一、二类猝灭剂对病毒灭活和红细胞损伤的影响

目的　研究羟自由基 (一类机制 )、单线态氧 (二类机制 )在DMMB与M0 0 7光化学灭活病毒和对红细胞损伤中的作用。方法　在光化学反应体系中加入羟自由基猝灭剂甘露醇、甘油 ,单线态氧猝灭剂色氨酸和叠氮钠 ,试验它们对灭活Phi6噬菌体的抑制能力以及对红细胞溶血、钾泄漏的防护作用。结果　单线态氧猝灭剂可以明显抑制DMMB和M0 0 7光化学灭活Phi6噬菌体的能力 ,羟自由基猝灭剂对灭活Phi6噬菌体影响很小 ,而两类猝灭剂都对红细胞溶血有一定的防护作用。结论　DMMB、M0 0 7主要通过二类机制来灭活病毒 ,一、二类机制都参与了对红细胞的损伤。

Effect of type Ⅰ and type Ⅱ quenchers on virus inactivation and red cell cytotoxicity

Objective To research the effect of Hydroxyl radical(type Ⅰ mechanism)and singlet oxygen(type Ⅱ mechanism)on virus inactivation and red cell cytotoxicity induced by DMMB and M007 phototreatment.Methods Hydroxyl radical quenchers mannitol and glycerol,singlet oxygen quenchers sodium azide and tryptophan were employed to investigated their ability to inhibit the inactivation of bacteriophage Phi6 and red cell cytotoxicity by induced DMMB and M007 phototreatment.Results Singlet oxygen quenchers could inhibit the inactivation of bacteriophage Phi6 obviously, whereas hydroxyl quenchers hardly affect the inactivation of bacteriophage Phi6.Both type of quenchers could reduce the hemolysis caused by CMMB or M007 phototreatment.Conclusion Viral inactivation of DMMB and M007 phototreatment is mainly through type Ⅱ mechanism, both type I and type Ⅱ mechanisms contribute to red cell cytotoxicity.