Endomorphin-1 analogs containing α-methyl-β-amino acids exhibit potent analgesic activity after peripheral administration?

Organic & Biomolecular Chemistry Pub Date: 2017-05-18 DOI: 10.1039/C7OB01115F

Abstract

This study describes the design and synthesis of endomorphin-1 analogs containing C-terminal aromatic α-methyl-β-amino acids and an N-terminal native tyrosine or 2,6-dimethyl-tyrosine. We show that, in comparison with the parent peptide, these analogs exhibit improved bioactivity and blood–brain barrier penetration after intravenous administration, and have a lower tendency to induce constipation and sedation than morphine.

Graphical abstract: Endomorphin-1 analogs containing α-methyl-β-amino acids exhibit potent analgesic activity after peripheral administration
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