1
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Zhu X, Liu L, Tian S, Zhao G, Zhi E, Chen Q, Zhang F, Zhang A, Tang S, Liu C. Deleterious variant in FAM71D cause male infertility with asthenoteratospermia. Mol Genet Genomics 2024; 299:35. [PMID: 38489045 DOI: 10.1007/s00438-024-02117-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 01/24/2024] [Indexed: 03/17/2024]
Abstract
Asthenoteratospermia is a significant cause of male infertility. FAM71D (Family with sequence similarity 71, member D), as a novel protein exclusively expressed in the testis, has been found to be associated with sperm motility. However, the association of FAM71D mutation with male infertility has yet to be examined. Here, we conducted whole-exome sequencing and identified a homozygous missense mutation c.440G > A (p. Arg147Gln) of FAM71D in an asthenoteratospermia-affected man from a consanguineous family. The FAM71D variant is extremely rare in human population genome databases and predicted to be deleterious by multiple bioinformatics tools. Semen analysis indicated decreased sperm motility and obvious morphological abnormalities in sperm cells from the FAM71D-deficient man. Immunofluorescence assays revealed that the identified FAM71D mutation had an important influence on the assembly of sperm structure-related proteins. Furthermore, intra-cytoplasmic sperm injection (ICSI) treatment performed on the infertile man with FAM71D variant achieved a satisfactory outcome. Overall, our study identified FAM71D as a novel causative gene for male infertility with asthenoteratospermia, for which ICSI treatment may be suggested to acquire good prognosis. All these findings will provide effective guidance for genetic counselling and assisted reproduction treatments of asthenoteratospermia-affected subjects.
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Affiliation(s)
- Xiaobin Zhu
- Department of Gynecology and Obstetrics, Reproductive Medical Center, Shanghai Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Liu Liu
- Obstetrics and Gynecology Hospital, Institute of Medical Genetics and Genomics, Fudan University, Shanghai, 200011, China
- Department of Computational Biology, School of Life Science, Fudan University, Shanghai, 200438, China
| | - Shixiong Tian
- Human Phenome Institute, Zhangjiang Fudan International Innovation Center, Fudan University, Shanghai, 200438, China
| | - Guijun Zhao
- Shanghai Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200040, China
| | - Erlei Zhi
- Urologic Medical Center, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200940, China
| | - Qian Chen
- Department of Gynecology and Obstetrics, Reproductive Medical Center, Shanghai Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Feng Zhang
- International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Aijun Zhang
- Department of Gynecology and Obstetrics, Reproductive Medical Center, Shanghai Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Shuyan Tang
- Obstetrics and Gynecology Hospital, Institute of Medical Genetics and Genomics, Fudan University, Shanghai, 200011, China.
- Human Phenome Institute, Zhangjiang Fudan International Innovation Center, Fudan University, Shanghai, 200438, China.
| | - Chunyu Liu
- International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200030, China.
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2
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Bolton VN, Perez MJ, Hughes G, Moodley T, Dean M, Fernandez-Ponce A, Southall-Brown G, Kasraie J. The use of ICSI in ART: evidence for practice. HUM FERTIL 2023; 26:414-432. [PMID: 37609991 DOI: 10.1080/14647273.2023.2243071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
This article reviews the evidence regarding the safety and efficacy of intra-cytoplasmic sperm injection (ICSI). It provides evidence-based clinical and laboratory guidelines and recommendations for use of ICSI within an assisted reproductive technology (ART) service. The guidelines address the evidence for the use of ICSI rather than conventional IVF (cIVF); the use of ART techniques supplementary to ICSI; and risks associated with ICSI. This article is not intended to be the only approved standard of practice or to dictate an exclusive course of treatment. Other plans of management may be appropriate, taking into account the needs and medical history of the patient, available resources, and institutional or clinical practice limitations.
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Affiliation(s)
| | | | - George Hughes
- Assisted Conception Unit, Ninewells Hospital, Dundee, UK
| | - Therishnee Moodley
- The Centre for Reproductive Medicine, St. Bartholomew's Hospital, London, UK
| | - Morven Dean
- Assisted Conception Unit, Ninewells Hospital, Dundee, UK
| | | | | | - Jason Kasraie
- University of Chester and University Centre Shrewsbury, Chester, UK
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3
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Wegner S, Workman T, Park JJ, Harris S, Wallace J, Stanaway I, Hong S, Hansen B, Griffith WC, Faustman EM. A Dynamic In vitro developing testis model reflects structures and functions of testicular development in vivo. Reprod Toxicol 2023; 118:108362. [PMID: 37011698 DOI: 10.1016/j.reprotox.2023.108362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 03/03/2023] [Accepted: 03/14/2023] [Indexed: 04/03/2023]
Abstract
To better define appropriate applications of our 3-dimensional testicular co-culture as a model for reproductive toxicology, we evaluated the ability of the model to capture structural and functional elements that can be targeted by reproductive toxicants. Testicular co-cultures were prepared from postnatal day 5 male rats and cultured with a Matrigel overlay. Following a 2-day acclimation period, we characterized functional pathway dynamics by evaluating morphology, protein expression, testosterone concentrations, and global gene expression at a range of timepoints from experimental days 0 to 21. Western blotting confirmed expression of Sertoli cell, Leydig cell, and spermatogonial cell-specific protein markers. Testosterone detected in cell culture media indicates active testosterone production. Quantitative pathway analysis identified Gene Ontology biological processes enriched among genes significantly changing over the course of 21 days. Processes enriched among genes significantly increasing through time include general developmental processes (morphogenesis, tissue remodeling, etc.), steroid regulation, Sertoli cell development, immune response, and stress and apoptosis. Processes enriched among genes significantly decreasing over time include several related to male reproductive development (seminiferous tubule development, male gonad development, Leydig cell differentiation, Sertoli cell differentiation), all of which appear to peak in expression between days 1 and 5 before decreasing at later timepoints. This analysis provides a temporal roadmap for specific biological process of interest for reproductive toxicology in the model and anchors the model to sensitive phases of in vivo development, helping to define the relevance of the model for in vivo processes.
