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Chen X, Ding J, Liu M, Xing K, Ye P, Min J, Zhang Y, Yin T. A Systemic Review and Meta-analysis of the Effect of SARS-CoV-2 Infection on Sperm Parameters. Research (Wash D C) 2022. [DOI: 10.34133/2022/9835731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Objective. Several studies examined the putative effects of SARS-CoV-2 infection on sperm parameters. However, the results remain controversial. In this study, we conducted the most up-to-date systematic review and meta-analysis to investigate the effect of SARS-CoV-2 infection on sperm quality in COVID-19-positive and COVID-19-negative male participants. Method. Seven databases were searched for literature released through June 10, 2022, containing estimates for the outcomes of interest. Using a random-effects model (REM) or a fixed-effects model (FEM), we analyzed the pooled results. The quality of all included studies was assessed by the Newcastle-Ottawa scale. In addition, we performed a quantitative and subgroup analysis of semen data across all included studies. Results. Fourteen studies were extracted from 10 publications, involving a total of 1174 participates for meta-analysis. Sperm parameters of 521 COVID-19 male patients and 653 controls were analyzed. In 8 case-control studies, the pooled mean difference (MD) of total sperm motility was -5.37% (95% confidence interval (CI): -8.47 to -2.28; p<0.05), suggesting that total motility was significantly impaired in male COVID-19 cases. Subgroup analysis showed a significant decrease in semen volume, sperm concentration, and total motility in 238 patients with a recovery time of less than 90 days. Moreover, in the other 6 included pre- to post-COVID-19 studies, the pooled MDs of sperm concentration, total sperm count, total motility, progressive motility, and normal morphology were −6.54×106/ml (95% CI: -10.27 to -2.81; p<0.05), −38.89×106 (95% CI: -59.20 to -18.58; p<0.05), -7.21% (95% CI: -14.36 to -0.07; p<0.05), -5.12% (95% CI: -8.71 to -1.53; p<0.05), and -1.52% (95% CI: -2.88 to -0.16; p<0.05), respectively, which indicate SARS-CoV-2 infection significantly affected these five sperm parameters. Conclusion. Our results revealed that SARS-CoV-2 infection was significantly correlated with decreased sperm quality. Of six sperm parameters, total motility and sperm concentration were the most significantly decreased parameters. These results suggest a possible negative influence of SARS-CoV-2 infection on testicular function and male fertility. Given the potential detrimental effect of SARS-CoV-2 on semen quality, male reproductive health should be monitored closely in patients with COVID-19. This trial is registered with CRD42021275823.
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Affiliation(s)
- Xi Chen
- Reproductive Medical Centre, Renmin Hospital of Wuhan University, Wuhan, China
| | - Jinli Ding
- Reproductive Medical Centre, Renmin Hospital of Wuhan University, Wuhan, China
| | - Miao Liu
- Department of Pediatrics, Renmin Hospital of Wuhan University, Wuhan, China
| | - Kai Xing
- Department of Cardiovascular Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Peng Ye
- Department of Pharmacy, Renmin Hospital of Wuhan University, Wuhan, China
| | - Junxia Min
- The First Affiliated Hospital, Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
| | - Yan Zhang
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, China
| | - Tailang Yin
- Reproductive Medical Centre, Renmin Hospital of Wuhan University, Wuhan, China
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2
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ACE2 Receptor and Its Isoform Short-ACE2 Are Expressed on Human Spermatozoa. Int J Mol Sci 2022; 23:ijms23073694. [PMID: 35409054 PMCID: PMC8998905 DOI: 10.3390/ijms23073694] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/18/2022] [Accepted: 03/25/2022] [Indexed: 02/07/2023] Open
Abstract
Angiotensin-converting enzyme 2 (ACE2) is a protein widely expressed in numerous cell types, with different biological roles mainly related to the renin-angiotensin system. Recently, ACE2 has been in the spotlight due to its involvement in the SARS-CoV-2 entry into cells. There are no data available regarding the expression of ACE2 and its short-ACE2 isoform at the protein level on human spermatozoa. Here, protein expression was demonstrated by western blot and the percentage of sperm displaying surface ACE2 was assessed by flow cytometry. Immunocytochemistry assays showed that full-length ACE2 was mainly expressed in sperm midpiece, while short ACE2 was preferentially distributed on the equatorial and post-acrosomal region of the sperm head. To our knowledge, this is the first study demonstrating the expression of protein ACE2 on spermatozoa. Further studies are warranted to determine the role of ACE2 isoforms in male reproduction.
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Verrienti P, Cito G, Di Maida F, Tellini R, Cocci A, Minervini A, Natali A. The impact of COVID-19 on the male genital tract: A qualitative literature review of sexual transmission and fertility implications. Clin Exp Reprod Med 2022; 49:9-15. [PMID: 35255654 PMCID: PMC8923629 DOI: 10.5653/cerm.2021.04511] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 12/27/2021] [Indexed: 12/15/2022] Open
Abstract
The angiotensin-converting enzyme 2 receptor (ACE2) appears to be widely expressed in cells in the testes, predominantly in spermatogonia, Sertoli cells, and Leydig cells, and its co-expression with transmembrane protease serine 2 (TMPRSS2) is essential for the entry of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). For this reason, the male reproductive system could be considered a potential target for SARS-CoV-2, as well as a possible reservoir of infection. However, to date, there is very little evidence about the presence of SARS-CoV-2 in semen and testicular samples. The aim of this paper was to review the current evidence regarding the impact of SARS-CoV-2 on male fertility and sexual health, with a particular focus on reproductive hormones, the presence of the virus in seminal fluid and testis, and its impact on fertility parameters. We found very limited evidence reporting the presence of SARS-CoV-2 in semen and testicular samples, and the impact of SARS-CoV-2 on reproductive hormones and fertility parameters is unclear. The quality of the examined studies was poor due to the small sample size and several selection biases, precluding definitive conclusions. Hence, future well-designed prospective studies are needed to assess the real impact of SARS-CoV-2 on male reproductive function.
