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Selective estrogen receptor modulators offer diverse tissue-specific effects. Estetrol (E4), a novel modulator, provides dual weak estrogenic/antiestrogenic actions and is now approved for contraception.

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Area of Science:

  • Pharmacology
  • Endocrinology
  • Oncology

Background:

  • Selective estrogen receptor modulators (SERMs) exhibit tissue-specific estrogenic and antiestrogenic activities.
  • Existing SERMs like tamoxifen and raloxifene are used for breast cancer, osteoporosis, and bone loss.
  • Newer SERMs demonstrate varied therapeutic applications, including symptom relief and contraception.

Purpose of the Study:

  • To review the diverse tissue-specific activities of selective estrogen receptor modulators.
  • To highlight the therapeutic applications and developmental status of various SERMs.
  • To introduce Estetrol (E4) as a novel SERM with unique properties.

Main Methods:

  • Literature review of selective estrogen receptor modulators.
  • Analysis of clinical applications and pharmacological profiles of listed SERMs.
  • Summary of Estetrol (E4) synthesis and approved indications.

Main Results:

  • Tamoxifen and raloxifene are established for breast cancer and osteoporosis.
  • Bazedoxifene/conjugated estrogens combination addresses menopausal symptoms and bone loss with neutral breast effects.
  • Ospemifene treats dyspareunia, and lasofoxifene is under development for breast cancer.
  • Estetrol (E4) exhibits dual weak estrogenic/antiestrogenic properties and is approved for contraception.

Conclusions:

  • Selective estrogen receptor modulators represent a versatile class of drugs with tailored tissue-specific actions.
  • The development of SERMs continues to expand therapeutic options for various conditions.
  • Estetrol (E4) offers a new contraceptive option with a distinct pharmacological profile.