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Martínez Duncker Rebolledo E, Chan D, Christensen KE, Reagan AM, Howell GR, Rozen R, Trasler J. Sperm DNA methylation defects in a new mouse model of the 5,10-methylenetetrahydrofolate reductase 677C>T variant and correction with moderate dose folic acid supplementation. Mol Hum Reprod 2024; 30:gaae008. [PMID: 38366926 PMCID: PMC10980591 DOI: 10.1093/molehr/gaae008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 01/30/2024] [Indexed: 02/19/2024] Open
Abstract
5,10-Methylenetetrahydrofolate reductase (MTHFR) is an enzyme that plays a key role in providing methyl groups for DNA methylation, including during spermatogenesis. A common genetic variant in humans (MTHFR 677C>T) results in reduced enzyme activity and has been linked to various disorders, including male infertility. A new animal model has been created by reproducing the human equivalent of the polymorphism in mice using CRISPR/Cas9. Biochemical parameters in the Mthfr 677TT mice recapitulate alterations found in MTHFR 677TT men. Our aims were to characterize the sperm DNA methylome of the Mthfr 677CC and TT mice on a control diet (2 mg folic acid/kg diet) and assess the effects of folic acid supplementation (10 mg/kg diet) on the sperm DNA methylome. Body and reproductive organ weights, testicular sperm counts, and histology were examined. DNA methylation in sperm was assessed using bisulfite pyrosequencing and whole-genome bisulfite sequencing (WGBS). Reproductive parameters and locus-specific imprinted gene methylation were unaffected by genotype or diet. Using WGBS, sperm from 677TT mice had 360 differentially methylated tiles as compared to 677CC mice, predominantly hypomethylation (60% of tiles). Folic acid supplementation mostly caused hypermethylation in sperm of males of both genotypes and was found to partially correct the DNA methylation alterations in sperm associated with the TT genotype. The new mouse model will be useful in understanding the role of MTHFR deficiency in male fertility and in designing folate supplementation regimens for the clinic.
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Affiliation(s)
- Edgar Martínez Duncker Rebolledo
- Child Health and Human Development Program, Research Institute of the McGill University Health Centre, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Donovan Chan
- Child Health and Human Development Program, Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Karen E Christensen
- Child Health and Human Development Program, Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | | | - Gareth R Howell
- The Jackson Laboratory, Bar Harbor, ME, USA
- Graduate School of Biomedical Sciences, Tufts University School of Medicine, Boston, MA, USA
- Graduate School of Biomedical Sciences and Engineering, University of Maine, Orono, ME, USA
| | - Rima Rozen
- Child Health and Human Development Program, Research Institute of the McGill University Health Centre, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
- Department of Pediatrics, McGill University, Montreal, QC, Canada
| | - Jacquetta Trasler
- Child Health and Human Development Program, Research Institute of the McGill University Health Centre, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
- Department of Pediatrics, McGill University, Montreal, QC, Canada
- Department of Pharmacology & Therapeutics, Montreal, QC, Canada
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Obeid R, Warnke I, Wittke A, Bendik I, Troesch B, Schoop R, Hecht C, Demmelmair J, Koletzko B. Infant blood concentrations of folate markers and catabolites are modified by 5,10-methylenetetrahydrofolate reductase C677T genotype and dietary folate source. Am J Clin Nutr 2023; 117:509-517. [PMID: 36872017 DOI: 10.1016/j.ajcnut.2022.09.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 09/05/2022] [Accepted: 09/08/2022] [Indexed: 03/06/2023] Open
Abstract
BACKGROUND Folate intake and polymorphisms in the methylenetetrahydrofolate reductase (MTHFR) gene may affect folate metabolism in infants. OBJECTIVES We investigated the association between infant's MTHFR C677T genotype, the dietary folate source, and concentrations of folate markers in the blood. METHODS We studied 110 breastfed infants (reference) and 182 infants who were randomly assigned to receive infant formulas enriched with either 78 μg folic acid or 81 μg (6S)-5-methyltetrahydrofolate (5-MTHF) per 100 g milk powder for 12 wk. The blood samples were available at the ages of <1 mo (baseline) and 16 wk. MTHFR genotype and concentrations of folate markers and catabolites [i.e., para-aminobenzoylglutamate (pABG)] were analyzed. RESULTS At baseline, carriers of the TT genotype (vs. CC) had lower mean (SD) concentrations (all in nmol/L) of red blood cell (RBC) folate [1194 (507) vs. 1440 (521), P = 0.033) and plasma pABG [5.7 (4.9) vs. 12.5 (8.1), P < 0.001] but higher plasma 5-MTHF [33.9 (16.8) vs. 24.0 (12.6), P < 0.001]. Irrespective of the genotype, infant formula with 5-MTHF (vs. folic acid) caused a significant increase in RBC folate concentration [1278 (466) vs. 947 (552), P < 0.001]. In breastfed infants, plasma concentrations of 5-MTHF and pABG increased significantly by 7.7 (20.5) and 6.4 (10.5), respectively, from baseline to 16 wk. Infant formula that complies with the present EU legislation for folate intake increased RBC folate and plasma pABG concentrations at 16 wk (P < 0.001) than formula-fed infants. At 16 wk, plasma pABG concentrations remained ∼50% lower in carriers of the TT (vs. the CC) genotype among all feeding groups. CONCLUSIONS Folate intake from infant formula according to the present EU legislation increased RBC folate and plasma pABG concentrations in infants to a greater extent than breastfeeding, particularly in carriers of the TT genotype. However, this intake did not completely abolish the between-genotype differences in pABG. Whether these differences have any clinical relevance, however, remains unclear. This trial was registered at clinicaltrials.gov as NCT02437721.
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Affiliation(s)
- Rima Obeid
- Department of Clinical Chemistry and Laboratory Medicine, Saarland University Hospital, Homburg/Saar, Germany.
| | - Ines Warnke
- DSM Nutritional Products Ltd., Kaiseraugst, Switzerland
| | - Anja Wittke
- HiPP GmbH & Co. Vertrieb KG, Pfaffenhofen, Germany
| | - Igor Bendik
- DSM Nutritional Products Ltd., Kaiseraugst, Switzerland
| | | | | | | | - Johann Demmelmair
- Department of Paediatrics, Dr von Hauner Children's Hospital, Ludwig Maximilian University Munich, Ludwig Maximilian University Hospitals, Munich, Germany
| | - Berthold Koletzko
- Department of Paediatrics, Dr von Hauner Children's Hospital, Ludwig Maximilian University Munich, Ludwig Maximilian University Hospitals, Munich, Germany
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Zeng H, Liu Z, Zhang L, Liu N. MTHFR 677TT is associated with decreased number of embryos and cumulative live birth rate in patients undergoing GnRHa short protocol: a retrospective study. BMC Pregnancy Childbirth 2022; 22:170. [PMID: 35232413 PMCID: PMC8887009 DOI: 10.1186/s12884-022-04506-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 02/21/2022] [Indexed: 12/02/2022] Open
Abstract
Background Whether MTHFR C677T genotype affects pregnancy outcomes following assisted reproductive technology is conflicting. And the role of MTHFR C677T genotype on cumulative live birth has not been reported. This study aims to investigate the effect of MTHFR C677T genotype on cumulative live birth following in-vitro fertilization and embryo transfer (IVF-ET). Methods This is a retrospective cohort study that includes 1173 women undergoing their first IVF-ET. We retrospectively compared the reproductive outcomes among the groups stratified by MTHFR C677T genotypes (677CC, 677CT, 677TT). We performed interaction analysis to detect the factor that interacts with the MTHFR C677T genotype. Poisson regression analyses were used to evaluate the associations between MTHFR C677T genotypes with the number of transferable embryos and the number of good-quality embryos. Cox regression analysis was used to evaluate the association between MTHFR C677T genotypes with cumulative live birth. All regression analyses were adjusted with the confounding factors which may independently impact reproductive outcomes. Results There is a significant interactive effect of MTHFR 677TT genotype with GnRHa protocol on reproductive outcomes (P for interaction<0.05). MTHFR 677TT homozygous mutation was found to impact reproductive outcomes under GnRHa short protocol but not GnRHa long protocol. MTHFR 677TT is significantly associated with decreased number of transferable embryos (p-value=0.028), decreased number of good-quality embryos (p-value=0.005), and decreased cumulative live birth rate (p-value=0.024) in patients undergoing GnRHa short protocol. However, the clinical pregnancy rate, miscarriage rate and live birth rate at the first embryo transfer cycle were not significantly different between the groups under both protocols (p-values>0.05). Conclusions MTHFR 677TT genotype is associated with decreased number of transferable embryos, decreased number of good-quality embryos, and decreased cumulative live birth rate in the first complete cycle in patients undergoing GnRHa short protocol. Supplementary Information The online version contains supplementary material available at 10.1186/s12884-022-04506-4.
