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Lee KS, Choi YJ, Cho J, Lee H, Lee H, Park SJ, Park JS, Hong YC. Environmental and Genetic Risk Factors of Congenital Anomalies: an Umbrella Review of Systematic Reviews and Meta-Analyses. J Korean Med Sci 2021; 36:e183. [PMID: 34282604 PMCID: PMC8289720 DOI: 10.3346/jkms.2021.36.e183] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 06/15/2021] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND The prevalence of congenital anomalies in newborns in South Korea was 272.9 per 100,000 in 2005, and 314.7 per 100,000 in 2006. In other studies, the prevalence of congenital anomalies in South Korea was equivalent to 286.9 per 10,000 livebirths in 2006, while it was estimated 446.3 per 10,000 births during the period from 2008 to 2014. Several systematic reviews and meta-analyses analyzing the factors contributing to congenital anomalies have been reported, but comprehensive umbrella reviews are lacking. METHODS We searched PubMed, Google Scholar, Cochrane, and EMBASE databases up to July 1, 2019, for systematic reviews and meta-analyses that investigated the effects of environmental and genetic factors on any type of congenital anomalies. We categorized 8 subgroups of congenital anomalies classified according to the 10th revision of the International Statistical Classification of Diseases (ICD-10). Two researchers independently searched the literature, retrieved the data, and evaluated the quality of each study. RESULTS We reviewed 66 systematic reviews and meta-analyses that investigated the association between non-genetic or genetic risk factors and congenital anomalies. Overall, 269 associations and 128 associations were considered for environmental and genetic risk factors, respectively. Congenital anomalies based on congenital heart diseases, cleft lip and palate, and others were associated with environmental risk factors based on maternal exposure to environmental exposures (air pollution, toxic chemicals), parental smoking, maternal history (infectious diseases during pregnancy, pregestational and gestational diabetes mellitus, and gestational diabetes mellitus), maternal obesity, maternal drug intake, pregnancy through artificial reproductive technologies, and socioeconomic factors. The association of maternal alcohol or coffee consumption with congenital anomalies was not significant, and maternal folic acid supplementation had a preventive effect on congenital heart defects. Genes or genetic loci associated with congenital anomalies included MTHFR, MTRR and MTR, GATA4, NKX2-5, SRD5A2, CFTR, and 1p22 and 20q12 anomalies. CONCLUSION This study provides a wide perspective on the distribution of environmental and genetic risk factors of congenital anomalies, thus suggesting future studies and providing health policy implications.
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Affiliation(s)
- Kyung Shin Lee
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea
- Environmental Health Center, Seoul National University College of Medicine, Seoul, Korea
| | - Yoon Jung Choi
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea
- Environmental Health Center, Seoul National University College of Medicine, Seoul, Korea
| | - Jinwoo Cho
- Department of Statistics, University of Pittsburgh, Pittsburgh, PA, USA
| | - Hyunji Lee
- Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, Korea
| | - Heejin Lee
- Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, Korea
| | - Soo Jin Park
- Department of Surgery, Wonkwang University Sanbon Hospital, Gunpo, Korea
| | - Joong Shin Park
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Korea
| | - Yun Chul Hong
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea
- Environmental Health Center, Seoul National University College of Medicine, Seoul, Korea
- Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, Korea.
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Kvaratskhelia T, Abzianidze E, Asatiani K, Kvintradze M, Surmava S, Kvaratskhelia E. Methylenetetrahydrofolate Reductase (MTHFR) C677T and A1298C Polymorphisms in Georgian Females with Hypothyroidism. Glob Med Genet 2020; 7:47-50. [PMID: 32939515 PMCID: PMC7490122 DOI: 10.1055/s-0040-1714091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
AbstractThe aim of this study was to investigate the frequency of methylenetetrahydrofolate reductase (MTHFR) gene polymorphisms in Georgian females with hypothyroidism. Thirty-four patients and 29 healthy individuals were recruited in this study. Polymerase chain reaction-restriction fragment length polymorphism analyses were used for genotyping of MTHFR polymorphisms. The results of this study suggest that the MTHFR C677T variant was significantly associated with hypothyroidism. In addition, in individuals with T allele risk of hypothyroidism significantly increased. Combination of CT/AA genotypes was more prevalent in the hypothyroid patients than in the control group. Thus, C677T polymorphism could be a possible genetic factor contributing to the pathophysiology of hypothyroidism, possibly through hyperhomocysteinemia.
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Affiliation(s)
- Tamar Kvaratskhelia
- Department of Molecular and Medical Genetics, Tbilisi State Medical University, Tbilisi, Georgia
- Division of Endoctinology, Medical Center “Medimedi,” Tbilisi, Georgia
| | - Elene Abzianidze
- Department of Molecular and Medical Genetics, Tbilisi State Medical University, Tbilisi, Georgia
| | - Ketevan Asatiani
- Metabolic Disorders, National Institute of Endocrinology, Tbilisi, Georgia
| | - Merab Kvintradze
- Department of Molecular and Medical Genetics, Tbilisi State Medical University, Tbilisi, Georgia
| | - Sandro Surmava
- Department of Molecular and Medical Genetics, Tbilisi State Medical University, Tbilisi, Georgia
| | - Eka Kvaratskhelia
- Department of Molecular and Medical Genetics, Tbilisi State Medical University, Tbilisi, Georgia
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Li D, Wang E, Gao X, Li P. The correlation between methylenetetrahydrofolate reductase gene 677C > T polymorphism and fetal congenital defects: A meta-analysis. Pteridines 2020. [DOI: 10.1515/pteridines-2020-0002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Objective To investigate the correlation between the methylenetetrahydrofolate reductase (MTHFR) gene 677C> T polymorphism and fetal congenital defects.
Method Original studies relevant to the MTHFR gene 677C>T single nucleotide polymorphism and fetal congenital defects were systematically searched in the electronic databases of Medline, EMBSE and China National Knowledge Infrastructure (CNKI). All relevant publications were screened for inclusion in the present work. The correlation between the MTHFR gene 677C > T single nucleotide polymorphism and the occurrence of fetal congenital defects was expressed as an odds ratio (OR) and its 95% confidence interval (95% CI). Publication bias was assessed by Begg’s funnel plot and Egger’s line regression test.
Results Nineteen case-control studies were ultimately included in the present meta-analysis. The pooled results indicated that the general risk of fetal congenital defects was significantly elevated in subjects with the 677T allele of the MTHFR gene in dominant (OR=1.07,95%CI:1.03-1.12, P<0.05), homozygous (OR=1.17,95%CI:1.06-1.30, P<0.05) and recessive genetic models (OR=1.16,95%CI:1.03-1.31, P<0.05) through the random effect method. However, significant publication bias was identified upon pooling the individual data and evaluating the correlation.
Conclusion According to the present evidence, the MTHFR gene 677C>T single nucleotide polymorphism is correlated with poor pregnancy outcomes, and subjects with the T allele have an increased risk of developing general fetal congenital defects.
