Impact of Reperfusion on the Micronucleus Generation Phenomenon in the Bone Marrow Red Blood Cells in Massive Blood Loss

Abstract

Experiments on non-inbred anesthetized albino male rats weighing 250-350 g have established that blood reperfusion after acute massive blood loss substantially increases the count of micronucleated (MN) erythrocytes in the rat bone marrow by 8.4 times as a whole as compared with the control, which suggests genomic destabilization. The optimum time of elaboration of MN polychromatic erythrocytes is 24 hours after acute blood loss or reinfusion. The intraarterial administration of mexidole (50 mg/kg) just before blood reinfusion drastically decreases the count of MN erythrocytes virtually to the that seen in control animals. The observed effects during micronucleus assay generally correspond to the changes in lipid per-oxidation and overall antioxidative activity, pointing to the free radical mechanism of this phenomenon.