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Carrasco-Cabezas M, Assmann TS, Martínez P, Cerpa L, Calfunao S, Echiburú B, Maliqueo M, Crisosto N, Salas-Pérez F. Folate and Vitamin B12 Levels in Chilean Women with PCOS and Their Association with Metabolic Outcomes. Nutrients 2024; 16:1937. [PMID: 38931291 PMCID: PMC11206694 DOI: 10.3390/nu16121937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Revised: 06/12/2024] [Accepted: 06/13/2024] [Indexed: 06/28/2024] Open
Abstract
Polycystic ovary syndrome (PCOS) is a common endocrine disorder that affects women of reproductive age. Many women with PCOS have been found to have an unbalanced diet and deficiencies in essential nutrients. This study aimed to assess the levels of folate and vitamin B12 (B12) and their relationship with metabolic factors in women with PCOS. Anthropometric, clinical, and genetic analyses were conducted to evaluate markers related to one-carbon metabolism in women with PCOS and in a control group. The PCOS group had a higher BMI and HOMA-IR (1.7 vs. 3.1; p < 0.0001). HDL cholesterol levels were 23% lower and triglyceride levels were 74% higher in women with PCOS. Although there were no significant differences in folate and B12 levels between the PCOS and control groups, over 60% of women with PCOS had low B12 levels (<300 pg/mL) and high homocysteine levels. In addition, the MTHFR A1298C and C677T polymorphisms were not associated with PCOS. Moreover, erythrocyte folate levels were positively correlated with fasting glucose, triglycerides, and free androgen index, and negatively correlated with SHBG and LH levels. These results suggest that B vitamins may be associated with the metabolic phenotype in PCOS. This study emphasizes the potential link between folate, vitamin B12, and metabolic and hormonal outcomes in women with PCOS.
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Affiliation(s)
- Matías Carrasco-Cabezas
- Laboratory of Chemical Carcinogenesis and Pharmacogenetics, Faculty of Medicine, Universidad de Chile, Santiago 8320000, Chile; (M.C.-C.); (L.C.); (S.C.)
| | - Taís Silveira Assmann
- Graduate Program in Medical Sciences, Endocrinology, Department of Internal Medicine, Faculty of Medicine, Federal University of Rio Grande do Sul, Porto Alegre 90035-003, Brazil;
| | - Paz Martínez
- Laboratory of Endocrinology and Metabolism, Department of Internal Medicine, West Division, Faculty of Medicine, Universidad de Chile, Santiago 8320000, Chile; (P.M.); (B.E.); (M.M.); (N.C.)
- Health Sciences Institute, Universidad de O’Higgins, Rancagua 3070000, Chile
| | - Leslie Cerpa
- Laboratory of Chemical Carcinogenesis and Pharmacogenetics, Faculty of Medicine, Universidad de Chile, Santiago 8320000, Chile; (M.C.-C.); (L.C.); (S.C.)
- Latin American Network for Implementation and Validation of Clinical Pharmacogenomics Guidelines (RELIVAF-CYTED), Santiago 8320000, Chile
| | - Susan Calfunao
- Laboratory of Chemical Carcinogenesis and Pharmacogenetics, Faculty of Medicine, Universidad de Chile, Santiago 8320000, Chile; (M.C.-C.); (L.C.); (S.C.)
| | - Bárbara Echiburú
- Laboratory of Endocrinology and Metabolism, Department of Internal Medicine, West Division, Faculty of Medicine, Universidad de Chile, Santiago 8320000, Chile; (P.M.); (B.E.); (M.M.); (N.C.)
| | - Manuel Maliqueo
- Laboratory of Endocrinology and Metabolism, Department of Internal Medicine, West Division, Faculty of Medicine, Universidad de Chile, Santiago 8320000, Chile; (P.M.); (B.E.); (M.M.); (N.C.)
| | - Nicolás Crisosto
- Laboratory of Endocrinology and Metabolism, Department of Internal Medicine, West Division, Faculty of Medicine, Universidad de Chile, Santiago 8320000, Chile; (P.M.); (B.E.); (M.M.); (N.C.)
