Resumen
We apply the magic methyl effect to improve the potency/efficacy of GAT211, the prototypic 2-phenylindole-based cannabinoid type-1 receptor (CB1R) agonist-positive allosteric modulator (ago-PAM). Introducing a methyl group at the α-position of nitro group generated two diastereomers, the greater potency and efficacy oferythro, (±)-vsthreo, (±)-constitutes the first demonstration of diastereoselective CB1R-allosteric modulator interaction. Of the (±)-9enantiomers, (−)-(S,R)-13evidenced improved potency over GAT211 as a CB1R ago-PAM, whereas (+)-(R,S)-14was a CB1R allosteric agonist biased toward G protein- vs β-arrestin1/2-dependent signaling. (−)-(S,R)-13and (+)-(R,S)-14were devoid of undesirable side effects (triad test), and (+)-(R,S)-14reduced intraocular pressure with an unprecedentedly long duration of action in a murine glaucoma model. (−)-(S,R)-13docked into both a CB1R extracellular PAM and intracellular allosteric-agonist site(s), whereas (+)-(R,S)-14preferentially engaged only the latter. Exploiting G-protein biased CB1R-allosteric modulation can offer safer therapeutic candidates for glaucoma and, potentially, other diseases.
Idioma original | English |
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Páginas (desde-hasta) | 8104-8126 |
Número de páginas | 23 |
Publicación | Journal of Medicinal Chemistry |
Volumen | 64 |
N.º | 12 |
DOI | |
Estado | Published - jun. 24 2021 |
Nota bibliográfica
Funding Information:This work was supported by EY024727 (to G.A.T., R.G.P., A.S., and M.E.M.K.), R01 DA045698, T32 DA007237, and P30 DA013429 (to M.E.A. and L.M.L), a partnership grant to RBL from GlaxoSmithKline and the Canadian Institutes of Health Research (CIHR) (201704), and a Project Grant to RBL (201909). T.B. and A.Z. are supported by research scholarships from the College of Pharmacy and Nutrition, University of Saskatchewan.
Publisher Copyright:
© 2021 American Chemical Society
ASJC Scopus Subject Areas
- Molecular Medicine
- Drug Discovery
PubMed: MeSH publication types
- Journal Article
- Research Support, N.I.H., Extramural
- Research Support, Non-U.S. Gov't