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Items for "folate"

Association of homocysteine (but not of MTHFR 677 C>T, MTR 2756 A>G, MTRR 66 A>G and TCN2 776 C>G) with ischaemic cerebrovascular disease in Sicily

Association between methylenetetrahydrofolate reductase polymorphism (MTHFR 677 C>T ), a determinant of homocysteine plasma level (t-Hcys), with ischaemc cerebrovascular disease (iCVD) seems to be neutral in North Europe and North America...

Keywords: Cerebrovascular disease, folate, homocysteine, methionine synthase reductase, methylenetetrahydrofolate reductase, transcobalamin

08/2006 | Thrombosis and Haemostasis, Schattauer
Associations of common polymorphisms in the thymidylate synthase, reduced folate carrier and 5-aminoimidazole-4-carboxamide ribonucleotide transformylase/inosine monophosphate cyclohydrolase genes with folate and homocysteine levels and venous thrombosis

Background: Folate is important in purine and thymidylate synthesis and, via homocysteine remethylation, facilitates S-adenosylmethionine-dependent transmethylation...

Keywords: folate, homocysteine, polymorphisms, recurrent venous thrombosis

04/2007 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Methylenetetrahydrofolate reductase gene A222V polymorphism and risk of ischemic stroke

The 5,10-methylenetetrahydrofolate reductase (MTHFR) gene 677C?T polymorphism causes an A222V amino acid change which affects MTHFR enzyme activity and can increase homocysteine, a vascular disease risk factor...

Keywords: elderly, folate, methylenetetrahydrofolate reductase (MTHFR), mutation, Polymorphism, Stroke

12/2004 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Homocysteine, vitamin B12 and folate in vascular dementia and in Alzheimer disease

The association between elevated plasma levels of homocysteine (Hcy) and nutritional status has been shown in Alzheimer disease (AD) patients and also in vascular dementia (VaD)...

Keywords: Alzheimer disease, folate, homocysteine, vascular dementia, vitamin B12

09/2004 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Vitamin B12 deficiency is the dominant nutritional cause of hyperhomocysteinemia in a folic acid-fortified population

Prevalence rates for folate deficiency and hyperhomocysteinemia have been markedly reduced following the introduction of folic acid fortification in the United States...

Keywords: folate, fortification, homocysteine, transcobalamin, vitamin B12, PAR%, population attributable risk percentage, SALSA, Sacramento Area Latino Study on Aging

10/2005 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Homocysteine, folic acid and vitamin B12 in relation to pre- and postnatal health aspects

Studies linking hyperhomocysteinemia (HHCY) and B-vitamin deficiency to some health aspects in children have been accumulating...

Keywords: folate, homocysteine, Pediatrics, vitamin B12

10/2005 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Betaine: a key modulator of one-carbon metabolism and homocysteine status

Betaine serves as a methyl donor in a reaction converting homocysteine to methionine, catalysed by the enzyme betaine-homocysteine methyltransferase...

Keywords: betaine, choline, dimethylglycine, folate, homocysteine

10/2005 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Homocysteine and B vitamins in mild cognitive impairment and dementia

Elderly subjects with mild cognitive impairment have a high risk for conversion to Alzheimer's disease or are already in a preclinical dementia stage...

Keywords: dementia, folate, homocysteine, mild cognitive impairment, vitamin B12

10/2005 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Homocysteine, type 2 diabetes mellitus, and cognitive performance: The Maine-Syracuse Study

Type 2 diabetes mellitus and higher total plasma homocysteine concentrations are each associated with an increased incidence of cardiovascular disease and with diminished cognitive performance...

Keywords: cardiovascular risk factors, cognitive performance, Diabetes mellitus, folate, homocysteine, vitamin B12, vitamin B6

10/2005 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Concentrations of homocysteine, related metabolites and asymmetric dimethylarginine in preeclamptic women with poor nutritional status

Background: Hyperhomocysteinemia, a proxy measure for the nutritional status of the B vitamins, may be involved in the etiology of preeclampsia via inducing endothelial dysfunction...

Keywords: asymmetric dimethylarginine, folate, homocysteine, preeclampsia

10/2005 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Interactions between folate and aging for carcinogenesis

Inadequate folate intake and aging are each strongly implicated as important risk factors for certain cancers...

Keywords: aging, carcinogenesis, DNA methylation, folate, one-carbon metabolism, uracil misincorporation into DNA

10/2005 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
The potential cocarcinogenic effect of vitamin B12 deficiency

Since vitamin B12 serves as a cofactor in the synthesis of methyl precursors for biological methylation and enables methylfolate to be recycled for nucleotide synthesis, B12 deficiency has been known to induce hyperhomocysteinemia and inadequate DNA synthesis, along with “methylfolate trap”...

Keywords: Cancer, DNA methylation, folate, one-carbon metabolism, uracil misincorporation into DNA, vitamin B12

10/2005 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Quantitative determination of erythrocyte folate vitamer distribution by liquid chromatography-tandem mass spectrometry

Background: Given the role of folate in many disorders, intracellular distribution of folate vitamers is of potential clinical importance...

Keywords: erythrocyte, folate, folate vitamer, liquid chromatography, Mass spectrometry

04/2006 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
The effects of adrenocorticotrophic hormone and cortisol on homocysteine and vitamin B concentrations

Background: Homocysteine metabolism is mainly governed by serum concentrations of folate and vitamin B12, renal function and genetic factors...

Keywords: cobalamines, corticotropin, cortisol, folate, homocysteine, steroids

05/2006 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Hyperhomocysteinaemia and immune activation in patients with cancer

Background: Recently, homocysteine production was observed in tumour cell lines and homocysteine was proposed as a tumour marker...

