. We accurately defined the transcribed isoforms in BMI testis and epididymis by combining Pacific Biotechnology Isoform-sequencing (PacBio Iso-Seq) and Illumina RNA Sequencing (RNA-seq) techniques. The refined annotation of some key genes governing male reproduction will facilitate further understanding of the molecular mechanisms underlying BMI male sterility. In addition, the high-confident identification of 548 and 669 long noncoding RNAs (lncRNAs) in these two tissues has established a candidate gene set for future functional investigations. Overall, our study provides new insights into the role of the testis and epididymis during BMI reproduction, paving the path for further studies on BMI male infertility.
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Affiliation(s)
- Pei Wang
- College of Animal Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Xia Zhang
- College of Life Science, Lyuliang University, Lvliang, China
| | - Hailong Huo
- Yunnan Vocational and Technical college of Agriculture, Kunming, China
| | - Weizhen Li
- College of Veterinary Medicine, Yunnan Agricultural University, Kunming, China
| | - Zhipeng Liu
- College of Animal Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Lina Wang
- College of Animal Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Luogang Li
- College of Animal Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Yu H Sun
- Department of Biology, University of Rochester, Rochester, NY, USA
| | - Jinlong Huo
- College of Animal Science and Technology, Yunnan Agricultural University, Kunming, China
- Department of Biology, University of Rochester, Rochester, NY, USA
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A Comparative Cross-Platform Analysis to Identify Potential Biomarker Genes for Evaluation of Teratozoospermia and Azoospermia. Genes (Basel) 2022; 13:genes13101721. [PMID: 36292606 PMCID: PMC9602071 DOI: 10.3390/genes13101721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/12/2022] [Accepted: 09/19/2022] [Indexed: 11/24/2022] Open
Abstract
Male infertility is a global public health concern. Teratozoospermia is a qualitative anomaly of spermatozoa morphology, contributing significantly to male infertility, whereas azoospermia is the complete absence of spermatozoa in the ejaculate. Thus, there is a serious need for unveiling the common origin and/or connection between both of these diseases, if any. This study aims to identify common potential biomarker genes of these two diseases via an in silico approach using a meta-analysis of microarray data. In this study, a differential expression analysis of genes was performed on four publicly available RNA microarray datasets, two each from teratozoospermia (GSE6872 and GSE6967) and azoospermia (GSE145467 and GSE25518). From the analysis, 118 DEGs were found to be common to teratozoospermia and azoospermia, and, interestingly, sperm autoantigenic protein 17 (SPA17) was found to possess the highest fold change value among all the DEGs (9.471), while coiled-coil domain-containing 90B (CCDC90B) and coiled-coil domain-containing 91 (CCDC91) genes were found to be common among three of analyses, i.e., Network Analyst, ExAtlas, and GEO2R. This observation indicates that SPA17, CCDC90B, and CCDC91 genes might have significant roles to play as potential biomarkers for teratozoospermia and azoospermia. Thus, our study opens a new window of research in this area and can provide an important theoretical basis for the diagnosis and treatment of both these diseases.
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Han T, Huang J, Gu J, Xie Q, Zhong Y, Huang T. Hepatitis B virus surface protein induces sperm dysfunction through the activation of a Bcl2/Bax signaling cascade triggering AIF/Endo G-mediated apoptosis. Andrology 2021; 9:944-955. [PMID: 33382193 PMCID: PMC8247882 DOI: 10.1111/andr.12965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 12/16/2020] [Accepted: 12/29/2020] [Indexed: 02/05/2023]
Abstract
BACKGROUND Hepatitis B virus (HBV) was found to exist in semen and male germ cells of patients with chronic HBV infection. Our previous studies demonstrated that HBV surface protein (HBs) could induce sperm dysfunction by activating a calcium signaling cascade and triggering caspase-dependent apoptosis. However, the relationship between sperm dysfunction caused by HBs and caspase-independent apoptosis has not been investigated. OBJECTIVES To evaluate the effects of HBs exposure on sperm dysfunction by activating caspase-independent apoptosis. MATERIALS AND METHODS Spermatozoa were exposed to HBs at concentrations of 0, 25, 50, and 100 μg/mL for 3 h. Flow cytometry, qRT-PCR, immunofluorescence assay, ELISA, and zona-free hamster oocyte penetration assays were performed. RESULTS With increasing concentrations of HBs, various parameters of the spermatozoa changed. The number of Bcl2-positive cells declined and that of both Bax-positive cells and Apaf-1-positive cells increased. The transcription level of Bcl2 increased and that of both Bax and Apaf-1 declined. The average levels of AIF and Endo G declined in mitochondria and increased in the cytoplasm and nucleus. The sperm DNA fragmentation index increased. The mean percentages of live spermatozoa declined and that of both injured and dead spermatozoa increased; and the sperm penetration rate declined. For the aforementioned parameters, the differences between the test and the control groups were statistically significant. CONCLUSION HBs exposure can activate the Bax/Bcl2 signaling cascade that triggers AIF/Endo G-mediated apoptosis, resulting in sperm DNA fragmentation, sperm injury, and death, and a decrease in the sperm fertilizing capacity. This new knowledge will help to evaluate the negative impact of HBV on male fertility in HBV-infected patients.
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Affiliation(s)
- Ting‐Ting Han
- Research Center for Reproductive MedicineShantou University Medical CollegeShantouChina
| | - Ji‐Hua Huang
- Jinxin Research Institute for Reproductive Medicine and GeneticsChengdu Jinjiang Hospital for Maternal and Child Health CareChengduChina
| | - Jiang Gu
- Jinxin Research Institute for Reproductive Medicine and GeneticsChengdu Jinjiang Hospital for Maternal and Child Health CareChengduChina
- Guangdong Provincial Key Laboratory of Infectious Diseases and Molecular ImmunopathologyCollaborative and Creative Center of Shantou UniversityShantouChina
| | - Qing‐Dong Xie
- Research Center for Reproductive MedicineShantou University Medical CollegeShantouChina
| | - Ying Zhong
- Jinxin Research Institute for Reproductive Medicine and GeneticsChengdu Jinjiang Hospital for Maternal and Child Health CareChengduChina
| | - Tian‐Hua Huang
- Research Center for Reproductive MedicineShantou University Medical CollegeShantouChina
- Jinxin Research Institute for Reproductive Medicine and GeneticsChengdu Jinjiang Hospital for Maternal and Child Health CareChengduChina
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Lee SH, Kim YJ, Kang BH, Yun YS, Park CK. The relationship between acrosome reaction and polyunsaturated fatty acid composition in boar sperm. Reprod Domest Anim 2020; 55:624-631. [PMID: 32108385 DOI: 10.1111/rda.13661] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 02/18/2020] [Indexed: 01/29/2023]
Abstract
This study investigated the relationship between acrosome reactions and fatty acid composition with respect to fertility in boar sperm. The acrosome reaction was induced more than 85% by 60 mM methyl-beta-cyclodextrin (MBCD), and plasma membrane integrity was significantly reduced dependent on the MBCD level in boar sperm (p < .05). The acrosome-reacted sperm exhibited significantly higher saturated fatty acids (SFAs) and lower polyunsaturated fatty acids (PUFAs) composition compared to the non-acrosome reaction group (p < .0001). In addition, the PUFAs, C22:5n-6 (docosapentaenoic acid [DPA]; p < .01) and C22:6n-3 (docosahexaenoic acid [DHA]; p < .0001) were significantly decreased, and cleavage and blastocyst formation of oocytes were significantly (p < .0001) decreased in acrosome-reacted sperm relative to non-acrosome-reacted sperm. Moreover, acrosome reaction was positively correlated with SFAs, whereas negatively correlated with PUFAs, of the PUFAs, the DPA (p = .0005) and DHA (p = <.0001) were negatively correlated with the acrosome reaction. Therefore, these results suggest that the PUFAs composition of sperm is closely involved in acrosome reaction in pigs.
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Affiliation(s)
- Sang-Hee Lee
- Discipline of Information and Communication Technology, University of Tasmania, Hobart, Tasmania, Australia
| | - Yu-Jin Kim
- College of Animal Life Sciences, Kangwon National University, Chuncheon, Korea
| | - Byeong Ho Kang
- Discipline of Information and Communication Technology, University of Tasmania, Hobart, Tasmania, Australia
| | - Yong Sik Yun
- Department of Mathematics and Research Institute for Basic Sciences, Jeju National University, Jeju, Korea
| | - Choon-Keun Park
- College of Animal Life Sciences, Kangwon National University, Chuncheon, Korea
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Singh RP, Escobar E, Wildt D, Patel S, Costa GMJ, Pukazhenthi B. Effect of sphingosine-1-phosphate on cryopreserved sheep testicular explants cultured in vitro. Theriogenology 2019; 128:184-192. [PMID: 30772662 DOI: 10.1016/j.theriogenology.2019.01.038] [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] [Received: 06/21/2018] [Revised: 12/29/2018] [Accepted: 01/31/2019] [Indexed: 10/27/2022]
Abstract
Complete spermatogenesis has been achieved in vitro in mouse testicular explants with resulting sperm used to produce pups after Intra Cytoplasm Sperm Injection and Embryo Transfer. In the present study, we evaluated the influence of sphingosine-1-phosphate (S1P) on spermatogenesis of frozen-thawed lamb testis explants in vitro. Thawed testicular pieces were cultured for 12 d on agarose blocks in serum-free growth medium containing 0, 2, 5 or 10 μM S1P. At the end of D6 and D12, some pieces were fixed and processed for histology. Other pieces were processed for RNA isolation and quantitation of proliferation (PCNA, Ki67) and differentiation (PLZF) markers and genes involved in S1P signaling (S1PR1, SGPL1, SGPP1, AKT1 and NFKBIA) by qPCR. Histology revealed an increase (P < 0.05) in seminiferous cord (SC) diameter under all culture conditions, except 5 and 10 μM S1P by D6. In the presence of 5 μM S1P, percentage of gonocytes decreased (P < 0.05) by D6 (control, 24.9% vs. S1P, 10.3%) with a concomitant increase (P < 0.05) in spermatogonia formation (control, 74.4% vs. S1P, 88.1%). S1P induced PCNA or Ki67 expression by D6, whereas PLZF was up-regulated (P < 0.05) by D6 in 2 μM S1P and D12 in 5 & 10 μM S1P. Expression of SGPL1 and SGPP1 increased 4-12-fold in tissues cultured in 10 μM S1P by D12 compared to D12 control. AKT1 and NFKBIA mRNA expression was low (P < 0.05) in 5 and or 10 μM S1P treatments on D6. These results demonstrate that S1P promotes germ cell proliferation during first week of culture and may exert an anti-apoptotic influence on the seminiferous cord in sheep testicular explants in vitro.
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Affiliation(s)
- Ram Pratap Singh
- Center for Species Survival, Smithsonian Conservation Biology Institute, National Zoological Park, Front Royal, VA, USA; Sálim Ali Centre for Ornithology and Natural History, Anaikatty, Coimbatore, India.
| | - Enrique Escobar
- Department of Agriculture, Food and Resource Sciences, School of Agriculture and Natural Sciences, University of Maryland-Eastern Shore, Princess Anne, MD, USA
| | - David Wildt
- Center for Species Survival, Smithsonian Conservation Biology Institute, National Zoological Park, Front Royal, VA, USA
| | - Seema Patel
- Center for Species Survival, Smithsonian Conservation Biology Institute, National Zoological Park, Front Royal, VA, USA
| | - Guilherme M J Costa
- Laboratory of Cellular Biology, Department of Morphology, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Budhan Pukazhenthi
- Center for Species Survival, Smithsonian Conservation Biology Institute, National Zoological Park, Front Royal, VA, USA
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Salemi M, Cannarella R, Condorelli RA, Cimino L, Ridolfo F, Giurato G, Romano C, La Vignera S, Calogero AE. Evidence for long noncoding RNA GAS5 up-regulationin patients with Klinefelter syndrome. BMC MEDICAL GENETICS 2019; 20:4. [PMID: 30612561 PMCID: PMC6322229 DOI: 10.1186/s12881-018-0744-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 12/26/2018] [Indexed: 01/06/2023]
Abstract
Background Klinefelter syndrome (KS) is characterized by the presence of at least one supernumerary X chromosome. KS typical symptoms include tall stature, gynecomastia, hypogonadism and azoospermia. KS patients show a higher risk of developing metabolic and cardiovascular diseases, inflammatory and autoimmune disorders, osteoporosis and cancer. Long non-coding RNA (lncRNA) growth arrest-specific 5 (GAS5) has been shown to be involved in several biologic processes, including inflammatory and autoimmune diseases, vascular endothelial cells apoptosis and atherosclerosis, as well as cellular growth and proliferation, cellular development and cell-to-cell signaling and interaction. The lncRNA GAS5 expression profile in KS patients has never been evaluated so far. Methods To accomplish this, GAS5 mRNA levels were evaluated by Next Generation Sequencing (NGS) technology and qRT-PCR assay in 10 patients with KS and 10 age-matched controls. Results NGS results showed a significantly lncRNAGAS5up-regulation by 5.171-fold in patients with KS. Theresults of qRT-PCR confirmed the NGS data. Conclusions These findings showed the occurrence of lncRNA GAS5 over-expression in KS patients. Whether this lncRNA is involved in the pathogenesis of inflammation and autoimmune diseases, atherogenesis or germ cell depletion in KS patients is not known. Further studies are needed.
