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Related Experiment Videos

Phenylephrine derivatives as leukotriene D4 antagonists.

J H Musser1, D M Kubrak, R H Bender

  • 1Wyeth Laboratories, Philadelphia, Pennsylvania 19101.

Journal of Medicinal Chemistry
|November 1, 1987
PubMed
Summary

New phenylephrine derivatives show promise in treating respiratory and gastric conditions. These compounds effectively inhibit bronchospasm and protect against alcohol-induced gastric lesions in animal models.

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Area of Science:

  • Pharmacology
  • Medicinal Chemistry

Background:

  • Leukotriene D4 (LTD4) plays a significant role in inflammatory airway diseases like asthma.
  • Developing effective antagonists for LTD4 is crucial for managing bronchospasm and related conditions.

Purpose of the Study:

  • To synthesize and evaluate novel phenylephrine derivatives as potential inhibitors of LTD4-induced bronchospasm.
  • To assess the efficacy of these compounds in animal models of asthma and gastric protection.

Main Methods:

  • Synthesis of two series of phenylephrine derivatives.
  • In vivo testing for inhibition of LTD4 and ovalbumin-induced bronchospasm in guinea pigs.
  • In vitro assessment of tracheal strip contractions and coronary artery responses.
  • Evaluation in a rat model of alcohol-induced gastric lesions.

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Main Results:

  • Compound 3 (urea series) and compound 26 (oxazolidinone series) demonstrated significant oral activity against LTD4 and ovalbumin-induced bronchospasm.
  • Compound 3 acted as a competitive inhibitor of LTD4 in guinea pig tracheal strips (p kappa B = 5.22).
  • Compound 26 selectively antagonized LTD4-induced contractions (p kappa B = 6.09) and showed cardioprotective and gastroprotective effects.

Conclusions:

  • Phenylephrine derivatives, particularly compounds 3 and 26, are potent antagonists of LTD4.
  • These compounds exhibit therapeutic potential for treating asthma, cardiovascular conditions, and gastric ulcers.