Candida albicans is considered the main pathogenic yeast responsible for a multitude of infective disorders. However, other yeasts, such as Candida famata, are being recognized as potential emerging pathogens that cause several types of infections in humans and animals. Consequently, we have investigated the adhesion and internalization of Candida famata into monocytes and epithelial cells. The interaction of the yeast with the cells is very rapid and takes place during the first 15 min of injection. However, the affinity of the yeast for the cells varies, THP-1 (human monocytes) being the highest and followed in decreasing order by HeLa (human carcinoma), HaCaT, and Pam-212 (human and mouse keratinocytes, respectively). Heat inactivation or treatment with nystatin, significantly decreases yeast adhesion to cells. Immunofluorescence, as well as scanning and transmission electron microscopy, reveals that cell lines are able to internalize C. famata. At 48 h after infection, most of the yeasts located inside cells appear degraded, but some yeasts recovered from lysed cells, were still viable. Adhesion and internalization of C. famata into HeLa cells were found to be lower than those of C. albicans and C. glabrata, but higher than those of S. cerevisiae. In addition, infection with C. famata results in actin microfilaments rearrangement. This article presents novel data in the interaction of this pathogenic yeast with mammalian cells.

译文

:白色念珠菌被认为是导致多种感染性疾病的主要致病酵母。但是,其他酵母,例如念珠菌,也被认为是潜在的新兴病原体,可引起人类和动物的几种感染。因此,我们调查了念珠菌进入单核细胞和上皮细胞的黏附和内在化。酵母与细胞的相互作用非常迅速,并在注射的前15分钟内发生。但是,酵母对细胞的亲和力各不相同,THP-1(人类单核细胞)最高,依次为HeLa(人类癌),HaCaT和Pam-212(分别为人类和小鼠角质形成细胞)。热灭活或用制霉菌素处理,会显着降低酵母菌对细胞的粘附力。免疫荧光以及扫描和透射电子显微镜显示,细胞系能够内化法氏梭菌。感染后48小时,位于细胞内的大多数酵母菌似乎已降解,但从裂解细胞中回收的一些酵母菌仍能存活。发现C. famata在HeLa细胞中的黏附和内在化低于白色念珠菌和光滑念珠菌,但高于酿酒酵母。另外,用法氏梭状芽胞杆菌感染导致肌动蛋白微丝重排。本文介绍了这种病原酵母与哺乳动物细胞相互作用的新数据。

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