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Unadkat SV, Padhi BK, Bhongir AV, Gandhi AP, Shamim MA, Dahiya N, Satapathy P, Rustagi S, Khatib MN, Gaidhane A, Zahiruddin QS, Sah R, Serhan HA. Association between homocysteine and coronary artery disease-trend over time and across the regions: a systematic review and meta-analysis. Egypt Heart J 2024; 76:29. [PMID: 38409614 PMCID: PMC10897093 DOI: 10.1186/s43044-024-00460-y] [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: 12/16/2023] [Accepted: 02/21/2024] [Indexed: 02/28/2024] Open
Abstract
BACKGROUND The association of homocysteine with coronary artery disease (CAD) has been explored previously with mixed findings. The present Systematic Review and Meta-Analysis (SRMA) has assessed the pooled estimate of association between homocysteine (Hcy) and CAD, and its variation over the period and geography. METHODS Systematic literature search was done in PubMed, Scopus and Cochrane to identify the observational studies that have reported mean Hcy among cases (CAD) and control. The SRMA was registered in PROSPERO (ID-CRD42023387675). RESULTS Pooled standardized mean difference (SMD) of Hcy levels between the cases and controls was 0.73 (95% CI 0.55-0.91) from 59 studies. Heterogeneity was high (I2 94%). The highest SMD was found among the Asian studies (0.85 [95% CI 0.60-1.10]), while the European studies reported the lowest SMD between the cases and controls (0.32 [95% CI 0.18-0.46]). Meta-regression revealed that the strength of association was increasing over the years (Beta = 0.0227, p = 0.048). CONCLUSIONS Higher homocysteine levels might have a significant association with coronary artery diseases, but the certainty of evidence was rated low, owing to the observational nature of the studies, high heterogeneity, and publication bias. Within the population groups, Asian and African populations showed a greater strength of association than their European and American counterparts, and it also increased over the years.
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Affiliation(s)
- Sumit V Unadkat
- Department of Community Medicine, M. P. Shah Government Medical College, Jamnagar, Gujarat, India
| | - Bijaya K Padhi
- Department of Community Medicine and School of Public Health, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Aparna Varma Bhongir
- Department of Biochemistry, All India Institute of Medical Sciences, Bibinagar, Hyderabad, India
| | - Aravind P Gandhi
- Department of Community Medicine, All India Institute of Medical Sciences, Nagpur, 441108, India.
| | - Muhammad Aaqib Shamim
- Department of Pharmacology, All India Institute of Medical Sciences, Jodhpur, 342005, India
- Global Center for Evidence Synthesis, Chandigarh, 160036, India
| | - Neelam Dahiya
- Department of Cardiology, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Prakasini Satapathy
- Center for Global Health Research, Saveetha Medical College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India
- School of Pharmacy, Graphic Era Hill University, Dehradun, 248001, India
| | - Sarvesh Rustagi
- School of Applied and Life Sciences, Uttaranchal University, Dehradun, Uttarakhand, India
| | - Mahalaqua Nazli Khatib
- Division of Evidence Synthesis, Global Consortium of Public Health and Research, DMIHER, Wardha, India
| | - Abhay Gaidhane
- Jawaharlal Nehru Medical College, One Health Centre (COHERD), Datta Meghe Institute of Higher Education, Wardha, India
| | - Quazi Syed Zahiruddin
- Division of Evidence Synthesis, School of Epidemiology and Public Health and Research, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education, Wardha, India
| | - Ranjit Sah
- Tribhuvan University Teaching Hospital, Kathmandu, 46000, Nepal
- Department of Clinical Microbiology, DY Patil Medical College, Hospital and Research Centre, DY Patil Vidyapeeth, Pune, 411000, Maharashtra, India
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Lan C, Huang Z, Luo X, Zhang Y. The Correlations Between Serum Hcy Level and Seizures and Cognitive Function in Patients After Stroke. Am J Alzheimers Dis Other Demen 2022; 37:15333175221146738. [PMID: 36541875 PMCID: PMC10581107 DOI: 10.1177/15333175221146738] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUNDS Post-stroke cognitive dysfunction (PSCI), a set of illnesses ranging from moderate cognitive impairment to dementia, which is one of the most prevalent consequences following a stroke. Homocysteine (Hcy) has been related to a number of neurological and systemic diseases. It's also a known risk factor for cardiovascular disease and systemic atherosclerosis (CVD). The link between Hcy and PSCI, on the other hand, is unknown. METHODS Our hospital evaluated 325 patients with acute cerebral infarction between January 1, 2018 and December 1, 2021. There are biological markers and baseline data available. Patients were divided into two groups based on the results of the Montreal Cognitive Assessment (MoCA). The researchers performed logistic regression analysis to find variables that may be linked to PSCI. RESULTS HCY levels were significantly higher in PSCI patients than in non-PSCI patients. Age, education, seizure manifestation, and income level were all shown to be independent risk variables for PSCI in a multivariate logistic analysis. Hcy levels in PSCI patients differed considerably between the high and low groups. The high and low Hcy levels groups had significantly varied hypertension histories and urine levels. Hcy levels in PSCI patients differed considerably between the high and low groups. The high and low Hcy levels groups had significantly varied hypertension histories and urine levels. CONCLUSION Serum Hcy levels have been linked to PSCI in post-stroke patients, and researchers believe that serum Hcy levels will diminish PSCI.
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Affiliation(s)
- Chen Lan
- Jinggangshan University, Ji’an, China
- Neurology Department, Affiliated Hospital of Jinggangshan University, Ji’an, China
| | - Zhiqiang Huang
- Neurology Department, Affiliated Hospital of Jinggangshan University, Ji’an, China
| | - Xinxin Luo
- Neurology Department, Affiliated Hospital of Jinggangshan University, Ji’an, China
| | - Yongcheng Zhang
- Neurology Department, Affiliated Hospital of Jinggangshan University, Ji’an, China
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Kumar A, Sharma R, Misra S, Nath M, Kumar P. Relationship between methylenetetrahydrofolate reductase (MTHFR) gene (A1298C) polymorphism with the risk of stroke: A systematic review and meta-analysis. Neurol Res 2020; 42:913-922. [PMID: 32727306 DOI: 10.1080/01616412.2020.1798107] [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] [Indexed: 01/11/2023]
Abstract
Studies on relationship between methylenetetrahydrofolate reductase gene (MTHFR) gene A1298C polymorphism with the risk of ischemic as well as hemorrhagic stroke have shown discordant results. Present meta-analysis was aimed to clarify the relationship between MTHFR gene A1298C polymorphism with risk of stroke. A comprehensive literature search for all published articles was performed in electronic database including PubMed, EMbase, Cochrane Library, Trip Databases, Worldwide Science, CINAHL, and Google Scholar up to 31st December 2019. Pooled odds ratio (ORs) with 95% confidence interval (CIs) under dominant, recessive, and allelic models was calculated. Sensitivity analysis was also performed to detect the heterogeneity. In our meta-analysis, a total of 20 studies with 19 case control studies involving 2871 ischemic stroke (IS) cases and 3984 controls and 3 studies with 201 hemorrhagic stroke cases and 1349 controls were included. Our findings suggest that there was a significant relationship between MTHFR gene A1298C gene polymorphism with risk of ischemic stroke (dominant model: OR = 1.32, 95% CI = 1.06-1.66, recessive model: OR = 1.45, 95% CI = 1.06-1.99 and allelic model: OR = 1.35, 95% CI = 1.00-1.84, respectively). However, no significant relationship between MTHFR gene A1298C gene polymorphism with the risk of hemorrhagic stroke. Findings of this meta-analysis concludes that MTHFR gene A1298 C polymorphism could be capable of increasing stroke susceptibility in Asian, but not in Caucasian population. Genotyping of MTHFR gene A1298C polymorphism may be used as a predictor for the occurrence of ischemic stroke.
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Affiliation(s)
- Amit Kumar
- Department of Pediatrics, Army Hospital Research and Referral , New Delhi, India
| | - Rakhee Sharma
- Department of Pediatrics, Army Hospital Research and Referral , New Delhi, India
| | - Shubham Misra
- Department of Neurology, All India Institute of Medical Sciences , New Delhi, India
| | - Manabesh Nath
- Department of Neurology, All India Institute of Medical Sciences , New Delhi, India
| | - Pradeep Kumar
- Department of Neurology, All India Institute of Medical Sciences , New Delhi, India
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Subclinical inflammation, telomere shortening, homocysteine, vitamin B6, and mortality: the Ludwigshafen Risk and Cardiovascular Health Study. Eur J Nutr 2019; 59:1399-1411. [PMID: 31129702 PMCID: PMC7230054 DOI: 10.1007/s00394-019-01993-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 05/07/2019] [Indexed: 01/08/2023]
Abstract
Purpose Short telomeres and B vitamin deficiencies have been proposed as risk factors for age-related diseases and mortality that interact through oxidative stress and inflammation. However, available data to support this concept are insufficient. We aimed to investigate the predictive role of B vitamins and homocysteine (HCY) for mortality in cardiovascular patients. We explored potential relationships between HCY, B vitamins, relative telomere length (RTL), and indices of inflammation. Methods Vitamin B6, HCY, interleukin-6 (IL-6), high-sensitive-C-reactive protein (hs-CRP), and RTL were measured in participants of the Ludwigshafen Risk and Cardiovascular Health Study. Death events were recorded over a median follow-up of 9.9 years. Results All-cause mortality increased with higher concentrations of HCY and lower vitamin B6. Patients in the 4th quartile of HCY and vitamin B6 had hazard ratios (HR) for all-cause mortality of 2.77 (95% CI 2.28–3.37) and 0.41(95% CI 0.33–0.49), respectively, and for cardiovascular mortality of 2.78 (95% CI 2.29–3.39) and 0.40 (95% CI 0.33–0.49), respectively, compared to those in the 1st quartile. Multiple adjustments for confounders did not change these results. HCY and vitamin B6 correlated with age-corrected RTL (r = − 0.086, p < 0.001; r = 0.04, p = 0.031, respectively), IL-6 (r = 0.148, p < 0.001; r = − 0.249, p < 0.001, respectively), and hs-CRP (r = 0.101, p < 0.001; r = − 0.320, p < 0.001, respectively). Subjects with the longest telomeres had a significantly higher concentration of vitamin B6, but lower concentrations of HCY, IL-6, and hs-CRP. Multiple regression analyses identified HCY as an independent negative predictor of age-corrected RTL. Conclusions In conclusion, hyperhomocysteinemia and vitamin B6 deficiency are risk factors for death from any cause. Hyperhomocysteinemia and vitamin B6 deficiency correlate with increased mortality. This correlation might, at least partially, be explained by accelerated telomere shortening induced by oxidative stress and systemic inflammation in these circumstances. Electronic supplementary material The online version of this article (10.1007/s00394-019-01993-8) contains supplementary material, which is available to authorized users.
