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Karimian M, Parvaresh L, Behjati M. Genetic variations as molecular diagnostic factors for idiopathic male infertility: current knowledge and future perspectives. Expert Rev Mol Diagn 2021; 21:1191-1210. [PMID: 34555965 DOI: 10.1080/14737159.2021.1985469] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
INTRODUCTION Infertility is a major health problem, worldwide, which affects 10-15% of couples. About half a percent of infertility cases are related to male-related factors. Male infertility is a complex disease that is the result of various insults as lifestyle issues, genetics, and epigenetic factors. Idiopathic infertility is responsible for 30% of total cases. The genetic factors responsible for male infertility include chromosomal abnormalities, deletions of chromosome Y, and mutations and genetic variations of key genes. AREAS COVERED In this review article, we aim to narrate performed studies on polymorphisms of essential genes involved in male infertility including folate metabolizing genes, oxidative stress-related genes, inflammation, and cellular pathways related to spermatogenesis. Moreover, possible pathophysiologic mechanisms responsible for genetic polymorphisms are discussed. EXPERT OPINION Analysis and assessment of these genetic variations could help in screening, diagnosis, and treatment of idiopathic male infertility.
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Affiliation(s)
- Mohammad Karimian
- Department of Molecular and Cell Biology, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Iran
| | - Leila Parvaresh
- Department of Anatomy, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohaddeseh Behjati
- Cellular, Molecular and Genetics Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
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2
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Hekim N, Gure MA, Metin Mahmutoglu A, Gunes S, Asci R, Henkel R. SNP's in xenobiotic metabolism and male infertility. Xenobiotica 2019; 50:363-370. [PMID: 31070506 DOI: 10.1080/00498254.2019.1616850] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
1. Glutathione S-transferases (GST) and cytochrome P450s (CYPs) are xenobiotic metabolizing enzymes participating in the protection of cell. The present study aimed to investigate the relationship between polymorphisms of glutathione S-transferase M1 (GSTM1) null, glutathione S-transferase T1 (GSTT1) null, glutathione S-transferase P1 (GSTP1) Ile105Val, cytochrome P450 1A2 (CYP1A2) 734 C→A, cytochrome P450 2D6 (CYP2D6) 1934 G→A and male infertility.2. A total of 306 azoospermic or oligozoospermic infertile men and 129 normozoospermic or fertile controls were enrolled in the study. Multiplex polymerase chain reaction (PCR) or PCR-restriction fragment length polymorphism methods were used for genotyping. There was a significant relationship between male infertility and CYP2D6 GG genotype (p < 0.001). CYP1A2 AA genotype was slightly higher in the infertile group (p = 0.056).3. There was no association between GSTT1 null polymorphisms and male infertility (p = 0.068), GSTM1 null (p = 0.843) and GSTP1 Ile105Val (p = 0.192) genes. GSTM1 null genotype frequency was higher in azoospermic men (p = 0.009). Men carrying CYP1A2 AA genotype had higher risk of infertility risk (OR = 3.14; %95 CI = 1.16-8.54) in the smoker group.4. Our results demonstrated that polymorphisms of CYP2D6 and CYP1A2 may play a role in idiopathic male infertility in our sample population.
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Affiliation(s)
- Neslihan Hekim
- Medical Faculty, Department of Medical Biology, Ondokuz Mayis University, Samsun, Turkey
| | - Mohamed Ali Gure
- Medical Faculty, Department of Medical Biology, Ondokuz Mayis University, Samsun, Turkey
| | - Asli Metin Mahmutoglu
- Medical Faculty, Department of Medical Biology, Ondokuz Mayis University, Samsun, Turkey
| | - Sezgin Gunes
- Medical Faculty, Department of Medical Biology, Ondokuz Mayis University, Samsun, Turkey.,Department of Multidisciplinary Molecular Medicine, Ondokuz Mayis University, Samsun, Turkey
| | - Ramazan Asci
- Department of Multidisciplinary Molecular Medicine, Ondokuz Mayis University, Samsun, Turkey.,Medical Faculty, Department of Urology, Ondokuz Mayis University, Samsun, Turkey
| | - Ralf Henkel
- Department of Medical Bioscience, University of the Western Cape, Bellville, South Africa
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3
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Hu CY, Lu DL, Wu T, Cheng SL, Wu TT, Wang S, Zhang T. Glutathione-S-transferases M1/T1 gene polymorphisms and male infertility risk in Chinese populations: A meta-analysis. Medicine (Baltimore) 2019; 98:e14166. [PMID: 30732132 PMCID: PMC6380701 DOI: 10.1097/md.0000000000014166] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND A meta-analysis was applied to evaluate the associations between the glutathione-S-transferases (GSTs) M1/T1 gene polymorphisms and male infertility in Chinese populations. METHODS A comprehensive search for articles was conducted from PubMed, Web of Science, Embase, China biology medical literature database (CBM), China National Knowledge Infrastructure (CNKI), VIP, and Chinese literature database(Wang fang) up to April 30, 2018. All of the statistical analyses were performed using Review Manager 5.3 and Stata 14.0. RESULTS Ten studies on GSTM1 gene polymorphism involving 3302 cases and 1959 controls, and ten studies on GSTT1 gene polymorphism involving 3048 cases and 1861 controls were included in this meta-analysis. Overall, the null genotype of GSTM1/GSTT1 was significantly related to male infertility risk in Chinese populations (GSTM1, OR = 1.35, 95% CI: 1.02-1.78; GSTT1, OR = 1.40, 95% CI: 1.15-1.70). In subgroup analyses stratified by infertility type, significant association was observed between GSTT1 null genotype and male infertility in both nonobstructive azoospermia (NOA) and oligoasthenozoospermia (OAT). However, the GSTM1 null genotype was associated with OAT, but not NOA in Chinese populations. The sensitivity analysis confirmed the reliability and stability of the meta-analysis. CONCLUSION Our meta-analysis supports that the GSTM1/GSTT1 null genotype might contribute to individual susceptibility to male infertility in Chinese populations.
