Title : Isoflurane modulates excitability in the mouse thalamus via GABA-dependent and GABA-independent mechanisms.

Pub. Date : 2009 Feb

PMID : 18948126






5 Functional Relationships(s)
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1 A mutant mouse was engineered to harbor two amino acid substitutions (S270H, L277A) in the GABA(A) receptor (GABA(A)-R) alpha1 subunit; this mutation abolished sensitivity to the volatile anesthetic isoflurane in recombinant GABA(A)-Rs, and reduced in vivo sensitivity to isoflurane in the loss-of-righting-reflex assay. Isoflurane gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus
2 A mutant mouse was engineered to harbor two amino acid substitutions (S270H, L277A) in the GABA(A) receptor (GABA(A)-R) alpha1 subunit; this mutation abolished sensitivity to the volatile anesthetic isoflurane in recombinant GABA(A)-Rs, and reduced in vivo sensitivity to isoflurane in the loss-of-righting-reflex assay. Isoflurane gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus
3 Consistent with this observation, isoflurane inhibited both tonic action potential and rebound burst firing in the presence of GABA(A)-R blockade. Isoflurane gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus
4 We conclude that isoflurane enhances inhibition of thalamic neurons in VB via GABA(A)-R-dependent, but in RTN via GABA(A)-R-independent, mechanisms. Isoflurane gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus
5 We conclude that isoflurane enhances inhibition of thalamic neurons in VB via GABA(A)-R-dependent, but in RTN via GABA(A)-R-independent, mechanisms. Isoflurane gamma-aminobutyric acid (GABA) A receptor, subunit gamma 2 Mus musculus