研究了30 keV N+注入E.coli诱发的辐射超敏感效应/增强的辐射性(HRS/IRR)及该效应诱发时E.coli细胞内抗氧化物酶(SOD和CAT)的诱导表达,探讨了细胞内抗氧化物酶的诱导与HRS/IRR诱发之间的关联.研究结果显示,HRS诱发剂量范围内(0-5×1014 N+/cm2),E.coli细胞内超氧化物岐化酶(SOD)的酶活基本维持在10 Us/mg的较低水平,过氧化氢敏(CAT)酶活也都低于8 Us/mg;IRR诱发的剂量范围内(5×1014-10×1014N+/cm2),SOD和CAT活性升高并分别达到了58 Us/mg和26 Uc/mg的最高水平.研究结果初步表明,低能离子注入E.coli HRS/IRR的诱发与细胞内抗氧化物酶的诱导关系密切.
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