51
|
Colaco S, Modi D. Genetics of the human Y chromosome and its association with male infertility. Reprod Biol Endocrinol 2018; 16:14. [PMID: 29454353 PMCID: PMC5816366 DOI: 10.1186/s12958-018-0330-5] [Citation(s) in RCA: 125] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 02/06/2018] [Indexed: 12/12/2022] Open
Abstract
The human Y chromosome harbors genes that are responsible for testis development and also for initiation and maintenance of spermatogenesis in adulthood. The long arm of the Y chromosome (Yq) contains many ampliconic and palindromic sequences making it predisposed to self-recombination during spermatogenesis and hence susceptible to intra-chromosomal deletions. Such deletions lead to copy number variation in genes of the Y chromosome resulting in male infertility. Three common Yq deletions that recur in infertile males are termed as AZF (Azoospermia Factor) microdeletions viz. AZFa, AZFb and AZFc. As estimated from data of nearly 40,000 Y chromosomes, the global prevalence of Yq microdeletions is 7.5% in infertile males; however the European infertile men are less susceptible to Yq microdeletions, the highest prevalence is in Americans and East Asian infertile men. In addition, partial deletions of the AZFc locus have been associated with infertility but the effect seems to be ethnicity dependent. Analysis of > 17,000 Y chromosomes from fertile and infertile men has revealed an association of gr/gr deletion with male infertility in Caucasians and Mongolian men, while the b2/b3 deletion is associated with male infertility in African and Dravidian men. Clinically, the screening for Yq microdeletions would aid the clinician in determining the cause of male infertility and decide a rational management strategy for the patient. As these deletions are transmitted to 100% of male offspring born through assisted reproduction, testing of Yq deletions will allow the couples to make an informed choice regarding the perpetuation of male infertility in future generations. With the emerging data on association of Yq deletions with testicular cancers and neuropsychiatric conditions long term follow-up data is urgently needed for infertile men harboring Yq deletions. If found so, the information will change the current the perspective of androgenetics from infertility and might have broad implication in men health.
Collapse
Affiliation(s)
- Stacy Colaco
- Department of Molecular and Cellular Biology, ICMR-National Institute for Research in Reproductive Health, JM Street, Parel, Mumbai, Maharashtra, 400012, India
| | - Deepak Modi
- Department of Molecular and Cellular Biology, ICMR-National Institute for Research in Reproductive Health, JM Street, Parel, Mumbai, Maharashtra, 400012, India.
| |
Collapse
|
52
|
Ahmed I, Abdelateef S, Laqqan M, Amor H, Abdel-Lah MA, Hammadeh ME. Influence of extended incubation time on Human sperm chromatin condensation, sperm DNA strand breaks and their effect on fertilisation rate. Andrologia 2018; 50:e12960. [PMID: 29441594 DOI: 10.1111/and.12960] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/03/2018] [Indexed: 11/29/2022] Open
Abstract
The purpose of this study was to determine influence of extended incubation time on sperm chromatin condensation and DNA strand breaks and their effect on fertilisation rate. Forty couples undergoing ICSI therapy were included. Semen was prepared by PureSperm gradient centrifugation and divided into two parts. The first part (G1) was used immediately for ICSI, whereas the second part (G2) was kept in the incubator at 37°C, 5% and 90% Humidity for 5 hr, and thereafter, the capacitated spermatozoa were used for ICSI. The TUNEL test and chromomycin CMA3 were used to evaluate the DNA strand breaks and chromatin condensation respectively. The percentage of condensed chromatin was 73.92 ± 12.70 in the group 1 and 81.13 ± 10.31% in group 2 (p = .001). However, the double-strand breaks were 11.15 ± 8.67% in G.1 and 16.30 ± 11.12% in G.2. (p = .001). Fertilisation rate in the (Group 1) was 62.45% and 69.17% in (Group 2). There was a positive correlation between condensed chromatin and fertilisation rate (r = 0.846, p = .001) and a negative correlation with DNA double-strand breaks (r = -0.802; p = .001). In conclusion, the prolonged sperm incubation (5 hr) leads to a higher chromatin condensation and to a significantly increased number of DNA strands double breaks with no influence on fertilisation rates.
Collapse
Affiliation(s)
- I Ahmed
- Department of Obstetrics & Gynecology, University of Saarland, Homburg, Germany
- Department of Obstetrics & Gynecology, Sohag University, Sohag, Egypt
| | - S Abdelateef
- Department of Obstetrics & Gynecology, University of Saarland, Homburg, Germany
| | - M Laqqan
- Department of Obstetrics & Gynecology, University of Saarland, Homburg, Germany
| | - H Amor
- Department of Obstetrics & Gynecology, University of Saarland, Homburg, Germany
| | - M A Abdel-Lah
- Department of Obstetrics & Gynecology, Sohag University, Sohag, Egypt
| | - M E Hammadeh
- Department of Obstetrics & Gynecology, University of Saarland, Homburg, Germany
| |
Collapse
|
53
|
Zhang HG, Wang RX, Pan Y, Zhang H, Li LL, Zhu HB, Liu RZ. A report of nine cases and review of the literature of infertile men carrying balanced translocations involving chromosome 5. Mol Cytogenet 2018; 11:10. [PMID: 29416565 PMCID: PMC5785882 DOI: 10.1186/s13039-018-0360-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 01/16/2018] [Indexed: 12/21/2022] Open
Abstract
Background Balanced translocations may cause the loss of genetic material at the breakpoints and may result in failure of spermatogenesis. However, carriers of reciprocal translocation may naturally conceive. Genetic counseling of male carriers of translocations remains challenging. This study explores the clinical features of carriers of chromosome 5 translocations, enabling informed genetic counseling of these patients. Results Of 82 translocation carriers, 9 (11%) were carriers of a chromosome 5 translocation. One case had azoospermia, while three cases had experienced recurrent spontaneous abortions, two cases had each experienced stillbirth, and three cases produced a phenotypically normal child confirmed by amniocentesis. A literature review identified 106 patients who carried chromosome 5 translocations. The most common chromosome 5 translocation was t(4,5), observed in 13 patients. Breakpoint at 5p15 was observed in 11 patients. All breakpoints at chromosome 5 were associated with gestational infertility. Conclusion In genetic counseling, physicians should consider chromosome 5 and its breakpoints. Carriers of chromosome 5 translocations may continue with natural conception or use assisted reproductive technologies, such as preimplantation genetic diagnosis.
Collapse
Affiliation(s)
- Hong-Guo Zhang
- Center for Reproductive Medicine and Center for Prenatal Diagnosis, First Hospital, Jilin University, 71 Xinmin Street, Chaoyang District, Changchun, Jilin Province 130021 China
| | - Rui-Xue Wang
- Center for Reproductive Medicine and Center for Prenatal Diagnosis, First Hospital, Jilin University, 71 Xinmin Street, Chaoyang District, Changchun, Jilin Province 130021 China
| | - Yuan Pan
- Center for Reproductive Medicine and Center for Prenatal Diagnosis, First Hospital, Jilin University, 71 Xinmin Street, Chaoyang District, Changchun, Jilin Province 130021 China
| | - Han Zhang
- Center for Reproductive Medicine and Center for Prenatal Diagnosis, First Hospital, Jilin University, 71 Xinmin Street, Chaoyang District, Changchun, Jilin Province 130021 China
| | - Lei-Lei Li
- Center for Reproductive Medicine and Center for Prenatal Diagnosis, First Hospital, Jilin University, 71 Xinmin Street, Chaoyang District, Changchun, Jilin Province 130021 China
| | - Hai-Bo Zhu
- Center for Reproductive Medicine and Center for Prenatal Diagnosis, First Hospital, Jilin University, 71 Xinmin Street, Chaoyang District, Changchun, Jilin Province 130021 China
| | - Rui-Zhi Liu
- Center for Reproductive Medicine and Center for Prenatal Diagnosis, First Hospital, Jilin University, 71 Xinmin Street, Chaoyang District, Changchun, Jilin Province 130021 China
| |
Collapse
|
54
|
Harper JC, Aittomäki K, Borry P, Cornel MC, de Wert G, Dondorp W, Geraedts J, Gianaroli L, Ketterson K, Liebaers I, Lundin K, Mertes H, Morris M, Pennings G, Sermon K, Spits C, Soini S, van Montfoort APA, Veiga A, Vermeesch JR, Viville S, Macek M. Recent developments in genetics and medically assisted reproduction: from research to clinical applications. Eur J Hum Genet 2018; 26:12-33. [PMID: 29199274 PMCID: PMC5839000 DOI: 10.1038/s41431-017-0016-z] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Accepted: 09/14/2017] [Indexed: 12/15/2022] Open
Abstract
Two leading European professional societies, the European Society of Human Genetics and the European Society for Human Reproduction and Embryology, have worked together since 2004 to evaluate the impact of fast research advances at the interface of assisted reproduction and genetics, including their application into clinical practice. In September 2016, the expert panel met for the third time. The topics discussed highlighted important issues covering the impacts of expanded carrier screening, direct-to-consumer genetic testing, voiding of the presumed anonymity of gamete donors by advanced genetic testing, advances in the research of genetic causes underlying male and female infertility, utilisation of massively parallel sequencing in preimplantation genetic testing and non-invasive prenatal screening, mitochondrial replacement in human oocytes, and additionally, issues related to cross-generational epigenetic inheritance following IVF and germline genome editing. The resulting paper represents a consensus of both professional societies involved.
Collapse
Affiliation(s)
- J C Harper
- Institute for Women's Health, University College London, London, UK
| | - K Aittomäki
- Laboratory of Genetics, Helsinki University Hospital, Helsinki, Finland
| | - P Borry
- Department of Public Health and Primary Care, Centre for Biomedical Ethics and Law, KU Leuven, Leuven, Belgium
| | - M C Cornel
- Department of Clinical Genetics, Section Community Genetics, Amsterdam Public Health Research Institute, VU University Medical Center, Amsterdam, The Netherlands
| | - G de Wert
- Department of Health, Ethics and Society, Research Schools CAPHRI and GROW, Maastricht University, Maastricht, The Netherlands
| | - W Dondorp
- Department of Health, Ethics and Society, Research Schools CAPHRI and GROW, Maastricht University, Maastricht, The Netherlands
| | - J Geraedts
- Department Genetics and Cell Biology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - L Gianaroli
- S.I.S.Me.R. Reproductive Medicine Unit, Bologna, Italy
| | | | - I Liebaers
- Center for Medical Genetics, UZ Brussels, Brussels, Belgium
- Research Group Reproduction and Genetics, Vrije Universiteit Brussel, Brussels, Belgium
| | - K Lundin
- Reproductive Medicine, Sahlgrenska University Hospital, Göteborg, Sweden
| | - H Mertes
- Bioethics Institute Ghent, Department of Philosophy and Moral Science, Ghent University, Ghent, Belgium
| | - M Morris
- Synlab Genetics, Lausanne, Switzerland
| | - G Pennings
- Bioethics Institute Ghent, Department of Philosophy and Moral Science, Ghent University, Ghent, Belgium
| | - K Sermon
- Research Group Reproduction and Genetics, Vrije Universiteit Brussel, Brussels, Belgium
| | - C Spits
- Research Group Reproduction and Genetics, Vrije Universiteit Brussel, Brussels, Belgium
| | - S Soini
- Helsinki Biobank, Helsinki University Central Hospital, Helsinki, Finland
| | - A P A van Montfoort
- IVF Laboratory, Department of Obstetrics & Gynaecology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - A Veiga
- Barcelona Stem Cell Bank, Centre of Regenerative Medicine in Barcelona, Hospital Duran i Reynals, Barcelona, Spain
- Reproductive Medicine Service of Dexeus Woman Health, Barcelona, Spain
| | - J R Vermeesch
- Department of Human Genetics, KU Leuven, Leuven, Belgium
| | - S Viville
- Institute of Parasitology and Pathology, University of Strasbourg, Strasbourg, France
- Laboratory of Genetic Diagnostics, UF3472-Genetics of Infertility, Nouvel Hôpital Civil, Strasbourg, France
| | - M Macek
- Department of Biology and Medical Genetics, Charles University-2nd Faculty of Medicine and Motol University Hospital, Prague, Czech Republic.
