151
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Pollard SH, Cox KJ, Blackburn BE, Wilkins DG, Carrell DT, Stanford JB, Porucznik CA. Male exposure to bisphenol A (BPA) and semen quality in the Home Observation of Periconceptional Exposures (HOPE) cohort. Reprod Toxicol 2019; 90:82-87. [PMID: 31445078 DOI: 10.1016/j.reprotox.2019.08.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 08/14/2019] [Accepted: 08/20/2019] [Indexed: 11/29/2022]
Abstract
BACKGROUND Exposure to bis-phenol A (BPA) has been associated with reduced semen quality. The objective of this study was to examine associations between BPA measured in serial daily first-morning urine samples and semen quality parameters among men trying to conceive. METHODS This prospective, preconception cohort included 161 men ages 18-40 without known subfertility. Men collected daily, first morning urine during their female partner's fertile window. Semen samples were collected through intercourse after the fertile window. RESULTS Samples from 161 men were analyzed. Higher geometric mean (GM) BPA exposures (ng/mL) were found among men with abnormal sperm tail morphology (GM = 3.12, 95% CI = 2.43, 4.01) compared to men with normal morphologic findings (GM = 2.39, 95% CI = 2.17, 2.74). There was no association with sperm count. CONCLUSION Higher exposure to BPA was associated with abnormal sperm tail morphology in this prospective, pre-conception cohort.
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Affiliation(s)
- Sarah Hatch Pollard
- Division of Otolaryngology, Department of Surgery, University of Utah, Salt Lake City, UT, USA; Division of Public Health, Department of Family and Preventive Medicine, University of Utah, Salt Lake City, UT, USA
| | - Kyley J Cox
- Division of Public Health, Department of Family and Preventive Medicine, University of Utah, Salt Lake City, UT, USA
| | - Brenna E Blackburn
- Division of Public Health, Department of Family and Preventive Medicine, University of Utah, Salt Lake City, UT, USA
| | - Diana G Wilkins
- Division of Medical Laboratory Science, Department of Pathology, University of Utah, Salt Lake City, UT, USA
| | - Douglas T Carrell
- Division of Andrology, Department of Surgery, University of Utah, Salt Lake City, UT, USA
| | - Joseph B Stanford
- Division of Public Health, Department of Family and Preventive Medicine, University of Utah, Salt Lake City, UT, USA
| | - Christina A Porucznik
- Division of Public Health, Department of Family and Preventive Medicine, University of Utah, Salt Lake City, UT, USA.
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152
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Rosiak-Gill A, Gill K, Jakubik J, Fraczek M, Patorski L, Gaczarzewicz D, Kurzawa R, Kurpisz M, Piasecka M. Age-related changes in human sperm DNA integrity. Aging (Albany NY) 2019; 11:5399-5411. [PMID: 31412318 PMCID: PMC6710060 DOI: 10.18632/aging.102120] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 07/20/2019] [Indexed: 01/10/2023]
Abstract
Abnormal standard semen characteristics and reduced sperm chromatin maturity can appear with increasing male age. However, the influence of paternal age on semen parameters is still controversial. Therefore, this study was designed to estimate the influence of paternal age not only on conventional semen characteristics but also on sperm DNA integrity. This research was carried out on ejaculated sperm cells obtained from men (n = 1124) aged ≥40 y and <40 y. Our data revealed a decreased semen volume and an increased percentage of DFI (sperm DNA fragmentation index) in older men compared to younger men in the entire study cohort, in men with normozoospermia and in men with abnormal semen parameters. Moreover, there was a higher incidence of sperm DNA damage (>10% DFI, low fertility potential) in the groups of men aged ≥40 y than in the groups of men aged <40 y. Older men had over twice the odds ratio for high sperm DNA damage as younger men. Our findings suggest a detrimental effect of advanced paternal age on sperm chromatin integrity. The data show that the evaluation of sperm DNA has greater clinical utility than standard semen analysis in case of male fertility potential assessment.
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Affiliation(s)
- Aleksandra Rosiak-Gill
- Department of Histology and Developmental Biology, Pomeranian Medical University in Szczecin, Szczecin 71-210, Poland.,VitroLive Fertility Clinic in Szczecin, Szczecin 70-483, Poland
| | - Kamil Gill
- Department of Histology and Developmental Biology, Pomeranian Medical University in Szczecin, Szczecin 71-210, Poland
| | - Joanna Jakubik
- Department of Histology and Developmental Biology, Pomeranian Medical University in Szczecin, Szczecin 71-210, Poland
| | - Monika Fraczek
- Institute of Human Genetics, Polish Academy of Sciences, Poznan 60-479, Poland
| | - Lukasz Patorski
- Department of Histology and Developmental Biology, Pomeranian Medical University in Szczecin, Szczecin 71-210, Poland.,Department of Gynecology, Endocrinology and Gynecological Oncology, Pomeranian Medical University in Szczecin, Szczecin 71-252, Poland
| | - Dariusz Gaczarzewicz
- Department of Animal Reproduction, Biotechnology and Environmental Hygiene, West Pomeranian University of Technology, Szczecin 71-270, Poland
| | - Rafał Kurzawa
- Department of Procreative Health, Pomeranian Medical University in Szczecin, Szczecin 71-210, Poland.,VitroLive Fertility Clinic in Szczecin, Szczecin 70-483, Poland
| | - Maciej Kurpisz
- Institute of Human Genetics, Polish Academy of Sciences, Poznan 60-479, Poland
| | - Malgorzata Piasecka
- Department of Histology and Developmental Biology, Pomeranian Medical University in Szczecin, Szczecin 71-210, Poland
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153
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Baldwin K. The biomedicalisation of reproductive ageing: reproductive citizenship and the gendering of fertility risk. HEALTH RISK & SOCIETY 2019. [DOI: 10.1080/13698575.2019.1651256] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Kylie Baldwin
- Centre for Reproduction Research, De Montfort University Leicester, Leicester, UK
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154
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Carrasquillo RJ, Kohn TP, Cinnioglu C, Rubio C, Simon C, Ramasamy R, Al-Asmar N. Advanced paternal age does not affect embryo aneuploidy following blastocyst biopsy in egg donor cycles. J Assist Reprod Genet 2019; 36:2039-2045. [PMID: 31385121 DOI: 10.1007/s10815-019-01549-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 07/26/2019] [Indexed: 01/05/2023] Open
Abstract
PURPOSE To study the impact of advanced paternal age on embryo aneuploidy. METHODS This is a multicenter international retrospective case series of couples undergoing assisted reproduction via in vitro fertilization using donor eggs to control for maternal factors and preimplantation genetic testing for aneuploidy via next-generation sequencing at Igenomix reproductive testing centers. The main outcome measure was the prevalence of embryo aneuploidy in egg donor cycles. Semen analysis data was retrieved for a small subset of the male patients. RESULTS Data from 1202 IVF/ICSI egg donor cycles using ejaculated sperm (total 6934 embryos) evaluated using PGT-A between January 2016 and April 2018 in a global population across all Igenomix centers were included. No significant association was identified between advancing paternal age and the prevalence of embryo aneuploidy overall and when analyzing for each chromosome. There was also no significant association between advancing paternal age and specific aneuploid conditions (monosomy, trisomy, partial deletion/duplication) for all chromosomes in the genome. CONCLUSIONS This is the largest study of its kind in an international patient population to evaluate the impact of advancing paternal age on embryo aneuploidy. We conclude there is no specific effect of paternal age on the prevalence of embryo aneuploidy in the context of embryo biopsies from egg donor cycles.
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Affiliation(s)
- Robert J Carrasquillo
- Division of Urology, Beth Israel Deaconess Medical Center, 145 Rosemary Street, C-1, Needham, MA, 02494, USA. .,Igenomix, Valencia, Spain.
| | - Taylor P Kohn
- Department of Urology, James Buchanan Brady Urological Institute, Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | | | | | | | - Ranjith Ramasamy
- Department of Urology, University of Miami Health System, Miami, FL, USA
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155
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Kaufman JM, Lapauw B, Mahmoud A, T'Sjoen G, Huhtaniemi IT. Aging and the Male Reproductive System. Endocr Rev 2019; 40:906-972. [PMID: 30888401 DOI: 10.1210/er.2018-00178] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 12/27/2018] [Indexed: 12/21/2022]
Abstract
This narrative review presents an overview of current knowledge on fertility and reproductive hormone changes in aging men, the factors driving and modulating these changes, their clinical consequences, and the benefits and risks of testosterone (T) therapy. Aging is accompanied by moderate decline of gamete quality and fertility. Population mean levels show a mild total T decline, an SHBG increase, a steeper free T decline, and a moderate LH increase with important contribution of comorbidities (e.g., obesity) to these changes. Sexual symptoms and lower hematocrit are associated with low T and are partly responsive to T therapy. The relationship of serum T with body composition and metabolic health is bidirectional; limited beneficial effects of T therapy on body composition have only marginal effects on metabolic health and physical function. Skeletal changes are associated primarily with estradiol and SHBG. Cognitive decline is not consistently linked to low T and is not improved by T therapy. Although limited evidence links moderate androgen decline with depressive symptoms, T therapy has small beneficial effects on mood, depressive symptoms, and vitality in elderly patients with low T. Suboptimal T (and/or DHT) has been associated with increased risk of stroke, but not of ischemic heart disease, whereas an association with mortality probably reflects that low T is a marker of poor health. Globally, neither severity of clinical consequences attributable to low T nor the nature and magnitude of beneficial treatment effects justify the concept of some broadly applied "T replacement therapy" in older men with low T. Moreover, long-term safety of T therapy is not established.
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Affiliation(s)
- Jean-Marc Kaufman
- Department of Endocrinology, Ghent University Hospital, Ghent, Belgium
| | - Bruno Lapauw
- Department of Endocrinology, Ghent University Hospital, Ghent, Belgium
| | - Ahmed Mahmoud
- Department of Endocrinology, Ghent University Hospital, Ghent, Belgium
| | - Guy T'Sjoen
- Department of Endocrinology, Ghent University Hospital, Ghent, Belgium
| | - Ilpo Tapani Huhtaniemi
- Department of Surgery and Cancer, Institute of Reproductive and Developmental Biology, Imperial College London, London, United Kingdom.,Department of Physiology, Institute of Biomedicine, University of Turku, Turku, Finland
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156
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De Jonge C, Barratt CLR. The present crisis in male reproductive health: an urgent need for a political, social, and research roadmap. Andrology 2019; 7:762-768. [PMID: 31241256 DOI: 10.1111/andr.12673] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 05/30/2019] [Accepted: 06/03/2019] [Indexed: 12/16/2022]
Abstract
BACKGROUND There is a global crisis in male reproductive health. Evidence comes from globally declining sperm counts and increasing male reproductive system abnormalities, such as cryptorchidism, germ cell tumors, and onset of puberty. Male factor infertility occurs in ~40% of couples experiencing infertility. Data demonstrate an association between male infertility and overall health. Associated significant health conditions include diabetes mellitus, metabolic disorders, and cardiovascular disease. Adding to the complexity is that men typically do not seek health care unless there is acute medical need or, as in the case of the infertile couple, the male goes for a reproductive examination and semen analysis. However, 25% of the time a reproductive health examination does not occur. Couples are increasingly utilizing IVF at more advanced ages, and advanced paternal age is associated with increased risk for (i) adverse perinatal outcomes for both offspring and mother; (ii) early child mortality, cancer, and mental health issues. In addition to age, paternal lifestyle factors, such as obesity and smoking, impact not only the male fertility but also the offspring wellness. OBJECTIVES The purpose of this paper was (i) to spotlight emerging and concerning data on male reproductive health, the relationship(s) between male reproductive and somatic health, and the heritable conditions father can pass to offspring, and (ii) to present a strategic roadmap with the goals of increasing (a) the awareness of men and society on the aforementioned, (b) the participation of men in healthcare seeking, and (c) advocacy to invigorate policy and funding agencies to support increased research into male reproductive biology. CONCLUSIONS The Male Reproductive Health Initiative (MRHI) is a newly established and rapidly growing global consortium of key opinion leaders in research, medicine, funding and policy agencies, and patient support groups that are moving forward the significant task of accomplishing the goals of the strategic roadmap.
