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Updated: Jun 2, 2025
High-resolution Spatiotemporal Analysis of Receptor Dynamics by Single-molecule Fluorescence Microscopy
Published on: July 25, 2014
Probing Native CB2 Receptor Mobility in Plasma Membranes of Living Cells by Fluorescence Recovery After
Francesca Ciaramellano1, Alessandro Leuti1,2, Alexandrine D E Kurtz3
1European Center for Brain Research/Institute for Research and Health Care (IRCCS) Santa Lucia Foundation, Via del Fosso di Fiorano 64, 00143, Rome, Italy.
Abstract:
In this study, we employed a novel fluorescent probe, RO7304924 - which selectively targets cannabinoid 2 receptor (CB2R) - to assess the lateral mobility of CB2R within the plasma membrane of Chinese hamster ovary cells stably expressing a functional, untagged receptor variant. Utilizing confocal fluorescence recovery after photobleaching (FRAP), we quantified the diffusion coefficient and mobile fraction of CB2R, thereby demonstrating the efficacy of RO7304924 as an innovative tool for elucidating the dynamics of this major endocannabinoid-binding G protein-coupled receptor. Our present findings highlight the potential of combining advanced ligand-based fluorescent probes with FRAP for future investigations into the biochemical details of CB2R mobility in living cells, and its impact on receptor-dependent cellular processes.
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