Relationship of capture of circulating P.yoelii sprozoites by liver,spleen and lungs with the activity of macrophages in rats / 第三军医大学学报

ABSTRACT

Two hours after the rats were infected with 125I - labeled sporozoites of Plasmo-dium yoelii,the sporzoites captured by the liver,the spleen and the lungs accounted for 1.67%,0.046% and 0.49% respectively.During the 2nd to the 18h,the sporozoites decreased in number slowly in the liver,remained unchanged in the spleen and decreased in number quickly in the lungs as time went on.When the liver and the lungs were perfused with quick M199 stream containing sporozoites,the capture rate of sporozoites was not affected in the liver but that of the lungs was markedly decreased.The numbr of sporozoites in the liver and the spleen was larger in those rats with their phagocytosis activated than in those with the phagocytosis inhibited.while in the lungs,the number of sporozoites was not influenced by the activity of macrophages.These findings suggest that the mechanism of capturing sporozoites in the lung is mainly mechanical and the alveolar macrophages play little role in that,but that in the liver and the spleen is mainly a biological process in which macrophages play an important role.