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Kumar A, Palfrey HA, Pathak R, Kadowitz PJ, Gettys TW, Murthy SN. The metabolism and significance of homocysteine in nutrition and health. Nutr Metab (Lond) 2017; 14:78. [PMID: 29299040 PMCID: PMC5741875 DOI: 10.1186/s12986-017-0233-z] [Citation(s) in RCA: 189] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 12/07/2017] [Indexed: 12/31/2022] Open
Abstract
An association between arteriosclerosis and homocysteine (Hcy) was first demonstrated in 1969. Hcy is a sulfur containing amino acid derived from the essential amino acid methionine (Met). Hyperhomocysteinemia (HHcy) was subsequently shown in several age-related pathologies such as osteoporosis, Alzheimer's disease, Parkinson's disease, stroke, and cardiovascular disease (CVD). Also, Hcy is associated with (but not limited to) cancer, aortic aneurysm, hypothyroidism and end renal stage disease to mention some. The circulating levels of Hcy can be increased by defects in enzymes of the metabolism of Met, deficiencies of vitamins B6, B12 and folate or by feeding Met enriched diets. Additionally, some of the pharmaceuticals currently in clinical practice such as lipid lowering, and anti-Parkinsonian drugs are known to elevate Hcy levels. Studies on supplementation with folate, vitamins B6 and B12 have shown reduction in Hcy levels but concomitant reduction in certain associated pathologies have not been definitive. The enormous importance of Hcy in health and disease is illustrated by its prevalence in the medical literature (e.g. > 22,000 publications). Although there are compelling data in favor of Hcy as a modifiable risk factor, the debate regarding the significance of Hcy mediated health effects is still ongoing. Despite associations between increased levels of Hcy with several pathologies being well documented, whether it is a causative factor, or an effect remains inconclusive. The present review though not exhaustive, is focused on several important aspects of Hcy metabolism and their relevance to health.
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Affiliation(s)
- Avinash Kumar
- Environmental Toxicology Department, Southern University and A&M College, Baton Rouge, LA 70813 USA
| | - Henry A. Palfrey
- Environmental Toxicology Department, Southern University and A&M College, Baton Rouge, LA 70813 USA
| | - Rashmi Pathak
- Environmental Toxicology Department, Southern University and A&M College, Baton Rouge, LA 70813 USA
| | - Philip J. Kadowitz
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA USA
| | - Thomas W. Gettys
- Laboratory of Nutrient Sensing and Adipocyte Signaling, Pennington Biomedical Research Center, Baton Rouge, LA USA
| | - Subramanyam N. Murthy
- Environmental Toxicology Department, Southern University and A&M College, Baton Rouge, LA 70813 USA
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Bickel C, Schnabel RB, Zengin E, Lubos E, Rupprecht H, Lackner K, Proust C, Tregouet D, Blankenberg S, Westermann D, Sinning C. Homocysteine concentration in coronary artery disease: Influence of three common single nucleotide polymorphisms. Nutr Metab Cardiovasc Dis 2017; 27:168-175. [PMID: 27773468 DOI: 10.1016/j.numecd.2016.09.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 08/20/2016] [Accepted: 09/05/2016] [Indexed: 11/20/2022]
Abstract
BACKGROUND AND AIMS Whether single nucleotide polymorphisms (SNPs) of homocysteine metabolism enzymes influence the rate of cardiovascular (CV) events in coronary artery disease (CAD) patients remains controversial. METHODS AND RESULTS In this analysis, 1126 subjects from the AtheroGene study with CAD and 332 control subjects without known CAD were included. The following SNPs were investigated: methylentetrahydrofolate reductase (MTHFR-C667T), methionin synthetase (MS-D919G), and cystathionin beta synthetase (CBS-I278T). The endpoint was the combination of cardiovascular death, stroke, and non-fatal myocardial infarction (N = 286). The median follow-up time was 6.4 years. Kaplan-Meier curve analysis showed an increasing event rate with rising homocysteine levels (p < 0.001) in CAD patients. Further, in Cox-Regression analysis homocysteine was a predictor of the endpoint with a hazard ratio (HR) of 6.5 (95% CI: 2.9-14.6, p < 0.001) in the adjusted model including cardiovascular risk factors. Of the three SNPs, homozygous MTHFR SNP increased homocysteine levels significantly in patients with CAD and individuals without CAD (both p < 0.001). The SNPs in MS and CBS were not related to relevant changes in homocysteine levels in CAD patients or controls. The different SNPs of MTHFR, MS, and CBS were not related to an increased event rate. CONCLUSION Homocysteine level is a strong predictor of CV events. Subjects with and without CAD and SNPs in the enzyme MTHFR had increased homocysteine levels. This was not observed for MS and CBS SNPs. Although MTHFR SNPs alter homocysteine levels in patients and controls, these polymorphisms had no impact on prognosis in CAD patients.
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Affiliation(s)
- C Bickel
- Department of Internal Medicine, Federal Armed Forces Central Hospital, Koblenz, Germany
| | - R B Schnabel
- Department of General and Interventional Cardiology, University Heart Center Hamburg, Hamburg, Germany
| | - E Zengin
- Department of General and Interventional Cardiology, University Heart Center Hamburg, Hamburg, Germany
| | - E Lubos
- Department of General and Interventional Cardiology, University Heart Center Hamburg, Hamburg, Germany
| | - H Rupprecht
- Department of Medicine II, GPR Rüsselsheim, Rüsselsheim, Germany
| | - K Lackner
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - C Proust
- ICAN Institute for Cardiometabolism and Nutrition, Paris, France; Sorbonne Universités, UPMC Univ. Paris 06, INSERM, UMR_S 1166, Team Genomics & Pathophysiology of Cardiovascular Diseases, Paris, France
| | - D Tregouet
- ICAN Institute for Cardiometabolism and Nutrition, Paris, France; Sorbonne Universités, UPMC Univ. Paris 06, INSERM, UMR_S 1166, Team Genomics & Pathophysiology of Cardiovascular Diseases, Paris, France
| | - S Blankenberg
- Department of General and Interventional Cardiology, University Heart Center Hamburg, Hamburg, Germany
| | - D Westermann
- Department of General and Interventional Cardiology, University Heart Center Hamburg, Hamburg, Germany
| | - C Sinning
- Department of General and Interventional Cardiology, University Heart Center Hamburg, Hamburg, Germany.
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Kucukhuseyin O, Kurnaz O, Akadam-Teker AB, Isbir T, Bugra Z, Ozturk O, Yilmaz-Aydogan H. The association of MTHFR C677T gene variants and lipid profiles or body mass index in patients with diabetic and nondiabetic coronary heart disease. J Clin Lab Anal 2014; 27:427-34. [PMID: 24218123 DOI: 10.1002/jcla.21623] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 04/09/2013] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND The aim of this study is to investigate whether methylenetetrahydrofolate reductase (MTHFR) C677T mutation is associated with the development of hyperlipoproteinemia and obesity in coronary heart disease (CHD). METHODS This study was carried out in 82 diabetic and 112 nondiabetic patients with CHD and in 138 CHD-free healthy controls. Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and agarose gel electrophoresis techniques were used to determine the MTHFR C677T. RESULTS Distributions of MTHFR genotypes (C677T dbSNP: rs1801133) were similar in our study groups (P > 0.05). There was no statistical association between biochemical parameters and genotype distribution in nondiabetic CHD patients, while diabetic CC genotype carriers have elevated levels of body mass index (BMI) independently from lipid profiles (P = 0.002). In diabetic CHD patients, while evaluating the clinical parameters according to gender, it was found that gender had an impact on BMI (P = 0.013). Due to this gender effect, a multivariate analysis was conducted on the diabetic CHD patient group. The multivariate logistic regression analysis confirmed that the MTHFR-CC genotype was associated with elevated BMI levels in diabetic CHD patients (odds ratio [OR] = 5.42, P = 0.003). CONCLUSION The results of the present study demonstrated that possessing T allele of MTHFR C677T mutation indicates a protective association on BMI independently from other risk factors.