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Affiliation(s)
- C De Jonge
- Andrology Program, University of Minnesota Medical Center, Minneapolis, MN, USA.,Department of Urology, University of Minnesota, Minneapolis, MN, USA
| | - C L R Barratt
- Division Systems Medicine, Reproductive Medicine, School of Medicine, University of Dundee, Dundee, UK
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157
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Silva JV, Cabral M, Correia BR, Carvalho P, Sousa M, Oliveira PF, Fardilha M. mTOR Signaling Pathway Regulates Sperm Quality in Older Men. Cells 2019; 8:cells8060629. [PMID: 31234465 PMCID: PMC6627782 DOI: 10.3390/cells8060629] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 06/17/2019] [Accepted: 06/19/2019] [Indexed: 01/07/2023] Open
Abstract
Understanding how age affects fertility becomes increasingly relevant as couples delay childbearing toward later stages of their lives. While the influence of maternal age on fertility is well established, the impact of paternal age is poorly characterized. Thus, this study aimed to understand the molecular mechanisms responsible for age-dependent decline in spermatozoa quality. To attain it, we evaluated the impact of male age on the activity of signaling proteins in two distinct spermatozoa populations: total spermatozoa fraction and highly motile/viable fraction. In older men, we observed an inhibition of the mechanistic target of rapamycin complex 1 (mTORC1) in the highly viable spermatozoa population. On the contrary, when considering the entire spermatozoa population (including defective/immotile/apoptotic cells) our findings support an active mTORC1 signaling pathway in older men. Additionally, total spermatozoa fractions of older men presented increased levels of apoptotic/stress markers [e.g., cellular tumor antigen p53 (TP53)] and mitogen-activated protein kinases (MAPKs) activity. Moreover, we established that the levels of most signaling proteins analyzed were consistently and significantly altered in men older than 27 years of age. This study was the first to associate the mTOR signaling pathway with the age impact on spermatozoa quality. Additionally, we constructed a network of the sperm proteins associated with male aging, identifying TP53 as a central player in spermatozoa aging.
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Affiliation(s)
- Joana Vieira Silva
- Laboratory of Signal Transduction, Department of Medical Sciences, Institute of Biomedicine-iBiMED, University of Aveiro, 3810-193 Aveiro, Portugal.
- i3S-Instituto de Investigação e Inovação em Saúde, University of Porto, 4200-135 Porto, Portugal.
- Unit for Multidisciplinary Research in Biomedicine (UMIB), Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, 4050-313 Porto, Portugal.
| | - Madalena Cabral
- COGE-Clínica Obstétrica e Ginecológica de Espinho, 4500-057 Espinho, Portugal.
| | - Bárbara Regadas Correia
- Laboratory of Signal Transduction, Department of Medical Sciences, Institute of Biomedicine-iBiMED, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Pedro Carvalho
- Laboratory of Signal Transduction, Department of Medical Sciences, Institute of Biomedicine-iBiMED, University of Aveiro, 3810-193 Aveiro, Portugal.
- COGE-Clínica Obstétrica e Ginecológica de Espinho, 4500-057 Espinho, Portugal.
| | - Mário Sousa
- Unit for Multidisciplinary Research in Biomedicine (UMIB), Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, 4050-313 Porto, Portugal.
- Department of Microscopy, Laboratory of Cell Biology, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, 4050-313 Porto, Portugal.
| | - Pedro Fontes Oliveira
- i3S-Instituto de Investigação e Inovação em Saúde, University of Porto, 4200-135 Porto, Portugal.
- Unit for Multidisciplinary Research in Biomedicine (UMIB), Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, 4050-313 Porto, Portugal.
- Department of Microscopy, Laboratory of Cell Biology, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, 4050-313 Porto, Portugal.
| | - Margarida Fardilha
- Laboratory of Signal Transduction, Department of Medical Sciences, Institute of Biomedicine-iBiMED, University of Aveiro, 3810-193 Aveiro, Portugal.
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158
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Olesen IA, Joensen UN, Petersen JH, Almstrup K, Rajpert-De Meyts E, Carlsen E, McLachlan R, Juul A, Jørgensen N. Decrease in semen quality and Leydig cell function in infertile men: a longitudinal study. Hum Reprod 2019; 33:1963-1974. [PMID: 30247578 DOI: 10.1093/humrep/dey283] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 08/23/2018] [Indexed: 12/30/2022] Open
Abstract
STUDY QUESTION Are infertile men with reduced semen quality at risk of a further decrease in testicular function? SUMMARY ANSWER Infertile men with severely reduced semen quality risk further deterioration of semen quality 15 years after treatment for infertility, and a lower baseline sperm concentration was associated with a more pronounced increase in LH and decrease in testosterone/LH ratio at follow-up. WHAT IS KNOWN ALREADY Male factors account for up to 50% of human infertility. The most common finding is spermatogenic failure (SgF) yet the life course of semen quality and testosterone production in such men has not been described. STUDY DESIGN, SIZE, DURATION A follow-up study of men with SgF was performed 15 years after the initial infertility assessment between January 1995 and December 2000. PARTICIPANTS/MATERIALS, SETTING, METHODS Hospital records were used to identify potential participants in the study. A total of 137 men with primary male infertility due to SgF and 70 controls with good semen quality from couples with female factor infertility who attended a tertiary referral centre were included: the participation rate was 31% and 26%, respectively. The men provided semen samples and underwent a physical examination. Blood samples were taken to measure levels of reproductive hormones (FSH, LH, testosterone, sex hormone-binding globulin, estradiol and inhibin B). Current results were compared with results from the initial assessments. MAIN RESULTS AND THE ROLE OF CHANCE At the time of follow up the SgF men had significantly lower Leydig cell capacity than the control group as well as much lower semen quality. For the SgF men, between baseline sampling and follow up, the median sperm concentration decreased from 1.9 to 0.6 mill/ml and total sperm count from 7.7 to 2.0 million (P = 0.019 and 0.012, respectively), and 10% developed azoospermia. Calculated free testosterone (cFT), but not total testosterone (tT) decreased in the SgF group by ~0.6% (95% CI 0.1-1.2%) per year. In the SgF group, LH increased by 1.6% (CI 0.9-2.3%) annually, and consequently tT/LH and cFT/LH ratios had decreased by 1.3% (CI 0.5-2.1) and 2.1% (CI 1.2-3.0%), respectively. The increase in LH and the decreases in tT/LH and cFT/LH ratios were more pronounced in men with lower baseline sperm concentrations. LIMITATIONS, REASONS FOR CAUTION We consider the case group as representative of infertile men not in need of testosterone treatment at baseline investigation, but do not have information on those that chose not to participate in the follow-up study. There were alterations in some hormone analysis methods during the follow-up period that may introduce uncertainty in interpretation of long-term changes in hormone levels despite rigorous quality control. The validity of the control group suffers from a lack of hormone values at baseline. Also, at follow-up, for practical reasons only one semen sample could be obtained, which makes the effect estimate more uncertain and there is a risk of non-differential misclassification. WIDER IMPLICATIONS OF THE FINDINGS Without being able to predict individual outcomes, it is prudent to consider sperm cryopreservation or advise not to postpone fertility treatment when men present with infertility due to impaired semen quality. Whether partly compensated Leydig cell insufficiency in men with SgF will eventually develop into overt testosterone deficiency cannot be determined from our study. STUDY FUNDING/COMPETING INTEREST(s) Aase and Einar Danielsen (Grant no. 10-001053), Nordic Research Committee (Grant no. 5109), The Kirsten and Freddie Johansen Fund, and Rigshospitalet's Research Fund (grant no. R24-A812). There are no competing interests.
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Affiliation(s)
- I A Olesen
- University Department of Growth and Reproduction, Rigshospitalet section 5064, Blegdamsvej 9, Copenhagen Ø, Denmark.,International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet section 5064, Blegdamsvej 9, Copenhagen Ø, Denmark
| | - U N Joensen
- University Department of Growth and Reproduction, Rigshospitalet section 5064, Blegdamsvej 9, Copenhagen Ø, Denmark.,International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet section 5064, Blegdamsvej 9, Copenhagen Ø, Denmark
| | - J H Petersen
- University Department of Growth and Reproduction, Rigshospitalet section 5064, Blegdamsvej 9, Copenhagen Ø, Denmark.,International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet section 5064, Blegdamsvej 9, Copenhagen Ø, Denmark.,Department of Biostatistics, Institute of Public Health, University of Copenhagen, Øster Farimagsgade 5 Building 10, Copenhagen K, Denmark
| | - K Almstrup
- University Department of Growth and Reproduction, Rigshospitalet section 5064, Blegdamsvej 9, Copenhagen Ø, Denmark.,International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet section 5064, Blegdamsvej 9, Copenhagen Ø, Denmark
| | - E Rajpert-De Meyts
- University Department of Growth and Reproduction, Rigshospitalet section 5064, Blegdamsvej 9, Copenhagen Ø, Denmark.,International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet section 5064, Blegdamsvej 9, Copenhagen Ø, Denmark
| | - E Carlsen
- University Department of Fertility, Rigshospitalet section 4071, Blegdamsvej 9, Copenhagen Ø, Denmark
| | - R McLachlan
- Hudson Institute of Medical Research and Monash University, 27-31 Wright St, Clayton, Australia
| | - A Juul
- University Department of Growth and Reproduction, Rigshospitalet section 5064, Blegdamsvej 9, Copenhagen Ø, Denmark.,International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet section 5064, Blegdamsvej 9, Copenhagen Ø, Denmark
| | - N Jørgensen
- University Department of Growth and Reproduction, Rigshospitalet section 5064, Blegdamsvej 9, Copenhagen Ø, Denmark.,International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet section 5064, Blegdamsvej 9, Copenhagen Ø, Denmark
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159
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Kant K, Tomar AK, Singh S, Yadav S. Ageing associated proteomic variations in seminal plasma of Indian men. JOURNAL OF PROTEINS AND PROTEOMICS 2019. [DOI: 10.1007/s42485-019-00013-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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160
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Sepil I, Hopkins BR, Dean R, Thézénas ML, Charles PD, Konietzny R, Fischer R, Kessler BM, Wigby S. Quantitative Proteomics Identification of Seminal Fluid Proteins in Male Drosophila melanogaster. Mol Cell Proteomics 2019; 18:S46-S58. [PMID: 30287546 PMCID: PMC6427238 DOI: 10.1074/mcp.ra118.000831] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 07/12/2018] [Indexed: 12/21/2022] Open
Abstract
Seminal fluid contains some of the fastest evolving proteins currently known. These seminal fluid proteins (Sfps) play crucial roles in reproduction, such as supporting sperm function, and particularly in insects, modifying female physiology and behavior. Identification of Sfps in small animals is challenging, and often relies on samples taken from the female reproductive tract after mating. A key pitfall of this method is that it might miss Sfps that are of low abundance because of dilution in the female-derived sample or rapid processing in females. Here we present a new and complementary method, which provides added sensitivity to Sfp identification. We applied label-free quantitative proteomics to Drosophila melanogaster, male reproductive tissue - where Sfps are unprocessed, and highly abundant - and quantified Sfps before and immediately after mating, to infer those transferred during copulation. We also analyzed female reproductive tracts immediately before and after copulation to confirm the presence and abundance of known and candidate Sfps, where possible. Results were cross-referenced with transcriptomic and sequence databases to improve confidence in Sfp detection. Our data were consistent with 125 previously reported Sfps. We found nine high-confidence novel candidate Sfps, which were both depleted in mated versus, unmated males and identified within the reproductive tract of mated but not virgin females. We also identified 42 more candidates that are likely Sfps based on their abundance, known expression and predicted characteristics, and revealed that four proteins previously identified as Sfps are at best minor contributors to the ejaculate. The estimated copy numbers for our candidate Sfps were lower than for previously identified Sfps, supporting the idea that our technique provides a deeper analysis of the Sfp proteome than previous studies. Our results demonstrate a novel, high-sensitivity approach to the analysis of seminal fluid proteomes, whose application will further our understanding of reproductive biology.
