Imperial College London

Prof. William Wisden F. Med. Sci.

Faculty of Natural SciencesDepartment of Life Sciences

Chair in Molecular Neuroscience
 
 
 
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Contact

 

+44 (0)20 7594 9744w.wisden Website CV

 
 
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Location

 

401BSir Ernst Chain BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Nusser:1999,
author = {Nusser, Z and Ahmad, Z and Tretter, V and Fuchs, K and Wisden, W and Sieghart, W and Somogyi, P},
journal = {Eur J Neurosci},
pages = {1685--1697},
title = {Alterations in the expression of GABA-A receptor subunits in cerebellar granule cells after the disruption of the alpha6 subunit gene},
url = {http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=10215922},
volume = {11},
year = {1999}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Any given subunit of the heteromultimeric type-A gamma-aminobutyric acid (GABA) GABAA receptor may be present in several receptor subtypes expressed by individual neurons. Changes in the expression of a subunit may result in differential changes in the expression of other subunits depending on the subunit composition of the receptor subtype, leading to alterations in neuronal responsiveness to GABA. We used the targeted disruption of the alpha6 subunit gene to test for changes in the expression of other GABAA receptor subunits. Immunoprecipitation and ligand binding experiments indicated that GABAA receptors were reduced by approximately 50% in the cerebellum of alpha6 -/- mice. Western blot experiments indicated that the alpha6 subunit protein completely disappeared from the cerebellum of alpha6 -/- mice, which resulted in the disappearance of the delta subunit from the plasma membrane of granule cells. The amount of beta2, beta3 and gamma2 subunits was reduced by approximately 50%, 20% and 40%, respectively, in the cerebella of alpha6 -/- mice. A comparison of the reduction in the level of alpha1, beta2, beta3, gamma2, or delta-subunit-containing receptors in alpha6 -/- cerebellum with those observed after removal of alpha6-subunit-containing receptors from the cerebella of alpha6 +/+ mice by immuno-affinity chromatography demonstrated the presence of a significantly higher than expected proportion of receptors containing beta3 subunits in alpha6 -/- mice. The receptors containing alpha1, beta2, beta3 and gamma2 subunits were present in the plasma membrane of granule cells of alpha6 -/- mice at both synaptic and extrasynaptic sites, as shown by electron microscopic immunocytochemistry. Despite the changes, the alpha1 subunit content of Golgi-cell-to-granule-cell synapses in alpha6 -/- animals remained unaltered, as did the frequency of alpha1 immunopositive synapses in the glomeruli. Furthermore, no change was apparent in the expression of the alpha1, beta2 and ga
AU - Nusser,Z
AU - Ahmad,Z
AU - Tretter,V
AU - Fuchs,K
AU - Wisden,W
AU - Sieghart,W
AU - Somogyi,P
EP - 1697
PY - 1999///
SN - 0953-816X
SP - 1685
TI - Alterations in the expression of GABA-A receptor subunits in cerebellar granule cells after the disruption of the alpha6 subunit gene
T2 - Eur J Neurosci
UR - http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=10215922
VL - 11
ER -