http://www.cnr.it/ontology/cnr/individuo/prodotto/ID14958
The endogenous cannabinoid system controls extinction of aversive memories (Articolo in rivista)
- Type
- Label
- The endogenous cannabinoid system controls extinction of aversive memories (Articolo in rivista) (literal)
- Anno
- 2002-01-01T00:00:00+01:00 (literal)
- Alternative label
Marsicano G., Wotjak C.T., Rammes G., Bisogno T., Azad S.C., Cascio M.G., Hermann H., Tang J., Hofmann C., Zieglgdnsberger W., Di Marzo V., Lutz B. (2002)
The endogenous cannabinoid system controls extinction of aversive memories
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Marsicano G., Wotjak C.T., Rammes G., Bisogno T., Azad S.C., Cascio M.G., Hermann H., Tang J., Hofmann C., Zieglgdnsberger W., Di Marzo V., Lutz B. (literal)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
- Prima evidenza mai pubblicata riguardante il coinvolgimento del sistema endocannabinoide nei processi molecolari che regolano la memoria ed in particolare lestinzione della memoria avversa. Mediante lutilizzo di topi deprivati del gene che codifica per il recettore CB1 dei cannabinoidi si è evidenziato il diretto coinvolgimento dei cannabinoidi nella fase di estinzione della memoria avversa ma non in quella di acquisizione o consolidamento. Tale tipo di studio risulta essere di primaria importanza per lo sviluppo di terapie alternative per la cura di disordini legati ad eventi post-traumatici o fobie. (literal)
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Molecular Genetics of Behaviour, Neuronal Plasticity/Mouse Behaviour and Neuropharmacology Group, Max Planck Institute of Psychiatry, Munich, Germany; Clinic of Anaesthesiology, Klinikum Grosshadem, Ludwig-Maximilians-University, Munich, Germany; Endocannabinoid Research Group, Institute of Biomolecular Chemistry, CNR, Via Campi Flegrei 34, 80078 Pozzuoli (Napoli), Italy, and Institute of Mammalian Genetics, GSF National Research Center for Environment and Health, -Munich, Germany (literal)
- Titolo
- The endogenous cannabinoid system controls extinction of aversive memories (literal)
- Abstract
- Acquisition and storage of aversive memories is one of the basic
principles of central nervous systems throughout the animal kingdom. In
the absence of reinforcement, the resulting behavioural response will
gradually diminish to be finally extinct. Despite the importance of
extinction, its cellular mechanisms are largely unknown. The cannabinoid
receptor 1 (CB1) and endocannabinoids are present in memory-related brain
areas and modulate memory. Here we show that the endogenous cannabinoid
system has a central function in extinction of aversive memories. CB1-
deficient mice showed strongly impaired short-term and long-term
extinction in auditory fear-conditioning tests, with unaffected memory
acquisition and consolidation. Treatment of wild-type mice with the CB1
antagonist SR141716A mimicked the phenotype of CB1-deficient mice,
revealing that CB1 is required at the moment of memory extinction.
Consistently, tone presentation during extinction trials resulted in
elevated levels of endocannabinoids in the basolateral amygdala complex,
a region known to control extinction of aversive memories. In the
basolateral amygdala, endocannabinoids and CB1 were crucially involved in
long-term depression of GABA (gamma-aminobutyric acid)-mediated
inhibitory currents. We propose that endocannabinoids facilitate
extinction of aversive memories through their selective inhibitory
effects on local inhibitory networks in the amygdala. (literal)
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