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Affiliation(s)
- Ozlem Kucukhuseyin
- Department of Molecular Medicine, The Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
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Akcali C, Buyukcelik B, Kirtak N, Inaloz S. Clinical and laboratory parameters associated with metabolic syndrome in Turkish patients with psoriasis. J Int Med Res 2014; 42:386-94. [PMID: 24445696 DOI: 10.1177/0300060513502891] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVES To assess clinical and laboratory parameters associated with metabolic syndrome in Turkish patients with moderate or severe plaque-type psoriasis and nonpsoriatic controls. METHODS Patients with moderate or severe plaque psoriasis (patient group) or with nonpsoriatic dermatological disease (controls) were included. Waist circumference, weight, height and arterial blood pressure were measured, together with fasting blood glucose, triglyceride, high density lipoprotein (HDL), fibrinogen, homocysteine and adiponectin levels. Metabolic syndrome was diagnosed using National Cholesterol Education Program-Adult Treatment Panel III criteria. RESULTS Out of 90 patients (50 with psoriasis; 40 controls), metabolic syndrome was more frequent in the patient group than in controls. In terms of metabolic syndrome parameters, only hypertension was more frequent in patients with psoriasis compared with controls. There was no statistically significant difference between the patient and control groups for obesity, hypertriglyceridaemia, HDL levels or hyperglycaemia. Fibrinogen levels were increased and adiponectin levels were decreased in the psoriasis group. No between-group difference in homocysteine levels was found. CONCLUSION In this small study, metabolic syndrome was found to be more frequently identified in Turkish patients with psoriasis than in controls; metabolic syndrome could lead to increased cardiovascular disease risk in patients with moderate to severe psoriasis.
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Affiliation(s)
- Cenk Akcali
- Department of Dermatology, School of Medicine, Research and Trainign Hospital, Gaziantep University, Gaziantep, Turkey
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Chai GS, Jiang X, Ni ZF, Ma ZW, Xie AJ, Cheng XS, Wang Q, Wang JZ, Liu GP. Betaine attenuates Alzheimer-like pathological changes and memory deficits induced by homocysteine. J Neurochem 2013; 124:388-96. [PMID: 23157378 DOI: 10.1111/jnc.12094] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Revised: 11/06/2012] [Accepted: 11/06/2012] [Indexed: 11/27/2022]
Abstract
Hyperhomocysteinemia (Hhcy) may induce memory deficits with β-amyloid (Aβ) accumulation and tau hyperphosphorylation. Simultaneous supplement of folate and vitamin B12 partially restored the plasma homocysteine level and attenuated tau hyperphosphorylation, Aβ accumulation and memory impairments induced by Hhcy. However, folate and vitamin B12 treatment have no effects on Hhcy which has the methylenetetrahydrofolate reductase genotype mutation. In this study, we investigated the effects of simultaneous supplement of betaine on Alzheimer-like pathological changes and memory deficits in hyperhomocysteinemic rats after a 2-week induction by vena caudalis injection of homocysteine (Hcy). We found that supplementation of betaine could ameliorate the Hcy-induced memory deficits, enhance long-term potentiation (LTP) and increase dendritic branches numbers and the density of the dendritic spines, with up-regulation of NR1, NR2A, synaptotagmin, synaptophysin, and phosphorylated synapsin I protein levels. Supplementation of betaine also attenuated the Hcy-induced tau hyperphosphorylation at multiple AD-related sites through activation protein phosphatase-2A (PP2A) with decreased inhibitory demethylated PP2A(C) at Leu309 and phosphorylated PP2A(C) at Tyr307. In addition, supplementation of betaine also decreased Aβ production with decreased presenilin-1 protein levels. Our data suggest that betaine could be a promising candidate for arresting Hcy-induced AD-like pathological changes and memory deficits.
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Affiliation(s)
- Gao-Shang Chai
- Department of Pathophysiology, Key Laboratory of Neurological Diseases of Chinese Ministry of Education, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Jiang S, Zhao R, Pan M, Venners SA, Zhong G, Hsu YH. Associations of MTHFR and MTRR polymorphisms with serum lipid levels in Chinese hypertensive patients. Clin Appl Thromb Hemost 2012. [PMID: 23188888 DOI: 10.1177/1076029612467226] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To examine the effects of the methylenetetrahydrofolate reductase (MTHFR) and methionine synthase reductase (MTRR) gene polymorphisms and their interactions with environmental factors on serum lipid levels. METHODS We investigated totally 340 patients with essential hypertension, from Dongzhi community, Anhui, China. High-throughput TaqMan allelic discrimination assay was used for the genotyping of MTHFR C677T (Ala222Val), MTHFR A1298C (Glu429Ala), MTRR A66G (Ile22Met), and MTRR His595Tyr. RESULTS Compared with the MTRR 66AA genotype carriers, the GG genotype carriers had lower serum total cholesterol (TC) levels (adjusted β ± standard error [SE]: -0.5 ± 0.2 mmol/L; P = .003) and low-density lipoprotein cholesterol (LDL-C) levels (adjusted β ± SE: -0.4 ± 0.2 mmol/L; P = .005). Their false discovery rate (FDR)-adjusted P values were 0.056 and 0.056, respectively. We further found that there was a statistically significant interaction between 677TT genotype and sex in their associations with LDL levels (P interaction = .020), and significant interaction between 677TT genotype and smoking on LDL levels (P interaction = .036). A similar pattern of interaction was found between 66GG and drinking on levels of TC (P interaction = .034) and LDL (P interaction = .020). However, there were no significant interactions observed after FDR adjustment. CONCLUSION Both MTHFR and MTRR gene polymorphisms could be important genetic determinants of serum lipid levels in Chinese patients with hypertension. These findings need to be replicated in a larger sample.
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Affiliation(s)
- Shanqun Jiang
- 1School of Life Sciences, Anhui University, Hefei, China
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Murthy SN, Matta AS, Mondal D, McNamara DB. Methods in assessing homocysteine metabolism. Metab Syndr Relat Disord 2012; 1:129-40. [PMID: 18370634 DOI: 10.1089/154041903322294452] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Homocysteine, a sulfur-containing amino acid, is a metabolite of the essential amino acid methionine. High blood levels of homocysteine result in far-reaching biochemical and life-threatening consequences. Homocysteine exists at a critical biochemical intersection in the methionine cycle between S-adenosylmethionine, the ubiquitous methyl donor, and vitamins B(12) and folic acid. Indirect and direct vascular damage can be caused by homocysteine, a putative atherothrombotic risk factor. Homocysteine has been associated with vascular disease, particularly in subjects with significant carotid stenosis. Increasing evidence for a connection between homocysteine metabolism and cognitive function is surfacing, and this includes from mild cognitive decline (age-related memory loss) to vascular dementia and Alzheimer's disease. In the elderly population increase in homocysteine is commonly seen due to significant deficiencies in cobalamin (B(12)), folate and vitamin B(6.) All of these disease associations are thought to be interrelated via increased homocysteine and S-adenosylhomocysteine and subsequent hypomethylation of numerous substances, including DNA and proteins, rendering vascular structures more susceptible to damage. Decreasing plasma homocysteine, by providing nutritional cofactors for its metabolism has been shown to reduce the risk of cardiovascular events. The current methods of evaluation of homocysteine metabolism include assessment of cobalamin (B(12)) and folate and vitamin B(6) status and screening for mutations in the genes encoding the enzymes of metabolism. An accurate method for the estimation of plasma and tissue levels of homocysteine would contribute greatly to a proper understanding of the metabolism. In the current review emphasis will be on the estimation of homocysteine, and evaluation of one of the common mutations encountered in the metabolism of this amino acid.
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Affiliation(s)
- Subramanyam N Murthy
- Department of Medicine, Section of Endocrinology, Tulane University Health Sciences Center, New Orleans, Louisiana
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Pan F, Tian J, Zhang Y, Pan Y. Three genetic polymorphisms of homocysteine-metabolizing enzymes and risk of coronary heart disease: appraisal of a recent meta-analysis. DNA Cell Biol 2011; 31:135-8. [PMID: 22087541 DOI: 10.1089/dna.2011.1481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Kanth VVR, Golla JP, Sastry BKS, Naik S, Kabra N, Sujatha M. Genetic interactions between MTHFR (C677T), methionine synthase (A2756G, C2758G) variants with vitamin B12 and folic acid determine susceptibility to premature coronary artery disease in Indian population. J Cardiovasc Dis Res 2011; 2:156-63. [PMID: 22022143 PMCID: PMC3195194 DOI: 10.4103/0975-3583.85262] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Background: Researchers have determined that Indians face a higher risk of heart disease, despite the fact that nearly half of them are vegetarians and lack many of the other traditional risk factors. In the below-30 age group, coronary artery disease mortality among Indians is three-fold higher than in the whites in United Kingdom and ten-fold higher than the Chinese in Singapore. High levels of homocysteine have been widely linked to the early onset of heart diseases in other populations, although a definite proof among Indians is lacking, which needs to be investigated by way of screening for factors responsible for high homocysteine levels. Objective: To screen for genetic factors responsible for hyperhomocysteinemia and the risk for premature coronary artery disease. Materials and Methods: A total of 100 individuals with proven premature coronary artery disease and 200 age-and-sex matched controls were screened for polymorphisms in Methylenetetrahydrofolate reductase (MTHFR) (C677T) Methionine synthase (MS) genes (A2756G, C2758G), and the B12 and Folate levels were estimated. Results: Results from the mutational analysis revealed that in the study group, seven individuals had a polymorphism for the C677T allele in the MTHFR gene (one homozygous and six heterozygous) (Fischer's Exact test P > 0.046) (OR: 0.2711 95% CI 0.0774 to 0.9491). Six were heterozygous for the A2756G polymorphism in the MS gene (Fischer's Exact test P > 0.0012). None showed a polymorphism at the C2758G allele in the MS gene. Four controls showed heterozygosity for the C677T polymorphism and none for the MS gene. The B12 and Folate levels were significantly lower in the study group as compared to the controls. Conclusions: It is important to know which factors determine the total homocysteine concentrations. In the general population, the most important modifiable determinants of tHcy are folate intake and coffee consumption. Smoking and alcohol consumption are also associated with the total homocysteine concentrations, but more research is necessary to elucidate whether these relations are not originating from residual confounding due to other lifestyle factors.
