Accumulation of pro-aggregation substances in the incubation medium of isolated UV-irradiated rabbit leukocytes showed stronger correlation with photo-induced apoptotic death of leukocytes (r=0.92) than with their photo-induced necrotic death (r=0.70). It can be suggested that pro-aggregation substances release form leukocytes exposed to irradiation during preparation of these cells to apoptosis after UV irradiation.
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