【摘要】 目的　研究风疹病毒 (rubellavirus ,RV )JR2 3 株感染中枢神经系统 (CNS)特性。方法　RVJR2 3 株体外感染人胚脑神经细胞、腹腔感染Balb/c小鼠 ,观察JR2 3 株在人脑神经细胞的增殖和对不同免疫状态小鼠CNS的感染及由感染导致的神经病理学特征。结果　RVJR2 3 株在人胚脑神经细胞中无明显的致细胞病变作用 ,病毒在感染后的第 72h达最高增殖滴度 10 3 TCID50 /ml。病毒抗原主要分布在人脑神经细胞胞浆。各组小鼠感染RVJR2 3 株后无明显CNS症状 ,地塞米松、环磷酰胺和药物未干预动物组CNSRV感染率分别为 6 0 %、90 %、5 0 %。受RVJR2 3 感染的小鼠脑组织出现小灶性胶质细胞增生及神经元坏死。大脑全层均有病毒抗原的分布。结论　RVJR2 3 株在人脑神经细胞和Balb/c小鼠脑组织中均能形成感染 ,感染为非杀细胞性更多还原

【Abstract】 Objective To investigate the infectious features of rubella virus (RV) JR 23 strain in central nervous system (CNS). Methods RV JR 23 strain infected human primary cerebral neural cell culture in vitro and Balb/c mice, which were given dexamethasone and cytoxan before infection, via peritoneal injection. Viral pathogenecity was observed postinfection and RV antigens were detected in human cerebral neural cells by IFA and immunohistochemical method. Cerebral tissues were observed by HE staining and ABC methods postinfection.Results JR 23 strain didn’t produce cytopathic effect (CPE). The proliferation of JR 23 strain reached highest titer of 10 3TCID 50 /ml at 72 h postinfection and decreased gradually. RV antigens were positive in cerebral neural cells, especially around the nuclei. Focal cytopathic areas were observed in cerebral cortical area and so did neuron necrosis around by gliacytes formed stellitorsis, neuronophagia and glial nodule. RV antigens could be seen in all cerebral area, but most localized in cortical area. Pathological features were basically the same among the infected groups. The infection rates of de xamethasone, cytoxan group and the group without intervention were 60%、90% and 50%, repectively. Conclusion RV JR 23 strain is not cytocidal to human neural cells and the pathological lesions induced by JR 23 strain in CNS of mice are mainly focal or dotted neuron necrosis.更多还原