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Singh NK, Choudhary S, Rai S, Yadav AK, Singh R. Association between the MTHFR (rs1801133) gene variation and serum trace elements levels (Copper and Zinc) in individuals diagnosed with neural tube defects. Clin Chim Acta 2024; 562:119856. [PMID: 38977170 DOI: 10.1016/j.cca.2024.119856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 06/29/2024] [Accepted: 07/06/2024] [Indexed: 07/10/2024]
Abstract
BACKGROUND AND AIMS Neural tube defects (NTDs) occur when the neural tube fails to close within 28 days of human embryonic development. This results in central nervous system disorders like anencephaly, spina bifida, and encephalocele. Early diagnosis and treatment are crucial to minimize their impact on an individual's health and well-being. The present study aims to define the association between prenatal exposure to trace elements (Cu and Zn) and the single nucleotide polymorphism (SNP) of the MTHFR gene involved in folate metabolism pathways in neural tube defects in children and their mothers. MATERIAL AND METHODS A cross-sectional study involving 331 participants (90 NTD cases, 88 healthy mothers, 85 NTD children, and 68 healthy children) from antenatal check-ups in Obstetrics and Gynaecology and Pediatric Surgery for Neural Tube Defects in the Outpatient Department (OPD) and Inpatient Department (IPD). Assessed Cu and Zn concentrations and their associations. Genomic DNA was extracted, and real-time PCR was used to determine genotypes. Atomic absorption spectrophotometry measured trace elements. Statistical analyses included Chi-Square tests, odds ratios, and Mann-Whitney U tests. RESULTS Significant associations were found between MTHFR C677T genotypes and NTD risk in mothers (p = 0.0491) and children (p = 0.0297). Allelic frequency analysis indicated a T allele association with NTD risk in children (p = 0.0107). Recessive models showed significant associations in mothers (p = 0.0169) and children (p = 0.1678). Cu levels differed significantly between NTD cases and controls (p < 0.0001), with MTHFR genotypes influencing Cu levels. Zinc levels also varied significantly (p < 0.0001). CONCLUSION This study reveals complex associations between MTHFR C677T genotypes, trace element concentrations, and NTD risk in mothers and children. This targeted approach allows healthcare providers to identify at-risk pregnancies early, enabling personalised interventions like folic acid supplementation and counselling to moderate neural tube defect (NTD) risk in a future pregnancy.
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Affiliation(s)
- Nitish Kumar Singh
- Department of Anatomy, Institute of Medical Science, Banaras Hindu University, Varanasi, India
| | - Sarita Choudhary
- Department of Pediatric Surgery, Institute of Medical Science, Banaras Hindu University Varanasi, India
| | - Sangeeta Rai
- Department of Obstetrics & Gynaecology, Institute of Medical Science, Banaras Hindu University, Varanasi, India
| | - Abhay Kumar Yadav
- Department of Anatomy, Institute of Medical Science, Banaras Hindu University, Varanasi, India
| | - Royana Singh
- Department of Anatomy, Institute of Medical Science, Banaras Hindu University, Varanasi, India.
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Bragazzi NL, Del Rio D, Mayer EA, Mena P. We Are What, When, And How We Eat: The Evolutionary Impact of Dietary Shifts on Physical and Cognitive Development, Health, and Disease. Adv Nutr 2024; 15:100280. [PMID: 39067763 DOI: 10.1016/j.advnut.2024.100280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Revised: 07/07/2024] [Accepted: 07/23/2024] [Indexed: 07/30/2024] Open
Abstract
"We are what, when, and how we eat": the evolution of human dietary habits mirrors the evolution of humans themselves. Key developments in human history, such as the advent of stone tool technology, the shift to a meat-based diet, control of fire, advancements in cooking and fermentation techniques, and the domestication of plants and animals, have significantly influenced human anatomical, physiological, social, cognitive, and behavioral changes. Advancements in scientific methods, such as the analysis of microfossils like starch granules, plant-derived phytoliths, and coprolites, have yielded unprecedented insights into past diets. Nonetheless, the isolation of ancient food matrices remains analytically challenging. Future technological breakthroughs and a more comprehensive integration of paleogenomics, paleoproteomics, paleoglycomics, and paleometabolomics will enable a more nuanced understanding of early human ancestors' diets, which holds the potential to guide contemporary dietary recommendations and tackle modern health challenges, with far-reaching implications for human well-being, and ecological impact on the planet.
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Affiliation(s)
- Nicola Luigi Bragazzi
- Human Nutrition Unit (HNU), Department of Food and Drugs, University of Parma, Parma, Italy
| | - Daniele Del Rio
- Human Nutrition Unit (HNU), Department of Food and Drugs, University of Parma, Parma, Italy.
| | - Emeran A Mayer
- Goodman-Luskin Microbiome Center, David Geffen School of Medicine, University of California, Los Angeles, CA, United States; G. Oppenheimer Center for Neurobiology of Stress and Resilience, Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine, University of California, Los Angeles, CA, United States
| | - Pedro Mena
- Human Nutrition Unit (HNU), Department of Food and Drugs, University of Parma, Parma, Italy
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Shen Y, Gu Y, Tang Y, Shen H, Liu C. Geographical distribution of MTHFR C677T gene polymorphisms among the reproductive-age women in Chinese Han populations: based on migration. BMC Womens Health 2024; 24:407. [PMID: 39026333 PMCID: PMC11256367 DOI: 10.1186/s12905-024-03244-3] [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: 07/12/2023] [Accepted: 07/04/2024] [Indexed: 07/20/2024] Open
Abstract
BACKGROUND Methylenetetrahydrofolate reductase (MTHFR) is essential for the metabolism of folic acid and homocysteine. The MTHFR C677T polymorphism is associated with several disorders. Our study aims to explore the geographical distributions of the MTHFR C677T polymorphism of women in China and how migration affected the polymorphism in Suzhou. METHODS A total of 7188 women of reproductive age were recruited in Suzhou of the study. Subjects were classified according to their native places after data extraction. MTHFR C677T gene polymorphisms were detected by quantitative PCR with genomic DNA isolated from blood samples. RESULTS The frequencies of the 677T allele and 677TT genotype were higher in northern China than that in southern China and decreased in geographical gradients from north to south. The frequencies were considerably higher in the migrant population than that in the indigenous population of Suzhou. The migrant population have gradually changed the prevalence in Suzhou. CONCLUSIONS Our study suggested that the prevalence of MTHFR C677T polymorphisms among women varied across different geographical regions in Chinese Han populations. The 677T allele frequencies of the northern populations were significantly higher than those of the southern populations. The migrant population gradually changed the prevalence of the MTHFR C677T polymorphism in Suzhou.