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Affiliation(s)
- Dexia Li
- Department of Health Education , Maternal and Child Health Hospital of Zhangqiu District , Jinan City, Shandong Province, 250200 PR China
| | - Enxia Wang
- Department of Nutrition , Maternal and Child Health Hospital of Zhangqiu District , Jinan City, Shandong Province, 250200 PR China
| | - Xia Gao
- Department of Child Healthcare , Maternal and Child Health Hospital of Zhangqiu District , Jinan City, Shandong Province, 250200 PR China
| | - Ping Li
- Department of Pregnant Women Management Center , Maternal and Child Health Hospital of Zhangqiu District , Jinan City, Shandong Province, 250200 PR China
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Suliburska J, Kocyłowski R, Grzesiak M, Gaj Z, Chan B, von Kaisenberg C, Lamers Y. Evaluation of folate concentration in amniotic fluid and maternal and umbilical cord blood during labor. Arch Med Sci 2019; 15:1425-1432. [PMID: 31749870 PMCID: PMC6855149 DOI: 10.5114/aoms.2018.78776] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 09/08/2018] [Indexed: 12/30/2022] Open
Abstract
INTRODUCTION Folate is required for fetal, placental and maternal tissue growth during pregnancy. A decline in maternal circulating folate concentrations and an increase in total homocysteine (a non-specific indicator of folate deficiency) have been observed with the progression of pregnancy. However, the role of folate in the third trimester of pregnancy is not clear and folate status in late pregnancy has not so far been widely analyzed. The main aim of this retrospective cross-sectional study was to determine the folate concentrations in amniotic fluid and in maternal and umbilical cord blood serum derived during delivery. MATERIAL AND METHODS This study was conducted on 175 pregnant Polish women (white/Caucasian) aged between 17 and 42 years. Only pregnancies without birth defects were included in this study. Amniotic fluid, maternal serum, and umbilical cord blood samples were collected during vaginal delivery or cesarean section. Folate concentration was determined using a microbiological assay. RESULTS Strong correlations were observed between the concentrations of folate in amniotic fluid and maternal serum (rho = 0.67, p < 0.001) and amniotic fluid and cord blood serum (rho = 0.49, p < 0.001) and between maternal serum and cord blood serum (rho = 0.67, p < 0.001). Folate concentrations in amniotic fluid were significantly associated with maternal age (rho = 0.19, p < 0.05). Pre-pregnancy body mass index and maternal weight/neonatal birth weight ratio were independent predictors of folate concentrations in maternal serum (β = 0.33, p < 0.05; β = -0.19, p < 0.05) and amniotic fluid (β = 0.28, p < 0.05; β = -0.19, p < 0.05) in late pregnancy. CONCLUSIONS Folate concentrations in amniotic fluid are associated with maternal and neonatal folate status peripartum in healthy women.
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Affiliation(s)
- Joanna Suliburska
- Institute of Human Nutrition and Dietetics, Poznan University of Life Sciences, Poznan, Poland
| | - Rafał Kocyłowski
- Department of Perinatology and Gynecology, Polish Mother’s Memorial Hospital Research Institute, Lodz, Poland
| | - Mariusz Grzesiak
- Department of Perinatology and Gynecology, Polish Mother’s Memorial Hospital Research Institute, Lodz, Poland
| | - Zuzanna Gaj
- Department of Perinatology and Gynecology, Polish Mother’s Memorial Hospital Research Institute, Lodz, Poland
| | - Benny Chan
- Food, Nutrition and Health Program, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Constantin von Kaisenberg
- Klinik für Frauenheilkunde und Geburtshilfe Pränatalmedizin (MVZ) Medizinische Hochschule Hannover, Germany
| | - Yvonne Lamers
- Food, Nutrition and Health Program, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, British Columbia, Canada
- British Columbia Children’s Hospital Research Institute, Vancouver, British Columbia, Canada
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Caldeira-Araújo H, Ramos R, Florindo C, Rivera I, Castro R, Tavares de Almeida I. Homocysteine Metabolism in Children and Adolescents: Influence of Age on Plasma Biomarkers and Correspondent Genotype Interactions. Nutrients 2019; 11:nu11030646. [PMID: 30884849 PMCID: PMC6471758 DOI: 10.3390/nu11030646] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 02/26/2019] [Accepted: 03/06/2019] [Indexed: 12/26/2022] Open
Abstract
Background: Imbalance of homocysteine (Hcy) metabolism links with several pathologies; nevertheless, it is poorly characterized in pediatric populations. This study investigated the impact of age on plasma concentrations of Hcy and relevant biomarkers along with correspondent genotype interactions. Methods: A healthy pediatric cohort aged 9 (n = 195) and 17 (n = 128) years old (yo) was studied. Immunoassays and GC-MS-SIM-mode quantified plasma levels of Hcy and biomarkers. PCR-RFLP or quantitative-PCR assays assessed common variations in related genes. Results: Age impacted on levels of Hcy and metabolic markers: older children presented with the lowest folates and total-cobalamin (tCbl), while with the highest Hcy concentrations, whereas methylmalonic acid (MMA) and holotranscobalamin (Holo-TC) levels remained similar in 9-yo and 17-yo children. The relationships between B-vitamins and metabolic markers were also dependent on age. Only in the older children, MMA correlated with tCbl and Holo-TC, and MMA levels were markedly higher in the 17-yo subjects presenting with the lowest quartiles of Holo-TC concentrations. Lastly, age also impacted on the correlations between genotype and biomarkers. In the 17-yo group, however not in the 9-yo children, tHcy differed between MTHFR 677 genotypes, with subjects who had the MTHFR 677TT genotype displaying the highest tHcy concentrations. Conclusions: Age impacts on the Hcy metabolism dynamics in a pediatric population.
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Affiliation(s)
- Helena Caldeira-Araújo
- Faculty of Life Sciences, University of Madeira, Campus da Penteada, 9000-390 Funchal, Portugal.
- Centro de Química da Madeira, University of Madeira, Campus da Penteada, 9000-390 Funchal, Portugal.
| | - Ruben Ramos
- Metabolism and Genetics Laboratory, Research Institute for Medicines (i.Med.ULisboa), Faculty of Pharmacy, University of Lisbon, 1649-003 Lisbon, Portugal.
| | - Cristina Florindo
- Metabolism and Genetics Laboratory, Research Institute for Medicines (i.Med.ULisboa), Faculty of Pharmacy, University of Lisbon, 1649-003 Lisbon, Portugal.
| | - Isabel Rivera
- Metabolism and Genetics Laboratory, Research Institute for Medicines (i.Med.ULisboa), Faculty of Pharmacy, University of Lisbon, 1649-003 Lisbon, Portugal.
- Department of Biochemistry and Human Biology, Faculty of Pharmacy, University of Lisbon, 1649-003 Lisbon, Portugal.
| | - Rita Castro
- Metabolism and Genetics Laboratory, Research Institute for Medicines (i.Med.ULisboa), Faculty of Pharmacy, University of Lisbon, 1649-003 Lisbon, Portugal.
- Department of Biochemistry and Human Biology, Faculty of Pharmacy, University of Lisbon, 1649-003 Lisbon, Portugal.
- Department of Nutritional Sciences, The Pennsylvania State University, University Park, PA 16802, USA.
| | - Isabel Tavares de Almeida
- Metabolism and Genetics Laboratory, Research Institute for Medicines (i.Med.ULisboa), Faculty of Pharmacy, University of Lisbon, 1649-003 Lisbon, Portugal.
