Send to

Choose Destination
See comment in PubMed Commons below
Microbiol Immunol. 2003;47(1):105-7.

High molecular weight factor in FCS inhibits Helicobacter pylori VacA-binding to its receptor, RPTPbeta, on AZ-521.

Author information

Department of Bacteriology, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Nagasaki 852-8523, Japan.


VacA, a secretory product of Helicobacter pylori, binds to its cell surface receptor, receptor tyrosine phosphatase (RPTP) beta, leading to cytoplasmic vacuolization of gastric epithelial AZ-521 cells. VacA binding to the cell surface and VacA-dependent vacuolization were inhibited by cell culture media containing fetal calf serum (FCS). The high molecular weight fraction of FCS isolated by Superose 12 gel filtration chromatography inhibited VacA binding, whereas only weak effects were observed with other fractions. These data show that the high molecular weight fraction of FCS inhibits VacA action though its ability to block toxin binding to its receptor, RPTPbeta, on AZ-521 cells.

[Indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Wiley
    Loading ...
    Support Center