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Affiliation(s)
- Chun-Yan Hu
- Department of Urology, Affiliated Hospital of North Sichuan Medical College, Nanchong
| | - Dong-Liang Lu
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Tao Wu
- Department of Urology, Affiliated Hospital of North Sichuan Medical College, Nanchong
| | - Shu-Lin Cheng
- Department of Urology, Affiliated Hospital of North Sichuan Medical College, Nanchong
| | - Tian-tian Wu
- Department of Urology, Affiliated Hospital of North Sichuan Medical College, Nanchong
| | - Shu Wang
- Department of Urology, Affiliated Hospital of North Sichuan Medical College, Nanchong
| | - Tao Zhang
- Department of Urology, Affiliated Hospital of North Sichuan Medical College, Nanchong
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4
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Sinha A, Singh V, Singh S, Yadav S. Proteomic analyses reveal lower expression of TEX40 and ATP6V0A2 proteins related to calcium ion entry and acrosomal acidification in asthenozoospermic males. Life Sci 2019; 218:81-88. [PMID: 30550884 DOI: 10.1016/j.lfs.2018.12.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 12/07/2018] [Accepted: 12/10/2018] [Indexed: 02/07/2023]
Abstract
AIMS Idiopathic nature of male infertility disorder needs to be investigated by different horizons of molecular biology for its treatment and to device male contraceptive. Further, it can also aid in advancement of assisted reproductive technology (ART), as nowadays the failure and disquiets of ART are consistent. Herein, we have attempted to find out proteins responsible for male infertility by comparing proteome profile of sperms collected from normal control and asthenozoospermic (AS) males. MAIN METHODS Differential proteome profiles were studied by 2-dimensional differential gel electrophoresis (2D-DIGE) and mass spectrometry. The confirmation of proteome profiling results was done by western blotting and ELISA. Quantitative reverse-transcription-PCR was also performed in an independent cohort of AS and normal individuals to investigate the transcriptional regulation of proteins. KEY FINDINGS Although seven differentially regulated proteins were identified, highpoints of the study were two proteins, TEX40 and ATP6V0A2. Lower expression of a crucial sperm motility related protein, TEX40 is reported for the first time in clinically diagnosed AS males in the present investigation. Most likely with reference to previous findings the down regulation of TEX40 leads to fewer entries of calcium ions in the sperm and lower expression of ATP6V0A2 is responsible for acrosomal de-acidification. SIGNIFICANCE Conclusively, the down regulation of these two proteins in AS males might result in diminished sperm motility. The findings can be worthwhile for male contraception and ART management besides their use for male infertility therapy.
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Affiliation(s)
- Ashima Sinha
- Department of Biophysics, All India Institute of Medical Sciences, New Delhi 110029, India; Department of Biochemistry, Sir Ganga Ram Hospital, New Delhi 110060, India
| | - Virendra Singh
- School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Sarman Singh
- Department of Laboratory Medicine, Division of Clinical Microbiology & Molecular Medicine, All India Institute of Medical Sciences, New Delhi 110029, India; All India Institute of Medical Sciences, Bhopal, Madhya Pradesh 462020, India
| | - Savita Yadav
- Department of Biophysics, All India Institute of Medical Sciences, New Delhi 110029, India.
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Ricci E, Al-Beitawi S, Cipriani S, Alteri A, Chiaffarino F, Candiani M, Gerli S, Viganó P, Parazzini F. Dietary habits and semen parameters: a systematic narrative review. Andrology 2017; 6:104-116. [PMID: 29266782 DOI: 10.1111/andr.12452] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 10/03/2017] [Accepted: 11/07/2017] [Indexed: 01/10/2023]
Abstract
Semen quality and male fertility are declining worldwide. As it was observed that physiologic and pathologic processes of spermatogenesis can be influenced by diet, the relation between dietary habits and semen parameters has been the focus of much interest. To review the human observational studies on this issue, we performed a systematic literature search, up to November 2016 (MEDLINE and EMBASE). We included all observational full-text papers reporting the relation between dietary habits and semen parameters. Article selection was carried out in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses. Twenty-three observational studies were included. Overall, 8477 healthy men and 1204 men presenting at Fertility Clinics were included in the selected studies. Even if some inconsistencies are present, possibly due to the different effect of nutrients in fertile and infertile men, results support the hypothesis that diets including fruit and vegetables, for their contents in vitamins, and fish or low-fat dairy products as the main source of proteins, are associated with better semen quality. Recommendations may be confidently provided because of the many beneficial effects of a healthy diet, although further studies are needed to clarify the currently inconsistent findings and to shed light on the underlying mechanisms.