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Affiliation(s)
- Pierangelo Verrienti
- Department of Urology, Careggi Hospital, University of Florence, Florence, Italy
- Corresponding author: Pierangelo Verrienti Department of Urology, Careggi Hospital, University of Florence, Largo Brambilla, 3 50134 Florence, Italy Tel: +39-0557949203 E-mail:
| | - Gianmartin Cito
- Department of Urology, Careggi Hospital, University of Florence, Florence, Italy
| | - Fabrizio Di Maida
- Department of Urology, Careggi Hospital, University of Florence, Florence, Italy
| | - Riccardo Tellini
- Department of Urology, Careggi Hospital, University of Florence, Florence, Italy
| | - Andrea Cocci
- Department of Urology, Careggi Hospital, University of Florence, Florence, Italy
| | - Andrea Minervini
- Department of Urology, Careggi Hospital, University of Florence, Florence, Italy
| | - Alessandro Natali
- Department of Urology, Careggi Hospital, University of Florence, Florence, Italy
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4
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Jia B, Larbi A, Lv C, Liang J, Xiang D, Zhang B, Fang Y, Shen W, Wu G, Quan G. Identification and validation of ram sperm proteins associated with cryoinjuries caused by the cryopreservation process. Theriogenology 2022; 184:191-203. [DOI: 10.1016/j.theriogenology.2022.03.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 02/23/2022] [Accepted: 03/14/2022] [Indexed: 12/15/2022]
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Zhao F, Zou Y, Li H, Zhang Y, Liu X, Zhao X, Wu X, Fei W, Xu Z, Yang X. Decreased angiotensin receptor 1 expression in ± AT1 Knockout mice testis results in male infertility and GnRH reduction. Reprod Biol Endocrinol 2021; 19:120. [PMID: 34344365 PMCID: PMC8330126 DOI: 10.1186/s12958-021-00805-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 07/20/2021] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND This study aimed to detect the effect of angiotensin receptor 1 (AT1) knock out (KO) on spermatogenesis and hypothalamic-pituitary-gonadal (HPG) axis hormone expression. METHODS Normal C57BL/6 male mice were used as control group or treated with angiotensin receptor blocker, in addition heterozygous ± AT1KO mice were generated. After caged at a ratio of 2 to 1 with females, pregnancy rates of female mice were determined by detection of vaginal plugs. Deformity rate of spermatozoa was evaluated by eosin staining and morphology evaluation. The AT1 mRNA expression in the testes of male ± AT1KO mice was detected by quantitative real-time polymerase chain reaction (QRT-PCR). Serum GnRH level was determined by ELISA. RESULTS Compared to control, ± AT1KO mice showed reduced expression of AT1 in testes, pituitary and hypothalamus. In addition, decreased level of GnRH, but not follicle stimulating hormone (FSH) or luteinizing hormone (LH), in ± AT1KO mice was detected. Treatment with angiotensin receptor blocker (ARB) did not have significant effects on HPG hormones. ± AT1KO mice exhibited male infertility and significant abnormality of sperm morphology. CONCLUSION Reduced AT1 knockout resulted in male infertility, potentially by inducing abnormal spermatogenesis. Both testis and HPG axis signaling may be involved.
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Affiliation(s)
- Fangfang Zhao
- Institute of Nephrology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Road, Pudong New Area, Shanghai, China
- Institute of Nephrology, Guangming Traditional Chinese Medicine Hospital, 339 East gate Street, Pudong New Area, Shanghai, China
| | - Yun Zou
- Institute of Nephrology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Road, Pudong New Area, Shanghai, China
| | - Hui Li
- Institute of Nephrology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Road, Pudong New Area, Shanghai, China
| | - Yaheng Zhang
- Institute of Nephrology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Road, Pudong New Area, Shanghai, China
| | - Xuele Liu
- Institute of Nephrology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Road, Pudong New Area, Shanghai, China
| | - Xuehao Zhao
- Institute of Nephrology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Road, Pudong New Area, Shanghai, China
| | - Xinyi Wu
- Institute of Nephrology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Road, Pudong New Area, Shanghai, China
| | - Wenyi Fei
- Institute of Nephrology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Road, Pudong New Area, Shanghai, China
| | - Ziling Xu
- Institute of Nephrology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Road, Pudong New Area, Shanghai, China
| | - Xuejun Yang
- Institute of Nephrology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Road, Pudong New Area, Shanghai, China.
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Moshrefi M, Ghasemi-Esmailabad S, Ali J, Findikli N, Mangoli E, Khalili MA. The probable destructive mechanisms behind COVID-19 on male reproduction system and fertility. J Assist Reprod Genet 2021; 38:1691-1708. [PMID: 33977466 PMCID: PMC8112744 DOI: 10.1007/s10815-021-02097-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/28/2021] [Indexed: 01/08/2023] Open
Abstract
PURPOSE The present study aims to summarize the current understanding of probable mechanisms and claims of adverse effects of SARS-CoV-2 on male fertility potential. METHODS Our search was including original articles, reviews, guidelines, letters to the editor, comments on guidelines, and editorials, regarding the male reproductive system. We used the words SARS-CoV-2, coronavirus, severe acute respiratory syndrome coronavirus 2, "2019 ncov," testis, sperm, male factor infertility, fertility treatment, semen, assisted reproductive technology (ART), sexual transmission, and ACE2. RESULTS Data showed coronavirus affects men more than women because of more expression of 2019 nCoV receptors (ACE2 and TMPRSS2) in testicular cells. Also, "Bioinformatics Analysis" suggests that sperm production may be damaged, since "Pseudo Time Analysis" has shown disruption in spermatogenesis. "Gene Ontology" (GO) showed an increase in viral reproduction and a decrease in sperm production-related terms. Recently, SARS-COV-2 mRNA and protein were detected in the semen of patients that had recovered from SARS-CoV-2 infection. Therefore, the probable disruption of blood-testis barrier (BTB) in febrile diseases is suspected in the acute phase of the disease enabling viral entry into the testes. Not only is spermatogenesis disturbed, but also disturbs gonadotropin, androgens, and testosterone secretion during SARS-CoV-2 infection. No sexual transmission has been reported yet; however, detection of the virus in semen still makes the sexual transmission an open question. CONCLUSION There is a concern that male fertility may be disturbed after the SARS-CoV-2 infection. Therefore, follow-up of the reproductive functions and male fertility may be necessary in recovered cases, especially in aged men.
