LTP induced by activation of voltage-dependent Ca2+ channels requires protein kinase activity.

Abstract

We have examined the requirement for protein kinase activity in long-term potentiation (LTP) induced by activation of voltage-dependent Ca2+ channels (VDCCs) in hippocampal slices. We previously demonstrated that LTP induced by application of the K+ channel blocker tetraethylammonium (TEA-LTP) consisted of two distinct components, an NMDA receptor-dependent component and a VDCC-dependent component. The results herein demonstrate that both the NMDA and VDCC-dependent components of TEA-LTP are blocked by K-252a, a broad spectrum protein kinase inhibitor. Furthermore, VDCC-dependent TEA-LTP is attenuated by KN-62, a specific inhibitor of Ca2+/calmodulin dependent protein kinase II (CaM-KII). These results demonstrate that LTP induced by VDCC activation requires protein kinase activity and suggest that different routes of postsynaptic Ca2+ influx activate protein kinases to trigger the induction of LTP but that these enzyme systems may be contained in different cell compartments.

Cite this paper

@article{Huber1995LTPIB, title={LTP induced by activation of voltage-dependent Ca2+ channels requires protein kinase activity.}, author={Kimberly M Huber and Michael D. Mauk and Paul T. Kelly}, journal={Neuroreport}, year={1995}, volume={6 9}, pages={1281-4} }