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Affiliation(s)
- E Ricci
- Dipartimento della donna, del bambino e del neonato, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - S Al-Beitawi
- Reproductive Sciences Laboratory, Division of Genetics and Cell Biology, IRCCS Ospedale San Raffaele, Milan, Italy
| | - S Cipriani
- Dipartimento della donna, del bambino e del neonato, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - A Alteri
- Reproductive Sciences Laboratory, Division of Genetics and Cell Biology, IRCCS Ospedale San Raffaele, Milan, Italy
| | - F Chiaffarino
- Dipartimento della donna, del bambino e del neonato, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - M Candiani
- Obstetrics and Gynecology Unit, San Raffaele Scientific Institute and Vita-Salute University, Milano, Italy
| | - S Gerli
- Department of Obstetrics and Gynecology, University of Perugia, Perugia, Italy
| | - P Viganó
- Reproductive Sciences Laboratory, Division of Genetics and Cell Biology, IRCCS Ospedale San Raffaele, Milan, Italy
| | - F Parazzini
- Dipartimento della donna, del bambino e del neonato, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy.,Dipartimento di Scienze Cliniche e di Comunità, Università di Milano, Milano, Italy
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6
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Wu Q, Zhang J, Zhu P, Jiang W, Liu S, Ni M, Zhang M, Li W, Zhou Q, Cui Y, Xia X. The susceptibility of FSHB -211G > T and FSHR G-29A, 919A > G, 2039A > G polymorphisms to men infertility: an association study and meta-analysis. BMC MEDICAL GENETICS 2017; 18:81. [PMID: 28764642 PMCID: PMC5540502 DOI: 10.1186/s12881-017-0441-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 07/13/2017] [Indexed: 11/10/2022]
Abstract
BACKGROUND Male infertility is a complex disorder caused by genetic, developmental, endocrine, or environmental factors as well as unknown etiology. Polymorphisms in the follicle stimulating hormone beta subunit (FSHB) (rs10835638, c.-211G > T) and follicle stimulating hormone receptor (FSHR) (rs1394205, c.-29G > A; rs6165, c.919A > G; rs6166, c.2039 A > G) genes might disturb normal spermatogenesis and affect male reproductive ability. METHODS To further ascertain the aforementioned effects, we conducted a case-control study of 255 infertile men and 340 fertile controls from South China using the Mass ARRAY method, which was analyzed by the t-tests and logistic regression analysis using SPSS for Windows 14.0. In addition, a meta-analysis was performed by combining our results with previous reports using STATA 12.0. RESULTS In the FSHB or FSHR gene single nucleotide polymorphism (SNP) evaluation, no statistically-significant difference was found in the frequency of allelic variants or in genotype distribution between cases and controls. However, a significant association for the comparison of GAA (P: 0.022, OR: 0.63, 95%CI: 0.43-0.94) was seen between the oligozoospermia and controls in haplotype analysis of rs1394205/rs6165/rs6166. In the meta-analysis, rs6165G allele and rs6166 GG genotype were associated with increased risk of the male infertility. CONCLUSIONS This study suggested that FSHR GAA haplotype would exert protective effects against male sterility, which indicated that the combination of three SNP genotypes of FSHR was predicted to have a much stronger impact than either one alone. Then in the meta-analysis, a significant association was seen between FSHR rs6165, rs6166 polymorphisms and male infertility. In terms of male infertility with multifactorial etiology, further studies with larger sample sizes and different ethnic backgrounds or other risk factors are warranted to clarify the potential role of FSHB and FSHR polymorphisms in the pathogenesis of male infertility.
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Affiliation(s)
- Qiuyue Wu
- Institute of Laboratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, People's Republic of China
| | - Jing Zhang
- Institute of Laboratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, People's Republic of China
| | - Peiran Zhu
- Institute of Laboratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, People's Republic of China
| | - Weijun Jiang
- Institute of Laboratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, People's Republic of China
| | - Shuaimei Liu
- Institute of Laboratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, People's Republic of China
| | - Mengxia Ni
- Institute of Laboratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, People's Republic of China
| | - Mingchao Zhang
- Institute of Laboratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, People's Republic of China
| | - Weiwei Li
- Institute of Laboratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, People's Republic of China
| | - Qing Zhou
- Institute of Laboratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, People's Republic of China
| | - Yingxia Cui
- Institute of Laboratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, People's Republic of China
| | - Xinyi Xia
- Institute of Laboratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, 210002, People's Republic of China.
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7
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Saraswat M, Joenväärä S, Jain T, Tomar AK, Sinha A, Singh S, Yadav S, Renkonen R. Human Spermatozoa Quantitative Proteomic Signature Classifies Normo- and Asthenozoospermia. Mol Cell Proteomics 2017; 16:57-72. [PMID: 27895139 PMCID: PMC5217782 DOI: 10.1074/mcp.m116.061028] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 10/17/2016] [Indexed: 02/05/2023] Open
Abstract
Scarcely understood defects lead to asthenozoospermia, which results in poor fertility outcomes. Incomplete knowledge of these defects hinders the development of new therapies and reliance on interventional therapies, such as in vitro fertilization, increases. Sperm cells, being transcriptionally and translationally silent, necessitate the proteomic approach to study the sperm function. We have performed a differential proteomics analysis of human sperm and seminal plasma and identified and quantified 667 proteins in sperm and 429 proteins in seminal plasma data set, which were used for further analysis. Statistical and mathematical analysis combined with pathway analysis and self-organizing maps clustering and correlation was performed on the data set.It was found that sperm proteomic signature combined with statistical analysis as opposed to the seminal plasma proteomic signature can differentiate the normozoospermic versus the asthenozoospermic sperm samples. This is despite the results that some of the seminal plasma proteins have big fold changes among classes but they fall short of statistical significance. S-Plot of the sperm proteomic data set generated some high confidence targets, which might be implicated in sperm motility pathways. These proteins also had the area under the curve value of 0.9 or 1 in ROC curve analysis.Various pathways were either enriched in these proteomic data sets by pathway analysis or they were searched by their constituent proteins. Some of these pathways were axoneme activation and focal adhesion assembly, glycolysis, gluconeogenesis, cellular response to stress and nucleosome assembly among others. The mass spectrometric data is available via ProteomeXchange with identifier PXD004098.
