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Cell adhesion, vitronectin binding properties of chancroid pathogen studied.
2003 JAN 9 - (NewsRx.com & NewsRx.net) -- University of North Carolina researchers have studied characteristics of the pathogen that causes the sexually transmitted genital ulcer disease chancroid, Haemophilus ducreyi.
"H. ducreyi serum resistance protein A (DsrA) is a member of a family of multifunctional outer membrane proteins that are involved in resistance to killing by human serum complement. The members of this family include YadA of Yersinia species, the UspA proteins of Moraxella catarrhalis, and the Eib proteins of Escherichia coli. The role of YadA, UspA1, and UspA2H as eukaryotic cell adhesins and the function of UspA2 as a vitronectin binder led to our investigation of the cell adhesion and vitronectin binding properties of DsrA," L.E. Cole and colleagues explained.
They reported finding "that DsrA was a keratinocyte-specific adhesin as it was necessary and sufficient for attachment to HaCaT cells, a keratinocyte cell line, but was not required for attachment to HS27 cells, a fibroblast cell line. We also found that DsrA was specifically responsible for the ability of H. ducreyi to bind vitronectin."
The researchers hypothesized "that DsrA might use vitronectin as a bridge to bind to human cells" but their study data didn't support this. "[Eliminating] HaCaT cell binding of ...
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Source: HighBeam Research, Cell adhesion, vitronectin binding properties of chancroid pathogen...