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Affiliation(s)
- V V Ravi Kanth
- Department of Clinical Genetics, Institute of Genetics and Hospital for Genetic Diseases, Osmania University, Begumpet, Hyderabad, Andhra Pradesh, India
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Chen Q, Sun Y, Zhang L, Deng K, Xia H, Xing H, Xiang Y, Ran B, Zhang M, Xu X, Fu W. Detection of C677T mutation of MTHFR in subject with coronary heart disease by hairpin probe with enzymatic color on microarray. Biosens Bioelectron 2011; 28:84-90. [PMID: 21802936 DOI: 10.1016/j.bios.2011.07.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Revised: 06/10/2011] [Accepted: 07/04/2011] [Indexed: 12/17/2022]
Abstract
Molecular beacon (MB) is especially suited for detection of single nucleotide polymorphism (SNP), and the type of MB immobilized on the surface of microarray in particular, may detect multi-sample and multi-locus. However, the majority of MB needs to be labeled with fluorescence and quenching molecules on the two ends of the probe, and observed the reaction of fluorescence or complicated electrochemical signal produced hybridization of MB and target sequence by complex and expensive instruments. The "molecular beacon" and microarray designed appropriately in our study can produce visible light response signal induced by amplification effect of enzymatic color, and are avoided with the marker of fluorescence and quenching molecules and expensive instruments. The "molecular beacon" without fluorescence and quenching molecules is entitled as "hairpin DNA probe" by us for only the "hairpin" structure of traditional molecular beacon is adopted. The merits of two techniques, molecular beacon and amplification effect of enzymatic color, are successfully combined, and the technique is simple, sensitive and specific, to detect and compare the methylenetetrahydrofolate reductase (MTHFR) Gene C677T mutation of subjects between coronary heart disease (CHD) and control group. The results showed that MTHFR Gene C677T polymorphism is an independent risk factor for CHD.
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Affiliation(s)
- Qinghai Chen
- Laboratory, Clinical Experimental Base of Biosensor and Microarray, and Center of Molecule and Gene Diagnosis, Southwest Hospital, Third Military Medical University, Chongqing 400038, PR China
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15
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Chen L, Liu L, Hong K, Hu J, Cheng X. Three genetic polymorphisms of homocysteine-metabolizing enzymes and risk of coronary heart disease: a meta-analysis based on 23 case-control studies. DNA Cell Biol 2011; 31:238-49. [PMID: 21780915 DOI: 10.1089/dna.2011.1281] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Many epidemiological studies have explored the relationships between three genetic polymorphisms of genes encoding homocysteine-metabolizing enzymes (methionine synthase [MTR] A2756G, methionine synthase reductase [MTRR] A66G, and N(5),N(10)-methylenetetrahydrofolate reductase [MTHFR] A1298C) and risk of coronary heart disease (CHD), but no conclusive results were obtained. Therefore, we performed a meta-analysis of 23 case-control studies. Odds ratio (OR) and 95% confidence interval (95% CI) were used to examine the strength of the associations. Among those primary studies, 22 studies were for Europeans, and one study focused on the MTR A2756G polymorphism in Asians. The results of combined analyses of the MTR A2756G polymorphism suggested that the G allele was associated with increased risk of CHD and myocardial infarction (MI) especially for Europeans (GG vs. AA for CHD: OR [95% CI]=1.63 [1.18-2.25], p(z)(-test)=0.001, p(heterogeneity)=0.274; GG+AG vs. AA for MI: OR [95% CI]=1.44 [1.08-1.93], p(z)(-test)=0.014, p(heterogeneity)=0.611). In addition, the G allele was also associated with higher risk CHD based on population-based case-control studies (PCC) (GG vs. AA: OR [95% CI]=1.75 [1.24-2.49], p(z)(-test)=0.002, p(heterogeneity)=0.316). The results suggested that the MTRR A66G polymorphism was not associated with risk of CHD for Europeans (AA vs. GG: OR [95% CI]=1.07 [0.59-1.94], p(z)(-test)=0.831, p(heterogeneity)<0.01). The results suggested that the C allele of the MTHFR A1298C polymorphism might be associated with the increased risk of MI for Europeans (CC vs. CA+AA: OR [95% CI]=1.37 [1.03-1.84], p(z)(-test)=0.033, p(heterogeneity)=0.668). However, when subgroup analyses for sources of controls were performed, conflicting results were obtained. The results suggested that the C allele was associated with decreased risk of CHD based on hospital-based case-control studies, but associated with increased risk of CHD based on PCC. This meta-analysis suggests that MTR A2756G polymorphism, but not MTRR A66G and MTHFR A1298C, is associated with risk of CHD for Europeans. Because of limitations and potential bias, more well-designed studies with larger sample size, especially focused on Asians and Africans, should be performed in the future.
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Affiliation(s)
- Ling Chen
- Department of Cardiovascular Medicine, Second Affiliated Hospital of Nanchang University, No. 1 Min De Road, Nanchang, Jiangxi, China
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Saetre P, Vares M, Werge T, Andreassen OA, Arinami T, Ishiguro H, Nanko S, Tan EC, Han DH, Roffman JL, Muntjewerff JW, Jagodzinski PP, Kempisty B, Hauser J, Vilella E, Betcheva E, Nakamura Y, Regland B, Agartz I, Hall H, Terenius L, Jönsson EG. Methylenetetrahydrofolate reductase (MTHFR) C677T and A1298C polymorphisms and age of onset in schizophrenia: a combined analysis of independent samples. Am J Med Genet B Neuropsychiatr Genet 2011; 156:215-24. [PMID: 21302350 DOI: 10.1002/ajmg.b.31160] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Accepted: 11/30/2010] [Indexed: 12/20/2022]
Abstract
Methylenetetrahydrofolate reductase (MTHFR) is involved in the one-carbon cycle, which is of importance for nucleotide synthesis and methylation of DNA, membranes, proteins and lipids. The MTHFR gene includes two common polymorphisms (rs1801133 or C677T; rs1801131 or A1298C) which both alter enzyme activity. The T-allele of the C677T polymorphism has recently been associated with earlier age at onset of schizophrenia. In the present study we examined the association between the MTHFR C677T and A1298C polymorphisms and age at onset of schizophrenia in twelve samples consisting of 3,213 unrelated schizophrenia patients, including the original Scandinavian sample. There was no consistent relationship between MTHFR C677T, A1298C or combined 677T/1298C carriers and age of onset in schizophrenia when the results of each study were combined using meta-analysis. The present results suggest that the investigated MTHFR polymorphisms do not influence age of onset in schizophrenia.
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Affiliation(s)
- Peter Saetre
- Department of Clinical Neuroscience, HUBIN Project, Karolinska Institutet and Hospital, Stockholm, Sweden
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Zhang L, Yin RX, Liu WY, Miao L, Wu DF, Aung LHH, Hu XJ, Cao XL, Wu JZ, Pan SL. Association of methylenetetrahydrofolate reductase C677T polymorphism and serum lipid levels in the Guangxi Bai Ku Yao and Han populations. Lipids Health Dis 2010; 9:123. [PMID: 20977771 PMCID: PMC2987990 DOI: 10.1186/1476-511x-9-123] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2010] [Accepted: 10/27/2010] [Indexed: 12/02/2022] Open
Abstract
Background The association of methylenetetrahydrofolate reductase (MTHFR) gene polymorphism and serum lipid profiles is still controversial in diverse ethnics. Bai Ku Yao is an isolated subgroup of the Yao minority in China. The aim of the present study was to eveluate the association of MTHFR C677T polymorphism and several environmental factors with serum lipid levels in the Guangxi Bai Ku Yao and Han populations. Methods A total of 780 subjects of Bai Ku Yao and 686 participants of Han Chinese were randomly selected from our previous stratified randomized cluster samples. Genotyping of the MTHFR C677T was performed by polymerase chain reaction and restriction fragment length polymorphism combined with gel electrophoresis, and then confirmed by direct sequencing. Results The levels of serum total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), apolipoprotein (Apo) AI and ApoB were lower in Bai Ku Yao than in Han (P < 0.05-0.001). The frequency of C and T alleles was 77.4% and 22.6% in Bai Ku Yao, and 60.9% and 39.1% in Han (P < 0.001); respectively. The frequency of CC, CT and TT genotypes was 58.7%, 37.3% and 4.0% in Bai Ku Yao, and 32.6%, 56.4% and 11.0% in Han (P < 0.001); respectively. The levels of TC and LDL-C in both ethnic groups were significant differences among the three genotypes (P < 0.05-0.01). The T allele carriers had higher serum TC and LDL-C levels than the T allele noncarriers. The levels of ApoB in Han were significant differences among the three genotypes (P < 0.05). The T allele carriers had higher serum ApoB levels as compared with the T allele noncarriers. The levels of TC, TG and LDL-C in Bai Ku Yao were correlated with genotypes (P < 0.05-0.001), whereas the levels of LDL-C in Han were associated with genotypes (P < 0.001). Serum lipid parameters were also correlated with sex, age, body mass index, alcohol consumption, cigarette smoking, and blood pressure in the both ethnic groups. Conclusions The differences in serum TC, TG, LDL-C and ApoB levels between the two ethnic groups might partly result from different genotypic and allelic frequencies of the MTHFR C677T or different MTHFR gene-enviromental interactions.