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Griffioen PH, van Dam-Nolen DHK, Lindemans J, Heil SG. Measurement of total Transcobalamin employing a commercially available assay for Active B12. Clin Biochem 2017; 50:1030-1033. [PMID: 28823760 DOI: 10.1016/j.clinbiochem.2017.08.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 08/15/2017] [Accepted: 08/16/2017] [Indexed: 11/17/2022]
Abstract
INTRODUCTION Vitamin B12 deficiency is mostly caused by insufficient gastro-intestinal absorption and in rare conditions by Transcobalamin (TC) deficiency. Unsaturated Transcobalamin (apoTC) can be measured by a binding assay using radiolabeled cobalamin. The Active B12 test analyzes saturated Transcobalamin (holoTC) and we hypothesize that this test can be used to measure total TC by additional in vitro saturation with cobalamin. METHODS Serum was saturated in vitro (16 times dilution) with a cyanocobalamin solution and total TC was selectively measured with the Abbott Active B12 test. ApoTC was calculated by subtracting endogenous holoTC from total TC after correction for dilution. Linearity was determined with a pool serum dilution series. Precision was investigated according to the CLSI EP15 protocol. Method comparison was performed against a binding assay using radiolabeled cobalamin. Reference values were determined in 100 healthy controls. RESULTS The method was linear in the range of 240 to 1933pmol/L (R2=0.997, lack of fit F=1.61). Precision of low- and high-pool total TC in serum were; 5.2% and 4.3% respectively. Method comparison against a radiolabeled cobalamin binding assay showed a proportional bias of 30% (y=0.70x+126). Total TC reference values were determined at 500-1276pmol/L. CONCLUSION We describe a rapid method to quantify total TC, which can be implemented on routine platforms using commercial Active B12 tests. In addition, apoTC can be assessed by subtracting endogenous holoTC concentration which can be measured in the same run, securing the same calibration level for all three parameters (holoTC, apoTC and total TC). This method is applicable in clinical diagnostics and in larger epidemiological studies.
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Affiliation(s)
- Pieter H Griffioen
- Erasmus MC University Medical Center Rotterdam, Department of Clinical Chemistry, PO box 2040, 3000 CA Rotterdam, The Netherlands
| | - Dianne H K van Dam-Nolen
- Erasmus MC University Medical Center Rotterdam, Department of Clinical Chemistry, PO box 2040, 3000 CA Rotterdam, The Netherlands
| | - Jan Lindemans
- Erasmus MC University Medical Center Rotterdam, Department of Clinical Chemistry, PO box 2040, 3000 CA Rotterdam, The Netherlands
| | - Sandra G Heil
- Erasmus MC University Medical Center Rotterdam, Department of Clinical Chemistry, PO box 2040, 3000 CA Rotterdam, The Netherlands.
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Khot VV, Yadav DK, Shrestha S, Kaur L, Sundrani DP, Chavan-Gautam PM, Mehendale SS, Chandak GR, Joshi SR. Hypermethylated CpG sites in the MTR gene promoter in preterm placenta. Epigenomics 2017; 9:985-996. [PMID: 28617183 DOI: 10.2217/epi-2016-0173] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AIM Altered maternal one-carbon metabolism influences placental DNA methylation patterns and 'programs' the fetus for noncommunicable diseases in adult life. EXPERIMENTAL PROCEDURES Levels of plasma folate, vitamin B12, homocysteine, mRNA and protein levels of MTHFR and MTR enzymes in placenta were compared among women delivering preterm (n = 83) and term (n = 75). MTR promoter CpG methylation was undertaken. RESULTS MTHFR and MTR mRNA levels were higher while protein levels were lower, and MTR CpG sites were hypermethylated in the preterm group, as compared with the term group. Methylated CpG sites were negatively associated with maternal plasma vitamin B12 levels. CONCLUSION Study suggests a dysregulation of enzyme genes in remethylation arm of the one-carbon metabolism in placenta of women delivering preterm.
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Affiliation(s)
- Vinita V Khot
- Departments of Nutritional Medicine, Interactive Research School for Health Affairs, Bharati Vidyapeeth University, Pune 411043, Maharashtra, India
| | - Dilip K Yadav
- Genomic Research on Complex Diseases (GRC Group), CSIR-Centre for Cellular & Molecular Biology (CSIR-CCMB), Habsiguda, Uppal Road, Hyderabad 500007, Telangana, India
| | - Smeeta Shrestha
- Genomic Research on Complex Diseases (GRC Group), CSIR-Centre for Cellular & Molecular Biology (CSIR-CCMB), Habsiguda, Uppal Road, Hyderabad 500007, Telangana, India
| | - Lovejeet Kaur
- Genomic Research on Complex Diseases (GRC Group), CSIR-Centre for Cellular & Molecular Biology (CSIR-CCMB), Habsiguda, Uppal Road, Hyderabad 500007, Telangana, India
| | - Deepali P Sundrani
- Departments of Nutritional Medicine, Interactive Research School for Health Affairs, Bharati Vidyapeeth University, Pune 411043, Maharashtra, India
| | - Preeti M Chavan-Gautam
- Departments of Nutritional Medicine, Interactive Research School for Health Affairs, Bharati Vidyapeeth University, Pune 411043, Maharashtra, India
| | - Savita S Mehendale
- Obstetrics & Gynecology, Bharati Medical College & Hospital, Bharati Vidyapeeth University, Pune 411043, Maharashtra, India
| | - Giriraj R Chandak
- Genomic Research on Complex Diseases (GRC Group), CSIR-Centre for Cellular & Molecular Biology (CSIR-CCMB), Habsiguda, Uppal Road, Hyderabad 500007, Telangana, India
| | - Sadhana R Joshi
- Departments of Nutritional Medicine, Interactive Research School for Health Affairs, Bharati Vidyapeeth University, Pune 411043, Maharashtra, India
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Waltrick-Zambuzzi M, Tannure PN, Vieira TCDS, Antunes LS, Romano FL, Zambuzzi WF, Granjeiro JM, Küchler EC. Genetic Variants in Folate and Cobalamin Metabolism-Related Genes in Nonsyndromic Cleft Lip and/or Palate. Braz Dent J 2015; 26:561-5. [DOI: 10.1590/0103-6440201300394] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 11/08/2015] [Indexed: 11/21/2022] Open
Abstract
The aim of this study was to evaluate the association of the polymorphisms in TCN2 (rs1801198) gene and in MTRR (rs1801394) gene with nonsyndromic cleft lip and/or palate (NSCL/P) in a Brazilian population. Genomic DNA was extracted from buccal cells. The polymorphisms in TCN2 (rs1801198) and MTRR (rs1801394) genes were genotyped by carrying out real-time PCR and Taqman assay. Chi-square test was used to determine the association between genotype and allele frequencies with NSCL/P and NSCL/P subgroups (cleft lip only, cleft lip and palate, and cleft palate only). Eight hundred and sixty seven unrelated individuals (401 cases with NSCL/P and 466 individuals without cleft) were evaluated. Genotype distributions of TCN2 and MTRR polymorphisms were in Hardy-Weinberg equilibrium. The TCN2 polymorphic genotype GG was identified in 16.7% of the NSCL/P group and in 14.1% of the non-cleft group (p>0.05). Similarly, the frequency of MTRR genotype (GG) was similar in NSCL/P group (15.5%) and control group (17.8%) (p>0.05). Multivariate analysis showed an association between MTRR and the subgroup that the mother smoked during pregnancy (p=0.039). Our findings did not demonstrate an association between TCN2 polymorphisms and NSCL/P, however suggests an association between MTRR and NSCL/P etiology
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Affiliation(s)
| | | | | | | | | | | | - José Mauro Granjeiro
- UFF - Universidade Federal Fluminense, Brazil; INMETRO - Instituto Nacional de Metrologia Qualidade e Tecnologia, Brazil
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Genetic variant in MTRR A66G, but not MTR A2756G, is associated with risk of non-syndromic cleft lip and palate in Indian population. JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY MEDICINE AND PATHOLOGY 2015. [DOI: 10.1016/j.ajoms.2015.04.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Pangilinan F, Molloy AM, Mills JL, Troendle JF, Parle-McDermott A, Kay DM, Browne ML, McGrath EC, Abaan HO, Sutton M, Kirke PN, Caggana M, Shane B, Scott JM, Brody LC. Replication and exploratory analysis of 24 candidate risk polymorphisms for neural tube defects. BMC MEDICAL GENETICS 2014; 15:102. [PMID: 25293959 PMCID: PMC4411759 DOI: 10.1186/s12881-014-0102-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Accepted: 08/19/2014] [Indexed: 12/14/2022]
Abstract
Background Neural tube defects (NTDs), which are among the most common congenital malformations, are influenced by environmental and genetic factors. Low maternal folate is the strongest known contributing factor, making variants in genes in the folate metabolic pathway attractive candidates for NTD risk. Multiple studies have identified nominally significant allelic associations with NTDs. We tested whether associations detected in a large Irish cohort could be replicated in an independent population. Methods Replication tests of 24 nominally significant NTD associations were performed in racially/ethnically matched populations. Family-based tests of fifteen nominally significant single nucleotide polymorphisms (SNPs) were repeated in a cohort of NTD trios (530 cases and their parents) from the United Kingdom, and case–control tests of nine nominally significant SNPs were repeated in a cohort (190 cases, 941 controls) from New York State (NYS). Secondary hypotheses involved evaluating the latter set of nine SNPs for NTD association using alternate case–control models and NTD groupings in white, African American and Hispanic cohorts from NYS. Results Of the 24 SNPs tested for replication, ADA rs452159 and MTR rs10925260 were significantly associated with isolated NTDs. Of the secondary tests performed, ARID1A rs11247593 was associated with NTDs in whites, and ALDH1A2 rs7169289 was associated with isolated NTDs in African Americans. Conclusions We report a number of associations between SNP genotypes and neural tube defects. These associations were nominally significant before correction for multiple hypothesis testing. These corrections are highly conservative for association studies of untested hypotheses, and may be too conservative for replication studies. We therefore believe the true effect of these four nominally significant SNPs on NTD risk will be more definitively determined by further study in other populations, and eventual meta-analysis. Electronic supplementary material The online version of this article (doi:10.1186/s12881-014-0102-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Faith Pangilinan
- Molecular Pathogenesis Section, Genome Technology Branch, National Human Genome Research Institute, National Institutes of Health, Room 5306, 50 South Drive, Bethesda, MD, 20892-8004, USA.
