Unlimited Access to Heroin Self-Administration: Independent Motivational Markers of Opiate Dependence
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چکیده
منابع مشابه
Effects of opiate antagonists and their quaternary derivatives on heroin self-administration in the rat.
Quaternary derivatives of naloxone and naltrexone, methyl naloxonium chloride(ORG 10908) and naltrexone methobromide ( MRZ 2663BR ), respectively, were compared with the parent compounds for their ability to antagonize the reinforcing properties of heroin as measured in an operant, i.v., self-administration paradigm. As expected, lower doses (up to 0.2 mg/kg) of naloxone and naltrexone produced...
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The purpose of this study was to evaluate the effects of a morphine-conjugate vaccine (M-KLH) on the acquisition, maintenance, and reinstatement of heroin self-administration (HSA) in rats, and on heroin and metabolite distribution during heroin administration that approximated the self-administered dosing rate. Vaccination with M-KLH blocked heroin-primed reinstatement of heroin responding. Va...
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Introduction: The competence of opiate addicts to give a valid consent to heroin prescription (HP) has been doubted in principle under the assumption that the pathological urge to use heroin would prevent them from reasonably weighing the pros and cons of HP. This study was done to test whether opiate addicts have a differentiated attitude towards HP which would be a basis for an individual dec...
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Rats with a previous history of heroin self-administration were studied to assess interactions occurring between cannabinoids and opioids in an animal model of reinstatement of heroin-seeking behaviour. Rats were trained to self-administer heroin and after a long-term extinction were primed with one of the following non-contingent non-reinforced drug administrations: saline (or vehicle), heroin...
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An emerging hypothesis to explain the mechanism of heroin-induced positive reinforcement states that opiates inhibit gamma-aminobutyric acid (GABA)-ergic interneurons within the mesocorticolimbic dopamine (DA) system to disinhibit DA neurons. In support of this hypothesis, we report that the development of heroin self-administration (SA) behavior in drug-naive rats and the maintenance of SA beh...
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ژورنال
عنوان ژورنال: Neuropsychopharmacology
سال: 2006
ISSN: 0893-133X,1740-634X
DOI: 10.1038/sj.npp.1301008