Bimodal control of stimulated food intake by the endocannabinoid system.
Activation of cannabinoid type-1 receptors (CB(1)) 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 CB(1) receptors exerted a hypophagic action through inhibition of GABAergic transmission. Conversely, brain CB(1) receptors modulating excitatory transmission mediated the well-known orexigenic effects of cannabinoids.
INSERM U862, NeuroCentre Magendie, Endocannabinoids and Neuroadaptation, Bordeaux, France.
Luigi
L
Bellocchio
Pauline
P
Lafenêtre
Astrid
A
Cannich
Daniela
D
Cota
Nagore
N
Puente
Pedro
P
Grandes
Francis
F
Chaouloff
Pier Vincenzo
PV
Piazza
Giovanni
G
Marsicano
D000818:Animals; D001835:Body Weight; D001921:Brain / Q000187:drug effects / Q000502:physiology; D003342:Corpus Striatum / Q000187:drug effects / Q000502:physiology*; D004435:Eating / Q000187:drug effects / Q000502:physiology*; D005215:Fasting / Q000502:physiology; D018698:Glutamic Acid / Q000378:metabolism; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D008822:Mice, Transgenic; D009433:Neural Inhibition / Q000187:drug effects / Q000502:physiology; D009474:Neurons / Q000187:drug effects / Q000502:physiology*; D012333:RNA, Messenger / Q000378:metabolism; D043884:Receptor, Cannabinoid, CB1 / Q000235:genetics / Q000378:metabolism*; D011963:Receptors, GABA-A / Q000378:metabolism; D016194:Receptors, N-Methyl-D-Aspartate / Q000378:metabolism; D009435:Synaptic Transmission / Q000187:drug effects / Q000502:physiology; D013997:Time Factors; D005680:gamma-Aminobutyric Acid / Q000378:metabolism
D012333:RNA, Messenger; D043884:Receptor, Cannabinoid, CB1; D011963:Receptors, GABA-A; D016194:Receptors, N-Methyl-D-Aspartate; D018698:Glutamic Acid; D005680:gamma-Aminobutyric Acid