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Affiliation(s)
- Yifen Shen
- Department of Central Lab, Suzhou Ninth People's Hospital, Ludang Road 2666, Suzhou, Jiangsu Province, 215200, China
| | - Yongchun Gu
- Department of Central Lab, Suzhou Ninth People's Hospital, Ludang Road 2666, Suzhou, Jiangsu Province, 215200, China
| | - Ying Tang
- Department of Central Lab, Suzhou Ninth People's Hospital, Ludang Road 2666, Suzhou, Jiangsu Province, 215200, China
| | - Hao Shen
- Department of Clinical Laboratory, Suzhou Ninth People's Hospital, Ludang Road 2666, Suzhou, Jiangsu Province, 215200, China.
| | - Chao Liu
- Department of Central Lab, Suzhou Ninth People's Hospital, Ludang Road 2666, Suzhou, Jiangsu Province, 215200, China.
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Jiang H, Liu Z, Townsend JH, Wang J. Effects of Methylenetetrahydrofolate Reductase ( MTHFR) Polymorphisms on Retinal Tissue Perfusion in Mild Diabetic Retinopathy Patients Receiving the Medical Food, Ocufolin ®. Clin Ophthalmol 2023; 17:1121-1127. [PMID: 37077224 PMCID: PMC10106310 DOI: 10.2147/opth.s401743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 03/27/2023] [Indexed: 04/21/2023] Open
Abstract
Purpose We evaluate the effects of methylenetetrahydrofolate reductase (MTHFR) polymorphisms on retinal tissue perfusion in patients with mild diabetic retinopathy (DR + PM) taking the medical food, Ocufolin®, for 6 months. Methods Prospective, case-controlled study. Eight early diabetic retinopathy patients with common reduced function MTHFR polymorphisms (DR+PM) and 15 normal controls (NC) were recruited. MTHFR polymorphisms were subtyped as normal, C677T, or A1298C. Best corrected visual acuity (BCVA) was evaluated. Retinal blood flow velocity (BFV) was measured using Retinal Function Imager. Retinal tissue perfusion (RTP, blood flow rate per inner retinal volume) was calculated within a 2.5 mm diameter circle centered on the fovea. The medical food is intended to address ocular ischemia with high doses of vitamin B-complexes and antioxidants, including L-methylfolate, methylcobalamin, zinc, copper, lutein, vitamins C, D, E, and n-acetylcysteine. The subjects were provided with a medical food for a period of 6 months. Results BCVA and vascular indices of DR + PM patients at baseline were initially below those of NC and improved after medical food. Compared to baseline, DR + PM patients after the medical food had significantly improved BCVA during the follow-up period (P < 0.05). In comparison, overall RTP and arteriolar BFV were significantly increased at 6 months (P < 0.05). The changes varied with MTHFR subtypes. In patients with the C677T and the C677T/A1298C compound mutations, RTP was increased at 6 months as compared to that at baseline and 4 months (P < 0.05). In patients with only the A1298C mutation, all microcirculation metrics were increased from baseline at 4 and 6 months, but with less improvement at 6 months than at 4 months (P < 0.05). Conclusion Medical food was effective in improving both visual acuity and retinal tissue perfusion in DR + PM patients. The degree of improvement of retinal microcirculation varied among MTHFR subtypes.
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Affiliation(s)
- Hong Jiang
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Neurology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Zhiping Liu
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA
- Ophthalmic Center, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, People’s Republic of China
| | - Justin H Townsend
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Jianhua Wang
- Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA
- Correspondence: Jianhua Wang, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, 1638 NW 10th Avenue, McKnight Building - Room 202A, Miami, FL, 33136, USA, Tel +1 305 482-5010, Fax +1 305 482-5012, Email
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Juvenile patients with the homozygous MTHFR C677T genotype develop ischemic stroke 5 years earlier than wild type. J Thromb Thrombolysis 2022; 54:330-338. [PMID: 35917096 DOI: 10.1007/s11239-022-02678-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/23/2022] [Indexed: 10/16/2022]
Abstract
To compare age at 1st ischaemic stroke (IS) in a cohort of juvenile (< 46 years of age) IS patients evaluated for the rs1801133 polymorphism (C → T677) of the methylene tetrahydrofolate reductase (MTHFR) gene; to identify predictors of age at IS and of type of cerebral vessel involvement, small vessel disease (SVD) vs large vessel disease (LVD) responsible for the IS; to evaluate possible associations between other clinical and laboratory variables. Retrospective cohort study on 82 MTHFR TT, 54 MTHFR TC and 34 MTHFR CC participants; data regarding age, sex, age at IS, history of dyslipidaemia, hypertension, smoking, migraine and homocysteine (HC) as well as neuroimaging were collected. Age at IS was lower in MTHFR TT than MTHFR TC and CC (35 ± 4 vs 38 ± 0 vs 40 ± 3 years, respectively, p = 0.002); plasma HC (median, interquartile range) was higher in MTHFR TT than in the other groups [16.7 (11.8, 28.6) vs 11.4 (8.2, 16.1) vs 9.8 (7.9, 1.3) respectively, p < 0.0001)] and was higher in SVD than LVD [17.4 (12.4, 32.5) vs 11.4 (8.8, 16.4) p < 0.0001]. MTHFR TT independently predicted age at IS (p = 0.0008) alongside smoking both as a categorical (p = 0.003) or continuous variable (p = 0.02), whereas HC independently predicted SVD as categorical (p = 0.01) and continuous variable (p < 0.0001). Smoking positively predicted plasma HC (p = 0.005) and negatively the activated partial thromboplastin ratio (aPTTr) (p = 0.02). Juvenile IS carriers of the MTHFR TT genotype develop their 1st occlusion on average 5 years earlier compared to the CC genotype; smoking contributes to this prematurity adversely affecting plasma HC and coagulation whereas plasma HC predicts IS secondary to SVD. Public health campaigns against smoking should highlight the prematurity of IS in the juvenile population.
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Fedota O, Sadovnychenko I, Chorna L, Roshcheniuk L, Vorontsov V, Ryzhko P, Haybonyuk I, Belyaev S, Belozorov I, Makukh H. The Effects of Polymorphisms in One-carbon Metabolism Genes on Manifestation of Ichthyosis Vulgaris. Open Access Maced J Med Sci 2021. [DOI: 10.3889/oamjms.2021.6004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND: Ichthyosis vulgaris is the most common type of Mendelian disorders of cornification, caused by loss-of-function mutations in the gene encoding epidermal protein filaggrin (FLG), namely R501X and 2282del4. FLG 2282del4 mutation in heterozygotes is incompletely penetrant. Polymorphisms in one-carbon metabolism genes could be associated with clinical manifestation of ichthyosis vulgaris.
AIM: The purpose of the present study was to analyze the effects of MTHFR, MTR and MTRR polymorphisms in patients with ichthyosis vulgaris.