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Affiliation(s)
- Hong Zeng
- Department of Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.,Department of Reproductive Medicine Center, Foshan Maternal and Child Health Care Hospital, Southern Medical University, Foshan, 528000, Guangdong, China.,Department of Reproductive Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Zefu Liu
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, 510060, Guangdong, China
| | - Lei Zhang
- Department of Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Nenghui Liu
- Department of Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.
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Liu F, Du J, Nie M, Fu J, Sun J. 5,10-methylenetetrahydrofolate reductase C677T gene polymorphism and peripheral arterial disease: A meta-analysis. Vascular 2020; 29:913-919. [PMID: 33357155 DOI: 10.1177/1708538120982698] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Peripheral arterial disease is one common vascular disease most caused by atherosclerosis. As with stroke and coronary heart disease, peripheral arterial disease is one clinical type of atherosclerotic cardiovascular disease with many unmeasured environmental and genetic components. MTHFR C677T polymorphism is associated with the increased risk of ischemic stroke and coronary heart disease. MTHFR C677T polymorphism is associated with decreasing enzyme activity and increasing homocysteine levels. Meta-analysis of studies had demonstrated an association between elevated plasma homocysteine levels and peripheral arterial disease. Elevated plasma homocysteine level is closely related to MTHFR C677T polymorphism. Recent studies had clarified the relationship of MTHFR C677T polymorphism and peripheral arterial disease. So we performed a meta-analysis to investigate the association between MTHFR C677T polymorphism and peripheral arterial disease. MATERIALS AND METHODS We searched the database PubMed, Embase, and Cochrane Library for all English-language articles related to peripheral arterial disease and MTHFR C677T through 30 June 2020. Analysis results were shown by forest plot. Publication bias was estimated using funnel plot. RESULTS A total of 15 studies comprising 1929 patients with peripheral arterial disease and 2952 healthy controls were included in the meta-analysis. Significant associations between MTHFR C677T genetic polymorphism and peripheral arterial disease were found (OR = 1.31, 95% CI: 1.09-1.58, P <0.01). But there was no significant association (poor OR = 1.11, 95% CI: 0.98-1.26, P =0.11) between the T allele carrier and peripheral arterial disease. CONCLUSION Our meta-analysis suggested that MTHFR C677T genetic polymorphism TT genotype may be associated with increased peripheral arterial disease risk. But further studies with large sample sizes are needed to confirm our findings.
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Affiliation(s)
- Fanyun Liu
- Department of Vascular Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jun Du
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Menglin Nie
- Department of Vascular Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jian Fu
- Department of Vascular Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jianming Sun
- Department of Vascular Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
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Wang J, Xu L, Xia H, Li Y, Tang S. Association of MTHFR C677T gene polymorphism with metabolic syndrome in a Chinese population: a case-control study. J Int Med Res 2018; 46:2658-2669. [PMID: 29658358 PMCID: PMC6124264 DOI: 10.1177/0300060518768969] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Objective To investigate the association of the MTHFR C677T gene polymorphism with metabolic syndrome (MetS) in people in Hubei Province, China. Methods A case–control study was conducted with 651 subjects with MetS (MetS group) and 727 healthy controls (control group) at Renmin Hospital of Wuhan University between January and December 2016. The MTHFR C677T genotype was detected by the gene chip technique and clinical data were collected. Results Body mass index, waist circumference, the waist-hip-ratio, systolic and diastolic blood pressure, fasting blood glucose, fasting insulin, triglyceride, total cholesterol, low-density lipoprotein-cholesterol, and homocysteine levels, and the homeostasis model assessment of insulin resistance were higher in the MetS group than in controls. The risk of MetS was higher for the TT genotype and T allele carriers than for the CC genotype and C allele carriers. With MetS, the TT genotype increased the risk of elevated blood pressure, fasting glucose levels, and triglyceride levels. Patients with MetS and the TT genotype showed more severe abdominal obesity, dyslipidaemia, insulin resistance, elevated blood pressure, elevated fasting glucose levels, and hyperhomocysteinaemia compared with those with the CC genotype. Conclusions In this population, MTHFR C677T gene polymorphism may be a risk factor for MetS.
