Alhaja E, Adan J, Pagan R, Mitjans F, Cascalló M, Rodríguez M, Noé V, Ciudad CJ, Mazo A, Vilaró S, Piulats J. Anti-migratory and anti-angiogenic effect of p16: a novel localization at membrane ruffles and lamellipodia in endothelial cells.
Angiogenesis 2005;
7:323-33. [PMID:
15886876 DOI:
10.1007/s10456-005-0368-9]
[Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2004] [Accepted: 12/16/2004] [Indexed: 12/12/2022]
Abstract
Recent evidence has established different functions for the tumor suppressor protein, p16(INK4A) aside from controlling the cell cycle. Here we report that cdk4/6 inhibition blocked both human umbilical vein endothelial cells (HUVEC) spreading on a vitronectin matrix and HUVEC migration on vitronectin. p16 can also act as an anti-angiogenic molecule in vitro since HUVEC and HMEC cells transfected with Ad-p16 or treated with Antennapedia p16 peptides are unable to differentiate on a Matrigel matrix. Both, p16, cyclin D1, cdk4 and cdk6 were immuno-colocalized with Ezrin, Rac, Vinculin, alphav-integrin, and FAK proteins in the ruffles and lamellipodia of migratory cells. Our results indicate that p16 is a key component of a new cytoplasmic pathway controlling angiogenesis of endothelial cells via the alphavbeta3-integrin-mediated migration.
Collapse