| |
Collapse
|
55
|
Hanson BM, Eisenberg ML, Hotaling JM. Male infertility: a biomarker of individual and familial cancer risk. Fertil Steril 2018; 109:6-19. [DOI: 10.1016/j.fertnstert.2017.11.005] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 10/15/2017] [Accepted: 11/07/2017] [Indexed: 12/13/2022]
|
56
|
Harper JC, Aittomäki K, Borry P, Cornel MC, de Wert G, Dondorp W, Geraedts J, Gianaroli L, Ketterson K, Liebaers I, Lundin K, Mertes H, Morris M, Pennings G, Sermon K, Spits C, Soini S, van Montfoort APA, Veiga A, Vermeesch JR, Viville S, Macek M. Recent developments in genetics and medically-assisted reproduction: from research to clinical applications †‡. Hum Reprod Open 2017; 2017:hox015. [PMID: 31486804 PMCID: PMC6276693 DOI: 10.1093/hropen/hox015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 11/14/2017] [Indexed: 12/13/2022] Open
Abstract
Two leading European professional societies, the European Society of Human Genetics and the European Society for Human Reproduction and Embryology, have worked together since 2004 to evaluate the impact of fast research advances at the interface of assisted reproduction and genetics, including their application into clinical practice. In September 2016, the expert panel met for the third time. The topics discussed highlighted important issues covering the impacts of expanded carrier screening, direct-to-consumer genetic testing, voiding of the presumed anonymity of gamete donors by advanced genetic testing, advances in the research of genetic causes underlying male and female infertility, utilisation of massively-parallel sequencing in preimplantation genetic testing and non-invasive prenatal screening, mitochondrial replacement in human oocytes, and additionally, issues related to cross-generational epigenetic inheritance following IVF and germline genome editing. The resulting paper represents a consensus of both professional societies involved.
Collapse
Affiliation(s)
- J C Harper
- Institute for Women's Health, University College London, 86-96 Chenies Mews, London WC1E 6HX, UK
| | - K Aittomäki
- Laboratory of Genetics, Helsinki University Hospital, PO Box 720, FI-00029, Helsinki, Finland
| | - P Borry
- Department of Public Health and Primary Care, Centre for Biomedical Ethics and Law, KU Leuven, Kapucijnenvoer 35 - Box 7001. B-3000, Leuven Belgium
| | - M C Cornel
- Department of Clinical Genetics, Amsterdam Public Health Research Institute, VU University Medical Center, PO Box 7057, 1007 MB, Amsterdam, The Netherlands
| | - G de Wert
- Department of Health, Ethics and Society, Research Schools CAPHRI and GROW, Maastricht University, De Byeplein 1, 6229 HA Maastricht, The Netherlands
| | - W Dondorp
- Department of Health, Ethics and Society, Research Schools CAPHRI and GROW, Maastricht University, De Byeplein 1, 6229 HA Maastricht, The Netherlands
| | - J Geraedts
- Department Genetics and Cell Biology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Center, P.O. Box 616, 6200 MD Maastricht, The Netherlands
| | - L Gianaroli
- S.I.S.Me.R. Reproductive Medicine Unit, Via Mazzini 12, 40138 Bologna, Italy
| | - K Ketterson
- Althea Science, Inc., 3 Regent St #301, Livingston, NJ 07039, USA
| | - I Liebaers
- Centre for Medical Genetics, UZ Brussel, Laarbeeklaan 101, B-1090 Brussels, Belgium
- Research Group Reproduction and Genetics, Vrije Universiteit Brussel, Laarbeeklaan 101, B-1090, Brussels, Belgium
| | - K Lundin
- Reproductive Medicine, Sahlgrenska University Hospital, Blå Stråket 6, 413 45, Göteborg, Sweden
| | - H Mertes
- Bioethics Institute Ghent, Department of Philosophy and Moral Science, Ghent University, Belgium
| | - M Morris
- Synlab Genetics, chemin d'Entre-Bois 21, CH-1018, Lausanne, Switzerland
| | - G Pennings
- Bioethics Institute Ghent, Department of Philosophy and Moral Science, Ghent University, Belgium
| | - K Sermon
- Research Group Reproduction and Genetics, Vrije Universiteit Brussel, Laarbeeklaan 101, B-1090, Brussels, Belgium
| | - C Spits
- Research Group Reproduction and Genetics, Vrije Universiteit Brussel, Laarbeeklaan 101, B-1090, Brussels, Belgium
| | - S Soini
- Helsinki Biobank, Helsinki University Central Hospital, Haartmaninkatu 3, PO Box 400, 00029 HUS, Helsinki, Finland
| | - A P A van Montfoort
- IVF laboratory, Department of Obstetrics and Gynaecology, Maastricht University Medical Center, PO Box 5800, 6202 AZ Maastricht, The Netherlands
| | - A Veiga
- Barcelona Stem Cell Bank, Centre of Regenerative Medicine in Barcelona, Hospital Duran i Reynals, Gran Via de l' Hospitalet 199, 08908, Hospitalet de Llobregat, Barcelona, Spain
- Reproductive Medicine Service of Dexeus Woman Health, Gran Via Carles III, 71-75 - 08028 Barcelona, Spain
| | - J R Vermeesch
- Department of Human Genetics, KU Leuven, O&N I Herestraat 49 - Box 602, B-3000 Leuven, Belgium
| | - S Viville
- Institute of Parasitology and Pathology, University of Strasbourg, 3 rue Koberlé, 67000 Strasbourg, France
- Laboratory of Genetic Diagnostics, UF3472-Genetics of Infertility, Nouvel Hôpital Civil, 1 place de l'Hôpital, 67091 Strasbourg cedex, France
| | - M Macek
- Department of Biology and Medical Genetics, Charles University 2nd Faculty of Medicine and Motol University Hospital, V Úvalu 84, Prague CZ-15006, Czech Republic
| |
Collapse
|
57
|
Wedenoja S, Khamaysi A, Shimshilashvili L, Anbtawe-Jomaa S, Elomaa O, Toppari J, Höglund P, Aittomäki K, Holmberg C, Hovatta O, Tapanainen JS, Ohana E, Kere J. A missense mutation in SLC26A3 is associated with human male subfertility and impaired activation of CFTR. Sci Rep 2017; 7:14208. [PMID: 29079751 PMCID: PMC5660164 DOI: 10.1038/s41598-017-14606-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 10/09/2017] [Indexed: 12/21/2022] Open
Abstract
Chloride absorption and bicarbonate excretion through exchange by the solute carrier family 26 member 3 (SLC26A3) and cystic fibrosis transmembrane conductance regulator (CFTR) are crucial for many tissues including sperm and epithelia of the male reproductive tract. Homozygous SLC26A3 mutations cause congenital chloride diarrhea with male subfertility, while homozygous CFTR mutations cause cystic fibrosis with male infertility. Some homozygous or heterozygous CFTR mutations only manifest as male infertility. Accordingly, we studied the influence of SLC26A3 on idiopathic infertility by sequencing exons of SLC26A3 in 283 infertile and 211 control men. A heterozygous mutation c.2062 G > C (p.Asp688His) appeared in nine (3.2%) infertile men, and additionally, in two (0.9%) control men, whose samples revealed a sperm motility defect. The p.Asp688His mutation is localized in the CFTR-interacting STAS domain of SLC26A3 and enriched in Finland, showing a significant association with male infertility in comparison with 6,572 Finnish (P < 0.05) and over 120,000 global alleles (P < 0.0001) (ExAC database). Functional studies showed that while SLC26A3 is a strong activator of CFTR-dependent anion transport, SLC26A3-p.Asp688His mutant retains normal Cl−/HCO3− exchange activity but suppresses CFTR, despite unaffected domain binding and expression. These results suggest a novel mechanism for human male infertility─impaired anion transport by the coupled SLC26A3 and CFTR.
Collapse
Affiliation(s)
- Satu Wedenoja
- Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, FI-00014, Helsinki, Finland.
| | - Ahlam Khamaysi
- Department of Clinical Biochemistry and Pharmacology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Liana Shimshilashvili
- Department of Clinical Biochemistry and Pharmacology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Shireen Anbtawe-Jomaa
- Department of Clinical Biochemistry and Pharmacology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Outi Elomaa
- Folkhälsan Institute of Genetics, and Molecular Neurology Research Program, University of Helsinki, FI-00014, Helsinki, Finland
| | - Jorma Toppari
- Department of Physiology, Institute of Biomedicine, University of Turku, and Department of Pediatrics, Turku University Hospital, FI-20014, Turku, Finland
| | - Pia Höglund
- City of Kauniainen, Health Care Services, FI-02700, Kauniainen, Finland
| | - Kristiina Aittomäki
- HUSLAB, Laboratory of Genetics, Helsinki University Hospital, and Genome-Scale Biology research program, University of Helsinki, FI-00029, Helsinki, Finland
| | - Christer Holmberg
- Hospital for Children and Adolescents, University of Helsinki and Helsinki University Hospital, FI-00014, Helsinki, Finland
| | - Outi Hovatta
- Department of Clinical Science, Karolinska Institutet, SE-17177, Stockholm, Sweden
| | - Juha S Tapanainen
- Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, FI-00014, Helsinki, Finland.,Obstetrics and Gynecology, University of Oulu and Oulu University Hospital, FI-90220, Oulu, Finland
| | - Ehud Ohana
- Department of Clinical Biochemistry and Pharmacology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
| | - Juha Kere
- Folkhälsan Institute of Genetics, and Molecular Neurology Research Program, University of Helsinki, FI-00014, Helsinki, Finland.,Department of Biosciences and Nutrition, Karolinska Institutet, SE-14183, Huddinge, Sweden.,Department of Medical & Molecular Genetics, King's College London, London, SE1 9RT, England
| |
Collapse
|
58
|
Mapping allele with resolved carrier status of Robertsonian and reciprocal translocation in human preimplantation embryos. Proc Natl Acad Sci U S A 2017; 114:E8695-E8702. [PMID: 28973897 DOI: 10.1073/pnas.1715053114] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Reciprocal translocations (RecT) and Robertsonian translocations (RobT) are among the most common chromosomal abnormalities that cause infertility and birth defects. Preimplantation genetic testing for aneuploidy using comprehensive chromosome screening for in vitro fertilization enables embryo selection with balanced chromosomal ploidy; however, it is normally unable to determine whether an embryo is a translocation carrier. Here we report a method named "Mapping Allele with Resolved Carrier Status" (MaReCs), which enables chromosomal ploidy screening and resolution of the translocation carrier status of the same embryo. We performed MaReCs on 108 embryos, of which 96 were from 13 RecT carriers and 12 were from three RobT carriers. Thirteen of the sixteen patients had at least one diploid embryo. We have confirmed the accuracy of our carrier status determination in amniotic fluid karyotyping of seven cases as well as in the live birth we have thus far. Therefore, MaReCs accurately enables the selection of translocation-free embryos from patients carrying chromosomal translocations. We expect MaReCs will help reduce the propagation of RecT/RobT in the human population.