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Affiliation(s)
- Jin Wang
- Physical Examination Center, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Lijuan Xu
- Physical Examination Center, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Hongmiao Xia
- Physical Examination Center, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Ying Li
- Physical Examination Center, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Shiqi Tang
- Physical Examination Center, Renmin Hospital of Wuhan University, Wuhan 430060, China
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Grabowski M, Banecki B, Kadziński L, Jakóbkiewicz-Banecka J, Gabig-Cimińska M, Węgrzyn A, Węgrzyn G, Banecka-Majkutewicz Z. The model homologue of the partially defective human 5,10-methylenetetrahydrofolate reductase, considered as a risk factor for stroke due to increased homocysteine level, can be protected and reactivated by heat shock proteins. Metab Brain Dis 2016; 31:1041-5. [PMID: 27234992 PMCID: PMC5031757 DOI: 10.1007/s11011-016-9844-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 05/20/2016] [Indexed: 11/25/2022]
Abstract
The A222 V substitution in the human MTHFR gene product (5,10-methylenetetrahydrofolate reductase) is responsible for a decreased activity of this enzyme. This may cause an increased homocysteine level, considered as a risk factor for arteriosclerosis and stroke. The bacterial homologue of the human enzyme, MetF, has been found to be a useful model in genetic and biochemical studies. The similarity of Escherichia coli MetF and human MTHFR proteins is so high that particular mutations in the corresponding human gene can be reflected by the bacterial mutants. For example, the A222 V substitution in MTHFR (caused by the C667T substitution in the MTHFR gene) can be ascribed to the A117 V substitution in MetF. Here, it is reported that a temperature-sensitive MetF117 (A117 V) protein can be partially protected from a thermal inactivation by the heat shock proteins from the Hsp70/100 systems. Moreover, activity of the thermally denatured enzyme can be partially restored by the same heat shock proteins. High temperature protein G (HtpG) had no effect on MetF117 activity in both experimental systems. The presented results indicate that functions of heat shock proteins may be required for maintenance of the MetF117 function. This may have implications for the mechanisms of arteriosclerosis and stroke, especially in the light of previous findings that the A222 V MTHFR polymorphism may be a risk factor for stroke, as well as recently published results which demonstrated the increased levels of antibodies against heat shock proteins in stroke patients.
