title: Homocysteine lowering effect of different multivitamin preparations in patients with end-stage renal disease.
abstract: OBJECTIVE
  Hyperhomocysteinemia occurs in nearly 100% of patients with end-stage renal disease (ESRD) and is associated with increased morbidity and mortality. Means to reduce elevated homocysteine concentrations is supplementation with folic acid, vitamin B6, and vitamin B12. However, doses of vitamins required for optimized treatment are subject of debate. Therefore, the effect of 2 different multivitamin preparations on the homocysteine concentrations in patients with ESRD were compared.
  
  
  METHODS
  Patients received 3 times per week either 2 tablets of preparation A (800 microg folic acid, 6 microg vitamin B12, 10 mg vitamin B6), 2 tablets of preparation B (160 microg folic acid, no vitamin B12, 10 mg vitamin B6), or placebo for a period of 12 weeks with control of total homocysteine (tHcy) levels at baseline, and at 4, 8, and 12 weeks.
  
  
  METHODS
  The study was performed at the University Hospital of Magdeburg, Germany in patients with ESRD treated with chronic intermittent maintenance hemodialysis.
  
  
  RESULTS
  Preparation A reduced the tHcy concentration significantly by nearly 50%, whereas preparation B did not change the tHcy concentration in comparison with placebo. However, tHcy was not normalized in the majority of patients receiving preparation A.
  
  
  CONCLUSIONS
  The reduction of tHcy achieved by a multivitamin containing 800 microg folic acid was substantial and even higher than the reduction reported in supplementation studies using higher doses of folic acid alone. Nevertheless, hyperhomocysteinemia in ESRD patients appears relatively refractory to vitamin supplementation, in contrast with results obtained in healthy volunteers.
authors: Institute of Clinical Chemistry and Biochemistry, Magdeburg, Germany.
authors: J
authors: J
authors: Dierkes
authors: U
authors: U
authors: Domröse
authors: K P
authors: KP
authors: Bosselmann
authors: K H
authors: KH
authors: Neumann
authors: C
authors: C
authors: Luley
mesh_terms: D019587:Dietary Supplements; D004305:Dose-Response Relationship, Drug; D005260:Female; D005492:Folic Acid / Q000008:administration & dosage*; D006710:Homocysteine / Q000097:blood; D006801:Humans; D020138:Hyperhomocysteinemia / Q000097:blood / Q000188:drug therapy*; D007676:Kidney Failure, Chronic / Q000097:blood* / Q000628:therapy; D008297:Male; D008875:Middle Aged; D011736:Pyridoxine / Q000008:administration & dosage*; D006435:Renal Dialysis / Q000009:adverse effects; D014805:Vitamin B 12 / Q000008:administration & dosage*
chemical_list: D006710:Homocysteine; D005492:Folic Acid; D011736:Pyridoxine; D014805:Vitamin B 12