Tamai H, Miki M, Mino M. Hemolysis and membrane lipid changes induced by xanthine oxidase in vitamin E deficient red cells.
JOURNAL OF FREE RADICALS IN BIOLOGY & MEDICINE 1986;
2:49-56. [PMID:
3021841 DOI:
10.1016/0748-5514(86)90123-6]
[Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A procedure to induce hemolysis by the hypoxanthine-xanthine oxidase reaction was developed and applied to vitamin E deficient red blood cells (RBCs) in rats. The reaction system was as follows: 0.16 mM hypoxanthine, 0.05 U/ml xanthine oxidase in 2.5% RBC suspensions with an isotonic buffer (pH 7.4) containing 10 mM phosphate buffer and 125 mM saline (277 mOsm). Hemolysis was observed to depend on the vitamin E concentrations in the RBCs. Hemolysis was inhibited by catalase but not by SOD. After the reaction with vitamin E deficient RBCs, an increase in TBARS in the aqueous phase of the reaction mixture was observed. This accompanied the increase in fluorescent substances in the lipid extracts, in association with a significant decrease in the PE and PS of the RBCs, and a decrease in arachidonic acid in membrane lipids. The above changes were almost completely inhibited by tocopherol incorporated into vitamin E deficient RBCs.
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