- Endocrinology Unit, Department of Medicine, Clínica Alemana de Santiago, Faculty of Medicine, Universidad del Desarrollo, Santiago 7650568, Chile
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Sharma P, Bilkhiwal N, Chaturvedi P, Kumar S, Khetarpal P. Potential environmental toxicant exposure, metabolizing gene variants and risk of PCOS-A systematic review. Reprod Toxicol 2021; 103:124-132. [PMID: 34126208 DOI: 10.1016/j.reprotox.2021.06.005] [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] [Received: 02/06/2021] [Revised: 05/12/2021] [Accepted: 06/02/2021] [Indexed: 10/21/2022]
Abstract
Exposure of environmental toxicants such as potentially toxic metals and pesticides have largely been attributed to produce adverse effects on general women's health and to be more precise on the reproductive system. In order to explore exposure of toxicants and metabolizing gene variants as risk factor for polycystic ovarian syndrome (PCOS), literature search was carried out using the databases PubMed, Central Cochrane Library, Google Scholar, Science Direct with appropriate keywords upto 6 December 2020. While most of the studies indicate higher serum Cu concentration and lower concentration of Mn as risk factor, studies also report presence of higher pesticide concentration in PCOS women. Genes such as MTHFR, CYPs participate in the metabolism of toxicants and may show different response due to underlying genetic variants. Thus, toxicant exposure are to some extent responsible for the pathogenesis of syndrome through oxidative stress and endocrine disruption, but the susceptibility may vary due to the underlying genetic polymorphism of the exposed population.
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Affiliation(s)
- Priya Sharma
- Department of Human Genetics and Molecular Medicine, School of Health Sciences, Central University of Punjab, Bathinda, 151401, India
| | - Nisha Bilkhiwal
- Department of Human Genetics and Molecular Medicine, School of Health Sciences, Central University of Punjab, Bathinda, 151401, India
| | - Pragya Chaturvedi
- Department of Human Genetics and Molecular Medicine, School of Health Sciences, Central University of Punjab, Bathinda, 151401, India
| | - Sachin Kumar
- Department of Mathematics and Statistics, School of Basic and Applied Sciences, Central University of Punjab, Bathinda, 151401, India.
| | - Preeti Khetarpal
- Department of Human Genetics and Molecular Medicine, School of Health Sciences, Central University of Punjab, Bathinda, 151401, India.
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Methylenetetrahydrofolate reductase gene polymorphisms in the risk of polycystic ovary syndrome and ovarian cancer. Biosci Rep 2021; 40:225735. [PMID: 32639550 PMCID: PMC7369393 DOI: 10.1042/bsr20200995] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 06/23/2020] [Accepted: 07/08/2020] [Indexed: 12/15/2022] Open
Abstract
Polymorphisms of methylenetetrahydrofolate reductase (MTHFR) in hormone metabolism pathways might cause metabolic disturbances and contribute to the development of polycystic ovary syndrome (PCOS) and ovarian cancer, but the published studies were inconsistent. The aim of the present study was to evaluate the MTHFR C677T (rs1801133) and A1298C (rs1801131) gene polymorphisms in the risk of PCOS and ovarian cancer by meta-analysis. A comprehensive electronic search was conducted in databases for studies published from 1995 to 2020. The pooled ORs were calculated by Revman 5.2 software. Twenty-nine articles including 45 case–control studies were included. We found that MTHFR C677T polymorphisms were correlated with elevated PCOS risk (TT vs. CT+CC: OR = 1.41, 95%CI = 1.20–1.67; TT+CT vs. CC: OR = 1.54, 95%CI = 1.07–2.22; CT vs. CC+TT: OR = 1.18, 95%CI 1.04–1.33; TT vs. CC: OR = 1.47, 95%CI = 1.03–2.11; T vs. C: OR = 1.25, 95%CI = 1.06–1.47), which were more obvious in Middle Eastern subgroup. MTHFR A1298C polymorphisms were also associated with overall PCOS susceptibility (CC vs. AC+AA: OR = 2.55, 95% CI = 1.61–4.03; CC+AC vs. AA: OR = 1.84, 95%CI = 1.04–3.28; CC vs. AA: OR = 2.66, 95%CI = 1.68–4.22; C vs. A: OR = 1.67, 95%CI = 1.03–2.71), which were mainly reflected in Asian subjects. For ovarian cancer, MTHFR C677T polymorphisms were only related with elevated ovarian cancer risk in Asian population, while no significant association was found for A1298C polymorphisms. This meta-analysis suggested that MTHFR C677T and MTHFR A1298C polymorphisms were correlated with elevated PCOS risk. MTHFR C667T only posed a higher risk for ovarian cancer in Asians instead of other populations, while MTHFR A1298C polymorphisms were not related to ovarian cancer risk. Further studies are needed to validate the conclusion.
