Effects of large dose vitamin E supplementation on anemia in hemodialysis patients.
In order to clarify the effect of vitamin E (alpha-tocopherol) on anemia and the osmotic fragility of red blood cells (RBC) plasma and RBC levels of vitamin E were measured in 30 regular dialysis patients before and after oral supplementation of vitamin E, 600 mg daily for 30 days. Plasma levels of vitamin E were in the normal range (10.67 +/- 0.85, 9.73 +/- 0.77 microgram/ml) but RBC levels in packed red cells were significantly lower than healthy controls (0.57 +/- 0.05, 0.45 +/- 0.07 microgram/ml). Oral supplementation of vitamin E increased both plasma (20.37 +/- 1.61 micrograms/ml) and RBC vitamin E (1.56 +/- 0.11 micrograms/ml) in packed red cells, while in unsupplemented patients, vitamin E levels remained unchanged. In patients receiving vitamin E, mean osmolarities at the beginning and end of hemolysis decreased from 102.8 +/- 0.9 to 98.9 +/- 0.7 and 72.1 +/- 1.1 to 67.4 +/- 0.8 mosm/l, respectively. In addition, the hematocrit increased from 26.1 +/- 1.0 to 28.1 +/- 1.2%. These changes are statistically significant (less than 0.05). In conclusion, the oral supplementation of vitamin E could be of clinical benefit in correcting anemia in regular dialysis patients by reducing the fragility of RBCs.
D000328:Adult; D000368:Aged; D000740:Anemia / Q000188:drug therapy / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009996:Osmotic Fragility / Q000187:drug effects; D006435:Renal Dialysis / Q000009:adverse effects*; D014810:Vitamin E / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*
D014810:Vitamin E