摘要
目的 观察先天性人巨细胞病毒(HCMV)潜伏感染至老年,对小鼠大脑皮质细胞凋亡的影响。方法 选择鼠龄为24个月HCMV先天性感染中枢神经系统模型小鼠。分为3组,每组6只,分别为:HCMV先天性潜伏感染老年鼠组(潜伏感染组)、HCMV先天性潜伏再激活感染老年鼠组(潜伏再激活感染组)和健康对照老年鼠组(健康对照组)。采用透射电镜、TUNEL法和流式细胞仪检测分析各组小鼠大脑皮质细胞凋亡情况。结果 电镜检测发现,同健康对照组比较,潜伏感染组和潜伏再激活感染组部分神经元细胞核染色体固缩、核物质碎片化、凋亡小体形成等特征性凋亡改变。TUNEL法和流式细胞仪检测发现健康对照组凋亡细胞最少,潜伏感染组凋亡细胞比率较健康对照组升高,而潜伏再激活感染组凋亡细胞最多;t检验潜伏感染组、潜伏再激活感染组与健康对照组凋亡率比较,差异均有统计学意义(均为P〈0.01)。结论 先天性感染HCMV后长期潜伏在小鼠的大脑皮质,至老年后可诱导细胞凋亡。
Objective To investigate the cell apoptosis in cerebral cortex caused by human eytomegalovirus (HCMV) congenital latent infection in elderly mouse. Methods The 24-months-old mice model with HCMV congenital latent infection in cerebral tissue was established. Eighteen mice were classified into three groups (n= 6, respectively) : group A for HCMV congenital latent infection, group B for HCMV reactivated infection and group C for control. The electron microscope, TUNEL and flow eytometry (FCM) were used for cell apoptosis detection. Results By electron microscope, some ehromosome shrinking in cerebral cortex, nucleolar fragments and apoptotic body were observed in group A and B, but seldom found in group C. Through TUNEL and FCM, the ratio of apoptosis cells in group C [(1.75±0. 31)%] were much lower than in group A[(4. 83±0.96)%] and B[(10.09 ± 1.18) %] (allP 〈 0.01 ). Conclusions HCMV congential latent infection could induce cell apoptosis in cerebral cortex of elderly mouse.
出处
《中华老年医学杂志》
CAS
CSCD
北大核心
2007年第3期209-211,共3页
Chinese Journal of Geriatrics
基金
教育部科学技术研究重点项目(01052)
安徽省“十五”生物医药重大科技专项(01303003)
安徽省教育厅自然科学基金项目(2006KJ320B)