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Ganie MA, Vasudevan V, Wani IA, Baba MS, Arif T, Rashid A. Epidemiology, pathogenesis, genetics & management of polycystic ovary syndrome in India. Indian J Med Res 2020; 150:333-344. [PMID: 31823915 PMCID: PMC6902362 DOI: 10.4103/ijmr.ijmr_1937_17] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Polycystic ovary syndrome (PCOS) is a common endocrine disorder predominantly affecting women of reproductive age. Clinical manifestations are diverse including hyperandrogenism, anovulation, infertility and increased risk of metabolic diseases besides psychosocial dysfunction. This review provides information on the problem of PCOS in India, its pathophysiology, genetics and an overview of current management options to instigate further research in this field. Prevalence of PCOS in India ranges from 3.7 to 22.5 per cent depending on the population studied and the criteria used for diagnosis. Abnormalities in leptin-adiponectin (adipocyte biology), oxidative stress and autoimmunity are among the mechanisms studied regarding pathogenesis of PCOS. Many candidate gene studies have shown associations with PCOS in various studies. Studies have consistently demonstrated the relationship between the well-known manifestation of hyperandrogenism among Indian PCOS women and the metabolic morbidities including insulin resistance, glucose intolerance and cardiovascular risk. Management of individual components of PCOS can be achieved by medications or surgical methods, though further clarification regarding pathogenesis of PCOS is needed to sharpen our therapeutic armamentarium.
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Affiliation(s)
- Mohammad Ashraf Ganie
- Department of Endocrinology & Metabolism, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Vishnu Vasudevan
- Department of Endocrinology & Metabolism, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Imtiyaz Ahmad Wani
- Department of Endocrinology & Metabolism, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Mohammad Salem Baba
- Department of Endocrinology & Metabolism, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Tasleem Arif
- Department of Endocrinology & Metabolism, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Aafia Rashid
- Department of Endocrinology & Metabolism, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
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Li Y, Zhu H, Liu M, Zeng Z, Zeng Y, Xu X, Ye M. Significant association between methylenetetrahydrofolate reductase gene C677T polymorphism with polycystic ovary syndrome risk: A meta-analysis update. Medicine (Baltimore) 2020; 99:e18720. [PMID: 31977861 PMCID: PMC7004748 DOI: 10.1097/md.0000000000018720] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The methylenetetrahydrofolate reductase (MTHFR) may play a pathological role in polycystic ovary syndrome (PCOS). However, the conclusions of published reports on the relationship between the MTHFR C677T polymorphism and PCOS risk remain controversial.To derive a more precise estimation we performed a metaanalysis based on 22 studies that together included 2405 cases and 2419 controls. PubMed, EMBASE, WanFang and the Chinese National Knowledge Infrastructure databases were used to retrieve articles up to up to October 28, 2019. The crude odds ratios (ORs) with 95% confidence intervals (95% CI) were calculated to evaluate the association.Metaanalysis results showed a significant association between the MTHFR C677T polymorphism and PCOS risk in 3 genetic models (allele model: OR = 1.40, 95% CI = 1.27-1.53; dominant model: OR = 1.47, 95% CI = 1.17-1.85); homozygous model: OR = 1.90, 95% CI = 1.55-2.32). Moreover, significant associations were observed when stratified by ethnicity, source of controls, etiology, and genotype methods.This metaanalysis suggests that the T-allele of the MTHFR C677T polymorphism is associated with an increased risk of PCOS, especially in Asians further studies with larger population sizes are needed to confirm these results.