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Affiliation(s)
- Lin Zhang
- Department of Cardiology, Institute of Cardiovascular Diseases, First Affiliated Hospital, Guangxi Medical University, 22 Shuangyong Road, Nanning 530021, Guangxi, China
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Koubaa N, Nakbi A, Hammami S, Mehri S, Attia N, Ben Farhat M, Hammami M. Association of the C677T MTHFR Polymorphism With Homocysteine, Ox-LDL Levels, and Thiolactonase Activities in the Severity of Coronary Syndrome. Clin Appl Thromb Hemost 2010; 16:515-21. [DOI: 10.1177/1076029610369798] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Coronary artery diseases (CAD) are influenced by multiple genes of modest effect as the methylenetetrahydrofolate reductase (MTHFR) C677T gene polymorphism, related to MTHFR activity and total plasma homocysteine (tHcy) concentration. This study was designed to evaluate tHcy, oxidized low-density lipoprotein (LDL) (ox-LDL), high-sensibility C-reactive protein (Hs CRP) levels, and homocysteine thiolactonase (HTase) activities as new risk factors for CAD and to investigate an association between MTHFR polymorphism tHcy concentrations and coronary syndrome severity. Our results showed significantly higher levels of tHcy and ox-LDL in patients associated with lower HTase activities. These levels increased proportionally to disease severity. Total plasma Hcy levels were negatively correlated to HTase activities in patients where the TT genotype was significantly more frequent. In a multivariate analysis, tHcy level was the only independent factor affecting the coronary syndrome severity. High tHcy levels are associated with coronary syndrome severity and may be explained either by the elevated prevalence of TT genotype or by the diminished HTase activities.
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Affiliation(s)
- Nadia Koubaa
- Laboratory of Biochemistry, UR Human Nutrition and Metabolic Disorders, Faculty of Medicine, Monastir, Tunisia
| | - Amel Nakbi
- Laboratory of Biochemistry, UR Human Nutrition and Metabolic Disorders, Faculty of Medicine, Monastir, Tunisia
| | - Sonia Hammami
- Department of Internal Medicine, CHU F Bourguiba, Monastir, Tunisia
| | - Sounira Mehri
- Laboratory of Biochemistry, UR Human Nutrition and Metabolic Disorders, Faculty of Medicine, Monastir, Tunisia
| | - Nabil Attia
- Laboratory of Biochemistry, UR Human Nutrition and Metabolic Disorders, Faculty of Medicine, Monastir, Tunisia
| | | | - Mohamed Hammami
- Laboratory of Biochemistry, UR Human Nutrition and Metabolic Disorders, Faculty of Medicine, Monastir, Tunisia,
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The I allele of the angiotensin converting enzyme I/D polymorphism confers protection against coronary artery disease. Coron Artery Dis 2010; 21:151-6. [DOI: 10.1097/mca.0b013e328335a042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sakuta H, Suzuki T, Yasuda H, Ito T. White blood cell count is associated with plasma total homocysteine in Japanese men. Scandinavian Journal of Clinical and Laboratory Investigation 2009; 65:447-52. [PMID: 16179277 DOI: 10.1080/00365510510025782] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
White blood cell (WBC) count has been related to risk for coronary heart disease. The relationship may be due to the association between WBC count and cardiovascular risk factors. So far, it has been shown that WBC count is associated with body mass index, total cholesterol, triglyceride, glucose, blood pressure and some lifestyle factors. It is not known, however, whether WBC count is associated with other risk factors such as total homocysteine or gamma-glutamyl transferase. The association between WBC count, total homocysteine and gamma-glutamyl transferase was analyzed cross-sectionally in middle-aged Japanese men. In a univariate regression analysis WBC count was associated positively with total homocysteine (beta (standard regression coefficient) = 0.112; p<0.001) but not with gamma-glutamyl transferase (beta = 0.033; p = 0.309). In a multivariate analysis which included cigarette smoking, physical activity, ethanol consumption, vegetable intake and body mass index, the association between WBC count and total homocysteine remained significant (beta = 0.062; p = 0.026). The association may partially explain the reported association between elevated WBC count and cardiovascular disease.
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Affiliation(s)
- H Sakuta
- Department of Internal Medicine, Self-Defense Forces Central Hospital, Tokyo, Japan.
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21
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Palep-Singh M, Picton HM, Yates ZR, Barth J, Balen AH. Polycystic ovary syndrome and the single nucleotide polymorphisms of methylenetetrahydrofolate reductase: a pilot observational study. HUM FERTIL 2009; 10:33-41. [PMID: 17454207 DOI: 10.1080/14647270600950157] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
UNLABELLED Polycystic ovary syndrome (PCOS), insulin resistance and overall mortality due to diabetes and coronary artery disease are higher in South Asians than in Caucasians. AIMS We compared the prevalence of the C677T and A1298C single nucleotide polymorphisms in the methylenetetrahydrofolate reductase gene in South Asian and Caucasian women, its association with folate and homocysteine (Hcy) metabolism, and its relevance to future atherogenic events. METHODS AND RESULTS 71 women were recruited for the study: South Asian PCOS (21) plus controls (9) and Caucasian PCOS (25) plus controls (16). Anthropometric and laboratory parameters were compared. South Asian PCOS women were significantly hyperandrogenic and exhibited a greater degree of insulin resistance. Caucasian PCOS women had higher plasma Hcy concentrations with a 1.9 times higher frequency of the T allele than the South Asian PCOS group. In the presence of this variant allele, plasma Hcy levels appear to be higher in both PCOS groups. The South Asians had a 1.8 times higher frequency of the C allele than the Caucasians; however, the overall frequency was comparable in the two PCOS groups. The frequency of homozygosity, i.e. TT677 and CC1298, was 7.2% and 4.9% in the Caucasians and 0% and 16.6% in the South Asian recruits, respectively. Dietary inadequacies in the South Asian women can influence their plasma folate and B12 concentrations resulting in hyperhomocysteinemia which, in combination with dyslipidaemia and insulin resistance, can lead to long-term atherogenic consequences. CONCLUSIONS Current data suggests that the mechanisms of atherothrombosis have separate pathways in the two ethnic groups. Larger studies exploring the current theme need to be carried out in the PCOS groups to obtain adequate insight.
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Affiliation(s)
- M Palep-Singh
- Reproductive Medicine Unit, Leeds Teaching Hospitals NHS Trust, Leeds, UK.
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Xenophontos S, Hadjivassiliou M, Karagrigoriou A, Demetriou N, Miltiadous G, Marcou I, Elisaf M, Mikhailidis DP, Cariolou MA. Low HDL cholesterol, smoking and IL-13 R130Q polymorphism are associated with myocardial infarction in Greek Cypriot males. A pilot study. Open Cardiovasc Med J 2008; 2:52-9. [PMID: 18949100 PMCID: PMC2570578 DOI: 10.2174/1874192400802010052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2008] [Revised: 07/02/2008] [Accepted: 07/04/2008] [Indexed: 11/22/2022] Open
Abstract
This study was carried out in Greek Cypriot males to identify risk factors that predispose to myocardial infarction (MI). Genetic and lipid risk factors were investigated for the first time in a Greek Cypriot male case-control study.Contrary to other studies, mean low density lipoprotein cholesterol did not differ between cases and controls. High density lipoprotein cholesterol on the other hand, although within normal range in cases and controls, was significantly higher in the control population. In agreement with many other studies, smoking was significantly more prevalent in cases compared with controls. In pooled cases and controls, smokers had a significantly lower HDL-C level compared with non-smokers. The frequency of the IL-13 R130Q homozygotes for the mutation (QQ), as well as the mutant allele were significantly higher in cases compared with controls. The IL-13 R130Q variant, or another locus, linked to it, may increase the risk of MI.
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Affiliation(s)
- Stavroulla Xenophontos
- Department of Cardiovascular Genetics & The Laboratory of Forensic Genetics, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
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Spiroski I, Kedev S, Antov S, Arsov T, Krstevska M, Dzhekova-Stojkova S, Kostovska S, Trajkov D, Petlichkovski A, Strezova A, Efinska-Mladenovska O, Spiroski M. Association of methylenetetrahydrofolate reductase (MTHFR-677 and MTHFR-1298) genetic polymorphisms with occlusive artery disease and deep venous thrombosis in Macedonians. Croat Med J 2008; 49:39-49. [PMID: 18293456 DOI: 10.3325/cmj.2008.1.39] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
AIM To analyze the association of methylenetetrahydrofolate reductase polymorphisms (MTHFR-677 and MTHFR-1298) with occlusive artery disease and deep venous thrombosis in Macedonians. METHODS We examined 83 healthy respondents, 76 patients with occlusive artery disease, and 67 patients with deep venous thrombosis. Blood samples were collected and DNA was isolated from peripheral blood leukocytes. Identification of MTHFR mutations was done with CVD StripAssay (ViennaLab, Labordiagnostika GmbH, Vienna, Austria) and the population genetics analysis package, PyPop, was used for the analysis. Pearson P values, crude odds ratio, and Wald's 95% confidence intervals were calculated. RESULTS The frequency of C alleles of MTHFR-677 was 0.575 in patients with deep venous thrombosis, 0.612 in patients with occlusive artery disease, and 0.645 in healthy participants. The frequency of T allele of MTHFR-677 was lower in healthy participants (0.355) than in patients with occlusive artery disease (0.388) and deep venous thrombosis (0.425). The frequency of A allele for MTHFR-1298 was 0.729 in healthy participants, 0.770 in patients with occlusive artery disease, and 0.746 in patients with deep venous thrombosis. The frequency of C allele of MTHFR-1298 was 0.271 in healthy participants, 0.230 in patients with occlusive artery disease, and 0.425 in patients with deep venous thrombosis. No association of MTHFR-677 and MTHFR-1289 polymorphisms with occlusive artery disease and deep venous thrombosis was found, except for the protective effect of MTHFR/CA:CC diplotype for occlusive artery disease. CONCLUSION We could not confirm a significant association of MTHFR-677 and MTHFR-1289 polymorphisms with occlusive artery disease or deep venous thrombosis in Macedonians, except for the protective effect of MTHFR/CA:CC diplotype against occlusive artery disease.
