Figure 6.
Galgp, but not other mucins, enables CD43−/− Mφ to bind M. avium. M. avium at a bacteria/cell ratio of 2:1 were incubated with CD43−/− Mφ in the absence (none) or presence of Galgp, AFGP, or PSM reduced and trypsin-treated (PSM-RT) at 100 μg/ml. After 4 h, the cells were washed and the mycobacteria associated with cells were quantified. Shown are mean values ± SEM for cells from three mice. The number of M. avium associated with the CD43−/− Mφ incubated with the mycobacteria in the presence of Galgp, AFGP, or PSM were significantly different (P < 0.0001). Similar effects of mucin treatments were seen in one additional experiment.