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Affiliation(s)
- Yin Li
- Gynecology of Tranditional Chinese Medicine, Chengdu University of Traditional Chinese Medicine
| | - Hongqiu Zhu
- Department of Gynaecology, School of Medical and Life Sciences, Chengdu University of Traditional Chinese Medicine/Reproductive and Women-Children Hospital of Chengdu University of Traditional Chinese, Sichuan Province, China
| | - Min Liu
- Gynecology of Tranditional Chinese Medicine, Chengdu University of Traditional Chinese Medicine
| | - Zhulan Zeng
- Gynecology of Tranditional Chinese Medicine, Chengdu University of Traditional Chinese Medicine
| | - Yanling Zeng
- Gynecology of Tranditional Chinese Medicine, Chengdu University of Traditional Chinese Medicine
| | - Xinlei Xu
- Gynecology of Tranditional Chinese Medicine, Chengdu University of Traditional Chinese Medicine
| | - Min Ye
- Gynecology of Tranditional Chinese Medicine, Chengdu University of Traditional Chinese Medicine
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Meta-analysis of association of FTO genetic variation with PCOS must account for obesity. Genomics 2019; 112:2164-2165. [PMID: 31857220 DOI: 10.1016/j.ygeno.2019.12.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 12/12/2019] [Indexed: 01/01/2023]
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Zhu X, Hong X, Chen L, Xuan Y, Huang K, Wang B. Association of methylenetetrahydrofolate reductase C677T and A1298C polymorphisms with genetic susceptibility to polycystic ovary syndrome: A PRISMA-compliant meta-analysis. Gene 2019; 719:144079. [DOI: 10.1016/j.gene.2019.144079] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 08/23/2019] [Accepted: 08/23/2019] [Indexed: 01/06/2023]
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dos Santos TB, de Paula HK, Balarin MAS, Silva-Grecco RL, Lima MFP, de Resende EAMR, Gomes MKO, Cintra MTR. Can the genetic polymorphisms of the folate metabolism have an influence in the polycystic ovary syndrome? ARCHIVES OF ENDOCRINOLOGY AND METABOLISM 2019; 63:501-508. [PMID: 31482954 PMCID: PMC10522273 DOI: 10.20945/2359-3997000000167] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 06/26/2019] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To investigate the association of the genetic variants of the folate metabolism genes (MTHFR C677T; MTHFR A1298C; MTR A2756G; MTRR A66G and RFC-1 A80G) with the development of polycystic ovary syndrome (PCOS). SUBJECTS AND METHODS This study included 203 women (99 women with PCOS and 104 controls). The genotyping was performed by PCR-RFLP. Chi-squared test and multiple logistic regression were used in the statistical analysis. Haplotype analysis was conducted using the SNPstat program. The results were presented in odds ratio (OR) and confidence interval of 95% (CI-95%), with a significance level of 5% (p ≤ 0.05). RESULTS The genotypic distribution of the RFC-1 A80G polymorphism showed significant difference between the two groups, showing that the heterozygous genotype (AG genotype) was most frequent in controls. The polymorphic homozygous (GG genotype) of MTRR A66G polymorphism were most frequent in controls. The T-C haplotype MTHFR C677T and A1298C polymorphisms were more frequent in the control group (OR = 0.19; CI 95% - 0.04 to 0.93 e p = 0.042). The multivariate analysis evidenced that family history of PCOS was more frequent in the PCOS group (OR = 3.29; CI 95% - 1.48 to 7.31; p = 0.003). CONCLUSION In our casuistry, the polymorphic homozygous of MTRR A66G polymorphism gene and heterozygous of RFC-1 A80G polymorphism gene, the haplotype T-C C677T and A1298C polymorphisms of MTHFR gene, can be associated with protective factors for the disease.
