腹腔单核细胞对约氏疟原虫感染红细胞的免疫作用

目的检测腹腔单核细胞对约氏疟原虫感染红细胞(靶细胞)的免疫作用.方法用皂化约氏疟原虫感染的鬼形红细胞(SPRBC)腹腔注射免疫小鼠2次.3周后,用感染红细胞(PRBC)作为靶细胞注入腹腔,90 min后洗取腹腔细胞,用扫描电镜观察腹腔单核细胞的变化和对靶细胞的作用效应.结果腹腔细胞在靶细胞注入90 min后呈现各种激活状态:(1)腹腔单核细胞大小不均一,细胞表面绒毛变的细长浓密且有细胞间联接;(2)部分腹腔单核细胞胞浆摊展(呈"煎蛋"样)或呈"细胞炸弹"样;(3)延展或片状的绒毛和摊展的胞浆可粘附包卷靶细胞,并可使其因密集穿孔而受损.结论小鼠经约氏疟原虫感染的鬼形红细胞免疫后,其腹腔单核细胞对红内期疟原虫具有免疫保护作用.

Immunity of peritoneal monocytes against Plasmodium yoelii infected erythrocytes

Objective To test the immunity of peritoneal monocytes against Plasmodium yoelii infected red blood cells (target cells). Methods Saponinized Plasmodium yoelii infected red blood cells (SPRBC, Ghost erythrocyte) were used to immunize mice i.p twice. Three weeks later, the infected red blood cells were injected i.p.; 90 min later, the total peritoneal cells were isolated and washed for scanning electromicroscopy to observe the effects of the peritoneal monocyte to the target cell. Results The peritoneal cells of the immunized mice were activated after 90 min of the challenge of target cells. The size of the cell was not even and the pili on the cell surface turned to be long and densed. Cell interconnections were found among the cells. In some peritoneal monocytes, their cell plasma were scattered (omlette-like) or with the shape as "cellular bomb". The scattered or the sheeted pili and spredding cell plasma could adhere to the target cells which were perforated densely and damaged. Conclusion The protective adaptive immunity exists in the peritoneal monocytes of immunized mice.