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Affiliation(s)
- Susanna Wegner
- Institute for Risk Analysis and Risk Communication, University of Washington School of Public Health, Seattle, WA, USA
| | - Tomomi Workman
- Institute for Risk Analysis and Risk Communication, University of Washington School of Public Health, Seattle, WA, USA
| | - Julie Juyoung Park
- Institute for Risk Analysis and Risk Communication, University of Washington School of Public Health, Seattle, WA, USA
| | - Sean Harris
- Institute for Risk Analysis and Risk Communication, University of Washington School of Public Health, Seattle, WA, USA
| | - James Wallace
- Institute for Risk Analysis and Risk Communication, University of Washington School of Public Health, Seattle, WA, USA
| | - Ian Stanaway
- Institute for Risk Analysis and Risk Communication, University of Washington School of Public Health, Seattle, WA, USA
| | - Sungwoo Hong
- Institute for Risk Analysis and Risk Communication, University of Washington School of Public Health, Seattle, WA, USA
| | - Brad Hansen
- Institute for Risk Analysis and Risk Communication, University of Washington School of Public Health, Seattle, WA, USA
| | - William C Griffith
- Institute for Risk Analysis and Risk Communication, University of Washington School of Public Health, Seattle, WA, USA
| | - Elaine M Faustman
- Institute for Risk Analysis and Risk Communication, University of Washington School of Public Health, Seattle, WA, USA.
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4
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Zańko A, Siewko K, Krętowski AJ, Milewski R. Lifestyle, Insulin Resistance and Semen Quality as Co-Dependent Factors of Male Infertility. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 20:ijerph20010732. [PMID: 36613051 PMCID: PMC9819053 DOI: 10.3390/ijerph20010732] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/22/2022] [Accepted: 12/27/2022] [Indexed: 05/11/2023]
Abstract
Infertility is a problem that affects millions of couples around the world. It is known as a disease of couples, not individuals, which makes diagnosis difficult and treatment unclear. Male infertility can have many causes, from mechanical ones to abnormal spermatogenesis or spermiogenesis. Semen quality is determined by a number of factors, including those dependent on men themselves, with the number of infertile men growing every year. These include, e.g., diet, physical activity, sleep quality, stress, among many others. As these factors co-exist with insulin resistance, which is a disease closely related to lifestyle, it has been singled out in the study due to its role in affecting semen quality. In order to examine connections between lifestyle, insulin resistance, and semen quality, a review of literature published from 1989 to 2020 in the following databases PubMed/Medline, EMBASE (Elsevier), Scopus, Web of Science, and Google Scholar was performed. Hence, semen quality, environment, and insulin resistance are interrelated, thus it is difficult to indicate which aspect is the cause and which is the effect in a particular relationship and the nature of possible correlations. Since the influence of lifestyle on semen quality has been extensively studied, it is recommended that more thorough research be done on the relationship between insulin resistance and semen quality, comparing the semen quality of men with and without insulin resistance.
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Affiliation(s)
- Adrianna Zańko
- Doctoral School, Medical University of Białystok, 15-089 Białystok, Poland
| | - Katarzyna Siewko
- Department of Endocrinology, Diabetology and Internal Medicine, Medical University of Białystok, 15-276 Białystok, Poland
| | - Adam Jacek Krętowski
- Department of Endocrinology, Diabetology and Internal Medicine, Medical University of Białystok, 15-276 Białystok, Poland
| | - Robert Milewski
- Department of Biostatistics and Medical Informatics, Medical University of Białystok, 15-295 Białystok, Poland
- Correspondence:
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5
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Markantoni M, Sarafidou T, Chatziparasidou A, Christoforidis N, Mamuris Z. Male infertility and the impact of lifestyle in the Greek population: A case-control study. Health Sci Rep 2022; 5:e675. [PMID: 35755412 PMCID: PMC9201462 DOI: 10.1002/hsr2.675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 05/03/2022] [Accepted: 05/15/2022] [Indexed: 11/07/2022] Open
Abstract
Background and Aims Collection of epidemiological data has become a crucial step in every fertility evaluation, especially regarding idiopathic male infertility. Information on data such as tobacco smoking, alcohol intake, and body mass index can provide crucial information regarding the dynamics between fertility status and everyday practices. We aim to set the base for epidemiological studies on male infertility in the Greek population. Methods Four hundred and fourteen Greek volunteers were asked to fill in a questionnaire regarding their characteristics and lifestyle preferences, followed by a seminogram. Depending on their answers, they were divided into groups and data were analyzed for correlation with seminogram parameters using Spearman's rank correlation test. Results Our results indicate that a high body mass index (BMI) is negatively correlated with all three seminogram parameters (number, motility, and morphology) and exposure to radiation or chemicals is negatively correlated with sperm motility, with a p < 0.01. Conclusions These findings indicate negative correlations of BMI and exposure to radiation/chemicals with semen parameters in the Greek population. Such information can be used to plan a diagnostic approach or even therapeutic interventions.
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Affiliation(s)
- Maria Markantoni
- Laboratory of Genetics, Comparative and Evolutionary Biology, Department of Biochemistry and BiotechnologyUniversity of ThessalyLarisaGreece
| | - Theologia Sarafidou
- Laboratory of Genetics, Comparative and Evolutionary Biology, Department of Biochemistry and BiotechnologyUniversity of ThessalyLarisaGreece
| | | | | | - Zissis Mamuris
- Laboratory of Genetics, Comparative and Evolutionary Biology, Department of Biochemistry and BiotechnologyUniversity of ThessalyLarisaGreece
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6
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Jafari H, Mirzaiinajmabadi K, Roudsari RL, Rakhshkhorshid M. The factors affecting male infertility: A systematic review. Int J Reprod Biomed 2021; 19:681-688. [PMID: 34568728 PMCID: PMC8458922 DOI: 10.18502/ijrm.v19i8.9615] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 09/28/2020] [Accepted: 12/05/2020] [Indexed: 11/24/2022] Open
Abstract
Background In recent years, the incidence of male infertility has increased worldwide. It is necessary to study the factors that influence male infertility in each area/region for better management. Objective To determine the factors affecting male infertility in the Iranian male population. Materials and Methods An online search was conducted in electronic databases including PubMed, Google Scholar, SID, and Scopus to identify articles on the factors associated with male infertility, published in English and Persian. The keywords used to perform the search included "factor", "epidemiology", "causes of infertility", and "male infertility". The search was conducted without a time restriction, up to April 2020. Results The search resulted in a total number of 691 studies. After an assessment of the articles, finally 14 studies were included in this study with a total number of 26,324 infertile males. The factors associated with male infertility included semen abnormalities, varicocele and testis disorder, smoking, exposure to heat, obesity, anabolic steroids, vascular abnormalities, anti-spermatogenesis factors, antidepressants, taking ranitidine and cimetidine, penile discharge and genital ulcers, painful micturition, occupational factors, alcohol, chronic disease, sexual disorder, Surgical and urological diseases, genetic factors and herpes infection. Among these, the semen and varicocele disorders were common in most studies. Conclusion The present review suggests that the factors affecting male infertility in Iran are similar to those reported from other countries. The results of this study can be used in adopting appropriate strategies for infertility management in Iran.