| | - Anne M Molloy
- Department of Clinical Medicine, Trinity College Dublin, Dublin, Ireland.
| | - James L Mills
- Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA.
| | - James F Troendle
- Office of Biostatistics Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA.
| | | | - Denise M Kay
- New York State Department of Health, Division of Genetics, Wadsworth Center, Albany, NY, 12201, USA.
| | - Marilyn L Browne
- New York State Department of Health, Congenital Malformations Registry, Troy, NY, 12180, USA. .,Department of Epidemiology and Biostatistics, School of Public Health, University at Albany, Rensselaer, NY, 12144, USA.
| | - Emily C McGrath
- New York State Department of Health, Division of Genetics, Wadsworth Center, Albany, NY, 12201, USA.
| | - Hatice Ozel Abaan
- Molecular Pathogenesis Section, Genome Technology Branch, National Human Genome Research Institute, National Institutes of Health, Room 5306, 50 South Drive, Bethesda, MD, 20892-8004, USA.
| | - Marie Sutton
- Evidence Centre, Health Research Board, Dublin, Ireland.
| | - Peadar N Kirke
- Child Health Epidemiology Unit, Health Research Board, Dublin, Ireland.
| | - Michele Caggana
- New York State Department of Health, Division of Genetics, Wadsworth Center, Albany, NY, 12201, USA.
| | - Barry Shane
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, CA, 94720-3104, USA.
| | - John M Scott
- School of Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland.
| | - Lawrence C Brody
- Molecular Pathogenesis Section, Genome Technology Branch, National Human Genome Research Institute, National Institutes of Health, Room 5306, 50 South Drive, Bethesda, MD, 20892-8004, USA.
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Quintana AM, Geiger EA, Achilly N, Rosenblatt DS, Maclean KN, Stabler SP, Artinger KB, Appel B, Shaikh TH. Hcfc1b, a zebrafish ortholog of HCFC1, regulates craniofacial development by modulating mmachc expression. Dev Biol 2014; 396:94-106. [PMID: 25281006 DOI: 10.1016/j.ydbio.2014.09.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 09/24/2014] [Indexed: 12/01/2022]
Abstract
Mutations in HCFC1 (MIM300019), have been recently associated with cblX (MIM309541), an X-linked, recessive disorder characterized by multiple congenital anomalies including craniofacial abnormalities. HCFC1 is a transcriptional co-regulator that modulates the expression of numerous downstream target genes including MMACHC, but it is not clear how these HCFC1 targets play a role in the clinical manifestations of cblX. To begin to elucidate the mechanism by which HCFC1 modulates disease phenotypes, we have carried out loss of function analyses in the developing zebrafish. Of the two HCFC1 orthologs in zebrafish, hcfc1a and hcfc1b, the loss of hcfc1b specifically results in defects in craniofacial development. Subsequent analysis revealed that hcfc1b regulates cranial neural crest cell differentiation and proliferation within the posterior pharyngeal arches. Further, the hcfc1b-mediated craniofacial abnormalities were rescued by expression of human MMACHC, a downstream target of HCFC1 that is aberrantly expressed in cblX. Furthermore, we tested distinct human HCFC1 mutations for their role in craniofacial development and demonstrated variable effects on MMACHC expression in humans and craniofacial development in zebrafish. Notably, several individuals with mutations in either HCFC1 or MMACHC have been reported to have mild to moderate facial dysmorphia. Thus, our data demonstrates that HCFC1 plays a role in craniofacial development, which is in part mediated through the regulation of MMACHC expression.
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Affiliation(s)
- Anita M Quintana
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO 80045, USA.
| | - Elizabeth A Geiger
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO 80045, USA.
| | - Nate Achilly
- Genetics and Molecular Biology Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892, USA.
| | - David S Rosenblatt
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada H3A 1B1.
| | - Kenneth N Maclean
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO 80045, USA; Section of Genetics, University of Colorado, School of Medicine, Aurora, CO 80045, USA.
| | - Sally P Stabler
- Department of Medicine, University of Colorado School of Medicine, CO 80045, USA.
| | - Kristin B Artinger
- Department of Craniofacial Biology, School of Dental Medicine, University of Colorado, CO 80045, USA.
| | - Bruce Appel
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO 80045, USA.
| | - Tamim H Shaikh
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO 80045, USA; Section of Genetics, University of Colorado, School of Medicine, Aurora, CO 80045, USA.
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12
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Yu D, Yang L, Shen S, Fan C, Zhang W, Mo X. Association between methionine synthase reductase A66G polymorphism and the risk of congenital heart defects: evidence from eight case-control studies. Pediatr Cardiol 2014; 35:1091-8. [PMID: 24913415 DOI: 10.1007/s00246-014-0948-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Accepted: 05/22/2014] [Indexed: 01/27/2023]
Abstract
Methionine synthase reductase (MTRR) plays a major role in hyperhomocysteinemia, a risk factor related to the occurrence of congenital heart defects (CHDs). However, the associations between MTRR polymorphism and CHDs have been inconclusive. Thus, a metaanalysis of eight case-control studies was conducted to investigate 3,592 cases and 3,638 control subjects for MTRR A66G polymorphism to identify the association. Odds ratios (ORs) and 95 % confidence intervals (95 % CIs) were used to assess the strength of the association. The results showed that MTRR A66G polymorphism was associated with a higher CHD risk in the allele comparison (G vs A: OR 1.163; 95 % CI 1.016-1.330; P heterogeneity = 0.004), the homozygote comparison (GG vs AA: OR 1.332; 95 % CI 1.020-1.740; P heterogeneity = 0.035), and the dominant model (GG/AG vs AA: OR 1.218; 95 % CI 1.001-1.482; P heterogeneity = 0.001). In the subgroup analysis, this polymorphism was associated with CHDs in Asians in the homozygote comparison (GG vs AA: OR 1.427; 95 % CI 1.017-2.001; P heterogeneity = 0.019) and the allele comparison (G vs A: OR 1.203; 95 % CI 1.018-1.422; P heterogeneity = 0.002). In summary, the metaanalysis demonstrated that MTRR A66G polymorphism is a risk factor for CHDs. Further studies should be performed to investigate the association of plasma homocysteine levels, enzyme activity, parental genotypes, and vitamin complex intakes with the risk of CHDs.
