Synthesis and activity of endomorphin-2 and morphiceptin analogues with proline surrogates in position 2

  • Cesare Giordano
  • , Anna Sansone
  • , Annalisa Masi
  • , Gino Lucente
  • , Pasqualina Punzi
  • , Adriano Mollica
  • , Francesco Pinnen
  • , Federica Feliciani
  • , Ivana Cacciatore
  • , Peg Davis
  • , Josephine Lai
  • , Shou Wu Ma
  • , Frank Porreca
  • , Victor Hruby

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

The opioid agonists endomorphins (Tyr-Pro-Trp-Phe-NH2; EM1 and Tyr-Pro-Phe-Phe-NH2; EM2) and morphiceptin (Tyr-Pro-Phe-Pro-NH 2) exhibit an extremely high selectivity for μ-opioid receptor. Here a series of novel EM2 and morphiceptin analogues containing in place of the proline at position 2 the S and R residues of β-homologues of proline (HPro), of 2-pyrrolidinemethanesulphonic acid (HPrs) and of 3- pyrrolidinesulphonic acid (βPrs) have been synthesized and their binding affinity and functional activity have been investigated. The highest μ-receptor affinity is shown by [(S)βPrs2]EM2 analogue (6e) which represents the first example of a β-sulphonamido analogue in the field of opioid peptides.

Original languageEnglish (US)
Pages (from-to)4594-4600
Number of pages7
JournalEuropean journal of medicinal chemistry
Volume45
Issue number10
DOIs
StatePublished - Oct 2010

Keywords

  • Endomorphins
  • Opioid peptides
  • Peptide synthesis
  • Unusual amino acids
  • β-Sulphonamido peptides

ASJC Scopus subject areas

  • Pharmacology
  • Drug Discovery
  • Organic Chemistry

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