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Neurosci Lett. 2012 May 31;517(2):92-7. doi: 10.1016/j.neulet.2012.04.031. Epub 2012 Apr 20.

Co-localization of hippocampal cholinergic neurostimulating peptide precursor with collapsin response mediator protein-2 at presynaptic terminals in hippocampus.

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  • 1Department of Neurology, Nagoya City University, 1 Kawasumi, Nagoya 467-8601, Japan.

Abstract

Hippocampal cholinergic neurostimulating peptide (HCNP) induces the synthesis of acetylcholine in medial septal nucleus in vitro and in vivo. HCNP precursor protein (HCNP-pp) is a multifunctional protein that participates in a number of signaling pathways, including MAPK/extracellular signal and G-protein-coupled receptor kinase 2. We recently demonstrated that the amount of collapsin response mediator protein-2 (CRMP-2) is increased in hippocampus of HCNP-pp transgenic mice. To clarify the interaction between HCNP/HCNP-pp and CRMP-2 and its role in synaptic function, we investigated whether HCNP-pp is localized to the synapse and if it affects protein expression. Here, we demonstrate that HCNP-pp co-localizes with CRMP-2 at presynaptic terminals. Furthermore, HCNP-pp overexpression increases synaptophysin levels. These findings suggest that HCNP-pp, in association with CRMP-2, plays an important role in presynaptic function in the hippocampus.

Copyright © 2012 Elsevier Ireland Ltd. All rights reserved.

PMID:
22542739
[PubMed - indexed for MEDLINE]
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