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Affiliation(s)
| | - Rossella Cannarella
- Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Rosita A Condorelli
- Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Laura Cimino
- Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Federico Ridolfo
- UOS of Clinical Pathology, ASUR Marche - AV2, Hospital of Senigallia, Senigallia, Italy
| | - Giorgio Giurato
- Genomix4Life Srl, Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Baronissi (SA), Italy
| | | | - Sandro La Vignera
- Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Aldo E Calogero
- Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
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Exposure to Pb and Cd alters MCT4/CD147 expression and MCT4/CD147-dependent lactate transport in mice Sertoli cells cultured in vitro. Toxicol In Vitro 2019; 56:30-40. [PMID: 30615929 DOI: 10.1016/j.tiv.2019.01.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 10/28/2018] [Accepted: 01/03/2019] [Indexed: 12/22/2022]
Abstract
Sertoli cells (SCs) provide lactate as an energy substrate to develop germ cells during spermatogenesis. Lead (Pb) and cadmium (Cd) can induce SC toxicity. However, the mechanisms remain unclear. This study aimed to investigate the molecular mechanisms by which Pb and Cd alter lactate transport and production by SCs. Mouse SC line (15P-1 cells) were cultured in the absence and presence of lead acetate (PbAc, 1, 10, 20 and 30 μM) or cadmium chloride (CdCl2, 0.5, 5, 10 and 15 μM) for 24 h. The results showed that PbAc exposure significantly decreased lactate dehydrogenase (LDH) activity and mRNA level, intracellular and extracellular lactate, and MCT4 and CD147 protein levels but increased MCT4 and CD147 mRNA levels. However, PbAc did not alter the glucose uptake, glucose transporters 1 (GLUT1) and 3 (GLUT3) mRNA expression of SCs. Thus, PbAc mainly decreased lactate production by inhibiting LDH activity. In CdCl2-treated SCs, intracellular lactate content increased but extracellular lactate content decreased significantly, P < .05. The glucose uptake, LDH activity, and mRNA expression of GLUT1, GLUT3 and LDH, all significantly increased. But the mRNA and protein levels of MCT4 and CD147 significantly decreased. Moreover, the fluorescence intensity of co-localizations of the MCT4-CD147 complex dose-dependently decreased in the cell membrane. Thus, CdCl2 may reduce lactate export by suppressing MCT4 and CD147 expression. These results suggest that PbAc and CdCl2 disrupt lactate production and transport in mouse SCs by disturbing glycolysis or inhibiting MCT4-CD147 transporter expression and co-localizations.
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Sharma M, Arya D, Bhagour K, Gupta RS. Modulatory effects of methanolic fruit fraction of Pedalium murex on sulphasalazine-induced male reproductive disruption. Andrologia 2018; 51:e13190. [PMID: 30430603 DOI: 10.1111/and.13190] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 09/28/2018] [Accepted: 10/07/2018] [Indexed: 11/29/2022] Open
Abstract
Pedalium murex is widely practiced in Ayurveda for the treatment of sexual disorders, but their detailed scientific evaluations are still unexplored. Therefore, the present study was conducted to assess the effect of methanolic fruit fraction of P. murex (MfPm) against sulphasalazine (SSZ) induced male reproductive disruption. MfPm and Clomiphene citrate were orally administered to SSZ (100 mg/kg b.wt) induced infertile rats at the dose of 50 and 10 mg/kg b.wt, respectively, for 60 days. MfPm treatment promoted a significant (p < 0.01) improvement in fertility (~70%), sperm motility (21%), and sperm density (11.20% and 12.30%). MfPm administration restored the serum luteinizing hormone, follicle-stimulating hormone, and testosterone levels back to their normal range in a significant (p < 0.01) manner and also significantly (p < 0.01) altered the level of biochemical parameters in treated rats. Furthermore, histological examination showed an improvement in spermatogenesis, as well as regeneration in the testicular architecture observed with increased germinal and interstitial cell count in response to MfPm treated rats. In conclusion, the results suggest that MfPm showed a significant modulatory effect against SSZ induced male reproductive disruption via possible mode of action such as spermatogenic and androgenic nature, therefore, justifying the traditional use of this plant in the treatment of reproductive disruption.
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Affiliation(s)
- Mahima Sharma
- Reproductive Physiology and Endocrinology Section, Centre of Advanced Studies, Department of Zoology, University of Rajasthan, Jaipur, Rajasthan, India
| | - Dharmendra Arya
- Reproductive Physiology and Endocrinology Section, Centre of Advanced Studies, Department of Zoology, University of Rajasthan, Jaipur, Rajasthan, India
| | - Kiran Bhagour
- Reproductive Physiology and Endocrinology Section, Centre of Advanced Studies, Department of Zoology, University of Rajasthan, Jaipur, Rajasthan, India
| | - Radhey S Gupta
- Reproductive Physiology and Endocrinology Section, Centre of Advanced Studies, Department of Zoology, University of Rajasthan, Jaipur, Rajasthan, India
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Meng L, Xu W, Zhu Y, Zhang N, Shao C, Liu Y, Chen S. Molecular characterization and expression analysis of strbp in Chinese tongue sole (Cynoglossus semilaevis). Theriogenology 2018; 118:225-232. [DOI: 10.1016/j.theriogenology.2018.06.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 05/31/2018] [Accepted: 06/01/2018] [Indexed: 12/11/2022]
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Hamedi S, Shomali T, Haghighat A. Rosa damascena Mill. Essential Oil Has Protective Effect Against Testicular Damage in Diabetic Rats. J Diet Suppl 2018; 15:311-317. [PMID: 28792252 DOI: 10.1080/19390211.2017.1345030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
This study investigates the protective effect of Rosa damascena essential oil on diabetes-induced testicular damage in rats. Thirty-six male Wistar rats were randomly divided into 6 equal groups: Group I: negative control (no treatment); Group II: positive control (diabetic by alloxan injection); Groups III-VI that rendered diabetic and received, respectively, 50, 100, 200, and 400 µg/kg/day rose oil, orally for 28 days. Rose oil did not significantly change body weight and blood glucose level as compared to positive control. Serum testosterone level of rose oil-treated rats remained statistically the same with both negative and positive control groups (Groups I and II). Rats treated with rose oil especially at 2 higher dosages (Groups V and VI) had higher sperm count and increased diameters of seminiferous tubules as compared to Group II. Rose oil even at the lowest dosage significantly increased cell count of spermatogonia, primary spermatocytes, Sertoli cells, and Leydig cells, with better outcomes for higher dosages. It appears that short-term repeated dose administration of rose oil can dose-dependently improve structural deteriorations of testes and epididymal sperm count in diabetic rats.
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Affiliation(s)
- Somayeh Hamedi
- a Department of Basic Sciences, Faculty of Veterinary Medicine, Karaj Branch , Islamic Azad University , Alborz , Iran
| | - Tahoora Shomali
- b Division of Pharmacology and Toxicology, Department of Basic Sciences, School of Veterinary Medicine , Shiraz University , Shiraz , Iran
| | - Aliakbar Haghighat
- a Department of Basic Sciences, Faculty of Veterinary Medicine, Karaj Branch , Islamic Azad University , Alborz , Iran
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Zhong Y, Liu DL, Ahmed MMM, Li PH, Zhou XL, Xie QD, Xu XQ, Han TT, Hou ZW, Huang JH, Xu L, Huang TH. Transcription and regulation of hepatitis B virus genes in host sperm cells. Asian J Androl 2018; 20:284-289. [PMID: 29111540 PMCID: PMC5952484 DOI: 10.4103/aja.aja_46_17] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 08/24/2017] [Indexed: 02/05/2023] Open
Abstract
To investigate whether transcription of hepatitis B virus (HBV) gene occurs in human sperm, total RNA was extracted from sperm of patients with chronic HBV infection (test-1), from donor sperm transfected with a plasmid containing the full-length HBV genome (test-2), and from nontransfected donor sperm (control), used as the template for reverse transcription-polymerase chain reaction (RT-PCR). Positive bands for HBV DNA were observed in the test groups but not in the control. Next, to identify the role of host genes in regulating viral gene transcription in sperm, total RNA was extracted from 2-cell embryos derived from hamster oocytes fertilized in vitro by HBV-transfected (test) or nontransfected (control) human sperm and successively subjected to SMART-PCR, suppression subtractive hybridization, T/A cloning, bacterial amplification, microarray hybridization, sequencing and the Basic Local Alignment Search Tool (BLAST) search to isolate differentially expressed genes. Twenty-nine sequences showing significant identity to five human gene families were identified, with chorionic somatomammotropin hormone 2 (CSH2), eukaryotic translation initiation factor 4 gamma 2 (EIF4G2), pterin-4 alpha-carbinolamine dehydratase 2 (PCBD2), pregnancy-specific beta-1-glycoprotein 4 (PSG4) and titin (TTN) selected to represent target genes. Using real-time quantitative RT-PCR (qRT-PCR), when CSH2 and PCBD2 (or EIF4G2, PSG4 and TTN) were silenced by RNA interference, transcriptional levels of HBV s and x genes significantly decreased (or increased) (P < 0.05). Silencing of a control gene in sperm did not significantly change transcription of HBV s and x genes (P > 0.05). This study provides the first experimental evidence that transcription of HBV genes occurs in human sperm and is regulated by host genes.