METHODS: 31 patients with ichthyosis vulgaris, 7 their FLG heterozygous relatives without symptoms of disorder, and 150 healthy controls were enrolled in study. FLG null mutations —R501X (rs61816761) and 2282del4 (rs558269137) — and one-carbon metabolism gene polymorphisms — MTHFR C677T (rs1801133), MTHFR A1298C (rs1801131), MTR A2756G (rs1805087) and MTRR A66G (rs1801394) — were analyzed by a polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) assay.
RESULTS: Among patients with ichthyosis, heterozygous for FLG 2282del4 mutation, the distributions of genotypes for folate metabolism genes were: MTHFR C677T CC:CT:TT —29.4%:70.6%:0.0%; MTHFR A1298C AA:AC:CC — 52.9%:47.1%:0.0%; MTR A2756G AA:AG:GG — 70.3%:23.5%:5.9%; MTRR A66G AA:AG:GG — 23.4%:52.9%:23.5%. The frequencies of MTR 2756AA and MTRR 66GG genotypes were 1.4–1.6 times higher in affected individuals heterozygous for 2282del4 than in patients with other FLG genotypes. In affected 2282del4 heterozygotes, the frequency of MTR 2756AA genotype was 1.6 times greater than in healthy controls (p<0.01). The strongest association was found between MTHFR 677CT/MTHFR 1298AA/MTR 2756AA/MTRR 66AG genotype and ichthyosis — OR=11.23 (95% CI 2.51−50.21, p=0.002).
CONCLUSIONS: Various genotypes of one-carbon metabolism genes increase the risk of ichthyosis in heterozygotes for the FLG 2282del4 mutation (OR 2.799‑11.231). The most probable predisposing genotype is 677CT/1298AA/2756AA+AG/66AG.
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Reyes L, Godfrey D, Ming LJ, MacLean C, Gonzalez FJ, Madrigal L. The distribution in native populations from Mexico and Central America of the C677T variant in the MTHFR gene. Am J Hum Biol 2021; 33:e23567. [PMID: 33458918 DOI: 10.1002/ajhb.23567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 12/22/2020] [Accepted: 12/24/2020] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVES To explore evolutionary hypotheses for the high frequencies of a substitution in the methylenetetrahydrofolate reductase (MTHFR) gene, in Mexican and Central American Indigenous populations. MATERIALS AND METHODS We obtained allele frequencies for the C677T variant in the MTHFR gene and ecological information for 37 indigenous samples from Mexico and Central America. We calculated Hardy-Weinberg equilibrium and computed Fst statistics. We computed correlations between the samples' allele frequencies and ecological and geochemical variables. RESULTS Many of the samples have extremely high frequencies of the T allele ( q ¯ = 0.62, median = 0.66). In this region, the frequency of the T allele decreases from Southeast to Northwest and is significantly correlated with longitude, latitude, altitude, and insolation. CONCLUSIONS The native people of Central America and Mexico evolved high frequencies of an allele which has been shown to produce deleterious clinical effects including neural tube effects, cardiovascular events, and cancer. This allele has a clinal distribution in the region, perhaps associated with solar irradiation. As (Contreras-Cubas et al., 2016) noted, the traditional diet of these populations, which is high in folate, has likely mitigated the negative effect of the allele. It is of primary importance that their rights to their homeland and traditional diets be respected. It is a matter of Public Health to investigate whether this allele is a factor in the current wave of cardiovascular diseases affecting the majority population of this region, since it descends from the Native peoples and the Mediterranean population, which also has high frequencies of the allele.
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Affiliation(s)
- Lucio Reyes
- Department of Anthropology, University of South Florida, Tampa, Florida, USA
| | - David Godfrey
- Department of Anthropology, University of South Florida, Tampa, Florida, USA
| | - Li-June Ming
- Department of Chemistry, University of South Florida, Tampa, Florida, USA
| | - Caroline MacLean
- Department of Anthropology, University of South Florida, Tampa, Florida, USA
| | | | - Lorena Madrigal
- Department of Anthropology, University of South Florida, Tampa, Florida, USA
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Niforou A, Konstantinidou V, Naska A. Genetic Variants Shaping Inter-individual Differences in Response to Dietary Intakes-A Narrative Review of the Case of Vitamins. Front Nutr 2020; 7:558598. [PMID: 33335908 PMCID: PMC7736113 DOI: 10.3389/fnut.2020.558598] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Accepted: 11/03/2020] [Indexed: 12/17/2022] Open
Abstract
Recent advances in the field of nutrigenetics have provided evidence on how genetic variations can impact the individuals' response to dietary intakes. An objective and reliable assessment of dietary exposures should rely on combinations of methodologies including frequency questionnaires, short-term recalls or records, together with biological samples to evaluate markers of intake or status and to identify genetic susceptibilities. In an attempt to present current knowledge on how genetic fingerprints contribute to an individual's nutritional status, we present a review of current literature describing associations between genetic variants and levels of well-established biomarkers of vitamin status in free-living and generally healthy individuals. Based on the outcomes of candidate gene, genome-wide-association studies and meta-analyses thereof, we have identified several single nucleotide polymorphisms (SNPs) involved in the vitamins' metabolic pathways. Polymorphisms in genes encoding proteins involved in vitamin metabolism and transport are reported to have an impact on vitamin D status; while genetic variants of vitamin D receptor were most frequently associated with health outcomes. Genetic variations that can influence vitamin E status include SNPs involved in its uptake and transport, such as in SCAR-B1 gene, and in lipoprotein metabolism. Variants of the genes encoding the sodium-dependent vitamin C transport proteins are greatly associated with the body's status on vitamin C. Regarding the vitamins of the B-complex, special reference is made to the widely studied variant in the MTHFR gene. Methodological attributes of genetic studies that may limit the comparability and interpretability of the findings are also discussed. Our understanding of how genes affect our responses to nutritional triggers will enhance our capacity to evaluate dietary exposure and design personalized nutrition programs to sustain health and prevent disease.
