Details

Autor(en) / Beteiligte

• Kevin, Richard C
• Mirlohi, Somayeh
• Manning, Jamie J
• Boyd, Rochelle
• Cairns, Elizabeth A
• Ametovski, Adam
• Lai, Felcia
• Luo, Jia Lin
• Jorgensen, William
• Ellison, Ross
• Gerona, Roy R
• Hibbs, David E
• McGregor, Iain S
• Glass, Michelle
• Connor, Mark
• Bladen, Chris
• Zamponi, Gerald W
• Banister, Samuel D

Titel

Putative Synthetic Cannabinoids MEPIRAPIM, 5F-BEPIRAPIM (NNL-2), and Their Analogues Are T‑Type Calcium Channel (CaV3) Inhibitors

Ist Teil von

• ACS chemical neuroscience, 2022-05, Vol.13 (9), p.1395-1409

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2022

Quelle

MEDLINE

Beschreibungen/Notizen

• Synthetic cannabinoid receptor agonists (SCRAs) are a large and growing class of new psychoactive substances (NPSs). Two recently identified compounds, MEPIRAPIM and 5F-BEPIRAPIM (NNL-2), have not been confirmed as agonists of either cannabinoid receptor subtype but share structural similarities with both SCRAs and a class of T-type calcium channel (CaV3) inhibitors under development as new treatments for epilepsy and pain. In this study, MEPIRAPIM and 5F-BEPIRAPIM and 10 systematic analogues were synthesized, analytically characterized, and pharmacologically evaluated using in vitro cannabinoid receptor and CaV3 assays. Several compounds showed micromolar affinities for CB1 and/or CB2, with several functioning as low potency agonists of CB1 and CB2 in a membrane potential assay. 5F-BEPIRAPIM and four other derivatives were identified as potential CaV3 inhibitors through a functional calcium flux assay (>70% inhibition), which was further confirmed using whole-cell patch-clamp electrophysiology. Additionally, MEPIRAPIM and 5F-BEPIRAPIM were evaluated in vivo using a cannabimimetic mouse model. Despite detections of MEPIRAPIM and 5F-BEPIRAPIM in the NPS market, only the highest MEPIRAPIM dose (30 mg/kg) elicited a mild hypothermic response in mice, with no hypothermia observed for 5F-BEPIRAPIM, suggesting minimal central CB1 receptor activity.