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Affiliation(s)
- Ying Zhong
- Department of Genetics, Chengdu Jinxin Research Institute for Reproductive Medicine and Genetics, Chengdu 610066, China
| | - Dong-Ling Liu
- Research Center for Reproductive Medicine, Shantou University Medical College, Shantou 515041, China
| | - Mohamed Morsi M Ahmed
- Research Center for Reproductive Medicine, Shantou University Medical College, Shantou 515041, China
| | - Peng-Hao Li
- Department of Genetics, Chengdu Jinxin Research Institute for Reproductive Medicine and Genetics, Chengdu 610066, China
| | - Xiao-Ling Zhou
- Research Center for Reproductive Medicine, Shantou University Medical College, Shantou 515041, China
| | - Qing-Dong Xie
- Research Center for Reproductive Medicine, Shantou University Medical College, Shantou 515041, China
| | - Xiao-Qing Xu
- Research Center for Reproductive Medicine, Shantou University Medical College, Shantou 515041, China
| | - Ting-Ting Han
- Department of Genetics, Chengdu Jinxin Research Institute for Reproductive Medicine and Genetics, Chengdu 610066, China
| | - Zhi-Wei Hou
- Research Center for Reproductive Medicine, Shantou University Medical College, Shantou 515041, China
| | - Ji-Hua Huang
- Department of Genetics, Chengdu Jinxin Research Institute for Reproductive Medicine and Genetics, Chengdu 610066, China
| | - Lan Xu
- Department of Gynecology and Obstetrics, The First Affiliated Hospital, Shantou University Medical College, Shantou 515041, China
| | - Tian-Hua Huang
- Department of Genetics, Chengdu Jinxin Research Institute for Reproductive Medicine and Genetics, Chengdu 610066, China
- Correspondence: Dr. TH Huang ()
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Martins da Silva SJ, Brown SG, Sutton K, King LV, Ruso H, Gray DW, Wyatt PG, Kelly MC, Barratt CL, Hope AG. Drug discovery for male subfertility using high-throughput screening: a new approach to an unsolved problem. Hum Reprod 2017; 32:974-984. [PMID: 28333338 PMCID: PMC5850465 DOI: 10.1093/humrep/dex055] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 12/16/2016] [Accepted: 03/02/2017] [Indexed: 12/15/2022] Open
Abstract
STUDY QUESTION Can pharma drug discovery approaches be utilized to transform investigation into novel therapeutics for male infertility? SUMMARY ANSWER High-throughput screening (HTS) is a viable approach to much-needed drug discovery for male factor infertility. WHAT IS KNOWN ALREADY There is both huge demand and a genuine clinical need for new treatment options for infertile men. However, the time, effort and resources required for drug discovery are currently exorbitant, due to the unique challenges of the cellular, physical and functional properties of human spermatozoa and a lack of appropriate assay platform. STUDY DESIGN, SIZE, DURATION Spermatozoa were obtained from healthy volunteer research donors and subfertile patients undergoing IVF/ICSI at a hospital-assisted reproductive techniques clinic between January 2012 and November 2016. PARTICIPANTS/MATERIALS, SETTING, METHODS A HTS assay was developed and validated using intracellular calcium ([Ca2+]i) as a surrogate for motility in human spermatozoa. Calcium fluorescence was detected using a Flexstation microplate reader (384-well platform) and compared with responses evoked by progesterone, a compound known to modify a number of biologically relevant behaviours in human spermatozoa. Hit compounds identified following single point drug screen (10 μM) of an ion channel-focussed library assembled by the University of Dundee Drug Discovery Unit were rescreened to ensure potency using standard 10 point half-logarithm concentration curves, and tested for purity and integrity using liquid chromatography and mass spectrometry. Hit compounds were grouped by structure activity relationships and five representative compounds then further investigated for direct effects on spermatozoa, using computer-assisted sperm assessment, sperm penetration assay and whole-cell patch clamping. MAIN RESULTS AND THE ROLE OF CHANCE Of the 3242 ion channel library ligands screened, 384 compounds (11.8%) elicited a statistically significant increase in calcium fluorescence, with greater than 3× median absolute deviation above the baseline. Seventy-four compounds eliciting ≥50% increase in fluorescence in the primary screen were rescreened and evaluated further, resulting in 48 hit compounds that produced a concentration-dependent increase in [Ca2+]i. Sperm penetration studies confirmed in vitro exposure to two hit compounds (A and B) resulted in significant improvement in functional motility in spermatozoa from healthy volunteer donors (A: 1 cm penetration index 2.54, 2 cm penetration index 2.49; P < 0.005 and B: 1 cm penetration index 2.1, 2 cm penetration index 2.6; P < 0.005), but crucially, also in patient samples from those undergoing fertility treatment (A: 1 cm penetration index 2.4; P = 0.009, 2 cm penetration index 3.6; P = 0.02 and B: 1 cm penetration index 2.2; P = 0.0004, 2 cm penetration index 3.6; P = 0.002). This was primarily as a result of direct or indirect CatSper channel action, supported by evidence from electrophysiology studies of individual sperm. LIMITATIONS, REASONS FOR CAUTION Increase and fluxes in [Ca2+]i are fundamental to the regulation of sperm motility and function, including acrosome reaction. The use of calcium signalling as a surrogate for sperm motility is acknowledged as a potential limitation in this study. WIDER IMPLICATIONS OF THE FINDINGS We conclude that HTS can robustly, efficiently, identify novel compounds that increase [Ca2+]i in human spermatozoa and functionally modify motility, and propose its use as a cornerstone to build and transform much-needed drug discovery for male infertility. STUDY FUNDING/COMPETING INTEREST(S) The majority of the data were obtained using funding from TENOVUS Scotland and Chief Scientist Office NRS Fellowship. Additional funding was provided by NHS Tayside, MRC project grants (MR/K013343/1, MR/012492/1) and University of Abertay. The authors declare that there is no conflict of interest. TRAIL REGISTRATION NUMBER N/A.
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Affiliation(s)
- Sarah J. Martins da Silva
- Reproductive and Developmental Biology, University of Dundee, Ninewells Hospital, Dundee DD1 9SY, UK
- Assisted Conception Unit, Ninewells Hospital, Dundee DD1 9SY, UK
| | - Sean G. Brown
- School of Science Engineering and Technology, University of Abertay, Dundee DD1 1HG, UK
| | - Keith Sutton
- Reproductive and Developmental Biology, University of Dundee, Ninewells Hospital, Dundee DD1 9SY, UK
| | - Louise V. King
- Reproductive and Developmental Biology, University of Dundee, Ninewells Hospital, Dundee DD1 9SY, UK
| | - Halil Ruso
- Reproductive and Developmental Biology, University of Dundee, Ninewells Hospital, Dundee DD1 9SY, UK
| | - David W. Gray
- Drug Discovery Unit, School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK
| | - Paul G. Wyatt
- Drug Discovery Unit, School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK
| | - Mark C. Kelly
- Reproductive and Developmental Biology, University of Dundee, Ninewells Hospital, Dundee DD1 9SY, UK
| | - Christopher L.R. Barratt
- Reproductive and Developmental Biology, University of Dundee, Ninewells Hospital, Dundee DD1 9SY, UK
- Assisted Conception Unit, Ninewells Hospital, Dundee DD1 9SY, UK
| | - Anthony G. Hope
- Drug Discovery Unit, School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK
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14
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Zhang XY, Yan QX, Guo XY, Chen CR, Chen RQ, Cai ZM, Tang AF. Expression profile of SPACA5/ Spaca5 in spermatogenesis and transitional cell carcinoma of the bladder. Oncol Lett 2016; 12:3731-3738. [PMID: 27895724 PMCID: PMC5104159 DOI: 10.3892/ol.2016.5164] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 08/19/2016] [Indexed: 11/05/2022] Open
Abstract
The majority of bladder cancer-associated mortalities are due to transitional cell carcinoma (TCC), which is the most prevalent and chemoresistant malignancy of the bladder. Sperm acrosome associated 5 (SPACA5)/Spaca5 is a sperm acrosome-associated, c-type lysozyme-like protein that has been recently identified, and has been designated as an attractive candidate antigen for cancer testis. In the present study, the expression profile of SPACA5/Spaca5 was analyzed in spermatogenesis and TCC of the bladder using diverse molecular and cellular biology methods. Using reverse transcription-polymerase chain reaction (RT-PCR) to analyze the multi-tissue distribution and temporal expression of SPACA5/Spaca5, the SPACA5/Spaca5 gene was determined to be generally not expressed in normal tissue, with the exception of the testis, and it could be detected at a low level on day 20 after birth in mouse testes and at a higher level on day 28. Immunohistochemistry staining revealed that the SPACA5/Spaca5 protein was exclusively observed in the elongated spermatid of the normal testes, and was ectopically expressed in the cytoplasm of TCC, while it was not expressed in normal bladder tissues. The frequency of SPACA5 messenger RNA was detected in 45% of TCC (9/20) by RT-quantitative PCR. Furthermore, SPACA5 protein was more frequently detected in high-grade than in low-grade tumors (61.54 vs. 30.00%, P=0.035). Accordingly, high SPACA5 staining scores were observed to be significantly associated with high-grade tumors (n=65, R=0.279, P=0.027). Collectively, our findings indicated that SPACA5/Spaca5 may be important in male spermatogenesis and may be used as a potential target for specific immunotherapy in patients suffering from TCC.
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Affiliation(s)
- Xiao-Yue Zhang
- Department of Science and Education, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong 518035, P.R. China
| | - Qiu-Xia Yan
- Center for Reproductive Medicine of Obstetrics and Gynecology, The People's Hospital of Qingyuan, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan, Guangdong 511518, P.R. China
| | - Xiao-Yan Guo
- Center for Reproductive Medicine of Obstetrics and Gynecology, The People's Hospital of Qingyuan, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan, Guangdong 511518, P.R. China
| | - Cai-Rong Chen
- Center for Reproductive Medicine of Obstetrics and Gynecology, The People's Hospital of Qingyuan, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan, Guangdong 511518, P.R. China
| | - Run-Qiang Chen
- Center for Reproductive Medicine of Obstetrics and Gynecology, The People's Hospital of Qingyuan, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan, Guangdong 511518, P.R. China
| | - Zhi-Ming Cai
- Department of Science and Education, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong 518035, P.R. China
| | - Ai-Fa Tang
- Department of Science and Education, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong 518035, P.R. China
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15
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Song WY, Meng H, Wang XG, Jin HX, Yao GD, Shi SL, Wu L, Zhang XY, Sun YP. Reduced microRNA-188-3p expression contributes to apoptosis of spermatogenic cells in patients with azoospermia. Cell Prolif 2016; 50. [PMID: 27868267 DOI: 10.1111/cpr.12297] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Accepted: 08/24/2016] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND AND AIMS Human mutL homologl (MLH1) works coordinately in sequential steps to initiate repair of DNA mismatches, and aberrant MLH1 expression is related to spermatogenetic malfunction. In the present study, MLH1 expression in patients with azoospermia was investigated, and moderating effects of miR-188-3p on MLH1 expression and spermatogenesis were identified. METHODS Testicular tissues from 16 patients with obstructive azoospermia (OA) and non-obstructive azoospermia (NOA), and tissues of eight healthy patients were collected. Real-time PCR, Western blotting and immunohistochemical staining were used to detect MLH1 expression. Chromatin immunoprecipitation assay and luciferase reporter assay were performed to evaluate histone acetylation level of miR-188-3p and relationships between miR-188-3p and MLH1. RESULTS Testicular MLH1 expression at mRNA and protein levels was significantly increased, while miR-188-3p expression was lower in patients with OA and NOA than that in controls. Reduced histone acetylation level of miR-188-3p promoter was observed in patients with azoospermia. Overexpression/inhibition of HDAC1, but not HDAC2, contributed to the significant reduction/increase of miR-188-3p expression. miR-188-3p targeted 3' UTR of MLH1 and regulated MLH1 expression. miR-188-3p inhibitor led to elevation of apoptotic level of spermatogenic cells in mice, while this effect was reversed by si-MLH1. CONCLUSION Down-regulation of miR-188-3p by reducing histone acetylation up-regulated MLH1 expression and contributed to promotion of apoptosis in spermatogenic cells, in patients with azoospermia.
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Affiliation(s)
- Wen-Yan Song
- Reproductive Medicine Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Hui Meng
- Pathology Department, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xue-Gai Wang
- Reproductive Medicine Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Hai-Xia Jin
- Reproductive Medicine Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Gui-Dong Yao
- Reproductive Medicine Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Sen-Lin Shi
- Reproductive Medicine Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Liang Wu
- Reproductive Medicine Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xiang-Yang Zhang
- Reproductive Medicine Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Ying-Pu Sun
- Reproductive Medicine Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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16
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Mansouri E, Asadi-Samani M, Kooti W, Ghasemiboroon M, Ashtary-Larky D, Alamiri F, Afrisham R, Noohi ZH. Anti-fertility effect of hydro-alcoholic extract of fennel (Foeniculum vulgare Mill) seed in male Wistar rats. J Vet Res 2016. [DOI: 10.1515/jvetres-2016-0052] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Introduction: The study aimed to investigate the anti-fertility effect of fennel (Foeniculim vulgare Mill) seed extract in male rats.
Material and Methods: Forty Wistar rats were divided into five equal groups. The control group received distilled water and the experimental groups were orally administered 1 ml of hydro-alcoholic extract of fennel seed in four doses of 35, 70, 140, and 280 mg/kg/b.w. daily for 60 days. After the last gavage, the rats were anaesthetised and the caudal part of the right epididymis was used for sperm counting. After fixation of the testes, microscopic sections were prepared and histological changes were evaluated.