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Affiliation(s)
- Di Yu
- Department of Cardiothoracic Surgery, Nanjing Children's Hospital, Nanjing Medical University, Nanjing, 210008, China
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13
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Jiang C, Yin N, Zhao Z, Wu D, Wang Y, Li H, Song T. Lack of Association Between MTHFR, MTR, MTRR, and TCN2 Genes and Nonsyndromic CL±P in a Chinese Population: Case-Control Study and Meta-Analysis. Cleft Palate Craniofac J 2014; 52:579-87. [PMID: 25105440 DOI: 10.1597/14.067] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Nonsyndromic cleft lip with or without cleft palate (NSCLP) is a common congenital deformity, often associated with folate deficiency. The genes MTHFR, MTR, MTRR, and TCN2 play key roles in folate metabolism. The risk of NSCLP associated with particular variants in the folic acid pathway differs among ethnic groups. The goal of this study was to explore whether genetic variations in these four genes, as well as gene-gene interactions, are associated with NSCLP. We investigated 7 tagSNPs for MTHFR, 18 tagSNPs for MTR, 15 tagSNPs for MTRR, and 7 tagSNPs for TCN2 selected from HapMap data in a Chinese population. These single nucleotide polymorphisms (SNPs) were examined for associations with NSCLP in 204 patients and 226 controls. We then performed a meta-analysis of association between rs1801133 and NSCLP. There was a significant difference in the allele frequency and haplotype analysis of rs4077829 and rs10802565 in MTR between the NSCLP and control groups but not a significant difference after correction with 10,000 times permutations. The allele frequency, haplotype analysis, and gene-gene interactions of other SNPs did not show a significant difference. The meta-analysis results showed that no significant differences were found for allele comparison, heterozygote comparison, homozygote comparison, dominant model comparison, or recessive model comparison. The alterations of folate metabolism related to these polymorphisms are not involved in NSCLP in the Chinese population.
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Devalia V, Hamilton MS, Molloy AM. Guidelines for the diagnosis and treatment of cobalamin and folate disorders. Br J Haematol 2014; 166:496-513. [PMID: 24942828 DOI: 10.1111/bjh.12959] [Citation(s) in RCA: 236] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The clinical picture is the most important factor in assessing the significance of test results assessing cobalamin status because there is no 'gold standard' test to define deficiency. Serum cobalamin currently remains the first-line test, with additional second-line plasma methylmalonic acid to help clarify uncertainties of underlying biochemical/functional deficiencies. Serum holotranscobalamin has the potential as a first-line test, but an indeterminate 'grey area' may still exist. Plasma homocysteine may be helpful as a second-line test, but is less specific than methylmalonic acid. The availability of these second-line tests is currently limited. Definitive cut-off points to define clinical and subclinical deficiency states are not possible, given the variety of methodologies used and technical issues, and local reference ranges should be established. In the presence of discordance between the test result and strong clinical features of deficiency, treatment should not be delayed to avoid neurological impairment. Treatment of cobalamin deficiency is recommended in line with the British National Formulary. Oral therapy may be suitable and acceptable provided appropriate doses are taken and compliance is not an issue. Serum folate offers equivalent diagnostic capability to red cell folate and is the first-line test of choice to assess folate status.
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15
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Figueiredo RF, Figueiredo N, Feguri A, Bieski I, Mello R, Espinosa M, Damazo AS. The role of the folic acid to the prevention of orofacial cleft: an epidemiological study. Oral Dis 2014; 21:240-7. [PMID: 24828118 DOI: 10.1111/odi.12256] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 04/06/2014] [Accepted: 04/27/2014] [Indexed: 01/12/2023]
Abstract
BACKGROUND Orofacial clefts (OFCs) have complex and multifactorial etiologies. Periconceptional folic acid supplementation can significantly reduce the risk of OFC. OBJECTIVE To evaluate the role of folate and other factors in preventing OFC by analyzing the health and socio-demographic data collected from a population sample. METHODS Retrospective case-control study in which mothers with children with or without OFC were evaluated for the following main parameters: nutritional factors, socio-demographic characteristics, pregnancy and family history, use of folate, and counseling by healthcare professionals. RESULTS Socio-epidemiological analysis of the 80 participants, 40 in the case group and 40 in the control group, found a significant impact on the risk of OFC related to economic and educational status. The mothers who had a diet rich in vegetables and white meat had a lower risk of having children with OFC. A short interval between pregnancies, subsequent pregnancy while still breastfeeding, and family history also increased risk of OFC. CONCLUSIONS Limited family planning, diet low in folate, and inadequate use of folate during the periconceptional period and during the first trimester of pregnancy were demonstrated a potential correlation with a high incidence of OFC in this study.
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Affiliation(s)
- R F Figueiredo
- Post-Graduation in Health Science, Medical School, Federal University of Mato Grosso, Cuiaba, MT, Brazil; Cuiaba Emergency Hospital, Cuiaba, MT, Brazil
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16
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Ouyang S, Liu Z, Li Y, Ma F, Wu J. Cystathionine beta-synthase 844ins68 polymorphism is unrelated to susceptibility to neural tube defects. Gene 2014; 535:119-23. [DOI: 10.1016/j.gene.2013.11.052] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Revised: 11/04/2013] [Accepted: 11/22/2013] [Indexed: 01/05/2023]
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Chao CS, Wei J, Huang HW, Yang SC. Correlation between methyltetrahydrofolate reductase (MTHFR) polymorphisms and isolated patent ductus arteriosus in Taiwan. Heart Lung Circ 2014; 23:655-60. [PMID: 24566197 DOI: 10.1016/j.hlc.2014.01.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Revised: 12/23/2013] [Accepted: 01/17/2014] [Indexed: 12/11/2022]
Abstract
BACKGROUND Methylenetetrahydrofolate reductase (MTHFR) C677T and A1298C gene polymorphisms are associated with the risk of patent ductus arteriosus (PDA) congenital heart defects. This study aimed to determine the association of these polymorphisms in patients with isolated PDA and in non-PDA patients group without congenital heart disease. METHODS This retrospective case-controlled study was undertaken in 17 patients with isolated PDA and a control non-PDA group consisting of 34 subjects without congenital heart disease. MTHFR gene polymorphisms were analysed using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). In addition, the genotype distribution of the MTHFR gene was compared among different ethnicities using the HapMap database. RESULTS In contrast to the MTHFR C677T polymorphism, differences in the MTHFR A1298C genotype were observed between the two groups (P=0.002); a greater proportion of the PDA patients had the MTHFR 1298CC and 1298AA genotypes as compared to the non-PDA control group. After merging the data obtained from the Taiwanese participants with that from the HapMap database, genetic diversity of the MTHFR 1298AA genotype was observed. CONCLUSIONS Thus, the MTHFR A1298C polymorphism is associated with isolated PDA in Taiwan. Larger studies are necessary to evaluate the prognostic value of determining MTHFR polymorphism in PDA.
