Figure 2

ISM induces EC apoptosis through αvβ5 integrin. (a) Knockdown of β5, but not β3 integrin, suppressed ISM-induced apoptosis. (b) Knockdown of β5 integrin rescued ISM-suppressed proliferation. (c) More free αvβ5 integrins are available in ECs growing on FN-coated surface. VN, vitronectin; ISM, isthmin; FN, fibronectin. (d) ISM induces more extensive apoptosis in ECs grown on FN-coated surface