In a group of normal controls and in a group of diabetics subdivided for type we evaluated the following red blood cell parameters: superoxide dismutase (SOD), glutathione peroxidase (GSH.Px), catalase (C-ase), glutathione content (GSH) and membrane-protein-sulphydryl groups (P-SH). There was no difference in the enzymatic activities of superoxide dismutase, glutathione peroxidase and catalase in normals and in the diabetics. However, the erythrocyte GSH content as well as membrane P-SH groups discriminate the normals from diabetics and also the diabetics subdivided for type. None of these parameters was related to the erythrocyte filterability considered as a reflection of the red blood cell deformability. These findings reveal that the diabetic red blood cell is less protected from oxidant agents.
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Bono et al. (1987) studied this question.