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Affiliation(s)
- Aikaterini Niforou
- Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | | | - Androniki Naska
- Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
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Xu S, Shi Q, Li B, Han L, Xu G, Peng X, Chen H, Dai S, Ma W, Wang C, Ma J. High MTHFR promoter methylation levels in men confer protection against ischemic stroke. Bosn J Basic Med Sci 2020; 20:477-486. [PMID: 32358951 PMCID: PMC7664794 DOI: 10.17305/bjbms.2020.4636] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 04/29/2020] [Indexed: 02/05/2023] Open
Abstract
The MTHFR gene encodes methylenetetrahydrofolate reductase required for the metabolism of homocysteine (Hcy) - a previously reported independent risk factor for ischemic stroke (IS). In this study, we first aimed to clarify the association between DNA methylation levels in the MTHFR promoter and the risk of IS, followed by the analysis of potential interactions between environmental factors and DNA methylation levels that affect IS risk. We recruited 164 patients with hypertension and IS (case group) and 345 age-matched and sex-matched patients with hypertension only (control group). Demographic and clinical information was obtained using questionnaires, and blood samples were collected for biochemical analyses. Fluorescence quantitative methylation-specific PCR (qMSP) was used to detect MTHFR promoter methylation levels. A logistic regression analysis was performed to determine the relationship between environmental factors, MTHFR promoter methylation levels, and IS risk. We finally generated a receiver operating characteristic curve to determine whether MTHFR promoter methylation levels can predict IS. The mean MTHFR methylation levels in the case group (8.10 ± 6.14) were significantly lower than those in the control group (17.44 ± 3.16; p < 0.05). MTHFR promoter methylation levels were also lower in patients with plasma Hcy levels ≥15 μmol/L (10.65 ± 4.05) than in those with Hcy levels <15 μmol/L (16.74 ± 4.26, p < 0.001). Finally, we found that MTHFR hypermethylation is a protective factor for IS, particular in men (OR in men: 0.07; 95% CI: 0.02-0.16; p < 0.001). Further, sex and MTHFR promoter methylation levels exhibited a preliminary interaction effect on IS risk. These results indicate that MTHFR promoter methylation status might have diagnostic value in IS.
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Affiliation(s)
- Shan Xu
- Nanshan Center for Chronic Disease Control, Shenzhen, China
| | - Qianping Shi
- Department of Preventive Medicine, Shantou University Medical College, Shantou, Guangdong, China
| | - Bo Li
- Nanshan Center for Chronic Disease Control, Shenzhen, China
| | - Liyuan Han
- Department of Preventive Medicine, School of Medicine, Ningbo University, Ningbo, China
| | - Guodong Xu
- Medical Record Statistics Room, Ningbo Medical Center Lihuili Hospital, Ningbo, China
| | - Xiaolin Peng
- Nanshan Center for Chronic Disease Control, Shenzhen, China
| | - Hongen Chen
- Nanshan Center for Chronic Disease Control, Shenzhen, China
| | - Shuhong Dai
- Nanshan Center for Chronic Disease Control, Shenzhen, China
| | - Wancheng Ma
- Luohu Center for Chronic Disease Control, Shenzhen, China
| | - Changyi Wang
- Nanshan Center for Chronic Disease Control, Shenzhen, China
- Corresponding authors: Changyi Wang and Jianping Ma, Nanshan Center for Chronic Disease Control, 5 Huaming Road, Shenzhen, China. E-mail:
| | - Jianping Ma
- Nanshan Center for Chronic Disease Control, Shenzhen, China
- Corresponding authors: Changyi Wang and Jianping Ma, Nanshan Center for Chronic Disease Control, 5 Huaming Road, Shenzhen, China. E-mail:
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Osunkalu VO, Taiwo IA, Makwe CC, Quao RA. Methylene tetrahydrofolate reductase and methionine synthase gene polymorphisms as genetic determinants of pre-eclampsia. Pregnancy Hypertens 2020; 20:7-13. [PMID: 32120336 DOI: 10.1016/j.preghy.2020.02.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 01/29/2020] [Accepted: 02/06/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUND Pre-eclampsia (PE) is a leading cause of maternal and neonatal mortality in Africa; and has been associated with the interplay of genetic, metabolic and environmental factors. Polymorphisms of methylene tetrahydrofolate reductase (MTHFR) and methionine synthase (MTR) folate cycle genes, have been controversially associated with pre-eclampsia in studies from different human populations. OBJECTIVES To determine the distribution of MTHFR C677T and MTR A2756G polymorphisms in a Nigerian population and evaluate possible associations with the occurrence of pre-eclampsia and homocysteine metabolic derangement. MATERIALS AND METHODS This study was a hospital based study carried out in Lagos, South-western Nigeria. Two hundred pregnant women clinically diagnosed with pre-eclampsia (study group) and 200 apparently healthy non-pre-eclamptic pregnant women (control group) were recruited for the study after written informed consent. Pre-eclampsia was diagnosed based on the International Society for the Study of Hypertension in Pregnancy re-classification of 2013. MTHFR C677T and MTR A2756G polymorphisms were determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method. Statistical analyzes were performed using SPSS version 23. Hardy-Weinberg distribution were tested with χ2 test. Logistic regression model was used to evaluate the relationship of variables with pre-eclampsia. A value of p < 0.05 was considered statistically significant. RESULTS MTHFR genotype frequencies of CC, CT and TT were 59.8%; 31.2% and 9.0% in study group and 76.6%; 22.3% and 1.0% in the control group respectively. MTR A2756G genotype frequencies of AA, AG and GG genotypes were 71.9%; 20.1% and 8.0% for the study group and 81.5%; 16.4% and 2.1% for the control group. Occurrence of pre-eclampsia was significantly associated with presence of T allele of MTHFR (OR = 1.855; p < 0.05) and G allele of MTR genes (OR = 1.269; p < 0.05), Homozygosity of TG haplotype significantly increased the occurrence of pre-eclampsia among Nigerian women (OR = 2.252; p < 0.05). Population attributable risk fraction percent for the T and G alleles were 16.4% and 11.5% respectively. Mean plasma Hcy level was not, however, significantly affected by MTHFR/MTR haplotypes (F = 1.54; p = 0.157). CONCLUSION MTHFR C677T and MTR A2756G polymorphisms were associated with pre-eclampsia in a population of pregnant women in Lagos, Nigeria.
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Affiliation(s)
- V O Osunkalu
- Department of Haematology and Blood Transfusion, College of Medicine, University of Lagos, Nigeria.
| | - I A Taiwo
- Department of Cell Biology and Genetics, University of Lagos, Nigeria
| | - C C Makwe
- Department of Obstetrics and Gynaecology, College of Medicine, University of Lagos, Nigeria
| | - R A Quao
- Department of Community Health and Primary Care, College of Medicine, University of Lagos, Nigeria
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Zhilyaeva TV, Sergeeva AV, Blagonravova AS, Mazo GE, Kibitov AO. One-Carbon Metabolism Disorders in Schizophrenia: Genetic and Therapeutic Aspects. NEUROCHEM J+ 2019. [DOI: 10.1134/s1819712419020156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Genetic polymorphisms of key enzymes in folate metabolism affect the efficacy of folate therapy in patients with hyperhomocysteinaemia. Br J Nutr 2019; 119:887-895. [PMID: 29644956 DOI: 10.1017/s0007114518000508] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The aim of this study is to analyse the efficacy rate of folate for the treatment of hyperhomocysteinaemia (HHcy) and to explore how folate metabolism-related gene polymorphisms change its efficacy. This study also explored the effects of gene-gene and gene-environment interactions on the efficacy of folate. A prospective cohort study enrolling HHcy patients was performed. The subjects were treated with oral folate (5 mg/d) for 90 d. We analysed the efficacy rate of folate for the treatment of HHcy by measuring homocysteine (Hcy) levels after treatment. Unconditioned logistic regression was conducted to analyse the association between SNP and the efficacy of folic acid therapy for HHcy. The efficacy rate of folate therapy for HHcy was 56·41 %. The MTHFR rs1801133 CT genotype, TT genotype and T allele; the MTHFR rs1801131 AC genotype, CC genotype and C allele; the MTRR rs1801394 GA genotype, GG genotype and G allele; and the MTRR rs162036 AG genotype and AG+GG genotypes were associated with the efficacy of folic acid therapy for HHcy (P<0·05). No association was seen between other SNP and the efficacy of folic acid. The optimal model of gene-gene interactions was a two-factor interaction model including rs1801133 and rs1801394. The optimal model of gene-environment interaction was a three-factor interaction model including history of hypertension, history of CHD and rs1801133. Folate supplementation can effectively decrease Hcy level. However, almost half of HHcy patients failed to reach the normal range. The efficacy of folate therapy may be genetically regulated.