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Affiliation(s)
- Mojgan Moshrefi
- Research and Clinical Center for Infertility, Yazd Reproductive Science Institute, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
- Department of Reproductive Biology, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
- Medical Nanotechnology & Tissue Engineering Research Center, Yazd Reproductive Science Institute, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | | | - Jaffar Ali
- Synbios Media, www.synbiosmedia.com, P.O. Box 02042, GPO, Shah Alam, Selangor Malaysia
| | - Necati Findikli
- Bahceci Fulya Assisted Reproduction Center, Istanbul, Turkey
- Department of Bioengineering, Beykent University, Istanbul, Turkey
| | - Esmat Mangoli
- Research and Clinical Center for Infertility, Yazd Reproductive Science Institute, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
- Department of Reproductive Biology, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Mohammad Ali Khalili
- Research and Clinical Center for Infertility, Yazd Reproductive Science Institute, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
- Department of Reproductive Biology, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
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7
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He Y, Wang J, Ren J, Zhao Y, Chen J, Chen X. Effect of COVID-19 on Male Reproductive System - A Systematic Review. Front Endocrinol (Lausanne) 2021; 12:677701. [PMID: 34122351 PMCID: PMC8190708 DOI: 10.3389/fendo.2021.677701] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 04/27/2021] [Indexed: 12/30/2022] Open
Abstract
Background Angiotensin-converting enzyme II (ACE2), a receptor for Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) to enter host cells, is widely expressed in testes and prostate tissues. The testis and prostate produce semen. At present, there are contradictory reports about whether SARS-CoV-2 can exist in the semen of infected men. Objective To provide a comprehensive overview of the topic of whether COVID-19 can impact on male reproductive system. Methods We reviewed the relevant publications on the possible impact of Coronavirus Disease 2019 (COVID-19) on male reproductive system and summarized the latest and most important research results so far. Literature published in English from December 2019 to January 31, 2021 regarding the existence of SARS-CoV-2 in semen, testis, and prostatic fluid and the effects of COVID-19 on male reproductive were included. Results We identified 28 related studies, only one of which reported the presence of SARS-CoV-2 in semen. The study found that the semen quality of patients with moderate infection was lower than that of patients with mild infection and healthy controls. The impaired semen quality may be related to fever and inflammation. Pathological analysis of the testis/epididymis showed that SARS-CoV-2 viral particles were positive in 10 testicular samples, and the spermatogenic function of the testis was impaired. All 94 expressed prostatic secretion (EPS) samples were negative for SARS-CoV-2 RNA. Conclusion The likelihood of SARS-CoV-2 in the semen of COVID-19 patients is very small, and semen should rarely be regarded as a carrier of SARS-CoV-2 genetic material. However, COVID-19 may cause testicular spermatogenic dysfunction via immune or inflammatory reactions. Long-term follow-up is needed for COVID-19 male patients and fetuses conceived during the father's infection period.
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Affiliation(s)
- Yanfei He
- Health Management Center, The Sixth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Jie Wang
- Health Management Center, The Sixth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Junlin Ren
- Department of Infection Control, The Sixth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Yubo Zhao
- Department of Urology, The Sixth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Jing Chen
- Cadre Clinic of the Sixth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Xuejiao Chen
- Scientific Research and Training Office, The Sixth Medical Center, Chinese PLA General Hospital, Beijing, China
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8
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Madjunkov M, Dviri M, Librach C. A comprehensive review of the impact of COVID-19 on human reproductive biology, assisted reproduction care and pregnancy: a Canadian perspective. J Ovarian Res 2020; 13:140. [PMID: 33246480 PMCID: PMC7694590 DOI: 10.1186/s13048-020-00737-1] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 11/06/2020] [Indexed: 12/13/2022] Open
Abstract
Currently, the world is in the seventh month of the COVID-19 pandemic. Globally, infections with novel SARS-CoV-2 virus are continuously rising with mounting numbers of deaths. International and local public health responses, almost in synchrony, imposed restrictions to minimize spread of the virus, overload of health system capacity, and deficit of personal protective equipment (PPE). Although in most cases the symptoms are mild or absent, SARS-CoV-2 infection can lead to serious acute respiratory disease and multisystem failure. The research community responded to this new disease with a high level of transparency and data sharing; with the aim to better understand the origin, pathophysiology, epidemiology and clinical manifestations. The ultimate goal of this research is to develop vaccines for prevention, mitigation strategies, as well as potential therapeutics.The aim of this review is to summarize current knowledge regarding the novel SARS CoV-2, including its pathophysiology and epidemiology, as well as, what is known about the potential impact of COVID-19 on reproduction, fertility care, pregnancy and neonatal outcome. This summary also evaluates the effects of this pandemic on reproductive care and research, from Canadian perspective, and discusses future implications.In summary, reported data on pregnant women is limited, suggesting that COVID-19 symptoms and severity of the disease during pregnancy are similar to those in non-pregnant women, with pregnancy outcomes closely related to severity of maternal disease. Evidence of SARS-CoV-2 effects on gametes is limited. Human reproduction societies have issued guidelines for practice during COVID-19 pandemic that include implementation of mitigation practices and infection control protocols in fertility care units. In Canada, imposed restrictions at the beginning of the pandemic were successful in containing spread of the infection, allowing for eventual resumption of assisted reproductive treatments under new guidelines for practice. Canada dedicated funds to support COVID-19 research including a surveillance study to monitor outcomes of COVID-19 during pregnancy and assisted reproduction. Continuous evaluation of new evidence must be in place to carefully adjust recommendations on patient management during assisted reproductive technologies (ART) and in pregnancy.
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Affiliation(s)
- Mitko Madjunkov
- CReATe Fertility Centre, 790 Bay Street, Suite 1100, Toronto, M5G1N8, Canada.
- Department of Obstetrics and Gynecology, University of Toronto, Toronto, Canada.
| | - Michal Dviri
- CReATe Fertility Centre, 790 Bay Street, Suite 1100, Toronto, M5G1N8, Canada
- Department of Obstetrics and Gynecology, University of Toronto, Toronto, Canada
| | - Clifford Librach
- CReATe Fertility Centre, 790 Bay Street, Suite 1100, Toronto, M5G1N8, Canada.
- Department of Obstetrics and Gynecology, University of Toronto, Toronto, Canada.
- Institute of Medical Sciences, University of Toronto, Toronto, Canada.
- Department of Physiology, University of Toronto, Toronto, Canada.
