EphB receptors co-distribute with a nicotinic receptor subtype and regulate nicotinic downstream signaling in neurons.

Molecular and Cellular Neurosciences
Zhaoping LiuDarwin K Berg

Abstract

Activation of nicotinic acetylcholine receptors (nAChRs) on neurons engages calcium-dependent signaling pathways regulating numerous events. Receptors containing alpha7 subunits (alpha7-nAChRs) are prominent in this because of their abundance and high relative calcium permeability. We show here that EphB2 receptors are co-localized with postsynaptic alpha7-nAChRs on chick ciliary ganglion neurons and that treatment of the cells with an ephrinB1 construct to activate the EphB receptors exerts physical restraints on both classes of receptors, diminishing their dispersal after spine retraction or lipid raft disruption. Moreover, the ephrinB1/EphB receptor complex specifically enhances the ability of alpha7-nAChRs to activate the transcription factor CREB, acting through a pathway including a receptor tyrosine kinase, a Src family member, PI3 kinase, and protein kinase A most distally. The enhancement does not appear to result from a change in the alpha7-nAChR current amplitude, suggesting a downstream target. The results demonstrate a role for ephrin/EphB action in nicotinic signaling.

Citations

May 13, 2009·Acta Pharmacologica Sinica·Robert A NeffDarwin K Berg
Jul 2, 2010·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Catarina C FernandesDavid Gómez-Varela
Nov 17, 2009·FEBS Letters·Francisco J BarrantesSofía Vallés
Apr 21, 2012·Trends in Neurosciences·Sean I Sheffler-Collins, Matthew B Dalva
Jul 1, 2008·Molecular and Cellular Neurosciences·Gallen B Triana-BaltzerDarwin K Berg
Mar 17, 2016·Cellular and Molecular Life Sciences : CMLS·Hans O Kalkman, Dominik Feuerbach
Jun 1, 2014·Neuroscience and Biobehavioral Reviews·Susanna Molas, Mara Dierssen
Mar 23, 2017·Frontiers in Cellular Neuroscience·JianGang WangChengBiao Lu
Jun 18, 2017·Frontiers in Immunology·Fabiana Maria das Graças Corsi-ZuelliCamila Marcelino Loureiro

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