Semaphorin-5A

Definition:

Bifunctional axonal guidance cue regulated by sulfated proteoglycans; attractive effects result from interactions with heparan sulfate proteoglycans (HSPGs), while the inhibitory effects depend on interactions with chondroitin sulfate proteoglycans (CSPGs) (By similarity). Ligand for receptor PLXNB3. In glioma cells, SEMA5A stimulation of PLXNB3 results in the disassembly of F-actin stress fibers, disruption of focal adhesions and cellular collapse as well as inhibition of cell migration and invasion through ARHGDIA-mediated inactivation of RAC1. May promote angiogenesis by increasing endothelial cell proliferation and migration and inhibiting apoptosis.

References:

[1]. Stefania Artigiani, et al. Plexin-B3 is a functional receptor for semaphorin 5A. EMBO Rep. 2004 Jul;5(7):710-4. [Content Brief]

[2]. X Li, et al. Semaphorin 5A and plexin-B3 regulate human glioma cell motility and morphology through Rac1 and the actin cytoskeleton. Oncogene. 2012 Feb 2;31(5):595-610. [Content Brief]

[3]. Anguraj Sadanandam, et al. Semaphorin 5A promotes angiogenesis by increasing endothelial cell proliferation, migration, and decreasing apoptosis. Microvasc Res. 2010 Jan;79(1):1-9. [Content Brief]

[4]. Xinhua Li, et al. Semaphorin 5A and plexin-B3 inhibit human glioma cell motility through RhoGDIalpha-mediated inactivation of Rac1 GTPase. J Biol Chem. 2010 Oct 15;285(42):32436-45. [Content Brief]

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