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9
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He W, Liu X, Feng L, Xiong S, Li Y, Chen L, Li Y, Wang G, Li D, Fu B. Impact of SARS-CoV-2 on Male Reproductive Health: A Review of the Literature on Male Reproductive Involvement in COVID-19. Front Med (Lausanne) 2020; 7:594364. [PMID: 33330557 PMCID: PMC7711165 DOI: 10.3389/fmed.2020.594364] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 10/23/2020] [Indexed: 01/08/2023] Open
Abstract
Coronavirus Disease 2019 (COVID-19) has created a global pandemic. Global epidemiological results show that elderly men are susceptible to infection of COVID-19. The difference in the number of cases reported by gender increases progressively in favor of male subjects up to the age group ≥60-69 (66.6%) and ≥70-79 (66.1%). Through literature search and analysis, we also found that men are more susceptible to SARS-CoV-2 infection than women. In addition, men with COVID-19 have a higher mortality rate than women. Male represents 73% of deaths in China, 59% in South Korea, and 61.8% in the United States. Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) is the pathogen of COVID-19, which is transmitted through respiratory droplets, direct and indirect contact. Genomic analysis has shown that SARS-CoV-2 is 79% identical to SARS-CoV, and both use angiotensin-converting enzyme 2 (ACE2) as the receptor for invading cells. In addition, Transmembrane serine protease 2 (TMPRSS2) can enhance ACE2-mediated virus entry. However, SARS-CoV-2 has a high affinity with human ACE2, and its consequences are more serious than other coronaviruses. ACE2 acts as a "gate" for viruses to invade cells and is closely related to the clinical manifestations of COVID-19. Studies have found that ACE2 and TMPRSS2 are expressed in the testis and male reproductive tract and are regulated by testosterone. Mature spermatozoon even has all the machinery required to bind SARS-CoV-2, and these considerations raise the possibility that spermatozoa could act as potential vectors of this highly infectious disease. This review summarizes the gender differences in the pathogenesis and clinical manifestations of COVID-19 and proposes the possible mechanism of orchitis caused by SARS-CoV-2 and the potential transmission route of the virus. In the context of the pandemic, these data will improve the understanding of the poor clinical outcomes in male patients with COVID-19 and the design of new strategies to prevent and treat SARS-CoV-2 infection.
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Affiliation(s)
- Weihang He
- Reproductive Medicine Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Xiaoqiang Liu
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang, China
- Jiangxi Institute of Urology, Nanchang, China
| | - Liang Feng
- Reproductive Medicine Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Situ Xiong
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yulei Li
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Luyao Chen
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yu Li
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Gongxian Wang
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang, China
- Jiangxi Institute of Urology, Nanchang, China
| | - Dongshui Li
- Reproductive Medicine Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Bin Fu
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang, China
- Jiangxi Institute of Urology, Nanchang, China
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10
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Aitken RJ. COVID-19 and human spermatozoa-Potential risks for infertility and sexual transmission? Andrology 2020; 9:48-52. [PMID: 32649023 PMCID: PMC7404878 DOI: 10.1111/andr.12859] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 06/29/2020] [Accepted: 07/01/2020] [Indexed: 12/21/2022]
Abstract
As COVID‐19 infections wreak havoc across the globe, attention has rightly been focused on the vital organ systems (lung, kidney and heart) that are vulnerable to viral attack and contribute to the acute pathology associated with this disease. However, we should not lose sight of the fact that COVID‐19 will attack any cell type in the body expressing ACE2 ‐ including human spermatozoa. These cells possess the entire repertoire of receptors (AT1R, AT2R, MAS) and ligand processing enzymes (ACE1 and ACE2) needed to support the angiotensin signalling cascade. The latter not only provides COVID‐19 with a foothold on the sperm surface but may also promote integration, given the additional presence of a range of proteases (TMPRSS2, TMPRSS11B, TMPRSS12, furin) capable of promoting viral fusion. This article reviews the roles played by these various cellular constituents in maintaining the vitality of human spermatozoa and their competence for fertilization. The reproductive consequences of a viral attack on these systems, in terms of fertility and the risk of sexual transmission, are currently unknown. However, we should be alive to the possibility that there may be reproductive consequences of COVID‐19 infection in young males that go beyond their capacity to survive a viral attack.
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Affiliation(s)
- Robert John Aitken
- Priority Research Centre for Reproductive Science, Faculty of Science and Faculty of Health and Medicine, University of Newcastle, Callaghan, NSW, Australia
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Anifandis G, Messini CI, Daponte A, Messinis IE. COVID-19 and fertility: a virtual reality. Reprod Biomed Online 2020; 41:157-159. [PMID: 32466995 PMCID: PMC7206439 DOI: 10.1016/j.rbmo.2020.05.001] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 04/22/2020] [Accepted: 05/01/2020] [Indexed: 02/07/2023]
Abstract
The COVID-19 pandemic is an extraordinary global situation, and all countries have adopted their own strategies to diminish and eliminate the spread of the virus. All measures are in line with the recommendations provided by the World Health Organization. Scientific societies, such as the European Society for Human Reproduction and Embryology and American Society for Reproductive Medicine, have provided recommendations and guidance to overcome and flatten the growing curve of infection in patients who undergo IVF treatments. Although there is as yet no evidence that the virus causing COVID-19 might have negative effects on IVF outcomes, fertility treatments have been postponed in order to support healthcare systems by avoiding placing them under additional stress. The possibility of the virus affecting sperm function and egg performance cannot be excluded. In addition, an indirect effect of the virus on gametes and embryos during their manipulation cannot be ruled out. This commentary aims to provide some ideas on the possible effect of the virus on gametes and embryos, as well as how it could affect the normal functioning of the embryology laboratory.
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Affiliation(s)
- George Anifandis
- Department of Obstetrics and Gynaecology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece.
| | - Christina I Messini
- Department of Obstetrics and Gynaecology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Alexandros Daponte
- Department of Obstetrics and Gynaecology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Ioannis E Messinis
- Department of Obstetrics and Gynaecology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
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El-Ariny AF, El-Garem YF, Eid AA, Donia HM, Aly RG, Abdelmeniem IM. Seminal levels of angiotensin II and angiotensin II type 2 receptor expression on spermatozoa in varicocele patients: Relation to fertility status. Andrologia 2020; 52:e13513. [PMID: 31989676 DOI: 10.1111/and.13513] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 11/28/2019] [Accepted: 12/09/2019] [Indexed: 11/28/2022] Open
Abstract
Several theories were proposed to explain the pathophysiology of varicocele-related infertility seen in some patients. Our aim was to study the levels of angiotensin II in semen and angiotensin II type 2 receptor expression on spermatozoa in varicocele patients in relation to their fertility status and to evaluate the influence of varicocelectomy on their levels in infertile varicocele patients. Thirty fertile and 30 infertile varicocele patients and 30 healthy controls were subjected to measurement of reproductive hormones, semen analysis, measurement of seminal angiotensin II and evaluation of angiotensin II type 2 receptor expression on spermatozoa. Infertile varicocele patients underwent varicocelectomy and were re-evaluated for the same parameters after the operation. Sperm concentration, morphology, progressive motility, seminal angiotensin II and angiotensin II type 2 receptor expression were significantly lower in infertile varicocele patients compared with the other groups. Post-operative values showed significant increase in the studied parameters compared with the pre-operative values but not to other two groups. A significant positive correlation between angiotensin II type 2 receptor expression and progressive motility was detected in all studied groups. In conclusion, dysregulation of angiotensin II and angiotensin II type 2 receptor in varicocele patients may be involved in varicocele-related infertility.
