Antioxidant supplementation may improve renal transplant function: a preliminary report

Area of Science:

• Nephrology
• Transplant Surgery
• Nutritional Science

Background:

• Renal graft dysfunction can result from rejection, ischemia-reperfusion injury, and calcineurin inhibitor nephrotoxicity.
• Oxidative stress and lipid peroxidation contribute to graft damage.
• Vitamins C (ascorbic acid) and E (alpha-tocopherol) are potent antioxidants with potential to mitigate these effects.

Purpose of the Study:

• To investigate the clinical efficacy of vitamin C and/or vitamin E supplementation in improving renal transplant function.
• To assess the impact of antioxidants on serum creatinine levels in kidney transplant recipients.

Main Methods:

• A case series of five renal transplant recipients supplemented with vitamin C (500 mg/day), vitamin E (500 mg/day), or both.
• Serum creatinine levels were monitored before and after a 1- to 3-month supplementation period.
• One patient's response to temporary cessation and reinitiation of vitamin E was documented.

Main Results:

• Serum creatinine levels decreased by over 20% in all supplemented patients after 1 to 3 months.
• One patient experienced a >50% increase in serum creatinine upon vitamin E cessation, which reversed upon reinitiation.
• These findings suggest a potential benefit of antioxidant supplementation.

Conclusions:

• Antioxidant supplementation with vitamins C or E may enhance renal transplant function.
• This benefit may be particularly relevant for grafts from marginal donors.
• Further clinical trials are warranted to confirm these preliminary findings.