['To detect the role of activated protein C(APC) on proliferation of endothelial cell and investigate the expression of endothelial protein C receptor( EPCR) in variety of tumor cell lines.', 'The effect of APC on endotheliocyte proliferation was determined by MTT colorimetry. IL-6 and IL-8 in supernatant were measured by ELISA. Expression of EPCR were measured by semi-quantitative RT-PCR.', 'APC can increase the proliferation of EC significantly. EPCR gene was found in 91.7% of solid tumors and 66.7% of hematopoietic malignancies.'] Does [ Expression of endothelial protein C receptor in tumor cell lines and It 's significance ]?