Achment on HEC-1A Considering that both HHA and GNA were non-toxic in the epithelial cell system, we further investigated the inhibition of HIV adsorption on the apical side of HEC-1A by the compounds. Cells were thus incubated with HIV-1Ba-L in the presence or absence of different concentrations of HHA or GNA. As depicted in Figure 2A, HHA faintly decreased the attachment of HIV-1Ba-L on epitheli