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|Type:||Artigo de periódico|
|Title:||Hemoglobin-sulfhydryls from tortoise (Geochelone carbonaria) can reduce oxidative damage induced by organic hydroperoxide in erythrocyte membrane|
|Abstract:||Sulfhydryl groups are important to avoid oxidative damage to the cell. In RBC, tert-butyl hydroperoxide (tert-BOOH) and hydrogen peroxide (H2O2) are capable of oxidizing heme and promoting lipid peroxidation. H2O2 caused greater oxidation of heme than tert-BOOH, although the oxidation of sulfhydryl groups was similar. Geochelone carbonaria Hb, a rich sulfhydryl protein, inhibited the TBA-reactive substances formation of human erythrocytes exposed to tert-BOOH by about 30%; this decrease was smaller with Geochelone denticulata Hb. Sulfhydryl reagents diminished the number of reactive sulfhydryl groups in the G. carbonaria Hb resulting in a decrease of its antioxidant power, suggesting the involvement of sulfhydryls of Hb in the protection against lipid peroxidation. (C) 2000 Elsevier Science Inc. All rights reserved.|
|Editor:||Pergamon-elsevier Science Ltd|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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