Results: The number of spermatogonia after doses of 140 and 280 mg/kg and Sertoli cells after a dose of 140 mg/kg decreased significantly as compared with the control group (P < 0.05). The number of primary spermatocytes and sperm count decreased significantly in the experimental groups (70, 140, and 280 mg/kg) when compared to the control group (P < 0.05). Furthermore, thickening of the basement membrane, cell apoptosis, and irregular arrangement of the germinal epithelium were observed in the experimental groups.
Conclusion: Hydro-alcoholic fennel seed extract at these doses could reduce reproductivity and has anti-fertility activity in male rats.
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Affiliation(s)
- Esrafil Mansouri
- Cellular and Molecular Research Center, Department of Anatomical Sciences, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran (Islamic Republic of)
| | - Majid Asadi-Samani
- Student Research Committee, Shahrekord University of Medical Sciences, Shahrekord, Iran (Islamic Republic of)
| | - Wesam Kooti
- Student Research Committee, Kurdistan University of Medical Sciences, Sanandaj, Iran (Islamic Republic of)
| | - Maryam Ghasemiboroon
- Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran (Islamic Republic of)
| | - Damoon Ashtary-Larky
- Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran (Islamic Republic of)
| | - Fatima Alamiri
- Sophomore/Health and Medical Studies, Henry Ford Early College at Henry Ford College, Dearborn, Michigan, United States of America
| | - Reza Afrisham
- Department of Clinical Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran (Islamic Republic of)
| | - Zahra Hasanzadeh Noohi
- Department of Biology, School of Science, Shiraz University, Shiraz, Iran (Islamic Republic of)
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17
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Salemi M, Condorelli RA, Longo G, Bullara V, Romano C, Campagna C, Bosco P, La Vignera S, Calogero AE. LDOC1 Gene Expression in Men With Klinefelter Syndrome. J Clin Lab Anal 2016; 30:408-10. [PMID: 27076087 DOI: 10.1002/jcla.21870] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 04/10/2015] [Accepted: 06/27/2015] [Indexed: 11/08/2022] Open
Abstract
Klinefelter syndrome (KS) results from an extra chromosome X, which is due to the failure of normal chromosomal segregation during meiosis. Patients with KS have gynecomastia, small testes, and azoospermia. Apoptosis is a mechanism responsible for the normal regulation of spermatogenesis. LDOC1 gene is a known regulator of nuclear factor mediated pathway to apoptosis through inhibition of nuclear factor kappa B (NF-kappaB). Furthermore, the transcription factor myeloid zinc finger gene 1 (MZF-1) has been shown to interact with LDOC1 and to enhance LDOC1 activity favoring apoptosis. We investigated the expression of LDOC1 gene mRNA, by quantitative reverse transcription polymerase chain reaction (qRT-PCR), in peripheral blood leukocytes of 13 patients with KS compared to 13 healthy men chosen as controls. LDOC1 expression was higher in 9 of the 13 KS patient compared to normal controls. These finding led us to hypothesize that LDOC1 gene upregulation may play a role in the spermatogenesis derangement observed in patients with KS.
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Affiliation(s)
- Michele Salemi
- Oasi Institute (IRCCS) for Research on Mental Retardation and Brain Aging, Troina, Italy. ,
| | - Rosita A Condorelli
- Section of Endocrinology,Andrology and Internal Medicine, Department of Medical and Pediatric Sciences, University of Catania, Catania, Italy
| | - Giusi Longo
- Laboratory Analysis, A.O.V. "Policlinico V. Emanuele", Presidio "Gaspare Rodolico" University of Catania, Catania, Italy
| | - Valentina Bullara
- Section of Endocrinology,Andrology and Internal Medicine, Department of Medical and Pediatric Sciences, University of Catania, Catania, Italy
| | - Carmelo Romano
- Oasi Institute (IRCCS) for Research on Mental Retardation and Brain Aging, Troina, Italy
| | - Cristina Campagna
- Section of Endocrinology,Andrology and Internal Medicine, Department of Medical and Pediatric Sciences, University of Catania, Catania, Italy
| | - Paolo Bosco
- Oasi Institute (IRCCS) for Research on Mental Retardation and Brain Aging, Troina, Italy
| | - Sandro La Vignera
- Section of Endocrinology,Andrology and Internal Medicine, Department of Medical and Pediatric Sciences, University of Catania, Catania, Italy
| | - Aldo E Calogero
- Section of Endocrinology,Andrology and Internal Medicine, Department of Medical and Pediatric Sciences, University of Catania, Catania, Italy
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18
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Grozdanov PN, Amatullah A, Graber JH, MacDonald CC. TauCstF-64 Mediates Correct mRNA Polyadenylation and Splicing of Activator and Repressor Isoforms of the Cyclic AMP-Responsive Element Modulator (CREM) in Mouse Testis. Biol Reprod 2015; 94:34. [PMID: 26700942 PMCID: PMC4787626 DOI: 10.1095/biolreprod.115.134684] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 12/17/2015] [Indexed: 12/12/2022] Open
Abstract
Spermatogenesis is coordinated by the spatial and temporal expression of many transcriptional and posttranscriptional factors. The cyclic AMP-responsive element modulator (CREM) gene encodes both activator and repressor isoforms that act as transcription factors to regulate spermiogenesis. We found that the testis-expressed paralog of CstF-64, tauCstF-64 (gene symbol Cstf2t), is involved in a polyadenylation site choice switch of Crem mRNA and leads to an overall decrease of the Crem mRNAs that are generated from internal promoters in Cstf2t(-/-) mice. More surprisingly, loss of tauCstF-64 also leads to alternative splicing of Crem exon 4, which contains an important activation domain. Thus, testis-specific CREMtau2 isoform protein levels are reduced in Cstf2t(-/-) mice. Consequently, expression of 15 CREM-regulated genes is decreased in testes of Cstf2t(-/-) mice at 25 days postpartum. These effects might further contribute to the infertility phenotype of these animals. This demonstrates that tauCstF-64 is an important stage-specific regulator of Crem mRNA processing that modulates the spatial and temporal expression of downstream stage-specific genes necessary for the proper development of sperm in mice.
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Affiliation(s)
- Petar N Grozdanov
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Atia Amatullah
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Joel H Graber
- Center for Genome Dynamics, The Jackson Laboratory, Bar Harbor, Maine
| | - Clinton C MacDonald
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, Texas
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19
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Nistal M, Paniagua R, González-Peramato P, Reyes-Múgica M. Perspectives in pediatric pathology, chapter 4. Pubertal and adult testis. Pediatr Dev Pathol 2015; 18:187-202. [PMID: 25993606 DOI: 10.2350/12-11-1271-pb.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Manuel Nistal
- Department of Pathology, Hospital La Paz, Universidad Autónoma de Madrid, Calle Arzobispo Morcillo #2, Madrid 28029, Spain
| | - Ricardo Paniagua
- Department of Cell Biology, Universidad de Alcala, Madrid, Spain
| | - Pilar González-Peramato
- Department of Pathology, Hospital La Paz, Universidad Autónoma de Madrid, Calle Arzobispo Morcillo #2, Madrid 28029, Spain
| | - Miguel Reyes-Múgica
- Department of Pathology, Children's Hospital of Pittsburgh of UPMC, One Children's Hospital Drive, 4401 Penn Avenue, Pittsburgh, PA 15224, USA
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20
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Cardoso HJ, Figueira MI, Correia S, Vaz CV, Socorro S. The SCF/c-KIT system in the male: Survival strategies in fertility and cancer. Mol Reprod Dev 2014; 81:1064-79. [PMID: 25359157 DOI: 10.1002/mrd.22430] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 09/25/2014] [Indexed: 12/18/2022]
Abstract
Maintaining the delicate balance between cell survival and death is of the utmost importance for the proper development of germ cells and subsequent fertility. On the other hand, the fine regulation of tissue homeostasis by mechanisms that control cell fate is a factor that can prevent carcinogenesis. c-KIT is a type III receptor tyrosine kinase activated by its ligand, stem cell factor (SCF). c-KIT signaling plays a crucial role in cell fate decisions, specifically controlling cell proliferation, differentiation, survival, and apoptosis. Indeed, deregulating the SCF/c-KIT system by attenuation or overactivation of its signaling strength is linked to male infertility and cancer, and rebalancing its activity via c-KIT inhibitors has proven beneficial in treating human tumors that contain gain-of-function mutations or overexpress c-KIT. This review addresses the roles of SCF and c-KIT in the male reproductive tract, and discusses the potential application of c-KIT target therapies in disorders of the reproductive system.
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Affiliation(s)
- Henrique J Cardoso
- CICS-UBI-Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
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21
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Kooti W, Mansouri E, Ghasemiboroon M, Harizi M, Ashtary-Larky D, Afrisham R. The Effects of Hydroalcoholic Extract of Apium graveolens Leaf on the Number of Sexual Cells and Testicular Structure in Rat. Jundishapur J Nat Pharm Prod 2014; 9:e17532. [PMID: 25625050 PMCID: PMC4302398 DOI: 10.17795/jjnpp-17532] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2014] [Revised: 03/11/2014] [Accepted: 07/04/2014] [Indexed: 11/25/2022] Open
Abstract
Background: Use of medicinal plants with high antioxidant properties could be effective to increase fertility and improvement of disorders such as hormonal imbalance, impotency, oligospermia and immotile sperm. Celery (Apium graveolens) is rich in antioxidant agents. The leaf and stems of celery contain phenols, furanocoumarin and luteolin. Apigenin is one of the main flavonoids of celery leaf. Objectives: This study aimed to investigate the effects of hydroalcoholic extract of celery on histological properties of testis and number of sexual cells in male rats. Materials and Methods: Thirty-two male Wistar rats were divided into four groups of eight rats each. Control, did not receive any medication; sham, received normal saline; and two groups received celery extract orally in dosages of 100 and 200 mg/kg/BW once every two days for 60 days. At the end, animals were anesthetized, and caudal part of the right epididymis was used for sperm counting. After fixation of testis, tissue sections were prepared and studied microscopically to evaluate morphometric (lumen diameter, number of primary spermatocyte and sertoli cell) and histological changes. Data was analyzed by one-way ANOVA test using SPSS15 software. P < 0.05 was considered as statistically significant. Results: There was a significant increase in the number of sperms, sertoli cells, and primary spermatocyte (P < 0.05) in groups receiving extract; however, structural changes were not observed in the groups. Conclusions: It seems that celery increases spermatogenesis in male rats, but has no destructive effects on testicular tissue.
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Affiliation(s)
- Wesam Kooti
- Department of Immunology, School of Medicine, Kurdistan University of Medical Sciences, Sanandaj, IR Iran ; Student Research Committee, Kurdistan University of Medical Sciences, Sanandaj, IR Iran
| | - Esrafil Mansouri
- Cellular and Molecular Research Center, Department of Anatomical Sciences, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, IR Iran
| | - Maryam Ghasemiboroon
- Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, IR Iran
| | - Mahmoud Harizi
- Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, IR Iran
| | - Damoon Ashtary-Larky
- Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, IR Iran ; Department of Clinical Biochemistry, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, IR Iran
| | - Reza Afrisham
- Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, IR Iran
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22
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Meng L, Zhu Y, Zhang N, Liu W, Liu Y, Shao C, Wang N, Chen S. Cloning and characterization of tesk1, a novel spermatogenesis-related gene, in the tongue sole (Cynoglossus semilaevis). PLoS One 2014; 9:e107922. [PMID: 25271995 PMCID: PMC4182740 DOI: 10.1371/journal.pone.0107922] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Accepted: 08/24/2014] [Indexed: 11/19/2022] Open
Abstract
Testis-specific protein kinase 1 (Tesk1) is a serine/threonine kinase with unique structural features. In the present study, we cloned and characterized the tesk1 gene of tongue sole, Cynoglossus semilaevis. The full-length tesk1 cDNA consists of 1,672 nucleotides, encoding a 331 amino acid polypeptide with a characteristic structure composed of an N-terminal kinase domain and a C-terminal proline-rich domain. The tesk1 genomic sequence contains eight exons and seven introns. Real-time quantitative PCR revealed that tesk1 mRNA is expressed predominantly in the testis, though the level of expression varied throughout development. We used in situ hybridization to show that tesk1 mRNA is expressed in the spermatids of males and pseudo-males, but not in triploid males. Our results suggest that tongue sole Tesk1 may play a role in spermatogenesis.