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Affiliation(s)
- Mayank Saraswat
- From the ‡Transplantation laboratory, Haartmaninkatu 3, PO Box 21, FI-00014 University of Helsinki, Finland
- §HUSLAB, Helsinki University Hospital, Helsinki, Finland
| | | | - Tushar Jain
- ¶School of Computing and Electrical Engineering, Indian Institute of Technology Mandi, Kamand-175005, Himachal Pradesh, India
| | - Anil Kumar Tomar
- ‖Department of Biophysics, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Ashima Sinha
- ‖Department of Biophysics, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Sarman Singh
- **Division of Clinical Microbiology & Molecular Medicine, Department of Laboratory Medicine, All India Institute of Medical Sciences, New Delhi-110029, India
| | - Savita Yadav
- ‖Department of Biophysics, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Risto Renkonen
- From the ‡Transplantation laboratory, Haartmaninkatu 3, PO Box 21, FI-00014 University of Helsinki, Finland;
- §HUSLAB, Helsinki University Hospital, Helsinki, Finland
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8
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Xiong DK, Chen HH, Ding XP, Zhang SH, Zhang JH. Association of polymorphisms in glutathione S-transferase genes (GSTM1, GSTT1, GSTP1) with idiopathic azoospermia or oligospermia in Sichuan, China. Asian J Androl 2016; 17:481-6. [PMID: 25532576 PMCID: PMC4430955 DOI: 10.4103/1008-682x.143737] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The reported effects of the glutathione S-transferase (GSTs) genes (GSTM1, GSTT1, and GSTP1) on male factor infertility have been inconsistent and even contradictory. Here, we conducted a case-control study to investigate the association between functionally important polymorphisms in GST genes and idiopathic male infertility. The study group consisted of 361 men with idiopathic azoospermia, 118 men with idiopathic oligospermia, and 234 age-matched healthy fertile male controls. Genomic DNA was extracted from the peripheral blood, and analyzed by polymerase chain reaction and restriction fragment length polymorphism analysis. There was a significant association between the GSTP1 variant genotype (Ile/Val + Val/Val) with idiopathic infertility risk (odds ratio [OR]: 1.53; 95% confidence interval [CI]: 1.11–2.11; P = 0.009). Similarly, a higher risk of infertility was noted in individuals carrying a genotype combination of GSTT1-null and GSTP1 (Ile/Val + Val/Val) (OR: 2.17; 95% CI: 1.43–3.31; P = 0.0002). These results suggest an increased risk of the GSTP1 variant genotype (Ile/Val + Val/Val) for developing male factor infertility. Our findings also underrate the significance of the effect of GSTM1 and/or GSTT1 (especially the former) in modulating the risk of male infertility in males from Sichuan, southwest China.
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Affiliation(s)
| | | | - Xian-Ping Ding
- Key Laboratory of Bio Resources and Eco-Environment, Ministry of Education, School of Life Science, Institute of Medical Genetics, Sichuan University; Bio-resource Research and Utilization Joint Key Laboratory of Sichuan and Chongqing, Chengdu; Biotechnology Academy of Nanchuan, Chongqing, China
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9
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Giahi L, Mohammadmoradi S, Javidan A, Sadeghi MR. Nutritional modifications in male infertility: a systematic review covering 2 decades. Nutr Rev 2016; 74:118-30. [PMID: 26705308 PMCID: PMC4892303 DOI: 10.1093/nutrit/nuv059] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 07/09/2015] [Accepted: 08/01/2015] [Indexed: 11/13/2022] Open
Abstract
CONTEXT Studies suggest that appropriate nutritional modifications can improve the natural conception rate of infertile couples. OBJECTIVES The purpose of this study was to review the human trials that investigated the relation between nutrition and male infertility. DATA SOURCES A comprehensive systematic review of published human studies was carried out by searching scientific databases. Article selection was carried out in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses. The American Dietetic Association Research Design and Implementation Checklist was also used for quality assessment. DATA EXTRACTION A total of 502 articles were identified, of which 23 studies met the inclusion criteria. DATA SYNTHESIS Results indicated that a healthy diet improves at least one measure of semen quality, while diets high in lipophilic foods, soy isoflavones, and sweets lower semen quality. CONCLUSION The role of daily nutrient exposure and dietary quality needs to be highlighted in male infertility. Mechanistic studies addressing the responsible underlying mechanisms of action of dietary modifications are highly warranted. SYSTEMATIC REVIEW REGISTRATION PROSPERO 2013: CRD42013005953. Available at: http://www.crd.york.ac.uk/PROSPERO/display_record.asp?ID=CRD42013005953.
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Affiliation(s)
- Ladan Giahi
- L. Giahi is with the Reproductive Biotechnology Research Center, Avicenna Research Institute, Academic Center for Education, Culture and Research, Tehran, Iran. S. Mohammadmoradi and A. Javidan are with the Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA. M.R. Sadeghi is with the Monoclonal Antibody Research Center, Avicenna Research Institute, Academic Center for Education, Culture and Research, Tehran, Iran.