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Affiliation(s)
- Hamideh Jafari
- Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Khadigeh Mirzaiinajmabadi
- Nursing and Midwifery Care Research Centre, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Midwifery, School of Nursing and Midwifery, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Robab Latifnejad Roudsari
- Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran.,Nursing and Midwifery Care Research Centre, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Midwifery, School of Nursing and Midwifery, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Marzieh Rakhshkhorshid
- Department of Midwifery, Nursing and Midwifery School, Zahedan University of Medical Sciences, Zahedan, Iran
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7
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Tang Y, He QD, Zhang TT, Wang JJ, Huang SC, Ye Y. Controlled ovarian stimulation should not be preferred for male infertility treated with intrauterine insemination: a retrospective study. Reprod Biol Endocrinol 2021; 19:45. [PMID: 33740990 PMCID: PMC7977560 DOI: 10.1186/s12958-021-00730-3] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Accepted: 03/10/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Some studies have stated that intrauterine insemination (IUI) with controlled ovarian stimulation (COS) might increase the pregnancy rate, while others suggest that IUI in the natural cycle (NC) should be the first line of treatment. It remains unclear whether it is necessary to use COS at the same time when IUI is applied to treat isolated male factor infertility. Thus, we aimed to investigate efficacy of IUI with COS for isolated male factor infertility. METHODS A total of 601 IUI cycles from 307 couples who sought medical care for isolated male factor infertility between January 2010 and February 2020 were divided into two groups: NC-IUI and COS-IUI. The COS-IUI group was further divided into two subgroups according to the number of pre-ovulatory follicles on the day of HCG: cycles with monofollicular development (one follicle group) and cycles with at least two pre-ovulatory follicles (≥ 2 follicles group). The IUI outcomes, including clinical pregnancy, live birth, spontaneous abortion, ectopic pregnancy, and multiple pregnancy rates were compared. RESULTS The clinical pregnancy, live birth, spontaneous abortion, and ectopic pregnancy rates were comparable between the NC-IUI and COS-IUI group. Similar results were also observed among the NC-IUI, one follicle, and ≥ 2 follicles groups. However, with respect to the multiple pregnancy rate, a trend toward higher multiple pregnancy rate was observed in the COS-IUI group compared to the NC-IUI group (8.7% vs. 0, P = 0.091), and a significant difference was found between the NC-IUI and ≥ 2 follicles group (0 vs. 16.7%, P = 0.033). CONCLUSION In COS cycles, especially in those with at least two pre-ovulatory follicles, the multiple pregnancy rate increased without a substantial gain in overall pregnancy rate; thus, COS should not be preferred in IUI for isolated male factor infertility. If COS is required, one stimulated follicle and one healthy baby should be the goal considering the safety of both mothers and foetuses.
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Affiliation(s)
- Yan Tang
- Department of Gynecology and Obstetrics, Centre for Reproductive Medicine, Zhongshan City People's Hospital, No. 2, Sunwen East Road, Shiqi District, Zhongshan, 528400, Guangdong Province, China
| | - Qian-Dong He
- Department of Gynecology and Obstetrics, Centre for Reproductive Medicine, Zhongshan City People's Hospital, No. 2, Sunwen East Road, Shiqi District, Zhongshan, 528400, Guangdong Province, China
| | - Ting-Ting Zhang
- Department of Gynecology and Obstetrics, Centre for Reproductive Medicine, Zhongshan City People's Hospital, No. 2, Sunwen East Road, Shiqi District, Zhongshan, 528400, Guangdong Province, China
| | - Jing-Jing Wang
- Department of Gynecology and Obstetrics, Centre for Reproductive Medicine, Zhongshan City People's Hospital, No. 2, Sunwen East Road, Shiqi District, Zhongshan, 528400, Guangdong Province, China
| | - Si-Chong Huang
- Department of Gynecology and Obstetrics, Centre for Reproductive Medicine, Zhongshan City People's Hospital, No. 2, Sunwen East Road, Shiqi District, Zhongshan, 528400, Guangdong Province, China
| | - Yun Ye
- Department of Gynecology and Obstetrics, Centre for Reproductive Medicine, Zhongshan City People's Hospital, No. 2, Sunwen East Road, Shiqi District, Zhongshan, 528400, Guangdong Province, China.
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8
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Hernández-Rodríguez J, Arenas-Ríos E, Jiménez-Morales I, Cortés-Barberena E, Montes S, Vigueras-Villaseñor RM, Arteaga-Silva M. Postnatal cadmium administration affects the presence and distribution of carbohydrates in the sperm membrane during maturation in the epididymis in adult Wistar rats. Reprod Fertil Dev 2021; 33:349-362. [PMID: 33602388 DOI: 10.1071/rd20167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 01/14/2021] [Indexed: 11/23/2022] Open
Abstract
Cadmium (Cd) is a heavy metal related to a decrease in sperm parameters. The transit of spermatozoa through the epididymis is necessary to generate changes in the sperm membrane, such as the assembly of various carbohydrates that are added to the spermatazoan's surface to prepare it for successful fertilisation of the oocyte. No studies have yet analysed whether Cd alters the presence and distribution of these carbohydrates. We aimed to evaluate the changes induced by Cd in the distribution pattern of N-acetylglucosamine, sialic acid, mannose and fucose on the sperm membrane in the epididymis (e.g. caput, corpus, cauda) and if it alters the epididymal epithelium. Male Wistar pups were treated with Cd doses (0.125, 0.25 and 0.5mg/kg) on postnatal days 1-49. At postnatal day 90, they were humanely killed, sperm samples were obtained from the epididymis and tissue samples were taken for histological analysis. Cd concentrations in the blood and epididymis increased in proportion to the dose administered and decreased the serum testosterone levels and sperm quality. Histological analysis revealed alterations in the epithelium in all Cd-treated groups. Cd altered the distribution patterns of carbohydrates and fluorescence indices. All these alterations affected the structure and functioning of sperm.
