S33-03 Imaging usual addictions : Tobacco, canabis and alcohol - 17/03/09
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Résumé |
Background |
Brain models of drug addiction are being tackled in humans, using PET and MRI.
Results |
1. | Whereas tobacco and cannabis do not interact directly with dopamine sites, positron emission tomography detected lower availability in sites regulating the catecholamines homeostasis, notably in dopamine transporter sites in striatal and in extrastriatal regions. This further supports repeated and long term substance use progress towards an adaptative diminished basal dopamine level that would contribute to the switch to an addicted brain. | ||||||
2. | Alcohol: abnormalities in brain macro- and micro- structure were searched in detoxified alcohol-dependents with preserved psychosocial functioning:
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Conclusion |
While indices of dopamine down-regulation are consistency detected in several drug addictions, even “socially-adapted” alcohol dependence may induce change in brain structure.
Psychol Med. 1998 28:1039-48.
Neuropsychopharmacology. 2007 32:429-38.
IEEE Trans Med Imaging. 2007 26:553-65
J Nucl Med. 2007 48:538-46.
Neuropsychopharmacology (Chanraud S et al., 2008 Jul 9. [Epub ahead of print]).
J Clin Psychopharmacol (Leroy C et al, in press).
Le texte complet de cet article est disponible en PDF.Vol 24 - N° S1
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