| | - Shayan Mohammadmoradi
- L. Giahi is with the Reproductive Biotechnology Research Center, Avicenna Research Institute, Academic Center for Education, Culture and Research, Tehran, Iran. S. Mohammadmoradi and A. Javidan are with the Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA. M.R. Sadeghi is with the Monoclonal Antibody Research Center, Avicenna Research Institute, Academic Center for Education, Culture and Research, Tehran, Iran
| | - Aida Javidan
- L. Giahi is with the Reproductive Biotechnology Research Center, Avicenna Research Institute, Academic Center for Education, Culture and Research, Tehran, Iran. S. Mohammadmoradi and A. Javidan are with the Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA. M.R. Sadeghi is with the Monoclonal Antibody Research Center, Avicenna Research Institute, Academic Center for Education, Culture and Research, Tehran, Iran
| | - Mohammad Reza Sadeghi
- L. Giahi is with the Reproductive Biotechnology Research Center, Avicenna Research Institute, Academic Center for Education, Culture and Research, Tehran, Iran. S. Mohammadmoradi and A. Javidan are with the Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA. M.R. Sadeghi is with the Monoclonal Antibody Research Center, Avicenna Research Institute, Academic Center for Education, Culture and Research, Tehran, Iran
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10
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Yarosh SL, Kokhtenko EV, Churnosov MI, Solodilova MA, Polonikov AV. Joint effect of glutathione S-transferase genotypes and cigarette smoking on idiopathic male infertility. Andrologia 2014; 47:980-6. [PMID: 25348056 DOI: 10.1111/and.12367] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2014] [Indexed: 01/01/2023] Open
Abstract
Inconsistent results of association studies investigated the role of glutathione S-transferase genes in idiopathic male infertility may be explained by ethnical differences in gene-gene and gene-environment interactions. In this study, we investigated a joint contribution of GSTM1, GSTT1 and GSTP1 gene polymorphisms and cigarette smoking to the risk of idiopathic infertility in Russian men. DNA samples from 203 infertile and 227 fertile men were genotyped by a multiplex polymerase chain reaction (GSTM1 and GSTT1 deletions) and PCR-restriction fragment length polymorphism (GSTP1 I105V) methods. The GSTP1 genotype 105IV was associated with increased risk of male infertility (OR = 1.50 95% CI 1.02-2.20 P = 0.04). Genotype combinations GSTP1 105II/GSTT1 del (G1), GSTM1 del/GSTT1 del (G2) and GSTM1 + /GSTT1 del (G3) were associated with decreased risk of male infertility (P ≤ 0.003), whereas a genotype combination GSTP1 105IV/GSTT1 + (G4) was associated with increased disease risk (P = 0.001). The genotype combinations G3 and G4 showed a significant association with infertility in smokers; however, nonsmokers carriers did show the disease risk. In conclusion, GSTM1, GSTT1 and GSTP1 genes are collectively involved in the development of idiopathic male infertility and their phenotypic effects on the disease risk are potentiated by cigarette smoking.
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Affiliation(s)
- S L Yarosh
- Department of Biology, Medical Genetics and Ecology, Kursk State Medical University, Kursk, Russia.,Family Planning and Reproductive Health Clinic, Regional Perinatal Center, Kursk, Russia
| | - E V Kokhtenko
- Department of Zoology and Theory of Evolution, Kursk State University, Kursk, Russia
| | - M I Churnosov
- Department of Medical Biological Disciplines, Belgorod State National Research University, Belgorod, Russia
| | - M A Solodilova
- Department of Biology, Medical Genetics and Ecology, Kursk State Medical University, Kursk, Russia
| | - A V Polonikov
- Department of Biology, Medical Genetics and Ecology, Kursk State Medical University, Kursk, Russia
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11
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Roshdy OH, Hussein TM, Zakaria NH, Sabry AA. Glutathione S-transferase Mu-1 gene polymorphism in Egyptian patients with idiopathic male infertility. Andrologia 2014; 47:587-93. [PMID: 25130880 DOI: 10.1111/and.12306] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/07/2014] [Indexed: 01/16/2023] Open
Abstract
The aim of this study was to examine whether an association exists between glutathione S-transferase Mu-1 (GSTM1) gene polymorphism and idiopathic male infertility. Sixty men with primary idiopathic infertility and 60 fertile men, serving as controls, were recruited for the study. The polymorphism was analysed using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique. The frequency of GSTM1 null genotype was observed to be higher in infertile men 40% in comparison with 33.3% in the fertile men, but this difference was not statistically significant. There was statistically significant difference between cases and controls as regards GSTM1 genotype distribution ((MC) P = 0.006*) in GSTM1-positive men. Patients with the GSTM1 null genotype had significantly lower sperm concentrations and total sperm count when compared with patients with GSTM1-positive genotype. In the control group, men with GSTM1 null genotype had significantly lower sperm concentrations but not total sperm count when compared with men with GSTM1-positive genotype. The results of this study suggest a possible negative effect of GSTM1 null genotype on the spermatogenic potential of the testis.
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Affiliation(s)
- O H Roshdy
- Department of Dermatology, Venereology and Andrology, Faculty of Medicine, University of Alexandria, Alexandria, Egypt
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Yarosh SL, Kokhtenko EV, Churnosov MI, Ataman AV, Solodilova MA, Polonikov AV. Synergism between the N-acetyltransferase 2 gene and oxidant exposure increases the risk of idiopathic male infertility. Reprod Biomed Online 2014; 29:362-9. [PMID: 24928356 DOI: 10.1016/j.rbmo.2014.04.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 04/24/2014] [Accepted: 04/29/2014] [Indexed: 12/14/2022]
Abstract
N-acetyltransferase (NAT2) is a phase-II xenobiotic-metabolizing enzyme participating in the detoxification of toxic arylamines, aromatic amines and hydrazines. The present study was designed to investigate whether two common single-nucleotide polymorphisms (SNP) of the NAT2 gene (481C>T, rs1799929; 590G>A, rs1799930) are associated with susceptibility to idiopathic male infertility and to assess if the risk is modified by oxidant and antioxidant exposures. A total 430 DNA samples (203 infertile patients and 227 fertile men) were genotyped for the polymorphisms by PCR and restriction fragment length polymorphism. No association was found between the NAT2 polymorphisms and idiopathic male infertility. However, gene-environment interaction analysis revealed that a low-acetylation genotype, 590GA, was significantly associated with increased disease risk in men who had environmental risk factors such as cigarette smoking (OR 1.71, 95% CI 1.02-2.87, P = 0.042), alcohol abuse (OR 2.14, 95% CI 1.08-4.27, P = 0.029) and low fruit/vegetable intake (OR 1.68, 95% CI 1.01-2.79, P = 0.04). This pilot study found, as far as is known for the first time, that the polymorphism 590G>A of NAT2 is a novel genetic marker for susceptibility to idiopathic male infertility, but the risk is potentiated by exposure to various environmental oxidants.
