Bimodal control of stimulated food intake by the endocannabinoid system

L Bellocchio, P Lafenêtre, A Cannich, D Cota… - Nature …, 2010 - nature.com
L Bellocchio, P Lafenêtre, A Cannich, D Cota, N Puente, P Grandes, F Chaouloff, PV Piazza
Nature neuroscience, 2010nature.com
Activation of cannabinoid type-1 receptors (CB1) is universally recognized as a powerful
endogenous orexigenic signal, but the detailed underlying neuronal mechanisms are not
fully understood. Using combined genetic and pharmacological approaches in mice, we
found that ventral striatal CB1 receptors exerted a hypophagic action through inhibition of
GABAergic transmission. Conversely, brain CB1 receptors modulating excitatory
transmission mediated the well-known orexigenic effects of cannabinoids.
Abstract
Activation of cannabinoid type-1 receptors (CB1) is universally recognized as a powerful endogenous orexigenic signal, but the detailed underlying neuronal mechanisms are not fully understood. Using combined genetic and pharmacological approaches in mice, we found that ventral striatal CB1 receptors exerted a hypophagic action through inhibition of GABAergic transmission. Conversely, brain CB1 receptors modulating excitatory transmission mediated the well-known orexigenic effects of cannabinoids.
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