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Affiliation(s)
- Joel Hernández-Rodríguez
- Doctorado en Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana, Av. San Rafael Atlixco 186, C.P. 09340, Ciudad de México, México
| | - Edith Arenas-Ríos
- Departamento de Biología de la Reproducción, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, C.P. 09340, Ciudad de México, México
| | - Irma Jiménez-Morales
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, C.P. 09340, Ciudad de México, México
| | - Edith Cortés-Barberena
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, C.P. 09340, Ciudad de México, México
| | - Sergio Montes
- Departamento de Neuroquímica, Instituto Nacional de Neurología y Neurocirugía, Manuel Velasco Suárez, Insurgentes Sur 3877, Col. La Fama, C.P. 14269, Ciudad de México, México
| | - Rosa María Vigueras-Villaseñor
- Instituto Nacional de Pediatría, Calzada México Xochimilco No. 101, Col. San Lorenzo Huipulco, Tlalpan, C.P. 14370, Ciudad de México, México
| | - Marcela Arteaga-Silva
- Departamento de Biología de la Reproducción, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, C.P. 09340, Ciudad de México, México; and Corresponding author.
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9
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Fallara G, Cazzaniga W, Boeri L, Capogrosso P, Candela L, Pozzi E, Belladelli F, Schifano N, Ventimiglia E, Abbate C, Papaleo E, Viganò P, Montorsi F, Salonia A. Male factor infertility trends throughout the last 10 years: Report from a tertiary-referral academic andrology centre. Andrology 2020; 9:610-617. [PMID: 33231922 DOI: 10.1111/andr.12947] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 10/25/2020] [Accepted: 11/18/2020] [Indexed: 12/16/2022]
Abstract
BACKGROUND Trends of male factor causes of couples' infertility over time have been poorly investigated. OBJECTIVE We investigated trends in the causes of pure male factor infertility (MFI) throughout the last 10 years in a tertiary-referral academic andrology center. MATERIAL AND METHODS Baseline characteristics at first presentation from a cohort of 1647 consecutive male factor infertility patients belonging to primary infertile couples between 2008 and 2018 have been comprehensively collected over time. Seven major causes of male factor infertility were identified: varicocoele; history of cryptorchidism; hypogonadism (primary and secondary); obstructive azoospermia; genetic abnormalities; other causes (large group including the remnant conditions of known causes); and idiopathic infertility. Rates of different male factor infertility causes over the study period were analyzed. Multivariable logistic regression models tested the likelihood of male factor infertility causes over time. Estimated trends were explored graphically. RESULTS Of all, varicocoele was found in 615 (37.3%), cryptorchidism in 124 (7.5%), genetic abnormalities in 61 (3.7%), hypogonadism in 165 (10%), obstructive conditions in 55 (3.3%), other causes in 129 (7.8%) patients, and idiopathic infertility in 498 (30.3%) patients, respectively. Over time, a reduction in the proportions of cryptorchidism and varicocoele (all P < 0.001) cases was observed, along with an increase in the proportions of hypogonadism, other causes of MFI and idiopathic cases (all P ≤ 0.01). Rates of genetic and obstructive cases remained stable. The observed trends were confirmed at logistic regression models. DISCUSSION AND CONCLUSIONS A decreasing trend in the proportions of varicocoele and cryptorchidism at first presentation was observed over the last 10 years; conversely, the proportions of idiopathic cases, hypogonadal patients, and infertile men presenting with other male factor infertility causes significantly increased over the same time frame at a single tertiary-referral academic andrology center.
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Affiliation(s)
- Giuseppe Fallara
- Division of Experimental Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Milan, Italy.,University Vita-Salute San Raffaele, Milan, Italy
| | - Walter Cazzaniga
- Division of Experimental Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Milan, Italy.,University Vita-Salute San Raffaele, Milan, Italy
| | - Luca Boeri
- Division of Experimental Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Milan, Italy.,Department of Urology, Foundation IRCCS Ca' Granda - Ospedale Maggiore Policlinico, University of Milan, Milan, Italy
| | - Paolo Capogrosso
- Division of Experimental Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Milan, Italy.,Department of Urology and Andrology, Ospedale di Circolo and Macchi Foundation, Varese, Italy
| | - Luigi Candela
- Division of Experimental Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Milan, Italy.,University Vita-Salute San Raffaele, Milan, Italy
| | - Edoardo Pozzi
- Division of Experimental Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Federico Belladelli
- Division of Experimental Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Milan, Italy.,Division of Genetics and Cell Biology, Reproductive Sciences Laboratory, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Nicolò Schifano
- Division of Experimental Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Milan, Italy.,University Vita-Salute San Raffaele, Milan, Italy
| | - Eugenio Ventimiglia
- Division of Experimental Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Costantino Abbate
- Division of Experimental Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Enrico Papaleo
- Division of Genetics and Cell Biology, Reproductive Sciences Laboratory, IRCCS Ospedale San Raffaele, Milan, Italy.,Obstetrics and Gynaecology Department, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Paola Viganò
- Division of Genetics and Cell Biology, Reproductive Sciences Laboratory, IRCCS Ospedale San Raffaele, Milan, Italy.,Obstetrics and Gynaecology Department, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Francesco Montorsi
- Division of Experimental Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Milan, Italy.,University Vita-Salute San Raffaele, Milan, Italy
| | - Andrea Salonia
- Division of Experimental Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Milan, Italy.,University Vita-Salute San Raffaele, Milan, Italy
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10
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Loss of Cx43 in Murine Sertoli Cells Leads to Altered Prepubertal Sertoli Cell Maturation and Impairment of the Mitosis-Meiosis Switch. Cells 2020; 9:cells9030676. [PMID: 32164318 PMCID: PMC7140672 DOI: 10.3390/cells9030676] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 03/04/2020] [Accepted: 03/05/2020] [Indexed: 12/12/2022] Open
Abstract
Male factor infertility is a problem in today’s society but many underlying causes are still unknown. The generation of a conditional Sertoli cell (SC)-specific connexin 43 (Cx43) knockout mouse line (SCCx43KO) has provided a translational model. Expression of the gap junction protein Cx43 between adjacent SCs as well as between SCs and germ cells (GCs) is known to be essential for the initiation and maintenance of spermatogenesis in different species and men. Adult SCCx43KO males show altered spermatogenesis and are infertile. Thus, the present study aims to identify molecular mechanisms leading to testicular alterations in prepubertal SCCx43KO mice. Transcriptome analysis of 8-, 10- and 12-day-old mice was performed by next-generation sequencing (NGS). Additionally, candidate genes were examined by qRT-PCR and immunohistochemistry. NGS revealed many significantly differentially expressed genes in the SCCx43KO mice. For example, GC-specific genes were mostly downregulated and found to be involved in meiosis and spermatogonial differentiation (e.g., Dmrtb1, Sohlh1). In contrast, SC-specific genes implicated in SC maturation and proliferation were mostly upregulated (e.g., Amh, Fshr). In conclusion, Cx43 in SCs appears to be required for normal progression of the first wave of spermatogenesis, especially for the mitosis-meiosis switch, and also for the regulation of prepubertal SC maturation.
