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Pyridoxine improves endothelial function in cardiac transplant recipients

S E Miner1, D E Cole, J Evrovski

  • 1Department of Medicine, University of Toronto, Toronto, Ontario, Canada.

The Journal of Heart and Lung Transplantation : the Official Publication of the International Society for Heart Transplantation
|September 15, 2001
PubMed

Insights

Pyridoxine supplementation significantly improved endothelial function in cardiac transplant recipients, unlike folate. This suggests pyridoxine may help prevent transplant coronary artery disease by enhancing vascular health.

Area of Science:

  • Cardiology
  • Transplantation Medicine
  • Vascular Biology

Background:

  • Endothelial dysfunction is prevalent in cardiac transplant recipients and a predictor of transplant coronary artery disease.
  • Hyperhomocysteinemia, common in transplant recipients, is linked to endothelial dysfunction and transplant coronary artery disease.
  • Therapies reducing homocysteine may improve endothelial function and mitigate transplant coronary artery disease risk.

Purpose of the Study:

  • To investigate the impact of folate or pyridoxine supplementation on endothelial function in cardiac transplant recipients.

Main Methods:

  • A double-blind, randomized, placebo-controlled trial involving 31 cardiac transplant recipients.
  • Participants were assigned to receive pyridoxine (100 mg/day), folate (5 mg/day), or placebo for 10 weeks.
  • Endothelial function was assessed using brachial artery flow-mediated dilatation; homocysteine levels were also measured.

Main Results:

  • Pyridoxine supplementation led to a significant improvement in endothelial function.
  • No significant changes in homocysteine concentrations were observed in any group.
  • Folate supplementation or placebo did not result in significant changes in endothelial function.

Conclusions:

  • Pyridoxine supplementation, but not folate, significantly enhances endothelial function in cardiac transplant recipients.
  • These findings suggest a potential therapeutic role for pyridoxine in managing endothelial dysfunction post-cardiac transplantation.
Abstract

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