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Related Experiment Videos

Novel pyrrole-containing progesterone receptor modulators.

Mark A Collins1, Valerie Hudak, Reinhold Bender

  • 1Chemical and Screening Sciences, Wyeth Research, 500 Arcola Road, Collegeville, PA 19426, USA.

Bioorganic & Medicinal Chemistry Letters
|April 15, 2004
PubMed
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Researchers synthesized novel benzoxazinone and indolone compounds to modulate progesterone receptor (PR) activity. Specific pyrrole substitutions determined whether compounds acted as PR agonists or antagonists, with cyano-pyrroles showing agonistic and nitro-pyrroles showing antagonistic effects.

Area of Science:

  • Medicinal Chemistry
  • Molecular Pharmacology
  • Organic Synthesis

Background:

  • The progesterone receptor (PR) is a key target for various therapeutic applications.
  • Modulating PR activity is crucial for treating conditions like hormone-dependent cancers and reproductive disorders.
  • Developing selective PR modulators requires understanding structure-activity relationships.

Purpose of the Study:

  • To synthesize and evaluate novel benzoxazinone and indolone derivatives for their ability to modulate progesterone receptor (PR) activity.
  • To investigate the influence of substituted pyrrole moieties on PR agonistic and antagonistic properties.
  • To identify potent PR agonists and antagonists based on specific structural modifications.

Main Methods:

  • Synthesis of 1,4-dihydro-2H-[d][3,1]-benzoxazin-2-one and 1,3-dihydro-[3H]-indol-2-one scaffolds with appended pyrrole moieties.

Related Experiment Videos

  • Evaluation of synthesized compounds for progesterone receptor (PR) modulation.
  • Determination of EC50 values for agonists and IC50 values for antagonists.

    • Main Results:

    • Compounds with a 5(')-cyano-2(')-pyrrole moiety exhibited potent PR agonistic activity (e.g., EC50s of 1.1-2.8 nM).
    • Compounds featuring a 5(')-nitro-2(')-pyrrole moiety demonstrated PR antagonistic effects (e.g., IC50s of 36-180 nM).
    • Structural modifications of the pyrrole ring significantly influenced the agonist/antagonist profile of the compounds.

    Conclusions:

    • The study successfully identified novel PR modulators with distinct agonist and antagonist profiles.
    • Pyrrole moiety substitution is a critical determinant for PR agonism versus antagonism.
    • These findings provide a basis for the rational design of selective PR-targeting therapeutics.