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Mathias MG, Coelho‐Landell CDA, Scott‐Boyer M, Lacroix S, Morine MJ, Salomão RG, Toffano RBD, Almada MORDV, Camarneiro JM, Hillesheim E, de Barros TT, Camelo‐Junior JS, Campos Giménez E, Redeuil K, Goyon A, Bertschy E, Lévêques A, Oberson J, Giménez C, Carayol J, Kussmann M, Descombes P, Métairon S, Draper CF, Conus N, Mottaz SC, Corsini GZ, Myoshi SKB, Muniz MM, Hernandes LC, Venâncio VP, Antunes LMG, da Silva RQ, Laurito TF, Rossi IR, Ricci R, Jorge JR, Fagá ML, Quinhoneiro DCG, Reche MC, Silva PVS, Falquetti LL, da Cunha THA, Deminice TMM, Tambellini TH, de Souza GCA, de Oliveira MM, Nogueira‐Pileggi V, Matsumoto MT, Priami C, Kaput J, Monteiro JP. Clinical and Vitamin Response to a Short-Term Multi-Micronutrient Intervention in Brazilian Children and Teens: From Population Data to Interindividual Responses. Mol Nutr Food Res 2018; 62:e1700613. [PMID: 29368422 PMCID: PMC6120145 DOI: 10.1002/mnfr.201700613] [Citation(s) in RCA: 25] [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: 07/18/2017] [Revised: 12/02/2017] [Indexed: 12/11/2022]
Abstract
SCOPE Micronutrients are in small amounts in foods, act in concert, and require variable amounts of time to see changes in health and risk for disease. These first principles are incorporated into an intervention study designed to develop new experimental strategies for setting target recommendations for food bioactives for populations and individuals. METHODS AND RESULTS A 6-week multivitamin/mineral intervention is conducted in 9-13 year olds. Participants (136) are (i) their own control (n-of-1); (ii) monitored for compliance; (iii) measured for 36 circulating vitamin forms, 30 clinical, anthropometric, and food intake parameters at baseline, post intervention, and following a 6-week washout; and (iv) had their ancestry accounted for as modifier of vitamin baseline or response. The same intervention is repeated the following year (135 participants). Most vitamins respond positively and many clinical parameters change in directions consistent with improved metabolic health to the intervention. Baseline levels of any metabolite predict its own response to the intervention. Elastic net penalized regression models are identified, and significantly predict response to intervention on the basis of multiple vitamin/clinical baseline measures. CONCLUSIONS The study design, computational methods, and results are a step toward developing recommendations for optimizing vitamin levels and health parameters for individuals.
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Affiliation(s)
| | | | - Marie‐Pier Scott‐Boyer
- The Microsoft Research, Centre for Computational and Systems Biology (COSBI)University of TrentoRoveretoItaly
| | - Sébastien Lacroix
- The Microsoft Research, Centre for Computational and Systems Biology (COSBI)University of TrentoRoveretoItaly
| | - Melissa J. Morine
- The Microsoft Research, Centre for Computational and Systems Biology (COSBI)University of TrentoRoveretoItaly
- Department of MathematicsUniversity of TrentoTrentoItaly
| | - Roberta Garcia Salomão
- Department of PediatricsFaculty of MedicineNutrition and MetabolismUniversity of São Paulo
| | | | | | | | - Elaine Hillesheim
- Department of PediatricsFaculty of MedicineNutrition and MetabolismUniversity of São Paulo
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Nelly Conus
- Nestlé Institute of Health SciencesLausanneSwitzerland
| | | | | | | | - Mariana Mendes Muniz
- Department of PediatricsFaculty of MedicineNutrition and MetabolismUniversity of São Paulo
| | | | - Vinícius Paula Venâncio
- School of Pharmaceutical Science of Ribeirao PretoUniversity of São PauloRibeirao PretoBrazil
| | | | | | - Taís Fontellas Laurito
- Department of PediatricsFaculty of MedicineNutrition and MetabolismUniversity of São Paulo
| | - Isabela Ribeiro Rossi
- Department of PediatricsFaculty of MedicineNutrition and MetabolismUniversity of São Paulo
| | - Raquel Ricci
- Department of PediatricsFaculty of MedicineNutrition and MetabolismUniversity of São Paulo
| | - Jéssica Ré Jorge
- Department of PediatricsFaculty of MedicineNutrition and MetabolismUniversity of São Paulo
| | - Mayara Leite Fagá
- Department of PediatricsFaculty of MedicineNutrition and MetabolismUniversity of São Paulo
| | | | | | | | - Letícia Lima Falquetti
- Department of PediatricsFaculty of MedicineNutrition and MetabolismUniversity of São Paulo
| | | | | | | | | | | | - Vicky Nogueira‐Pileggi
- Department of PediatricsFaculty of MedicineNutrition and MetabolismUniversity of São Paulo
| | | | - Corrado Priami
- The Microsoft Research, Centre for Computational and Systems Biology (COSBI)University of TrentoRoveretoItaly
- Department of MathematicsUniversity of TrentoTrentoItaly
| | - Jim Kaput
- Nestlé Institute of Health SciencesLausanneSwitzerland
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Abstract
In view of well-documented association of hyperhomocysteinaemia with a wide spectrum of diseases and higher incidence of vitamin deficiencies in Indians, we proposed a mathematical model to forecast the role of demographic and genetic variables in influencing homocysteinemetabolism and investigated the influence of life style modulations in controlling homocysteine levels. Total plasma homocysteine levels were measured in fasting samples using reverse phase HPLC. Multiple linear regression (MLR) and neuro-fuzzy models were developed. The MLR model explained 64% variability in homocysteine, while the neurofuzzy model showed higher accuracy in predicting homocysteine with a mean absolute error of 0.00002 μmol/L. Methylene tetrahydrofolate reductase (MTHFR) C677T, 5-methyltetrahydrofolate homocysteine methyltransferase (MTR) A2756G and 5- methyltetrahydrofolate homocysteine methyltransferase reductase (MTRR) A66G were shown to be positively associatiated with homocysteine, while nonvegetarian diet, serine hydroxymethyltransferase 1 (SHMT1) C1420T and TYMS 5'-UTR 28 bp tandem repeat exhibited negative association with homocysteine. The protective role of SHMT1 C1420T was attributed to more H-bonding interactions in the mutant modelled compared to the wild type, as shown through in silico analysis. To conclude, polymorphisms in genes regulating remethylation of homocysteine strongly influence homocysteine levels. The restoration of one-carbon homeostasis by SHMT1 C1420T or increased flux of folate towards remethylation due to TYMS 5'-UTR 28 bp tandem repeat or nonvegetarian diet can lower homocysteine levels.
