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Sigma-1 Receptor and Neuronal Excitability.
1Department of Psychiatry, University of Texas Southwestern Medical Center, 2201 Inwood Road, Dallas, TX, 75390-9070, USA. Said.Kourrich@UTSouthwestern.edu.
Handbook of Experimental Pharmacology
|March 10, 2017
Summary
The sigma-1 receptor (Sig-1R) regulates neuronal excitability by interacting with ion channels. Understanding these interactions is key to explaining Sig-1R
Area of Science:
- Neuroscience
- Molecular Biology
- Pharmacology
Background:
- The sigma-1 receptor (Sig-1R) is a unique intracellular chaperone protein.
- Sig-1R interacts with various ion channels, influencing neuronal functions.
- Dysregulation of Sig-1R is implicated in neurological and psychiatric disorders.
Purpose of the Study:
- To review and discuss the latest findings on Sig-1R modulation of ion channels.
- To explore how Sig-1R target selection impacts neuronal excitability.
- To propose hypotheses for diverse Sig-1R-mediated excitability outcomes.
Main Methods:
- Literature review of studies on Sig-1R and ion channel interactions.
- Analysis of experimental data on Sig-1R's effects on voltage-gated and ligand-gated ion channels.
- Theoretical modeling to explain complex Sig-1R-ion channel interplay.
Main Results:
- Sig-1R modulates both voltage-gated ion channels (VGICs) and ligand-gated ion channels (LGICs).
- Specific interactions lead to varied effects on neuronal excitability.
- The combination of modulated channels determines the net outcome.
Conclusions:
- Sig-1R's interaction with VGICs and LGICs is crucial for fine-tuning neuronal excitability.
- Further research is needed to elucidate target selection mechanisms.
- Understanding these mechanisms may reveal novel therapeutic strategies for Sig-1R-associated diseases.
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