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Affiliation(s)
- Igor Spiroski
- Institute of Hearth Diseases, University School of Medicine St. Kiril and Metodij, Skopje, Republic of Macedonia.
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Ilhan N, Kucuksu M, Kaman D, Ilhan N, Ozbay Y. The 677 C/T MTHFR polymorphism is associated with essential hypertension, coronary artery disease, and higher homocysteine levels. Arch Med Res 2007; 39:125-30. [PMID: 18068006 DOI: 10.1016/j.arcmed.2007.07.009] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2007] [Accepted: 07/02/2007] [Indexed: 11/29/2022]
Abstract
BACKGROUND Essential hypertension (EH) and cardiovascular disease are common, multifactorial disorders likely to be influenced by multiple genes of modest effect. The C677T methylenetetrahydrofolate reductase (MTHFR) gene polymorphism is related to MTHFR enzyme activity and to plasma homocysteine (Hcy) concentration. This study was designed to investigate an association of this polymorphism with coronary artery disease (CAD), EH, and healthy subjects. METHODS In this study, we measured serum folate, serum vitamin B12, and plasma homocysteine and determined the MTHFR C677T genotype of 78 patients with essential hypertension, 100 patients with coronary artery disease, and 100 healthy subjects. MTHFR genotypes were assessed by real-time polymerase chain reaction. RESULTS CC, CT, and TT genotype frequencies were 52, 44.0, and 4.0% in patients with CAD, respectively. In patients with essential hypertension, the CC, CT, and TT genotype frequencies were 46.2, 41.0, and 12.8%, respectively. In control subjects, the CC, CT, and TT genotype frequencies were 72.0, 26.0, and 2.0%, respectively. The C allele was significantly more frequent in controls compared with patients with EH (p<0.05), and CC genotypes were more frequent in controls compared to patients with EH and CAD. Homocysteine level was higher in TT genotypes in CAD patients compared with CC and CT genotypes (p<0.01). MTHFR gene polymorphism is an independent risk factor for EH but not for CAD. CONCLUSIONS The TT genotype of the 677C/T MTHFR polymorphism is associated with EH and CAD. In addition, TT genotypes had higher plasma Hcy levels in CAD patients compared with CC and CT genotypes. MTHFR gene polymorphism is an independent risk factor for EH but not for CAD.
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Affiliation(s)
- Nevin Ilhan
- Department of Biochemistry, Firat Universty Medical Center, Elazig, Turkey
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Laraqui A, Allami A, Carrié A, Raisonnier A, Coiffard AS, Benkouka F, Bendriss A, Benjouad A, Bennouar N, El Kadiri N, Benomar A, Fellat S, Benomar M. Relation between plasma homocysteine, gene polymorphisms of homocysteine metabolism-related enzymes, and angiographically proven coronary artery disease. Eur J Intern Med 2007; 18:474-83. [PMID: 17822659 DOI: 10.1016/j.ejim.2007.02.020] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2006] [Revised: 11/12/2006] [Accepted: 02/15/2007] [Indexed: 11/30/2022]
Abstract
BACKGROUND Hyperhomocyteinemia (HHcy) is a risk factor for coronary artery disease (CAD), and methylenetetrahydrofolate reductase (MTHFR), methionine synthase (MTR), and methionine synthase reductase (MTRR) polymorphisms may contribute to plasma total homocysteine (tHcy) variation. We investigated the association of polymorphisms 1298A-->C in the MTHFR gene, 2756A-->G in the MTR gene, and 66A-->G in the MTRR gene with tHcy levels and with CAD in patients undergoing coronary angiography. METHODS CAD patients (n=151) and control subjects (n=79) were compared regarding the prevalence of the polymorphisms, risk factors, and biochemical parameters. RESULTS The mean tHcy concentration was significantly higher in CAD patients than in control subjects (P<0.001). HHcy (tHcy>/=15 mumol/l) conferred an OR of CAD of 4.1 (95% CI 2.2-7.5, P<0.001). In both cases and controls, smokers had a higher tHcy level than non-smokers and demonstrated a markedly increased risk for CAD (OR=2.5, 95% CI 1.7-3.3, P<0.001). The allele frequencies of the MTHFR 1298A-->C, MTR 2756A-->G, and MTRR 66A-->G mutations were 36.7%, 15.7%, and 36.6%, respectively. The 1298C allele frequency was significantly higher in the CAD group than in controls (P<0.05) and showed a significant association with CAD in heterozygote carriers. There was no statistically significant difference between cases and controls in the frequencies of the A2756G alleles/genotypes in the MTR gene and of the A66G alleles/genotypes in the MTRR gene. The contributions to tHcy levels of the three common mutations were statistically significant. The heterozygosity of the MTHFR 1298AC genotype, MTR 2756G allele, and MTRR 66G allele yielded an OR of 3.4, 2.0, and 2.1, respectively, for having HHcy. CONCLUSION We suggest that HHcy confers a risk for CAD, and smokers with tHcy are at a greatly increased risk. Our finding supports an important role of the MTHFR gene in CAD and provides evidence of polygenic regulation of tHcy.
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Affiliation(s)
- Abdelilah Laraqui
- Ligue Nationale de Lutte Contre les Maladies Cardiovasculaires, Unité d'Etudes des Facteurs Métaboliques et Polymorphismes Génétiques, Rabat, Morocco; UFR Biochimie Immunologie, Faculté des Sciences, Université Mohamed V. Rabat, Morocco; Laboratoire de Biochimie Médicale A, Unité Fonctionnelle Endocrinologie-Moléculaire-Oncologie, CHU Pitié-Salpêtrière, Paris, France
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Haim M, Tanne D, Goldbourt U, Doolman R, Boyko V, Brunner D, Sela BA, Behar S. Serum Homocysteine and Long-Term Risk of Myocardial Infarction and Sudden Death in Patients with Coronary Heart Disease. Cardiology 2006; 107:52-6. [PMID: 16763372 DOI: 10.1159/000093697] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2005] [Accepted: 04/11/2006] [Indexed: 01/22/2023]
Abstract
We have prospectively evaluated the risk of incident coronary events in association with serum total homocysteine in patients with preexisting chronic coronary heart disease. A nested case-control design was used. Total homocysteine concentration was measured in baseline fasting serum samples from patients with chronic coronary heart disease enrolled in the Bezafibrate Infarction Prevention Study (n = 3,090) who developed coronary events during 6.2 years of follow-up (n = 69). They were matched for age and gender with controls without subsequent cardiovascular events. Elevated homocysteine levels were associated with 2.5 times higher risk of subsequent coronary events and each 5 mumol/l increment was associated with a 25% higher risk.
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Affiliation(s)
- Moti Haim
- Department of Cardiology, Rabin Medical Center, Beilinson Campus, Petah Tikva, Israel.
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27
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Yagisawa M, Doi Y, Uenohara T, Toda M, Shigematsu N, Nakata R. Betaine supplementation suppresses plasma homocysteine level elevation induced by folate deficiency in rats. Nutr Res 2006. [DOI: 10.1016/j.nutres.2006.05.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Taymaz H, Erarslan S, Oner ET, Alkan T, Ağirbaşli M, Kirdar B. Sequence variations within the genes related to hemostatic imbalance and their impact on coronary artery disease in Turkish population. Thromb Res 2006; 119:55-62. [PMID: 16472842 DOI: 10.1016/j.thromres.2005.12.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2005] [Revised: 12/28/2005] [Accepted: 12/29/2005] [Indexed: 11/15/2022]
Abstract
Coronary artery disease (CAD) is reported to be associated with some genetic risk factors. Since identification of genetic risk factors for CAD in different ethnic groups is important for the development of new intervention and prevention programs, we investigated the association between the R353Q and -323ins10 polymorphisms in Factor VII gene, C677T mutation in MTHFR, Factor V Leiden and PT G20210A mutations and CAD in Turkish population. The promoter region of the PAI-1 gene was also screened by SSCA (single-stranded conformation analysis) using specifically designed primers. 137 CAD patients with early onset documented by coronary angiography and 41 individuals who had no significant coronary stenosis by angiography as control group were screened for the identification of the polymorphisms. In conclusion, Factor V Leiden was found to be an independent genetic risk factor for CAD in Turkish population. Combined risk assessment indicated that the coexistence of two other inherited thrombophilia markers, namely MTHFR C677T and PT G20210A with Factor V Leiden may increase the risk of the development of the disease in this population. The results of the present study show that there is no statistically significant association between the two polymorphisms in Factor VII gene, MTHFR C677T polymorphism, PT G20210A polymorphism, 4G/5G polymorphism of PAI-1 and CAD in Turkish population.
