Objective: To identify the real number of hyperhomocysteinemic Alzheimer's patients who may benefit from homocysteine-lowering therapy.
Methods: Basal and post-methionine load homocysteine levels were assessed by rp-HPLC system.
Results: PML test revealed twice as many hyperhomocysteinemic AD subjects with respect to the fasting analysis.
Conclusion: PML test resulted useful in detecting higher number of hyperhomocysteinemic AD patients who may have the chance of an early folate treatment.
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http://dx.doi.org/10.1016/j.clinbiochem.2008.03.015 | DOI Listing |
PLoS Genet
March 2014
Center for Public Health Genomics, University of Virginia, Charlottesville, Virginia, United States of America; Department of Medicine, University of Virginia, Charlottesville, Virginia, United States of America; Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, Virginia, United States of America.
Circulating homocysteine levels (tHcy), a product of the folate one carbon metabolism pathway (FOCM) through the demethylation of methionine, are heritable and are associated with an increased risk of common diseases such as stroke, cardiovascular disease (CVD), cancer and dementia. The FOCM is the sole source of de novo methyl group synthesis, impacting many biological and epigenetic pathways. However, the genetic determinants of elevated tHcy (hyperhomocysteinemia), dysregulation of methionine metabolism and the underlying biological processes remain unclear.
View Article and Find Full Text PDFEur J Ophthalmol
November 2014
DINOGMI, Laboratory of Metabolic Diseases, University of Genova, Istituto Giannina Gaslini, Genova - Italy.
Purpose: To evaluate total plasma homocysteine (HCY) during fasting and post methionine load test (MLT), serum folate, serum vitamin B12, and methylenetetrahydrofolate reductase (MTHFR) mutation in patients with retinal vein occlusion (RVO) and to examine the association between these risk factors and 2 subtypes of RVO: central (CRVO) and branch (BRVO).
Methods: This case-control study included 91 Italian patients presenting a first RVO and 71 healthy subjects, matched by age, without history of thromboembolic diseases, glaucoma, or malignancy. Homocysteine fasting and after MLT, serum folate level, serum vitamin B12 level, and other laboratory tests were assessed.
Nutrients
September 2013
Department of Clinical Chemistry, University Hospital of the Saarland, D-66424, Homburg, Germany.
Methyl groups are important for numerous cellular functions such as DNA methylation, phosphatidylcholine synthesis, and protein synthesis. The methyl group can directly be delivered by dietary methyl donors, including methionine, folate, betaine, and choline. The liver and the muscles appear to be the major organs for methyl group metabolism.
View Article and Find Full Text PDFCardiovasc Diabetol
July 2012
Biochemistry Unit, Canterbury Health Laboratories, PO Box 151, Christchurch, 8140, New Zealand.
Background: Since betaine is an osmolyte and methyl donor, and abnormal betaine loss is common in diabetes mellitus (>20% patients), we investigated the relationship between betaine and the post-methionine load rise in homocysteine, in diabetes and control subjects. The post-methionine load test is reported to be both an independent vascular risk factor and a measure of betaine sufficiency.
Methods: Patients with type 2 diabetes (n = 34) and control subjects (n = 17) were recruited.
Thromb Res
October 2011
Regional Reference Centre for Coagulation Disorders, Department of Clinical and Experimental Medicine, Federico II University, Naples, Italy.
Background: Methionine ingestion (100mg/kg) identifies subjects in whom fasting total homocysteine (tHcy) may be normal but the post-methionine load (PML) tHcy is abnormally high.
Methods: In 96 subjects [54 M/42 F, 40.4 ± 12.
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