Abstract
G protein-coupled receptors (GPCRs) play a key role in the regulation of physiological functions. Deregulation of their activities often results in pathological disorders and therefore these receptors constitute major targets for drug development. The emergence of new concepts such as GPCR oligomerization has modified our understanding of these proteins, and identifying the role of receptor complexes is probably a major challenge for the next decade. Various experimental strategies have been developed to study GPCR oligomers and energy transfer experiments between partners within a complex constitute one of the most convenient approaches. These experimental strategies usually require receptor fusion to tags or fluorescent or luminescent proteins and therefore cannot be easily applied to native tissues. We developed a new experimental approach based on the labeling of receptors with high affinity fluorescent ligands compatible with time-resolved energy transfer measurements. Because of the very high signal-to-noise ratio of the time-resolved fluorescent energy transfer (TR-FRET) signals, this approach constitutes a breakthrough since it allows the direct identification of wild-type GPCR oligomers in native tissues.
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Acknowledgements
Thanks are due to Dr. L. Prezeau for his critical reading of the manuscript. This work was supported by research grants from CNRS, INSERM, ACI Molécules Cibles et Thérapeutiques (no. 240 and 355), ANR (06-Blanc-0087-03). Thanks to Plate-forme de Pharmacologie-Criblage Interactome of Montpellier and the Region Languedoc-Roussillon for making this work possible.
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Cottet, M. et al. (2011). Time Resolved FRET Strategy with Fluorescent Ligands to Analyze Receptor Interactions in Native Tissues: Application to GPCR Oligomerization. In: Willars, G., Challiss, R. (eds) Receptor Signal Transduction Protocols. Methods in Molecular Biology, vol 746. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-61779-126-0_21
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DOI: https://doi.org/10.1007/978-1-61779-126-0_21
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