An imidazole based H-Phe-Phe-NH 2 peptidomimetic with anti-allodynic effect in spared nerve injury mice
作者:Anna Skogh、Anna Lesniak、Christian Sköld、Maria Karlgren、Fabienne Z. Gaugaz、Richard Svensson、Shanti Diwakarla、Anna Jonsson、Rebecca Fransson、Fred Nyberg、Mathias Hallberg、Anja Sandström
DOI:10.1016/j.bmcl.2018.06.009
日期:2018.8
The dipeptide amide H-Phe-Phe-NH2 (1) that previously was identified as a ligand for the substance P 1-7 (SP1-7) binding site exerts intriguing results in animal models of neuropathic pain after central but not after peripheral administration. The dipeptide 1 is derived from stepwise modifications of the anti-nociceptive heptapeptide SP1-7 and the tetrapeptide endomorphin-2 that is also binding to the SP1-7 site. We herein report a strong anti-allodynic effect of a new H-Phe-Phe-NH2 peptidomimetic (4) comprising an imidazole ring as a bioisosteric element, in the spare nerve injury (SNI) mice model after peripheral administration. Peptidomimetic 4 was stable in plasma, displayed a fair membrane permeability and a favorable neurotoxic profile. Moreover, the effective dose (ED50) of 4 was superior as compared to gabapentin and morphine that are used in clinic.