کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2493657 1556652 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Methylphenidate and μ opioid receptor interactions: A pharmacological target for prevention of stimulant abuse
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
پیش نمایش صفحه اول مقاله
Methylphenidate and μ opioid receptor interactions: A pharmacological target for prevention of stimulant abuse
چکیده انگلیسی

Methylphenidate (MPH) is one of the most commonly used and highly effective treatments for attention deficit hyperactivity disorder (ADHD) in children and adults. As the therapeutic use of MPH has increased, so has its abuse and illicit street-use. Yet, the mechanisms associated with development of MPH-associated abuse and dependence are not well understood making it difficult to develop methods to help its mitigation. As a result, many ADHD patients especially children and youth, that could benefit from MPH treatment do not receive it and risk lifelong disabilities associated with untreated ADHD. Therefore, understanding the mechanisms associated with development of MPH addiction and designing methods to prevent it assume high public health significance. Using a mouse model we show that supra-therapeutic doses of MPH produce rewarding effects (surrogate measure for addiction in humans) in a conditioned place preference paradigm and upregulate μ opioid receptor (MOPR) activity in the striatum and nucleus accumbens, brain regions associated with reward circuitry. Co-administration of naltrexone, a non-selective opioid receptor antagonist, prevents MPH-induced MOPR activation and the rewarding effects. The MPH-induced MOPR activation and rewarding effect require activation of the dopamine D1 but not the D2-receptor. These findings identify the MOPR as a potential target for attenuating rewarding effects of MPH and suggest that a formulation that combines naltrexone with MPH could be a useful pharmaceutical approach to alleviate abuse potential of MPH and other stimulants.


► High but not low doses of methylphenidate produce rewarding effects.
► High but not low doses of methylphenidate activate μ opioid receptors.
► Naltrexone attenuates methylphenidate-induced μ opioid receptor activation.
► Naltrexone attenuates methylphenidate-induced conditioned place preference.
► The μ opioid receptor is a pharmacological target for stimulant abuse prevention.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuropharmacology - Volume 61, Issues 1–2, July–August 2011, Pages 283–292
نویسندگان
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