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| Research article summary (published 30 Jan 2003): |
Alzheimer's disease and total plasma aminothiols.
Full Abstract
BACKGROUND:
Plasma homocysteine is elevated in Alzheimer's disease, but little is known regarding levels of related aminothiols in the disease. We therefore determined total plasma homocysteine, cysteine, and glutathione levels in patients and control subjects and investigated their relationship with cognitive scores.
METHODS:
We performed a prospective, case-controlled survey based in two UK Psychogeriatric Assessment Centres. Fifty patients with features compatible with DSM-IV criteria for primary degenerative dementia of Alzheimer type were recruited together with 57 cognitively intact age- and gender-matched control subjects. Mini-Mental State and Alzheimer's Disease Assessment Scale-Cognitive Subsection (ADAS-Cog) scores were determined for patients and control subjects. Aminothiols were assayed with an automated high-performance liquid chromatography (HPLC) system.
RESULTS:
Patients had significantly elevated total plasma homocysteine (p <.001) and cysteine (p <.01), but there were no group differences for total plasma glutathione. Glutathione was, however, a highly significant and independent predictor of cognitive scores in patients (p =.002); lower plasma levels were associated with more severe cognitive impairment.
CONCLUSIONS:
Total plasma homocysteine and cysteine are elevated in Alzheimer's disease, suggesting intact transsulphuration but defective remethylation of homocysteine in the disease. Total plasma glutathione levels in patients correlate with cognitive scores. Taken together, these observations perhaps reflect the differential effects of Alzheimer's disease-related oxidative stress on the two key pathways of homocysteine metabolism.
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Author information
Author/s: McCaddon, Andrew (A); Hudson, Peter (P); Hill, Diane (D); Barber, Joan (J); Lloyd, Alwyn (A); Davies, Gareth (G); Regland, Björn (B);
Affiliation: University of Wales College of Medicine, Wrexham, UK.
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: Biological psychiatry (Biol Psychiatry), published in United States. (Language: eng)
Reference: 2003-Feb; vol 53 (issue 3) : pp 254-60
Dates: Created 2003/01/31; Completed 2003/07/03; Revised 2006/11/15;
PMID: 12559659, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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