The present invention provides an in vitro method for identifying a compound that promotes endothelial cell adhesion, endothelial cell spreading, endothelial cell migration and/or endothelial cell proliferation for the manufacture of a diagnostic or therapeutic agent. The present invention further provides the identified compounds and pharmaceutical compositions, and assays and kits for identifying a compound or using a compound that promotes endothelial cell adhesion, endothelial cell spreading, endothelial cell migration and/or endothelial cell proliferation and is useful for bioprinting.