中国恒河猴SIVmac239艾滋病模型亚急性期的实验观察

目的:观察SIVmac239中国恒河猴艾滋病模型亚急性期内T淋巴细胞亚群、病毒载量指标变化情况,探讨中国恒河猴艾滋病模型亚急性期病毒学相关指标变化特征.方法:采用SlVmac239病毒株静脉接种健康中国恒河猴复制中国恒河猴艾滋病动物模型,观察猴免疫缺陷病毒(simian immunodeficiency virus,SIV)感染后动物模型亚急性期内T淋巴细胞亚群指标变化、病毒载量变化情况.同时记录动物模型临床症状情况.结果:健康恒河猴接种病毒株后3个月体重及BMI指数比较稳定,各时间点差异不显著,在感染第10 ～14天病毒载量达到高峰(6.72±0.44)个1g,此后整体表现为水平波动下降趋势.T淋巴细胞亚群在感染后出现显著改变,CD3,CD4,CD8计数和百分比有不同程度的变化;CD4/CD8比值感染后2周内明显下降,一般在病毒载量高峰时表现为最低比值为(0.86±0.29),随后比值缓慢波动上升.感染3个月内共有3只感染猴临床症状明显,其中1只出现腹泻、2只出现摄食下降等临床症状.结论:中国恒河猴艾滋病动物模型与国外印度恒河猴艾滋病动物模型亚急性期相似,研究内容为中国恒河猴应用于艾滋病模型研究的标准化建立补充了更详尽的亚急性期变化内容.

Experimental observation of SIVmac239 Chinese rhesus monkey model at sub-acute phase of AIDS

Objective: To observe T lymphocyte subsets and indicators of changes in viral load in sub-acute period in Chinese rhesus monkey model of AIDS SIVmac239.To explore Virology related index variation in sub-acute period of the Chinese rhesus monkey model of AIDS. Method: To replicate Chinese rhesus monkey model of AIDS, healthy Chinese rhesus monkey was inoculated with SIVmac239 viral strain.To observe changes in T lymphocyte subsets indexes and viral load after infection with the simian immunodeficiency virus (SIV) in sub-acute period on an animal model. The clinical symptoms of the animal model was recorded simultaneously. Result: During the 10 weeks after SIV acute infection, body weight and BMI index were relatively stable, the difference was not significant at all time points. Twelve monkeys were tested SIV positive by real-time PCR after three days of infection. On the 7th day after infection, 15 monkeys were tested SIV positive. Viral load increased rapidly, but reached a peak on the 10th -14th day after infection, then showed a level of volatility decline. T lymphocyte subsets showed significant changes, among them, CD3% and CD3 counts fluctuated upward trend and reached to the highest level in two weeks after infection; of CD4% and CD4 count changes were not synchronized, CD4% declined trend while the CD4 count was an increasing trend after the infection; of CD8% and CD8 counts fluctuate upward trend, and reached to a highest level in two weeks after infection;the ratio of CD4/CD8 and the counts of CD4CD28 T cells decreased significantly in two weeks after infection; the former followed by a slow decline, the latter followed by a rapid rise.Three mouths after the infection 3 monkeys showed significant clinical symptoms. One of the rhesus monkeys had symptoms of diarrhea and two of them had reduced food intake. Conclusion: This experiments established standardization of Chinese Rhesus monkeys used in the research of AIDS and provide a detailed contents in the changes of sub-acute phase.