Laboratory study reveals enhanced survival and accelerated hematopoiesis following prior skin injury in irradiated mice, suggesting trauma-induced biological protection against radiation.
Skin wounding at 24 h before whole-body 60Co irradiation of mice raised the LD50/30 from 8.09 to 9.71 Gy resulting in a dose reduction factor of 1.2. Concentrations and quantities of myeloproliferative cells were examined at 3, 7, 10, and 14 days after 7 Gy, skin wounding 24 h before 7 Gy and in control non-treated mice. Wounding before irradiation provoked an increase in marrow and splenic clonogenic cells that was earlier and greater than that noted for irradiated mice. Supranormal levels of splenic CFu-s and CFU-c were found in animals wounded before irradiation. M-CFC values were depressed throughout, although greater for combined injured animals than for irradiated mice.
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Ledney et al. (1981) studied this question.
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