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Affiliation(s)
- Michał Grabowski
- Intercollegiate Faculty of Biotechnology, University of Gdańsk and Medical University of Gdańsk, Kładki 24, 80-822, Gdańsk, Poland
| | - Bogdan Banecki
- Intercollegiate Faculty of Biotechnology, University of Gdańsk and Medical University of Gdańsk, Kładki 24, 80-822, Gdańsk, Poland
| | - Leszek Kadziński
- Intercollegiate Faculty of Biotechnology, University of Gdańsk and Medical University of Gdańsk, Kładki 24, 80-822, Gdańsk, Poland
| | | | - Magdalena Gabig-Cimińska
- Laboratory of Molecular Biology (affiliated with the University of Gdańsk), Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Wita Stwosza 59, 80-308, Gdańsk, Poland
| | - Alicja Węgrzyn
- Laboratory of Molecular Biology (affiliated with the University of Gdańsk), Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Wita Stwosza 59, 80-308, Gdańsk, Poland
| | - Grzegorz Węgrzyn
- Department of Molecular Biology, University of Gdańsk, Wita Stwosza 59, 80-308, Gdańsk, Poland
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Karas-Kuželički N, Mencej-Bedrač S, Jazbec J, Marc J, Mlinarič-Raščan I. Risk factors for symptomatic osteonecrosis in childhood ALL: A retrospective study of a Slovenian pediatric ALL population between 1970 and 2004. Exp Ther Med 2016; 12:840-846. [PMID: 27446285 DOI: 10.3892/etm.2016.3391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 04/04/2016] [Indexed: 01/01/2023] Open
Abstract
Treatment induced non-traumatic osteonecrosis (ON) has been reported increasingly in children treated for acute lymphoblastic leukemia (ALL). Several risk factors for ON have been identified in childhood cancer patients; however, their diagnostic and prognostic power is limited and the etiology of the disease remains unclear. Therefore, a continuous effort is focused on the identification of additional ON risk factors. We performed a retrospective study of 313 childhood ALL patients to test the association between the ON occurrence in children receiving ALL therapy and common polymorphisms in potential target genes: Thiopurine S-methyltransferase (TPMT; 460G>A, 719A>G), 5,10-methylenetetrahydrofolate reductase (MTHFR; 677C>T, 1298A>C), estrogen receptor alpha 1 (ESR1; XbaI) and collagen type I, α1 (COL1A1; Sp1). In the present cohort, higher age and more recently developed treatment protocols were independent risk factors for ON. In children >14.5 years old, TPMT genotype modulated the risk of ON. Additionally, in children <12.9 years old ESR1 genotypes were also implicated in the pathogenesis of ON. Besides greater age and more recent treatment protocols, genetic factors (polymorphisms in ESR1 and TPMT genes) were suggested to be implicated in the pathogenesis of ON and could be potentially used as genetic prognostic markers for ON.
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Affiliation(s)
- Nataša Karas-Kuželički
- Department of Clinical Biochemistry, Faculty of Pharmacy, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Simona Mencej-Bedrač
- Department of Clinical Biochemistry, Faculty of Pharmacy, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Janez Jazbec
- Unit of Oncology and Hematology, University Medical Centre, University Children's Hospital, 1000 Ljubljana, Slovenia
| | - Janja Marc
- Department of Clinical Biochemistry, Faculty of Pharmacy, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Irena Mlinarič-Raščan
- Department of Clinical Biochemistry, Faculty of Pharmacy, University of Ljubljana, 1000 Ljubljana, Slovenia
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Huang J, Mei J, Jiang L, Jiang Z, Liu H, Ding F. MTHFR rs1801133 C>T polymorphism is associated with an increased risk of tetralogy of Fallot. Biomed Rep 2014; 2:172-176. [PMID: 24649091 DOI: 10.3892/br.2014.222] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 01/02/2014] [Indexed: 12/26/2022] Open
Abstract
Abnormal folate metabolism and common variants of folate-metabolizing enzymes have been described as possible risk factors for congenital heart disease (CHD). Two important folate-metabolizing enzymes involved in the folate/homocysteine metabolic pathway are 5,10-methylenetetrahydrofolate reductase (MTHFR) and methylenetetrahydrofolate dehydrogenase 1 (MTHFD1). MTHFR and MTHFD1 polymorphisms may be associated with CHD susceptibility. To evaluate the impact of MTHFR and MTHFD1 single-nucleotide polymorphisms (SNPs) on CHD susceptibility, we genotyped functional MTHFR SNPs rs1801133 C>T, rs1801131 A>C and rs2274976 G>A, and MTHFD SNPs rs2236225 C>T, rs1950902 G>A and rs1076991 A>G in a hospital-based case-control study of 173 tetralogy of Fallot (TOF) cases and 207 non-CHD controls. When MTHFR rs1801133 CC homozygote genotype was used as the reference group, the TT genotype was associated with a significantly increased risk for TOF [TT vs. CC: odds ratio (OR)=1.67; 95% confidence interval (CI): 1.01-2.75; P=0.046]. In the recessive model, when MTHFR rs1801133 CC/CT genotype was used as the reference group, the TT homozygote genotype was associated with a significantly increased risk for TOF (OR=1.81, 95% CI: 1.15-2.84; P=0.010). In conclusion, our findings suggest that MTHFR rs1801133 C>T polymorphism may play a role in susceptibility for TOF. Large-scale studies with a more rigorous study design including diverse ethnic populations are required to confirm these findings.
