3-OMD and homocysteine plasma levels in parkinsonian patients
Rent the article at a discountRent now
* Final gross prices may vary according to local VAT.Get Access
One main metabolizing pathway of levodopa is O-methylation to 3-O-methyldopa (3-OMD) by catechol-O-methyltransferase (COMT). Since COMT requires Mg2+ and S-adenosylmethionine as methyl donor for this transmethylating process, COMT converts S-adenosylmethionine to S-adenosylhomocysteine and subsequent homocysteine. Objective of this study was to demonstrate relations between plasma levodopa, 3-OMD and total homocysteine in treated parkinsonian subjects. We measured homocysteine, levodopa and 3-OMD by HPLC. We compared plasma homocysteine in two groups of treated parkinsonian subjects subdivided according to their 3-OMD level. Homocysteine was significantly (p = 0.002) elevated in the group with higher 3-OMD concentrations and positively (r = 0.52, p = 0.0006) correlated to 3-OMD. Homocysteine induces vascular disease. Previous studies showed an increase of ischaemic heart- and cerebrovascular disease in treated parkinsonian patients.
- 3-OMD and homocysteine plasma levels in parkinsonian patients
Journal of Neural Transmission
Volume 109, Issue 2 , pp 175-179
- Cover Date
- Print ISSN
- Online ISSN
- Additional Links
- Keywords: Homocysteine
- Parkinson's disease.
- Industry Sectors