A new synthetic protectin D1 analog 3-oxa-PD1n-3 DPA reduces neuropathic pain and chronic itch in mice.

Journal Article (Journal Article)

The resolution of inflammation is a biosynthetically active process controlled by the interplay between oxygenated polyunsaturated mediators and G-protein coupled receptor-signaling pathways. These enzymatically oxygenated polyunsaturated fatty acids belong to distinct families of specialized pro-resolving autacoids. The protectin family of mediators has attracted an interest because of their potent pro-resolving and anti-inflammatory actions verified in several in vivo disease models. Herein, we present the stereoselective synthesis and biological evaluations of 3-oxa-PD1n-3 DPA, a protectin D1 analog. Results from mouse models indicate that the mediators protectin D1, PD1n-3 DPA and the new analog 3-oxa-PD1n-3 DPA all relieved streptozotocin-induced diabetic neuropathic pain at doses of 90 and 300 pmol, equivalent to 30 and 100 ng, respectively, following intrathecal (I.T.) injection. Of interest, at a low dose of only 30 pmol (10 ng; I.T.) only 3-oxa PD1n-3 DPA was able to alleviate neuropathic pain, directly compared to vehicle controls. Moreover, using a chronic itch model of cutaneous T-cell lymphoma (CTCL), all three compounds at 300 pmol (100 ng) showed a significant reduction in itching for several hours. The biomolecular information on the structure-functions of the protectins and the new synthetic analog 3-oxa-PD1n-3 DPA is of interest towards developing new immunoresolvents.

Full Text

Duke Authors

Cited Authors

  • Nesman, JI; Chen, O; Luo, X; Ji, R-R; Serhan, CN; Hansen, TV

Published Date

  • March 28, 2021

Published In

Volume / Issue

  • 19 / 12

Start / End Page

  • 2744 - 2752

PubMed ID

  • 33687402

Pubmed Central ID

  • PMC8016805

Electronic International Standard Serial Number (EISSN)

  • 1477-0539

Digital Object Identifier (DOI)

  • 10.1039/d0ob02136a


  • eng

Conference Location

  • England