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Affiliation(s)
- Jianbing Huang
- Department of Cardiothoracic Surgery, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, P.R. China
| | - Ju Mei
- Department of Cardiothoracic Surgery, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, P.R. China
| | - Lianyong Jiang
- Department of Cardiothoracic Surgery, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, P.R. China
| | - Zhaolei Jiang
- Department of Cardiothoracic Surgery, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, P.R. China
| | - Hao Liu
- Department of Cardiothoracic Surgery, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, P.R. China
| | - Fangbao Ding
- Department of Cardiothoracic Surgery, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, P.R. China
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Wu YL, Ding XX, Sun YH, Yang HY, Chen J, Zhao X, Jiang YH, Lv XL, Wu ZQ. Association between MTHFR C677T polymorphism and depression: An updated meta-analysis of 26 studies. Prog Neuropsychopharmacol Biol Psychiatry 2013; 46:78-85. [PMID: 23831680 DOI: 10.1016/j.pnpbp.2013.06.015] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 06/20/2013] [Accepted: 06/21/2013] [Indexed: 11/28/2022]
Abstract
BACKGROUND Previous studies concerning the association between the 5,10-methylenetetrahydrofolate reductase (MTHFR) C677T gene polymorphism and depression have provided inconclusive findings. A meta-analysis was therefore performed to investigate a more reliable estimate. METHODS This meta-analysis recruited 26 published studies which were selected by a search of electronic databases up to January 2013, including 4992 depression cases and 17,082 controls. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to assess the association between MTHFR C677T polymorphism and depression susceptibility using random effect models. RESULTS Meta-analyses results suggested that MTHFR C677T polymorphism contributed to the increased depression risk in overall populations (for T vs. C: OR=1.19, 95%CI=1.07-1.32; for TT+CT vs. CC: OR=1.15, 95%CI=1.01-1.31; for TT vs. CC: OR=1.42, 95%CI=1.16-1.75; for TT vs. CT+CC: OR=1.38, 95%CI=1.16-1.63). Subgroup analysis by ethnicity indicated an association in Asian populations (for T vs. C: OR=1.36, 95%CI=1.11-1.66; for TT+CT vs. CC: OR=1.32, 95%CI=1.03-1.69; for TT vs. CC: OR=1.88, 95%CI=1.26-2.79; for TT vs. CT+CC: OR=1.76, 95%CI=1.30-2.38); and a marginal association in White populations (for TT vs. CT+CC: OR=1.15, 95%CI=1.01-1.31). However, the association between the MTHFR C677T polymorphism and depression was not observed in the elderly. CONCLUSION The MTHFR C677T polymorphism was associated with an increased risk of depression, especially in Asian populations. However, there was no evidence indicating a correlation in the elderly.
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Affiliation(s)
- Yi-Le Wu
- Department of Epidemiology and Statistics, School of Public Health, Anhui Medical University, No. 81 Meishan road, Hefei, Anhui 230032, China
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Abstract
In this review, we examine and compare epidemiological studies of schizophrenia and neural tube defects (NTDs). Although there is no apparent link between these 2 disparate disorders in terms of clinical manifestation or phenotypes, overlapping patterns in the variation of incidence of schizophrenia with that of NTDs indicate the existence of one or more shared etiological risk factors. Evidence in support of such a phenomenon may enhance our understanding of underlying pathological mechanisms and may guide future studies of etiology and prevention. The similarities that occur in a number of epidemiological observations for these disorders are in keeping with a hypothesis of nutritional deficiencies in utero acting as a risk factor for both schizophrenia and NTDs. Programes of periconceptual folate and multivitamin supplementation aimed to reduce the risk of NTDs are already in place in many countries. Nevertheless, evidence of additional effects of specific maternal micronutrient deficiency on risk of schizophrenia may not only increase enthusiasm for expansion of such programes but also enhance understanding of etiology of this disorder and offer the potential for targeted interventions in high-risk groups.
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Affiliation(s)
- Stanley Zammit
- Department of Psychological Medicine, Cardiff University, Heath Park, Cardiff, CF14 4XN, UK.
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