TY - JOUR AB - The effects of loreclezole and La3+ on native cerebellar GABA(A) receptors were compared between GABA(A) receptor alpha6 subunit-deficient (alpha6-/-) and wildtype mouse lines, produced through homologous recombination, using t-[35S]butylbicyclophosphorothionate ([35S]TBPS) autoradiography in brain sections. In the alpha6 subunit-deficient mice, the GABA receptor antagonistic ability of La3+ was abolished in the cerebellar granule cell layer, consistent with its opposite actions on alpha6- and of alpha1 subunit-containing receptors. La3+ significantly potentiated the action of GABA in the molecular layer of the alpha6-/- mice, but not in that of the wildtype mice. The potentiation of agonistic GABA inhibition of [35S]TBPS binding by loreclezole in alpha6-/- granule cells was reduced, suggesting an emergence of low-affinity GABA(A) receptors. The present results thus identified two ligands that may be useful in studying functional roles of cerebellar alpha1 and alpha6 subunit-containing GABA(A) receptor subtypes. AU - Makela,R AU - Wisden,W AU - Korpi,ER EP - 105 PY - 1999/// SN - 0014-2999 SP - 101 TI - Loreclezole and La3+ differentiate cerebellar granule cell GABA(A) receptor subtypes T2 - Eur J Pharmacol UR - http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=10082271 VL - 367 ER -