Title : Independent of differences in taste, B6N mice consume less alcohol than genetically similar B6J mice, and exhibit opposite polarity modulation of tonic GABAAR currents by alcohol.

Pub. Date : 2022 Mar 15

PMID : 34933049






12 Functional Relationships(s)
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1 Independent of differences in taste, B6N mice consume less alcohol than genetically similar B6J mice, and exhibit opposite polarity modulation of tonic GABAAR currents by alcohol. Alcohols gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus
2 We previously determined that EtOH enhances cerebellar granule cell (GC) tonic GABAAR currents in low EtOH consuming rodent genotypes, but suppresses it in high EtOH consuming rodent genotypes. Ethanol gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus
3 We previously determined that EtOH enhances cerebellar granule cell (GC) tonic GABAAR currents in low EtOH consuming rodent genotypes, but suppresses it in high EtOH consuming rodent genotypes. Ethanol gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus
4 Moreover, pharmacologically counteracting EtOH suppression of GC tonic GABAAR currents reduces EtOH consumption in high alcohol consuming C57BL/6J (B6J) mice, suggesting a causative role. Ethanol gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus
5 Moreover, pharmacologically counteracting EtOH suppression of GC tonic GABAAR currents reduces EtOH consumption in high alcohol consuming C57BL/6J (B6J) mice, suggesting a causative role. Ethanol gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus
6 In the low EtOH consuming rodent models tested to date, EtOH enhancement of GC tonic GABAAR currents is mediated by inhibition of neuronal nitric oxide synthase (nNOS) which drives increased vesicular GABA release onto GCs and a consequent enhancement of tonic GABAAR currents. Ethanol gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus
7 In the low EtOH consuming rodent models tested to date, EtOH enhancement of GC tonic GABAAR currents is mediated by inhibition of neuronal nitric oxide synthase (nNOS) which drives increased vesicular GABA release onto GCs and a consequent enhancement of tonic GABAAR currents. Ethanol gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus
8 In the low EtOH consuming rodent models tested to date, EtOH enhancement of GC tonic GABAAR currents is mediated by inhibition of neuronal nitric oxide synthase (nNOS) which drives increased vesicular GABA release onto GCs and a consequent enhancement of tonic GABAAR currents. Ethanol gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus
9 Consequently, genetic variation in nNOS expression across rodent genotypes is a key determinant of whether EtOH enhances or suppresses tonic GABAAR currents, and thus EtOH consumption. Ethanol gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus
10 We used behavioral, electrophysiological, and immunocytochemical techniques to further explore the relationship between EtOH consumption and GC GABAAR current responses in C57BL/6N (B6N) mice. Ethanol gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus
11 Collectively, our data demonstrate that despite being genetically similar, B6N mice consume significantly less EtOH than B6J mice, a behavioral difference paralleled by increased cerebellar nNOS expression and opposite EtOH action on GC tonic GABAAR currents in each genotype. Ethanol gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus
12 Collectively, our data demonstrate that despite being genetically similar, B6N mice consume significantly less EtOH than B6J mice, a behavioral difference paralleled by increased cerebellar nNOS expression and opposite EtOH action on GC tonic GABAAR currents in each genotype. Ethanol gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus