Rotaviruses attach to a site on αvβ3
different from the integrin RGD-recognition domain. MA104 cells were
incubated with MEM or peptides GRGDSP (RGD) or GRGESP (RGE) (400
μg/ml) for 60 min at 37°C. The cells were washed and vitronectin
(Vn, 1.5 μg/ml) was subsequently added to control (MEM) or
peptide-incubated cells for 60 min at 37°C. The cells were then
washed and infected with rotaviruses as described in the legend for
Fig. 1. Data are expressed as percentage of the virus infectivity
obtained when the cells were preincubated with MEM as control. The
average numbers of foci representing 100% infectivity were 109, 161,
and 114 for RRV, nar3, and Wa, respectively. The bars represent the
standard error of at least two independent experiments performed in
duplicate.