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. 1981 Apr 9;70(4):531-40.
doi: 10.1016/0014-2999(81)90364-2.

Analogues of beta-LPH61-64 possessing selective agonist activity at mu-opiate receptors

B K Handa, A C Land, J A Lord, B A Morgan, M J Rance, C F Smith

Analogues of beta-LPH61-64 possessing selective agonist activity at mu-opiate receptors

B K Handa et al. Eur J Pharmacol. .

Abstract

Peptides based in the stabilised tetrapeptide HTyr-D-Ala-Gly-MePheOH have been synthesised and shown to have substantial opioid activity both in vitro and in vivo. The selectivity of these compounds of different receptor populations has been investigated using both isolated tissue assays and binding studies. Results suggest that the compounds are potent agonists at mu-receptors with little or no affinity for the delta-receptor population. One of the compounds, RX783006 (HTyr-D-Ala-Gly-MePhe-NH(CH2)2OH), has been tritiated to high specific radioactivity and may prove to be a useful probe in the elucidation of the function of the heterogenous opiate receptor population.

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