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Affiliation(s)
- Irem Sepil
- From the ‡Edward Grey Institute, Department of Zoology, University of Oxford, Oxford, UK;.
| | - Ben R Hopkins
- From the ‡Edward Grey Institute, Department of Zoology, University of Oxford, Oxford, UK
| | - Rebecca Dean
- Department of Genetics, Evolution and Environment, University College London, London, UK
| | - Marie-Laëtitia Thézénas
- TDI Mass Spectrometry Laboratory, Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Philip D Charles
- TDI Mass Spectrometry Laboratory, Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Rebecca Konietzny
- TDI Mass Spectrometry Laboratory, Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Roman Fischer
- TDI Mass Spectrometry Laboratory, Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Benedikt M Kessler
- TDI Mass Spectrometry Laboratory, Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Stuart Wigby
- From the ‡Edward Grey Institute, Department of Zoology, University of Oxford, Oxford, UK
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161
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Khakpour S, Sadeghi E, Tavalaee M, Bahadorani M, Nasr‐Esfahani MH. Zeta method: A noninvasive method based on membrane charge for selecting spermatozoa expressing high level of phospholipaseCζ. Andrologia 2019; 51:e13249. [DOI: 10.1111/and.13249] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 12/19/2018] [Accepted: 01/14/2019] [Indexed: 12/26/2022] Open
Affiliation(s)
- Shima Khakpour
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology ACECR Isfahan Iran
| | - Elham Sadeghi
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology ACECR Isfahan Iran
| | - Marziyeh Tavalaee
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology ACECR Isfahan Iran
| | | | - Mohammad H. Nasr‐Esfahani
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology ACECR Isfahan Iran
- Isfahan Fertility and Infertility Center Isfahan Iran
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162
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Lee D, Jee BC. Evaluation of normal morphology, DNA fragmentation, and hyaluronic acid binding ability of human spermatozoa after using four different commercial media for density gradient centrifugation. Clin Exp Reprod Med 2019; 46:8-13. [PMID: 30827072 PMCID: PMC6436464 DOI: 10.5653/cerm.2019.46.1.8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 11/22/2018] [Indexed: 01/05/2023] Open
Abstract
Objective Density gradient centrifugation (DGC) is frequently used to isolate high-motility fractions of spermatozoa. We compared the efficacy of four DGC media in terms of the percentage of morphologically normal spermatozoa, DNA fragmentation level, and hyaluronic acid (HA) binding ability. Methods Thirty men with a total motile spermatozoa count >80 million participated. Semen samples were divided into four aliquots, which were processed using PureSperm, PureCeption, Sidney, and SpermGrad media, respectively. The DNA fragmentation level was measured using the Halosperm assay kit and HA binding ability was measured using the HBA assay kit. Results The mean percentage of morphologically normal spermatozoa was significantly enhanced after DGC using all four media (10.3%, 9.9%, 9.8%, and 10.7%, respectively; p<0.05 for each when compared with 6.9% in raw semen). The DNA fragmentation level was significantly reduced after DGC using PureSperm, PureCeption, and SpermGrad media (6.0%, 6.5%, and 4.9%, respectively; p<0.05 for each when compared with 11.2% in raw semen), but not after DGC using Sidney media (8.5%, p>0.05). HA binding ability did not change after DGC using any of the four media. Conclusion The four media were equally effective for obtaining a sperm fraction with highly motile, morphologically normal sperm. PureSperm, PureCeption, and SpermGrad media were equally effective for acquiring a sperm fraction with less DNA fragmentation.
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Affiliation(s)
- Dayong Lee
- Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Byung Chul Jee
- Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital, Seongnam, Korea
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163
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Verón GL, Tissera AD, Bello R, Beltramone F, Estofan G, Molina RI, Vazquez-Levin MH. Impact of age, clinical conditions, and lifestyle on routine semen parameters and sperm kinematics. Fertil Steril 2019; 110:68-75.e4. [PMID: 29980266 DOI: 10.1016/j.fertnstert.2018.03.016] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 01/31/2018] [Accepted: 03/09/2018] [Indexed: 01/23/2023]
Abstract
OBJECTIVE To assess the impact of aging on routine semen and computer-assisted sperm analysis (CASA) motility parameters according to the current World Health Organization guidelines; and to evaluate the effect of obesity and lifestyle (alcohol consumption, cigarette smoking) in older men's semen. DESIGN Blind cross-sectional study. SETTING Research laboratory and andrology and reproduction laboratory. PATIENT(S) A population of 11,706 men. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) Semen analysis: routine (semen volume, sperm concentration and count, motility, vitality, morphology, hypo-osmotic swelling test, round and peroxidase-positive cell concentration) and CASA (straight-line velocity, curvilinear velocity, average path velocity, linearity, straightness, beat cross frequency, wobble, amplitude of lateral head displacement, and mean angular displacement) parameters; and body mass index. RESULT(S) A negative correlation was found between age and routine semen parameters: volume, sperm count, motility, vitality, total motile spermatozoa and normal-motile spermatozoa, round cell concentration, and hypo-osmotic swelling test values. Several CASA variables (straight-line velocity, curvilinear velocity, average path velocity, beat cross frequency, amplitude of lateral head displacement, and mean angular displacement) were also negatively affected. Using 40 years as a cut-off value, significant differences in most parameters correlated to age. In a selected subpopulation of men unexposed to known fertility-compromising factors, the same evaluations were performed, finding some parameters still decreased. Although obesity exerted a significant deleterious effect on older patients' semen quality, alcohol consumption and cigarette smoking mildly affected it. CONCLUSION(S) Male aging, with the contribution of unhealthy conditions, are paramount effectors of sperm quality deterioration.
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Affiliation(s)
- Gustavo Luis Verón
- Instituto de Biología y Medicina Experimental (IBYME), National Research Council of Argentina (CONICET)-Fundación IBYME (FIBYME), Buenos Aires, Argentina
| | | | - Ricardo Bello
- Universidad de Tres de Febrero, Buenos Aires, Argentina
| | - Fernando Beltramone
- Centro Integral de Ginecología, Obstetricia y Reproducción (CIGOR), Córdoba, Argentina
| | - Gustavo Estofan
- Centro Integral de Ginecología, Obstetricia y Reproducción (CIGOR), Córdoba, Argentina
| | | | - Mónica Hebe Vazquez-Levin
- Instituto de Biología y Medicina Experimental (IBYME), National Research Council of Argentina (CONICET)-Fundación IBYME (FIBYME), Buenos Aires, Argentina.
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164
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Brandt JS, Cruz Ithier MA, Rosen T, Ashkinadze E. Advanced paternal age, infertility, and reproductive risks: A review of the literature. Prenat Diagn 2019; 39:81-87. [DOI: 10.1002/pd.5402] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 11/18/2018] [Accepted: 11/30/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Justin S. Brandt
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Maternal Fetal Medicine; Rutgers Robert Wood Johnson Medical School; New Brunswick New Jersey
| | - Mayra A. Cruz Ithier
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Maternal Fetal Medicine; Rutgers Robert Wood Johnson Medical School; New Brunswick New Jersey
| | - Todd Rosen
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Maternal Fetal Medicine; Rutgers Robert Wood Johnson Medical School; New Brunswick New Jersey
| | - Elena Ashkinadze
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Maternal Fetal Medicine; Rutgers Robert Wood Johnson Medical School; New Brunswick New Jersey
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165
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Johnson SL, Zellhuber-McMillan S, Gillum J, Dunleavy J, Evans JP, Nakagawa S, Gemmell NJ. Evidence that fertility trades off with early offspring fitness as males age. Proc Biol Sci 2019; 285:rspb.2017.2174. [PMID: 29367392 DOI: 10.1098/rspb.2017.2174] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 12/21/2017] [Indexed: 12/29/2022] Open
Abstract
Models of ageing predict that sperm function and fertility should decline with age as sperm are exposed to free radical damage and mutation accumulation. However, theory also suggests that mating with older males should be beneficial for females because survival to old age is a demonstration of a male's high genetic and/or phenotypic quality. Consequently, declines in sperm fitness may be offset by indirect fitness benefits exhibited in offspring. While numerous studies have investigated age-based declines in male fertility, none has taken the integrated approach of studying age-based effects on both male fertility and offspring fitness. Here, using a cohort-based longitudinal study of zebrafish (Danio rerio), we report a decline in male mating success and fertility with male age but also compensating indirect benefits. Using in vitro fertilization, we show that offspring from older males exhibit superior early survival compared to those from their youngest counterparts. These findings suggest that the high offspring fitness observed for the subset of males that survive to an old age (approx. 51% in this study) may represent compensating benefits for declining fertility with age, thus challenging widely held views about the fitness costs of mating with older males.
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Affiliation(s)
- Sheri L Johnson
- Department of Zoology, University of Otago, Dunedin 9054, New Zealand .,Department of Anatomy, University of Otago, Dunedin 9054, New Zealand.,Allan Wilson Centre, University of Otago, Dunedin 9054, New Zealand
| | | | - Joanne Gillum
- Department of Anatomy, University of Otago, Dunedin 9054, New Zealand
| | - Jessica Dunleavy
- Department of Anatomy, University of Otago, Dunedin 9054, New Zealand
| | - Jonathan P Evans
- Centre for Evolutionary Biology, University of Western Australia, Crawley 6009, Australia
| | - Shinichi Nakagawa
- Department of Zoology, University of Otago, Dunedin 9054, New Zealand.,Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney 2052, Australia
| | - Neil J Gemmell
- Department of Anatomy, University of Otago, Dunedin 9054, New Zealand.,Allan Wilson Centre, University of Otago, Dunedin 9054, New Zealand
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166
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Sperm DNA Fragmentation: Mechanisms of Origin. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1166:75-85. [DOI: 10.1007/978-3-030-21664-1_5] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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167
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Racial and Sociodemographic Differences of Semen Parameters Among US Men Undergoing a Semen Analysis. Urology 2019; 123:126-132. [DOI: 10.1016/j.urology.2018.09.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 09/13/2018] [Accepted: 09/25/2018] [Indexed: 11/20/2022]
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168
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Mayo JA, Lu Y, Stevenson DK, Shaw GM, Eisenberg ML. Parental age and stillbirth: a population-based cohort of nearly 10 million California deliveries from 1991 to 2011. Ann Epidemiol 2018; 31:32-37.e2. [PMID: 30642694 DOI: 10.1016/j.annepidem.2018.12.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 11/15/2018] [Accepted: 12/01/2018] [Indexed: 12/27/2022]
Abstract
PURPOSE Parental age at delivery in the United States has been rising. Advanced maternal and paternal ages have been associated with adverse pregnancy outcomes including stillbirth. However, these relationships come from studies that often do not present results for both mother and father concurrently. The purpose of this study was to estimate the risk of stillbirth for maternal and paternal age in the same cohort of deliveries. METHODS This is a population-based cohort study of all live birth and stillbirth deliveries in California from 1991 to 2011. The individual associations between maternal and paternal ages and stillbirth were estimated with hazard ratios from Cox proportional hazard models. Age was modeled continuously with restricted cubic splines to account for nonlinear relationships. Mean parental age was used as the referent group. RESULTS J-shaped associations between maternal and paternal ages were observed in crude models where older mothers and fathers had the highest hazard ratios for stillbirth. In maternal models, after adjusting for maternal and paternal covariates, young maternal age no longer showed increased hazard ratio for stillbirth, whereas the association with older mothers remained. In adjusted paternal models, the relationship between young paternal age and stillbirth was unchanged while the hazard ratio for older fathers was slightly smaller. CONCLUSIONS After adjusting for both parents' age, education, race/ethnicity, along with parity, older mothers and fathers were independently associated with elevated hazard ratios for stillbirth.
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Affiliation(s)
- Jonathan A Mayo
- March of Dimes Prematurity Research Center, Division of Neonatal and Developmental Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA.
| | - Ying Lu
- Department of Biomedical Data Science, Stanford University School of Medicine, Stanford, CA
| | - David K Stevenson
- March of Dimes Prematurity Research Center, Division of Neonatal and Developmental Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA
| | - Gary M Shaw
- March of Dimes Prematurity Research Center, Division of Neonatal and Developmental Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA
| | - Michael L Eisenberg
- Departments of Urology and Obstetrics/Gynecology, Stanford University School of Medicine, Stanford, CA
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169
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Diogo P, Martins G, Eufrásio A, Silva T, Cabrita E, Gavaia P. Selection Criteria of Zebrafish Male Donors for Sperm Cryopreservation. Zebrafish 2018; 16:189-196. [PMID: 30523745 DOI: 10.1089/zeb.2018.1660] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Selection criteria for sperm cryopreservation are highly relevant in zebrafish since sperm quality is particularly variable in this species. Successful cryopreservation depends on high-quality sperm, which can only be ensured by the selection of breeders. Consequently, male selection and management are a priority to improve cryopreservation, and therefore, this study aimed to characterize optimal age and sperm collection frequency in zebrafish. For this purpose, males from wild type (AB) and from a transgenic line [Tg(runx2:eGFP)] were sampled at 6, 8, 12, and 14 months. For each age, sperm were collected at time 0 followed by samplings at 2, 7, and 14 days of rest. Sperm quality was assessed according to motility and membrane viability parameters. Quality assessment showed that Tg(runx2:eGFP) displayed significantly higher motility than AB and younger males showed higher motility in both lines. Sperm collection frequency affected membrane viability. While AB fish recovered sperm viability after 14 days of rest, Tg(runx2:eGFP) could not recover. Consequently, it may be important to study the sperm quality of each zebrafish line before sperm cryopreservation. Taking into consideration the results achieved in both lines, sperm collection should be performed between 6 and 8 months of age with a minimum collection interval of 14 days.