Collapse
|
59
|
Aftabi Y, Hosseinzadeh Colagar A, Mehrnejad F, Seyedrezazadeh E, Moudi E. Aryl hydrocarbon receptor gene transitions (c.-742C>T; c.1661G>A) and idiopathic male infertility: a case-control study with in silico and meta-analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:20599-20615. [PMID: 28712079 DOI: 10.1007/s11356-017-9701-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 07/04/2017] [Indexed: 06/07/2023]
Abstract
Aryl hydrocarbon receptor (AHR) is responsible for crucial events in male reproductive biology. Here, the association of the AHR transitions c.-742C>T and c.1661G>A with idiopathic male infertility was investigated in a case-control study, which is followed by a meta-analysis and a bioinformatic investigation. Blood and semen samples were obtained from a total of 135 idiopathic infertile men and 130 healthy controls. Participants were genotyped for the transitions using a PCR-RFLP method. A meta-analysis of five sets of data evaluated the association of c.1661G>A with male infertility, and using an in silico analysis, the possible molecular effects of the transitions predicted. Genotypes and alleles of AHR-c.-742C>T and c.1661G>A polymorphisms were not associated with the risk of male infertility significantly. However, the frequency of C/A haplotype was significantly associated with the increased risk of male infertility, and T/A haplotype was higher among controls significantly. Also, the frequencies of combined genotypes CT/GG, CT/GA and TT/GG were significantly associated with decreased risk of infertility. And, the meta-analysis showed that the AA versus GA/GG recessive model is associated with decreased risk of male infertility among the Iranian population. In silico analysis predicted that c.-742C>T does not alter the binding sites of the proposed transcription factors, but c.1661G>A poses a tolerable structural disturbance in AHR protein. In conclusion, these results showed that AHR c.-742C>T and c.1661G>A transitions separately could not be nominated as a risk or protective factor for male infertility. However, some combined models could affect infertility risk, especially among Iranian men.
Collapse
Affiliation(s)
- Younes Aftabi
- Department of Molecular and Cell Biology, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Mazandaran, Post Code: 47416-95447, Iran
| | - Abasalt Hosseinzadeh Colagar
- Department of Molecular and Cell Biology, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Mazandaran, Post Code: 47416-95447, Iran.
| | - Faramarz Mehrnejad
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, P.O. Box: 14395-1561, Tehran, Iran
| | - Ensiyeh Seyedrezazadeh
- Tuberculosis and Lung Disease Research Center, Tabriz University of Medical Sciences, P.O. Box: 53714-161, Tabriz, Iran
| | - Emadoddin Moudi
- Department of Urology, Babol University of Medical Sciences, P.O. Box: 47745-47176, Babol, Iran
| |
Collapse
|
60
|
Pan Y, Zhang HG, Xi QI, Zhang H, Wang RX, Li LL, Liu RZ. Molecular microdeletion analysis of infertile men with karyotypic Y chromosome abnormalities. J Int Med Res 2017; 46:307-315. [PMID: 28835195 PMCID: PMC6011318 DOI: 10.1177/0300060517719394] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Objectives To investigate azoospermic factor (AZF) microdeletions in infertile men from northeastern China with karyotypic Y chromosome abnormalities. Methods G-banding of metaphase chromosomes and karyotype analysis were performed in all infertile male patients. Genomic DNA was isolated and used to analyze classical AZF microdeletions by PCR. The regions and sequence-tagged sites of AZFa (SY86, SY84), AZFb (SY127, SY134, SY143), and AZFc (SY152, SY254, SY255, SY157) were sequenced by multiplex PCR. Results A total of 190 Y chromosome abnormality carriers were found, of whom 35 had AZF microdeletions. These were most common in 46,X,Yqh− patients, followed by 45,X/46,XY patients. Most microdeletions were detected in the AZFb + c region, including 48.57% of all AZF microdeletion cases. AZF partial deletions were also seen in these patients. Overall, AZF microdeletions were detected in 38.5% Y chromosome abnormality carriers, and most were observed in 46,X,Yqh− individuals. Loss of SY152 was seen in all 35 patients, with SY254/SY255 detected in 34 of 35 patients. Conclusions AZF microdeletions were detected in 38.5% of Y chromosome abnormality carriers. This indicates that AZF microdeletion screening is advisable for individuals with karyotypic Y chromosome abnormalities.
Collapse
Affiliation(s)
- Yuan Pan
- Center for Reproductive Medicine and Center for Prenatal Diagnosis, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Hong-Guo Zhang
- Center for Reproductive Medicine and Center for Prenatal Diagnosis, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Q I Xi
- Center for Reproductive Medicine and Center for Prenatal Diagnosis, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Han Zhang
- Center for Reproductive Medicine and Center for Prenatal Diagnosis, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Rui-Xue Wang
- Center for Reproductive Medicine and Center for Prenatal Diagnosis, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Lei-Lei Li
- Center for Reproductive Medicine and Center for Prenatal Diagnosis, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Rui-Zhi Liu
- Center for Reproductive Medicine and Center for Prenatal Diagnosis, The First Hospital of Jilin University, Changchun, Jilin, China
| |
Collapse
|
61
|
Xie C, Chen X, Liu Y, Wu Z, Ping P. Multicenter study of genetic abnormalities associated with severe oligospermia and non-obstructive azoospermia. J Int Med Res 2017; 46:107-114. [PMID: 28730893 PMCID: PMC6011285 DOI: 10.1177/0300060517718771] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Objective Chong Xie, Xiangfeng Chen, and Yulin Liu contributed equally to this work. Genetic defects are identified in nearly 20% of infertile males. Determining the frequency and types of major genetic abnormalities in severe male infertility helps inform appropriate genetic counseling before assisted reproductive techniques.
Methods Cytogenetic results of 912 patients with non-obstructive azoospermia (NOA) and severe oligozoospermia (SOS) in Eastern China were reviewed in this multicenter study from January 2011 to December 2015. Controls were 215 normozoospermic men with offspring. Results Among all patients, 22.6% (206/912) had genetic abnormalities, including 27.3% (146/534) of NOA patients and 15.9% (60/378) of SOS patients. Chromosomal abnormalities (all autosomal) were detected in only 1.9% (4 /215) of controls. In NOA patients, sex chromosomal abnormalities were identified in 25.8% (138/534), of which 8% (43/534) had a 47,XXY karyotype or its mosaic; higher than the SOS group prevalence (1.1%; 4/378). The incidence of Y chromosome microdeletions was lower in the SOS group (13.2%; 50/378) than in the NOA group (17.8%; 95/534). Conclusions The high prevalence of genetic abnormalities in our study indicates the importance of routine genetic testing in severe male infertility diagnosis. This may help determine the choice of assisted reproductive technique and allow specific pre-implantation genetic testing to minimize the risk of transmitting genetic defects.
Collapse
Affiliation(s)
- Chong Xie
- 1 Assisted Reproductive Center, International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiangfeng Chen
- 2 Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Human Sperm Bank, Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Yulin Liu
- 3 Shanghai Ji Ai Genetic and IVF Institute, Shanghai, China
| | - Zhengmu Wu
- 1 Assisted Reproductive Center, International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ping Ping
- 1 Assisted Reproductive Center, International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| |
Collapse
|
62
|
Tournaye H, Krausz C, Oates RD. Concepts in diagnosis and therapy for male reproductive impairment. Lancet Diabetes Endocrinol 2017; 5:554-564. [PMID: 27395770 DOI: 10.1016/s2213-8587(16)30043-2] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 04/08/2016] [Indexed: 12/13/2022]
Abstract
An accurate medical history and directed physical examination are essential in diagnosis of male infertility. We review the hormonal assessments and specific genetic analyses that are useful additional tests, and detail other evidence-based examinations that are available to help guide therapeutic strategies. By contrast with female infertility treatments-especially hormonal manipulations to stimulate or enhance oocyte production-spermatogenesis and sperm quality abnormalities are much more difficult to affect positively. In general, a healthy lifestyle can improve sperm quality. A few men have conditions in which evidence-based therapies can increase their chances for natural conception. In this second of two papers in The Lancet Diabetes and Endocrinology Series on male reproductive impairment, we examine the agreements and controversies that surround several of these conditions. When we are not able to cure, correct, or mitigate the cause of conditions such as severe oligozoospermia, non-remedial ductal obstruction, and absence of sperm fertilising ability, assisted reproductive technologies, such as in-vitro fertilisation (IVF) with intracytoplasmic sperm injection (ICSI), can be used as an adjunctive measure to allow for biological paternity. Not considered possible just two decades ago, azoospermia due to testicular failure, including 47,XXY (Klinefelter syndrome), is now treatable in approximately 50% of cases when combining surgical harvesting of testicular sperm and ICSI. Although genetic fatherhood is now possible for many men previously considered sterile, it is crucial to discover and abrogate causes as best possible, provide reliable and evidenced-based therapy, consider seriously the health and wellness of any offspring conceived, and always view infertility as a possible symptom of a more general or constitutional disease.
Collapse
Affiliation(s)
- Herman Tournaye
- Centre for Reproductive Medicine, University Hospital of the Free University Brussels, Brussels, Belgium.
| | - Csilla Krausz
- Sexual Medicine and Andrology Unit, Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
| | - Robert D Oates
- Department of Urology, Boston University School of Medicine, Boston, MA, USA
| |
Collapse
|
63
|
Okutman O, Muller J, Skory V, Garnier JM, Gaucherot A, Baert Y, Lamour V, Serdarogullari M, Gultomruk M, Röpke A, Kliesch S, Herbepin V, Aknin I, Benkhalifa M, Teletin M, Bakircioglu E, Goossens E, Charlet-Berguerand N, Bahceci M, Tüttelmann F, Viville ST. A no-stop mutation in MAGEB4 is a possible cause of rare X-linked azoospermia and oligozoospermia in a consanguineous Turkish family. J Assist Reprod Genet 2017; 34:683-694. [PMID: 28401488 DOI: 10.1007/s10815-017-0900-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 03/01/2017] [Indexed: 11/25/2022] Open
Abstract
PURPOSE The purpose of this study was to identify mutations that cause non-syndromic male infertility using whole exome sequencing of family cases. METHODS We recruited a consanguineous Turkish family comprising nine siblings with male triplets; two of the triplets were infertile as well as one younger infertile brother. Whole exome sequencing (WES) performed on two azoospermic brothers identified a mutation in the melanoma antigen family B4 (MAGEB4) gene which was confirmed via Sanger sequencing and then screened for on control groups and unrelated infertile subjects. The effect of the mutation on messenger RNA (mRNA) and protein levels was tested after in vitro cell transfection. Structural features of MAGEB4 were predicted throughout the conserved MAGE domain. RESULTS The novel single-base substitution (c.1041A>T) in the X-linked MAGEB4 gene was identified as a no-stop mutation. The mutation is predicted to add 24 amino acids to the C-terminus of MAGEB4. Our functional studies were unable to detect any effect either on mRNA stability, intracellular localization of the protein, or the ability to homodimerize/heterodimerize with other MAGE proteins. We thus hypothesize that these additional amino acids may affect the proper protein interactions with MAGEB4 partners. CONCLUSION The whole exome analysis of a consanguineous Turkish family revealed MAGEB4 as a possible new X-linked cause of inherited male infertility. This study provides the first clue to the physiological function of a MAGE protein.