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Affiliation(s)
- Ali F El-Ariny
- Faculty of Medicine, Department of Dermatology, Venereology and Andrology, Alexandria University, Alexandria, Egypt
| | - Yehia F El-Garem
- Faculty of Medicine, Department of Dermatology, Venereology and Andrology, Alexandria University, Alexandria, Egypt
| | - Amira Abulfotooh Eid
- Faculty of Medicine, Department of Dermatology, Venereology and Andrology, Alexandria University, Alexandria, Egypt
| | - Hanaa M Donia
- Faculty of Medicine, Department of Clinical and Chemical Pathology, Alexandria University, Alexandria, Egypt
| | - Rania G Aly
- Faculty of Medicine, Department of Pathology, Alexandria University, Alexandria, Egypt
| | - Iman Mohamed Abdelmeniem
- Faculty of Medicine, Department of Dermatology, Venereology and Andrology, Alexandria University, Alexandria, Egypt
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Gianzo M, Urizar-Arenaza I, Muñoa-Hoyos I, Larreategui Z, Garrido N, Casis L, Irazusta J, Subirán N. Human sperm testicular angiotensin-converting enzyme helps determine human embryo quality. Asian J Androl 2019; 20:498-504. [PMID: 29873314 PMCID: PMC6116683 DOI: 10.4103/aja.aja_25_18] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Angiotensin-converting enzyme functions in the male reproductive system, but the extent of its function in reproduction is not fully understood. The primary objective of this work was to investigate the relationship between the testicular isoform of angiotensin-converting enzyme present in human spermatozoa and semen parameters, human embryo quality, and assisted reproduction success. A total of 81 semen samples and 635 embryos from couples undergoing oocyte donation cycles at the IVI Bilbao Clinic were analyzed. Semen parameters, embryos quality, and blastocyst development were examined according to the World Health Organization standards and the Spanish Association of Reproduction Biology Studies criteria. The percentage of testicular angiotensin-converting enzyme-positive spermatozoa and the number of molecules per spermatozoon were analyzed by flow cytometry. Both parameters were inversely correlated with human sperm motility. Higher percentages of testicular angiotensin-converting enzyme-positive spermatozoa together with fewer enzyme molecules per spermatozoon were positively correlated with better embryo quality and development. Our results suggest that embryos with a higher implantation potential come from semen samples with higher percentages of testicular angiotensin-converting enzyme-positive cells and fewer enzyme molecules per spermatozoon. Based on these findings, we propose that testicular angiotensin-converting enzyme could be used to aid embryologists in selecting better semen samples for obtaining high-quality blastocysts during in vitro fertilization procedures.
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Affiliation(s)
- Marta Gianzo
- Department of Physiology, Faculty of Medicine and Nursery, University of the Basque Country (UPV/EHU), Leioa, Biscay 48940, Spain
| | - Itziar Urizar-Arenaza
- Department of Physiology, Faculty of Medicine and Nursery, University of the Basque Country (UPV/EHU), Leioa, Biscay 48940, Spain
| | - Iraia Muñoa-Hoyos
- Department of Physiology, Faculty of Medicine and Nursery, University of the Basque Country (UPV/EHU), Leioa, Biscay 48940, Spain
| | - Zaloa Larreategui
- In Vitro Fertilization Laboratory, IVI Bilbao, Landabarri Promenade 1, Leioa, Biscay 48940, Spain
| | - Nicolás Garrido
- IVI Foundation, IVI Valencia, Local Police Square 3, Valencia 46015, Spain
| | - Luis Casis
- Department of Physiology, Faculty of Medicine and Nursery, University of the Basque Country (UPV/EHU), Leioa, Biscay 48940, Spain
| | - Jon Irazusta
- Department of Physiology, Faculty of Medicine and Nursery, University of the Basque Country (UPV/EHU), Leioa, Biscay 48940, Spain
| | - Nerea Subirán
- Department of Physiology, Faculty of Medicine and Nursery, University of the Basque Country (UPV/EHU), Leioa, Biscay 48940, Spain
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Abstract
Various studies (direct and indirect) have presented the effect of captopril, a universally used antihypertensive medication, on semen quality; yet, this effect is still collectively unreviewed. This review systematically discusses and summarises the effect of captopril on semen quality. We searched all published articles in the MEDLINE electronic database since June 1985 until January 2016 using the keywords "captopril" and "sperm," and certain supporting articles were reviewed and considered, if relevant. In conclusion, up to the present time, captopril does not appear to induce a striking change in semen quality, and hence on male infertility, while it may affect the rate of spermatozoa-egg fusion as it inhibits the activity of angiotensin-converting enzyme that is released during capacitation and the acrosome reaction. Further research, mainly clinical, is still desired to prove these effects.
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Affiliation(s)
- S A Banihani
- Clinical Bio-Analytical Chemistry and Molecular Medicine, Department of Medical Laboratory Sciences, Jordan University of Science and Technology, Irbid, Jordan
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15
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Gianzo M, Muñoa-Hoyos I, Urizar-Arenaza I, Larreategui Z, Quintana F, Garrido N, Subirán N, Irazusta J. Angiotensin II type 2 receptor is expressed in human sperm cells and is involved in sperm motility. Fertil Steril 2016; 105:608-616. [DOI: 10.1016/j.fertnstert.2015.11.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 10/11/2015] [Accepted: 11/02/2015] [Indexed: 02/02/2023]
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16
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Jiang T, Qin Y, Ye T, Wang Y, Pan J, Zhu Y, Duan L, Li K, Teng X. Correlation analysis of the progesterone-induced sperm acrosome reaction rate and the fertilisation rate in vitro. Andrologia 2014; 47:945-50. [PMID: 25310969 DOI: 10.1111/and.12361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/15/2014] [Indexed: 11/30/2022] Open
Abstract
In this study, we aimed to investigate whether progesterone-induced acrosome reaction (AR) rate could be an indicator for fertilisation rate in vitro. Twenty-six couples with unexplained infertility and undergoing in vitro fertilisation (IVF) treatment were involved. On the oocytes retrieval day after routine IVF, residual sperm samples were collected to receive progesterone induction (progesterone group) or not (control group). AR rate was calculated and fertilisation rate was recorded. The correlation between progesterone-induced AR and fertilisation rate and between sperm normal morphology and 3PN (tripronuclear) were analysed using the Spearman correlation analysis. The AR rate of progesterone group was statistically higher than that of the control group (15.6 ± 5.88% versus 9.66 ± 5.771%, P < 0.05), but not significantly correlated with fertilisation rate (r = -0.053, P > 0.01) or rate of high-quality embryo development (r = -0.055, P > 0.01). Normal sperm morphology also showed no significant correlation with the amount of 3PN zygotes (r = 0.029, P > 0.01), rate of 3PN zygotes production (r = 0.20, P > 0.01), rate of 3PN embryo development (r = -0.406, P > 0.01), fertilisation rate (r = -0.148, P > 0.01) or progesterone-induced AR rate (r = 0.214, P > 0.01). Progesterone can induce AR in vitro significantly; however, the progesterone-induced AR may not be used to indicate fertilisation rate.
