Besides adhesion: new perspectives of integrin functions in angiogenesis.
During angiogenic remodelling in embryo and adult life, endothelial cells lining blood vessel walls dynamically modify their integrin-mediated adhesive contacts with the surrounding extracellular matrix. However, besides regulating cell adhesion and migration, integrins dynamically participate in a network with soluble molecules and their receptors. Angiogenesis is characterized by opposing autocrine and paracrine loops of growth factors and semaphorins that regulate the activation of integrins on the endothelial surface through tyrosine kinase receptors (TKR) and the neuropilin/plexin system. Moreover, pro- and anti-angiogenic factors can directly bind integrins and regulate endothelial cell behaviour. This review summarizes the recent progress in understanding the reciprocal interactions between integrins, TKR, and semaphorin receptors.
Serini
Guido
G
Department of Oncological Sciences, Institute for Cancer Research and Treatment, University of Torino, Sp 142, Km 3.95, 10060 Candiolo, Torino, Italy.
Napione
Lucia
L
Arese
Marco
M
Bussolino
Federico
F
D042501:Angiogenic Proteins / Q000378:metabolism; D000818:Animals; D002448:Cell Adhesion; D002465:Cell Movement; D042783:Endothelial Cells / Q000201:enzymology / Q000378:metabolism*; D006801:Humans; D016023:Integrins / Q000378:metabolism*; D018919:Neovascularization, Physiologic; D020794:Receptor Protein-Tyrosine Kinases / Q000378:metabolism; D039961:Semaphorins / Q000378:metabolism; D015398:Signal Transduction
D042501:Angiogenic Proteins; D016023:Integrins; D039961:Semaphorins; D020794:Receptor Protein-Tyrosine Kinases