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Affiliation(s)
- Patrícia Diogo
- 1 Faculty of Sciences and Technology, University of Algarve, Faro, Portugal.,2 Centre of Marine Sciences, University of Algarve, Faro, Portugal
| | - Gil Martins
- 2 Centre of Marine Sciences, University of Algarve, Faro, Portugal
| | - Ana Eufrásio
- 2 Centre of Marine Sciences, University of Algarve, Faro, Portugal
| | | | - Elsa Cabrita
- 1 Faculty of Sciences and Technology, University of Algarve, Faro, Portugal.,2 Centre of Marine Sciences, University of Algarve, Faro, Portugal
| | - Paulo Gavaia
- 2 Centre of Marine Sciences, University of Algarve, Faro, Portugal.,4 Department of Biomedical Sciences and Medicine, University of Algarve, Faro, Portugal
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170
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Punjabi U, Van Mulders H, Goovaerts I, Peeters K, Clasen K, Janssens P, Zemtsova O, De Neubourg D. Sperm DNA fragmentation in the total and vital fractions before and after density gradient centrifugation: Significance in male fertility diagnosis. Clin Biochem 2018; 62:47-54. [DOI: 10.1016/j.clinbiochem.2018.05.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 05/19/2018] [Indexed: 01/29/2023]
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171
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Ilacqua A, Izzo G, Emerenziani GP, Baldari C, Aversa A. Lifestyle and fertility: the influence of stress and quality of life on male fertility. Reprod Biol Endocrinol 2018; 16:115. [PMID: 30474562 PMCID: PMC6260894 DOI: 10.1186/s12958-018-0436-9] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 10/24/2018] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Male infertility is a widespread condition among couples. In about 50% of cases, couple infertility is attributable to the male partner, mainly due to a failure in spermatogenesis. In recent times, the crucial role that modifiable lifestyle factors play in the development of infertility have generated a growing interest in this field of study, i.e. aging, psychological stress, nutrition, physical activity, caffeine, high scrotal temperature, hot water, mobile telephone use. Several studies have investigated associations between semen quality and the presence of lifestyle stressors i.e. occupational, life events (war, earthquake, etc.) or couple infertility; overall, these studies provide evidence that semen quality is impaired by psychological stress. In this review, we will discuss the impact of quality of life (modifiable lifestyle factors) and psychological stress on male fertility. In addition, the role that increased scrotal temperature along with inappropriate nutritional and physical exercise attitudes exert on male fertility will be presented. CONCLUSION The decline of male fertility, particularly associated with advancing age, incorrect lifestyles and environmental factors plays an important role on natality, and its consequences on the future on human population makes this an important public health issue in this century. Thus, modification of lifestyle through a structured program of educational, environmental, nutritional/physical exercise and psychological support, combined with the use of nutraceutical antioxidants can prevent infertility and therefore, may help couples to obtain better quality of life and improved possibility to conceive spontaneously or optimize their chances of conception.
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Affiliation(s)
- Alessandro Ilacqua
- Department of Movement, Human and Health Sciences, Section of Health Sciences, University of Rome "Foro Italico", Rome, Italy
| | - Giulia Izzo
- Department of Experimental and Clinical Medicine, Magna Graecia University of Catanzaro, Catanzaro, Italy
| | - Gian Pietro Emerenziani
- Department of Experimental and Clinical Medicine, Magna Graecia University of Catanzaro, Catanzaro, Italy
| | | | - Antonio Aversa
- Department of Experimental and Clinical Medicine, Magna Graecia University of Catanzaro, Catanzaro, Italy.
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172
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Caballero-Campo P, Lin W, Simbulan R, Liu X, Feuer S, Donjacour A, Rinaudo PF. Advanced Paternal Age Affects Sperm Count and Anogenital Distance in Mouse Offspring. Reprod Sci 2018; 25:515-522. [PMID: 29554862 DOI: 10.1177/1933719118759441] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In Western society, couples increasingly delay parenthood until later in life. Overall, studies have focused on the reproductive performance of older parents or the impact of advanced maternal age on pregnancy outcomes, but few studies have examined how advanced paternal age (APA) affects offspring health. The aim of this study was to investigate the impact of increasing paternal age on offspring reproductive performance and long-term metabolic health in a mouse model. Here, the same adult B6D2F1/J male mice were mated at 4, 12, and 18 months of age with 6- to 10-week-old naturally cycling CF1 females to generate 3 offspring cohorts conceived at increasing paternal ages PA4, PA12, and PA18. The offspring resulting from mating the same fathers at different ages (n = 20 per age; 10 males and 10 females) were maintained up to 20 weeks of age and morphometric parameters, growth curve, and glucose tolerance were measured. We found that increasing paternal age was associated with a trend toward longer time to conception. Litter sizes were not significantly different. Reassuringly, metabolic parameters and growth curve were not different in the 3 cohorts of offspring. Most importantly, increased paternal age (PA4 vs PA18) was associated with a statistically significant decrease in sperm concentration, sperm motility, and anogenital distance in offspring. These changes raise concerns about the potential impact of APA on the reproductive fitness in males of the next generation.
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Affiliation(s)
- Pedro Caballero-Campo
- 1 Department of Obstetrics Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA.,2 Unidad de Reproducción Humana, Clínica y Fundación Tambre, Madrid, Spain.,3 Depto. Biología de la Reproducción, Instituto Nacional de Ciencias Biomédicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Wingka Lin
- 1 Department of Obstetrics Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA
| | - Rhodel Simbulan
- 1 Department of Obstetrics Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA
| | - Xiaowei Liu
- 1 Department of Obstetrics Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA
| | - Sky Feuer
- 1 Department of Obstetrics Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA
| | - Annemarie Donjacour
- 1 Department of Obstetrics Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA
| | - Paolo F Rinaudo
- 1 Department of Obstetrics Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA
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173
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Petersen CG, Mauri AL, Vagnini LD, Renzi A, Petersen B, Mattila M, Comar V, Ricci J, Dieamant F, Oliveira JBA, Baruffi RLR, Franco Jr. JG. The effects of male age on sperm DNA damage: an evaluation of 2,178 semen samples. JBRA Assist Reprod 2018; 22:323-330. [PMID: 30106542 PMCID: PMC6210622 DOI: 10.5935/1518-0557.20180047] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 06/30/2018] [Indexed: 11/20/2022] Open
Abstract
OBJECTIVE This study aimed to evaluate the effects of male age on sperm DNA damage. METHODS This cross-sectional study included semen samples collected from 2,178 men seen at an infertility clinic. For DNA integrity analysis, the proportions of spermatozoa showing DNA fragmentation (TUNEL assay), abnormal chromatin packaging/underprotamination (chromomycin A3), abnormal mitochondrial membrane potential (MMP/MitoTracker Green), and apoptosis (annexin V) were recorded. For group comparisons, enrolled subjects were divided into three groups based on their ages: ≤35 years; 36-44 years; and ≥45 years. The associations between age and sperm parameters were assessed using Spearman's rank correlation coefficient. RESULTS Although aging did not affect sperm apoptosis (p>.05), sperm DNA fragmentation and MMP deteriorated significantly with age (p<.05). Chromatin packaging/protamination improved significantly with age (p<.05). CONCLUSION Sperm DNA fragmentation worsened with age and was apparently associated with mitochondrial damage. The age-related increase in sperm DNA damage suggests that delaying childbearing, not only in women but also in men, might jeopardize a couple's reproductive capacity. The increase seen in chromatin packaging might represent a protective feature for DNA. However, additional studies must be performed to confirm the results concerning chromatin packaging/protamination.
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Affiliation(s)
- Claudia G. Petersen
- Center for Human Reproduction Prof. Franco Jr., Ribeirão
Preto, SP, Brazil
- Paulista Center for Diagnosis, Research, and Training,
Ribeirão Preto, SP, Brazil
| | - Ana L. Mauri
- Center for Human Reproduction Prof. Franco Jr., Ribeirão
Preto, SP, Brazil
- Paulista Center for Diagnosis, Research, and Training,
Ribeirão Preto, SP, Brazil
| | - Laura D. Vagnini
- Paulista Center for Diagnosis, Research, and Training,
Ribeirão Preto, SP, Brazil
| | - Adriana Renzi
- Paulista Center for Diagnosis, Research, and Training,
Ribeirão Preto, SP, Brazil
| | - Bruna Petersen
- Paulista Center for Diagnosis, Research, and Training,
Ribeirão Preto, SP, Brazil
| | - Mariana Mattila
- Center for Human Reproduction Prof. Franco Jr., Ribeirão
Preto, SP, Brazil
| | - Vanessa Comar
- Center for Human Reproduction Prof. Franco Jr., Ribeirão
Preto, SP, Brazil
| | - Juliana Ricci
- Center for Human Reproduction Prof. Franco Jr., Ribeirão
Preto, SP, Brazil
| | - Felipe Dieamant
- Center for Human Reproduction Prof. Franco Jr., Ribeirão
Preto, SP, Brazil
| | - Joao Batista A. Oliveira
- Center for Human Reproduction Prof. Franco Jr., Ribeirão
Preto, SP, Brazil
- Paulista Center for Diagnosis, Research, and Training,
Ribeirão Preto, SP, Brazil
| | - Ricardo L. R. Baruffi
- Center for Human Reproduction Prof. Franco Jr., Ribeirão
Preto, SP, Brazil
- Paulista Center for Diagnosis, Research, and Training,
Ribeirão Preto, SP, Brazil
| | - Jose G. Franco Jr.
- Center for Human Reproduction Prof. Franco Jr., Ribeirão
Preto, SP, Brazil
- Paulista Center for Diagnosis, Research, and Training,
Ribeirão Preto, SP, Brazil
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174
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Tidière M, Thevenot X, Deligiannopoulou A, Douay G, Whipple M, Siberchicot A, Gaillard JM, Lemaître JF. Maternal reproductive senescence shapes the fitness consequences of the parental age difference in ruffed lemurs. Proc Biol Sci 2018; 285:20181479. [PMID: 30209228 PMCID: PMC6158536 DOI: 10.1098/rspb.2018.1479] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 08/20/2018] [Indexed: 11/12/2022] Open
Abstract
In humans, pronounced age differences between parents have deleterious fitness consequences. In particular, the number of children is lower when mothers are much older than fathers. However, previous analyses failed to disentangle the influence of differential parental age per se from a direct age effect of each parent. In this study, we analyse the fitness consequences of both parental age and parental age differences on litter size and offspring survival in two closely related species of lemurs living in captivity. As captive lemurs do not choose their reproductive partner, we were able to measure litter size and offspring survival across breeding pairs showing a wide range of parental age differences. However, we demonstrated that the effect of the parental age difference on litter size was fully accounted for by female reproductive senescence because females mating with much younger males were old females. On the other hand, both parental age difference and female reproductive senescence influenced offspring survival. Our results emphasize the importance of teasing apart the effect of parental reproductive senescence when investigating the health and fitness consequences of parental age differences and also provide new insights for conservation programmes of endangered species.