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Toragall MM, Satapathy SK, Kadadevaru GG, Hiremath MB. Evaluation of Seminal Fructose and Citric Acid Levels in Men with Fertility Problem. J Hum Reprod Sci 2019; 12:199-203. [PMID: 31576076 PMCID: PMC6764227 DOI: 10.4103/jhrs.jhrs_155_18] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
CONTEXT Male infertility is a medical problem, attributed to 50% of infertility. Seminal plasma can be an anticipating factor as it comprises secretions of accessory sex gland, thus offering novel and precise ways to understand potential roles of these biochemical markers in male infertility. AIM The objective of this study was to assess the correlation between biochemical markers and sperm parameters in envisaging male infertility. SUBJECTS AND DESIGN We enlisted 105 men with fertility issue as patients and 25 fertile men as controls to evaluate the sperm parameters and biochemical markers, namely fructose and citric acid in ascertaining male infertility. MATERIALS AND METHODS The semen samples from patients were collected properly and analyzed according to the World Health Organization-2010 manual. Later samples were centrifuged, seminal plasma was collected, and biochemical markers assessment was carried out by standard protocols. STATISTICS Descriptive statistics, independent t-test, one-way ANOVA, and Pearson correlation were used for statistical analysis of different variables using SPSS 20.0. The mean sperm count and motility by all infertile conditions displayed a significant difference when compared with the controls (P < 0.05). RESULTS The mean fructose levels of oligozoospermia showed a nonsignificance difference when compared with controls (P < 0.05). Asthenozoospermia, asthenoteratozoospermia, and azoospermia had a significance difference (P < 0.05) for citric acid levels. Pearson correlation coefficient showed significant negative correlation of sperm count (r = -0.564) and sperm motility (r = -0.574) with fructose levels. Whereas seminal citric acid concentration had a positive correlation with sperm count (r = 0.458) and sperm motility (r = 0.446). CONCLUSION Therefore, evaluation of certain biochemical markers of seminal fluid may benefit in understanding the functionality of accessory glands which subsidizes significantly to the seminal volume.
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Affiliation(s)
- Makhadumsab M. Toragall
- Department of Biotechnology and Microbiology, Karnatak University, Dharwad, Karnataka, India
| | | | | | - Murigendra B. Hiremath
- Department of Biotechnology and Microbiology, Karnatak University, Dharwad, Karnataka, India
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Hilbold E, Bergmann M, Fietz D, Kliesch S, Weidner W, Langeheine M, Rode K, Brehm R. Immunolocalization of DMRTB1 in human testis with normal and impaired spermatogenesis. Andrology 2019; 7:428-440. [PMID: 30920770 DOI: 10.1111/andr.12617] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 03/01/2019] [Accepted: 03/04/2019] [Indexed: 12/11/2022]
Abstract
BACKGROUND The transcription factor DMRTB1 plays a pivotal role in coordinating the transition between mitosis and meiosis in murine germ cells. No reliable data are available for human testis. OBJECTIVES The present study aims to examine the testicular expression pattern of DMRTB1 in men showing normal and impaired spermatogenesis. MATERIALS AND METHODS Immunohistochemistry was performed using 54 human testicular biopsy specimens and a commercial rabbit polyclonal anti-DMRTB1 primary antibody. RT-PCR complemented immunohistochemistry. To further characterize immunopositive cells and possible co-localization, the proliferation marker Ki-67, the tumor marker PLAP, and an anti-DMRT1 antibody were used. RESULTS In men with normal spermatogenesis, a strong immunoreactivity was detectable in a subset of spermatogonia (38.34 ± 2.14%). Some spermatocytes showed a weak immunostaining. Adjacent Sertoli cells were immunonegative. Compared with a hematoxylin and eosin overview staining, these immunopositive cells were almost exclusively identified as Apale and B spermatogonia and primary spermatocytes in (pre-)leptotene, zygotene, and pachytene stages. In patients with spermatogenic arrest at spermatogonial level, an altered staining pattern was found. No immunoreactivity was detected in Sertoli cells in Sertoli cell-only syndrome. In germ cell neoplasia in situ (GCNIS) tubules, except for a few (0.4 ± 0.03%), pre-invasive tumor cells were immunonegative. Seminoma cells showed no immunostaining. DISCUSSION According to previous findings in mice, it seems reasonable that DMRTB1 is expressed in these normal germ cell populations. Moreover, altered staining pattern in spermatogenic arrest at spermatogonial stage suggests a correlation with mitosis and transformation into B spermatogonia. The absence of DMRTB1 in GCNIS cells and tumor cells might be associated with uncontrolled neoplastic cell proliferation and progression into invasive germ cell tumors. Further research is required to elucidate, for example, the role of DMRTB1 in the malignant transformation of human germ cells. CONCLUSION Our data indicate a relevant role for DMRTB1 regarding the entry of spermatogonia into meiosis in men.