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Affiliation(s)
- Sergey L Yarosh
- Department of Biology, Medical Genetics and Ecology, Kursk State Medical University, Kursk, Russian Federation; Family Planning and Reproductive Health Clinic, Regional Perinatal Center, Kursk, Russian Federation
| | - Elena V Kokhtenko
- Department of Zoology and Theory of Evolution, Kursk State University, Kursk, Russian Federation
| | - Mikhail I Churnosov
- Department of Medical Biological Disciplines, Belgorod State National Research University, Belgorod, Russian Federation
| | | | - Maria A Solodilova
- Department of Biology, Medical Genetics and Ecology, Kursk State Medical University, Kursk, Russian Federation
| | - Alexey V Polonikov
- Department of Biology, Medical Genetics and Ecology, Kursk State Medical University, Kursk, Russian Federation.
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Ying HQ, Qi Y, Pu XY, Liu SR, A ZC. Association of GSTM1 and GSTT1 genes with the susceptibility to male infertility: result from a meta-analysis. Genet Test Mol Biomarkers 2013; 17:535-42. [PMID: 23631429 DOI: 10.1089/gtmb.2012.0409] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The deletion polymorphisms of the glutathione S-transferase M1 (GSTM1) and glutathione S-transferase T1 (GSTT1) genes were considered as candidates for genetic susceptibility factors of male infertility. Previous studies concerning the relationship between the null genotype of the two genes and male infertility have been reported in recent years. However, the results remain elusive. A meta-analysis was performed to estimate the relationship between the deletion polymorphism of the GSTM1 or GSTT1 gene, and male infertility in this study. Sixteen studies concerning the GSTM1 gene, including 2174 cases and 1861 controls, and 13 case-control studies on the GSTT1 gene with a total number of 1992 cases and 1617 controls were processed. The results showed that the null genotype of the GSTM1 gene was associated with male infertility in the overall populations (P=0.003, OR=1.40, 95%CI=1.12-1.75), especially in Caucasian (P=0.012, OR=1.50, 95%CI=1.09-2.07) as well as Chinese (P=0.001, OR=1.55, 95%CI=1.19-2.03). The null genotype of the GSTT1 gene was strongly related to male infertility only in Chinese (P=0.000, OR=1.70, 95%CI=1.34-2.14). These results indicated that the null genotype of the GSTM1 gene might contribute to the susceptibility of male infertility, whereas the null genotype of the GSTT1 gene may be a genetic susceptibility factor of male infertility for the Chinese.
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Affiliation(s)
- Hou-Qun Ying
- Department of Genetics, College of Agriculture and Biology, Dali University, China
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Yarosh SL, Kokhtenko EV, Starodubova NI, Churnosov MI, Polonikov AV. Smoking status modifies the relation between CYP1A1*2C gene polymorphism and idiopathic male infertility: the importance of gene-environment interaction analysis for genetic studies of the disease. Reprod Sci 2013; 20:1302-7. [PMID: 23548414 DOI: 10.1177/1933719113483013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The study was designed to investigate the associations of polymorphisms Ile462Val and 3801T>C of the cytochrome P450 1A1 (CYP1A1) gene with idiopathic male infertility (IMI) and to assess the impact of smoking status on the relationship between the polymorphisms and the susceptibility to the disease. DNA samples from 203 patients with IMI and 227 fertile men were genotyped for the polymorphisms by a polymerase chain reaction and restriction fragment length polymorphism methods. We found for the first time that the increased risk of IMI in carriers of genotype 462Ile/Val of the CYP1A1 gene occurred only in smoker men (odds ratio [OR] = 1.91; 95% confidence interval [CI] 1.01-3.59), whereas nonsmoker men did not have the risk of infertility (OR = 1.58; 95% CI 0.66-3.76). The results of our study demonstrate that the analysis of gene-environment interactions is necessary to explain conflicting results of genetic studies of IMI and to improve our understanding of the mechanisms of the disease.
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Affiliation(s)
- Sergey L Yarosh
- 1Family Planning and Reproductive Health Clinic, Regional Perinatal Center, Kursk, Russian Federation
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Wu W, Lu J, Tang Q, Zhang S, Yuan B, Li J, Di Wu, Sun H, Lu C, Xia Y, Chen D, Sha J, Wang X. GSTM1 and GSTT1 null polymorphisms and male infertility risk: an updated meta-analysis encompassing 6934 subjects. Sci Rep 2013; 3:2258. [PMID: 23877133 PMCID: PMC6505401 DOI: 10.1038/srep02258] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Accepted: 07/01/2013] [Indexed: 11/26/2022] Open
Abstract
Published data on the association between the GST genes polymorphisms and male infertility risk are inconclusive. We investigated GST genes polymorphisms in a large sample size case-control study, and conducted a literature-based meta-analysis of 6934 individuals. Our case-control study showed the GSTM1 null genotype was significantly associated with idiopathic oligozoospermia, while the null genotype of GSTT1 was significantly associated with normozoospermia and azoospermia. Additionally, significantly elevated GSTT1 expression levels were observed in present genotype compared with null genotype. In the meta-analysis, the null genotype of GSTM1 was associated with a significantly increased risk of male infertility. Furthermore, a stratification analysis showed that the risk of GSTM1 polymorphism was associated with male infertility in both Asian and Caucasian groups. Further studies of GSTM1 and GSTT1 with their biological functions are needed to understand the role of these genes in the development of male infertility.