Collapse
Affiliation(s)
- Ozlem Okutman
- Département Génomique Fonctionnelle et Cancer, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de Santé et de Recherche Médicale (INSERM) U964/Centre National de Recherche Scientifique (CNRS) UMR 7104, Université de Strasbourg, 67404, Illkirch, France
- Institut de Parasitologie et Pathologie Tropicale, EA 7292, Fédération de Médecine Translationelle, Université de Strasbourg, 3 rue Koeberlé, 67000, Strasbourg, France
- Laboratoire de Diagnostic Génétique, UF3472-génétique de l'infertilité, Hôpitaux Universitaires de Strasbourg, 67000, Strasbourg, France
| | - Jean Muller
- Laboratoire de Diagnostic Génétique, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
- Laboratoire de Génétique Médicale, INSERM U1112, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg, Strasbourg, France
| | - Valerie Skory
- Département Génomique Fonctionnelle et Cancer, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de Santé et de Recherche Médicale (INSERM) U964/Centre National de Recherche Scientifique (CNRS) UMR 7104, Université de Strasbourg, 67404, Illkirch, France
| | - Jean Marie Garnier
- Biologie du développement et cellules souches, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de Santé et de Recherche Médicale (INSERM) U964/Centre National de Recherche Scientifique (CNRS) UMR 7104, Université de Strasbourg, 67404, Illkirch, France
| | - Angeline Gaucherot
- Médecine translationnelle et neurogénétique, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de Santé et de Recherche Médicale (INSERM) U964/Centre National de Recherche Scientifique (CNRS) UMR 7104, Université de Strasbourg, 67404, Illkirch, France
| | - Yoni Baert
- Biology of the Testis, Research Laboratory for Reproduction, Genetics and Regenerative Medicine, Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, 1090, Brussels, Belgium
| | - Valérie Lamour
- Département Biologie structurale intégrative, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de Santé et de Recherche Médicale (INSERM) U964/Centre National de Recherche Scientifique (CNRS) UMR 7104, Université de Strasbourg, 67404, Illkirch, France
| | | | | | - Albrecht Röpke
- Institute of Human Genetics, University of Münster, Münster, Germany
| | - Sabine Kliesch
- Centre of Reproductive Medicine and Andrology, University of Münster, Münster, Germany
| | | | - Isabelle Aknin
- Reproductive Biology Unit, CHU-Hôpital Nord, Saint-Etienne, France
| | - Moncef Benkhalifa
- Médecine de la Reproduction et Cytogénétique Médicale CHU et Faculté de Médecine, Université de Picardie Jules Verne, 80000, Amiens, France
| | - Marius Teletin
- Département Génomique Fonctionnelle et Cancer, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de Santé et de Recherche Médicale (INSERM) U964/Centre National de Recherche Scientifique (CNRS) UMR 7104, Université de Strasbourg, 67404, Illkirch, France
| | | | - Ellen Goossens
- Biology of the Testis, Research Laboratory for Reproduction, Genetics and Regenerative Medicine, Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, 1090, Brussels, Belgium
| | - Nicolas Charlet-Berguerand
- Médecine translationnelle et neurogénétique, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de Santé et de Recherche Médicale (INSERM) U964/Centre National de Recherche Scientifique (CNRS) UMR 7104, Université de Strasbourg, 67404, Illkirch, France
| | | | - Frank Tüttelmann
- Institute of Human Genetics, University of Münster, Münster, Germany
| | - STéphane Viville
- Département Génomique Fonctionnelle et Cancer, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Institut National de Santé et de Recherche Médicale (INSERM) U964/Centre National de Recherche Scientifique (CNRS) UMR 7104, Université de Strasbourg, 67404, Illkirch, France.
- Institut de Parasitologie et Pathologie Tropicale, EA 7292, Fédération de Médecine Translationelle, Université de Strasbourg, 3 rue Koeberlé, 67000, Strasbourg, France.
- Laboratoire de Diagnostic Génétique, UF3472-génétique de l'infertilité, Hôpitaux Universitaires de Strasbourg, 67000, Strasbourg, France.
- Laboratoire de diagnostic génétique, UF3472-génétique de l'infertilité, Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg, 1 place de l'Hôpital, 67091, Strasbourg cedex, France.
| |
Collapse
|
64
|
Marques PI, Fernandes S, Carvalho F, Barros A, Sousa M, Marques CJ. DNA methylation imprinting errors in spermatogenic cells from maturation arrest azoospermic patients. Andrology 2017; 5:451-459. [PMID: 28296202 DOI: 10.1111/andr.12329] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/12/2016] [Accepted: 12/16/2016] [Indexed: 11/30/2022]
Abstract
Imprinting errors have been described in spermatozoa from infertile patients with oligozoospermia and azoospermia. However, little is known about methylation of imprinted genes in other spermatogenic cells from azoospermic patients. Therefore, we aimed to evaluate the methylation status of single CpGs located in the differentially methylated regions (DMRs) of two imprinted genes, one paternally (H19) and one maternally (MEST) methylated, in primary spermatocytes of azoospermic patients presenting complete (MAc, n = 7) and incomplete (MAi, n = 8) maturation arrest, as well as in other spermatogenic cells from MAi patients that presented focus of complete spermatogenesis in some seminiferous tubules. We observed H19 imprinting errors in primary spermatocytes from one MAi patient and MEST imprinting errors in one MAi and two MAc patients. Additionally, H19 imprinting errors were observed in elongated spermatids/spermatozoa from one MAi patient. Nevertheless, no statistical differences were found for H19 and MEST global methylation levels (percentage of methylated and unmethylated CpGs, respectively) between patients with complete and incomplete MA and also between MA groups and a control group. These results provide further evidence that imprinting errors occur in spermatogenic cells from patients presenting impaired spermatogenesis, as we and others have previously described in ejaculated and testicular spermatozoa. As paternal imprinting errors can be transmitted to the embryo by the sperm cell, they can provide a possible explanation for poor embryo development and/or low pregnancy rates as correct expression of imprinted genes is crucial for embryo and placental development and function. Therefore, in cases with male factor infertility where unsuccessful in vitro fertilization (IVF) treatments are recurrent, analysis of imprinting marks in spermatozoa might be a useful diagnostic tool.
Collapse
Affiliation(s)
- P I Marques
- Department of Genetics, Faculty of Medicine, University of Porto, Porto, Portugal.,I3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
| | - S Fernandes
- Department of Genetics, Faculty of Medicine, University of Porto, Porto, Portugal.,I3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
| | - F Carvalho
- Department of Genetics, Faculty of Medicine, University of Porto, Porto, Portugal.,I3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
| | - A Barros
- Department of Genetics, Faculty of Medicine, University of Porto, Porto, Portugal.,I3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Centre for Reproductive Genetics A Barros, Porto, Portugal
| | - M Sousa
- Centre for Reproductive Genetics A Barros, Porto, Portugal.,Department of Microscopy, Laboratory of Cell Biology, Multidisciplinary Unit for Biomedical Research-UMIB, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - C J Marques
- Department of Genetics, Faculty of Medicine, University of Porto, Porto, Portugal.,I3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
| |
Collapse
|
65
|
Abstract
Genome editing allows for the versatile genetic modification of somatic cells, germ cells and embryos. In particular, CRISPR/Cas9 is worldwide used in biomedical research. Although the first report on Cas9-mediated gene modification in human embryos focused on the prevention of a genetic disease in offspring, it raised profound ethical and social concerns over the safety of subsequent generations and the potential misuse of genome editing for human enhancement. The present article considers germ line genome editing approaches from various clinical and ethical viewpoints and explores its objectives. The risks and benefits of the following three likely objectives are assessed: the prevention of monogenic diseases, personalized assisted reproductive technology (ART) and genetic enhancement. Although genetic enhancement should be avoided, the international regulatory landscape suggests the inevitability of this misuse at ART centers. Under these circumstances, possible regulatory responses and the potential roles of public dialogue are discussed.
Collapse
|
66
|
Liu W, Gao X, Ma G, Yan L, Chen T, Li T, Yu RM, Ma JL. Correlation of genetic results with testicular histology, hormones and sperm retrieval in nonobstructive azoospermia patients with testis biopsy. Andrologia 2016; 49. [PMID: 27921326 DOI: 10.1111/and.12705] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/21/2016] [Indexed: 11/29/2022] Open
Abstract
To investigate the frequency and types of genetic results in different testicular histology of patients with nonobstructive azoospermia (NOA), and correlated with hormones and sperm retrieval (SR), a retrospective study was conducted in 286 Chinese NOA patients who underwent testis biopsy and 100 age-matched fertile men as the control group. Chromosome karyotype analyses were performed by the peripheral blood chromosome G-band detection method. Screening of Y chromosome microdeletions of azoospermia factor (AZF) region was performed by polymerase chain reaction (PCR) amplification of 11 sequence-tagged sites (STS). The serum levels of follicle-stimulating hormone, luteinising hormone and testosterone (T) and the appearance of scrotal ultrasound were also obtained. In 286 cases of NOA, 14.3% were found to have chromosomal alterations. The incidence of chromosomal abnormality was 2.8%. Sex chromosomal abnormalities were seen in six cases (four cases of Klinefelter's syndrome (47, XXY) and two cases of mosaics). The incidence of polymorphic chromosomal variants was 3% in the normal group and 11.5% in the NOA group. In total, 15.7% of NOA patients were found to have AZF microdeletions and AZF (c + d) was the most frequent one. The results of hormone and SR were found to be significantly different among all testicular histological types, whereas no significant differences were found when it comes to genetic alterations. It is concluded that the rate of cytogenetic alterations was high in NOA patients. So screening for chromosomal alterations and AZF microdeletions would add useful information for genetic counselling in NOA patients with testis biopsy and avoid vertical transmission of genetic defects by assisted reproductive technology.