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Affiliation(s)
- T Jiang
- Center of Reproductive Medicine, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
| | - Y Qin
- Department of Gynaecology and Obstetrics, Ninth People's Hospital of Wuxi City, Wuxi, Jiangsu Province, China
| | - T Ye
- Department of Obstetrics and Gynaecology, University of Hong Kong, Hong Kong, China
| | - Y Wang
- Center of Reproductive Medicine, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
| | - J Pan
- Center of Reproductive Medicine, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
| | - Y Zhu
- Department of Gynaecology, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
| | - L Duan
- Center of Reproductive Medicine, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
| | - K Li
- Center of Reproductive Medicine, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
| | - X Teng
- Center of Reproductive Medicine, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
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17
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Souza CEA, Rego JPA, Lobo CH, Oliveira JTA, Nogueira FC, Domont GB, Fioramonte M, Gozzo FC, Moreno FB, Monteiro-Moreira ACO, Figueiredo JR, Moura AA. Proteomic analysis of the reproductive tract fluids from tropically-adapted Santa Ines rams. J Proteomics 2012; 75:4436-56. [DOI: 10.1016/j.jprot.2012.05.039] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Revised: 05/18/2012] [Accepted: 05/22/2012] [Indexed: 01/13/2023]
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18
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Vedantam S, Atreja SK, Garg M. Angiotensin-II induced nitric oxide production during buffalo sperm capacitation and acrosome reaction. Res Vet Sci 2012; 92:207-12. [DOI: 10.1016/j.rvsc.2011.03.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2010] [Revised: 01/08/2011] [Accepted: 03/18/2011] [Indexed: 11/24/2022]
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Zalata AA, Morsy HK, Badawy AEN, Elhanbly S, Mostafa T. ACE gene insertion/deletion polymorphism seminal associations in infertile men. J Urol 2012; 187:1776-80. [PMID: 22425118 DOI: 10.1016/j.juro.2011.12.076] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2011] [Indexed: 02/08/2023]
Abstract
PURPOSE We assessed seminal associations of the ACE gene insertion/deletion polymorphism in infertile men. MATERIALS AND METHODS A total of 405 men were investigated, divided into healthy fertile men, and those with asthenozoospermia, asthenoteratozoospermia and oligoasthenoteratozoospermia, respectively. They underwent semen analysis, and assessment of sperm acrosin activity, hypo-osmotic swelling, seminal 8-iso-prostaglandin-F(2α), total antioxidant capacity, α-glucosidase and ACE gene polymorphisms. RESULT The ACE insertion/insertion genotype was noted in 182 men, including 76.5% of healthy fertile men, and 47.4%, 39.8% and 17.6% of those with asthenozoospermia, asthenoteratozoospermia and oligoasthenoteratozoospermia, respectively. The ACE insertion/deletion genotype was noted in 133 men, including 13.7% of healthy fertile men, and 42.3%, 27.5% and 47.2% of those with asthenozoospermia, asthenoteratozoospermia and oligoasthenoteratozoospermia, respectively. The ACE deletion/deletion genotype was identified in 90 men, including 9.8% of healthy fertile men, 10.3%, 32.70% and 35.2% of those with asthenozoospermia, asthenoteratozoospermia and oligoasthenoteratozoospermia, respectively. Men with the ACE deletion/deletion and insertion/deletion genotypes showed a significant decrease in sperm count, motility, linear velocity and normal forms, acrosin activity index, hypo-osmotic swelling test and seminal α-glucosidase, and significantly increased seminal 8-iso-prostaglandin-F(2α) than those with the ACE insertion/insertion genotype. CONCLUSIONS ACE gene deletion polymorphism is associated with abnormal seminal variables, such that carriers of the ACE deletion/deletion genotype have higher seminal oxidative stress.
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Affiliation(s)
- Adel A Zalata
- Department of Medical Biochemistry, Faculty of Medicine, Mansoura University, Mansoura, Egypt
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20
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Moura AA, Souza CE, Stanley BA, Chapman DA, Killian GJ. Proteomics of cauda epididymal fluid from mature Holstein bulls. J Proteomics 2010; 73:2006-20. [DOI: 10.1016/j.jprot.2010.06.005] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2010] [Revised: 06/03/2010] [Accepted: 06/15/2010] [Indexed: 11/28/2022]
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21
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Newton L, Kastelic J, Wong B, van der Hoorn F, Thundathil J. Elevated testicular temperature modulates expression patterns of sperm proteins in Holstein bulls. Mol Reprod Dev 2009; 76:109-18. [DOI: 10.1002/mrd.20934] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Rylett CM, Walker MJ, Howell GJ, Shirras AD, Isaac RE. Male accessory glands of Drosophila melanogaster make a secreted angiotensin I-converting enzyme (ANCE), suggesting a role for the peptide-processing enzyme in seminal fluid. ACTA ACUST UNITED AC 2007; 210:3601-6. [PMID: 17921161 DOI: 10.1242/jeb.009035] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Angiotensin I-converting enzyme (ACE) expressed on the surface of endothelial cells is responsible for the last step in the synthesis of circulating angiotensin II and the inactivation of bradykinin. Mammalian ACE is also expressed in the prostate with other components of the renin-angiotensin system, and in developing spermatids, where the peptidase activity is known to be critical for normal sperm function. The importance of an ACE gene to male fertility has also been demonstrated in Drosophila melanogaster, where Ance is expressed in spermatids, and hypomorphic alleles of Ance cause a defect in spermiogenesis. Here we show that ANCE, which shares many enzymatic properties with mammalian ACE, is also a product of the male accessory gland of D. melanogaster. It is expressed in the secondary cells and is associated with the electron dense granule within the large vesicles of these cells. ACE proteolytic activity is lost from the accessory glands during mating, consistent with transfer to the mated female in the seminal fluid. The accessory gland ACE-like activity might have an evolutionarily conserved function processing biologically active peptides with a role in male fertility.
