猴免疫缺陷病毒感染的猴自身抗体和自身免疫

Autoantibodies and Autoimmunity in Simian Immunodeficiency Virus-infected Monkeys

目的研究猴免疫缺陷病毒(SIV)感染的猴艾滋病模型自身抗体和病理形态学的动态变化,探讨艾滋病与自身免疫的关系。方法采用间接免疫荧光法,以小鼠心、肝、脾、肺、肾和淋巴结为靶抗原测定SIV感染猴各时间点的自身抗体;采用ECV304内皮细胞株和粒细胞抗原片分别测定抗内皮细胞和粒细胞的自身抗体。并对比检查相应的淋巴结、肾、脑等脏器的病理组织学改变。结果SIV感染后多种自身抗体比感染前升高,如抗淋巴细胞抗体、抗血管内皮细胞抗体和抗粒细胞抗体等。病理组织学检查结果显示,在淋巴结有不同程度的组织损伤;在淋巴结、大脑皮层、消化道黏膜下层、心脏间质、肾和肝窦等脏器内有比较明显的小血管病变及其诱发的病理改变。结论猴自身抗体水平的升高及相应组织、器官的损伤是猴艾滋病自身免疫的佐证。

Objective To study the relationship between simian acquired immunodeficiency syndrome （SAIDS） and autoimmunity in simian immunodeficiency virus （SIV） -infected monkeys. Methods Indirect immunofluorescence assays were performed to detect plasma or serum autoantibodies in SIV-infected monkeys. The heart, liver, spleen, lung, kidney, and lymph node of BALB/c mice, a strain of endothelial cell ECV304, and granulocytes were used as target antigens. These results were compared with HE stained slides of SIV-infected monkeys. Results The levels of various autoantibodies, including anti-lymphocyte autoantibodies, anti-endothelial cell autoantibodies, and anti-granulocyte antibodies, increased after SIV infection in monkeys. Moreover, pathological examinations showed injuries in the lymphoid tissue and vascular pathological changes in cerebral cortex, submucosa of gastrointestinal tract, interstitial capillaries of myocardium, nephron of the kidney, and sinusoid cell of liver. Conclusion The increased autoantibodies and the pathological changes of tissues and organs confirm the existence of autoimmunity in SIV-infected monkeys.