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Tissue selective estrogen complex (TSEC): a review.

James H Pickar1, Matthieu Boucher2, Diana Morgenstern3

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This summary is machine-generated.

Tissue selective estrogen complexes (TSECs) offer a promising approach to menopausal symptom management by combining selective estrogen receptor modulators (SERMs) with estrogens. Careful selection of SERM, doses, and clinical data are crucial for TSEC safety and efficacy.

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Area of Science:

  • Reproductive Endocrinology
  • Pharmacology
  • Gynecology

Background:

  • Selective estrogen receptor modulators (SERMs) exhibit tissue-specific estrogenic/antiestrogenic effects, but no single agent optimally balances these for menopausal symptom treatment.
  • While SERMs can protect against osteoporosis and breast cancer, they may worsen vasomotor symptoms. Estrogens alleviate menopausal symptoms and bone loss, but combined with progestogens, can increase risks.
  • The pursuit of tolerable and effective menopausal therapy led to the development of tissue selective estrogen complexes (TSECs).

Purpose of the Study:

  • To review the historical development of SERMs and TSECs.
  • To discuss the potential for future TSEC development for menopausal symptom management.

Main Methods:

  • This narrative review is based on literature from PubMed.
  • Includes the authors' research and development experience with TSECs.

Main Results:

  • The clinical development of a TSEC (conjugated estrogens/bazedoxifene) highlighted the importance of component selection and dosing for safety and efficacy.
  • Bazedoxifene acts as an estrogen receptor agonist in bone and antagonist in the endometrium, contributing to TSEC success.
  • Other oral TSEC combinations have not shown comparable endometrial safety.

Conclusions:

  • Optimizing TSEC therapy for menopausal symptoms requires careful consideration of SERM choice, dosage, and robust clinical data on safety and efficacy.