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Affiliation(s)
- Liang Meng
- College of Marine Life Science, Ocean University of China, Qingdao, PR China
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, PR China
| | - Ying Zhu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, PR China
| | - Ning Zhang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, PR China
| | - Wanjun Liu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, PR China
| | - Yang Liu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, PR China
| | - Changwei Shao
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, PR China
| | - Na Wang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, PR China
| | - Songlin Chen
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, PR China
- * E-mail:
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Dong WW, Huang HL, Yang W, Liu J, Yu Y, Zhou SL, Wang W, Lv XC, Li ZY, Zhang MY, Zheng ZH, Yan W. Testis-specific Fank1 gene in knockdown mice produces oligospermia via apoptosis. Asian J Androl 2014; 16:124-30. [PMID: 24369145 PMCID: PMC3901870 DOI: 10.4103/1008-682x.122592] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Fank1 is exclusively expressed in the testis from the meiosis phase to the haploid phase of spermatogenesis. In this study, we examined the function of Fank1 by establishing a Fank1-knockdown transgenic mouse model. The apoptotic statuses of the testes of the transgenic mice were tested using the terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) method. The FANK1 consensus DNA-binding sequence was identified using cyclic amplification of sequence target (CAST) analysis. Differentially expressed genes were examined using microarray analysis. A reduction in sperm number and an increase in apoptotic spermatocytes were observed in Fank1-knockdown mice, and the apoptotic cells were found to be primarily spermatogonia and spermatocytes. The CAST results demonstrated that the consensus DNA-binding sequence was AAAAAG, in which the percentage occurrence of each base at each position ranged from 55 to 86%. This sequence was present in the promoter regions of 10 differentially expressed genes that were examined using microarray analysis. In total, 17 genes were differentially expressed with changes in their expression levels greater than twofold. The abnormal expression of Fank1 target genes that were regulated directly or indirectly by Fank1 reduced the number of sperm in the knockdown mice. Thus, FANK1 may play a pivotal role in spermatogenesis as a transcription factor.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Zhi-Hong Zheng
- Laboratory Animal Centre; Department of Pathology and Pathophysiology Research, China Medical University, Shenyang, China
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Campbell AM, Zhang ZY. Phosphatase of regenerating liver: a novel target for cancer therapy. Expert Opin Ther Targets 2014; 18:555-69. [PMID: 24579927 DOI: 10.1517/14728222.2014.892926] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Phosphatases of regenerating livers (PRLs) are novel oncogenes that interact with many well-established cell signaling pathways that are misregulated in cancer, and are known to drive cancer metastasis when overexpressed. AREAS COVERED This review covers basic information of the discovery and characteristics of the PRL family. We also report findings on the role of PRL in cancer, cell functions and cell signaling. Furthermore, PRL's suitability as a novel drug target is discussed along with current methods being developed to facilitate PRL inhibition. EXPERT OPINION PRLs show great potential as novel drug targets for anticancer therapeutics. Studies indicate that PRL can perturb major cancer pathways such as Src/ERK1/2 and PTEN/PI3K/Akt. Upregulation of PRLs has also been shown to drive cancer metastasis. However, in order to fully realize its therapeutic potential, a deeper understanding of the function of PRL in normal tissue and in cancer must be obtained. Novel and integrated biochemical, chemical, biological, and genetic approaches will be needed to identify PRL substrate(s) and to provide proof-of-concept data on the druggability of the PRL phosphatases.
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Affiliation(s)
- Amanda M Campbell
- Indiana University School of Medicine, Department of Biochemistry and Molecular Biology , John D. Van Nuys Medical Science Building, Room 4053A, 635 Barnhill Drive, Indianapolis, IN 46202-5126 , USA
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Hou CC, Yang WX. New insights to the ubiquitin–proteasome pathway (UPP) mechanism during spermatogenesis. Mol Biol Rep 2012; 40:3213-30. [DOI: 10.1007/s11033-012-2397-y] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2012] [Accepted: 12/17/2012] [Indexed: 12/12/2022]
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Shang P, Hoogerbrugge J, Baarends WM, Grootegoed JA. Evolution of testis-specific kinases TSSK1B and TSSK2 in primates. Andrology 2012; 1:160-8. [PMID: 23258646 DOI: 10.1111/j.2047-2927.2012.00021.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Revised: 08/28/2012] [Accepted: 08/30/2012] [Indexed: 11/30/2022]
Abstract
The testis-specific serine/threonine protein kinases TSSK1 and TSSK2 are known to be essential for male fertility, in mice. The enzymes are present in elongating spermatids, and targeted deletion of the two genes Tssk1 and Tssk2 results in dysregulation of spermiogenesis. The mouse genes are genetically closely linked, forming a Tssk1-Tssk2 tandem. In human, TSSK1 is present in the form of a pseudogene, TSSK1A, which is linked to an intact TSSK2 gene, and in the form of an intact gene, TSSK1B, which is not genetically linked to TSSK2. Studies on conservation of genes and gene function between mouse and human are relevant, to be able to use mouse models for studies on human infertility, and to evaluate possible targets for non-hormonal contraception targeting the male. Therefore, we have performed a detailed analysis of the evolution of genes encoding TSSK1 and TSSK2 among mammals, in particular among primates. This study includes functional analysis of replacement mutation K27R in TSSK2, which is frequently observed among humans. In primates, the kinase domains of TSSK1B and TSSK2 have evolved under negative selection, reflecting the importance to maintain their kinase activity. Positive selection was observed for the C-terminal domain of TSSK1B, which indicates that TSSK1B and TSSK2 may perform at least partly differential functions.
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Affiliation(s)
- P Shang
- Department of Reproduction and Development, Erasmus MC-University Medical Center, Rotterdam, The Netherlands
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Yan Q, Wu X, Chen C, Diao R, Lai Y, Huang J, Chen J, Yu Z, Gui Y, Tang A, Cai Z. Developmental expression and function of DKKL1/Dkkl1 in humans and mice. Reprod Biol Endocrinol 2012; 10:51. [PMID: 22817830 PMCID: PMC3442974 DOI: 10.1186/1477-7827-10-51] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Accepted: 06/27/2012] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Experiments were designed to identify the developmental expression and function of the Dickkopf-Like1 (DKKL1/Dkkl1) gene in humans and mice. METHODS Mouse testes cDNA samples were collected at multiple postnatal times (days 4, 9, 18, 35, and 54, as well as at 6 months) and hybridized to Affymetrix mouse whole genome Genechips. To further characterize the homologous gene DKKL1 in human beings, the expression profiles between human adult testis and foetal testis were compared using Affymetrix human Genechips. The characteristics of DKKL1/Dkkl1 were analysed using various cellular and molecular biotechnologies. RESULTS The expression of Dkkl1 was not detected in mouse testes on days 4 or 9, but was present on days 18, 35, and 54, as well as at 6 months, which was confirmed by RT-PCR and Western blot results. Examination of the tissue distribution of Dkkl1 demonstrated that while Dkkl1 mRNA was abundantly expressed in testes, little to no expression of Dkkl1 was observed in the epididymis or other tissues. In an in vitro fertilization assay, a Dkkl1 antibody was found to significantly reduce fertilization. Human Genechips results showed that the hybridization signal intensity of DKKL1 was 405.56-fold higher in adult testis than in foetal testis. RT-PCR analysis of multiple human tissues indicated that DKKL1 mRNA was exclusively expressed in the testis. Western blot analysis also demonstrated that DKKL1 was mainly expressed in human testis with a molecular weight of approximately 34 kDa. Additionally, immunohistochemical staining showed that the DKKL1 protein was predominantly located in spermatocytes and round spermatids in human testes. An examination of the expression levels of DKKL1 in infertile male patients revealed that while no DKKL1 appeared in the testes of patients with Sertoli cell only syndrome (SCOS) or cryptorchidism, DKKL1 was observed with variable expression in patients with spermatogenic arrest. CONCLUSIONS These results, together with previous studies, suggest that DKKL1/Dkkl1 may play an important role in testicular development and spermatogenesis and may be an important factor in male infertility.
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Affiliation(s)
- Qiuxia Yan
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The People's Hospital of Qingyuan, The Fifth Affiliated Hospital of Medical College of Jinan University, Qingyuan, China
| | - Xiaoping Wu
- Institute of Tissue Transplantation and Immunology, Jinan University, Guangzhou, China
| | - Cairong Chen
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The People's Hospital of Qingyuan, The Fifth Affiliated Hospital of Medical College of Jinan University, Qingyuan, China
| | - Ruiying Diao
- Guangdong Key Lab of Male Reproductive Medicine and Genetics, Peking University Shenzhen Hospital, Shenzhen, China
| | - Yongqing Lai
- Guangdong Key Lab of Male Reproductive Medicine and Genetics, Peking University Shenzhen Hospital, Shenzhen, China
| | - Jun Huang
- Guangdong Key Lab of Male Reproductive Medicine and Genetics, Peking University Shenzhen Hospital, Shenzhen, China
| | - Jing Chen
- Guangdong Key Lab of Male Reproductive Medicine and Genetics, Peking University Shenzhen Hospital, Shenzhen, China
| | - Zhou Yu
- Guangdong Key Lab of Male Reproductive Medicine and Genetics, Peking University Shenzhen Hospital, Shenzhen, China
| | - Yaoting Gui
- Guangdong Key Lab of Male Reproductive Medicine and Genetics, Peking University Shenzhen Hospital, Shenzhen, China
| | - Aifa Tang
- Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Zhiming Cai
- Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
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Riboldi M, Rubio C, Pellicer A, Gil-Salom M, Simón C. In vitro production of haploid cells after coculture of CD49f+ with Sertoli cells from testicular sperm extraction in nonobstructive azoospermic patients. Fertil Steril 2012; 98:580-590.e4. [PMID: 22732736 DOI: 10.1016/j.fertnstert.2012.05.039] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Revised: 04/15/2012] [Accepted: 05/25/2012] [Indexed: 02/06/2023]
Abstract
OBJECTIVE To isolate CD49f+ cells from testicular sperm extraction (TESE) samples of azoospermic patients and induce meiosis by coculturing these cells with Sertoli cells. DESIGN Prospective analysis. SETTING Research center. PATIENT(S) Obstructive azoospermic (OA) and nonobstructive azoospermic (NOA) patients. INTERVENTION(S) TESE, with enzymatic dissociation of samples to obtain a cell suspension, which was cultured for 4 days with 4 ng/mL GDNF. The CD49f+ cells were sorted using fluorescence-activated cell sorting (FACS) as a marker to identify spermatogonial stem cells (SSCs), which were cocultured with Sertoli cells expressing red fluorescent protein (RFP) in knockout serum replacement (KSR) media with addition of 1,000 IU/mL of follicle-stimulating hormone (FSH), 1 μM testosterone, 40 ng/mL of GDNF, and 2 μM retinoic acid (RA) for 15 days in culture at 37°C and 5% CO(2) to induce meiotic progression. Cells were collected and analyzed by immunofluorescence for meiosis progression with specific markers SCP3 and CREST, and they were confirmed by fluorescence in situ hybridization (FISH). MAIN OUTCOME MEASURE(S) Isolation of CD49f+ cells and coculture with Sertoli cells, meiosis progression in vitro, assessment of SSCs and meiotic markers real-time polymerase chain reaction (RT-PCR), immunohistochemical analysis, and FISH. RESULT(S) The CD49f+ isolated from the of total cell count in the TESE samples of azoospermic patients varied from 5.45% in OA to 2.36% in NOA. Sertoli cells were obtained from the same TESE samples, and established protocols were used to characterize them as positive for SCF, rGDNF, WT1, GATA-4, and vimentin, with the presence of tight junctions and lipid droplets shown by oil red staining. After isolation, the CD49f+ cells were cocultured with RFP Sertoli cells in a 15-day time-course experiment. Positive immunostaining for meiosis markers SCP3 and CREST on days 3 to 5 was noted in the samples obtained from one NOA patient. A FISH analysis for chromosomes 13, 18, 21, X, and Y confirmed the presence of haploid cells on day 5 of the coculture. CONCLUSION(S) In vitro coculture of SSCs from TESE samples of NOA patients along with Sertoli cells promoted meiosis induction and resulted in haploid cell generation. These results improve the existing protocols to generate spermatogenesis in vitro and open new avenues for clinical translation in azoospermic patients.
