Hemolytic effects of dehydroepiandrosterone in vitro

Dehydroepiandrosterone (DHEA), a major steroid secreted by the adrenal gland which decreases with age after adolescence, is available as a over-the-counter product. This study demonstrates that DI-IEA induced lysis of human red blood cells (RBCs) in a concentration-dependent manner, with ca. 70 % hemolysis at 2 mM DHEA at 37 degrees C for 1 hr. Hemolysis induced by 2 mM DHEA was rapid and involved neither hemoglobin oxidation nor lipid peroxidation. The hemolysis was also not inhibited by addition of EDTA, catalase, superoxide dismutase, glucose or a radical scavenger including mannitol, dimethylsulfoxide and a-tocopherol, indicating a nonoxidative mechanism. RBCs stored overnight before incubation with DHEA were hemolyzed to a lesser extent than the freshly prepared RBCs. Light microscopy of the fresh RBCs following l-h incubation with 2 mM DHEA revealed thickened and cup-shaped deformity of the membranes, suggesting a change in the membrane structure possibly due to the intercalation of the steroid into the membranes.