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Related Experiment Videos

Tissue distribution of transdermal toremifene

L Soe1, G T Wurz, J U Mäenpää

  • 1Department of Internal Medicine, University of California, Davis, Sacramento 95817, USA.

Cancer Chemotherapy and Pharmacology
|January 1, 1997
PubMed
Summary

Transdermal toremifene achieves high local concentrations in tumors and tissues with minimal systemic distribution. This topical application may offer therapeutic advantages for breast cancer and melanoma treatment while reducing side effects.

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Area of Science:

  • Pharmacology
  • Oncology
  • Dermatology

Background:

  • Toremifene is an antiestrogenic drug used for metastatic breast cancer.
  • Systemic administration can lead to side effects.
  • Local drug delivery aims to maximize therapeutic effects and minimize systemic exposure.

Purpose of the Study:

  • To evaluate the therapeutic potential of transdermal toremifene.
  • To compare local versus systemic concentrations of toremifene after topical application.
  • To assess the efficacy in various animal models.

Main Methods:

  • Kinetic measurements of topically administered toremifene in nude mice, baboons, and a horse.
  • Tumor and tissue concentration analysis following transdermal application.
  • Evaluation of tumor growth inhibition in xenograft models.

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Main Results:

  • Topical toremifene yielded significantly higher tumor concentrations than intraperitoneal administration in mice.
  • Transdermal toremifene demonstrated anti-tumor activity against estrogen receptor-positive breast cancer cells.
  • High local concentrations were observed in breast tissue and melanoma with minimal systemic distribution in baboons and a horse.

Conclusions:

  • Transdermal toremifene achieves high local tissue concentrations.
  • Minimal systemic distribution was observed with topical application.
  • This delivery method holds promise for localized cancer treatment.