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Affiliation(s)
- E Hilbold
- Institute for Anatomy, University of Veterinary Medicine Hannover, Hannover, Germany
| | - M Bergmann
- Institute for Veterinary Anatomy, Histology and Embryology, Justus Liebig University, Giessen, Germany
| | - D Fietz
- Institute for Veterinary Anatomy, Histology and Embryology, Justus Liebig University, Giessen, Germany
| | - S Kliesch
- Department of Clinical and Surgical Andrology, Centre of Reproductive Medicine and Andrology, University Hospital Münster, Münster, Germany
| | - W Weidner
- Department of Urology, Pediatric Urology and Andrology, Justus Liebig University, Giessen, Germany
| | - M Langeheine
- Institute for Anatomy, University of Veterinary Medicine Hannover, Hannover, Germany
| | - K Rode
- Institute for Anatomy, University of Veterinary Medicine Hannover, Hannover, Germany
| | - R Brehm
- Institute for Anatomy, University of Veterinary Medicine Hannover, Hannover, Germany
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Hanna E, Gough B, Hudson N. Fit to father? Online accounts of lifestyle changes and help-seeking on a male infertility board. SOCIOLOGY OF HEALTH & ILLNESS 2018; 40:937-953. [PMID: 29626356 DOI: 10.1111/1467-9566.12733] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The reproductive realm is routinely viewed as a feminised space requiring women's commitment and labour. By contrast, men's procreative contributions and 'reproductive masculinity' is represented as unproblematic, with men assumed to be fertile across the lifespan. Recent scientific research has, however, cast doubt over these longstanding assumptions, suggesting that a link does exist between 'lifestyle' factors and male fertility. The notion that fertility can be improved with effort (for both women and men) can be located within wider cultural and political shifts which construct individuals as increasingly responsible for acting on health messages and engaging in self-disciplining body projects. Through an exploration of 'lifestyle changes' within a men's online infertility discussion forum board, this paper examines how discourses of individualisation healthism and masculinity are reproduced and interlinked. Our thematic analysis indicates that 'lifestyle work' is construed as crucial for achieving conception - and as a means to demonstrate men's commitment to the dyadic goal of parenthood, which in turn may challenge and extend previous notions of 'reproductive masculinity'.
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Affiliation(s)
- Esmée Hanna
- Centre for Health Promotion Research, Leeds Beckett University, Leeds, UK
| | - Brendan Gough
- School of Social Sciences, Leeds Beckett University, Leeds, UK
| | - Nicky Hudson
- Applied Social Sciences, De Montfort University, Leicester, UK
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Drug delivery to the testis: current status and potential pathways for the development of novel therapeutics. Drug Deliv Transl Res 2015; 1:351-60. [PMID: 25788421 DOI: 10.1007/s13346-011-0039-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Nanotechnology has been increasingly utilized for the targeting and delivery of novel therapeutic agents to different tissues and cell types. The current therapeutic options for testicular disorders fall short in many instances due to difficulty traversing the blood-testis barrier, systemic toxicities, and complicated dosing regiments. For testicular tissue, potential targeting can be obtained either via anatomic methods or specific ligands such as luteinizing hormone or follicle-stimulating hormone analogs. Potential novel therapeutic agents include DNA, RNA, cytokines, peptide receptor antagonists, peptide receptor agonists, hormones, and enzymes. Nanotherapeutic treatment of testicular cancer, infertility, testicular torsion, orchalgia, hypogonadism, testicular infections, and cryptorchidism within the framework of potential target cells are an emerging area of research. While there are many potential applications of nanotechnology in drug delivery to the testis, this remains a relatively unexplored field. This review highlights the current status as well as potential future of nanotechnology in the development of novel therapeutics for testicular disorders.
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Naillat F, Veikkolainen V, Miinalainen I, Sipilä P, Poutanen M, Elenius K, Vainio SJ. ErbB4, a receptor tyrosine kinase, coordinates organization of the seminiferous tubules in the developing testis. Mol Endocrinol 2014; 28:1534-46. [PMID: 25058600 DOI: 10.1210/me.2013-1244] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Although close to every fifth couple nowadays has difficulty conceiving, the molecular mechanisms behind the decline in human reproduction remain poorly understood. We report here that the receptor tyrosine kinase Erbb4 is a candidate causal gene, because it is expressed in a sexually dimorphic manner and is abundant in the developing and adult testes in the mouse. Sertoli cell-specific Erbb4-knockout mice have a compromised 3-dimensional organization of the testicular seminiferous tubules that affects their fertility. More specifically, adhesion defects are observed in the absence of Erbb4, which are characterized by changes in the expression of laminin-1, N-cadherin, claudin-3, and certain cell-cell junction components between the Sertoli and germ cells. Interestingly, Erbb4 knockout also had an effect on the Leydig cells, which suggests a paracrine influence of Sertoli cells expressing ErbB4. Many of the defects observed in Erbb4-knockout mice are rescued in targeted ERBB4 gain-of-function mice, pointing to a coordination role for ErbB4 in the developing testis. Thus, the ErbB4 receptor tyrosine kinase promotes seminiferous tubule development by controlling Sertoli cell and germ cell adhesion.
