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GR127935: a potent and selective 5-HT1D receptor antagonist

M Skingle1, D T Beattie, D I Scopes

  • 1Glaxo Research and Development Ltd., Herts, UK.

Behavioural Brain Research
|January 1, 1996
PubMed
Summary

GR127935 is a potent 5-HT1D receptor antagonist with nanomolar affinity. This compound effectively blocks 5-HT1D receptor functions in vivo and in vitro, demonstrating a good safety profile for research use.

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Area of Science:

  • Pharmacology
  • Neuroscience
  • Receptor Biology

Background:

  • The 5-HT1D receptor is a key target in neurological research.
  • Selective antagonists are crucial for understanding receptor function.

Purpose of the Study:

  • To characterize the novel 5-HT1D receptor antagonist, GR127935.
  • To evaluate its potency, selectivity, and duration of action.

Main Methods:

  • In vitro receptor binding assays to determine affinity.
  • In vivo studies in guinea-pigs and dogs to assess functional antagonism.
  • Assessment of selectivity against other serotonin and non-serotonin receptors.

Main Results:

  • GR127935 exhibits nanomolar affinity for human 5-HT1D receptors.

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  • It potently and insurmountably antagonizes 5-HT1D-mediated effects, including vasoconstriction and hypothermia.
  • GR127935 shows high selectivity, with low affinity for other receptors and no effect on 5-HT2 or 5-HT1A mediated responses.
  • The compound demonstrates a long duration of action and a favorable safety profile across tested species.

    • Conclusions:

    • GR127935 is the most potent 5-HT1D receptor antagonist described to date.
    • Its characteristics make it a valuable pharmacological tool for investigating 5-HT1D receptor roles.
    • The compound's selectivity and safety profile support its utility in preclinical research.