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Affiliation(s)
- Morgane Tidière
- Université de Lyon, F-69000, Lyon; Université Lyon 1; CNRS, UMR5558, Laboratoire de Biométrie et Biologie Evolutive, F-69622 Villeurbanne, France
| | - Xavier Thevenot
- Université de Lyon, F-69000, Lyon; Université Lyon 1; CNRS, UMR5558, Laboratoire de Biométrie et Biologie Evolutive, F-69622 Villeurbanne, France
| | - Adamantia Deligiannopoulou
- Université de Lyon, F-69000, Lyon; Université Lyon 1; CNRS, UMR5558, Laboratoire de Biométrie et Biologie Evolutive, F-69622 Villeurbanne, France
| | - Guillaume Douay
- Wildlife Reserve Singapore, 80 Mandai Lake Road, Singapore 729826, Singapore
| | | | - Aurélie Siberchicot
- Université de Lyon, F-69000, Lyon; Université Lyon 1; CNRS, UMR5558, Laboratoire de Biométrie et Biologie Evolutive, F-69622 Villeurbanne, France
| | - Jean-Michel Gaillard
- Université de Lyon, F-69000, Lyon; Université Lyon 1; CNRS, UMR5558, Laboratoire de Biométrie et Biologie Evolutive, F-69622 Villeurbanne, France
| | - Jean-François Lemaître
- Université de Lyon, F-69000, Lyon; Université Lyon 1; CNRS, UMR5558, Laboratoire de Biométrie et Biologie Evolutive, F-69622 Villeurbanne, France
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175
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Xavier MJ, Mitchell LA, McEwan KE, Scott RJ, Aitken RJ. Genomic integrity in the male germ line: evidence in support of the disposable soma hypothesis. Reproduction 2018; 156:269-282. [DOI: 10.1530/rep-18-0202] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 06/18/2018] [Indexed: 01/06/2023]
Abstract
The Big Blue λSelect-cII selection system has been employed along with whole-exome sequencing to examine the susceptibility of the male germ line to mutation in two challenging situations (i) exposure to a chemotherapeutic regime including bleomycin, etoposide and cis-platinum (BEP) and (ii) the ageing process. A 3-week exposure to BEP induced complete azoospermia associated with a loss of developing germ cells and extensive vacuolization of Sertoli cell cytoplasm. Following cessation of treatment, spermatozoa first appeared in the caput epididymis after 6 weeks and by 12 weeks motile spermatozoa could be recovered from the cauda, although the count (P < 0.001) and motility (P < 0.01) of these cells were significantly reduced and superoxide generation was significantly elevated (P < 0.001). Despite this increase in free radical generation, no evidence of chromatin instability was detected in these spermatozoa. Furthermore, embryos obtained from females mated at this 12-week time point showed no evidence of an increased mutational load. Similarly, progressive ageing of Big Blue mice had no impact on the quality of the spermatozoa, fertility or mutation frequency in the offspring despite a significant increase in the mutational load carried by somatic tissues such as the liver (P < 0.05). We conclude that the male germ line is highly resistant to mutation in keeping with the disposable soma hypothesis, which posits that genetic integrity in the germ cells will be maintained at the expense of the soma, in light of the former’s sentinel position in safeguarding the stability of the genome.
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176
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Bremhorst V, Kreyenfeld M, Lambert P. Nonparametric double additive cure survival models: An application to the estimation of the non-linear effect of age at first parenthood on fertility progression. STAT MODEL 2018. [DOI: 10.1177/1471082x18784685] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This article introduces double additive models to describe the effect of continuous covariates in cure survival models, thereby relaxing the traditional linearity assumption in the two regression parts. This class of models extends the classical event history models when an unknown proportion of the population under study will never experience the event of interest. They are used on data from the German Socio-Economic Panel (GSOEP) to examine how age at first birth relates to the timing and quantum of fertility for given education levels of the respondents. It is shown that the conditional probability of having further children decreases with the mother's age at first birth. While the effect of age at first birth in the third birth's probability model is fairly linear, this is not the case for the second child with an accelerating decline detected for women that had their first kid beyond age 30.
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Affiliation(s)
- Vincent Bremhorst
- Université catholique de Louvain, Institut de Statistique, Biostatistique et Sciences Actuarielles, Louvain-la-Neuve, Belgium
| | | | - Philippe Lambert
- Université catholique de Louvain, Institut de Statistique, Biostatistique et Sciences Actuarielles, Louvain-la-Neuve, Belgium
- Université de Liège, Faculté des sciences sociales, Méthodes quantitatives en sciences sociales, Liège, Belgium
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177
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Sharkey DJ, Tremellen KP, Briggs NE, Dekker GA, Robertson SA. Seminal plasma pro-inflammatory cytokines interferon-γ (IFNG) and C-X-C motif chemokine ligand 8 (CXCL8) fluctuate over time within men. Hum Reprod 2018; 32:1373-1381. [PMID: 28541460 DOI: 10.1093/humrep/dex106] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 05/06/2017] [Indexed: 01/19/2023] Open
Abstract
STUDY QUESTION Do seminal plasma pro-inflammatory cytokines interferon-γ (IFNG) and C-X-C motif chemokine ligand 8 (CXCL8) vary within individual men over time? SUMMARY ANSWER IFNG exhibits substantial variation that is independent of duration of abstinence but correlates with lipopolysaccharide (LPS) content, while CXCL8 varies moderately in association with duration of abstinence. WHAT IS KNOWN ALREADY Pro-inflammatory cytokines IFNG and CXCL8 in seminal fluid can adversely impact male and female fertility. Other cytokines as well as sperm parameters fluctuate considerably within individuals over time, but whether IFNG and CXCL8 vary similarly, and the determinants of variance, are unknown. STUDY DESIGN, SIZE, DURATION Between two and seven semen samples were collected from 14 proven fertile donors at 6-10 week intervals over the course of ~12 months, to assess variation over time in cytokines and LPS, and to investigate relationships with sperm parameters and possible regulatory factors. PARTICIPANTS/MATERIALS, SETTING, METHODS The concentrations and total amounts per ejaculate of IFNG and CXCL8 were determined using commercial ELISA. Sperm parameters were assessed according to World Health Organization (WHO) IV standards and LPS was measured by limulus amebocyte lysate (LAL) assay. Mixed model analysis was utilized to determine the relative contribution of between- and within-individual factors in explaining variance. Relationships between cytokines, LPS and sperm parameters, as well as effect of age and duration of abstinence, were investigated by correlation analysis. MAIN RESULTS AND THE ROLE OF CHANCE Within-individual variability contributed to total variance particularly for both IFNG, CXCL8 and LPS, and was a stronger determinant than between-individual variability for IFNG and LPS. Normal sperm motility correlated inversely with CXCL8, and sperm concentration correlated inversely with LPS. Duration of abstinence was a determinant of total CXCL8, but not IFNG or LPS. Associations between LPS, IFNG and CXCL8 suggest IFNG and perhaps CXCL8 are influenced by microbial populations. LIMITATIONS, REASONS FOR CAUTION A limited number of donors from a single clinic were investigated. Clinical information on complete microbiology, BMI, nutrition, smoking and other lifestyle factors was unavailable. Further studies are required to determine whether the findings can be generalized to larger populations and different ethnicities. WIDER IMPLICATIONS OF THE FINDINGS These data reveal substantial variation over time in pro-inflammatory seminal fluid cytokines and imply existence of microbial or other environmental regulatory factors. STUDY FUNDING/COMPETING INTEREST(S) This study was supported by grants from the National Health and Medical Research Council of Australia. The authors have no competing interests to disclose.
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Affiliation(s)
- David J Sharkey
- Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide SA 5005, Australia
| | - Kelton P Tremellen
- School of Medicine, Flinders University, Adelaide SA 5001, Australia.,Repromed Pty Ltd, 180 Fullarton Road, Dulwich SA 5065, Australia
| | - Nancy E Briggs
- Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide SA 5005, Australia
| | - Gustaaf A Dekker
- Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide SA 5005, Australia.,Lyell McEwin Hospital, Elizabeth Vale, Adelaide SA 5112, Australia
| | - Sarah A Robertson
- Robinson Research Institute, Adelaide Medical School, University of Adelaide, Adelaide SA 5005, Australia
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178
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de Boer RA, Eens M, Müller W. Sex-specific effects of inbreeding on reproductive senescence. Proc Biol Sci 2018; 285:20180231. [PMID: 29794043 PMCID: PMC5998105 DOI: 10.1098/rspb.2018.0231] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 04/24/2018] [Indexed: 01/29/2023] Open
Abstract
Inbreeding depression plays a significant role in evolutionary biology and ecology. However, we lack a clear understanding of the fitness consequences of inbreeding depression. Studies often focus on short-term effects of inbreeding in juvenile offspring, whereas inbreeding depression in adult traits and the interplay between inbreeding depression and age are rarely addressed. Inbreeding depression may increase with age and accelerate the decline in reproductive output in ageing individuals (reproductive senescence), which could be subject to sex-specific dynamics. We test this hypothesis with a longitudinal experimental study in a short-lived songbird. Adult inbred and outbred male and female canaries were paired in a 2 × 2 factorial design, and survival and annual reproductive performance were studied for 3 years. We found inbreeding depression in female egg-laying ability, male fertilization success and survival of both sexes. Annual reproductive success of both males and females declined when paired with an inbred partner independent of their own inbreeding status. This shows that inbreeding can have fitness costs in outbred individuals when they mate with an inbred individual. Further, inbred females showed faster reproductive senescence than outbred females, confirming that inbreeding depression and age can interact to affect fitness. By contrast, there was no evidence for an interaction between inbreeding depression and reproductive senescence in male fertilization success. Our findings highlight the importance of considering sex-specific effects and age to determine the full range of fitness consequences of inbreeding and demonstrate that inbreeding depression can accelerate reproductive senescence.
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Affiliation(s)
- Raïssa A de Boer
- Behavioural Ecology and Ecophysiology Group, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Marcel Eens
- Behavioural Ecology and Ecophysiology Group, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Wendt Müller
- Behavioural Ecology and Ecophysiology Group, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
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179
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Abstract
PURPOSE OF REVIEW In many countries, the average age of paternity is rising. The negative effect of older age on fertility in women is well documented; however, less is known about the impact of paternal age on fecundity. In this review, we summarize the current knowledge of how paternal age affects semen parameters, reproductive success, and offspring health. RECENT FINDINGS Contemporary evidence confirms that aged men have worse semen parameters, including overall negative changes in sperm genetics. Reproductive outcomes with unassisted pregnancy tend to be worse with older fathers. While most current studies of assisted pregnancy do show a negative effect of paternal age, there are some conflicting results. Studies continue to show an overall increased risk of health problems, particularly neuropsychiatric conditions, in the offspring of older men. While men can often maintain fertility potential throughout a lifetime, increasing evidence indicates worsening of semen parameters, including sperm genetics, and potentially worse reproductive success. Older men should also be counseled on their offspring's possible increased risk of certain medical conditions.
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180
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Lotti F, Tamburrino L, Marchiani S, Maseroli E, Vitale P, Forti G, Muratori M, Maggi M, Baldi E. DNA fragmentation in two cytometric sperm populations: relationship with clinical and ultrasound characteristics of the male genital tract. Asian J Androl 2018; 19:272-279. [PMID: 26924281 PMCID: PMC5427780 DOI: 10.4103/1008-682x.174854] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
We investigated whether DNA fragmentation in two cytometric sperm populations (PIdimmer and PIbrighter) with different biological characteristics and clinical relevance is related to clinical and color-Doppler ultrasound (CDUS) parameters of the male genital tract. One hundred and sixty males of infertile couples without genetic abnormalities were evaluated for clinical, scrotal, and transrectal CDUS characteristics, presence of prostatitis-like symptoms (with the National Institutes of Health-Chronic Prostatitis Symptom Index) and sperm DNA fragmentation (sDF) in PIdimmer and PIbrighter populations (using TUNEL/PI method coupled with flow cytometry). Data were adjusted for age (Model 1) along with waistline, testosterone levels, smoking habit, and sexual abstinence (Model 2). According to the statistical Model 2, PIdimmer sDF was associated with testicular abnormalities, including lower clinical and ultrasound volume (r = -0.21 and r = -0.20, respectively; P < 0.05), higher FSH levels (r = 0.34, P < 0.0001) and occurrence of testicular inhomogeneity (P < 0.05) and hypoechogenicity (P < 0.05). PIbrighter sDF was associated with prostate-related symptoms and abnormal signs, including higher NIH-CPSI total and subdomain scores, a higher prevalence of prostatitis-like symptoms and of CDUS alterations such as macro-calcifications, severe echo-texture inhomogeneity, hyperemia (all P < 0.05), and higher arterial peak systolic velocity (r = 0.25, P < 0.05). Our results suggest that DNA fragmentation in PIdimmer sperm, which is related to poor semen quality, mainly originates in the testicles, likely due to apoptosis. Conversely, DNA fragmentation in PIbrighter sperm appears to mainly originate during or after transit through the prostate, increasing with the presence of an inflammatory status of the organ. These results could lead to new perspectives for the identification of therapeutic targets to reduce sDF.
