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Regulator of G-protein signaling 14 protein modulates Ca²+ influx through Cav1 channels

Elisa Martín-Montañez1, Maria José Acevedo, Juan Félix López-Téllez

  • 1Laboratory of Neurobiology at CIMES, University of Malaga, Malaga, Spain.

Neuroreport
|September 16, 2010
PubMed

Insights

Regulator of G-protein signaling 14 (RGS-14) protein reduces calcium influx via L-type voltage-activated calcium (Cav1) channels. This finding suggests RGS-14 may enhance cognitive functions by modulating Cav1 channel activity.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cell Physiology

Background:

  • Calcium influx through L-type voltage-activated calcium (Cav1) channels is vital for brain functions like memory and behavior.
  • Disruptions in calcium (Ca²⁺) homeostasis are associated with cognitive disorders, highlighting the need to understand Cav1 channel regulation.

Purpose of the Study:

  • To investigate the impact of the multifunctional protein regulator of G-protein signaling 14 (RGS-14) on Cav1 channel activity.
  • To determine if RGS-14 influences intracellular calcium transients in neuronal cell lines.

Main Methods:

  • Utilized neuronal cell lines NG108-15 and SH-SY5Y for experiments.
  • Assessed the effect of RGS-14 protein on Ca²⁺ influx.
  • Examined the dependence of RGS-14's effect on nifedipine-sensitive Cav1 channels.

Main Results:

  • RGS-14 protein significantly decreased Ca²⁺ influx in both NG108-15 and SH-SY5Y cell lines.
  • The observed reduction in Ca²⁺ influx by RGS-14 was dependent on nifedipine-sensitive Cav1 channels.

Conclusions:

  • RGS-14 modulates the activity of nifedipine-sensitive Cav1 channels.
  • RGS-14 may play a role in facilitating cognitive processing through the regulation of Cav1 channel-mediated intracellular Ca²⁺ signaling.

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