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Drug delivery systems for oestrogenic hormones and antagonists: the need for selective targeting in

Thibault Ameller1, Philippe Legrand, Véronique Marsaud

  • 1UMR CNRS 8612, Department of Pharmacologie Cellulaire et Moléculaire des Anticancéreux, 5 rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France.

The Journal of Steroid Biochemistry and Molecular Biology
|November 17, 2004
PubMed

Insights

Oestrogens act via ER alpha and ER beta receptors. New biodegradable formulations show promise for targeted delivery of anti-oestrogens in cancer therapy, potentially benefiting other anti-cancer drugs.

Area of Science:

  • Endocrinology and Pharmacology
  • Oncology

Background:

  • Oestrogens exhibit pleiotropic activities mediated by oestrogen receptors (ER alpha and ER beta).
  • The therapeutic applications of oestrogens are influenced by their formulation and delivery methods.
  • Hormone replacement therapy (HRT) with oestrogens carries risks of breast cancer and cardiovascular disease.

Purpose of the Study:

  • To review oestrogen receptor activity and therapeutic applications.
  • To compare different oestrogen formulations for contraception and HRT.
  • To analyze the need for tumor targeting in anti-oestrogen therapy for breast cancer.

Main Methods:

  • Literature review of oestrogen receptor subtypes and their actions.
  • Comparison of oral, intravenous, and transdermal oestrogen formulations.
  • Analysis of clinical trial data on HRT and associated risks.
  • Evaluation of selective oestrogen receptor modulators and pure anti-oestrogens.

Main Results:

  • Different oestrogen formulations have distinct advantages and disadvantages for contraception and HRT.
  • HRT is linked to increased risks of breast cancer and cardiovascular disease.
  • Selective oestrogen receptor modulators do not require tumor targeting, unlike pure anti-oestrogens.

Conclusions:

  • Biodegradable, injectable formulations of anti-oestrogens demonstrate significant anti-tumor efficacy in preclinical models.
  • These novel formulations offer promising new delivery strategies for anti-oestrogens in treating oestrogen-dependent breast cancer.
  • The potential of these delivery systems may extend to other potent anti-cancer agents.

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