کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5738472 1615056 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of [3H] oxymorphone binding sites in mouse brain: Quantitative autoradiography in opioid receptor knockout mice
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
Characterization of [3H] oxymorphone binding sites in mouse brain: Quantitative autoradiography in opioid receptor knockout mice
چکیده انگلیسی
Oxymorphone, one of oxycodone's metabolic products, is a potent opioid receptor agonist which is thought to contribute to the analgesic effect of its parent compound and may have high potential abuse liability. Nonetheless, the in vivo pharmacological binding profile of this drug is still unclear. This study uses mice lacking mu (MOP), kappa (KOP) or delta (DOP) opioid receptors as well as mice lacking all three opioid receptors to provide full characterisation of oxymorphone binding sites in the brain. Saturation binding studies using [3H]oxymorphone revealed high affinity binding sites in mouse brain displaying Kd of 1.7 nM and Bmax of 147 fmol/mg. Furthermore, we performed quantitative autoradiography binding studies using [3H]oxymorphone in mouse brain. The distribution of [3H]oxymorphone binding sites was found to be similar to the selective MOP agonist [3H]DAMGO in the mouse brain. [3H]Oxymorphone binding was completely abolished across the majority of the brain regions in mice lacking MOP as well as in mice lacking all three opioid receptors. DOP and KOP knockout mice retained [3H]oxymorphone binding sites suggesting oxymorphone may not target DOP or KOP. These results confirm that the MOP, and not the DOP or the KOP is the main high affinity binding target for oxymorphone.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience Letters - Volume 643, 16 March 2017, Pages 16-21
نویسندگان
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