title: Lack of effect of oral N-acetylcysteine on the acute dialysis-related lowering of total plasma homocysteine in hemodialysis patients.
abstract: Hyperhomocysteinemia refractory to standard B-vitamin supplementation treatment persists in > or = 75% of maintenance dialysis patients, potentially increasing their risk for atherothrombotic sequelae. We examined whether predialysis administration of oral N-acetylcysteine (NAC), which acutely increases the non-protein bound, dialyzable fraction of plasma homocysteine, might augment the homocysteine-lowering effect of dialysis therapy. Predialysis and postdialysis total plasma homocysteine levels were determined on a control day, and on a day in which oral NAC (1200 mg) was administered predialysis in n = 11 maintenance hemodialysis patients. Although NAC treatment had no significant effect on hemodialysis removal of plasma homocysteine (P = 0.594), we observed a 16% reduction (P = 0.033) in non-fasting prehemodialysis total plasma homocysteine on the NAC treatment vs. non-treatment day. Longer term, placebo-controlled confirmation of this finding will be required to evaluate the possible chronic homocysteine-lowering efficacy of NAC treatment in hemodialysis patients.
authors.affiliation: Vitamin Bioavailability Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts New England Medical Center, Boston, MA 02111, USA.
authors.forename: A G
authors.initials: AG
authors.lastname: Bostom
authors.forename: D
authors.initials: D
authors.lastname: Shemin
authors.forename: D
authors.initials: D
authors.lastname: Yoburn
authors.forename: D H
authors.initials: DH
authors.lastname: Fisher
authors.forename: M R
authors.initials: MR
authors.lastname: Nadeau
authors.forename: J
authors.initials: J
authors.lastname: Selhub
mesh_terms: D000111:Acetylcysteine / Q000008:administration & dosage / Q000494:pharmacology*; D000284:Administration, Oral; D000328:Adult; D000368:Aged; D001161:Arteriosclerosis / Q000097:blood / Q000209:etiology / Q000517:prevention & control*; D005260:Female; D006710:Homocysteine / Q000097:blood*; D006801:Humans; D007676:Kidney Failure, Chronic / Q000097:blood* / Q000150:complications / Q000628:therapy; D008297:Male; D008875:Middle Aged; D006435:Renal Dialysis
chemical_list: D006710:Homocysteine; D000111:Acetylcysteine