Probing Native CB<sub>2</sub> Receptor Mobility in Plasma Membranes of Living Cells by Fluorescence Recovery After Photobleaching
In this study, we employed a novel fluorescent probe, RO7304924 - which selectively targets cannabinoid 2 receptor (CB<sub>2</sub>R) - to assess the lateral mobility of CB<sub>2</sub>R 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 CB<sub>2</sub>R, 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 CB<sub>2</sub>R mobility in living cells, and its impact on receptor-dependent cellular processes.
Authors
- Alessandro Leuti (ORCID: https://orcid.org/0000-0002-5982-0682)
- Francesca Ciaramellano (ORCID: https://orcid.org/0000-0002-1899-8628)
- Erick M. Carreira (ORCID: https://orcid.org/0000-0003-1472-490X)
- Alexandrine D. E. Kurtz
- Patrick Pfaff (ORCID: https://orcid.org/0000-0002-9761-2497)
- Uwe Grether (ORCID: https://orcid.org/0000-0002-3164-9270)
- Matthias V. Westphal (ORCID: https://orcid.org/0000-0003-0693-0789)
- Sergio Oddi (ORCID: https://orcid.org/0000-0002-6217-698X)
- Roman C. Sarott (ORCID: https://orcid.org/0000-0001-8789-6150)
- Mauro Maccarrone (ORCID: https://orcid.org/0000-0002-3990-2963)
Institutions
- Roche (Switzerland) (CH)
- University of Teramo (IT)
- Università Campus Bio-Medico (IT)
- University of L'Aquila (IT)
- ETH Zurich (CH)
- European Brain Research Institute (IT)
- Fondazione Santa Lucia (IT)
Publication Details
- Journal
- ChemBioChem
- Published
- 2025-01-16
- DOI
- https://doi.org/10.1002/cbic.202400921
- Primary Topic
- Pancreatic function and diabetes
- Type
- article
- Field-Weighted Citation Impact
- 0.00