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Affiliation(s)
- Chia-Sheng Chao
- Division of Cardiovascular Surgery, Department of Surgery, Kaohsiung Armed Forces General Hospital, Kaohsiung 802, Taiwan, R.O.C; School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C
| | - Jeng Wei
- The Heart Center, Chen-Hsin General Hospital, Taipei 112, Taiwan, R.O.C.
| | - Hurng-Wern Huang
- Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung 804, Taiwan, R.O.C
| | - Shyh-Chyun Yang
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan, R.O.C; Department of Fragrance and Cosmetic Science, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
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18
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Moreno-Garcia MA, Rosenblatt DS, Jerome-Majewska LA. Vitamin B(12) metabolism during pregnancy and in embryonic mouse models. Nutrients 2013; 5:3531-50. [PMID: 24025485 PMCID: PMC3798919 DOI: 10.3390/nu5093531] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Revised: 08/10/2013] [Accepted: 08/23/2013] [Indexed: 11/16/2022] Open
Abstract
Vitamin B(12) (cobalamin, Cbl) is required for cellular metabolism. It is an essential coenzyme in mammals for two reactions: the conversion of homocysteine to methionine by the enzyme methionine synthase and the conversion of methylmalonyl-CoA to succinyl-CoA by the enzyme methylmalonyl-CoA mutase. Symptoms of Cbl deficiency are hematological, neurological and cognitive, including megaloblastic anaemia, tingling and numbness of the extremities, gait abnormalities, visual disturbances, memory loss and dementia. During pregnancy Cbl is essential, presumably because of its role in DNA synthesis and methionine synthesis; however, there are conflicting studies regarding an association between early pregnancy loss and Cbl deficiency. We here review the literature about the requirement for Cbl during pregnancy, and summarized what is known of the expression pattern and function of genes required for Cbl metabolism in embryonic mouse models.
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Affiliation(s)
- Maira A. Moreno-Garcia
- Department of Human Genetics, McGill University, 1205 Avenue Docteur Penfield, N5/13,Montreal, Quebec, Canada H3A 1B1; E-Mails: (M.A.M.-G.); (D.S.R.)
| | - David S. Rosenblatt
- Department of Human Genetics, McGill University, 1205 Avenue Docteur Penfield, N5/13,Montreal, Quebec, Canada H3A 1B1; E-Mails: (M.A.M.-G.); (D.S.R.)
- Department of Pediatrics, McGill University, Montreal, Quebec, Canada H3H 1P3
| | - Loydie A. Jerome-Majewska
- Department of Human Genetics, McGill University, 1205 Avenue Docteur Penfield, N5/13,Montreal, Quebec, Canada H3A 1B1; E-Mails: (M.A.M.-G.); (D.S.R.)
- Department of Pediatrics, McGill University, Montreal, Quebec, Canada H3H 1P3
- McGill University Health Centre, 4060 Ste. Catherine West, PT 420, Montreal, Quebec, Canada H3Z 2Z3
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-514-412-4400 (ext. 23279); Fax: +1-514-412-4331
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19
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Determination of Methylenetetrahydrofolate Reductase (MTHFR) gene polymorphism in Turkish patients with nonsyndromic cleft lip and palate. Int J Pediatr Otorhinolaryngol 2013; 77:1143-6. [PMID: 23725631 DOI: 10.1016/j.ijporl.2013.04.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2013] [Revised: 04/09/2013] [Accepted: 04/12/2013] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To investigate the association between MTHFR C677T polymorphism and Turkish patients with nonsyndromic cleft lip and/or palate (nsCL/P) and to determine the prevalence of the Turkish population. PATIENTS AND METHODS Molecular analysis of gene polymorphisms were carried out using polymerase chain reactions and restriction enzyme digestions. In our study, 80 patients with nsCL/P and 125 unrelated individuals from Turkey were studied. RESULTS We found that MTHFR C677T polymorphism is a significant risk factor for nsCL/P in Turkey (p=0.0004). These results support the impact of MTHFR C677T polymorphism and importance of folic acid intake in the etiology of nsCL/P. CONCLUSIONS MTHFR gene which is localized in the relevant region of chromosome 1p36.3 not been studied Turkish patients with nsCL/P and the prevalence of our country not to be determined. We revealed statistically association between the MTHFR C677T gene polymorphism and nonsyndromic cleft lip and/or palate in the Turkish population.
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20
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Wang B, Liu M, Yan W, Mao J, Jiang D, Li H, Chen Y. Association of SNPs in genes involved in folate metabolism with the risk of congenital heart disease. J Matern Fetal Neonatal Med 2013; 26:1768-77. [DOI: 10.3109/14767058.2013.799648] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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21
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Ouyang S, Liu Z, Li Y, Wu J. Meta-analyses on the association of MTR A2756G and MTRR A66G polymorphisms with neural tube defect risks in Caucasian children. J Matern Fetal Neonatal Med 2013; 26:1166-70. [PMID: 23425389 DOI: 10.3109/14767058.2013.777699] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVE Methionine synthase (MTR) and MTR reductase (MTRR) genes have been considered to be implicated in the development of neural tube defects (NTDs). The associations between MTR A2756G and MTRR A66G polymorphisms and NTD risk in children have been investigated in many studies. However, results are inconsistent. Accordingly, we conducted meta-analyses to further investigate such associations. METHODS Published literatures were obtained from PubMed and Embase databases. All studies evaluating the association between MTR A2756G or MTRR A66G polymorphism and infant NTDs were included. Pooled odds ratio with a 95% confidence interval was calculated using fixed or random-effects model. RESULTS A total of 13 studies (1298 cases and 2237 controls) on MTR A2756G polymorphism and 10 studies (1358 cases and 2169 controls) on MTRR A66G polymorphism were included. Meta-analyses reveal no significant association of MTR A2756G and MTRR A66G polymorphisms with risk for NTDs in Caucasian children in either the genetic model or allele model. CONCLUSIONS The present meta-analyses indicate that MTR A2756G and MTRR A66G polymorphism are not associated with NTD risks in Caucasian children.
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Affiliation(s)
- Shengrong Ouyang
- Department of Biochemistry, Capital Institute of Pediatrics, Beijing 100020, China
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22
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Rosenquist TH. Folate, Homocysteine and the Cardiac Neural Crest. Dev Dyn 2013; 242:201-18. [DOI: 10.1002/dvdy.23922] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Revised: 12/21/2012] [Accepted: 12/21/2012] [Indexed: 12/21/2022] Open
Affiliation(s)
- Thomas H. Rosenquist
- Department of Genetics; Cell Biology and Anatomy; University of Nebraska Medical Center; Omaha; Nebraska
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23
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Ouyang S, Li Y, Liu Z, Chang H, Wu J. Association between MTR A2756G and MTRR A66G polymorphisms and maternal risk for neural tube defects: A meta-analysis. Gene 2013; 515:308-12. [DOI: 10.1016/j.gene.2012.11.070] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2012] [Revised: 07/13/2012] [Accepted: 11/29/2012] [Indexed: 01/16/2023]
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Biselli JM, Zampieri BL, Goloni-Bertollo EM, Haddad R, Fonseca MFR, Eberlin MN, Vannucchi H, Carvalho VM, Pavarino EC. Genetic polymorphisms modulate the folate metabolism of Brazilian individuals with Down syndrome. Mol Biol Rep 2012; 39:9277-84. [PMID: 22903356 DOI: 10.1007/s11033-012-1629-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Accepted: 04/16/2012] [Indexed: 12/01/2022]
Abstract
Individuals with Down syndrome (DS) carry three copies of the Cystathionine β-synthase (CβS) gene. The increase in the dosage of this gene results in an altered profile of metabolites involved in the folate pathway, including reduced homocysteine (Hcy), methionine, S-adenosylhomocysteine (SAH) and S-adenosylmethionine (SAM). Furthermore, previous studies in individuals with DS have shown that genetic variants in genes involved in the folate pathway influence the concentrations of this metabolism's products. The purpose of this study is to investigate whether polymorphisms in genes involved in folate metabolism affect the plasma concentrations of Hcy and methylmalonic acid (MMA) along with the concentration of serum folate in individuals with DS. Twelve genetic polymorphisms were investigated in 90 individuals with DS (median age 1.29 years, range 0.07-30.35 years; 49 male and 41 female). Genotyping for the polymorphisms was performed either by polymerase chain reaction (PCR) based techniques or by direct sequencing. Plasma concentrations of Hcy and MMA were measured by liquid chromatography-tandem mass spectrometry as previously described, and serum folate was quantified using a competitive immunoassay. Our results indicate that the MTHFR C677T, MTR A2756G, TC2 C776G and BHMT G742A polymorphisms along with MMA concentration are predictors of Hcy concentration. They also show that age and Hcy concentration are predictors of MMA concentration. These findings could help to understand how genetic variation impacts folate metabolism and what metabolic consequences these variants have in individuals with trisomy 21.