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Affiliation(s)
- Marcia Riboldi
- Valencia Node of the Spanish Stem Cell Bank, Prince Felipe Research Centre (CIPF), Valencia, Spain.
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Hu Y, Wen W, Yu JG, Qu SQ, Wang SS, Liu J, Li BS, Luo Y. Genetic association of UBE2B variants with susceptibility to male infertility in a Northeast Chinese population. GENETICS AND MOLECULAR RESEARCH 2012; 11:4226-34. [DOI: 10.4238/2012.september.12.2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Hockert KJ, Martincic K, Mendis-Handagama SMLC, Borghesi LA, Milcarek C, Dass B, MacDonald CC. Spermatogenetic but not immunological defects in mice lacking the τCstF-64 polyadenylation protein. J Reprod Immunol 2011; 89:26-37. [PMID: 21489638 DOI: 10.1016/j.jri.2011.01.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Revised: 01/07/2011] [Accepted: 01/16/2011] [Indexed: 12/31/2022]
Abstract
Alternative polyadenylation controls expression of genes in many tissues including immune cells and male germ cells. The τCstF-64 polyadenylation protein is expressed in both cell types, and we previously showed that Cstf2t, the gene encoding τCstF-64 was necessary for spermatogenesis and fertilization. Here we examine consequences of τCstF-64 loss in both germ cells and immune cells. Spermatozoa from Cstf2t null mutant (Cstf2t(-/-)) mice of ages ranging from 60 to 108 days postpartum exhibited severe defects in motility and morphology that were correlated with a decrease in numbers of round spermatids. Spermatozoa in these mice also displayed severe morphological defects at every age, especially in the head and midpiece. In the testicular epithelium, we saw normal numbers of cells in earlier stages of spermatogenesis, but reduced numbers of round spermatids in Cstf2t(-/-) mice. Although Leydig cell numbers were normal, we did observe reduced levels of plasma testosterone in the knockout animals, suggesting that reduced androgen might also be contributing to the Cstf2t(-/-) phenotype. Finally, while τCstF-64 was expressed in a variety of immune cell types in wild type mice, we did not find differences in secreted IgG or IgM or changes in immune cell populations in Cstf2t(-/-) mice, suggesting that τCstF-64 function in immune cells is either redundant or vestigial. Together, these data show that τCstF-64 function is primarily to support spermatogenesis, but only incidentally to support immune cell function.
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Affiliation(s)
- Kathy Jo Hockert
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Texas, Lubbock, TX 79430, USA
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Genes for embryo development are packaged in blocks of multivalent chromatin in zebrafish sperm. Genome Res 2011; 21:578-89. [PMID: 21383318 DOI: 10.1101/gr.113167.110] [Citation(s) in RCA: 155] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
In mature human sperm, genes of importance for embryo development (i.e., transcription factors) lack DNA methylation and bear nucleosomes with distinctive histone modifications, suggesting the specialized packaging of these developmental genes in the germline. Here, we explored the tractable zebrafish model and found conceptual conservation as well as several new features. Biochemical and mass spectrometric approaches reveal the zebrafish sperm genome packaged in nucleosomes and histone variants (and not protamine), and we find linker histones high and H4K16ac absent, key factors that may contribute to genome condensation. We examined several activating (H3K4me2/3, H3K14ac, H2AFV) and repressing (H3K27me3, H3K36me3, H3K9me3, hypoacetylation) modifications/compositions genome-wide and find developmental genes packaged in large blocks of chromatin with coincident activating and repressing marks and DNA hypomethylation, revealing complex "multivalent" chromatin. Notably, genes that acquire DNA methylation in the soma (muscle) are enriched in transcription factors for alternative cell fates. Remarkably, whereas H3K36me3 is located in the 3' coding region of heavily transcribed genes in somatic cells, H3K36me3 is present in the promoters of "silent" developmental regulators in sperm, suggesting different rules for H3K36me3 in the germline and soma. We also reveal the chromatin patterns of transposons, rDNA, and tDNAs. Finally, high levels of H3K4me3 and H3K14ac in sperm are correlated with genes activated in embryos prior to the mid-blastula transition (MBT), whereas multivalent genes are correlated with activation at or after MBT. Taken together, gene sets with particular functions in the embryo are packaged by distinctive types of complex and often atypical chromatin in sperm.
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Roles of Small Ubiquitin-Related Modifiers in Male Reproductive Function. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2011; 288:227-59. [DOI: 10.1016/b978-0-12-386041-5.00006-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Mulugeta Achame E, Baarends WM, Gribnau J, Grootegoed JA. Evaluating the relationship between spermatogenic silencing of the X chromosome and evolution of the Y chromosome in chimpanzee and human. PLoS One 2010; 5:e15598. [PMID: 21179482 PMCID: PMC3001880 DOI: 10.1371/journal.pone.0015598] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Accepted: 11/12/2010] [Indexed: 02/06/2023] Open
Abstract
Chimpanzees and humans are genetically very similar, with the striking exception of their Y chromosomes, which have diverged tremendously. The male-specific region (MSY), representing the greater part of the Y chromosome, is inherited from father to son in a clonal fashion, with natural selection acting on the MSY as a unit. Positive selection might involve the performance of the MSY in spermatogenesis. Chimpanzees have a highly polygamous mating behavior, so that sperm competition is thought to provide a strong selective force acting on the Y chromosome in the chimpanzee lineage. In consequence of evolution of the heterologous sex chromosomes in mammals, meiotic sex chromosome inactivation (MSCI) results in a transcriptionally silenced XY body in male meiotic prophase, and subsequently also in postmeiotic repression of the sex chromosomes in haploid spermatids. This has evolved to a situation where MSCI has become a prerequisite for spermatogenesis. Here, by analysis of microarray testicular expression data representing a small number of male chimpanzees and men, we obtained information indicating that meiotic and postmeiotic X chromosome silencing might be more effective in chimpanzee than in human spermatogenesis. From this, we suggest that the remarkable reorganization of the chimpanzee Y chromosome, compared to the human Y chromosome, might have an impact on its meiotic interactions with the X chromosome and thereby on X chromosome silencing in spermatogenesis. Further studies will be required to address comparative functional aspects of MSCI in chimpanzee, human, and other placental mammals.
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Affiliation(s)
- Eskeatnaf Mulugeta Achame
- Department of Reproduction and Development, Erasmus MC - University Medical Center, Rotterdam, The Netherlands
| | - Willy M. Baarends
- Department of Reproduction and Development, Erasmus MC - University Medical Center, Rotterdam, The Netherlands
| | - Joost Gribnau
- Department of Reproduction and Development, Erasmus MC - University Medical Center, Rotterdam, The Netherlands
| | - J. Anton Grootegoed
- Department of Reproduction and Development, Erasmus MC - University Medical Center, Rotterdam, The Netherlands
- * E-mail:
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Oliva R, Castillo J. Proteomics and the genetics of sperm chromatin condensation. Asian J Androl 2010; 13:24-30. [PMID: 21042303 DOI: 10.1038/aja.2010.65] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Spermatogenesis involves extremely marked cellular, genetic and chromatin changes resulting in the generation of the highly specialized sperm cell. Proteomics allows the identification of the proteins that compose the spermatogenic cells and the study of their function. The recent developments in mass spectrometry (MS) have markedly increased the throughput to identify and to study the sperm proteins. Catalogs of thousands of testis and spermatozoan proteins in human and different model species are becoming available, setting up the basis for subsequent research, diagnostic applications and possibly the future development of specific treatments. The present review intends to summarize the key genetic and chromatin changes at the different stages of spermatogenesis and in the mature sperm cell and to comment on the presently available proteomic studies.
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Affiliation(s)
- Rafael Oliva
- Human Genetics Research Group, IDIBAPS, Department of Ciencias Fisiológicas I, Faculty of Medicine, University of Barcelona, Barcelona 08036, Spain.
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Kosova B, Cetintaş VB, Yavaşoğlu A, Altay B, Aktuğ H. From a molecular biological viewpoint, does endothelin type A receptor antagonist therapy reduce diabetes-induced testicular damage in rats? Urology 2010; 77:250.e7-13. [PMID: 20630572 DOI: 10.1016/j.urology.2010.04.052] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Revised: 04/12/2010] [Accepted: 04/16/2010] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To evaluate the therapeutic effects of a selective endothelin type A receptor antagonist (ERA-A) on testis of streptozotocin (STZ)-induced diabetic rats. METHODS Eighty rats were analyzed in 4 groups: healthy controls, diabetic rats, diabetic rats treated with ERA-A, and healthy rats treated with ERA-A. Diabetes was induced in 40 rats by a single intraperitoneal injection of STZ and followed for 2 months. A total of 20 diabetic and 20 healthy rats were also intravenously treated with ERA-A at days 7 and 15. The remaining untreated healthy rats served as controls. Blood glucose levels of ≥ 250 mg/dL were considered to indicate diabetes and were measured at the end of the second month. Formalin-fixed paraffin-embedded testis tissue sections were analyzed after staining with hematoxylin and eosin or specific antibodies for apoptotic markers. mRNA expressions of genes involved in the apoptotic pathway or spermatogenesis were evaluated by real-time reverse transcription-polymerase chain reaction. RESULTS Major therapeutic effects of ERA-A could be achieved for damages caused by oxidative stress. Although a decrease in apoptotic cell death could be detected, no statistically meaningful results could be obtained for the duration of spermatogenesis. CONCLUSIONS ERA-A could prevent germ cell death by apoptosis and testicular damage in diabetic rats.
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Affiliation(s)
- Buket Kosova
- Department of Medical Biology, Ege University School of Medicine, Izmir, Turkey
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Hermo L, Pelletier RM, Cyr DG, Smith CE. Surfing the wave, cycle, life history, and genes/proteins expressed by testicular germ cells. Part 4: intercellular bridges, mitochondria, nuclear envelope, apoptosis, ubiquitination, membrane/voltage-gated channels, methylation/acetylation, and transcription factors. Microsc Res Tech 2010; 73:364-408. [PMID: 19941288 DOI: 10.1002/jemt.20785] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
As germ cells divide and differentiate from spermatogonia to spermatozoa, they share a number of structural and functional features that are common to all generations of germ cells and these features are discussed herein. Germ cells are linked to one another by large intercellular bridges which serve to move molecules and even large organelles from the cytoplasm of one cell to another. Mitochondria take on different shapes and features and topographical arrangements to accommodate their specific needs during spermatogenesis. The nuclear envelope and pore complex also undergo extensive modifications concomitant with the development of germ cell generations. Apoptosis is an event that is normally triggered by germ cells and involves many proteins. It occurs to limit the germ cell pool and acts as a quality control mechanism. The ubiquitin pathway comprises enzymes that ubiquitinate as well as deubiquitinate target proteins and this pathway is present and functional in germ cells. Germ cells express many proteins involved in water balance and pH control as well as voltage-gated ion channel movement. In the nucleus, proteins undergo epigenetic modifications which include methylation, acetylation, and phosphorylation, with each of these modifications signaling changes in chromatin structure. Germ cells contain specialized transcription complexes that coordinate the differentiation program of spermatogenesis, and there are many male germ cell-specific differences in the components of this machinery. All of the above features of germ cells will be discussed along with the specific proteins/genes and abnormalities to fertility related to each topic.