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Affiliation(s)
- Hilal Taymaz
- Department of Chemical Engineering, Bogazici University, 34342 Bebek-Istanbul, Turkey
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29
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Emam Sultan I, Abbas H, Abdulkader El-Reweny A, Ahmed Khalafala O, El-Abd D, Mosaad N. Effect of Methylenetetrahydrofolate Reductase Gene Mutation on Plasma Homocysteine Level and its Prevalence in Arterial Diseases. J Taibah Univ Med Sci 2006. [DOI: 10.1016/s1658-3612(06)70004-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Falchi A, Giovannoni L, Piras IS, Calo CM, Moral P, Vona G, Varesi L. Prevalence of genetic risk factors for coronary artery disease in Corsica island (France). Exp Mol Pathol 2005; 79:210-3. [PMID: 16248996 DOI: 10.1016/j.yexmp.2005.09.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2005] [Accepted: 09/12/2005] [Indexed: 10/25/2022]
Abstract
We have investigated the frequencies of seven markers among 100 unrelated individuals with angiographically documented CAD (Coronary Artery Disease) and among 100 unrelated healthy blood donors in the central region of Corsica island (France). The seven polymorphisms analyzed were chosen from six candidate genes involved in (1) Renin-Angiotensin system: Angiotensin converting enzyme (ACE I/D), (2) Lipid metabolism: Cholesterol Ester Transfer Protein gene (CETP TAQ1B), (3) Platelet aggregation: alpha and beta subunits of the platelet GpIIb/GpIIIa integrin complex (GpIIb HPA3 and GpIIIa Pl(A1/A2)), (4) Coagulation fibrinolysis: Plasminogen Activator Tissue (PLAT TPA25 I/D) and Methylenetetrahydrofolate Reductase (MTHFR C677T and A1298C). The samples were genotyped using the polymerase chain reaction followed by restriction enzyme analysis for the RFLPs. No significant difference in allele frequencies between patient and control groups was observed. The occurrence of the MTHFR T677T genotype and of the T677T/A1298A compound genotype is higher in cases (20%) than in the controls (4%). Odds ratio seems to indicate that individuals with the MTHFR T677T genotype and the T677T/A1298A compound genotype had a 6-fold increased risk for developing CAD (ORs = 6; 95% CIs = 1.96-18.28) suggesting a possible association of MTHFR C677T with the risk of CAD in Corsican population.
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Affiliation(s)
- A Falchi
- Department of Human Genetics, Faculty of Science, University of Corsica, BP52 20250 Corte Corsica, France
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31
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Grassi M, Assanelli D, Mozzini C, Albertini F, Salvadori G, Archetti S, Negrini R, Galeazzi G, Pezzini A. Modeling premature occurrence of acute coronary syndrome with atherogenic and thrombogenic risk factors and gene markers in extended families. J Thromb Haemost 2005; 3:2238-44. [PMID: 16194201 DOI: 10.1111/j.1538-7836.2005.01512.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND The interaction between genetic and environmental risk factors in determining premature cardiovascular events has been largely investigated in case-control association studies. By contrast, few family based analyses have been performed so far. PATIENTS/METHODS From a series of 2936 subjects aged 45-64, we selected probands who died for a premature (<50 years) ischemic heart disease (IHD) and with at least one family member with a history of IHD also occurring under the age of 50. Ninety-four families from 32 pedigrees including 296 subjects were identified. In this population, we analyzed the relationship between background risk factors [age, gender, the G1691A polymorphisms of factor V gene, the C677T polymorphisms of the methylenetetrahydrofolate reductase (MTHFR) gene, the 844ins68bp polymorphisms of the cystathionine-beta-synthase (CBS) gene, and the apolipoprotein E (APOE) polymorphisms] and environmental risk factors, both atherogenic (smoke, hypertension, diabetes, dyslipidemia, obesity) and thrombogenic (smoke, homocysteine, fibrinogen) by a Markov block-recursive modeling approach. RESULTS None of the studied polymorphisms had an independent direct effect on the risk of IHD. As opposed to atherogenic factors, thrombogenic factors (homocysteine and fibrinogen) turned out to be possible mediators of the indirect effect of the MTHFR gene on IHD risk (OR: 1.30; 95% CI: 1.01-1.69, for every 8 mm increase in plasma levels of homocysteine in TT-carriers compared with CT/CC-carriers (OR: 1.11; 95% CI: 1.01-1.22), for every 20 g L(-1) increase in plasma levels of fibrinogen in TT-carriers compared with CT/CC-carriers). CONCLUSION Plasma levels of homocysteine and fibrinogen may be interpreted as intermediate factors mediating the effect of predisposing genes on the risk premature cardiovascular disease.
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Affiliation(s)
- M Grassi
- Department of Health Sciences, Section of Medical Statistics and Epidemiology, University of Pavia, Pavia, Italy
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32
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Vilella E, Virgos C, Murphy M, Martorell L, Valero J, Simó JM, Joven J, Fernández-Ballart J, Labad A. Further evidence that hyperhomocysteinemia and methylenetetrahydrofolate reductase C677T and A1289C polymorphisms are not risk factors for schizophrenia. Prog Neuropsychopharmacol Biol Psychiatry 2005; 29:1169-74. [PMID: 16076517 DOI: 10.1016/j.pnpbp.2005.07.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
It has been suggested that total plasma homocysteine (tHcy) concentrations and methylenetetrahydrofolate reductase (MTHFR) gene polymorphisms are risk factors for schizophrenia. We conducted a case-control study to investigate whether tHcy levels and MTHFR C677T and A1298C variants are associated with schizophrenia, giving special consideration to confounding factors. Logistic regression analysis showed that neither tHcy nor MTHFR polymorphisms were associated with schizophrenia. Homozygosity for MTHFR C677T was associated with higher tHcy concentrations in control and schizophrenia groups (P<0.01), which was mainly driven by the male group. The A1298C variant did not show any association with tHcy concentrations. In conclusion, these results do not confirm an independent relationship of tHcy and MTHFR genotype with risk of schizophrenia.
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Affiliation(s)
- Elisabet Vilella
- Psychiatric University Hospital Institut Pere Mata, Unitat de Psiquiatria, Facultat de Medicina i Ciències de la Salut, Universitat Rovira i Virgili, C/Sant Llorenç 21, 43201 Reus, Spain.
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33
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Murthy SN, Obregon DF, Chattergoon NN, Fonseca NA, Mondal D, Dunne JB, Diez JG, Jeter JR, Kadowitz PJ, Agrawal KC, McNamara DB, Fonseca VA. Rosiglitazone reduces serum homocysteine levels, smooth muscle proliferation, and intimal hyperplasia in Sprague-Dawley rats fed a high methionine diet. Metabolism 2005; 54:645-52. [PMID: 15877295 DOI: 10.1016/j.metabol.2004.12.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Homocysteine (Hcy) is a metabolite of the essential amino acid methionine. Hyperhomocysteinemia is associated with vascular disease, particularly carotid stenosis. Rosiglitazone, a ligand of the peroxisome proliferator-activated receptor gamma , attenuates balloon catheter-induced carotid intimal hyperplasia in type 2 diabetic rats. We studied 4 groups (n = 7 per group) of adult female Sprague-Dawley rats fed (a) powdered laboratory chow (control), (b) control diet with rosiglitazone (3.0 mg/kg/d), (c) diet containing 1.0% l -methionine, and (d) diet containing methionine and rosiglitazone. After 1 week on high methionine diet, the rats were administered an aqueous preparation of rosiglitazone by oral gavage. One week after initiation of rosiglitazone, balloon catheter injury of the carotid artery was carried out using established methods, and the animals continued on their respective dietary and drug regimens for another 21 days. At the end of the experimental period, blood samples were collected, and carotid arteries and liver were harvested. Serum Hcy increased significantly on methionine diet compared with controls (28.9 +/- 3.2 vs 6.3 +/- 0.04 micromol/L). Development of intimal hyperplasia was 4-fold higher in methionine-fed rats; this augmentation was significantly reduced ( P < .018) in rosiglitazone-treated animals. Rosiglitazone treatment significantly ( P < .001) suppressed Hcy levels and increased the activity of the Hcy metabolizing enzyme, cystathionine-beta-synthase in the liver samples. Hcy (100 micromol/L) produced a 3-fold increase in proliferation of rat aortic vascular smooth muscle cells; this augmentation was inhibited by incorporating rosiglitazone (10 micromol/L). After balloon catheter injury to the carotid artery of animals on a high methionine diet, there was an increase in the rate of development of intimal hyperplasia consistent with the known effects of Hcy. It is demonstrated for the first time that the peroxisome proliferator-activated receptor gamma agonist rosiglitazone can attenuate the Hcy-stimulated increase in the rate of development of intimal hyperplasia indirectly by increasing the rate of catabolism of Hcy by cystathionine-beta-synthase and directly by inhibiting vascular smooth muscle cell proliferation. These findings may have important implications for the prevention of cardiovascular disease and events in patients with hyperhomocysteinemia (HHcy).
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Affiliation(s)
- Subramanyam N Murthy
- Section of Endocrinology, Department of Medicine, Tulane University Health Sciences Center, New Orleans, LA 70112, USA
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34
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Dedoussis GVZ, Panagiotakos DB, Pitsavos C, Chrysohoou C, Skoumas J, Choumerianou D, Stefanadis C. An association between the methylenetetrahydrofolate reductase (MTHFR) C677T mutation and inflammation markers related to cardiovascular disease. Int J Cardiol 2005; 100:409-14. [PMID: 15837084 DOI: 10.1016/j.ijcard.2004.08.038] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2004] [Revised: 08/05/2004] [Accepted: 08/07/2004] [Indexed: 11/22/2022]
Abstract
BACKGROUND Prospective studies have identified many markers of systemic inflammation that are powerful predictors of future cardiovascular events. The methylenetetrahydrofolate reductase (MTHFR) C677T genotype, a common polymorphism that induces hyperhomocysteinaemia, has been proposed as a genetic risk factor for cardiovascular disease. In this work, we evaluated the relationship between the levels of inflammation markers and MTHFR genotype among cardiovascular disease free subjects of the ATTICA study. METHODS During 2001-2002, we randomly enrolled for genetic evaluation 574 subjects from Attica region, Greece. In this work, we investigated demographic, lifestyle, clinical, biochemical and genetic information from 322 men (46+/-13 years) and 252 women (45+/-14 years). Among other characteristics, we measured various inflammatory markers levels in relation to C677T MTHFR genotype distribution. RESULTS The MTHFR genotypes distribution was: homozygous normal (CC) genotype, 41%; heterozygous (CT), 48%; and homozygous mutant (TT) genotype, 11%. C-reactive protein (CRA), fibrinogen, white blood cell (WBC) counts and amyloid-a levels were higher in TT compared to CC and CT genotypes (p<0.01), in both genders, even after controlling for various potential confounders. CONCLUSION The observed association between markers of systemic inflammation with MTHFR genotype may state a hypothesis for a common pathobiological mechanism between inflammation process and MTHFR, which is a key enzyme in homocysteine (Hcy) metabolism.