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Affiliation(s)
- Tayssia Beatriz dos Santos
- Universidade Federal do Triângulo MineiroUniversidade Federal do Triângulo MineiroUberabaMGBrasilUniversidade Federal do Triângulo Mineiro (UFTM), Uberaba, MG, Brasil
| | - Helena Korres de Paula
- Universidade Federal do Triângulo MineiroUniversidade Federal do Triângulo MineiroUberabaMGBrasilUniversidade Federal do Triângulo Mineiro (UFTM), Uberaba, MG, Brasil
| | - Marly Aparecida Spadotto Balarin
- Universidade Federal do Triângulo MineiroUniversidade Federal do Triângulo MineiroUberabaMGBrasilUniversidade Federal do Triângulo Mineiro (UFTM), Uberaba, MG, Brasil
| | - Roseane Lopes Silva-Grecco
- Universidade Federal do Triângulo MineiroUniversidade Federal do Triângulo MineiroUberabaMGBrasilUniversidade Federal do Triângulo Mineiro (UFTM), Uberaba, MG, Brasil
| | - Marco Fábio Prata Lima
- Universidade Federal do Triângulo MineiroUniversidade Federal do Triângulo MineiroUberabaMGBrasilUniversidade Federal do Triângulo Mineiro (UFTM), Uberaba, MG, Brasil
| | | | - Mariana Kefalas Oliveira Gomes
- Universidade Federal do Triângulo MineiroUniversidade Federal do Triângulo MineiroUberabaMGBrasilUniversidade Federal do Triângulo Mineiro (UFTM), Uberaba, MG, Brasil
| | - Mariangela Torreglosa Ruiz Cintra
- Universidade Federal do Triângulo MineiroUniversidade Federal do Triângulo MineiroUberabaMGBrasilUniversidade Federal do Triângulo Mineiro (UFTM), Uberaba, MG, Brasil
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Irimie AI, Braicu C, Pasca S, Magdo L, Gulei D, Cojocneanu R, Ciocan C, Olariu A, Coza O, Berindan-Neagoe I. Role of Key Micronutrients from Nutrigenetic and Nutrigenomic Perspectives in Cancer Prevention. ACTA ACUST UNITED AC 2019; 55:medicina55060283. [PMID: 31216637 PMCID: PMC6630934 DOI: 10.3390/medicina55060283] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 05/28/2019] [Accepted: 06/13/2019] [Indexed: 02/06/2023]
Abstract
Regarding cancer as a genetic multi-factorial disease, a number of aspects need to be investigated and analyzed in terms of cancer's predisposition, development and prognosis. One of these multi-dimensional factors, which has gained increased attention in the oncological field due to its unelucidated role in risk assessment for cancer, is diet. Moreover, as studies advance, a clearer connection between diet and the molecular alteration of patients is becoming identifiable and quantifiable, thereby replacing the old general view associating specific phenotypical changes with the differential intake of nutrients. Respectively, there are two major fields concentrated on the interrelation between genome and diet: nutrigenetics and nutrigenomics. Nutrigenetics studies the effects of nutrition at the gene level, whereas nutrigenomics studies the effect of nutrients on genome and transcriptome patterns. By precisely evaluating the interaction between the genomic profile of patients and their nutrient intake, it is possible to envision a concept of personalized medicine encompassing nutrition and health care. The list of nutrients that could have an inhibitory effect on cancer development is quite extensive, with evidence in the scientific literature. The administration of these nutrients showed significant results in vitro and in vivo regarding cancer inhibition, although more studies regarding administration in effective doses in actual patients need to be done.
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Affiliation(s)
- Alexandra Iulia Irimie
- Department of Prosthetic Dentistry and Dental Materials, Division Dental Propaedeutics, Aesthetic, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, 23 Marinescu Street, 40015 Cluj-Napoca, Romania.
| | - Cornelia Braicu
- Research Center for Functional Genomics and Translational Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, 23 Marinescu Street, 40015 Cluj-Napoca, Romania.
| | - Sergiu Pasca
- Research Center for Functional Genomics and Translational Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, 23 Marinescu Street, 40015 Cluj-Napoca, Romania.
| | - Lorand Magdo
- Research Center for Functional Genomics and Translational Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, 23 Marinescu Street, 40015 Cluj-Napoca, Romania.
| | - Diana Gulei
- MEDFUTURE-Research Center for Advanced Medicine, University of Medicine and Pharmacy Iuliu Hatieganu, 23 Marinescu Street, 40015 Cluj-Napoca, Romania.
| | - Roxana Cojocneanu
- Research Center for Functional Genomics and Translational Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, 23 Marinescu Street, 40015 Cluj-Napoca, Romania.
| | - Cristina Ciocan
- MEDFUTURE-Research Center for Advanced Medicine, University of Medicine and Pharmacy Iuliu Hatieganu, 23 Marinescu Street, 40015 Cluj-Napoca, Romania.
| | - Andrei Olariu
- Nordlogic Software, 10-12, Rene Descartes Street 400486 Cluj-Napoca, Romania.
| | - Ovidiu Coza
- Department of Radiotherapy with High Energies and Brachytherapy, Oncology Institute "Prof. Dr. Ion Chiricuta", Street Republicii, No. 34-36, 400015 Cluj-Napoca, Romania.
