芥子气全身中毒对小鼠脏器细胞DNA生物合成的影响及抗毒剂的防护作用

EFFECTS OF SYSTEMIC POISONING BY SULPHUR MUSTARD ON CELL DNA BIOSYNTHESIS OF INTERNAL ORGANS AND PROTECTIVE ACTION OF ANTIDOTES IN MICE

应用[~3H]—TdR参入示踪方法,观察芥子气全身中毒对小鼠脏器细胞DNA合成的影响及抗毒剂的防护作用。结果表明,芥子气对脏器细胞DNA合成具有强烈的抑制作用(P<0.01),其抑制作用的规律相似,而程度、时相有显著差异(P<0.05)。抑制作用特点:迅速、严重、恢复迅速,且有超常水平,提示动物机体对DNA烃化损伤具有较强的代偿、再生和修复能力。抗毒剂硫代硫酸钠及其与二巯基丙磺酸钠合用对芥子气吸收中毒引起的脏器细胞DNA合成抑制作用有明显的防护作用。

In this study, we observed the efTects of systemic poisoning by sulphur mustard (SM) on DNA biosynthesis of internal organs and protective action of antidotes in mice.The results showed that the systemic poisoning by SM produced a strong depression of [3H]-TdR incorporation into DNA biosynthesis, which was characterized by rapidity, severity and rapid recovery.It is suggested that mammal an organism has a marked physiological compensation, regeneration and repair activity for DNA damage.Antidote sodium thiosufate alone or in combination with unithiol (DMPS) has satisfactory protective effects on depression of DNA biosynthesis in mice poisoned by SM.