Journal: Heliyon
Article Title: Characterisation of inverse agonism of the orphan-G protein-coupled receptor GPR52 by cannabinoid ligands Cannabidiol and O-1918
doi: 10.1016/j.heliyon.2021.e07201
Figure Lengend Snippet: In vitro characterisation of CBD, O-1918 and related compounds. A. CBD, O-1918 and related compounds are inverse agonists in CHO-GPR52 cells when tested alone, reducing cAMP down to the level of CHO-WT (black bar). Basal (DMSO) response from CHO-GPR52 (grey bar) is also shown for comparison, with dotted lines to indicate response level. Data are pooled (mean ± SD) from 4 independent experiments performed in duplicate, normalised to 1 μM 7m response. B. All inverse agonists inhibit an EC 50 concentration of the agonist compound 7m, reducing cAMP levels below the basal level in line with the apparent inverse agonism in A. C. All test compounds are inactive in CHO-WT cells, except for cannabidiol, which shows a small decrease in cellular cAMP beyond the standard deviation of the DMSO response (indicated by dotted lines). Data are pooled (mean ± SD) from 4 independent experiments performed in singlicate expressed as a percentage of the DMSO response.
Article Snippet: Takeda reported the first example of GPR52 agonists [ ], exemplified by Compound 7m , and subsequently reported related examples such as such as Compound [ ] and the orally bioavailable agonist FTBMT [ ], the pharmacology of which has been extensively characterised in vitro and in vivo.
Techniques: In Vitro, Comparison, Concentration Assay, Standard Deviation