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Affiliation(s)
- Francesco Lotti
- Sexual Medicine and Andrology Unit, Department of Experimental and Clinical Biomedical Sciences, Center of Excellence DeNothe, University of Florence, Viale Pieraccini 6, I-50036, Florence, Italy
| | - Lara Tamburrino
- Sexual Medicine and Andrology Unit, Department of Experimental and Clinical Biomedical Sciences, Center of Excellence DeNothe, University of Florence, Viale Pieraccini 6, I-50036, Florence, Italy
| | - Sara Marchiani
- Sexual Medicine and Andrology Unit, Department of Experimental and Clinical Biomedical Sciences, Center of Excellence DeNothe, University of Florence, Viale Pieraccini 6, I-50036, Florence, Italy
| | - Elisa Maseroli
- Sexual Medicine and Andrology Unit, Department of Experimental and Clinical Biomedical Sciences, Center of Excellence DeNothe, University of Florence, Viale Pieraccini 6, I-50036, Florence, Italy
| | - Pasquale Vitale
- Sexual Medicine and Andrology Unit, Department of Experimental and Clinical Biomedical Sciences, Center of Excellence DeNothe, University of Florence, Viale Pieraccini 6, I-50036, Florence, Italy
| | - Gianni Forti
- Sexual Medicine and Andrology Unit, Department of Experimental and Clinical Biomedical Sciences, Center of Excellence DeNothe, University of Florence, Viale Pieraccini 6, I-50036, Florence, Italy
| | - Monica Muratori
- Sexual Medicine and Andrology Unit, Department of Experimental and Clinical Biomedical Sciences, Center of Excellence DeNothe, University of Florence, Viale Pieraccini 6, I-50036, Florence, Italy
| | - Mario Maggi
- Sexual Medicine and Andrology Unit, Department of Experimental and Clinical Biomedical Sciences, Center of Excellence DeNothe, University of Florence, Viale Pieraccini 6, I-50036, Florence, Italy
| | - Elisabetta Baldi
- Sexual Medicine and Andrology Unit, Department of Experimental and Clinical Biomedical Sciences, Center of Excellence DeNothe, University of Florence, Viale Pieraccini 6, I-50036, Florence, Italy
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181
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Durairajanayagam D. Lifestyle causes of male infertility. Arab J Urol 2018; 16:10-20. [PMID: 29713532 PMCID: PMC5922227 DOI: 10.1016/j.aju.2017.12.004] [Citation(s) in RCA: 146] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 12/05/2017] [Accepted: 12/12/2017] [Indexed: 01/08/2023] Open
Abstract
Objective To examine the potential effects of lifestyle factors on male reproductive health. Evidence of a global decline in human sperm quality over recent decades has been accumulating. Environmental, occupational, and modifiable lifestyle factors may contribute to this decline. This review focuses on key lifestyle factors that are associated with male infertility such as smoking cigarettes, alcohol intake, use of illicit drugs, obesity, psychological stress, advanced paternal age, dietary practices, and coffee consumption. Other factors such as testicular heat stress, intense cycling training, lack of sleep and exposure to electromagnetic radiation from mobile phone use are briefly discussed. Materials and method A comprehensive literature search was performed to identify and synthesise all relevant information, mainly from within the last decade, on the major lifestyle factors associated with male infertility and semen quality. Database searches were limited to reports published in English only. A manual search of bibliographies of the reports retrieved was conducted to identify additional relevant articles. Results In all, 1012 articles were identified from the database search and after reviewing the titles and abstract of the reports, 104 articles met the inclusion criteria. Of these, 30 reports were excluded as the full-text could not be retrieved and the abstract did not have relevant data. The remaining 74 reports were reviewed for data on association between a particular lifestyle factor and male infertility and were included in the present review. Conclusion The major lifestyle factors discussed in the present review are amongst the multiple potential risk factors that could impair male fertility. However, their negative impact may well be mostly overcome by behaviour modification and better lifestyle choices. Greater awareness and recognition of the possible impact of these lifestyle factors are important amongst couples seeking conception.
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Key Words
- AAS, anabolic–androgenic steroids
- APA, advanced paternal age
- ART, assisted reproductive technology
- ASIH, anabolic steroid-induced hypogonadism
- BMI, body mass index
- Chk1, checkpoint kinase 1
- ECS, endogenous cannabinoid system
- GnIH, gonadotropin-inhibitory hormone
- HADS, Hospital Anxiety and Depression Score
- HPA, hypothalamus–pituitary–adrenal
- HPG, hypothalamus–pituitary–gonadal
- ICSI, intracytoplasmic sperm injection
- IUI, intrauterine insemination
- IVF, in vitro fertilisation
- Lifestyle
- MMP, mitochondrial membrane potential
- Male infertility
- ROS, reactive oxygen species
- Risk factors
- SOD, superoxide dismutase
- Semen quality
- Sperm DNA fragmentation
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Affiliation(s)
- Damayanthi Durairajanayagam
- Address: Discipline of Physiology, Faculty of Medicine, Sungai Buloh Campus, Universiti Teknologi MARA, Jalan Hospital, 47000 Sungai Buloh, Selangor, Malaysia. Fax: +60 3 6126 5224.
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182
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Rollings N, Uhrig EJ, Krohmer RW, Waye HL, Mason RT, Olsson M, Whittington CM, Friesen CR. Age-related sex differences in body condition and telomere dynamics of red-sided garter snakes. Proc Biol Sci 2018; 284:rspb.2016.2146. [PMID: 28381620 DOI: 10.1098/rspb.2016.2146] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 03/06/2017] [Indexed: 12/15/2022] Open
Abstract
Life-history strategies vary dramatically between the sexes, which may drive divergence in sex-specific senescence and mortality rates. Telomeres are tandem nucleotide repeats that protect the ends of chromosomes from erosion during cell division. Telomeres have been implicated in senescence and mortality because they tend to shorten with stress, growth and age. We investigated age-specific telomere length in female and male red-sided garter snakes, Thamnophis sirtalis parietalis We hypothesized that age-specific telomere length would differ between males and females given their divergent reproductive strategies. Male garter snakes emerge from hibernation with high levels of corticosterone, which facilitates energy mobilization to fuel mate-searching, courtship and mating behaviours during a two to four week aphagous breeding period at the den site. Conversely, females remain at the dens for only about 4 days and seem to invest more energy in growth and cellular maintenance, as they usually reproduce biennially. As male investment in reproduction involves a yearly bout of physiologically stressful activities, while females prioritize self-maintenance, we predicted male snakes would experience more age-specific telomere loss than females. We investigated this prediction using skeletochronology to determine the ages of individuals and qPCR to determine telomere length in a cross-sectional study. For both sexes, telomere length was positively related to body condition. Telomere length decreased with age in male garter snakes, but remained stable in female snakes. There was no correlation between telomere length and growth in either sex, suggesting that our results are a consequence of divergent selection on life histories of males and females. Different selection on the sexes may be the physiological consequence of the sexual dimorphism and mating system dynamics displayed by this species.
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Affiliation(s)
- Nicky Rollings
- School of Life and Environmental Sciences, University of Sydney, Heydon-Laurence Building (A08), New South Wales 2006, Australia
| | - Emily J Uhrig
- Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden.,Department of Integrative Biology, Oregon State University, Corvallis, OR, USA
| | - Randolph W Krohmer
- Department of Biological Sciences, Saint Xavier University, Chicago, IL, USA
| | - Heather L Waye
- Division of Science and Mathematics, University of Minnesota, Morris, MN, USA
| | - Robert T Mason
- Department of Integrative Biology, Oregon State University, Corvallis, OR, USA
| | - Mats Olsson
- Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden
| | - Camilla M Whittington
- School of Life and Environmental Sciences, University of Sydney, Heydon-Laurence Building (A08), New South Wales 2006, Australia.,Sydney School of Veterinary Science, Faculty of Science, University of Sydney, Sydney, Australia
| | - Christopher R Friesen
- School of Life and Environmental Sciences, University of Sydney, Heydon-Laurence Building (A08), New South Wales 2006, Australia
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183
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Sansone A, Di Dato C, de Angelis C, Menafra D, Pozza C, Pivonello R, Isidori A, Gianfrilli D. Smoke, alcohol and drug addiction and male fertility. Reprod Biol Endocrinol 2018; 16:3. [PMID: 29334961 PMCID: PMC5769315 DOI: 10.1186/s12958-018-0320-7] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 01/02/2018] [Indexed: 01/17/2023] Open
Abstract
In recent decades, the decline in human fertility has become increasingly more worrying: while therapeutic interventions might help, they are vexing for the couple and often burdened with high failure rates and costs. Prevention is the most successful approach to fertility disorders in males and females alike. We performed a literature review on three of the most common unhealthy habits - tobacco, alcohol and drug addiction - and their reported effects on male fertility. Tobacco smoking is remarkably common in most first-world countries; despite a progressive decline in the US, recent reports suggest a prevalence of more than 30% in subjects of reproductive age - a disturbing perspective, given the well-known ill-effects on reproductive and sexual function as well as general health. Alcohol consumption is often considered socially acceptable, but its negative effects on gonadal function have been consistently reported in the last 30 years. Several studies have reported a variety of negative effects on male fertility following drug abuse - a worrying phenomenon, as illicit drug consumption is on the rise, most notably in younger subjects. While evidence in these regards is still far from solid, mostly as a result of several confounding factors, it is safe to assume that cessation of tobacco smoking, alcohol consumption and recreational drug addiction might represent the best course of action for any couple trying to achieve pregnancy.
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Affiliation(s)
- Andrea Sansone
- Department of Experimental Medicine, Section of Medical Pathophysiology, Food Science and Endocrinology, Sapienza - University of Rome, Viale Regina Elena 324, 00161, Rome, Italy.
| | - Carla Di Dato
- Department of Experimental Medicine, Section of Medical Pathophysiology, Food Science and Endocrinology, Sapienza - University of Rome, Viale Regina Elena 324, 00161, Rome, Italy
| | - Cristina de Angelis
- I.O.S.& COLEMAN Srl, Naples, Italy
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università "Federico II" di Napoli, Naples, Italy
| | - Davide Menafra
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università "Federico II" di Napoli, Naples, Italy
| | - Carlotta Pozza
- Department of Experimental Medicine, Section of Medical Pathophysiology, Food Science and Endocrinology, Sapienza - University of Rome, Viale Regina Elena 324, 00161, Rome, Italy
| | - Rosario Pivonello
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università "Federico II" di Napoli, Naples, Italy
| | - Andrea Isidori
- Department of Experimental Medicine, Section of Medical Pathophysiology, Food Science and Endocrinology, Sapienza - University of Rome, Viale Regina Elena 324, 00161, Rome, Italy
| | - Daniele Gianfrilli
- Department of Experimental Medicine, Section of Medical Pathophysiology, Food Science and Endocrinology, Sapienza - University of Rome, Viale Regina Elena 324, 00161, Rome, Italy
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184
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Schlegel PN. Male factors affect success of assisted reproductive technology. Fertil Steril 2017; 108:952. [PMID: 29202970 DOI: 10.1016/j.fertnstert.2017.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 09/05/2017] [Indexed: 10/18/2022]
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185
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Wesselink AK, Rothman KJ, Hatch EE, Mikkelsen EM, Sørensen HT, Wise LA. Age and fecundability in a North American preconception cohort study. Am J Obstet Gynecol 2017; 217:667.e1-667.e8. [PMID: 28917614 PMCID: PMC5712257 DOI: 10.1016/j.ajog.2017.09.002] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 08/18/2017] [Accepted: 09/06/2017] [Indexed: 11/17/2022]
Abstract
BACKGROUND There is a well-documented decline in fertility treatment success with increasing female age; however, there are few preconception cohort studies that have examined female age and natural fertility. In addition, data on male age and fertility are inconsistent. Given the increasing number of couples who are attempting conception at older ages, a more detailed characterization of age-related fecundability in the general population is of great clinical utility. OBJECTIVE The purpose of this study was to examine the association between female and male age with fecundability. STUDY DESIGN We conducted a web-based preconception cohort study of pregnancy planners from the United States and Canada. Participants were enrolled between June 2013 and July 2017. Eligible participants were 21-45 years old (female) or ≥21 years old (male) and had not been using fertility treatments. Couples were followed until pregnancy or for up to 12 menstrual cycles. We analyzed data from 2962 couples who had been trying to conceive for ≤3 cycles at study entry and reported no history of infertility. We used life-table methods to estimate the unadjusted cumulative pregnancy proportion at 6 and 12 cycles by female and male age. We used proportional probabilities regression models to estimate fecundability ratios, the per-cycle probability of conception for each age category relative to the referent (21-24 years old), and 95% confidence intervals. RESULTS Among female patients, the unadjusted cumulative pregnancy proportion at 6 cycles of attempt time ranged from 62.0% (age 28-30 years) to 27.6% (age 40-45 years); the cumulative pregnancy proportion at 12 cycles of attempt time ranged from 79.3% (age 25-27 years old) to 55.5% (age 40-45 years old). Similar patterns were observed among male patients, although differences between age groups were smaller. After adjusting for potential confounders, we observed a nearly monotonic decline in fecundability with increasing female age, with the exception of 28-33 years, at which point fecundability was relatively stable. Fecundability ratios were 0.91 (95% confidence interval, 0.74-1.11) for ages 25-27, 0.88 (95% confidence interval, 0.72-1.08) for ages 28-30, 0.87 (95% confidence interval, 0.70-1.08) for ages 31-33, 0.82 (95% confidence interval, 0.64-1.05) for ages 34-36, 0.60 (95% confidence interval, 0.44-0.81) for ages 37-39, and 0.40 (95% confidence interval, 0.22-0.73) for ages 40-45, compared with the reference group (age, 21-24 years). The association was stronger among nulligravid women. Male age was not associated appreciably with fecundability after adjustment for female age, although the number of men >45 years old was small (n=37). CONCLUSION In this preconception cohort study of North American pregnancy planners, increasing female age was associated with an approximately linear decline in fecundability. Although we found little association between male age and fecundability, the small number of men in our study >45 years old limited our ability to draw conclusions on fecundability in older men.