- Department of Radiotherapy and Medical Oncology, "Iuliu Hatieganu" University of Medicine and Pharmacy, Street Louis Pasteur, No. 4, 400349 Cluj-Napoca, Romania.
| | - Ioana Berindan-Neagoe
- Research Center for Functional Genomics and Translational Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, 23 Marinescu Street, 40015 Cluj-Napoca, Romania.
- MEDFUTURE-Research Center for Advanced Medicine, University of Medicine and Pharmacy Iuliu Hatieganu, 23 Marinescu Street, 40015 Cluj-Napoca, Romania.
- Department of Functional Genomics and Experimental Pathology, "Prof. Dr. Ion Chiricuta" The Oncology Institute, 34-36 Republicii Street, 400015 Cluj-Napoca, Romania.
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Singh V, Bansal SK, Sudhakar DVS, Chakraborty A, Trivedi S, Gupta G, Thangaraj K, Rajender S, Singh K. SNPs in ERCC1, ERCC2, and XRCC1 genes of the DNA repair pathway and risk of male infertility in the Asian populations: association study, meta-analysis, and trial sequential analysis. J Assist Reprod Genet 2018; 36:79-90. [PMID: 30390177 DOI: 10.1007/s10815-018-1339-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 10/12/2018] [Indexed: 01/05/2023] Open
Abstract
PURPOSE We investigated if substitutions in the ERCC1, ERCC2, and XRCC1 genes of the DNA repair pathway correlate with non-obstructive azoospermia and male infertility. METHODS A total of 548 azoospermic infertile males and 410 fertile controls were genotyped for XRCC1 399A > G, 280G > A, and ERCC1 C > A 3' UTR and 541 azoospermic infertile males and 416 fertile controls were genotyped for ERCC2 751A > C using iPLEX Gold Assay. Meta-analyses were performed on XRCC1 399A > G (1022 cases and 1004 controls), ERCC1 C > A 3' UTR (879 cases and 1059 controls), and ERCC2 751A > C (914 cases and 850 controls) polymorphisms to quantitatively estimate the significance of the association between these polymorphisms and the risk of infertility. RESULTS Statistically significant association between ERCC2 751A > C SNP and male infertility was found using the codominant model (p = 0.03). Results of meta-analysis suggested a lack of correlation with male infertility risk, which could be due to pooling of studies from different ethnic populations. Due to limited the number of studies, a stratified analysis for different ethnic groups could not be performed. CONCLUSION (S) In conclusion, AA genotype of 751A > C SNP in ERCC2 correlated with a higher risk of male infertility and may contribute to an increased risk of azoospermia and male infertility in Indian men.
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Affiliation(s)
- Vertika Singh
- Department of Molecular & Human Genetics, Banaras Hindu University, Varanasi, 221005, India
| | | | - D V S Sudhakar
- CSIR-Centre for Cellular and Molecular Biology (CCMB), Hyderabad, India
| | - Arijit Chakraborty
- Department of Molecular & Human Genetics, Banaras Hindu University, Varanasi, 221005, India
| | - Sameer Trivedi
- Department of Urology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India
| | - Gopal Gupta
- Division of Endocrinology, Central Drug Research Institute, Lucknow, UP, India
| | | | - Singh Rajender
- Division of Endocrinology, Central Drug Research Institute, Lucknow, UP, India.
| | - Kiran Singh
- Department of Molecular & Human Genetics, Banaras Hindu University, Varanasi, 221005, India.
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Smith SM, Zwart SR. Spaceflight-related ocular changes: the potential role of genetics, and the potential of B vitamins as a countermeasure. Curr Opin Clin Nutr Metab Care 2018; 21:481-488. [PMID: 30169456 DOI: 10.1097/mco.0000000000000510] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW Within the last decade, it was realized that during and after long-duration spaceflight, some astronauts experience ophthalmic abnormalities including refractive changes, optic disc edema, globe flattening, choroidal folds, and cotton wool spots. Much research has been initiated and conducted, but little evidence is available to differentiate affected crewmembers. RECENT FINDINGS The first published data to distinguish between affected and nonaffected crewmembers identified biochemical differences in affected astronauts: one-carbon pathway metabolite concentrations were higher in these individuals than in nonaffected astronauts, even before flight. These data led to findings that genetics and B-vitamin status were predictors of the incidence of the ophthalmic abnormalities. A multihit hypothesis was developed, with genetics and B-vitamin status as two of several important elements that all contribute to endothelial dysfunction and ultimately to ophthalmic changes after flight. One of these contributing factors - response to carbon dioxide exposure - was recently documented to be affected by the same one-carbon pathway genetics. SUMMARY This line of research may help identify which astronauts are at risk of these ophthalmic changes, and allow targeted treatment. This research may have implications for clinical populations, including patients with polycystic ovary syndrome, that have similar biochemical, endocrine, and genetic characteristics, and it may shed light on why links between cardiovascular disease and the metabolites homocysteine and folate have been elusive and confounded.