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Affiliation(s)
- George V Z Dedoussis
- Department of Dietetics and Nutrition, Harokopio University, 46 Paleon Polemiston St. Glyfada, Attica 166 74, Athens, Greece
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35
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Kalina A, Czeizel AE. The methylenetetrahydrofolate reductase gene polymorphism (C677T) is associated with increased cardiovascular mortality in Hungary. Int J Cardiol 2005; 97:333-4. [PMID: 15458711 DOI: 10.1016/j.ijcard.2003.08.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2003] [Accepted: 08/07/2003] [Indexed: 12/13/2022]
Abstract
The gene for methylenetetrahydrofolate reductase (MTHFR) has two different alleles (C and T), where the T is associated with decreased enzyme activity, hyperhomocysteinaemia, and increased risk for thromboembolism in coronary heart disease (CHD). The study was conducted using a sample of 378 Hungarian newborn infants: 96 control subjects (age: 59.9+/-8.6 years) with chest pain and 315 CHD patients (61.4+/-7.5 years). All adult subjects had undergone coronary angiography. It can be concluded that the carriers of T allele with CHD died earlier due to myocardial infarction and the C allele with lower homocysteine level may provide protection against fatal coronary artery occlusion.
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36
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Shai I, Stampfer MJ, Ma J, Manson JE, Hankinson SE, Cannuscio C, Selhub J, Curhan G, Rimm EB. Homocysteine as a risk factor for coronary heart diseases and its association with inflammatory biomarkers, lipids and dietary factors. Atherosclerosis 2004; 177:375-81. [PMID: 15530913 DOI: 10.1016/j.atherosclerosis.2004.07.020] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2004] [Accepted: 07/14/2004] [Indexed: 11/24/2022]
Abstract
The causal relation of total Homocysteine (tHcy) to coronary heart diseases (CHD) is unclear. In vitro studies suggest a proinflammatory effect. Among 32,826 women from the Nurses' Health Study who provided blood samples in 1989-1990, 237 CHD events were documented during 8 years of follow-up. The cases (1:2) were matched to controls on age, smoking, and month of blood draw. Plasma tHcy was inversely associated with blood levels of folate (partial r = -0.3, P < 0.0001) and B1(2) (r = -0.2, P < 0.0001) and with dietary intake of folate (r = -0.1, P < 0.01) and B(2) vitamin (r = -0.1, P = 0.01). tHcy was positively associated with soluble tumor necrosis receptor (sTNF-R) 1 and 2 (partial r = 0.2, P < 0.0001). In a multivariate model adjusted for age, smoking, BMI, parental history, hypertension, diabetes, postmenopausal hormone use, physical activity and alcohol intake, the relative risk of CHD between the extreme quartiles of tHcy was 1.66 (95% CI; 1.05-2.64, P trend = 0.02). The association was not appreciably attenuated after further adjustments for sTNF-R1, sTNF-R2, CRP, or Total Cholesterol:/HDL-c ratio. tHcy is an independent risk predictor of CHD and modestly associated with TNF-receptors. However, the inflammatory biomarkers measured could not explain its role in CHD.
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Affiliation(s)
- Iris Shai
- Department of Nutrition, Harvard School of Public Health, Boston, MA, USA
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37
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Brenner H, Wahl HW, Rott C. The German Center for Research on Aging at the University of Heidelberg: an interdisciplinary approach. Exp Gerontol 2004; 39:3-9. [PMID: 14724058 DOI: 10.1016/j.exger.2003.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In September 1995, the German Center for Research on Aging at the University of Heidelberg had been founded to become a leading national center of excellence with a clear interdisciplinary scope of ageing research activities. So far, three departments have been built up successively: the Department of Social and Environmental Gerontology (established in 1997, chair: Prof. Hans-Werner Wahl), the Department of Adult Development (established in 1998, provisional chair: Prof. Andreas Kruse), and the Department of Epidemiology (established in 2000, chair: Prof. Hermann Brenner). As one of the next steps, the disciplinary spectrum of the Center will be complemented by setting up several junior research groups in molecular ageing research. Within the few years of its existence, the Center has set up multiple large-scale, extramurally funded cross-sectional, case-control and longitudinal studies. These studies provide a unique common basis for interdisciplinary collaboration both within the Center and with the Center's numerous national and international research partners.
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Affiliation(s)
- Hermann Brenner
- Department of Epidemiology, German Center for Research on Aging, Bergheimer Strasse 20, D-69115 Heidelberg, Germany.
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38
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Koch W, Ndrepepa G, Mehilli J, Braun S, Burghartz M, Lengnick H, Kölling K, Schömig A, Kastrati A. Homocysteine Status and Polymorphisms of Methylenetetrahydrofolate Reductase Are Not Associated With Restenosis After Stenting in Coronary Arteries. Arterioscler Thromb Vasc Biol 2003; 23:2229-34. [PMID: 14604831 DOI: 10.1161/01.atv.0000105055.68038.29] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective—
We investigated the influence of elevated homocysteine plasma levels and 2 polymorphisms, 677C/T and 1298A/C, of the methylenetetrahydrofolate reductase (MTHFR) gene on the risk of restenosis after stenting in patients with symptomatic coronary artery disease.
Methods and Results—
Homocysteine levels and MTHFR genotypes were determined in 800 consecutive patients treated with coronary artery stenting. Angiographic restenosis (≥50% diameter stenosis at 6-month follow-up) was present in 25.8% of the patients with low homocysteine levels (at or below the median of 11.6 μmol/L; n=400) and 24.1% of the patients with high homocysteine levels (>11.6 μmol/L; n=400;
P
=0.62). Rates of angiographic restenosis were 26.0%, 23.5%, and 26.9% in carriers of the 677CC, 677CT, and 677TT genotypes (
P
=0.75), respectively, and 24.4%, 25.9%, and 24.0% in patients with the 1298AA, 1298AC, and 1298CC genotypes (
P
=0.90), respectively. The need for restenosis-driven reintervention (clinical restenosis) was 18.8% in subjects with low homocysteine concentrations and 19.0% in subjects with high homocysteine concentrations during the first year after the intervention (
P
=0.93). Rates of clinical restenosis were 19.5%, 17.1%, and 23.3% in carriers of the 677CC, 677CT, and 677TT genotypes (
P
=0.37), respectively, and 17.6%, 18.6%, and 24.7% in patients with the 1298AA, 1298AC, and 1298CC genotypes (
P
=0.27), respectively.
Conclusions—
Elevated levels of homocysteine and 2 polymorphisms of the MTHFR gene are not associated with restenosis after stenting in coronary arteries.
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Affiliation(s)
- Werner Koch
- Deutsches Herzzentrum München, Experimentelle Kardiologie, Lazarettstrasse 36, D-80636 München, Germany.
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39
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Abu-Amero KK, Wyngaard CA, Dzimiri N. Prevalence and Role of Methylenetetrahydrofolate Reductase 677 C→T and 1298 A→C Polymorphisms in Coronary Artery Disease in Arabs. Arch Pathol Lab Med 2003; 127:1349-52. [PMID: 14521457 DOI: 10.5858/2003-127-1349-paromr] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Abstract
Context.—Previous studies reported an association of 677 C→T and 1298 A→C methylenetetrahydrofolate reductase (MTHFR) variants with coronary artery disease (CAD). No previous studies concerning the prevalence of these 2 MTHFR variants or their possible association with CAD in Arabs are currently available in the literature.
Objective.—To determine the prevalence of MTHFR variants and their potential relevance to CAD among Arabs.
Design.—We used polymerase chain reaction and restriction enzyme digestion to determine the prevalence of these 2 MTHFR polymorphisms in 625 healthy blood donors (BDs) and 545 angiographically confirmed CAD patients of Arab origin.
Results.—For the 677 C→T variant within the CAD group, 64.2% were homozygous wild-type C/C, 32.1% were heterozygous C/T, and 3.7% were homozygous T/T genotype. Within the BD group tested for the 677 C→T variant, 72.2% were homozygous wild-type C/C, 25.8% were heterozygous C/T, and 2% were homozygous T/T genotype. Within the CAD group tested for the 1298 A→C variant (n = 540), 45.7% were homozygous wild-type A/A, 46.9% were heterozygous A/C, and 7.4% were homozygous C/C genotype. Within the BD group tested for the 1298 A→C variant (n = 625), 39.4% were homozygous wild-type A/A, 51.5% were heterozygous A/C, and 9.1% were homozygous C/C genotype. The distribution and allele frequency of these 2 MTHFR variants followed the Hardy-Weinberg equilibrium and were similar in the CAD and BD study groups. The prevalence of the 677 C→T and 1298 A→C compound heterozygosity was 9.6% for the BD group and 12.3% for the CAD group.
Conclusion.—The 2 MTHFR variants tested in this study, individually or compound, are not associated with CAD. Therefore, neither of these 2 variants can be considered an independent risk factor or a predictor for CAD in this population.
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Affiliation(s)
- Khaled K Abu-Amero
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia.
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40
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Bain SC, Rippin JD. Complex disease genetics enters the high street. Eur J Clin Invest 2003; 33:186-8. [PMID: 12641534 DOI: 10.1046/j.1365-2362.2003.01107.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- S C Bain
- Birmingham Heartland Hospital, University of Birmingham, School of Medicine, Birmingham, UK.
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