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Affiliation(s)
- Caroline M Rylett
- Institute of Integrative and Comparative Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK
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23
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Takeuchi K, Araki H, Sakaue T, Yamamoto Y, Fujiwara M, Nishi K, Ohkubo I. Porcine germinal angiotensin I-converting enzyme: isolation, characterization and molecular cloning. Comp Biochem Physiol B Biochem Mol Biol 2006; 146:215-26. [PMID: 17145192 DOI: 10.1016/j.cbpb.2006.10.108] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2006] [Revised: 10/13/2006] [Accepted: 10/20/2006] [Indexed: 11/18/2022]
Abstract
Germinal angiotensin I-converting enzyme (gACE) was purified to homogeneity from porcine seminal plasma. The molecular weight of the purified enzyme was calculated to be 182,000 on non-denaturing PAGE and 94,000 and 93,000 on SDS-PAGE in the absence and presence of beta-ME, respectively. These findings suggest that the enzyme is composed of two identical subunits in seminal plasma. The K(m), V(max), K(cat) and K(cat)/K(m) values of gACE at optimal pH (pH 7.2) were 680 microM, 1.0 micromol/mg/min, 33.1 s(-1) and 4.87 x 10(4) s(-1) M(-1) for Z-Val-Lys-Met-MCA, respectively. gACE was potently inhibited by EDTA, 1,10-phenanthroline, captopril and lisinopril, and it promptly released the dipeptides His-Leu and Phe-Arg from angiotensin I and bradykinin. Met- and Leu-enkephalins, neuromedine B and beta-neo-endorphin were also good natural substrates for gACE. We determined the structure of gACE cDNA from the porcine testis, and deduced the amino acid sequence of gACE. The cDNA is composed of 2508 bp of nucleotides in length and encodes 745 amino acids in the coding region. The overall homology of amino acid sequences between porcine, human, sheep and rat gACEs is 72.6 to 84.7%. Zinc-binding motif, chloride-binding site and positions of cysteine residues were well conserved.
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Affiliation(s)
- Keisuke Takeuchi
- Department of Medical Biochemistry, Shiga University of Medical Science, Seta, Otsu, Japan
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24
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Nikolaeva MA, Balyasnikova IV, Alexinskaya MA, Metzger R, Franke FE, Albrecht RF, Kulakov VI, Sukhikh GT, Danilov SM. Testicular Isoform of Angiotensin I-Converting Enzyme (ACE, CD143) on the Surface of Human Spermatozoa: Revelation and Quantification Using Monoclonal Antibodies. Am J Reprod Immunol 2006; 55:54-68. [PMID: 16364013 DOI: 10.1111/j.1600-0897.2005.00326.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
PROBLEM The elucidation of the role of angiotensin-converting enzyme (ACE, CD143) in the male fertility has been hampered by the absence of highly specific antibodies to the native testicular isoform (tACE). The quantification of tACE expression on human-ejaculated spermatozoa was performed using a novel panel of monoclonal antibodies (mAbs). METHOD OF STUDY The expression of tACE on the surface of live and fixed human spermatozoa was analyzed by flow cytometry and immunocytochemistry using new mAbs to human tACE. RESULTS Monoclonal antibodies 1E10 and 4E3 similarly revealed tACE on the surface of live and fixed spermatozoa. The high percentage of tACE-positive spermatozoa (median 81%) was revealed in the swim-up fraction of sperm. Antibody-induced tACE shedding occurs preferentially from live sperm with defective function and/or morphology. Testicular ACE is located on the plasma membrane of the post-acrosomal region, the neck and midpiece of normal spermatozoa, but showed a variable distribution on the defective cells. CONCLUSIONS The new mAbs recognizing the C-terminal domain of human ACE are useful tools for quantification of tACE expression on human live and fixed spermatozoa and further adequate analysis of the tACE role in reproduction.
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Affiliation(s)
- Marina A Nikolaeva
- Research Center for Obstetrics, Gynecology and Perinatology, Moscow, Russia
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25
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Meizel S. The sperm, a neuron with a tail: 'neuronal' receptors in mammalian sperm. Biol Rev Camb Philos Soc 2005; 79:713-32. [PMID: 15682867 DOI: 10.1017/s1464793103006407] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A number of plasma membrane receptor types originally thought to be specific to neurons have been found in other somatic cells. More surprisingly, the mammalian sperm and neuron appear to share many of these 'neuronal' receptors. The morphology, chromosome number, genomic activity, and functions of those two cell types are as unlike as any two cells in the body, but they both achieve their highly disparate goals with the aid of a number of the same receptors. Exocytosis in neurons and sperm is essential to the functions of these cells and is strongly influenced by similar receptors. 'Neuronal' receptor types in sperm may also play a role in the control of sperm motility (a function of course not shared by neurons). This review will consider the evidence for the presence of sperm plasma membrane 'neuronal' receptors and for their significance to mammalian sperm function. The persuasiveness of the evidence varies depending on the receptor being considered, but there is strong experimental support for the presence and importance of a number of 'neuronal' receptors in sperm.
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Affiliation(s)
- Stanley Meizel
- Department of Cell Biology and Human Anatomy, University of California, Davis School of Medicine, Davis, California, USA.
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26
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Jobim MIM, Oberst ER, Salbego CG, Wald VB, Horn AP, Mattos RC. BSP A1/A2-like proteins in ram seminal plasma. Theriogenology 2005; 63:2053-62. [PMID: 15823360 DOI: 10.1016/j.theriogenology.2004.10.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2004] [Accepted: 10/05/2004] [Indexed: 11/17/2022]
Abstract
The objective of this study was to assess the protein profile of ovine seminal plasma using 2D-PAGE and verify if BSP A1/A2 are present in ovine seminal plasma. Seminal plasma was collected from three mature rams and pooled to eliminate individual differences. Seminal plasma samples were submitted to 2D-PAGE using 12% acrylamide gels. The image analysis software identified 21 protein spots on the air-dried gel, with molecular weight ranging from 15 to 115 kDa and pI 3.2 to 8.7. The most prominent spots were those <30 kDa. The most intensely stained spots were: 3 (18-19 kDa, pI 4.8-5.0), 5 (17-18 kDa, pI 5.0-5.2), 7 (15-16 kDa, pI 6.2-6.4), and 23 (105-108 kDa, pI 6.8-7.0). Three of these spots (spots 3, 5 and 7, respectively) accounted for 41.1% of the relative intensity of the spots of the gels, based on the intensity of the Comassie blue staining. Western blot analysis indicated that spots 3 and 5 were similar to BSP A1/A2 (16.5, pI 4.7-5.0 and 16 kDa, pI 4.9-5.2) identified in Manjunath's studies [Manjunath P, Sairam MR. Purification and biochimical characterization of three major acid proteins (BSP A1, BSP A2 and BSP A3) from bovine seminal plasma. Biochem J 7 (1987) 685-92.], based on the specific reaction of the polyclonal antibody to those spots.
