Abstract:
:Recently, the tryptophan-containing noncationizable opioid peptides emerged with atypical structure and unexpected in vivo activity. Herein, we describe analogs of the naturally occurring mixed κ/μ-ligand c[Phe-d-Pro-Phe-Trp] 1 (CJ-15,208). Receptor affinity, selectivity, and agonism/antagonism varied upon enlarging macrocycle size, giving the μ-agonist 9 or the δ-antagonist 10 characterized by low nanomolar affinity. In particular, the μ-agonist c[β-Ala-d-Pro-Phe-Trp] 9 was shown to elicit potent antinociception in a mouse model of visceral pain upon systemic administration.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
De Marco R,Bedini A,Spampinato S,Cavina L,Pirazzoli E,Gentilucci Ldoi
10.1021/acs.jmedchem.6b00420subject
Has Abstractpub_date
2016-10-13 00:00:00pages
9255-9261issue
19eissn
0022-2623issn
1520-4804journal_volume
59pub_type
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