Abstract:
:Nalfurafine, a κ-selective opioid receptor agonist, unexpectedly showed a selective antagonist activity toward the orexin 1 receptor (OX1R) (Ki = 250 nM). Modification of the 17-amino side chain of the opioid ligand to an arylsulfonyl group and the 6-furan acrylamide chain to 2-pyridyl acrylamide led to compound 71 with improvement of the antagonist activity (OX1R, Ki = 1.36 nM; OX2R, not active) without any detectable affinity for the opioid receptor. The dihydrosulfate salt of 71, freely soluble in water, attenuated the physical dependence of morphine. Furthermore, all of the active nalfurafine derivatives in this study had almost no activity for OX2R, which led to high OX1R selectivity. These results suggest that nalfurafine derivatives could be a useful series of lead compounds to develop highly selective OX1R antagonists.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Nagase H,Yamamoto N,Yata M,Ohrui S,Okada T,Saitoh T,Kutsumura N,Nagumo Y,Irukayama-Tomobe Y,Ishikawa Y,Ogawa Y,Hirayama S,Kuroda D,Watanabe Y,Gouda H,Yanagisawa Mdoi
10.1021/acs.jmedchem.6b01418subject
Has Abstractpub_date
2017-02-09 00:00:00pages
1018-1040issue
3eissn
0022-2623issn
1520-4804journal_volume
60pub_type
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