Publikationsdatum:
2001-05-08
Beschreibung:
Glial cells express a variety of neurotransmitter receptors. Notably, Bergmann glial cells in the cerebellum have Ca2+-permeable alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA)-type glutamate receptors (AMPARs) assembled without the GluR2 subunit. To elucidate the role of these Ca2+-permeable AMPARs, we converted them into Ca2+-impermeable receptors by adenoviral-mediated delivery of the GluR2 gene. This conversion retracted the glial processes ensheathing synapses on Purkinje cell dendritic spines and retarded the removal of synaptically released glutamate. Furthermore, it caused multiple innervation of Purkinje cells by the climbing fibers. Thus, the glial Ca2+-permeable AMPARs are indispensable for proper structural and functional relations between Bergmann glia and glutamatergic synapses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Iino, M -- Goto, K -- Kakegawa, W -- Okado, H -- Sudo, M -- Ishiuchi, S -- Miwa, A -- Takayasu, Y -- Saito, I -- Tsuzuki, K -- Ozawa, S -- New York, N.Y. -- Science. 2001 May 4;292(5518):926-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Gunma University School of Medicine, Maebashi, Gunma 371-8511, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11340205" target="_blank"〉PubMed〈/a〉
Schlagwort(e):
Adenoviridae/genetics
;
Animals
;
Astrocytes/cytology/*physiology
;
Calcium/*metabolism
;
Calcium Signaling
;
Excitatory Postsynaptic Potentials
;
Genetic Vectors
;
Green Fluorescent Proteins
;
In Vitro Techniques
;
Luminescent Proteins/genetics
;
Membrane Potentials
;
Patch-Clamp Techniques
;
Permeability
;
Purkinje Cells/cytology/*physiology
;
Rats
;
Receptors, AMPA/genetics/*metabolism
;
Synapses/metabolism/*physiology
;
*Synaptic Transmission
;
Transfection
;
alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid/pharmacology
Print ISSN:
0036-8075
Digitale ISSN:
1095-9203
Thema:
Biologie
,
Chemie und Pharmazie
,
Informatik
,
Medizin
,
Allgemeine Naturwissenschaft
,
Physik
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