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Affiliation(s)
- Florence Naillat
- Oulu Centre for Cell-Matrix Research (F.N., S.J.V.), Biocenter Oulu, Infotech Oulu, Laboratory of Developmental Biology, Faculty of Biochemistry and Molecular Medicine, University of Oulu, FI-90220 Oulu, Finland; Department of Medical Biochemistry and Genetics (V.V., K.E.), and Medicity Research Laboratory, University of Turku, FI-20520 Turku, Finland; Electron Microscopy Unit (I.M.), FI-90220 Oulu, Finland; Laboratory Animal Center (P.S.), University of Helsinki, FIN-00014 Helsinki, Finland; Department of Physiology (M.P.), Turku University Hospital, FI-2001 4 Turku, Finland; and Department of Oncology (K.E.), Turku University Hospital, FI-20520 Turku, Finland
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Lemoine ME, Ravitsky V. Toward a Public Health Approach to Infertility: The Ethical Dimensions of Infertility Prevention. Public Health Ethics 2013. [DOI: 10.1093/phe/pht026] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lewis SEM. Sperm DNA Fragmentation and Base Oxidation. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2013; 791:103-16. [DOI: 10.1007/978-1-4614-7783-9_7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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McIver SC, Loveland KL, Roman SD, Nixon B, Kitazawa R, McLaughlin EA. The chemokine CXCL12 and its receptor CXCR4 are implicated in human seminoma metastasis. Andrology 2013; 1:517-29. [DOI: 10.1111/j.2047-2927.2013.00081.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Revised: 01/16/2013] [Accepted: 02/04/2013] [Indexed: 10/27/2022]
Affiliation(s)
- S. C. McIver
- ARC Centre of Excellence in Biotechnology & Development; Discipline of Biological Sciences School of Environmental & Life Sciences; University of Newcastle; Callaghan; NSW; Australia
| | | | - S. D. Roman
- ARC Centre of Excellence in Biotechnology & Development; Discipline of Biological Sciences School of Environmental & Life Sciences; University of Newcastle; Callaghan; NSW; Australia
| | - B. Nixon
- ARC Centre of Excellence in Biotechnology & Development; Discipline of Biological Sciences School of Environmental & Life Sciences; University of Newcastle; Callaghan; NSW; Australia
| | - R. Kitazawa
- Division of Molecular Pathology; Graduate School of Medicine; Ehime University; Ehime; Japan
| | - E. A. McLaughlin
- ARC Centre of Excellence in Biotechnology & Development; Discipline of Biological Sciences School of Environmental & Life Sciences; University of Newcastle; Callaghan; NSW; Australia
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Affiliation(s)
- Stamatios Karavolos
- Obstetrics and Gynaecology; The Gateshead Fertility Unit; Queen Elizabeth Hospital; Gateshead; NE9 6SX; UK
| | - Jane Stewart
- Newcastle Fertility Centre at Life; International Centre for Life; Times Square; Newcastle upon Tyne; NE1 4EP; UK
| | - Isaac Evbuomwan
- The Gateshead Fertility Unit; Queen Elizabeth Hospital; Gateshead; NE9 6SX; UK
| | - Kevin McEleny
- Newcastle Fertility Centre at Life; International Centre for Life; Times Square; Newcastle upon Tyne; NE1 4EP; UK
| | - Ian Aird
- The Gateshead Fertility Unit; Queen Elizabeth Hospital; Gateshead; NE9 6SX; UK
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Simon L, Proutski I, Stevenson M, Jennings D, McManus J, Lutton D, Lewis S. Sperm DNA damage has a negative association with live-birth rates after IVF. Reprod Biomed Online 2013. [DOI: 10.1016/j.rbmo.2012.09.019] [Citation(s) in RCA: 139] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Giese S, Hossain H, Markmann M, Chakraborty T, Tchatalbachev S, Guillou F, Bergmann M, Failing K, Weider K, Brehm R. Sertoli-cell-specific knockout of connexin 43 leads to multiple alterations in testicular gene expression in prepubertal mice. Dis Model Mech 2012; 5:895-913. [PMID: 22699423 PMCID: PMC3484871 DOI: 10.1242/dmm.008649] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
A significant decline in human male reproductive function has been reported for the past 20 years but the molecular mechanisms remain poorly understood. However, recent studies showed that the gap junction protein connexin-43 (CX43; also known as GJA1) might be involved. CX43 is the predominant testicular connexin (CX) in most species, including in humans. Alterations of its expression are associated with different forms of spermatogenic disorders and infertility. Men with impaired spermatogenesis often exhibit a reduction or loss of CX43 expression in germ cells (GCs) and Sertoli cells (SCs). Adult male transgenic mice with a conditional knockout (KO) of the Gja1 gene [referred to here as connexin-43 (Cx43)] in SCs (SCCx43KO) show a comparable testicular phenotype to humans and are infertile. To detect possible signaling pathways and molecular mechanisms leading to the testicular phenotype in adult SCCx43KO mice and to their failure to initiate spermatogenesis, the testicular gene expression of 8-day-old SCCx43KO and wild-type (WT) mice was compared. Microarray analysis revealed that 658 genes were significantly regulated in testes of SCCx43KO mice. Of these genes, 135 were upregulated, whereas 523 genes were downregulated. For selected genes the results of the microarray analysis were confirmed using quantitative real-time PCR and immunostaining. The majority of the downregulated genes are GC-specific and are essential for mitotic and meiotic progression of spermatogenesis, including Stra8, Dazl and members of the DM (dsx and map-3) gene family. Other altered genes can be associated with transcription, metabolism, cell migration and cytoskeleton organization. Our data show that deletion of Cx43 in SCs leads to multiple alterations of gene expression in prepubertal mice and primarily affects GCs. The candidate genes could represent helpful markers for investigators exploring human testicular biopsies from patients showing corresponding spermatogenic deficiencies and for studying the molecular mechanisms of human male sterility.