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Affiliation(s)
- Louis Hermo
- Department of Anatomy and Cell Biology, Faculty of Medicine, McGill University, 3640 University Street, Montreal, QC Canada H3A 2B2.
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Liu ML, Pei KY, Shi XQ, Liu DY, Jia MC. Identification and characterization of a novel spermatogenesis related gene LM23 in rat testis. Biochem Biophys Res Commun 2007; 356:576-81. [PMID: 17376406 DOI: 10.1016/j.bbrc.2007.03.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2007] [Accepted: 03/01/2007] [Indexed: 11/21/2022]
Abstract
The aim of this study is to screen the novel gene related to the spermatogenesis. A novel rat testis-specific gene LM23 was identified and characterized by differential display PCR with total RNA from rat type A spermatogonia, pachytene spermatocytes, and round spermatids. LM23 cDNA consists of 1896 base pairs (bp) with a complete open reading frame of 936 bp, and encodes a putative protein including 312 amino acids, which shares no significant homology with any known gene. The sequence of LM23 was submitted to GenBank and the Accession No. was AF492385. Multitissue Northern blot and RT-PCR analysis showed LM23 was specific expression in testis, while its expression was not detected in other tissues. Real-time PCR analysis showed that the expression level of LM23 was highest in spermatocytes and very low in spermatogonia. In situ hybridization revealed strong cytoplasmic positive signal in spermatocytes and weak signal in spermatids and spermatogonia. These results indicated LM23 possessed the testis-specific and stage-specific expression characteristics, and possibly involved in rat spermatogenesis.
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Affiliation(s)
- Mei-ling Liu
- Department of Reproductive Endocrinology, National Research Institute for Family Planning, No. 12 Da Hui Si, Hai Dian District, Beijing 100081, PR China.
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Abstract
Protamines are the major nuclear sperm proteins. The human sperm nucleus contains two types of protamine: protamine 1 (P1) encoded by a single-copy gene and the family of protamine 2 (P2) proteins (P2, P3 and P4), all also encoded by a single gene that is transcribed and translated into a precursor protein. The protamines were discovered more than a century ago, but their function is not yet fully understood. In fact, different hypotheses have been proposed: condensation of the sperm nucleus into a compact hydrodynamic shape, protection of the genetic message delivered by the spermatozoa, involvement in the processes maintaining the integrity and repair of DNA during or after the nucleohistone-nucleoprotamine transition and involvement in the epigenetic imprinting of the spermatozoa. Protamines are also one of the most variable proteins found in nature, with data supporting a positive Darwinian selection. Changes in the expression of P1 and P2 protamines have been found to be associated with infertility in man. Mutations in the protamine genes have also been found in some infertile patients. Transgenic mice defective in the expression of protamines also present several structural defects in the sperm nucleus and have variable degrees of infertility. There is also evidence that altered levels of protamines may result in an increased susceptibility to injury in the spermatozoan DNA causing infertility or poor outcomes in assisted reproduction. The present work reviews the articles published to date on the relationship between protamines and infertility.
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Affiliation(s)
- Rafael Oliva
- Human Genetics Laboratory, Genetics Unit, Department of Ciències Fisiològiques I, Faculty of Medicine, University of Barcelona and Hospital Clínic, IDIBAPS, Casanova 143, 08036 Barcelona, Spain.
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Gonzalez-Herrera IG, Prado-Lourenco L, Pileur F, Conte C, Morin A, Cabon F, Prats H, Vagner S, Bayard F, Audigier S, Prats AC. Testosterone regulates FGF-2 expression during testis maturation by an IRES-dependent translational mechanism. FASEB J 2006; 20:476-8. [PMID: 16423876 DOI: 10.1096/fj.04-3314fje] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Spermatogenesis is a complex process involving cell proliferation, differentiation, and apoptosis. Fibroblast growth factor 2 (FGF-2) is involved in testicular function, but its role in spermatogenesis has not been fully documented. The control of FGF-2 expression particularly occurs at the translational level, by an internal ribosome entry site (IRES)-dependent mechanism driving the use of alternative initiation codons. To study IRES activity regulation in vivo, we have developed transgenic mice expressing a bicistronic construct coding for two luciferase genes. Here, we show that the FGF-2 IRES is age-dependently activated in mouse testis, whereas EMCV and c-myc IRESs are not. Real-time PCR confirms that this regulation is translational. By using immunohistological techniques, we demonstrate that FGF-2 IRES stimulation occurs in adult, but not in immature, type-A spermatogonias. This is correlated with activation of endogenous FGF-2 expression in spermatogonia; whereas FGF-2 mRNA transcription is known to decrease in adult testis. Interestingly, the FGF-2 IRES activation is triggered by testosterone and is partially inhibited by siRNA directed against the androgen receptor. Two-dimensional analysis of proteins bound to the FGF-2 mRNA 5'UTR after UV cross-linking reveals that testosterone treatment correlates with the binding of several proteins. These data suggest a paracrine loop where IRES-dependent FGF-2 expression, stimulated by Sertoli cells in response to testosterone produced by Leydig cells, would in turn activate Leydig function and testosterone production. In addition, nuclear FGF-2 isoforms could be involved in an intracrine function of FGF-2 in the start of spermatogenesis, mitosis, or meiosis initiation. This report demonstrates that mRNA translation regulation by an IRES-dependent mechanism participates in a physiological process.
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MESH Headings
- 5' Untranslated Regions
- Age Factors
- Androgen Receptor Antagonists
- Animals
- Codon
- Fibroblast Growth Factor 2/biosynthesis
- Fibroblast Growth Factor 2/genetics
- Fibroblast Growth Factor 2/physiology
- Genes, Reporter
- Genes, Synthetic
- Leydig Cells/physiology
- Luciferases, Renilla/genetics
- Male
- Meiosis
- Mice
- Mice, Transgenic
- Mitosis
- Paracrine Communication
- Peptide Chain Initiation, Translational/physiology
- Protein Biosynthesis
- Protein Isoforms/physiology
- RNA, Messenger/genetics
- RNA, Messenger/radiation effects
- RNA, Small Interfering/pharmacology
- Receptors, Androgen/genetics
- Recombinant Fusion Proteins/physiology
- Regulatory Sequences, Nucleic Acid
- Ribosomes/metabolism
- Sertoli Cells/physiology
- Spermatogenesis/physiology
- Testis/growth & development
- Testis/metabolism
- Testis/physiology
- Testosterone/metabolism
- Testosterone/pharmacology
- Testosterone/physiology
- Ultraviolet Rays
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40
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Marchetti F, Wyrobek AJ. Mechanisms and consequences of paternally-transmitted chromosomal abnormalities. ACTA ACUST UNITED AC 2005; 75:112-29. [PMID: 16035041 DOI: 10.1002/bdrc.20040] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Paternally-transmitted chromosomal damage has been associated with pregnancy loss, developmental and morphological defects, infant mortality, infertility, and genetic diseases in the offspring, including cancer. There is epidemiological evidence linking paternal exposure to occupational or environmental agents with an increased risk of abnormal reproductive outcomes. There is also a large body of literature on germ cell mutagenesis in rodents showing that treatment of male germ cells with mutagens has dramatic consequences on reproduction, producing effects such as those observed in human epidemiological studies. However, we know very little about the etiology, transmission, and early embryonic consequences of paternally-derived chromosomal abnormalities. The available evidence suggests that: 1) there are distinct patterns of germ cell-stage differences in the sensitivity of induction of transmissible genetic damage, with male postmeiotic cells being the most sensitive; 2) cytogenetic abnormalities at first metaphase after fertilization are critical intermediates between paternal exposure and abnormal reproductive outcomes; and 3) there are maternal susceptibility factors that may have profound effects on the amount of sperm DNA damage that is converted into chromosomal aberrations in the zygote and that directly affect the risk for abnormal reproductive outcomes.
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Affiliation(s)
- Francesco Marchetti
- Biosciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA.
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41
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Mailhes JB, Marchetti F. Mechanisms and chemical induction of aneuploidy in rodent germ cells. Cytogenet Genome Res 2005; 111:384-91. [PMID: 16192721 DOI: 10.1159/000086916] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2004] [Accepted: 01/07/2005] [Indexed: 11/19/2022] Open
Abstract
The objective of this review is to suggest that the advances being made in our understanding of the molecular events surrounding chromosome segregation in non-mammalian and somatic cell models be considered when designing experiments for studying aneuploidy in mammalian germ cells. Accurate chromosome segregation requires the temporal control and unique interactions among a vast array of proteins and cellular organelles. Abnormal function and temporal disarray among these, and others to be identified, biochemical reactions and cellular organelles have the potential for predisposing cells to aneuploidy. Although numerous studies have demonstrated that certain chemicals (mainly those that alter microtubule function) can induce aneuploidy in mammalian germ cells, it seems relevant to point out that such data can be influenced by gender, meiotic stage, and time of cell-fixation post-treatment. Additionally, a consensus has not been reached regarding which of several germ cell aneuploidy assays most accurately reflects the human condition. More recent studies have shown that certain kinase, phosphatase, proteasome, and topoisomerase inhibitors can also induce aneuploidy in rodent germ cells. We suggest that molecular approaches be prudently incorporated into mammalian germ cell aneuploidy research in order to eventually understand the causes and mechanisms of human aneuploidy. Such an enormous undertaking would benefit from collaboration among scientists representing several disciplines.
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Affiliation(s)
- J B Mailhes
- Department of Obstetrics and Gynecology, Louisiana State University Health Sciences Center, Shreveport, LA 71130, USA.
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42
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Aksglaede L, Wikström AM, Rajpert-De Meyts E, Dunkel L, Skakkebaek NE, Juul A. Natural history of seminiferous tubule degeneration in Klinefelter syndrome. Hum Reprod Update 2005; 12:39-48. [PMID: 16172111 DOI: 10.1093/humupd/dmi039] [Citation(s) in RCA: 168] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Klinefelter syndrome (47,XXY) is characterized by small, firm testis, gynaecomastia, azoospermia and hypergonadotropic hypogonadism. Degeneration of the seminiferous tubules in 47,XXY males is a well-described phenomenon. It begins in the fetus, progresses through infancy and accelerates dramatically at the time of puberty with complete hyalinization of the seminiferous tubules, although a few tubules with spermatogenesis may be present in adult life. Activation of the pituitary-gonadal axis at 3 months of age is seen in Klinefelter boys similar to healthy boys. However, the level of testosterone in Klinefelter boys is significantly lower than in controls. After this 'minipuberty', the hormone levels decline to normal prepubertal levels until puberty. In puberty, an initial rise in testosterone, inhibin B, LH and FSH occurs in Klinefelter boys. However, the rise in testosterone levels off and ends at a low-normal level in young adults. Likewise, serum concentration of inhibin B exhibits a dramatic decline to a low, often undetectable level, concomitantly with a rise in FSH, reflecting the degeneration of the seminiferous tubules. Many hypotheses about the underlying mechanism of the depletion of the germ cells in Klinefelter males have been reported and include insufficient supranumerary X-chromosome inactivation, Leydig cell insufficiency and disturbed regulation of apoptosis of Sertoli and Leydig cells. However, at present, the exact mechanism remains unclear. In this article, we summarize current knowledge on the development of the classical endocrinological and histological features of 47,XXY males from fetus to adulthood and review the literature concerning the degeneration of the seminiferous tubules in this syndrome.
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Affiliation(s)
- Lise Aksglaede
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
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43
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Wang S, Zheng H, Esaki Y, Kelly F, Yan W. Cullin3 is a KLHL10-interacting protein preferentially expressed during late spermiogenesis. Biol Reprod 2005; 74:102-8. [PMID: 16162871 DOI: 10.1095/biolreprod.105.045484] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Kelch-like 10 (KLHL10) is a member of the BTB (Bric-a-brac, Tramtrack, and Broad-Complex)-kelch protein superfamily essential for spermiogenesis and male fertility. In a search for KLHL10-interacting proteins using a yeast two-hybrid assay, we identified Cullin3 (CUL3) as one of multiple KLHL10-interacting partners. Yeast cotransformation assays revealed that CUL3 bound the BTB/POZ domain of KLHL10. Northern blot and quantitative RT-PCR analyses demonstrated that Cul3 mRNA was preferentially expressed in the testis. In situ hybridization analysis localized Cul3 mRNA to spermatids in the adult testis. CUL3 protein was detected in elongating and elongated spermatids (steps 10-16) by immunofluorescent microscopy. The expression pattern of CUL3 resembles KLHL10. CUL3 was coimmunoprecipated with KLHL10, and KLHL10 was also detected in the CUL3 immunoprecipitants using testis lysates. These findings suggest that KLHL10, like other BTB/kelch proteins, interacts with CUL3 to form a CUL3-based ubiquitin E3 ligase that functions specifically in the testis to mediate protein ubiquitination during spermiogenesis.