Keywords: Cancer, cysteine, folate, homocysteine, inflammation, neopterin, vitamin B12

01/2007 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Hyperhomocysteinemia and cardiovascular risk in postmenopausal women: the role of folate supplementation

In the postmenopausal period, cardiovascular diseases are a frequent chronic condition leading to high risk of myocardial infarction and death...

Keywords: cardiovascular disease, endothelium, folate, homocysteine, postmenopausal

02/2007 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Association of vitamin B12, folate and homocysteine with functional and pathological characteristics of the elderly in a mountainous village in Sicily

Background: Homocysteine is associated with age, folate and vitamin B12...

Keywords: aging, folate, peripheral arteriopathy, Stroke, vitamin B12

02/2007 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Association of thyroid dysfunction with vitamin B12, folate and plasma homocysteine levels in the elderly: a population-based study in Sicily

Background: Association of thyroid dysfunction with plasma homocysteine levels and vitamin B12 has previously been reported...

Keywords: folate, homocysteine, thyroid dysfunction, vitamin B12

02/2007 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Evaluation of cardiovascular risk factors and related clinical markers in healthy young Japanese adults

Background: Since atherosclerosis is a slowly progressive process at a young age, effective preventive measures should be taken early in life to prevent future events associated with cardiovascular disease.

Methods: The study population comprised 132 young Japanese adults (mean age 21.4 years, range 18–31 years)...

Keywords: atherosclerosis, cardio-ankle vascular index, carotid intima-media thickness, folate, homocysteine, young adults

02/2007 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
International Standard for serum vitamin B12 and serum folate: international collaborative study to evaluate a batch of lyophilised serum for B12 and folate content

Background: Vitamin B12 and folate measurements in serum show wide inter-methodology variability...

Keywords: folate, liquid chromatography coupled to isotope-dilution tandem mass spectrometry (LC/MS/MS), 5-methyl tetrahydrofolic acid (5MeTHF), reference, standardisation, vitamin B12

03/2007 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Plasma protein homocysteinylation in uremia

Protein homocysteinylation is proposed as one of the mechanisms of homocysteine toxicity...

Keywords: Albumin, folate, Hemodialysis, homocysteine, protein homocysteinylation, uremia

12/2007 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Defects in homocysteine metabolism: diversity among hyperhomocyst(e)inemias

There are now four genetic mouse models that induce hyperhomocyst(e)inemia by decreasing the activity of an enzyme involved in homocysteine metabolism: cystathionine ?-synthase, methylenetetrahydrofolate reductase, methionine synthase and methionine synthase reductase...

Keywords: adenosylhomocysteine, adenosylmethionine, cystathionine ?-synthase, folate, genetic mouse models, homocysteine, methionine synthase, methionine synthase reductase, methylenetetrahydrofolate reductase

12/2007 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Biomarkers of folate and vitamin B12 status in cerebrospinal fluid

Folate and vitamin B12 are essential cofactors for the methionine/homocysteine cycle in the brain...

Keywords: cobalamin, folate, homocysteine, methyl

12/2007 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Importance of folate-homocysteine homeostasis during early embryonic development

Although the beneficial effects of maternal folate supplementation in the periconceptional period have been shown to prevent neural tube defects, congenital heart defects and orofacial clefts, the exact protective mechanism of folates remains unknown...

Keywords: birth defects, congenital heart defects, folate, folate receptor autoantibody, folate receptor, FOLR1, homocysteine, homocysteinylation, neural tube defects, SLC19A1

12/2007 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
The effect of B-vitamins on biochemical bone turnover markers and bone mineral density in osteoporotic patients: a 1-year double blind placebo controlled trial

Background: Hyperhomocysteinemia is a new risk factor for osteoporosis...

Keywords: bone mineral density, C-terminal telopeptides of collagen I (CTx), folate, homocysteine, osteocalcin, pro-collagen type I N-terminal peptide (PINP), tartrate-resistant acid phosphatase (TRAP), urinary desoxypyridinoline cross-links (DPD), vitamin B6, vitamin B12

12/2007 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Management of L-Dopa related hyperhomocysteinemia: catechol-O-methyltransferase (COMT) inhibitors or B vitamins? Results from a review

In recent years, L-Dopa treatment has been indicated as an acquired cause of hyperhomocysteinemia (HHcy)...

Keywords: cobalamin, entacapone, folate, homocysteine, L-dopa, tolcapone

12/2007 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Quantitative profiling of folate and one-carbon metabolism in large-scale epidemiological studies by mass spectrometry

Background: Derangements of one-carbon metabolism have been related to the development of chronic diseases...

Keywords: choline, folate, Mass spectrometry, one-carbon metabolism, riboflavin, vitamin B6

12/2007 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
The role of hyperhomocysteinemia as well as folate, vitamin B6 and B12 deficiencies in osteoporosis – a systematic review

Hyperhomocysteinemia (HHCY) has been suggested as a new risk factor for osteoporosis...

Keywords: bone metabolism, folate, homocysteine, Osteoporosis, vitamin B6, vitamin B12

12/2007 | Clinical Chemical Laboratory Medicine, Walter de Gruyter
Small ubiquitin-like modifier-1 (SUMO-1) modification of thymidylate synthase and dihydrofolate reductase

Background: Impairments in folate-mediated one-carbon metabolism are associated with pathologies and developmental anomalies, including cardiovascular disease, cancer, neurological disorders and neural tube defects...

Keywords: cytoplasmic serine hydroxymethyltransferase, dihydrofolate reductase, folate, small ubiquitin-like modifier (SUMO), thymidylate, thymidylate synthase

12/2007 | Clinical Chemical Laboratory Medicine, Walter de Gruyter