Evidence for the Existence of a Specific G Protein-Coupled Receptor Activated by Guanosine
Guanosine, released extracellularly from neurons and glial cells, plays important roles in the central nervous system, including neuroprotection. The innovative DELFIA Eu‐GTP binding assay was optimized for characterization of the putative guanosine receptor binding site at rat brain membranes by us...
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Published in | ChemMedChem Vol. 6; no. 6; pp. 1074 - 1080 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
06.06.2011
WILEY‐VCH Verlag |
Subjects | |
Online Access | Get full text |
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Summary: | Guanosine, released extracellularly from neurons and glial cells, plays important roles in the central nervous system, including neuroprotection. The innovative DELFIA Eu‐GTP binding assay was optimized for characterization of the putative guanosine receptor binding site at rat brain membranes by using a series of novel and known guanosine derivatives. These nucleosides were prepared by modifying the purine and sugar moieties of guanosine at the 6‐ and 5′‐positions, respectively. Results of these experiments prove that guanosine, 6‐thioguanosine, and their derivatives activate a G protein‐coupled receptor that is different from the well‐characterized adenosine receptors.
Catching the elusive guanosine receptor: The innovative DELFIA Eu‐GTP binding assay was applied to characterize the guanosine binding site by using novel and known guanosine derivatives. Some of the tested compounds, which proved to be full agonists with EC50 values in the low nanomolar range, could be useful tools for further characterization of the putative guanosine receptor. |
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Bibliography: | ark:/67375/WNG-4KWJCTR1-5 ArticleID:CMDC201100100 istex:4993D0C7D3EB3A31C86498FACF1B01A4A199CEA8 Italian Ministry for University and Research - No. PRIN2008 Ministry for Health - No. RF-CNM-2007-662855 These authors contributed equally to this work. ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1860-7179 1860-7187 |
DOI: | 10.1002/cmdc.201100100 |