Abstract
The adherence ofCandida yeasts to monolayers of human intestinal epithelium was studied in order to determine the specific and nonspecific mechanisms that might contribute to yeast adherence. Multiple factors were shown to significantly affect the adherence of yeasts to intestinal cells. It was demonstrated that hydrophobic yeasts adhered two times greater than normal yeasts, and positively charged yeasts adhered ten times greater than normal yeasts to monolayers of intestinal epithelium. The binding of yeasts to the intestinal cells was saturable and was most effectively blocked by mucin, which caused an 83% reduction in adherence, whereas the addition ofd-glucose caused a 41% reduction in adherence. Aggregation or coadherence of yeasts occurred as the yeast inocula were increased.Candida appears to possess the ability to adhere to living tissue by several mechanisms, such as adhesin-receptor interactions, nonspecific hydrophobic and ionic bonding, and aggregation or coadherence. This is the first demonstration of multiple forces that may act simultaneously in the process of adherence of yeasts to living cells.
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