Results of in vitro angiogenesis inhibition of levamisole and its derivatives in comparison with suramin (5), vehicle (DMSO), and medium alone, as observed by HUVEC number and morphology.

a<p>Percent of the area covered by HUVEC as observed by CD31 staining.</p>b<p><i>Clusters</i> refer to morphologies where several cells that form round or elongated clusters; <i>Cords</i> refer to morphologies where single to a few cells form cord-like structures without forming a network.</p>c<p>(++++) = clusters with area <4%; (+++) = cords with area <4%; (++) = clusters with area >4%; (+) = intermediate morphologies and varying area percentages.