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Tailoring Nutritional Advice for Mexicans Based on Prevalence Profiles of Diet-Related Adaptive Gene Polymorphisms. J Pers Med 2017; 7:jpm7040016. [PMID: 29125573 PMCID: PMC5748628 DOI: 10.3390/jpm7040016] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 11/06/2017] [Accepted: 11/08/2017] [Indexed: 12/18/2022] Open
Abstract
Diet-related adaptive gene (DRAG) polymorphisms identified in specific populations are associated with chronic disorders in carriers of the adaptive alleles due to changes in dietary and lifestyle patterns in recent times. Mexico’s population is comprised of Amerindians (AM) and Mestizos who have variable AM, European (EUR) and African genetic ancestry and an increased risk of nutrition-related chronic diseases. Nutritional advice based on the Mexican genome and the traditional food culture is needed to develop preventive and therapeutic strategies. Therefore, we aimed to provide a prevalence profile of several DRAG polymorphisms in the Mexican population, including Central West (CW) Mexico subpopulations. Geographic heat maps were built using ArcGIS10 (Esri, Redlands, CA, USA) software, based on the published data of the MTHFR C677T (rs1801133), ABCA1 Arg230Cys (rs9282541), APOE T388C (rs429358)/C526T (rs7412), LCT C-13910T (rs4988235) polymorphisms and AMY1 copy number variation (CNV). Also, new data obtained by allelic discrimination-real-time polymerase chain reaction (RT-PCR) assays for the MTHFR, ABCA1, and APOE polymorphisms as well as the AMY1 CNV in the CW Mexico subpopulations with different proportions of AM and EUR ancestry were included. In the CW region, the highest frequency of the MTHFR 677T, ABCA1 230C and APOE ε4 adaptive alleles was observed in the AM groups, followed by Mestizos with intermediate AM ancestry. The LCT-13910T allele frequency was highest in Mestizos-EUR but extremely low in AM, while the AMY1 diploid copy number was 6.82 ± 3.3 copies. Overall, the heat maps showed a heterogeneous distribution of the DRAG polymorphisms, in which the AM groups revealed the highest frequencies of the adaptive alleles followed by Mestizos. Given these genetic differences, genome-based nutritional advice should be tailored in a regionalized and individualized manner according to the available foods and Mexican traditional food culture that may lead to a healthier dietary pattern.
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Fricke-Galindo I, Jung-Cook H, LLerena A, López-López M. Interethnic variability of pharmacogenetic biomarkers in Mexican healthy volunteers: a report from the RIBEF (Ibero-American Network of Pharmacogenetics and Pharmacogenomics). Drug Metab Pers Ther 2017; 31:61-81. [PMID: 26812836 DOI: 10.1515/dmpt-2015-0030] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 12/04/2015] [Indexed: 01/01/2023]
Abstract
Mexico presents a complex population diversity integrated by Mexican indigenous (MI) (7% of Mexico's population) and Mexican mestizos (MMs). This composition highlights the importance of pharmacogenetic studies in Mexican populations. The aims of this study were to analyze the reported frequencies of the most relevant pharmacogenetic biomarkers and metabolic phenotypes in healthy volunteers from Mexican populations and to assess its interethnic variability across MI and MM populations. After a literature search in PubMed, and according to previously defined inclusion criteria, 63 pharmacogenetic studies performed in Mexican healthy volunteers up to date were selected. These reports comprised 56,292 healthy volunteers (71.58% MM). Allele frequencies in 31 pharmacogenetic biomarkers, from 121 searched, are described. Nine of these biomarkers presented variation within MM and MI groups. The frequencies of CYP2D6*3, *4, *5, *10, *17, *35 and *41 alleles in the MM group were different from those reported in the MI group. CYP2C9*2 and *3 alleles were more frequent in MM than in MI populations (χ2 test, p<0.05). CYP2C19*3 allele was not found in the MM or MI populations reported. For UGT1A1*28, only one study was found. HLA-A*31:01 and HLA-B*15:02 were present in some MM and MI populations. Poor metabolizers for CYP2D6 and CYP2C9 were more frequent in MM than in MI groups (χ2 test, p<0.05). Only 26% of the relevant pharmacogenetic biomarkers searched have been studied in Mexican healthy volunteers; therefore, further studies are warranted. The frequency variation of biomarkers in MM and MI populations could be important for the clinical implementation of pharmacogenetics in Mexico.
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17
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Hiraoka M, Kagawa Y. Genetic polymorphisms and folate status. Congenit Anom (Kyoto) 2017; 57:142-149. [PMID: 28598562 PMCID: PMC5601299 DOI: 10.1111/cga.12232] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 05/23/2017] [Accepted: 06/04/2017] [Indexed: 01/05/2023]
Abstract
Moderate hyperhomocysteinemia-induced low folate status is an independent risk factor for cardiovascular disease, dementia, and depression. Folate is an essential cofactor in the one-carbon metabolism pathway and is necessary in amino acid metabolism, purine and thymidylate synthesis, and DNA methylation. In the folate cycle and homocysteine metabolism, folate, vitamin B12, vitamin B6, and vitamin B2 are important cofactors. Many enzymes are involved in folate transport and uptake, the folate pathway, and homocysteine (Hcy) metabolism, and various polymorphisms have been documented in these enzymes. Serum folate and total Hcy (tHcy) levels are influenced by folate intake and genetic polymorphisms in 5,10-methylenetertahydrofolate reductase (MTHFR) such as C677T. The prevalence of the MTHFR 677TT genotype varies across ethnic groups and regions, with a frequency of approximately 15% in Japanese populations. Individuals with the TT genotype have significantly higher tHcy levels and lower folate levels in serum than those with the CT and TT genotypes. However, administration of folic acid has been shown to eliminate these differences. Moreover, data have suggested that interventions based on genotype may be effective for motivating individuals to change their lifestyle and improve their nutrition status. Accordingly, in this review, we discuss the effects of MTHFR C677T polymorphisms on serum tHcy and folate levels with folic acid intervention and evaluate approaches for overcoming folic acid deficiency and related symptoms.