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Affiliation(s)
- J M Biselli
- Departamento de Biologia Molecular, Faculdade de Medicina de São José do Rio Preto (FAMERP), Unidade de Pesquisa em Genética e Biologia Molecular (UPGEM), Av. Brigadeiro Faria Lima, n.o 5416-Bloco U-6, São José do Rio Preto, SP, CEP: 15.090-000, Brazil
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25
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Wang XW, Luo YL, Wang W, Zhang Y, Chen Q, Cheng YL. Association between MTHFR A1298C polymorphism and neural tube defect susceptibility: a metaanalysis. Am J Obstet Gynecol 2012; 206:251.e1-7. [PMID: 22265089 DOI: 10.1016/j.ajog.2011.12.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Revised: 11/29/2011] [Accepted: 12/19/2011] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To determine whether 5,10-methylenetetrahydrofolate reductase A1298C polymorphism is associated with neural tube defect susceptibility. STUDY DESIGN Computerized literature searches of the PubMed, Embase, and Medline database were conducted to identify all eligible articles. Study subjects were classified as neural tube defect patients, mothers with neural tube defect offspring and fathers with neural tube defect offspring. The pooled odds ratios with 95% confidence interval (CI) were calculated by fixed-effects model or random-effects model. RESULTS Twenty-three case-control studies were finally included. The pooled results showed no significant association between 5,10-methylenetetrahydrofolate reductase A1298C polymorphism and neural tube defect susceptibility in any genetic contrast among the 3 groups, except 1 (AC vs AA in neural tube defect patients: odds ratio, 1.16; 95% CI, 1.10-1.32; P = .03), which, however, turned out to be of no statistical significance in the subgroup of the white population (odds ratio, 1.14; 95% CI, 0.98-1.31; P = .08). CONCLUSION This metaanalysis suggests that 5,10-methylenetetrahydrofolate reductase A1298C polymorphism is not associated with neural tube defect susceptibility in the white population.
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German JB, Zivkovic AM, Dallas DC, Smilowitz JT. Nutrigenomics and personalized diets: What will they mean for food? Annu Rev Food Sci Technol 2012; 2:97-123. [PMID: 22129377 DOI: 10.1146/annurev.food.102308.124147] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The modern food system feeds six billion people with remarkable diversity, safety, and nutrition. Yet, the current rise in diet-related diseases is compromising health and devaluing many aspects of modern agriculture. Steps to increase the nutritional quality of individual foods will assist in personalizing health and in guiding individuals to achieve superior health. Nutrigenomics is the scientific field of the genetic basis for varying susceptibilities to disease and the diverse responses to foods. Although some of these genetic determinants will be simple and amenable to personal genotyping as the means to predict health, in practice most will not. As a result, genotyping will not be the secret to personalizing diet and health. Human assessment technologies from imaging to proteomics and metabolomics are providing tools to both understand and accurately assess the nutritional phenotype of individuals. The business models are also emerging to bring these assessment capabilities to industrial practice, in which consumers will know more about their personal health and seek personal solutions.
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Affiliation(s)
- J Bruce German
- Foods for Health Institute, University of California, Davis, California 95616, USA
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Abstract
The vitamin folate functions within the cell as a carrier of one-carbon units. The requirement for one-carbon transfers is ubiquitous and all mammalian cells carry out folate dependent reactions. In recent years, low folate status has been linked to risk of numerous adverse health conditions throughout life from birth defects and complications of pregnancy to cardiovascular disease, cancer and cognitive dysfunction in the elderly. In many instances inadequate intake of folate seems to be the primary contributor but there is also evidence that an underlying genetic susceptibility can play a modest role by causing subtle alterations in the availability, metabolism or distribution of intermediates in folate related pathways. Folate linked one-carbon units are essential for DNA synthesis and repair and as a source of methyl groups for biological methylation reactions. The notion of common genetic variants being linked to risk of disease was relatively novel in 1995 when the first functional folate-related polymorphism was discovered. Numerous polymorphisms have now been identified in folate related genes and have been tested for functionality either as a modifier of folate status or as being associated with risk of disease. Moreover, there is increasing research into the importance of folate-derived one-carbon units for DNA and histone methylation reactions, which exert crucial epigenetic control over cellular protein synthesis. It is thus becoming clear that genetic aspects of folate metabolism are wide-ranging and may touch on events as disparate as prenatal imprinting to cancer susceptibility. This chapter will review the current knowledge in this area.
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Affiliation(s)
- Anne M Molloy
- School of Medicine, Trinity College Dublin, Dublin 2, Ireland,
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Folate and vitamin B12-related genes and risk for omphalocele. Hum Genet 2011; 131:739-46. [PMID: 22116453 DOI: 10.1007/s00439-011-1117-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Accepted: 11/14/2011] [Indexed: 10/15/2022]
Abstract
Both taking folic acid-containing vitamins around conception and consuming food fortified with folic acid have been reported to reduce omphalocele rates. Genetic factors are etiologically important in omphalocele as well; our pilot study showed a relationship with the folate metabolic enzyme gene methylenetetrahydrofolate reductase (MTHFR). We studied 169 non-aneuploid omphalocele cases and 761 unaffected, matched controls from all New York State births occurring between 1998 and 2005 to look for associations with single nucleotide polymorphisms (SNPs) known to be important in folate, vitamin B12, or choline metabolism. In the total study population, variants in the transcobalamin receptor gene (TCblR), rs2232775 (p.Q8R), and the MTHFR gene, rs1801131 (c.1298A>C), were significantly associated with omphalocele. In African-Americans, significant associations were found with SNPs in genes for the vitamin B12 transporter (TCN2) and the vitamin B12 receptor (TCblR). A SNP in the homocysteine-related gene, betaine-homocysteine S-methyltransferase (BHMT), rs3733890 (p.R239Q), was significantly associated with omphalocele in both African-Americans and Asians. Only the TCblR association in the total population remained statistically significant if Bonferroni correction was applied. The finding that transcobalamin receptor (TCblR) and transporter (TCN2) SNPs and a BHMT SNP were associated with omphalocele suggests that disruption of methylation reactions, in which folate, vitamin B12, and homocysteine play critical parts, may be a risk factor for omphalocele. Our data, if confirmed, suggest that supplements containing both folic acid and vitamin B12 may be beneficial in preventing omphaloceles.