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Affiliation(s)
- Sarah Giese
- Institute of Veterinary Anatomy, Histology and Embryology, University of Giessen, 35392 Giessen, Germany
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Current World Literature. Curr Opin Obstet Gynecol 2012; 24:194-9. [DOI: 10.1097/gco.0b013e328353d51d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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McIver SC, Stanger SJ, Santarelli DM, Roman SD, Nixon B, McLaughlin EA. A unique combination of male germ cell miRNAs coordinates gonocyte differentiation. PLoS One 2012; 7:e35553. [PMID: 22536405 PMCID: PMC3334999 DOI: 10.1371/journal.pone.0035553] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Accepted: 03/21/2012] [Indexed: 12/16/2022] Open
Abstract
The last 100 years have seen a concerning decline in male reproductive health associated with decreased sperm production, sperm function and male fertility. Concomitantly, the incidence of defects in reproductive development, such as undescended testes, hypospadias and testicular cancer has increased. Indeed testicular cancer is now recognised as the most common malignancy in young men. Such cancers develop from the pre-invasive lesion Carcinoma in Situ (CIS), a dysfunctional precursor germ cell or gonocyte which has failed to successfully differentiate into a spermatogonium. It is therefore essential to understand the cellular transition from gonocytes to spermatogonia, in order to gain a better understanding of the aetiology of testicular germ cell tumours. MicroRNA (miRNA) are important regulators of gene expression in differentiation and development and thus highly likely to play a role in the differentiation of gonocytes. In this study we have examined the miRNA profiles of highly enriched populations of gonocytes and spermatogonia, using microarray technology. We identified seven differentially expressed miRNAs between gonocytes and spermatogonia (down-regulated: miR-293, 291a-5p, 290-5p and 294*, up-regulated: miR-136, 743a and 463*). Target prediction software identified many potential targets of several differentially expressed miRNA implicated in germ cell development, including members of the PTEN, and Wnt signalling pathways. These targets converge on the key downstream cell cycle regulator Cyclin D1, indicating that a unique combination of male germ cell miRNAs coordinate the differentiation and maintenance of pluripotency in germ cells.
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Affiliation(s)
- Skye C. McIver
- ARC Centre of Excellence in Biotechnology and Development, Discipline of Biological Sciences, School of Environmental and Life Sciences, University of Newcastle, Callaghan, New South Wales, Australia
| | - Simone J. Stanger
- ARC Centre of Excellence in Biotechnology and Development, Discipline of Biological Sciences, School of Environmental and Life Sciences, University of Newcastle, Callaghan, New South Wales, Australia
| | - Danielle M. Santarelli
- School of Biomedical Sciences and Pharmacy, University of Newcastle, Callaghan, New South Wales, Australia
| | - Shaun D. Roman
- ARC Centre of Excellence in Biotechnology and Development, Discipline of Biological Sciences, School of Environmental and Life Sciences, University of Newcastle, Callaghan, New South Wales, Australia
| | - Brett Nixon
- ARC Centre of Excellence in Biotechnology and Development, Discipline of Biological Sciences, School of Environmental and Life Sciences, University of Newcastle, Callaghan, New South Wales, Australia
| | - Eileen A. McLaughlin
- ARC Centre of Excellence in Biotechnology and Development, Discipline of Biological Sciences, School of Environmental and Life Sciences, University of Newcastle, Callaghan, New South Wales, Australia
- * E-mail:
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Deonandan R, Jaleel M. Global decline in semen quality: ignoring the developing world introduces selection bias. Int J Gen Med 2012; 5:303-6. [PMID: 22505829 PMCID: PMC3325016 DOI: 10.2147/ijgm.s30673] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Multiple studies from around the world have suggested that semen quality is declining globally. However, all studies suffer from variable semen sampling criteria, selection bias with respect to the types of men volunteering to participate, and a bias with respect to a tendency to examine only samples from high-income countries. This heterogeneity in approaches, especially given the undersampling of rural and less affluent men from low-income countries, calls into question researchers’ claims of universally declining semen norms.
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Affiliation(s)
- Raywat Deonandan
- Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
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du Plessis SS, Kashou AH, Benjamin DJ, Yadav SP, Agarwal A. Proteomics: a subcellular look at spermatozoa. Reprod Biol Endocrinol 2011; 9:36. [PMID: 21426553 PMCID: PMC3071316 DOI: 10.1186/1477-7827-9-36] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Accepted: 03/22/2011] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Male-factor infertility presents a vexing problem for many reproductively active couples. Many studies have focused on abnormal sperm parameters. Recent advances in proteomic techniques, especially in mass spectrometry, have aided in the study of sperm and more specifically, sperm proteins. The aim of this study was to review the current literature on the various proteomic techniques, and their usefulness in diagnosing sperm dysfunction and potential applications in the clinical setting. METHODS Review of PubMed database. Key words: spermatozoa, proteomics, protein, proteome, 2D-PAGE, mass spectrometry. RESULTS Recently employed proteomic methods, such as two-dimensional polyacrylamide gel electrophoresis, mass spectrometry, and differential in gel electrophoresis, have identified numerous sperm-specific proteins. They also have provided a further understanding of protein function involved in sperm processes and for the differentiation between normal and abnormal states. In addition, studies on the sperm proteome have demonstrated the importance of post-translational modifications, and their ability to bring about physiological changes in sperm function. No longer do researchers believe that in order for them to elucidate the biochemical functions of genes, mere knowledge of the human genome sequence is sufficient. Moreover, a greater understanding of the physiological function of every protein in the tissue-specific proteome is essential in order to unravel the biological display of the human genome. CONCLUSION Recent advances in proteomic techniques have provided insight into sperm function and dysfunction. Several multidimensional separation techniques can be utilized to identify and characterize spermatozoa. Future developments in bioinformatics can further assist researchers in understanding the vast amount of data collected in proteomic studies. Moreover, such advances in proteomics may help to decipher metabolites which can act as biomarkers in the detection of sperm impairments and to potentially develop treatment for infertile couples.Further comprehensive studies on sperm-specific proteome, mechanisms of protein function and its proteolytic regulation, biomarkers and functional pathways, such as oxidative-stress induced mechanisms, will provide better insight into physiological functions of the spermatozoa. Large-scale proteomic studies using purified protein assays will eventually lead to the development of novel biomarkers that may allow for detection of disease states, genetic abnormalities, and risk factors for male infertility. Ultimately, these biomarkers will allow for a better diagnosis of sperm dysfunction and aid in drug development.
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Affiliation(s)
- Stefan S du Plessis
- Division of Medical Physiology, Stellenbosch University, Tygerberg, South Africa
| | - Anthony H Kashou
- Center for Reproductive Medicine, Cleveland Clinic, Cleveland, Ohio, USA
| | - David J Benjamin
- Center for Reproductive Medicine, Cleveland Clinic, Cleveland, Ohio, USA
| | - Satya P Yadav
- Molecular Biotechnology Core Laboratory, The Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio, USA
| | - Ashok Agarwal
- Center for Reproductive Medicine, Cleveland Clinic, Cleveland, Ohio, USA
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