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Affiliation(s)
- Mami Hiraoka
- College of Nursing and Nutrition, School of NutritionShukutoku UniversityChiba CityChibaJapan
| | - Yasuo Kagawa
- Department of Medical ChemistryKagawa Nutrition UniversitySakado CitySaitamaJapan
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Yang B, Fan S, Zhi X, Xia R, Wang Y, Zheng Q, Sun G. Geographical and ethnic distribution of MTHFR gene polymorphisms and their associations with diseases among Chinese population. Clin Genet 2017; 92:243-258. [PMID: 27888505 DOI: 10.1111/cge.12929] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Revised: 11/16/2016] [Accepted: 11/22/2016] [Indexed: 12/17/2022]
Abstract
Numerous studies have investigated the distribution of methylenetetrahydrofolate reductase (MTHFR) C677T and A1298C polymorphisms and their associations with diseases in China. In this study we conducted a systematic review and meta-analysis of these studies (715 eligible studies in total).Results revealed that the frequencies of the MTHFR C677T and A1298C polymorphisms varied markedly in different areas and ethnicities, and even showed geographical gradients. The MTHFR C677T polymorphism was significantly associated with 42 clinical disorders (p < 0.05), mostly relating to the diseases of circulatory system, birth defects and cancers. The association of the A1298C polymorphism with three diseases (coronary heart disease, breast cancer and neural tube defects fathers) was statistically significant (p < 0.05). However, according to the Venice criteria, only the associations of the C677T polymorphism with breast and ovarian cancers were assessed as having strong epidemiological credibility. This is the first study to provide a comprehensive assessment of the current status and gaps in genetic epidemiological study of the two polymorphisms in China, and its findings may be useful for medical and public health practices. Future studies are warranted to focus on the interactions of MTHFR genes with environmental exposure and with other genes, and to improve their methodological quality and reporting of findings.
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Affiliation(s)
- B Yang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Preventive Medicine, School of Public Health, Sun Yat-Sen University, Guangzhou, China.,Environment and Non-Communicable Disease Research Center, School of Public Health, China Medical University, Shenyang, China
| | - S Fan
- Environment and Non-Communicable Disease Research Center, School of Public Health, China Medical University, Shenyang, China
| | - X Zhi
- Environment and Non-Communicable Disease Research Center, School of Public Health, China Medical University, Shenyang, China
| | - R Xia
- Shanghai Institute of Planned Parenthood Research, School of Medicine, Fudan University, Shanghai, China
| | - Y Wang
- Division of Molecular Preventive Medicine, Shanghai Institute of Targeted Therapy and Molecular Medicine, Shanghai, China
| | - Q Zheng
- Environment and Non-Communicable Disease Research Center, School of Public Health, China Medical University, Shenyang, China
| | - G Sun
- Environment and Non-Communicable Disease Research Center, School of Public Health, China Medical University, Shenyang, China
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Karban A, Feldman T, Waterman M, Leiba R, Efrati E. The association of the MTHFR C677T polymorphism with inflammatory bowel diseases in the Israeli Jewish population: An example of genetic heterogeneity. Medicine (Baltimore) 2016; 95:e5611. [PMID: 28002332 PMCID: PMC5181816 DOI: 10.1097/md.0000000000005611] [Citation(s) in RCA: 4] [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: 01/21/2023] Open
Abstract
MTHFR C677T is a common gene polymorphism that has been shown to be associated with hyperhomocysteinemia. Studies on the role of MTHFR in inflammatory bowel diseases (IBD) have yielded conflicting results, perhaps due in part to genetic heterogeneity. The prevalence of the MTHFR C677T variant allele varies according to Jewish subpopulations: Ashkenazi vs non-Ashkenazi. The aim of this study was to examine the association between MTHFR C677T genotype and IBD in the different Jewish populations.DNA samples were assessed for the presence of the MTHFR C677T variant allele in 445 Jewish Israeli IBD patients: 338 with Crohn's disease [CD] (214 Ashkenazi and 124 non-Ashkenazi Jews) and 107 with ulcerative colitis [UC] (73 Ashkenazi and 34 non-Ashkenazi Jews), and in 347 healthy controls: 173 Ashkenazi and 174 Non-Ashkenazi Jews. Possible genotype-phenotype associations were investigated.We showed a significantly higher frequency of MTHFR 677T variant genotypes in non-Ashkenazi CD patients: Odds ratio of 1.86 for heterozygotes (CT) and 2.89 for homozygotes (TT) compared to non-Ashkenazi healthy controls. No significant association was found for UC in non-Ashkenazi patients or for CD or UC in Ashkenazi patients.Our findings suggest that the MTHFR 677T variant may contribute to the risk of CD in non-Ashkenazi but not Ashkenazi Jews. This may result from genetic heterogeneity and highlights the complexity of the genetic etiology of IBD.
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Affiliation(s)
- Amir Karban
- Department of Internal Medicine C, Rambam Health Care Campus
- Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology
| | - Tzah Feldman
- Department of Internal Medicine C, Rambam Health Care Campus
- Laboratory of Toxicology, Pharmacology and Pharmacogenetics, Israel Poison Information Center, Rambam Health Care Campus
| | - Matti Waterman
- Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology
- Department of Gastroenterology, Rambam Health Care Campus
| | - Ronit Leiba
- Epidemiologic Unit, Rambam Health Care Campus, Haifa, Israel
| | - Edna Efrati
- Laboratory of Toxicology, Pharmacology and Pharmacogenetics, Israel Poison Information Center, Rambam Health Care Campus
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Contreras-Cubas C, Sánchez-Hernández BE, García-Ortiz H, Martínez-Hernández A, Barajas-Olmos F, Cid M, Mendoza-Caamal EC, Centeno-Cruz F, Ortiz-Cruz G, Jiménez-López JC, Córdova EJ, Salas-Bautista EG, Saldaña-Alvarez Y, Fernández-López JC, Mutchinick OM, Orozco L. Heterogenous Distribution of MTHFR Gene Variants among Mestizos and Diverse Amerindian Groups from Mexico. PLoS One 2016; 11:e0163248. [PMID: 27649570 PMCID: PMC5029802 DOI: 10.1371/journal.pone.0163248] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 09/05/2016] [Indexed: 11/18/2022] Open
Abstract
Methylenetetrahydrofolate reductase (MTHFR) is a key enzyme in folate metabolism. Folate deficiency has been related to several conditions, including neural tube defects (NTDs) and cardiovascular diseases. Hence, MTHFR genetic variants have been studied worldwide, particularly the C677T and A1298C. We genotyped the C677T and A1298C MTHFR polymorphisms in Mexican Amerindians (MAs), from the largest sample included in a genetic study (n = 2026, from 62 ethnic groups), and in a geographically-matched Mexican Mestizo population (MEZ, n = 638). The 677T allele was most frequent in Mexican individuals, particularly in MAs. The frequency of this allele in both MAs and MEZs was clearly enriched in the South region of the country, followed by the Central East and South East regions. In contrast, the frequency of the 1298C risk allele in Mexicans was one of the lowest in the world. Both in MAs and MEZs the variants 677T and 1298C displayed opposite allele frequency gradients from southern to northern Mexico. Our findings suggest that in Mestizos the 677T allele was derived from Amerindians while the 1298C allele was a European contribution. Some subgroups showed an allele frequency distribution that highlighted their genetic diversity. Notably, the distribution of the frequency of the 677T allele was consistent with that of the high incidence of NTDs reported in MEZ.