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Bhaskar L, Murthy J, Venkatesh Babu G. Polymorphisms in genes involved in folate metabolism and orofacial clefts. Arch Oral Biol 2011; 56:723-37. [DOI: 10.1016/j.archoralbio.2011.01.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 01/18/2011] [Accepted: 01/18/2011] [Indexed: 11/24/2022]
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Pangilinan F, Mitchell A, VanderMeer J, Molloy AM, Troendle J, Conley M, Kirke PN, Sutton M, Sequeira JM, Quadros EV, Scott JM, Mills JL, Brody LC. Transcobalamin II receptor polymorphisms are associated with increased risk for neural tube defects. J Med Genet 2010; 47:677-85. [PMID: 20577008 DOI: 10.1136/jmg.2009.073775] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
OBJECTIVE Women who have low cobalamin (vitamin B(12)) levels are at increased risk for having children with neural tube defects (NTDs). The transcobalamin II receptor (TCblR) mediates uptake of cobalamin into cells. Inherited variants in the TCblR gene as NTD risk factors were evaluated. METHODS Case-control and family-based tests of association were used to screen common variation in TCblR as genetic risk factors for NTDs in a large Irish group. A confirmatory group of NTD triads was used to test positive findings. RESULTS 2 tightly linked variants associated with NTDs in a recessive model were found: TCblR rs2336573 (G220R; p(corr)=0.0080, corrected for multiple hypothesis testing) and TCblR rs9426 (p(corr)=0.0279). These variants were also associated with NTDs in a family-based test before multiple test correction (log-linear analysis of a recessive model: rs2336573 (G220R; RR=6.59, p=0.0037) and rs9426 (RR=6.71, p=0.0035)). A copy number variant distal to TCblR and two previously unreported exonic insertion-deletion polymorphisms were described. CONCLUSIONS TCblR rs2336573 (G220R) and TCblR rs9426 represent a significant risk factor in NTD cases in the Irish population. The homozygous risk genotype was not detected in nearly 1000 controls, indicating that this NTD risk factor may be of low frequency and high penetrance. 9 other variants are in perfect linkage disequilibrium with the associated single nucleotide polymorphisms. Additional work is required to identify the disease-causing variant. Our data suggest that variation in TCblR plays a role in NTD risk and that these variants may modulate cobalamin metabolism.
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Affiliation(s)
- F Pangilinan
- Molecular Pathogenesis Section, Genome Technology Branch, National Human Genome Research Institute, 50 South Drive, Bethesda, MD 20892-8004, USA
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Steinlein OK. Gene polymorphisms and their role in epilepsy treatment and prognosis. Naunyn Schmiedebergs Arch Pharmacol 2010; 382:109-18. [PMID: 20556360 DOI: 10.1007/s00210-010-0531-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2010] [Accepted: 05/27/2010] [Indexed: 12/16/2022]
Abstract
The human genome carries an enormous number of genetic variants, many of them of functional consequence. In epilepsy, they are likely to be involved in drug-specific treatment efficacy, unwanted or even toxic drug reactions, teratogenic risks in pregnancy as well as in the long-term prognosis of patients with epilepsy. As in many other disorders with a complex genetic background, the associated genetic variants that could be verified successfully in replication studies are still only a few. However, new techniques and improved research strategies are likely to increase their number in the foreseeable future, although at a much slower pace as initially expected.
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Affiliation(s)
- Ortrud K Steinlein
- Institute of Human Genetics, University Hospital, Ludwig-Maximilians-University of Munich, Goethestr. 29, 80336, Munich, Germany.
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Transcobalamin C776G genotype modifies the association between vitamin B12 and homocysteine in older Hispanics. Eur J Clin Nutr 2010; 64:503-9. [PMID: 20216556 PMCID: PMC2864787 DOI: 10.1038/ejcn.2010.20] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Background A common polymorphism, C776G, in the plasma B12 transport protein transcobalamin (TC), encodes for either proline or arginine at codon 259. This polymorphism may affect the affinity of TC for B12 and subsequent delivery of B12 to tissues. Methods TC genotype and its associations with indicators of B12 status, including total B12, holotranscobalamin (holoTC), methylmalonic acid, and homocysteine, were evaluated in a cohort of elderly Latinos (N=554, age 60–93y) from the Sacramento Area Latino Study on Aging (SALSA). Results The distribution of TC genotypes was 41.3% homozygous reference (776CC) and 11.6% homozygous variant (776GG). No differences between the homozygous genotypes were observed in total B12, holoTC, methylmalonic acid, or homocysteine. The holoTC/total B12 ratio was lower in the 776GG group compared with the 776CC group (p=0.04). Significant interactions of TC genotype with total B12 (p=0.04) and with holoTC (p≤0.03) were observed such that mean homocysteine concentrations and the odds ratios for hyperhomocysteinemia (>13 µmol/L) were higher in the 776CC subjects compared with all carriers of the G allele (776CG and 776GG combined) when total B12 (<156 pmol/L) or holoTC (<35 pmol/L) were low. Conclusions This population of older Latinos has a lower prevalence of the TC 776GG variant than reported for Caucasian populations. The association between vitamin B12 and homocysteine concentrations is modified by TC 776 genotype. It remains to be determined if the TC C776G polymorphism has a significant effect on the hematological and neurological manifestations of B12 deficiency or on vascular and other morbidities associated with hyperhomocysteinemia.
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Joó JG. [Recent perspectives on the development of the central nervous system and the genetic background of neural tube defects]. Orv Hetil 2009; 150:873-82. [PMID: 19403431 DOI: 10.1556/oh.2009.28564] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Neural tube defects are rare and mostly lethal malformations. The pattern of inheritance of these malformations is multifactorial, rendering the identification of the underlying causes. Numerous studies have been conducted to elucidate the genetic basis of the development of the central nervous system. Essential signaling pathways of the development of the central nervous system include the planar cell polarity pathway, which is important for the initiation of neural tube closure as well as sonic hedgehog pathway, which regulates the neural plate bending. Genes and their mutations influencing the different stages of neurulation have been investigated for their eventual role in the development of these malformations. Among the environmental factors, folic acid seems to be the most important modifier of the risk of human neural tube defects. Genes of the folate metabolism pathways have also been investigated to identify mutations resulting in increased risk of NTDs. In this review the author has attempted to summarize the knowledge on neural tube defects, with special regard to genetic factors of the etiology.
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Affiliation(s)
- József Gábor Joó
- Semmelweis Egyetem, Altalános Orvostudományi Kar I. Szülészeti és Nogyógyászati Klinika Budapest Baross utca 27. 1088.
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Joó JG. Recent perspectives on the genetic background of neural tube defects with special regard to iniencephaly. Expert Rev Mol Diagn 2009; 9:281-93. [PMID: 19379086 DOI: 10.1586/erm.09.4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Iniencephaly is a rare and mostly lethal type of neural tube defect. The pattern of inheritance of this group of malformations is multifactorial, rendering the identification of the underlying causes. Numerous studies have been conducted to elucidate the genetic basis of human neurulation. Essential signaling pathways of the development of the CNS include the planar cell polarity pathway, which is important for the initiation of neural tube closure, as well as the sonic hedgehog pathway, which regulates the neural plate bending. Genes influencing the different stages of neurulation have been investigated for their eventual role in the development of these malformations. Among the environmental factors, folic acid seems to be the most important modifier of the risk of human neural tube defects. Genes of the folate metabolism pathways have also been investigated to identify mutations resulting in increased risk of neural tube defects. In this review we have attempted to summarize the knowledge on iniencephaly and neural tube defects, with special regard to genetic factors of the etiology.
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Affiliation(s)
- József Gábor Joó
- 1st Department of Obstetrics and Gynecology, Faculty of General Medicine, Semmelweis University, 1088 Budapest, Baross utca 27, Hungary.
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