کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10586084 | 981385 | 2010 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evaluation of N-substitution in 6,7-benzomorphan compounds
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
6,7-Benzomorphan derivatives, exhibiting different μ, δ, and κ receptor selectivity profiles depending on the N-substituent, represent a useful skeleton for the synthesis of new and better analgesic agents. In this work, an aromatic ring and/or alkyl residues have been used with an N-propanamide or N-acetamide spacer for the synthesis of a new series of 5,9-dimethyl-2â²-hydroxy-6,7-benzomorphan derivatives (12-22). Data obtained by competition binding assays showed that the μ opioid receptor seems to prefer an interaction with the 6,7-benzomorphan ligands having an N-substituent with a propanamide spacer and less hindered amide. Highly stringent features are required for δ receptor interaction, while an N-acetamide spacer and/or bulkier amide could preferentially lead to κ receptor selectivity. In the propanamide series, compound 12 (named LP1) displayed high μ affinity (Ki = 0.83 nM), good δ affinity (Ki = 29 nM) and low affinity for the κ receptor (Ki = 110 nM), with a selectivity ratio δ/μ and κ/μ of 35.1 and 132.5, respectively. Further, in the adenylyl cyclase assay, LP1 displayed a μ/δ agonist profile, with IC50 values of 4.8 and 12 nM at the μ and δ receptors, respectively. The antinociceptive potency of LP1 in the tail-flick test after sc administration in rat was comparable with the potency of morphine (ED50 = 2.03 and 2.7 mg/kg, respectively), and was totally reversed by naloxone. LP1, possessing a μ/δ agonist profile, could represent a lead in further developing benzomorphan-based ligands with potent in vivo analgesic activity and a reduced tendency to induce side effects.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioorganic & Medicinal Chemistry - Volume 18, Issue 14, 15 July 2010, Pages 4975-4982
Journal: Bioorganic & Medicinal Chemistry - Volume 18, Issue 14, 15 July 2010, Pages 4975-4982
نویسندگان
Lorella Pasquinucci, Orazio Prezzavento, Agostino Marrazzo, Emanuele Amata, Simone Ronsisvalle, Zafiroula Georgoussi, Danai-Dionysia Fourla, Giovanna M. Scoto, Carmela Parenti, Giuseppina Aricò, Giuseppe Ronsisvalle,