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Affiliation(s)
- Amelia K Wesselink
- Department of Epidemiology, Boston University School of Public Health, Boston, MA.
| | - Kenneth J Rothman
- Department of Epidemiology, Boston University School of Public Health, Boston, MA; RTI Health Solutions, Research Triangle Park, NC
| | - Elizabeth E Hatch
- Department of Epidemiology, Boston University School of Public Health, Boston, MA
| | - Ellen M Mikkelsen
- Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark
| | - Henrik T Sørensen
- Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark
| | - Lauren A Wise
- Department of Epidemiology, Boston University School of Public Health, Boston, MA
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186
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Gaillard JM, Lemaître JF. The Williams' legacy: A critical reappraisal of his nine predictions about the evolution of senescence. Evolution 2017; 71:2768-2785. [DOI: 10.1111/evo.13379] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 09/25/2017] [Accepted: 09/30/2017] [Indexed: 12/16/2022]
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187
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Dehghan Marvast L, Talebi AR, Ghasemzadeh J, Hosseini A, Pacey AA. Effects of Chlamydia trachomatis infection on sperm chromatin condensation and DNA integrity. Andrologia 2017; 50. [PMID: 29110319 DOI: 10.1111/and.12918] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/22/2017] [Indexed: 11/28/2022] Open
Abstract
The present study was performed to investigate the relation of Chlamydia trachomatis infection to sperm chromatin/DNA integrity in a population of infertile men (male partner of infertile couples) from Iran. Blood, semen and first-void urine samples were obtained from 250 infertile men. Data were analysed with regard to the results of (i) serological analysis for specific antibodies to C. trachomatis in serum; (ii) the presence of C. trachomatis and DNA in first-void urine; and (iii) in the semen sample of the male partner, in addition to sperm analysis, four different tests (aniline blue, chromomycin A3, acridine orange and TUNEL) were used to detect sperm chromatin and DNA abnormalities. The main conclusions of the results were: (i) no evidence of C. trachomatis infection in semen samples was found; (ii) sperm DNA fragmentation and chromatin studies were not correlated with C. trachomatis diagnosis; (iii) the percentage of DNA fragmentation is positively correlated with the percentage of immotile sperm but negatively with semen volume, normal morphology; and (iv) in sperm chromatin evaluations, only the percentage of chromatin protamination was related to male age.
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Affiliation(s)
- L Dehghan Marvast
- Department of Human Metabolism, Academic Unit of Reproductive and Developmental Medicine, The University of Sheffield, Sheffield, UK
| | - A R Talebi
- Research and Clinical Centre for Infertility, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - J Ghasemzadeh
- Research and Clinical Centre for Infertility, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - A Hosseini
- Research and Clinical Centre for Infertility, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - A A Pacey
- Department of Human Metabolism, Academic Unit of Reproductive and Developmental Medicine, The University of Sheffield, Sheffield, UK
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188
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Barratt CLR, Björndahl L, De Jonge CJ, Lamb DJ, Osorio Martini F, McLachlan R, Oates RD, van der Poel S, St John B, Sigman M, Sokol R, Tournaye H. The diagnosis of male infertility: an analysis of the evidence to support the development of global WHO guidance-challenges and future research opportunities. Hum Reprod Update 2017; 23:660-680. [PMID: 28981651 PMCID: PMC5850791 DOI: 10.1093/humupd/dmx021] [Citation(s) in RCA: 254] [Impact Index Per Article: 36.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 04/12/2017] [Accepted: 07/12/2017] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Herein, we describe the consensus guideline methodology, summarize the evidence-based recommendations we provided to the World Health Organization (WHO) for their consideration in the development of global guidance and present a narrative review of the diagnosis of male infertility as related to the eight prioritized (problem or population (P), intervention (I), comparison (C) and outcome(s) (O) (PICO)) questions. Additionally, we discuss the challenges and research gaps identified during the synthesis of this evidence. OBJECTIVE AND RATIONALE The aim of this paper is to present an evidence-based approach for the diagnosis of male infertility as related to the eight prioritized PICO questions. SEARCH METHODS Collating the evidence to support providing recommendations involved a collaborative process as developed by WHO, namely: identification of priority questions and critical outcomes; retrieval of up-to-date evidence and existing guidelines; assessment and synthesis of the evidence; and the formulation of draft recommendations to be used for reaching consensus with a wide range of global stakeholders. For each draft recommendation the quality of the supporting evidence was then graded and assessed for consideration during a WHO consensus. OUTCOMES Evidence was synthesized and recommendations were drafted to address the diagnosis of male infertility specifically encompassing the following: What is the prevalence of male infertility and what proportion of infertility is attributable to the male? Is it necessary for all infertile men to undergo a thorough evaluation? What is the clinical (ART/non ART) value of traditional semen parameters? What key male lifestyle factors impact on fertility (focusing on obesity, heat and tobacco smoking)? Do supplementary oral antioxidants or herbal therapies significantly influence fertility outcomes for infertile men? What are the evidence-based criteria for genetic screening of infertile men? How does a history of neoplasia and related treatments in the male impact on (his and his partner's) reproductive health and fertility options? And lastly, what is the impact of varicocele on male fertility and does correction of varicocele improve semen parameters and/or fertility? WIDER IMPLICATIONS This evidence synthesis analysis has been conducted in a manner to be considered for global applicability for the diagnosis of male infertility.
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Affiliation(s)
- Christopher L R Barratt
- Department of Reproductive and Developmental Biology, Medical School, Ninewells Hospital, University of Dundee, Dundee, DD1 9SY, Scotland
| | - Lars Björndahl
- Karolinska University Hospital and Karolinska Institutet, Stockholm, Sweden
| | | | | | | | | | - Robert D Oates
- Boston University School of Medicine and Boston Medical Center, Boston, MA, USA
| | - Sheryl van der Poel
- Department of Reproductive Health and Research, Human Reproduction Programme, (HRP, The UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction), WHO, Geneva, Switzerland
- Population Council, New York, NY, USA
| | - Bianca St John
- Hudson Institute of Medical Research, Clayton, Australia
| | - Mark Sigman
- Warren Alpert Medical School of Brown University, RI, USA
| | - Rebecca Sokol
- Department of Obstetrics and Gynaecology and Medicine, Keck School of Medicine, University of Southern California, CA, USA
| | - Herman Tournaye
- Centre for Reproductive Medicine, Vrije Universiteit Brussel, Brussels, Belgium
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189
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Arab A, Rafie N, Mansourian M, Miraghajani M, Hajianfar H. Dietary patterns and semen quality: a systematic review and meta-analysis of observational studies. Andrology 2017; 6:20-28. [PMID: 29024507 DOI: 10.1111/andr.12430] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 08/29/2017] [Accepted: 09/03/2017] [Indexed: 11/29/2022]
Abstract
A number of studies have examined the association between dietary patterns and semen quality, but the findings have been inconclusive. Herein, we conducted a systematic review and meta-analysis of observational studies to assess the association between dietary patterns and semen quality. PubMed, Cochrane library, Science direct, Scopus, Google Scholar, and ISI web of science databases were searched up to August 2016 for observational studies assessing the association between common dietary patterns and sperm quality markers. Data were pooled by the generic inverse variance method with random effects and expressed as mean differences with 95% confidence intervals (CIs). Heterogeneity was assessed (Cochrane Q-statistic) and quantified (I2 -statistic). The Newcastle-Ottawa Scale assessed study quality. Six eligible studies, involving 8207 participants, were included in our systematic review and meta-analysis. The pooled mean difference of sperm concentration for the healthy dietary pattern versus unhealthy dietary pattern intake was mean difference: 0.66; 95% CI, 0.305-1.016; p < 0.001. In comparison with those who had the highest adherence to healthy dietary pattern, individuals in the lowest adherence had significantly lower level of sperm concentration. However, no significant association was seen between eating patterns and other semen quality. Healthy dietary pattern seems to be associated with elevated sperm concentration level. Further longitudinal studies are needed to clarify this relationship.
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Affiliation(s)
- A Arab
- Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.,Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
| | - N Rafie
- Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.,Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
| | - M Mansourian
- Department of Biostatistics and Epidemiology, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
| | - M Miraghajani
- National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - H Hajianfar
- Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.,Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
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190
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Levine H, Keinan-Boker L, Leiba A, Derazne E, Rais A, Kark JD. Paternal age and risk of testicular germ cell tumors: a cohort study of 1,000,000 men. Andrology 2017; 5:1124-1130. [PMID: 28950439 DOI: 10.1111/andr.12422] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 07/28/2017] [Accepted: 08/01/2017] [Indexed: 01/12/2023]
Abstract
Testicular germ cell tumors (TGCT) are the most frequent cancer among young men, with increasing incidence worldwide. Advanced paternal age has been linked to adverse health outcomes in offspring, but reports on the association of paternal age with TGCT are few and inconsistent. We aimed to examine the relationship of paternal age (PAB) at birth with the risk of TGCT and by histologic type: seminoma and non-seminoma. A population-based cohort of 1,056,058 males, examined at ages 16-19 between the years 1980-2011, was linked to the Israel National Cancer Registry to obtain incident TGCT through 2012. We applied multivariable Cox regression. During 16.5 million person-years of follow-up, 1247 incident cases (604 seminomas and 643 non-seminomas) were detected. Increasing PAB was linearly associated with lower risk of TGCT (HRper year = 0.983, 95% CI: 0.974-0.993, p = 0.001), after adjustment for year of birth, years of education, height, cryptorchidism history and origin, and also with additional adjustment for maternal age at birth (MAB) (HRper year = 0.980: 0.965-0.995, p = 0.008). The association was stronger for seminoma (HRper year = 0.968: 0.946-0.989, p = 0.004) and persisted in a subset adjusted for sibship size (HRper year = 0.950: 0.917-0.983, p = 0.003). In the fully adjusted model, young PAB (15-24 vs. ≥30) was a risk factor for seminoma (HR = 1.41: 1.07-1.85, p = 0.014). In models adjusted for PAB, MAB was not associated with risk of TGCT. In conclusion, our findings suggest that young paternal age is a risk factor of TGCT, especially seminoma. The findings warrant further investigation into the possible impact of young paternal age on their offsprings' testes.
