Hissa Barbara, Andrade Luciana de Oliveira
Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, BH, 31270-901, Brazil.
Parasitol Int. 2015 Apr;64(2):135-8. doi: 10.1016/j.parint.2014.11.005. Epub 2014 Nov 15.
Trypanosoma cruzi is an intracellular parasite that depends on host cell lysosome recruitment and fusion for cell infection. Recently, we have shown that host cells present two differentially regulated lysosome pools. Treatment with methyl-beta cyclodextrin, a drug able to sequester cholesterol from plasma membrane, triggers the exocytosis of peripheral lysosomes, while treatment with Latrunculin-A, an actin depolymerizing drug, recruits a more internal pool. In this work we aimed to study which pool is used by the T. cruzi during invasion. We have shown that invasion is impaired when cells are previously treated with methyl-beta cyclodextrin, but not with Latrunculin-A, indicating that T. cruzi uses the cortical pool for invasion.
克氏锥虫是一种细胞内寄生虫,其细胞感染依赖于宿主细胞溶酶体的募集和融合。最近,我们发现宿主细胞存在两个调控方式不同的溶酶体库。用甲基-β-环糊精(一种能够从质膜中螯合胆固醇的药物)处理会触发外周溶酶体的胞吐作用,而用肌动蛋白解聚药物Latrunculin-A处理则会募集一个更靠内部的溶酶体库。在这项研究中,我们旨在探究克氏锥虫在入侵过程中使用的是哪个溶酶体库。我们发现,细胞预先用甲基-β-环糊精处理后入侵会受到损害,但用Latrunculin-A处理则不会,这表明克氏锥虫利用皮质溶酶体库进行入侵。