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Affiliation(s)
- Scott M Smith
- NASA Lyndon B. Johnson Space Center, Houston, Texas, USA
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12
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Chen Y, Fang SY. Potential genetic polymorphisms predicting polycystic ovary syndrome. Endocr Connect 2018; 7:R187-R195. [PMID: 29622662 PMCID: PMC5937197 DOI: 10.1530/ec-18-0121] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 04/05/2018] [Indexed: 01/28/2023]
Abstract
Polycystic ovary syndrome (PCOS) is a heterogenous endocrine disorder with typical symptoms of oligomenorrhoea, hyperandrogenism, hirsutism, obesity, insulin resistance and increased risk of type 2 diabetes mellitus. Extensive evidence indicates that PCOS is a genetic disease and numerous biochemical pathways have been linked with its pathogenesis. A number of genes from these pathways have been investigated, which include those involved with steroid hormone biosynthesis and metabolism, action of gonadotropin and gonadal hormones, folliculogenesis, obesity and energy regulation, insulin secretion and action and many others. In this review, we summarize the historical and recent findings in genetic polymorphisms of PCOS from the relevant publications and outline some genetic polymorphisms that are potentially associated with the risk of PCOS. This information could uncover candidate genes associating with PCOS, which will be valuable for the development of novel diagnostic and treatment platforms for PCOS patients.
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Affiliation(s)
- Yao Chen
- Hangzhou Fuyang Women and Children HospitalHangzhou, China
| | - Shu-Ying Fang
- Hangzhou Fuyang Women and Children HospitalHangzhou, China
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Wang L, Xu W, Wang C, Tang M, Zhou Y. Methylenetetrahydrofolate reductase C677T polymorphism and the risks of polycystic ovary syndrome: an updated meta-analysis of 14 studies. Oncotarget 2017; 8:59509-59517. [PMID: 28938654 PMCID: PMC5601750 DOI: 10.18632/oncotarget.18472] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 06/01/2017] [Indexed: 12/18/2022] Open
Abstract
Some studies have reported an association between the Methylenetetrahydrofolate reductase (MTHFR) C667T genetic variant and risk of polycystic ovary syndrome (PCOS), although the results remain controversial. A systematic search was conducted on PubMed, Web of Science, EMBASE, Ovid, Chinese National Knowledge Databases and WanFang databases with relevant keywords. Fourteen studies of sixteen distinct populations involving 1478 PCOS cases and used to conduct a meta-analysis. The T allele was not significantly associated with increased risk of PCOS [OR: 1.08; 95% CI: 0.96–1.21]. In the stratified analysis by ethnicity, the T allele significantly increases risks for the Asian [OR = 1.31; 95% CI: 1.09–1.58] population. No significant associations were detected for the Middle Eastern population [OR = 1.26; 95% CI: 0.96–1.67] and the T allele was found to be protective in the Caucasian population [OR = 0.82; 95% CI: 0.68–0.99]. In conclusion, this meta-analysis suggests that MTHFR C667T variant can increase, decrease, or have no effect on the risks of PCOS depending on the ethnicity.
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Affiliation(s)
- Lihong Wang
- From the Zhangjiagang Hospital of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, People's Republic of China
| | - Wenting Xu
- From the Zhangjiagang Hospital of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, People's Republic of China
| | - Caihong Wang
- From the Zhangjiagang Hospital of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, People's Republic of China
| | - Mengyu Tang
- Zhangjiagang, The First Clinical College, Nanjing University of Chinese Medicine, Nanjing, People's Republic of China
| | - Yujia Zhou
- Zhangjiagang, The First Clinical College, Nanjing University of Chinese Medicine, Nanjing, People's Republic of China
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