title: [Treatment of hyperhomocysteinemia and endothelial dysfunction in renal-transplant recipients with vitamin B].
abstract: OBJECTIVE
  To study the effect of vitamin B on treatment of hyperhomocysteinemia and endothelial dysfunction in renal-transplant recipients.
  
  
  METHODS
  Thirty-six stable hyperhomocysteinemic renal-transplant recipients were randomly assigned to vitamin treatment (group A, n = 18, folic acid 5 mg/d, vitamin B(6) 50 mg/d, B(12) 1000 microg/d) or controlled group (group B, n = 18) for 6 months. All subjects underwent assessment of levels for creatinine, creatinine clearance, average pressure, total cholesterol, triglyceride and fasting homocysteine. Endothelial function was evaluated using high-resolution vascular ultrasound.
  
  
  RESULTS
  The levels of homocysteine markedly decreased in group A [(13 +/- 4) micromol/L vs (20 +/- 5) micromol/L, t = 5.3, P < 0.01] after treatment, whereas no significant changes were observed in group B. In group A, endothelium dependent [(12 +/- 5)% vs (9 +/- 5)%, t = 2.9, P < 0.01] and independent [(18 +/- 4)% vs (12 +/- 5)%, t = 3.4, P < 0.01] vasodilatation responses significantly increased after treatment, no significant changes were observed in group B. Endothelium dependent [(9 +/- 6)%, t = 2.8, P < 0.01] and independent [(12 +/- 5)%, t = 3.5, P < 0.01] vasodilatation responses of group A were significantly lower than that of group B after treatment.
  
  
  CONCLUSIONS
  Vitamin B supplementation can reduce the levels of homocysteine and improve the endothelial function in hyperhomocysteinemic renal-transplant recipients.
authors.affiliation: Department of Urology, Peking University People's Hospital, Beijing 100044, China. tx-bj@vip.sina.com
authors.forename: Tao
authors.initials: T
authors.lastname: Xu
authors.forename: Xiao-feng
authors.initials: XF
authors.lastname: Wang
authors.forename: Xing-ke
authors.initials: XK
authors.lastname: Qu
authors.forename: Hai-yun
authors.initials: HY
authors.lastname: Ye
authors.forename: Xiao-bo
authors.initials: XB
authors.lastname: Huang
authors.forename: Xiao-peng
authors.initials: XP
authors.lastname: Zhang
authors.forename: Shu-kun
authors.initials: SK
authors.lastname: Hou
mesh_terms: D000328:Adult; D004359:Drug Therapy, Combination; D004730:Endothelium, Vascular / Q000187:drug effects* / Q000503:physiopathology; D005260:Female; D005492:Folic Acid / Q000008:administration & dosage*; D006801:Humans; D020138:Hyperhomocysteinemia / Q000188:drug therapy* / Q000503:physiopathology; D016030:Kidney Transplantation; D008297:Male; D008875:Middle Aged; D016896:Treatment Outcome; D014805:Vitamin B 12 / Q000008:administration & dosage*; D025101:Vitamin B 6 / Q000008:administration & dosage*
chemical_list: D025101:Vitamin B 6; D005492:Folic Acid; D014805:Vitamin B 12