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Affiliation(s)
- Wei Wu
- State Key Laboratory of Reproductive Medicine, Wuxi Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, Wuxi 214002, China.
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Li X, Pan J, Liu Q, Xiong E, Chen Z, Zhou Z, Su Y, Lu G. Glutathione S-transferases gene polymorphisms and risk of male idiopathic infertility: a systematic review and meta-analysis. Mol Biol Rep 2012; 40:2431-8. [PMID: 23238917 DOI: 10.1007/s11033-012-2323-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Accepted: 11/19/2012] [Indexed: 01/18/2023]
Abstract
The Glutathione S-transferases (GSTs) polymorphisms have been implicated in susceptibility to male idiopathic infertility, but study results are still controversial. To investigate the genetic associations between GSTs polymorphisms and risk of male idiopathic infertility, a systematic review and meta-analysis were performed. Meta-analysis was performed by pooling odds ratio (OR) with its corresponding 95 % confidence interval (95 % CI) form studies in electronic databases up to March 16, 2012. Glutathione S-transferase M 1 (GSTM1) null genotype, Glutathione S-transferase T 1 (GSTT1) null genotype, and dual null genotype of GSTM1/GSTT1 were analyzed independently. 14 eligible studies with a total of 1,845 idiopathic infertility males and 1,729 controls were included. There were 13 studies on GSTM1 polymorphism, 10 ones on GSTT1 polymorphism and 5 ones on GSTM1-GSTT1 interaction analysis. Meta-analyses of total relevant studies showed GSTM1 null genotype was significantly associated with an increased risk of male idiopathic infertility (OR = 1.40, 95 % CI 1.07-1.84, P OR = 0.015). The GSTM1-GSTT1 interaction analysis showed dual null genotype of GSTM1/GSTT1 was also significantly associated with increased risk of male idiopathic infertility (OR = 1.85, 95 % CI 1.07-3.21, P OR = 0.028). Subgroup analyses by ethnicity showed the associations above were still statistically significant in Caucasians (For GSTM1, OR = 1.51, 95 % CI 1.11-2.05, P OR = 0.009; For GSTM1/GSTT1, OR = 2.10, 95 % CI 1.51-2.91, P OR < 0.001). This meta-analysis suggests GSTM1 null genotype contributes to increased risk of male idiopathic infertility in Caucasians, and males with dual null genotype of GSTM1/GSTT1 are particularly susceptible to developing idiopathic infertility.
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Affiliation(s)
- Xin Li
- Urologic Institute of PLA, Southwest Hospital, Third Military Medical University, 30 Gaotanyan Street, Shapingba District, Chongqing, 400038, China
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Association of the Glutathione S-transferases M1 and T1 polymorphism with male infertility: a meta-analysis. J Assist Reprod Genet 2012; 30:131-41. [PMID: 23239128 DOI: 10.1007/s10815-012-9907-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Accepted: 10/31/2012] [Indexed: 10/27/2022] Open
Abstract
BACKGROUND Genes of different pathways regulate spermatogenesis, and the complexity of the spermatogenic process indicates that polymorphisms or mutations in these genes could cause male infertility. Published data on the association between the GSTM1 and GSTT1 polymorphism and male infertility risk are inconclusive. To derive a more precise estimation of the relationship, a meta-analysis was performed. METHODS A total of 11 studies regarding GSTM1 and 9 studies regarding GSTT1 between 1999 and 2012 were identified through researching MEDLINE, EMBASE and the Chinese Biomedical Database. It was performed to obtain summary estimated odd ratios and 95 % confidence intervals of GSTM1 and GSTT1 for male infertility, with attention to study quality and publication bias. RESULTS Overall, a significant association was seen between GSTM1 (OR=1.20, 95 % CI=1.02-1.40, P(heterogeneity) =0.000, P=0.027) genotypes and male infertility. Significant associations were also observed in subgroups of Caucasian populations (OR=1.65, 95 %CI=1.16-2.34, P(heterogeneity) =0.006, P=0.005), but were not observed in Asian populations (OR=1.09, 95 % CI=0.72-1.65, P(heterogeneity) =0.054, P=0.697) when stratified by ethnicity. While there was no significant association was seen between GSTT1 (OR=1.00, 95 % CI=0.74-1.35, P(heterogeneity) =0.000, P=0.980) null genotypes and male infertility. Simultaneously, significant associations were not observed in subgroups of Caucasian populations (OR=0.94, 95 %CI=0.44-2.00, P(heterogeneity) =0.000, P=0.867) and Asian populations (OR=0.93, 95 % CI=0.46-1.87, P(heterogeneity) =0.002, P=0.838) when stratified by ethnicity. CONCLUSION Our results suggest the GSTM1 null genotype contributes to male infertility susceptibility, while GSTT1 gene polymorphisms are not associated with male infertility in our study.