Collapse
Affiliation(s)
- W Liu
- Center for Reproductive Medicine, Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University) Ministry of Education, Jinan, China
| | - X Gao
- Center for Reproductive Medicine, Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University) Ministry of Education, Jinan, China
| | - G Ma
- Center for Reproductive Medicine, Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University) Ministry of Education, Jinan, China
| | - L Yan
- Center for Reproductive Medicine, Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University) Ministry of Education, Jinan, China
| | - T Chen
- Center for Reproductive Medicine, Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University) Ministry of Education, Jinan, China
| | - T Li
- Center for Reproductive Medicine, Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University) Ministry of Education, Jinan, China
| | - R-M Yu
- Center for Reproductive Medicine, Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University) Ministry of Education, Jinan, China
| | - J-L Ma
- Center for Reproductive Medicine, Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University) Ministry of Education, Jinan, China
| |
Collapse
|
67
|
Olesen IA, Andersson AM, Aksglaede L, Skakkebaek NE, Rajpert-de Meyts E, Joergensen N, Juul A. Clinical, genetic, biochemical, and testicular biopsy findings among 1,213 men evaluated for infertility. Fertil Steril 2016; 107:74-82.e7. [PMID: 27793385 DOI: 10.1016/j.fertnstert.2016.09.015] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 09/09/2016] [Accepted: 09/09/2016] [Indexed: 12/18/2022]
Abstract
OBJECTIVE To study the pathologic findings among men evaluated for infertility. DESIGN A retrospective, single-center, cross-sectional study. SETTING University hospital-based research center. PARTICIPANT(S) We included data from 1,213 medical records from infertile men referred for diagnostic work-up from 2005 to 2009. INTERVENTIONS(S) None. MAIN OUTCOME MEASURE(S) Health history, clinical findings, chromosome/genetic aberrations, semen quality, reproductive hormones. RESULT(S) In total, 64.4% of the infertile men had one or more reproductive disorders or factors influencing fertility, leaving 35.6% diagnosed as idiopathic infertile. In 244 patients (20%), including seven cases of testicular cancer and/or germ cell neoplasia in situ, a pathologic finding was first detected during diagnostic work-up. Two hundred four patients (16.8%) had a history of cryptorchidism and 154 (12.7%) of varicocele (grade 2 and 3). Thirty-three patients had chromosomal abnormalities, including 16 with sex chromosome abnormalities (11 with 47,XXY). Y-chromosome microdeletions were detected in 65 patients (5.4%). One hundred thirty-three had azoospermia, of which 58 had testicular biopsy findings (Sertoli cell-only syndrome: n = 23; spermatogenic arrest: n = 7; impaired spermatogenesis and atrophy: n = 28). Additionally, in idiopathic infertile men and infertile men with additional symptoms of testicular dysgenesis syndrome, 22.5% presented with a degree of Leydig cell insufficiency, with the highest frequency (33.1%) among patients with sperm concentration <5 million/mL. CONCLUSION(S) We report pathologic findings that could explain the male-factor infertility in two-thirds of infertile men referred to our center. Thus, male infertility may be a sign of an underlying disease that warrants attention.
Collapse
Affiliation(s)
- Inge Ahlmann Olesen
- Department of Growth and Reproduction, International Research and Research Training Center in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
| | - Anna-Maria Andersson
- Department of Growth and Reproduction, International Research and Research Training Center in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Lise Aksglaede
- Department of Clinical Genetics, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Niels Erik Skakkebaek
- Department of Growth and Reproduction, International Research and Research Training Center in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Ewa Rajpert-de Meyts
- Department of Growth and Reproduction, International Research and Research Training Center in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Niels Joergensen
- Department of Growth and Reproduction, International Research and Research Training Center in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Anders Juul
- Department of Growth and Reproduction, International Research and Research Training Center in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| |
Collapse
|
68
|
Aboulmaouahib S, Madkour A, Kaarouch I, Saadani B, Sefrioui O, Louanjli N, Copin H, Cadi R, Benkhalifa M. Effect of semen preparation technique and its incubation on sperm quality in the Moroccan population. Andrologia 2016; 49. [DOI: 10.1111/and.12688] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/25/2016] [Indexed: 02/02/2023] Open
Affiliation(s)
- S. Aboulmaouahib
- Laboratoire de Physiologie et Génétique Moléculaire (PGM); Département de Biologie; Faculté des Sciences Ain Chock; Université HASSAN II; Casablanca Morocco
- Labomac IVF Centers and Clinical Laboratory Medicine; Casablanca Morocco
| | - A. Madkour
- Labomac IVF Centers and Clinical Laboratory Medicine; Casablanca Morocco
- Biochemistry and Immunology Laboratory; Faculty of Sciences; Mohammed V University; Rabat Morocco
- Place de Nid Aux Iris; Clinique des Iris; IVF Center IRIFIV; Casablanca Morocco
- Private Clinic of Human Reproduction and Endoscopic Surgery; Anfa Fertility Center; Casablanca Morroco
| | - I. Kaarouch
- Labomac IVF Centers and Clinical Laboratory Medicine; Casablanca Morocco
- Biochemistry and Immunology Laboratory; Faculty of Sciences; Mohammed V University; Rabat Morocco
- Place de Nid Aux Iris; Clinique des Iris; IVF Center IRIFIV; Casablanca Morocco
- Private Clinic of Human Reproduction and Endoscopic Surgery; Anfa Fertility Center; Casablanca Morroco
| | - B. Saadani
- Place de Nid Aux Iris; Clinique des Iris; IVF Center IRIFIV; Casablanca Morocco
| | - O. Sefrioui
- Private Clinic of Human Reproduction and Endoscopic Surgery; Anfa Fertility Center; Casablanca Morroco
| | - N. Louanjli
- Labomac IVF Centers and Clinical Laboratory Medicine; Casablanca Morocco
| | - H. Copin
- Reproductive Biology and Medical Cytogenetics Laboratory; Regional University Hospital & School of Medicine; Picardie University Jules Verne; Amiens France
| | - R. Cadi
- Laboratoire de Physiologie et Génétique Moléculaire (PGM); Département de Biologie; Faculté des Sciences Ain Chock; Université HASSAN II; Casablanca Morocco
| | - M. Benkhalifa
- Reproductive Biology and Medical Cytogenetics Laboratory; Regional University Hospital & School of Medicine; Picardie University Jules Verne; Amiens France
| |
Collapse
|
69
|
Zhang YS, Li LL, Xue LT, Zhang H, Zhu YY, Liu RZ. Complete Azoospermia Factor b Deletion of Y Chromosome in an Infertile Male With Severe Oligoasthenozoospermia: Case Report and Literature Review. Urology 2016; 102:111-115. [PMID: 27473556 DOI: 10.1016/j.urology.2016.07.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 07/12/2016] [Accepted: 07/18/2016] [Indexed: 01/28/2023]
Abstract
OBJECTIVE To report on a male patient with complete deletion of azoospermia factor b (AZFb) who presented with severe oligoasthenozoospermia, but who successfully fathered a child via intracytoplasmic sperm injection (ICSI). MATERIALS AND METHODS Karyotype analysis of peripheral blood lymphocytes was performed by standard G-banding. Y chromosome microdeletions were detected by multiplex polymerase chain reaction amplification using AZF-specific, sequence-tagged site markers. The ICSI procedure was performed using ejaculated motile spermatozoa. RESULTS Cytogenetic analysis of the patient revealed a normal male karyotype, 46,XY. Multiplex polymerase chain reaction screening showed complete deletion of AZFb demonstrated by the absence of specific sequence-tagged site markers sY121, sY127, sY134, and sY143. Following successful ICSI, an ultrasound scan of the patient's partner revealed a single pregnancy with cardiac activity. A healthy boy was born by cesarean section at 38 weeks of gestation. Genetic testing 2 years later revealed that the infant had inherited his father's AZFb deletion. CONCLUSION Evidence from this case supports the fact that carriers of AZFb deletions can sometimes produce spermatozoa and father a son with the same AZFb deletion. This possibility reinforces the need for genetic counseling in patients with Y chromosome microdeletions.
Collapse
Affiliation(s)
- Yong-Sheng Zhang
- Centre for Reproductive Medicine, First Hospital of Jilin University, Changchun, China
| | - Lin-Lin Li
- Centre for Reproductive Medicine, First Hospital of Jilin University, Changchun, China
| | - Lin-Tao Xue
- Centre for Reproductive Medicine, First Hospital of Jilin University, Changchun, China; Reproductive Medicine and Genetic Centre, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Hao Zhang
- Centre for Reproductive Medicine, First Hospital of Jilin University, Changchun, China; Department of Genetics, Norman Bethune College of Medicine, Jilin University, Changchun, China
| | - Yue-Ying Zhu
- Centre for Reproductive Medicine, First Hospital of Jilin University, Changchun, China
| | - Rui-Zhi Liu
- Centre for Reproductive Medicine, First Hospital of Jilin University, Changchun, China.
| |
Collapse
|
70
|
Liška F, Chylíková B, Janků M, Šeda O, Vernerová Z, Pravenec M, Křen V. Splicing mutation in Sbf1 causes nonsyndromic male infertility in the rat. Reproduction 2016; 152:215-23. [PMID: 27335132 DOI: 10.1530/rep-16-0042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Accepted: 06/17/2016] [Indexed: 01/05/2023]
Abstract
In the inbred SHR/OlaIpcv rat colony, we identified males with small testicles and inability to reproduce. By selectively breeding their parents, we revealed the infertility to segregate as an autosomal recessive Mendelian character. No other phenotype was observed in males, and females were completely normal. By linkage using a backcross with Brown Norway strain, we mapped the locus to a 1.2Mbp segment on chromosome 7, harboring 35 genes. Sequencing of candidate genes revealed a G to A substitution in a canonical 'AG' splice site of intron 37 in Sbf1 (SET binding factor 1, alias myotubularin-related protein 5). This leads to either skipping exon 38 or shifting splicing one base downstream, invariantly resulting in frameshift, premature stop codon and truncation of the protein. Western blotting using two anti-Sbf1 antibodies revealed absence of the full-length protein in the mutant testis. Testicles of the mutant males were significantly smaller compared with SHR from 4weeks, peaked at 84% wild-type weight at 6weeks and declined afterward to 28%, reflecting massive germ cell loss. Histological examination revealed lower germ cell number; latest observed germ cell stage were round spermatids, resulting in the absence of sperm in the epididymis (azoospermia). SBF1 is a member of a phosphatase family lacking the catalytical activity. It probably modulates the activity of a phosphoinositol phosphatase MTMR2. Human homozygotes or compound heterozygotes for missense SBF1 mutations exhibit Charcot-Marie-Tooth disease (manifested mainly as progressive neuropathy), while a single mouse knockout reported in the literature identified male infertility as the only phenotype manifestation.
