Biphalin, an enkephalin analog with unexpectedly high antinociceptive potency and low dependence liability in vivo, selectively antagonizes excitatory opioid receptor functions of sensory neurons in culture.

@article{Shen1995BiphalinAE,
  title={Biphalin, an enkephalin analog with unexpectedly high antinociceptive potency and low dependence liability in vivo, selectively antagonizes excitatory opioid receptor functions of sensory neurons in culture.},
  author={Ke Fei Shen and Stanley M. Crain},
  journal={Brain research},
  year={1995},
  volume={701 1-2},
  pages={158-66}
}
The mechanism of action of the dimeric enkephalin peptide, biphalin (Tyr-D-Ala-Gly-Phe-NH2)2, which was previously shown to have remarkable high antinociceptive potency and low dependence liability in vivo, has now been studied by electrophysiologic analyses of its effects on the action potential duration (APD) of nociceptive types of sensory dorsal root ganglion (DRG) neurons in culture. Acute application of biphalin (pM-microM) elicited only dose-dependent, naloxone-reversible inhibitory (APD… CONTINUE READING
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