Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/32580
Share/Impact:
Título : Noncanonical Signaling by Ionotropic Kainate Receptors
Autor : Rozas, José Luis, Paternain, Ana V., Lerma Gómez, Juan
Fecha de publicación : 31-Jul-2003
Editor: Elsevier
Citación : Neuron 39(3): 543-553 (2003)
Resumen: The potent neurotoxin kainate activates ion channel-forming receptors. However, it can also activate a G protein-coupled signaling pathway to inhibit transmitter release in central neurons. It remains unclear whether the same receptor complex is involved in both signaling activities. Here we show that in a population of dorsal root ganglion cells, exposure to kainate elicits a G protein-dependent increase in intracellular Ca2+. Furthermore, in these cells a brief exposure to kainate inhibited the K+-induced Ca2+ increase, a process that was sensitive to the G protein inhibitor Pertussis toxin and inhibitors of protein kinase C. This metabotropic action did not require ion channel activity and was not observed in neurons prepared from mice deficient for the ion channel-forming subunit GluR5. These results indicate that GluR5, an ion channel-forming subunit, signals through a second messenger cascade, inhibiting voltage-dependent Ca2+ channels. Thus, such a system represents a noncanonical signaling route of ion channel-forming receptors.
Descripción : 11 páginas, 8 figuras.
Versión del editor: http://dx.doi.org/10.1016/S0896-6273(03)00436-7
URI : http://hdl.handle.net/10261/32580
ISSN: 0896-6273
DOI: 10.1016/S0896-6273(03)00436-7
Appears in Collections:(IC) Artículos

Files in This Item:
There are no files associated with this item.
Show full item record
 
CSIC SFX LinksSFX Query


Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.