Previous studies have implicated cannabinoids in extinction of conditioned fear. We have recently showed that intraventricular infusion of the phytocannabinoid cannabidiol (CBD) facilitates fear extinction, but the brain regions underlying this effect remained unknown. Here we demonstrate that repeated microinjections of CBD into the infralimbic cortex (IL) facilitated fear extinction, as indicated by reduced levels of freezing during extinction test. Systemic administration of the CB1 receptor antagonist rimonabant blocked the effects of intra-IL CBD, suggesting that CBD acts through CBI receptors to facilitate fear extinction. Our findings suggest a potential therapeutic use of CBD for extinction-based therapies of aversive memories in humans. (c) 2013 Elsevier B.V. All rights reserved.
机构:
Univ Fed Rio Grande do Sul, Inst Hlth Sci, Psychobiol & Neurocomp Lab, BR-91501970 Porto Alegre, RS, Brazil
Univ Fed Rio Grande do Sul, Inst Hlth Sci, Grad Program Neurosci, BR-91501970 Porto Alegre, RS, BrazilUniv Fed Rio Grande do Sul, Inst Hlth Sci, Psychobiol & Neurocomp Lab, BR-91501970 Porto Alegre, RS, Brazil
Santana, Fabiana
Sierra, Rodrigo O.
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Univ Fed Rio Grande do Sul, Inst Hlth Sci, Psychobiol & Neurocomp Lab, BR-91501970 Porto Alegre, RS, Brazil
Univ Fed Rio Grande do Sul, Inst Hlth Sci, Grad Program Neurosci, BR-91501970 Porto Alegre, RS, BrazilUniv Fed Rio Grande do Sul, Inst Hlth Sci, Psychobiol & Neurocomp Lab, BR-91501970 Porto Alegre, RS, Brazil
Sierra, Rodrigo O.
Haubrich, Josue
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Univ Fed Rio Grande do Sul, Inst Hlth Sci, Psychobiol & Neurocomp Lab, BR-91501970 Porto Alegre, RS, Brazil
Univ Fed Rio Grande do Sul, Inst Hlth Sci, Grad Program Neurosci, BR-91501970 Porto Alegre, RS, BrazilUniv Fed Rio Grande do Sul, Inst Hlth Sci, Psychobiol & Neurocomp Lab, BR-91501970 Porto Alegre, RS, Brazil
Haubrich, Josue
Crestani, Ana Paula
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Univ Fed Rio Grande do Sul, Inst Hlth Sci, Psychobiol & Neurocomp Lab, BR-91501970 Porto Alegre, RS, Brazil
Univ Fed Rio Grande do Sul, Inst Hlth Sci, Grad Program Neurosci, BR-91501970 Porto Alegre, RS, BrazilUniv Fed Rio Grande do Sul, Inst Hlth Sci, Psychobiol & Neurocomp Lab, BR-91501970 Porto Alegre, RS, Brazil
Crestani, Ana Paula
Duran, Johanna Marcela
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Univ Fed Rio Grande do Sul, Inst Hlth Sci, Psychobiol & Neurocomp Lab, BR-91501970 Porto Alegre, RS, Brazil
Univ Fed Rio Grande do Sul, Inst Hlth Sci, Grad Program Neurosci, BR-91501970 Porto Alegre, RS, BrazilUniv Fed Rio Grande do Sul, Inst Hlth Sci, Psychobiol & Neurocomp Lab, BR-91501970 Porto Alegre, RS, Brazil
Duran, Johanna Marcela
Cassini, Lindsey de Freitas
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Univ Fed Rio Grande do Sul, Inst Hlth Sci, Psychobiol & Neurocomp Lab, BR-91501970 Porto Alegre, RS, Brazil
Univ Fed Rio Grande do Sul, Inst Hlth Sci, Grad Program Neurosci, BR-91501970 Porto Alegre, RS, BrazilUniv Fed Rio Grande do Sul, Inst Hlth Sci, Psychobiol & Neurocomp Lab, BR-91501970 Porto Alegre, RS, Brazil
Cassini, Lindsey de Freitas
Alvares, Lucas de Oliveira
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机构:
Univ Fed Rio Grande do Sul, Inst Hlth Sci, Biosci Inst, Neurobiol Memory Lab,Biophys Dept, BR-91501970 Porto Alegre, RS, Brazil
Univ Fed Rio Grande do Sul, Inst Hlth Sci, Grad Program Neurosci, BR-91501970 Porto Alegre, RS, BrazilUniv Fed Rio Grande do Sul, Inst Hlth Sci, Psychobiol & Neurocomp Lab, BR-91501970 Porto Alegre, RS, Brazil
Alvares, Lucas de Oliveira
Quillfeldt, Jorge A.
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Univ Fed Rio Grande do Sul, Inst Hlth Sci, Psychobiol & Neurocomp Lab, BR-91501970 Porto Alegre, RS, Brazil
Univ Fed Rio Grande do Sul, Inst Hlth Sci, Grad Program Neurosci, BR-91501970 Porto Alegre, RS, BrazilUniv Fed Rio Grande do Sul, Inst Hlth Sci, Psychobiol & Neurocomp Lab, BR-91501970 Porto Alegre, RS, Brazil
机构:
Univ Colorado, Dept Psychol & Neurosci, Boulder, CO 80309 USAUniv Colorado, Dept Psychol & Neurosci, Boulder, CO 80309 USA
Thompson, Brittany M.
Baratta, Michael V.
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机构:
MIT Media Lab, Cambridge, MA 02139 USA
MIT, Dept Brain & Cognit Sci, Cambridge, MA 02139 USAUniv Colorado, Dept Psychol & Neurosci, Boulder, CO 80309 USA
Baratta, Michael V.
Biedenkapp, Joseph C.
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MIT, Picower Inst Learning & Memory, Cambridge, MA 02139 USAUniv Colorado, Dept Psychol & Neurosci, Boulder, CO 80309 USA
Biedenkapp, Joseph C.
Rudy, Jerry W.
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Univ Colorado, Dept Psychol & Neurosci, Boulder, CO 80309 USAUniv Colorado, Dept Psychol & Neurosci, Boulder, CO 80309 USA
Rudy, Jerry W.
Watkins, Linda R.
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Univ Colorado, Dept Psychol & Neurosci, Boulder, CO 80309 USAUniv Colorado, Dept Psychol & Neurosci, Boulder, CO 80309 USA
Watkins, Linda R.
Maier, Steven F.
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Univ Colorado, Dept Psychol & Neurosci, Boulder, CO 80309 USAUniv Colorado, Dept Psychol & Neurosci, Boulder, CO 80309 USA