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Affiliation(s)
- M I M Jobim
- Department of Veterinary Clinical Pathology, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil.
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27
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Mededovic S, Fraser LR. Angiotensin II stimulates cAMP production and protein tyrosine phosphorylation in mouse spermatozoa. Reproduction 2004; 127:601-12. [PMID: 15129016 DOI: 10.1530/rep.1.00062] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Angiotensin II (AII), found in seminal plasma, has been shown to stimulate capacitation in uncapacitated mammalian spermatozoa. The present study investigated the location of AII receptors on spermatozoa and AII's mechanism of action. AT1 type receptors for AII are present on the acrosomal cap region and along the whole of the flagellum of both mouse and human spermatozoa. Because combinations of low concentrations of AII and either calcitonin or fertilization-promoting peptide (FPP), both known to regulate the adenylyl cyclase (AC)/cAMP signal transduction pathway, elicited a significant response, this study investigated the hypothesis that these peptides act on the same pathway. AII was shown to significantly stimulate cAMP production in both uncapacitated and capacitated mouse spermatozoa and this was associated with increases in protein tyrosine phosphorylation. Using an anti-phosphotyrosine antibody to visualize the location of tyrosine phosphoproteins within individual cells, AII significantly stimulated phosphorylation within 20 min in both the head, especially in the acrosomal cap region, and the flagellum, especially in the principal piece, of uncapacitated mouse spermatozoa; combined AII + FPP was stimulatory within 5 min. In addition, Western blotting revealed that AII stimulation increased phosphorylation in a number of tyrosine phosphoproteins in both uncapacitated and capacitated mouse spermatozoa, with some being altered only in the latter category of cells. These results support the hypothesis that AII stimulates AC/cAMP in mammalian spermatozoa.
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Affiliation(s)
- Samra Mededovic
- Centre for Reproduction, Endocrinology and Diabetes, School of Biomedical Sciences, King's College London, Guy's Campus, London Bridge, London SE1 1UL, UK
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28
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Ball BA, Gravance CG, Wessel MT, Sabeur K. Activity of angiotensin-converting enzyme (ACE) in reproductive tissues of the stallion and effects of angiotensin II on sperm motility. Theriogenology 2003; 59:901-14. [PMID: 12517392 DOI: 10.1016/s0093-691x(02)01127-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A testis-specific isoform of angiotensin-converting enzyme (ACE) has been identified in a number of mammalian species. The purpose of this study was to characterize the activity of ACE in equine spermatozoa, seminal plasma, and testis. Activity of ACE was determined in seminal plasma, ejaculated and epididymal spermatozoa from mature stallions as well as from pre- and postpubertal testis. The effect of addition of angiotensin II on equine sperm motility was also evaluated. The activity of ACE in detergent extracted sperm plasma membrane was approximately 13-fold higher than that detected in seminal plasma (93.7 mU/mg versus 7.0 mU/mg protein, respectively). Activity of ACE in equine testis was significantly higher in postpubertal than in prepubertal males (3.0 mU/mg versus 0.4 mU/mg protein, respectively), and ACE activity was reduced (P<0.001) in a dose-dependent fashion by the addition of captopril. The effect of angiotensin II on sperm motility was evaluated by computer-assisted semen analysis in sperm incubated with angiotensin II (0, 1, 10, 100 nM) at 38.5 degrees C. There was no significant effect of angiotensin II on the percent motile sperm; however, there was a significant main effect of angiotensin II (P<0.01) on the kinematic parameters beat cross frequency (BCF), average path velocity (VAP), and curvilinear velocity (VCL), respectively. In addition, there were significant stallionxconcentration interactions for amplitude lateral movement (ALH), BCF, linearity (LIN), straightness (STR), and VCL. This study demonstrates that ACE activity is present in sperm membrane from ejaculated and epididymal spermatozoa and in postpubertal testis. Further studies are required to determine the role of this testis-specific enzyme.
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Affiliation(s)
- B A Ball
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, One Shields Avenue, Davis, CA 95616-8743, USA.
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29
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Schill WB, Schuppe HC, Weid W, Mannign M. Proceedings of the 7th Andrology Symposium. Treatment of male infertility - viewpoints, controversies, perspectives. Giessen, Germany, 17 November 2001. Andrologia 2002. [DOI: 10.1111/j.1439-0272.2002.tb02948.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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O'Mahony OA, Djahanbahkch O, Mahmood T, Puddefoot JR, Vinson GP. Angiotensin II in human seminal fluid. Hum Reprod 2000; 15:1345-9. [PMID: 10831566 DOI: 10.1093/humrep/15.6.1345] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The renin-angiotensin system (RAS) and angiotensin II are important in sperm function and male fertility. Angiotensin II type I (AT1) receptors have been identified in developing and ejaculated human spermatozoa, and angiotensin can stimulate sperm motility, the acrosome reaction and binding to the zona pellucida. However, there is little information on the availability of the hormone to spermatozoa during the reproductive process. Seminal plasma and blood plasma obtained from normal and subfertile subjects was extracted, and angiotensin content was analysed by radioimmunoassay. Values obtained for blood angiotensin II were within the normal range at 16.0 +/- 3.1 pg/ml (mean +/- SEM). Values for seminal plasma were usually 3-5 fold higher, at 51.6 +/- 9.3 pg/ml (n = 34, P < 0.0001). High performance liquid chromatography analysis showed that approximately 80% of the immunoreactive angiotensin was attributable to angiotensin II itself. However, seminal plasma angiotensin II concentrations were not correlated with blood angiotensin II, sperm concentration or sperm motility. The results show that immunoreactive angiotensin from a source other than the circulation is available to spermatozoa in human ejaculates. The results are consistent with the concept that angiotensin II has an important role in male fertility.
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Affiliation(s)
- O A O'Mahony
- Academic Department of Obstetrics and Gynaecology and Reproductive Physiology, St Bartholomew's and Royal London School of Medicine and Dentistry, London, UK.
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Vinson GP, Saridogan E, Puddefoot JR, O'Mahony OA, Mahmood T, Djahanbakhch O. Renin-angiotensin systems and reproduction. Gynecol Endocrinol 1999; 13:56-70. [PMID: 10368799 DOI: 10.1080/09513599909167532] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Affiliation(s)
- G P Vinson
- Division of Biomedical Sciences, St Bartholomew's, London, UK
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