Collapse
Affiliation(s)
- František Liška
- Institute of Biology and Medical GeneticsFirst Faculty of Medicine, Charles University in Prague, Prague 2, Czech Republic
| | - Blanka Chylíková
- Institute of Biology and Medical GeneticsFirst Faculty of Medicine, Charles University in Prague, Prague 2, Czech Republic
| | - Michaela Janků
- Institute of Biology and Medical GeneticsFirst Faculty of Medicine, Charles University in Prague, Prague 2, Czech Republic
| | - Ondřej Šeda
- Institute of Biology and Medical GeneticsFirst Faculty of Medicine, Charles University in Prague, Prague 2, Czech Republic Laboratory of Rat Models of Metabolic DisordersDivision BIOCEV, Institute of Molecular Genetics of the Academy of Sciences of the Czech Republic, Prague 4, Czech Republic
| | - Zdeňka Vernerová
- Institute for the Care of the Mother and ChildThird Faculty of Medicine, Charles University in Prague, Prague 4, Czech Republic
| | - Michal Pravenec
- Institute of Biology and Medical GeneticsFirst Faculty of Medicine, Charles University in Prague, Prague 2, Czech Republic Institute of PhysiologyCzech Academy of Sciences, Prague 4, Czech Republic
| | - Vladimír Křen
- Institute of Biology and Medical GeneticsFirst Faculty of Medicine, Charles University in Prague, Prague 2, Czech Republic Institute of PhysiologyCzech Academy of Sciences, Prague 4, Czech Republic
| |
Collapse
|
71
|
Alchinbayev MK, Aralbayeva AN, Tuleyeva LN, Duysenbayeva SM, Makazhanov MA. Aneuploidies level in sperm nuclei in patients with infertility. Mutagenesis 2016; 31:559-65. [PMID: 27269280 DOI: 10.1093/mutage/gew020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Male infertility is a relevant social and medical problem. Male infertility is mostly caused by genetic disorders. The purpose of the study was to analyze the correlation of chromosome aberrations, as well as DNA fragmentation and various manifestations of spermatogenesis disorder. Sperm samples of 58 males with infertility and 23 conditionally healthy males were studied. All patients diagnosed with asthenozoospermia, teratozoospermia, oligoasthenozoospermia and oligoteratozoospermia underwent subsequent analysis of sperm DNA fragmentation. Sperm DNA fragmentation was examined with sperm chromatin dispersion test (sperm chromatin dispersion, Spermprocessor, India) with an Axioscope 40 fluorescent microscope. Fluorescence in situ hybridization with fluorescent probes (Vysis Multi Vysion PGT, Abbot Molecular) was used to study chromosome abnormalities in sperm nuclei with regard to X and Y chromosomes, as well as to chromosomes 18 and 21. It was found that the development of pathospermia was characterized by genetic discontinuity, which manifests as DNA fragmentation and disjunction of chromosomes in meiosis with spermatogenesis. It was also found that the prevailing type of pathospermia in men with infertility was oligozoospermia. In addition, this group also had the highest rate of numerical chromosome abnormalities. This was caused by the degeneration of spermatozoids with aneuploidies in chromosomes.
Collapse
|
72
|
Chylíková B, Hrdlička I, Veselá K, Řežábek K, Liška F. Recurrent Microdeletions at Xq27.3-Xq28 and Male Infertility: A Study in the Czech Population. PLoS One 2016; 11:e0156102. [PMID: 27257673 PMCID: PMC4892532 DOI: 10.1371/journal.pone.0156102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 05/08/2016] [Indexed: 12/02/2022] Open
Abstract
Background Genetic causes of male infertility are hypothesized to involve multiple types of mutations, from single gene defects to complex chromosome rearrangements. Recently, several recurrent X-chromosome microdeletions (located in subtelomeric region of the long arm) were reported to be associated with male infertility in Spanish and Italian males. The aim of our study was to test their prevalence and infertility association in population of men from the Czech Republic. Methods 107 males with pathological sperm evaluation resulting in nonobstructive infertility were compared to 131 males with normal fecundity. X-chromosome microdeletions were assessed by +/- PCR with three primer pairs for each region Xcnv64 (Xq27.3), Xcnv67 (Xq28) and Xcnv69 (Xq28). The latter microdeletion was further characterized by amplification across the deleted region, dividing the deletion into three types; A, B and C. Results We detected presence of isolated Xcnv64 deletion in 3 patients and 14 controls, and Xcnv69 in 3 patients and 6 controls (1 and 1 patient vs.4 and 1 control for types A and B respectively). There was one control with combined Xcnv64 and Xcnv69 type B deletions, and one patient with combination of Xcnv64 and Xcnv69 type C deletions. The frequency of the deletions was thus not higher in patient compared to control group, Xcnv64 was marginally associated with controls (adjusted Fisher´s exact test P = 0.043), Xcnv69 was not associated (P = 0.452). We excluded presence of more extensive rearrangements in two subjects with combined Xcnv64 and Xcnv69 deletions. There was no Xcnv67 deletion in our cohort. Conclusion In conclusion, the two previously reported X-linked microdeletions (Xcnv64 and Xcnv69) do not seem to confer a significant risk to impaired spermatogenesis in the Czech population. The potential clinical role of the previously reported patient-specific Xcnv67 remains to be determined in a larger study population.
Collapse
Affiliation(s)
- Blanka Chylíková
- Institute of Biology and Medical Genetics, 1st Faculty of Medicine, Charles University in Prague and General University Hospital, Praha, Czech Republic
| | - Ivan Hrdlička
- Institute of Biology and Medical Genetics, 1st Faculty of Medicine, Charles University in Prague and General University Hospital, Praha, Czech Republic
| | - Kamila Veselá
- Institute of Biology and Medical Genetics, 1st Faculty of Medicine, Charles University in Prague and General University Hospital, Praha, Czech Republic
| | - Karel Řežábek
- Center for Assisted Reproduction, Clinic of Gynecology and Obstetrics, 1st Faculty of Medicine, Charles University in Prague and General University Hospital, Praha, Czech Republic
| | - František Liška
- Institute of Biology and Medical Genetics, 1st Faculty of Medicine, Charles University in Prague and General University Hospital, Praha, Czech Republic
- * E-mail:
| |
Collapse
|
73
|
Discrimination and characterization of Sertoli cell-only syndrome in non-obstructive azoospermia using cell-free seminal DDX4. Reprod Biomed Online 2016; 33:189-96. [PMID: 27211570 DOI: 10.1016/j.rbmo.2016.05.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 05/01/2016] [Accepted: 05/03/2016] [Indexed: 11/23/2022]
Abstract
Cell-free seminal mRNA (cfs-mRNA) contains testis-specific transcripts from bilateral testes. This study determined the presence of DEAD box polypeptide 4 (DDX4) in cfs-mRNA to identify and characterize the incidence of Sertoli cell-only (SCO) syndrome in men with non-obstructive azoospermia (NOA). DDX4 cfs-mRNA was determined in 315 men with NOA, and compared with testicular samples obtained by microdissection from 19 NOA patients. Karyotype and azoospermia factor microdeletion analysis were performed, and clinical features were evaluated. Negative DDX4 cfs-mRNA suggestive of SCO was found in 13.7% of NOA patients, with a similar incidence in NOA men with known genetic causes and those without known genetic causes. DDX4 cfs-mRNA was absent in 44% of SCO cases diagnosed by testicular histopathology, but present in all patients presenting with maturation arrest or hypospermatogenesis. Furthermore, 84.2% of NOA men with DDX4 cfs-positive mRNA had a DDX4-positive testicular sample. In NOA men without genetic causes, SCO patients discriminated by negative DDX4 cfs-mRNA showed different clinical features when compared with non-SCO cases. These results suggest that the evaluation of DDX4 cfs-mRNA is more accurate than testicular histopathology in discriminating SCO, and also permits the identification of a specific group of NOA men with distinct clinical features.
Collapse
|
74
|
Schrimpf R, Gottschalk M, Metzger J, Martinsson G, Sieme H, Distl O. Screening of whole genome sequences identified high-impact variants for stallion fertility. BMC Genomics 2016; 17:288. [PMID: 27079378 PMCID: PMC4832559 DOI: 10.1186/s12864-016-2608-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 03/30/2016] [Indexed: 02/07/2023] Open
Abstract
Background Stallion fertility is an economically important trait due to the increase of artificial insemination in horses. The availability of whole genome sequence data facilitates identification of rare high-impact variants contributing to stallion fertility. The aim of our study was to genotype rare high-impact variants retrieved from next-generation sequencing (NGS)-data of 11 horses in order to unravel harmful genetic variants in large samples of stallions. Methods Gene ontology (GO) terms and search results from public databases were used to obtain a comprehensive list of human und mice genes predicted to participate in the regulation of male reproduction. The corresponding equine orthologous genes were searched in whole genome sequence data of seven stallions and four mares and filtered for high-impact genetic variants using SnpEFF, SIFT and Polyphen 2 software. All genetic variants with the missing homozygous mutant genotype were genotyped on 337 fertile stallions of 19 breeds using KASP genotyping assays or PCR-RFLP. Mixed linear model analysis was employed for an association analysis with de-regressed estimated breeding values of the paternal component of the pregnancy rate per estrus (EBV-PAT). Results We screened next generation sequenced data of whole genomes from 11 horses for equine genetic variants in 1194 human and mice genes involved in male fertility and linked through common gene ontology (GO) with male reproductive processes. Variants were filtered for high-impact on protein structure and validated through SIFT and Polyphen 2. Only those genetic variants were followed up when the homozygote mutant genotype was missing in the detection sample comprising 11 horses. After this filtering process, 17 single nucleotide polymorphism (SNPs) were left. These SNPs were genotyped in 337 fertile stallions of 19 breeds using KASP genotyping assays or PCR-RFLP. An association analysis in 216 Hanoverian stallions revealed a significant association of the splice-site disruption variant g.37455302G>A in NOTCH1 with the de-regressed estimated breeding values of the paternal component of the pregnancy rate per estrus (EBV-PAT). For 9 high-impact variants within the genes CFTR, OVGP1, FBXO43, TSSK6, PKD1, FOXP1, TCP11, SPATA31E1 and NOTCH1 (g.37453246G>C) absence of the homozygous mutant genotype in the validation sample of all 337 fertile stallions was obvious. Therefore, these variants were considered as potentially deleterious factors for stallion fertility. Conclusions In conclusion, this study revealed 17 genetic variants with a predicted high damaging effect on protein structure and missing homozygous mutant genotype. The g.37455302G>A NOTCH1 variant was identified as a significant stallion fertility locus in Hanoverian stallions and further 9 candidate fertility loci with missing homozygous mutant genotypes were validated in a panel including 19 horse breeds. To our knowledge this is the first study in horses using next generation sequencing data to uncover strong candidate factors for stallion fertility. Electronic supplementary material The online version of this article (doi:10.1186/s12864-016-2608-3) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Rahel Schrimpf
- Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Bünteweg 17p, 30559, Hannover, Germany
| | - Maren Gottschalk
- Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Bünteweg 17p, 30559, Hannover, Germany
| | - Julia Metzger
- Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Bünteweg 17p, 30559, Hannover, Germany
| | - Gunilla Martinsson
- State Stud Celle of Lower Saxony, Spörckenstraße 10, 29221, Celle, Germany
| | - Harald Sieme
- Clinic for Horses, Unit for Reproduction Medicine, University of Veterinary Medicine Hannover, Bünteweg 15, 30559, Hannover, Germany
| | - Ottmar Distl
- Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Bünteweg 17p, 30559, Hannover, Germany.
| |
Collapse
|
75
|
Marchiani S, Tamburrino L, Muratori M, Baldi E. New insights in sperm biology: How benchside results in the search for molecular markers may help understand male infertility. World J Transl Med 2016; 5:26-36. [DOI: 10.5528/wjtm.v5.i1.26] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 01/22/2016] [Accepted: 02/17/2016] [Indexed: 02/06/2023] Open
Abstract
The male factor is responsible for about 40% of couple infertility cases and such percentage is expected to increase in the future because of several likely factors including the presence of endocrine disruptors in the environment, changes in lifestyle habits and advanced couple aging. How such factors affect male fertility status, however, should be clarified. Most studies on male fertility status have focused on parameters analyzed using a spermiogram test, the primary diagnostic tool in the routine assessment of male infertility, which is, however, poorly predictive of both natural and medically assisted conception. For these reasons it is mandatory for the scientific community to identify new molecular markers to incorporate into the existing diagnostic tests of male fertility. Ideally, such markers would be detected in mature spermatozoa to avoid invasive procedures for the patient. This review summarizes the recent advancements in benchside approaches that appear most promising for the development of new diagnostic sperm fertility tests, or identification of therapeutic targets, and, illustrates their advantages and limits.
