Neuron
Volume 1, Issue 1, March 1988, Pages 33-43
Journal home page for Neuron

N-cadherin and integrins: Two receptor systems that mediate neuronal process outgrowth on astrocyte surfaces

https://doi.org/10.1016/0896-6273(88)90207-3Get rights and content

Abstract

Receptor-mediated interactions between neurons and astroglia are likely to play a crucial role in the growth and guidance of CNS axons. Using antibodies to neuronal cell surface proteins, we identified two receptor systems mediating neurite outgrowth on cultured astrocytes. N-cadherin, a Ca2+-dependent cell adhesion molecule, functions prominently in the outgrowth of neurites on astrocytes by E8 and E14 chick ciliary ganglion (CG) neurons. β1-class integrin ECM receptor heterodimers function less prominently in E8 and not at all in E14 neurite outgrowth on astrocytes. The lack of effect of integrin β1 antibodies on E14 neurite out-growth reflects an apparent loss of integrin function, as assayed by E14 neuronal attachment and process out-growth on laminin. N-CAM appeared not to be required for neurite outgrowth by either E8 or E14 neurons. Since N-cadherin and integrin β1 antibodies together virtually eliminated E8 CG neurite outgrowth on cultured astrocytes, these two neuronal receptors are probably important in regulating axon growth on astroglia in vivo.

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