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Affiliation(s)
- Shouhua Wang
- Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, NV 89557, USA
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44
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Nayernia K, Drabent B, Meinhardt A, Adham IM, Schwandt I, Müller C, Sancken U, Kleene KC, Engel W. Triple knockouts reveal gene interactions affecting fertility of male mice. Mol Reprod Dev 2005; 70:406-16. [PMID: 15685642 DOI: 10.1002/mrd.20227] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Triple knockout mice were used to investigate the interactions of five genes that were expressed in meiotic and haploid spermatogenic cells in mice, transition protein 2 (Tnp2), proacrosin (Acr), histone H1.1 (H1.1), histone H1t (H1t), and sperm mitochondria-associated cysteine-rich protein (Smcp). TNP2 functions in the replacement of histones and the initial condensation of the spermatid nucleus. The linker histone subtypes H1.1 and H1t are expressed at high levels in meiotic and early haploid cells. ACR, a protease that is stored as a proenzyme in the acrosome, is activated during the acrosome reaction and functions in binding of sperm to the zona pellucida. SMCP is a structural protein in the outer membranes of sperm mitochondria that functions in motility. Previous work demonstrates that homozygous knockout mice lacking each of these proteins individually exhibit no defect in fertility on mixed genetic backgrounds. In contrast, the present study demonstrates that five triple knockout lines, Acr/H1.1/Smcp, Acr/Tnp2/Smcp, Tnp2/H1.1/Smcp, Acr/H1t/Smcp, Tnp2/H1t/Smcp, exhibit drastic reductions in fertility on mixed genetic backgrounds. Analysis of fertility parameters reveal that the decreased fertility is due to line-dependent defects in sperm motility in vitro correlated with reduced migration in the female reproductive tract, and decreased fertilization due to defects in adhesion of sperm to the zona pellucida, the membrane surrounding the egg. It was also found that triple knockout males, that are hemizygous for one locus and homozygous for two other loci, are as subfertile as homozygous triple knockout males, a phenomenon known as haploinsufficiency. These findings demonstrate that male fertility involves synergistic interactions of genes that function in sperm motility and sperm-egg adhesion during fertilization.
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Affiliation(s)
- Karim Nayernia
- Institute of Human Genetics, University of Göttingen, Göttingen, Germany.
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45
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Abstract
The present review is a summary of mechanisms of spermatogenesis in primates with emphasis on anti-spermatogenesis of testosterone (T), gossypol, and "testicular heat stress" for development of male contraception, Both FSH and testosterone stimulate all phases of spermatogenesis. FSH is capable of amplifying the population of the differential spermatogonia (B1, B2, B3 and B4) and controls the spermatogonia production rate, and, in synergy with testosterone, regulating spermatogenesis in adult monkeys. Pituitary FSH beta gene expression is governed by a feedback of Beta inhibin, which is a major component of the testicular negative feedback signals. Beta inhibin secreted by Sertoli cells is in turn inhibited by testosterone from Leydig cells under the control of LH. Disturbance of the normal interaction of pituitary FSH with Sertoli cell Beta inhibin is responsible for azoospermia or oligozoospermia induced by exogenous T. Three possible regimens of T, gossypol and "heat stress" have been suggested for male contraception. They act on different sites and stages of spermatogenesis in testis or sperm activity in epididymis. Apoptosis induced by testosterone occurs mainly at staged VII-VIII of spermatogenesis while that by testicular "heat stress" mostly occurs at stages I-IV and X-XII. Low dose of gossypol mainly influences the sperm activity in the epididymis although it also acts on testicular spermatids.
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Affiliation(s)
- Yi-Xun Liu
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China.
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46
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Diederichs S, Bäumer N, Schultz N, Hamra FK, Schrader MG, Sandstede ML, Berdel WE, Serve H, Müller-Tidow C. Expression patterns of mitotic and meiotic cell cycle regulators in testicular cancer and development. Int J Cancer 2005; 116:207-17. [PMID: 15800920 DOI: 10.1002/ijc.21034] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Mitotic and meiotic cell cycle regulation is essential for normal development and tumor prevention. The underlying molecular mechanisms are not completely characterized. The aim of our analysis was to derive a global expression map of cell cycle regulators in mitosis and meiosis. First, the expression of cyclins, CDKs and CDK inhibitors was determined during postnatal testis maturation in mice using microarrays and quantitative RT-PCR. The abundance of cyclins A1, B2, K, M4, CDK2, all CDKLs, CDKN2c, CDKN2d and INCA1 increased during testis maturation. In contrast, cyclins A2, B1, D2, G1, G2, CDK1, CDK4 and CDK2AP1 showed a maturation-associated decrease. Gene expression profiles of isolated germ cells and testicular somatic cells confirmed these results. Second, we determined cyclin expression patterns in human normal and malignant testis samples (n = 36) modeling the reciprocal difference between meiosis and mitosis. Testicular tumors strictly expressed cell cycle regulators identified in mitotically dividing germ cells. Expression of several transcripts was histology-specific in testicular tumors, providing novel molecular markers and potential therapeutic targets. Taken together, our data provide a comprehensive expression map of cell cycle regulators at the switch between mitosis and meiosis in testis development and in cancerogenesis.
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Affiliation(s)
- Sven Diederichs
- Department of Medicine, Hematology/Oncology, University of Münster, Münster, Germany
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47
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Gomes C, Oh SD, Kim JW, Chun SY, Lee K, Kwon HB, Soh J. Expression of the putative sterol binding protein Stard6 gene is male germ cell specific. Biol Reprod 2004; 72:651-8. [PMID: 15564601 DOI: 10.1095/biolreprod.104.032672] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Mammalian spermatogenesis is orchestrated by many specific molecular and cellular events. To understand the detailed mechanism by which spermatogenesis is controlled, the specific genes involved in this process must be identified and studied. From the subtracted cDNA library of rat testis prepared using the representational difference analysis (RDA) method, we isolated the cDNA clone of steroidogenic acute regulatory (StAR) protein-related lipid transfer (START) protein 6 (Stard6). Stard6 cDNA consists of 1146 base pairs of nucleotides and has the longest open reading frame, of 227 amino acids. Northern blot analysis revealed Stard6 mRNA to be testis-specific. The mRNA transcript appeared from the third week of postnatal development, and the expression level increased up to adulthood. Moreover, in situ hybridization showed Stard6 mRNA expression to be germ cell-specific and expressed only during the maturation stages of round and elongated spermatids of adult rat testis. Western blot analysis with Stard6 antibody revealed a 28-kDa Stard6 protein only in testis. Immunohistochemistry further confirmed localization of Stard6 protein expressed in mature germ cells, in concert with the in situ hybridization result. Taken together, these results suggest that Stard6, a member of the START protein family, may play a role during germ cell maturation in adult rat testis.
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Affiliation(s)
- Cynthia Gomes
- Hormone Research Center, Department of Molecular Endocrinology, School of Biological Sciences and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea
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48
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Berthet C, Morera AM, Asensio MJ, Chauvin MA, Morel AP, Dijoud F, Magaud JP, Durand P, Rouault JP. CCR4-associated factor CAF1 is an essential factor for spermatogenesis. Mol Cell Biol 2004; 24:5808-20. [PMID: 15199137 PMCID: PMC480892 DOI: 10.1128/mcb.24.13.5808-5820.2004] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The CCR4-associated protein CAF1 has been demonstrated to play several roles in the control of transcription and of mRNA decay. To gain further insight into its physiological function, we generated CAF1-deficient mice. They are viable, healthy, and normal in appearance; however, mCAF1(-/-) male mice are sterile. The crossing of mCAF1(+/-) mice gave a Mendelian ratio of mCAF1(+/+), mCAF1(+/-), and mCAF1(-/-) pups, indicating that haploid mCAF1-deficient germ cells differentiate normally. The onset of the defect occurs during the first wave of spermatogenesis at 19 to 20 days after birth, during progression of pachytene spermatocytes to haploid spermatids and spermatozoa. Early disruption of spermatogenesis was evidenced by Sertoli cell vacuolization and tubular disorganization. The most mature germ cells were the most severely depleted, but progressively all germ cells were affected, giving Sertoli cell-only tubes, large interstitial spaces, and small testes. This phenotype could be linked to a defect(s) in germ cells and/or to inadequate Sertoli cell function, leading to seminiferous tubule disorganization and finally to a total disappearance of germ cells. The mCAF1-deficient mouse provides a new model of failed spermatogenesis in the adult that may be relevant to some cases of human male sterility.
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49
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Maratou K, Forster T, Costa Y, Taggart M, Speed RM, Ireland J, Teague P, Roy D, Cooke HJ. Expression profiling of the developing testis in wild-type and Dazl knockout mice. Mol Reprod Dev 2004; 67:26-54. [PMID: 14648873 DOI: 10.1002/mrd.20010] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Genetic understanding of male-factor infertility requires knowledge of gene expression patterns associated with normal germ cell differentiation. The mouse is one of the best models of mammalian fertility due to its well-characterized genetics and the existence of many infertile mutants both naturally occurring and experimentally induced. We used cDNA microarrays firstly to investigate normal gene expression in the wild-type (wt) testis and secondly to gain a better insight into the effect of the disruption of the Dazl gene on spermatogenesis. We constructed a cDNA microarray from a subtracted and normalized adult testis library and focused on six developmental time-points during the initial synchronous wave of spermatogenesis. The results suggest that in the wild-type testis, 89.5% of genes on our chip change expression dramatically during the time-course. To identify patterns in the gene-expression data, a k-means clustering algorithm and principal component analysis were used. In the Dazl knockout testes, the majority of genes remain at baseline levels of expression, because absence of Dazl has a severe effect on cell-types present in the testis. Although in the prepubescent Dazl-null mice the final point reached in germ cell development is the leptotene-zygotene stage, the microarray results suggest that lack of Dazl expression has a detectable effect on the mRNA complement of germ cells as early as day 5 when only type A spermatogonia are present. Mol. Reprod. Dev. 67: 26-54, 2004.
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Affiliation(s)
- Klio Maratou
- MRC Human Genetics Unit, Edinburgh, United Kingdom
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50
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Andrade-Rocha FT. Semen analysis in laboratory practice: an overview of routine tests. J Clin Lab Anal 2004; 17:247-58. [PMID: 14614749 PMCID: PMC6807815 DOI: 10.1002/jcla.10105] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Semen analysis is a basic step in the investigation of several disturbances affecting the male genital tract. Analysis of seminal parameters provides important clinical information on the spermatogenesis and functional competence of spermatozoa, as well as on the secretory pattern of the accessory genital glands. Semen analysis is particularly useful in the evaluation of couples requiring fertility investigation (to detect genital infections and pathologies) and in verifying the influence of environmental factors, drugs, lifestyle, chemical products, and professional activities on several diseases affecting male reproductive health. Measure of semen quality is of substantial interest for diagnoses in clinical urology, andrology, and gynecology. Currently, basic requirements for semen analysis are standardized by World Health Organization (WHO) guidelines that describe several procedures for an objective evaluation of the semen quality with diagnostic purposes. These guidelines include: parameters for the physical and biochemical evaluation of semen; parameters for the analysis of sperm characteristics; and other seminal parameters that can be easily adopted in any laboratory. This report summarizes current concepts on semen analysis and the significance of the seminal parameters for reaching a diagnosis based on the procedures recommended by WHO guidelines.
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