Molecular and circuit determinants in the globus pallidus mediating control of cocaine-induced behavioral plasticity.
Neuron
; 112(20): 3470-3485.e12, 2024 Oct 23.
Article
in En
| MEDLINE
| ID: mdl-39153478
ABSTRACT
The globus pallidus externus (GPe) is a central component of the basal ganglia circuit that acts as a gatekeeper of cocaine-induced behavioral plasticity. However, the molecular and circuit mechanisms underlying this function are unknown. Here, we show that GPe parvalbumin-positive (GPePV) cells mediate cocaine responses by selectively modulating ventral tegmental area dopamine (VTADA) cells projecting to the dorsomedial striatum (DMS). Interestingly, GPePV cell activity in cocaine-naive mice is correlated with behavioral responses following cocaine, effectively predicting cocaine sensitivity. Expression of the voltage-gated potassium channels KCNQ3 and KCNQ5 that control intrinsic cellular excitability following cocaine was downregulated, contributing to the elevation in GPePV cell excitability. Acutely activating channels containing KCNQ3 and/or KCNQ5 using the small molecule carnosic acid, a key psychoactive component of Salvia rosmarinus (rosemary) extract, reduced GPePV cell excitability and impaired cocaine reward, sensitization, and volitional cocaine intake, indicating its therapeutic potential to counteract psychostimulant use disorder.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Cocaine
/
Ventral Tegmental Area
/
Globus Pallidus
Limits:
Animals
Language:
En
Journal:
Neuron
Journal subject:
NEUROLOGIA
Year:
2024
Document type:
Article
Affiliation country:
United States
Country of publication:
United States