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Affiliation(s)
- H Levine
- Braun School of Public Health and Community Medicine, Hebrew University-Hadassah, Jerusalem, Israel
| | - L Keinan-Boker
- The National Cancer Registry, Israel Center for Disease Control, Jerusalem, Israel.,School of Public Health, University of Haifa, Haifa, Israel
| | - A Leiba
- The Israel Defense Forces Medical Corps, Tel Hashomer, Israel.,Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel.,Institute of Nephrology and Hypertension, Sheba Medical Center, Tel Hashomer, Israel
| | - E Derazne
- The Israel Defense Forces Medical Corps, Tel Hashomer, Israel.,Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
| | - A Rais
- The Israel Defense Forces Medical Corps, Tel Hashomer, Israel
| | - J D Kark
- Braun School of Public Health and Community Medicine, Hebrew University-Hadassah, Jerusalem, Israel
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191
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Affiliation(s)
- Monica Muratori
- Sexual Medicine and Andrology Unit, Department of Experimental, Clinical and Biomedical Sciences, University of Florence, Florence, Italy
| | - Elisabetta Baldi
- Sexual Medicine and Andrology Unit, Department of Experimental, Clinical and Biomedical Sciences, University of Florence, Florence, Italy
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192
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Khandwala YS, Zhang CA, Lu Y, Eisenberg ML. The age of fathers in the USA is rising: an analysis of 168 867 480 births from 1972 to 2015. Hum Reprod 2017; 32:2110-2116. [DOI: 10.1093/humrep/dex267] [Citation(s) in RCA: 126] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 08/07/2017] [Indexed: 01/16/2023] Open
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193
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Li D, Meng L, Xu T, Su Y, Liu X, Zhang Z, Wang X. RIPK1-RIPK3-MLKL-dependent necrosis promotes the aging of mouse male reproductive system. eLife 2017; 6. [PMID: 28807105 PMCID: PMC5557593 DOI: 10.7554/elife.27692] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 07/23/2017] [Indexed: 12/12/2022] Open
Abstract
A pair of kinases, RIPK1 and RIPK3, as well as the RIPK3 substrate MLKL cause a form of programmed necrotic cell death in mammals termed necroptosis. We report here that male reproductive organs of both Ripk3- and Mlkl-knockout mice retain ‘youthful’ morphology and function into advanced age, while those of age-matched wild-type mice deteriorate. The RIPK3 phosphorylation of MLKL, the activation marker of necroptosis, is detected in spermatogonial stem cells in the testes of old but not in young wild-type mice. When the testes of young wild-type mice are given a local necroptotic stimulus, their reproductive organs showed accelerated aging. Feeding of wild-type mice with an RIPK1 inhibitor prior to the normal onset of age-related changes in their reproductive organs blocked the appearance of signs of aging. Thus, necroptosis in testes promotes the aging-associated deterioration of the male reproductive system in mice. DOI:http://dx.doi.org/10.7554/eLife.27692.001
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Affiliation(s)
- Dianrong Li
- National Institute of Biological Sciences, Beijing, China
| | - Lingjun Meng
- National Institute of Biological Sciences, Beijing, China
| | - Tao Xu
- National Institute of Biological Sciences, Beijing, China
| | - Yaning Su
- National Institute of Biological Sciences, Beijing, China
| | - Xiao Liu
- National Institute of Biological Sciences, Beijing, China
| | - Zhiyuan Zhang
- National Institute of Biological Sciences, Beijing, China
| | - Xiaodong Wang
- National Institute of Biological Sciences, Beijing, China
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194
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Khandwala YS, Zhang CA, Li S, Behr B, Guo D, Eisenberg ML. Racial Variation in Semen Quality at Fertility Evaluation. Urology 2017; 106:96-102. [DOI: 10.1016/j.urology.2017.03.064] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 02/23/2017] [Accepted: 03/15/2017] [Indexed: 10/19/2022]
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195
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Tournaye H, Krausz C, Oates RD. Novel concepts in the aetiology of male reproductive impairment. Lancet Diabetes Endocrinol 2017; 5:544-553. [PMID: 27395771 DOI: 10.1016/s2213-8587(16)30040-7] [Citation(s) in RCA: 156] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 02/09/2016] [Accepted: 04/04/2016] [Indexed: 12/11/2022]
Abstract
Infertility is a widespread problem and a male contribution is involved in 20-70% of affected couples. As a man's fertility relies on the quantity and quality of his sperm, semen analysis is generally used as the proxy to estimate fertility or gain insight into the underlying reasons for infertility. Male reproductive impairment might result from factors that affect sperm production, quality, function, or transport. Although in most men the origin of infertility remains unexplained, genetic causes are increasingly being discovered. In this first of two papers in The Lancet Diabetes and Endocrinology Series on male reproductive impairment, we propose a novel, clinically based aetiological construct with a genetic focus, and consider how this might serve as a helpful way to conceptualise a diagnostic algorithm.
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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
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196
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Eisenberg ML, Meldrum D. Effects of age on fertility and sexual function. Fertil Steril 2017; 107:301-304. [PMID: 28160919 DOI: 10.1016/j.fertnstert.2016.12.018] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 12/16/2016] [Accepted: 12/16/2016] [Indexed: 12/14/2022]
Abstract
As paternal age increases in the developed world, more attention has been given to the effects of age on male reproductive and sexual function. Although the biologic potential for reproductive continues for most of a man's life, changes in sperm production do occur. In addition, erectile function changes with age, caused by the same factors that lead to other vascular disease.
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Affiliation(s)
- Michael L Eisenberg
- Department of Urology, Stanford University School of Medicine, Stanford, California.
| | - David Meldrum
- Department of Reproductive Medicine, Division of Reproductive Endocrinology and Infertility, University of California, San Diego, California
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197
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Harper J, Boivin J, O’Neill HC, Brian K, Dhingra J, Dugdale G, Edwards G, Emmerson L, Grace B, Hadley A, Hamzic L, Heathcote J, Hepburn J, Hoggart L, Kisby F, Mann S, Norcross S, Regan L, Seenan S, Stephenson J, Walker H, Balen A. The need to improve fertility awareness. REPRODUCTIVE BIOMEDICINE & SOCIETY ONLINE 2017; 4:18-20. [PMID: 29774262 PMCID: PMC5952813 DOI: 10.1016/j.rbms.2017.03.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 03/27/2017] [Indexed: 05/05/2023]
Abstract
Women and men globally are delaying the birth of their first child. In the UK, the average age of first conception in women is 29 years. Women experience age-related fertility decline so it is important that men and women are well-informed about this, and other aspects of fertility. A group of UK stakeholders have established the Fertility Education Initiative to develop tools and information for children, adults, teachers, parents and healthcare professionals dedicated to improving knowledge of fertility and reproductive health.
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Affiliation(s)
- Joyce Harper
- Embryology, IVF and Reproductive Genetics Group, Institute for Women’s Health, University College London, UK
| | | | - Helen C. O’Neill
- Embryology, IVF and Reproductive Genetics Group, Institute for Women’s Health, University College London, UK
| | | | | | | | - Genevieve Edwards
- Marie Stopes International, 1 Conway Street, Fitzroy Square, London, W1T 6LP, UK
| | | | - Bola Grace
- Embryology, IVF and Reproductive Genetics Group, Institute for Women’s Health, University College London, UK
| | - Alison Hadley
- Teenage Pregnancy Knowledge Exchange, University of Bedfordshire
| | | | | | | | - Lesley Hoggart
- School of Health, Wellbeing and Social Care, Faculty of Wellbeing, Education and Language Studies, The Open University
| | - Fiona Kisby
- Institute of Education, University College London
| | | | | | - Lesley Regan
- Royal College of Obstetricians and Gynaecologists (RCOG)
| | | | - Judith Stephenson
- Embryology, IVF and Reproductive Genetics Group, Institute for Women’s Health, University College London, UK
| | - Harry Walker
- Faculty of Sexual and Reproductive Healthcare (FSRH), UK
| | - Adam Balen
- Leeds Centre for Reproductive Medicine, Seacroft Hospital, York Road, Leeds, UK
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198
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Lemaître JF, Gaillard JM. Reproductive senescence: new perspectives in the wild. Biol Rev Camb Philos Soc 2017; 92:2182-2199. [PMID: 28374548 DOI: 10.1111/brv.12328] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 02/23/2017] [Accepted: 03/03/2017] [Indexed: 11/26/2022]
Abstract
According to recent empirical studies, reproductive senescence, the decline in reproductive success with increasing age, seems to be nearly ubiquitous in the wild. However, a clear understanding of the evolutionary causes and consequences of reproductive senescence is still lacking and requires new and integrative approaches. After identifying the sequential and complex nature of female reproductive senescence, we show that the relative contributions of physiological decline and alterations in the efficiency of parental care to reproductive senescence remain unknown and need to be assessed in the light of current evolutionary theories of ageing. We demonstrate that, although reproductive senescence is generally studied only from the female viewpoint, age-specific female reproductive success strongly depends on male-female interactions. Thus, a reduction in male fertilization efficiency with increasing age has detrimental consequences for female fitness. Lastly, we call for investigations of the role of environmental conditions on reproductive senescence, which could provide salient insights into the underlying sex-specific mechanisms of reproductive success. We suggest that embracing such directions should allow building new bridges between reproductive senescence and the study of sperm competition, parental care, mate choice and environmental conditions.
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Affiliation(s)
- Jean-François Lemaître
- Univ Lyon, Université Lyon 1; CNRS, Laboratoire de Biométrie et Biologie Évolutive UMR5558, F-69622, Villeurbanne, France
| | - Jean-Michel Gaillard
- Univ Lyon, Université Lyon 1; CNRS, Laboratoire de Biométrie et Biologie Évolutive UMR5558, F-69622, Villeurbanne, France
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199
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Hsu YH, Simons MJP, Schroeder J, Girndt A, Winney IS, Burke T, Nakagawa S. Age-dependent trajectories differ between within-pair and extra-pair paternity success. J Evol Biol 2017; 30:951-959. [DOI: 10.1111/jeb.13058] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 02/15/2017] [Accepted: 02/20/2017] [Indexed: 02/02/2023]
Affiliation(s)
- Y.-H. Hsu
- Department of Zoology; University of Otago; Dunedin New Zealand
- Department of Life Science; National Taiwan Normal University; Taipei Taiwan
| | - M. J. P. Simons
- Department of Animal and Plant Sciences; University of Sheffield; Sheffield UK
| | - J. Schroeder
- Evolutionary Biology; Max Planck Institute for Ornithology; Seewiesen Germany
- Department of Life Sciences; Imperial College London; Ascot Berkshire UK
| | - A. Girndt
- Evolutionary Biology; Max Planck Institute for Ornithology; Seewiesen Germany
- Department of Life Sciences; Imperial College London; Ascot Berkshire UK
| | - I. S. Winney
- Department of Animal and Plant Sciences; University of Sheffield; Sheffield UK
- Evolutionary Biology; Max Planck Institute for Ornithology; Seewiesen Germany
| | - T. Burke
- Department of Animal and Plant Sciences; University of Sheffield; Sheffield UK
| | - S. Nakagawa
- Department of Zoology; University of Otago; Dunedin New Zealand
- Department of Animal and Plant Sciences; University of Sheffield; Sheffield UK
- Evolution & Ecology Research Centre and School of Biological, Earth and Environmental Sciences; University of New South Wales; Sydney NSW Australia
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200
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Effects of different kinds of essentiality on sequence evolution of human testis proteins. Sci Rep 2017; 7:43534. [PMID: 28272493 PMCID: PMC5341092 DOI: 10.1038/srep43534] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 01/25/2017] [Indexed: 11/17/2022] Open
Abstract
We asked if essentiality for either fertility or viability differentially affects sequence evolution of human testis proteins. Based on murine knockout data, we classified a set of 965 proteins expressed in human seminiferous tubules into three categories: proteins essential for prepubertal survival (“lethality proteins”), associated with male sub- or infertility (“male sub-/infertility proteins”), and nonessential proteins. In our testis protein dataset, lethality genes evolved significantly slower than nonessential and male sub-/infertility genes, which is in line with other authors’ findings. Using tissue specificity, connectivity in the protein-protein interaction (PPI) network, and multifunctionality as proxies for evolutionary constraints, we found that of the three categories, proteins linked to male sub- or infertility are least constrained. Lethality proteins, on the other hand, are characterized by broad expression, many PPI partners, and high multifunctionality, all of which points to strong evolutionary constraints. We conclude that compared with lethality proteins, those linked to male sub- or infertility are nonetheless indispensable, but evolve under more relaxed constraints. Finally, adaptive evolution in response to postmating sexual selection could further accelerate evolutionary rates of male sub- or infertility proteins expressed in human testis. These findings may become useful for in silico detection of human sub-/infertility genes.
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