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Tang M, Wang S, Wang W, Cao Q, Qin C, Liu B, Li P, Zhang W. The glutathione-S-transferase gene polymorphisms (GSTM1 and GSTT1) and idiopathic male infertility risk: a meta-analysis. Gene 2012; 511:218-23. [PMID: 23026209 DOI: 10.1016/j.gene.2012.09.054] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 09/14/2012] [Accepted: 09/20/2012] [Indexed: 11/19/2022]
Abstract
Published data on the association between male infertility and the glutathione-S-transferase (GST) gene polymorphism are inclusive. To drive a more precise estimation, we performed a meta-analysis based on 1897 cases and 1785 controls from 15 published case-control studies. PubMed and CBMdisc literature research were conducted to identify all eligible studies investigating such a relationship. Crude odds ratios (ORs) with 95% confidence intervals (CIs) were calculated to estimate the strength of the association. In the overall analysis, the frequency of glutathione-S-transferase Mu-1 (GSTM1) null genotype was significantly associated with susceptibility to idiopathic male infertility. In further stratified analysis by sperm concentration of the case group, no significantly increased risk of azoospermia was found in either GSTM1 null or glutathione-S-transferase Theta-1 (GSTT1) null genotype. Compared with a significant relationship between GSTM1 null genotype and oligoasthenoteratozoospermia (OAT), GSTT1 null genotype was not associated with the OAT risk. Additionally, a subgroup analysis on ethnicity showed no notable association between the polymorphism and the risk of idiopathic male infertility in any of GSTM1 null and GSTT1 null genotype, neither in Asian nor in European populations. In conclusion, these results support that the GSTM1 null genotype mainly contributes to idiopathic male infertility susceptibility, particularly to OAT.
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Affiliation(s)
- Min Tang
- State Key Laboratory of Reproductive Medicine, Department of Urology, First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing 210029, China
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Eslamian G, Amirjannati N, Rashidkhani B, Sadeghi MR, Hekmatdoost A. Intake of food groups and idiopathic asthenozoospermia: a case-control study. Hum Reprod 2012; 27:3328-36. [PMID: 22940769 DOI: 10.1093/humrep/des311] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
STUDY QUESTION Is there any association between the intake of different food groups and the risk of idiopathic asthenozoospermia? SUMMARY ANSWER A high intake of processed meat and sweets was positively associated with a higher risk of asthenozoospermia, whereas a high intake of fruits, vegetables, poultry, skim milk and sea foods was associated with a lower risk. WHAT IS KNOWN ALREADY A high intake of lipophilic foods like meat products or milk may be negatively associated with semen quality in humans, whereas some fruits or vegetables may maintain or improve semen quality. STUDY DESIGN, SIZE, DURATION A case-control study including 72 asthenozoospermic men and 169 normozoospermic men all from infertile couples who underwent face-to-face private interviews, from January 2011 to December 2011. PARTICIPANTS/MATERIALS, SETTING, METHODS Semen was assessed by volume, sperm concentration, motility and morphology. Usual dietary intakes were assessed using a semi-quantitative food frequency questionnaire. Odds ratios (ORs), 95% confidence intervals (CIs) and evaluation of trends were calculated using logistic regression. The first tertile served as the reference category for regression analyses. MAIN RESULTS AND THE ROLE OF CHANCE After adjusting for potential confounders, the risk of asthenozoospermia was significantly higher in the highest tertiles of processed meat (OR: 2.03, 95% CI: 1.70-2.44) and sweets intake (OR: 2.05, 95% CI: 1.09-2.26). Conversely, being in the highest tertile of total fruits and vegetables, the intake of dark green vegetables, skim milk, poultry and sea food intake was associated with a lower risk of asthenozoospermia (P for trend = 0.04, 0.01, 0.02, 0.03 and 0.04, respectively). LIMITATIONS, REASONS FOR CAUTION Recall bias, selection bias and measurement bias are inevitable in this kind of study and residual confounding due to omission or imprecise measurement of important covariates remains possible. WIDER IMPLICATIONS OF THE FINDINGS Patients with asthenozoospermia should be advised to adhere to a diet rich in fruits, vegetables, poultry, skim milk and sea foods while low in processed meat and sweets. STUDY FUNDING/COMPETING INTEREST(S) This study was financially supported by the National Nutrition and Food Technology Research Institute, Faculty of Nutrition and Food Technology, Shahid Beheshti University of Medical Science, Tehran, Iran. No conflict of interests to declare.
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Affiliation(s)
- Ghazaleh Eslamian
- Students Research Committee, Faculty of Nutrition and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Science, Tehran, Iran
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GSTM1 null genotype contributes to increased risk of male infertility: a meta-analysis. J Assist Reprod Genet 2012; 29:837-45. [PMID: 22622525 DOI: 10.1007/s10815-012-9790-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Accepted: 04/25/2012] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Many studies have investigated the association between Glutathione S-Transferase M 1 (GSTM1) null genotype and risk of male infertility, but the impact of GSTM1 null genotype on infertility risk is unclear owing to the obvious inconsistency among those studies. This study aimed to quantify the strength of association between GSTM1 null genotype and risk of male infertility. METHODS We searched the PubMed, Embase and Wangfang databases for studies investigating the association between GSTM1 null genotype and risk of male infertility. We estimated pooled odds ratio (OR) with its 95 % confidence interval (95 % CI) to assess this possible association. RESULTS Twelve case-control studies with 1, 589 infertility cases and 1, 537 controls were included. Meta-analysis of total 12 studies showed that GSTM1 null genotype was associated with increased risk of male infertility (OR = 1.34, 95%CI 1.02-1.77, P = 0.036). In subgroup analysis of Caucasians, there was also an obvious association between GSTM1 null genotype and increased risk of male infertility (OR = 1.51, 95%CI 1.11-2.05, P = 0.006). Sensitivity analyses by sequential omission of individual studies or omitting studies without high quality did not significantly alter the overall pooled OR. Cumulative meta-analysis further showed a trend of more obvious association as information accumulated. No evidence of publication bias was observed. CONCLUSION Meta-analyses of available data suggest that GSTM1 null genotype contributes to increased risk of male infertility.
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