Vitamin E-coated dialyzer and antioxidant defense parameters: three-month study

Area of Science:

• Nephrology
• Cardiovascular Medicine
• Biochemistry

Background:

• End-stage renal disease (ESRD) patients undergoing dialysis face high mortality from atherosclerotic cardiovascular disease.
• Oxidative stress and impaired antioxidant systems accelerate atherosclerosis in chronic renal failure patients.
• Dialysis treatment itself may contribute to oxidative stress.

Purpose of the Study:

• To evaluate the impact of a vitamin E-coated dialyzer on antioxidant defense parameters in hemodialysis (HD) patients.
• To assess changes in erythrocyte antioxidant enzymes, plasma antioxidant capacity, and oxidative stress markers.

Main Methods:

• A 3-month study involving 14 HD patients using a vitamin E-coated dialyzer.
• Measurements included erythrocyte antioxidant enzymes (SOD, GPX, GR, CAT), plasma total antioxidant capacity (TAC), RBC glutathione (GSH), plasma malondialdehyde (MDA), and vitamin E levels.
• Parameters were assessed at baseline, monthly, and 10 weeks post-interruption.

Main Results:

• Vitamin E-coated dialyzer use significantly decreased plasma MDA levels.
• Plasma TAC, RBC GSH, and vitamin E levels (plasma and RBC) significantly increased.
• These improvements reverted to near baseline levels after discontinuing the vitamin E-coated dialyzer.

Conclusions:

• Vitamin E-coated dialyzers demonstrate a beneficial effect in combating oxidative stress in hemodialysis patients.
• This intervention may help mitigate accelerated atherosclerosis in ESRD patients.
• The positive effects are dependent on continued use of the vitamin E-coated dialyzer.