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Affiliation(s)
- Cecilia Contreras-Cubas
- Inmunogenomics and Metabolic Disease Laboratory, Instituto Nacional de Medicina Genómica, SS, Mexico City, Mexico
| | - Beatríz E. Sánchez-Hernández
- Genetic Department, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, SS, Mexico City, Mexico
| | - Humberto García-Ortiz
- Inmunogenomics and Metabolic Disease Laboratory, Instituto Nacional de Medicina Genómica, SS, Mexico City, Mexico
| | - Angélica Martínez-Hernández
- Inmunogenomics and Metabolic Disease Laboratory, Instituto Nacional de Medicina Genómica, SS, Mexico City, Mexico
| | - Francisco Barajas-Olmos
- Inmunogenomics and Metabolic Disease Laboratory, Instituto Nacional de Medicina Genómica, SS, Mexico City, Mexico
| | - Miguel Cid
- Inmunogenomics and Metabolic Disease Laboratory, Instituto Nacional de Medicina Genómica, SS, Mexico City, Mexico
| | - Elvia C. Mendoza-Caamal
- Inmunogenomics and Metabolic Disease Laboratory, Instituto Nacional de Medicina Genómica, SS, Mexico City, Mexico
| | - Federico Centeno-Cruz
- Inmunogenomics and Metabolic Disease Laboratory, Instituto Nacional de Medicina Genómica, SS, Mexico City, Mexico
| | - Gabriela Ortiz-Cruz
- Genetic Department, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, SS, Mexico City, Mexico
| | - José Concepción Jiménez-López
- Physic Anthropology Direction, Instituto Nacional de Antropología e Historia, Museo Nacional de Antropología, Mexico City, Mexico
| | - Emilio J. Córdova
- Inmunogenomics and Metabolic Disease Laboratory, Instituto Nacional de Medicina Genómica, SS, Mexico City, Mexico
| | - Eva Gabriela Salas-Bautista
- Physic Anthropology Direction, Instituto Nacional de Antropología e Historia, Museo Nacional de Antropología, Mexico City, Mexico
| | - Yolanda Saldaña-Alvarez
- Inmunogenomics and Metabolic Disease Laboratory, Instituto Nacional de Medicina Genómica, SS, Mexico City, Mexico
| | | | - Osvaldo M. Mutchinick
- Genetic Department, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, SS, Mexico City, Mexico
| | - Lorena Orozco
- Inmunogenomics and Metabolic Disease Laboratory, Instituto Nacional de Medicina Genómica, SS, Mexico City, Mexico
- * E-mail:
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Restrepo LF, Giraldo R, Londoño J, Pinzón C, Cortes A, Ballesteros G, Santos AM. Farmacogenética del metotrexato en artritis reumatoide. Revisión sistemática. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.rcreu.2016.02.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Field MS, Kamynina E, Watkins D, Rosenblatt DS, Stover PJ. New insights into the metabolic and nutritional determinants of severe combined immunodeficiency. Rare Dis 2015; 3:e1112479. [PMID: 27123375 PMCID: PMC4817835 DOI: 10.1080/21675511.2015.1112479] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 09/20/2015] [Accepted: 10/19/2015] [Indexed: 11/07/2022] Open
Abstract
Human mutations in MTHFD1 have recently been identified in patients with severe
combined immunodeficiency (SCID). SCID results from inborn errors of metabolism
that cause impaired T- and B-cell proliferation and function. One of the most
common causes of SCID is adenosine deaminase (ADA) deficiency, which ultimately
inhibits DNA synthesis and cell division. MTHFD1 has been shown to translocate
to the nucleus during S-phase of the cell cycle; this localization is critical
for synthesis of thymidyate (dTMP or the “T” base in DNA) and
subsequent progression through the cell cycle and cell proliferation.
Identification of MTHFD1 mutations that are associated with
SCID highlights the potential importance of adequate dTMP synthesis in the
etiology of SCID.
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Affiliation(s)
- Martha S Field
- Division of Nutritional Sciences; Cornell University ; Ithaca, NY USA
| | - Elena Kamynina
- Division of Nutritional Sciences; Cornell University ; Ithaca, NY USA
| | - David Watkins
- Department of Human Genetics, McGill University; Department of Medical Genetics; McGill University Health Center ; Montreal, Quebec, Canada
| | - David S Rosenblatt
- Department of Human Genetics, McGill University; Department of Medical Genetics; McGill University Health Center ; Montreal, Quebec, Canada
| | - Patrick J Stover
- Division of Nutritional Sciences; Cornell University; Ithaca, NY USA; Graduate Field of Biochemistry; Molecular and Cell Biology; Cornell University; Ithaca, NY USA
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Linking genes to neurological clinical practice: the genomic basis for neurorehabilitation. J Neurol Phys Ther 2015; 39:52-61. [PMID: 25415554 DOI: 10.1097/npt.0000000000000066] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Large-scale genomics projects such as the Human Genome Project and the International HapMap Project promise significant advances in the ability to diagnose and treat many conditions, including those with a neurological basis. A major focus of research has emerged in the neurological sciences to elucidate the molecular and genetic basis of various neurological diseases. Indeed, genetic factors are implicated in susceptibility for many neurological disorders, with family history studies providing strong evidence of familial risk for conditions such as stroke, Parkinson's, Alzheimer's, and Huntington's diseases. Heritability studies also suggest a strong genetic contribution to the risk for neurological diseases. Genome-wide association studies are also uncovering novel genetic variants associated with neurological disorders. Whole-genome and exome sequencing are likely to provide novel insights into the genetic basis of neurological disorders. Genetic factors are similarly associated with clinical phenotypes such as symptom severity and progression as well as response to treatment. Specifically, disease progression and functional restoration depend, in part, on the capacity for neural plasticity within residual neural tissues. Furthermore, such plasticity may be influenced in part by the presence of polymorphisms in several genes known to orchestrate neural plasticity including brain-derived neurotrophic factor (BDNF) and Apolipoprotein E. (APOE). It is important for neurorehabilitation therapist practicing in the "genomic era" to be aware of the potential influence of genetic factors during clinical encounters, as advances in molecular sciences are revealing information of critical relevance to the clinical rehabilitation management of individuals with neurological conditions. Video Abstract available (See Video, Supplemental Digital Content 1, http://links.lww.com/JNPT/A88) for more insights from the authors.
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