1887

Abstract

The aim of this study was to investigate the interaction of with three different human cell lines: TCC-SUP (epithelial cells from urinary bladder), HeLa (epithelial cells from cervical carcinoma) and Caco-2 (epithelial cells from colorectal adenocarcinoma). In particular we sought to assess the degree of cell damage and activity reduction induced by adhesion and the role of secreted aspartyl proteinase () gene expression in this process. Two strains were used: the reference strain ATCC 750 and a clinical isolate from urine (U69). The ability of to adhere to a confluent layer of human cells was determined using an adaptation of the crystal violet staining method; cell damage and cell activity inhibition induced by the adhesion of were assessed by measuring lactate dehydrogenase and tetrazolium salt (MTS) reduction, respectively. gene expression was determined by real-time PCR. Both strains were able to adhere to the different human cells, although in a strain- and cell-line-dependent manner. Concerning the cellular response to , the highest inhibition of cell activity was obtained for Caco-2, followed by TCC-SUP and HeLa cells. The highest percentage of cell damage (around 14 %) was observed for TCC-SUP cells in contact with the U69 isolate and for Caco-2 in contact with the reference strain. Real-time PCR analysis revealed a wide range of expression profiles of genes for both strains in contact with the different types of epithelial cells. was the gene expressed at the highest level for both strains in contact with the three human epithelial cell lines. The results highlight that the response of human cells to adhesion, as well as production of SAPs, is dependent on both the strain and the epithelial cell line.

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2011-09-01
2020-01-18
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