利用动物模型评估亚甲蓝光化学法红细胞病毒灭活效果

Evaluation of the effects of methylene blue photochemical viral inactivation of red blood cells by using animal models

目的 评估亚甲蓝光化学法 (MB P) (亚甲蓝浓度 5 μmol/L ,光照时间 1h ,光照强度 380 0 0lux)红细胞病毒灭活的安全性、有效性。方法 ①建立Beagle犬急性失血性贫血模型 ,观察经MB P处理的Beagle犬自体纠正贫血的效果、体内溶血情况及对肝肾功能的影响 ;②将含不同基因组拷贝数的鸭乙肝病毒 (DHBV)的人红细胞经静脉感染 1日龄雏鸭。采用同位素核酸杂交法检测鸭血清中DHBVDNA ,计算病毒灭活前后人红细胞中DHBV的半数致死量 (ID50 ) )。结果 ①经MB P处理的犬自体红细胞输入Beagle犬体内未发生溶血 ,输血前后谷丙转氨酶 (ALT)、谷草转氨酶 (AST)、尿素、肌酐等与输血前比较无明显差异 ;②经MB P灭活处理后 ,含DHBV红细胞的ID50 由 1 0 3 .3 5变为 1 0 8.3 5拷贝。结论 红细胞MB P病毒灭活是安全有效的。

Objective To evaluate the safety and effectis of methylene blue photochemical inactivation of virus in red blood cell (RBC) by using animal models. Methods ①The effects of improving anemia was assessed by transfusing MB P RBC to Beagle’s dog. ②Duck hepatitis B virus(DHBV)was serially diluted and added into human RBC, and then one day old ducklings were inoculated with that treated RBC by intravenous injection. Sera from ducklings were collected and tested by dot hybridization. Infectivity of DHBV (ID 50 ) in RBC was calculated before and after the treatment. Results Dog RBC treated by MB P were not hemolysed after autologous transfusion. There were no changes in serum ALT, AST, BUN, and creatinine after transfusion. The ID 50 contained in RBC changed from 10 3.35 to 10 8.35 after treatment. Conclusion MB P viral inactivation of RBC is safe and effective.