Inactivation kinetics of voltage-gated calcium channels in glutamatergic neurons are influenced by SNAP-25
Articolo
Data di Pubblicazione:
2011
Citazione:
Inactivation kinetics of voltage-gated calcium channels in glutamatergic neurons are influenced by SNAP-25 / S.B. Condliffe, M. Matteoli. - In: CHANNELS. - ISSN 1933-6950. - 5:4(2011), pp. 304-307. [10.4161/chan.5.4.16228]
Abstract:
SNAP-25 forms part of the SNARE core complex that mediates membrane fusion. Biochemical and electrophysiological evidence supports an accessory role for SNAP-25 in interacting with voltage-gated calcium channels (VGCCs) to modulate channel activity. We recently reported that endogenous SNAP-25 negatively regulates VGCC activity in glutamatergic neurons from rat hippocampal cultures by shifting the voltage-dependence of inactivation of the predominant P/Q-type channel current in these cells. In the present study, we extend these findings by investigating the effect that manipulating endogenous SNAP-25 expression has on the inactivation kinetics of VGCC current in both glutamatergic and GABAergic cells recorded from 9-13 DIV cultures. Silencing SNAP-25 in glutamatergic neurons significantly slowed the inactivation rate of P/Q-type VGCC current whereas alterations in SNAP-25 expression did not alter inactivation rates in GABAergic neurons. These results indicate that endogenous SNAP-25 plays an important role in P/Q-type channel regulation in glutamatergic neurons.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
voltage-gated calcium channels; SNAP-25; inactivation; kinetics; hippocampal neurons; glutamatergic; GABAergic
Elenco autori:
S.B. Condliffe, M. Matteoli
Link alla scheda completa:
Link al Full Text: