ABSTRACT
Objective To observe the early changes of related indexes after high dose of 60Co γ-ray irradiation on rhesus monkey hematopoietic system.Methods A total of 33 rhesus monkeys were randomly divided into normal control and different irradiation control group,rhesus monkeys in irradiation control group were given different doses(4,8,12 Gy) irradiation to establish acute radiation sickness(ARS) models.XE-2100 automatic blood cell analyzer detected the peripheral blood before and after the irradiation of 3,6,9,12,24,48,80 h.The rhesus monkeys were sacrificed to have a observation of sternum pathological changes at 6,48 and 80 h after 4,8,12 Gy 60Co γ-ray irradiation.Results The number of white blood cell in peripheral blood of the rhesus monkeys after 4 and 8 Gy 60Co γ-ray irradiation were lower than that before irradiation at 3 h after irradiation,as was significant increased at 6 h after irradiation,the highest values were 136.04%.and 221.38% after 9 h(with before irradiation values was 100.00%,the same below),become obviously drooped from 12 h after irradiation,show clearly temporary peak.But the number of white blood cell after 12 Gy 60Co γ-ray irradiation was significant increased at 6 h after irradiation,at the highest of 9 h,become obviously drooped from 12 h after irradiation.Peripheral blood neutrophile count was significant increased at 6 h after irradiation,at the highest of 9 h,become obviously drooped from 12 h after irradiation.Peripheral blood lymphocyte count fell sharply after irradiation,3 h detection value was only 12.02%-25.04% of before irradiation.Sternal bone marrow nucleated cell number decreased sharply after irradiation,the more irradiation dose,the less residual hematopoietic cells.Conclusion In the early stage of BM-ARS,temporary peaktime node of the white blood cell and neutrophil count could be regarded as the best delivery time of hematopoietic cytokine therapy.