Collapse
|
76
|
Skakkebaek NE, Rajpert-De Meyts E, Buck Louis GM, Toppari J, Andersson AM, Eisenberg ML, Jensen TK, Jørgensen N, Swan SH, Sapra KJ, Ziebe S, Priskorn L, Juul A. Male Reproductive Disorders and Fertility Trends: Influences of Environment and Genetic Susceptibility. Physiol Rev 2016; 96:55-97. [PMID: 26582516 DOI: 10.1152/physrev.00017.2015] [Citation(s) in RCA: 598] [Impact Index Per Article: 74.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
It is predicted that Japan and European Union will soon experience appreciable decreases in their populations due to persistently low total fertility rates (TFR) below replacement level (2.1 child per woman). In the United States, where TFR has also declined, there are ethnic differences. Caucasians have rates below replacement, while TFRs among African-Americans and Hispanics are higher. We review possible links between TFR and trends in a range of male reproductive problems, including testicular cancer, disorders of sex development, cryptorchidism, hypospadias, low testosterone levels, poor semen quality, childlessness, changed sex ratio, and increasing demand for assisted reproductive techniques. We present evidence that several adult male reproductive problems arise in utero and are signs of testicular dysgenesis syndrome (TDS). Although TDS might result from genetic mutations, recent evidence suggests that it most often is related to environmental exposures of the fetal testis. However, environmental factors can also affect the adult endocrine system. Based on our review of genetic and environmental factors, we conclude that environmental exposures arising from modern lifestyle, rather than genetics, are the most important factors in the observed trends. These environmental factors might act either directly or via epigenetic mechanisms. In the latter case, the effects of exposures might have an impact for several generations post-exposure. In conclusion, there is an urgent need to prioritize research in reproductive physiology and pathophysiology, particularly in highly industrialized countries facing decreasing populations. We highlight a number of topics that need attention by researchers in human physiology, pathophysiology, environmental health sciences, and demography.
Collapse
Affiliation(s)
- Niels E Skakkebaek
- Department of Growth & Reproduction and EDMaRC, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Department of Physiology & Pediatrics, University of Turku and Turku University Hospital, Turku, Finland; Male Reproductive Medicine & Surgery Program, Stanford University, Stanford, California; Icahn School of Medicine at Mount Sinai, New York, New York; and The Fertility Clinic, Rigshospitalet, Copenhagen, Denmark
| | - Ewa Rajpert-De Meyts
- Department of Growth & Reproduction and EDMaRC, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Department of Physiology & Pediatrics, University of Turku and Turku University Hospital, Turku, Finland; Male Reproductive Medicine & Surgery Program, Stanford University, Stanford, California; Icahn School of Medicine at Mount Sinai, New York, New York; and The Fertility Clinic, Rigshospitalet, Copenhagen, Denmark
| | - Germaine M Buck Louis
- Department of Growth & Reproduction and EDMaRC, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Department of Physiology & Pediatrics, University of Turku and Turku University Hospital, Turku, Finland; Male Reproductive Medicine & Surgery Program, Stanford University, Stanford, California; Icahn School of Medicine at Mount Sinai, New York, New York; and The Fertility Clinic, Rigshospitalet, Copenhagen, Denmark
| | - Jorma Toppari
- Department of Growth & Reproduction and EDMaRC, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Department of Physiology & Pediatrics, University of Turku and Turku University Hospital, Turku, Finland; Male Reproductive Medicine & Surgery Program, Stanford University, Stanford, California; Icahn School of Medicine at Mount Sinai, New York, New York; and The Fertility Clinic, Rigshospitalet, Copenhagen, Denmark
| | - Anna-Maria Andersson
- Department of Growth & Reproduction and EDMaRC, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Department of Physiology & Pediatrics, University of Turku and Turku University Hospital, Turku, Finland; Male Reproductive Medicine & Surgery Program, Stanford University, Stanford, California; Icahn School of Medicine at Mount Sinai, New York, New York; and The Fertility Clinic, Rigshospitalet, Copenhagen, Denmark
| | - Michael L Eisenberg
- Department of Growth & Reproduction and EDMaRC, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Department of Physiology & Pediatrics, University of Turku and Turku University Hospital, Turku, Finland; Male Reproductive Medicine & Surgery Program, Stanford University, Stanford, California; Icahn School of Medicine at Mount Sinai, New York, New York; and The Fertility Clinic, Rigshospitalet, Copenhagen, Denmark
| | - Tina Kold Jensen
- Department of Growth & Reproduction and EDMaRC, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Department of Physiology & Pediatrics, University of Turku and Turku University Hospital, Turku, Finland; Male Reproductive Medicine & Surgery Program, Stanford University, Stanford, California; Icahn School of Medicine at Mount Sinai, New York, New York; and The Fertility Clinic, Rigshospitalet, Copenhagen, Denmark
| | - Niels Jørgensen
- Department of Growth & Reproduction and EDMaRC, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Department of Physiology & Pediatrics, University of Turku and Turku University Hospital, Turku, Finland; Male Reproductive Medicine & Surgery Program, Stanford University, Stanford, California; Icahn School of Medicine at Mount Sinai, New York, New York; and The Fertility Clinic, Rigshospitalet, Copenhagen, Denmark
| | - Shanna H Swan
- Department of Growth & Reproduction and EDMaRC, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Department of Physiology & Pediatrics, University of Turku and Turku University Hospital, Turku, Finland; Male Reproductive Medicine & Surgery Program, Stanford University, Stanford, California; Icahn School of Medicine at Mount Sinai, New York, New York; and The Fertility Clinic, Rigshospitalet, Copenhagen, Denmark
| | - Katherine J Sapra
- Department of Growth & Reproduction and EDMaRC, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Department of Physiology & Pediatrics, University of Turku and Turku University Hospital, Turku, Finland; Male Reproductive Medicine & Surgery Program, Stanford University, Stanford, California; Icahn School of Medicine at Mount Sinai, New York, New York; and The Fertility Clinic, Rigshospitalet, Copenhagen, Denmark
| | - Søren Ziebe
- Department of Growth & Reproduction and EDMaRC, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Department of Physiology & Pediatrics, University of Turku and Turku University Hospital, Turku, Finland; Male Reproductive Medicine & Surgery Program, Stanford University, Stanford, California; Icahn School of Medicine at Mount Sinai, New York, New York; and The Fertility Clinic, Rigshospitalet, Copenhagen, Denmark
| | - Lærke Priskorn
- Department of Growth & Reproduction and EDMaRC, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Department of Physiology & Pediatrics, University of Turku and Turku University Hospital, Turku, Finland; Male Reproductive Medicine & Surgery Program, Stanford University, Stanford, California; Icahn School of Medicine at Mount Sinai, New York, New York; and The Fertility Clinic, Rigshospitalet, Copenhagen, Denmark
| | - Anders Juul
- Department of Growth & Reproduction and EDMaRC, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; Department of Physiology & Pediatrics, University of Turku and Turku University Hospital, Turku, Finland; Male Reproductive Medicine & Surgery Program, Stanford University, Stanford, California; Icahn School of Medicine at Mount Sinai, New York, New York; and The Fertility Clinic, Rigshospitalet, Copenhagen, Denmark
| |
Collapse
|
77
|
The "omics" of human male infertility: integrating big data in a systems biology approach. Cell Tissue Res 2015; 363:295-312. [PMID: 26661835 DOI: 10.1007/s00441-015-2320-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 10/26/2015] [Indexed: 12/11/2022]
Abstract
Spermatogenesis is a complex process in which >2300 genes are temporally and spatially regulated to form a terminally differentiated sperm cell that must maintain the ability to contribute to a totipotent embryo which can successfully differentiate into a healthy individual. This process is dependent on fidelity of the genome, epigenome, transcriptome, and proteome of the spermatogonia, supporting cells, and the resulting sperm cell. Infertility and/or disease risk may increase in the offspring if abnormalities are present. This review highlights the recent advances in our understanding of these processes in light of the "omics revolution". We briefly review each of these areas, as well as highlight areas of future study and needs to advance further.
Collapse
|
78
|
The Founder Strains of the Collaborative Cross Express a Complex Combination of Advantageous and Deleterious Traits for Male Reproduction. G3-GENES GENOMES GENETICS 2015; 5:2671-83. [PMID: 26483008 PMCID: PMC4683640 DOI: 10.1534/g3.115.020172] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Surveys of inbred strains of mice are standard approaches to determine the heritability and range of phenotypic variation for biomedical traits. In addition, they may lead to the identification of novel phenotypes and models of human disease. Surprisingly, male reproductive phenotypes are among the least-represented traits in the Mouse Phenome Database. Here we report the results of a broad survey of the eight founder inbred strains of both the Collaborative Cross (CC) and the Diversity Outbred populations, two new mouse resources that are being used as platforms for systems genetics and sources of mouse models of human diseases. Our survey includes representatives of the three main subspecies of the house mice and a mix of classical and wild-derived inbred strains. In addition to standard staples of male reproductive phenotyping such as reproductive organ weights, sperm counts, and sperm morphology, our survey includes sperm motility and the first detailed survey of testis histology. As expected for such a broad survey, heritability varies widely among traits. We conclude that although all eight inbred strains are fertile, most display a mix of advantageous and deleterious male reproductive traits. The CAST/EiJ strain is an outlier, with an unusual combination of deleterious male reproductive traits including low sperm counts, high levels of morphologically abnormal sperm, and poor motility. In contrast, sperm from the PWK/PhJ and WSB/EiJ strains had the greatest percentages of normal morphology and vigorous motility. Finally, we report an abnormal testis phenotype that is highly heritable and restricted to the WSB/EiJ strain. This phenotype is characterized by the presence of a large, but variable, number of vacuoles in at least 10% of the seminiferous tubules. The onset of the phenotype between 2 and 3 wk of age is temporally correlated with the formation of the blood-testis barrier. We speculate that this phenotype may play a role in high rates of extinction in the CC project and in the phenotypes associated with speciation in genetic crosses that use the WSB/EiJ strain as representative of the Mus muculus domesticus subspecies.
Collapse
|
79
|
Ho NRY, Huang N, Conrad DF. Improved detection of disease-associated variation by sex-specific characterization and prediction of genes required for fertility. Andrology 2015; 3:1140-9. [PMID: 26473511 DOI: 10.1111/andr.12109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Revised: 08/07/2015] [Accepted: 08/26/2015] [Indexed: 01/18/2023]
Abstract
Despite its great potential, high-throughput functional genomic data are rarely integrated and applied to characterizing the genomic basis of fertility. We obtained and reprocessed over 30 functional genomics datasets from human and mouse germ cells to perform genome-wide prediction of genes underlying various reproductive phenotypes in both species. Genes involved in male fertility are easier to predict than their female analogs. Of the multiple genomic data types examined, protein-protein interactions are by far the most informative for gene prediction, followed by gene expression, and then epigenetic marks. As an application of our predictions, we show that copy number variants (CNVs) disrupting predicted fertility genes are more strongly associated with gonadal dysfunction in male and female case-control cohorts when compared to all gene-disrupting CNVs (OR = 1.64, p < 1.64 × 10(-8) vs. OR = 1.25, p < 4 × 10(-6)). Using gender-specific fertility gene annotations further increased the observed associations (OR = 2.31, p < 2.2 × 10(-16)). We provide our gene predictions as a resource with this article.
