抗氯喹伯氏疟原虫ANKA株过度表达的54 kDa蛋白免疫电镜定位

IMMUNOELECTRON-MICROSCOPIC LOCALIZATION OF A 54-kDa PROTEIN OVEREXPRESSED BY CHLOROQUINE-RESISTANT PLASMODIUM BERGHEI ANKA STRAIN

抗氯喹伯氏疟原虫ANKA株过度表达的54kDa蛋白是我们首次发现的一种蛋白,本文应用免疫电镜技术对其在伯氏疟原虫ANKA株体内的定位进行了研究。结果表明54kDa蛋白主要散在分布于疟原虫滋养体及裂殖体胞质中;疟原虫寄生的红细胞中也有少量分布;抗氯喹伯氏疟原虫体内54kDa蛋白的含量远高于氯喹敏感伯氏疟原虫。本文结果有助于理解疟原虫的抗氯喹机制。

A 54-kDa protein overexpressed by chloroquine-resistant Plasmodium berghei ANKA strain was first reported by us. In this paper, the localization of this protein by immunoelec-tron microscopy is presented. The results showed that the protein was mainly scattered inside the cytoplasm of the early date trophozoites and schizonts of erythrocytic stage of P. berghei ANKA strain , and some of it was also found in cytoplasm of erythrocytes infected with parasites. The protein content was much higher in chloroquine-resistant P. berghei ANKA strain than in chloroquine-sensitive P. berghei ANKA strain, suggesting the importance of this protein in understanding mechanism of chloroquine resistance in malaria parasites .