应用Q SepharoseFastFlow对Vero细胞基质制备的I型口服脊髓灰质炎减毒活疫苗悬液进行纯化。病毒液经滤过澄清和超滤浓缩 ,获得 85%的病毒感染性滴度回收率 ,而经Q SepharoseF .F .纯化的病毒悬液 ,病毒感染性滴度回收率达 10 0 %。纯化后的病毒液用 32 PdATP标记DNA探针膜杂交法测定 ,宿主Vero细胞基质DNA残余含量远低于 10 0 pg/剂量的标准 ;rct/ 4 0特征、病毒形态及病毒衣壳蛋白组份等生物学性状无显著变化。研究结果提示 ,Q SepharoseF .F .是Vero细胞制备口服脊髓灰质炎减毒疫苗的理想纯化材料。

Q Sepharose F.F. was adopted to purify the suspension of oral poliovaccine (OPV), which is prepared from Vero cells. After clarification and concentration by ultrafiltration, the recovery of virus infected titre may attain above 85%. Using column chromatography on Q Sepharose F.F. to purify the concentrated virus suspension, the purified viruses attain 100% recovery of virus infectivity. Dot membrane hybridization was used to detect DNA with the probe of Vero cell genome DNA which was labed with 32 P dATP, the contents of residual substrate DNA was less than 100 pg/dose. The process of downstream had no significant influence on some biologiccal characters of purified viruses, such as virus morphology, tumorigenicity, rct/40 character and capsid protein. The results indicate that Q Sepharose F.F. is an ideal chromatography material for purifying OPV prepared from Vero cells.