Collapse
Affiliation(s)
- N R Y Ho
- Departments of Genetics, and Pathology & Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - N Huang
- Departments of Genetics, and Pathology & Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - D F Conrad
- Departments of Genetics, and Pathology & Immunology, Washington University School of Medicine, St. Louis, MO, USA
| |
Collapse
|
80
|
Caseiro AL, Regalo A, Pereira E, Esteves T, Fernandes F, Carvalho J. Implication of sperm chromosomal abnormalities in recurrent abortion and multiple implantation failure. Reprod Biomed Online 2015; 31:481-5. [PMID: 26299791 DOI: 10.1016/j.rbmo.2015.07.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 06/19/2015] [Accepted: 07/01/2015] [Indexed: 11/30/2022]
Abstract
Currently, some infertility treatment centres provide sperm karyotype analysis, although the impact of sperm chromosomal abnormalities on fertility is not yet fully understood. Several studies using fluorescence in-situ hybridization (FISH) to analyse sperm chromosomal constitution discovered that the incidence of aneuploidy is increased in individuals with a history of repeated abortion or implantation failure and is even higher in cases of oligoasthenoteratozoospermia (OAT), abnormal somatic karyotype or in spermatozoa retrieved directly from the testis or epididymis, showing that the application of FISH in these cases may be of some benefit for improving the reproductive outcome. This article presents the results of clinical trials of FISH analysis on spermatozoa, the medical indications for performing this examination, its results in infertile patients and the advantages when performing genetic counselling prior to treatment. Also discussed is the possibility of applying the latest techniques of genetic analysis in these cases and the potential benefits for improving the prognosis of male infertility.
Collapse
Affiliation(s)
- Ana Lara Caseiro
- Department of Obstetrics and Gynecology, Hospital EPE Espirito Santo, Largo do Senhor da Pobreza, 7000-811 Évora, Portugal.
| | - Ana Regalo
- Department of Obstetrics and Gynecology, Hospital EPE Espirito Santo, Largo do Senhor da Pobreza, 7000-811 Évora, Portugal
| | - Elisa Pereira
- Department of Obstetrics and Gynecology, Hospital EPE Espirito Santo, Largo do Senhor da Pobreza, 7000-811 Évora, Portugal
| | - Telma Esteves
- Department of Obstetrics and Gynecology, Hospital EPE Espirito Santo, Largo do Senhor da Pobreza, 7000-811 Évora, Portugal
| | - Fernando Fernandes
- Infertility Department, Hospital Espirito Santo EPE, Largo do Senhor da Pobreza, 7000-811, Évora, Portugal
| | - Joaquim Carvalho
- Department of Obstetrics and Gynecology, Hospital EPE Espirito Santo, Largo do Senhor da Pobreza, 7000-811 Évora, Portugal
| |
Collapse
|
81
|
Increased Risk of Cancer in Infertile Men: Analysis of U.S. Claims Data. J Urol 2015; 193:1596-601. [DOI: 10.1016/j.juro.2014.11.080] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/10/2014] [Indexed: 11/22/2022]
|
82
|
Fluorescence in situ hybridization detects increased sperm aneuploidy in men with recurrent pregnancy loss. Fertil Steril 2015; 103:906-909.e1. [PMID: 25707335 DOI: 10.1016/j.fertnstert.2015.01.029] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 01/20/2015] [Accepted: 01/20/2015] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To investigate, in men presenting with recurrent pregnancy loss (RPL), the prevalence of sperm autosome and sex chromosome aneuploidy. DESIGN Retrospective study. SETTING Male infertility clinic. PATIENT(S) A total of 140 men with RPL provided semen samples, and five normozoospermic controls provided 140 semen samples for comparison. Recurrent pregnancy loss, documented in the female partners, was defined as a prior miscarriage and/or recurrent IVF/intracytoplasmic sperm injection failure. INTERVENTION(S) Fluorescence in situ hybridization (FISH) was used to detect numerical abnormalities in sex chromosomes (X, Y) and autosomes (13, 18, 21) in ejaculated sperm. MAIN OUTCOME MEASURE(S) Sperm aneuploidy in men with RPL and normozoospermic controls. RESULT(S) Men with RPL had a greater percentage of sperm aneuploidy within the sex chromosomes and chromosomes 18 and 13/21 (1.04% vs. 0.38%; 0.18% vs. 0.03%; 0.26% vs. 0.08%). In total, 40% of men with normal sperm density and motility had abnormal sperm aneuploidy in all the chromosomes analyzed. Men with abnormal sperm density and motility had a higher proportion of sperm sex chromosome aneuploidy than men with normal density/motility (62% vs. 45%). Men with normal strict morphology (>4%) had lower rates of sex chromosome and sperm aneuploidy than men with abnormal strict morphology (28% vs. 57%). There was no association between sperm DNA fragmentation and sperm aneuploidy. CONCLUSION(S) Men with RPL have increased sperm aneuploidy compared with controls. A total of 40% of men with RPL and normal sperm density/motility had abnormal sperm aneuploidy. Men with oligoasthenozoospermia and abnormal strict morphology had a greater percentage of sperm aneuploidy compared with men with normal semen parameters.
Collapse
|
83
|
Jorgez CJ, Wilken N, Addai JB, Newberg J, Vangapandu HV, Pastuszak AW, Mukherjee S, Rosenfeld JA, Lipshultz LI, Lamb DJ. Genomic and genetic variation in E2F transcription factor-1 in men with nonobstructive azoospermia. Fertil Steril 2015; 103:44-52.e1. [PMID: 25439843 PMCID: PMC4282601 DOI: 10.1016/j.fertnstert.2014.09.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 09/16/2014] [Accepted: 09/17/2014] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To identify gene dosage changes associated with nonobstructive azoospermia (NOA) using array comparative genomic hybridization (aCGH). DESIGN Prospective study. SETTING Medical school. PATIENT(S) One hundred ten men with NOA and 78 fertile controls. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) The study has four distinct analytic components: aCGH, a molecular karyotype that detects copy number variations (CNVs); Taqman CNV assays to validate CNVs; mutation identification by Sanger sequencing; and histological analyses of testicular tissues. RESULT(S) A microduplication at 20q11.22 encompassing E2F transcription factor-1 (E2F1) was identified in one of eight men with NOA analyzed using aCGH. CNVs were confirmed and in an additional 102 men with NOA screened using Taqman CNV assays, for a total of 110 NOA men analyzed for CNVs in E2F1. Eight of 110 (7.3%) NOA men had microduplications or microdeletions of E2F1 that were absent in fertile controls. CONCLUSION(S) E2F1 microduplications or microdeletions are present in men with NOA (7.3%). Duplications or deletions of E2F1 occur very rarely in the general population (0.011%), but E2F1 gene dosage changes, previously reported only in cancers, are present in a subset of NOA men. These results recapitulate the infertility phenotype seen in mice lacking or overexpressing E2f1.
Collapse
Affiliation(s)
- Carolina J. Jorgez
- Center for Reproductive Medicine, Baylor College of Medicine, Houston, TX, 77030
- Scott Department of Urology, Baylor College of Medicine, Houston, TX, 77030
| | - Nathan Wilken
- Center for Reproductive Medicine, Baylor College of Medicine, Houston, TX, 77030
- Scott Department of Urology, Baylor College of Medicine, Houston, TX, 77030
| | - Josephine B. Addai
- Center for Reproductive Medicine, Baylor College of Medicine, Houston, TX, 77030
- Scott Department of Urology, Baylor College of Medicine, Houston, TX, 77030
| | - Justin Newberg
- Department of Molecular and Cell Biology, Baylor College of Medicine, Houston, TX, 77030
| | - Hima V. Vangapandu
- Scott Department of Urology, Baylor College of Medicine, Houston, TX, 77030
| | - Alexander W. Pastuszak
- Center for Reproductive Medicine, Baylor College of Medicine, Houston, TX, 77030
- Scott Department of Urology, Baylor College of Medicine, Houston, TX, 77030
| | | | - Jill A. Rosenfeld
- Signature Genomic Laboratories, PerkinElmer, Inc., Spokane, WA, 99207
| | - Larry I. Lipshultz
- Center for Reproductive Medicine, Baylor College of Medicine, Houston, TX, 77030
- Scott Department of Urology, Baylor College of Medicine, Houston, TX, 77030
| | - Dolores J. Lamb
- Center for Reproductive Medicine, Baylor College of Medicine, Houston, TX, 77030
- Scott Department of Urology, Baylor College of Medicine, Houston, TX, 77030
- Department of Molecular and Cell Biology, Baylor College of Medicine, Houston, TX, 77030
| |
Collapse
|
84
|
Meiotic Nondisjunction: Insights into the Origin and Significance of Aneuploidy in Human Spermatozoa. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 868:1-21. [DOI: 10.1007/978-3-319-18881-2_1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
85
|
Schrimpf R, Metzger J, Martinsson G, Sieme H, Distl O. Implication of FKBP6
for Male Fertility in Horses. Reprod Domest Anim 2014; 50:195-199. [DOI: 10.1111/rda.12467] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 11/16/2014] [Indexed: 11/29/2022]
Affiliation(s)
- R Schrimpf
- Institute for Animal Breeding and Genetics; University of Veterinary Medicine Hannover; Hannover Germany
| | - J Metzger
- Institute for Animal Breeding and Genetics; University of Veterinary Medicine Hannover; Hannover Germany
| | | | - H Sieme
- Clinic for Horses; Unit for Reproduction Medicine; University of Veterinary Medicine Hannover; Hannover Germany
| | - O Distl
- Institute for Animal Breeding and Genetics; University of Veterinary Medicine Hannover; Hannover Germany
| |
Collapse
|
86
|
Wang C, Swerdloff RS. Limitations of semen analysis as a test of male fertility and anticipated needs from newer tests. Fertil Steril 2014; 102:1502-7. [PMID: 25458617 DOI: 10.1016/j.fertnstert.2014.10.021] [Citation(s) in RCA: 182] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Revised: 10/13/2014] [Accepted: 10/14/2014] [Indexed: 11/25/2022]
Abstract
Semen analysis is the first step to identify male factor infertility. Standardized methods of semen analysis are available allowing accurate assessment of sperm quality and comparison among laboratories. Population-based reference ranges are available for standard semen and sperm parameters. Sperm numbers and morphology are associated with time to natural pregnancy, whereas sperm motility may be less predictive. Routine semen analysis does not measure the fertilizing potential of spermatozoa and the complex changes that occur in the female reproductive tract before fertilization. Whether assisted reproduction technology (ART) is required depends not only on male factors but female fecundity. Newer tests should predict the success of fertilization in vitro and the outcome of the progeny.
Collapse
Affiliation(s)
- Christina Wang
- Division of Endocrinology, Department of Medicine, Harbor-UCLA Medical Center and Los Angeles Biomedical Research Institute, Torrance, California; UCLA-Clinical and Translational Science Institute, Harbor-UCLA Medical Center and Los Angeles Biomedical Research Institute, Torrance, California.
| | - Ronald S Swerdloff
- Division of Endocrinology, Department of Medicine, Harbor-UCLA Medical Center and Los Angeles Biomedical Research Institute, Torrance, California
| |
Collapse
|