Biomonitoring of urinary tamoxifen and its metabolites from breast cancer patients using nonaqueous capillary electrophoresis with electrospray mass spectrometry. Academic Article uri icon

Overview

abstract

  • Tamoxifen is an antiestrogen drug used to treat breast cancer. We have extracted tamoxifen and several of its metabolites from urine of patients with both metastatic (stage IV) and locally confined (stages I, II, and III) breast cancer. Analysis of these metabolites was performed by nonaqueous capillary electrophoresis with electrospray-mass spectrometry. Peak heights from extracted ion current electropherograms of the metabolites were used to establish a metabolic profile for each patient. We demonstrate substantial variation among patient profiles, statistically significant differences in the amount of urinary tamoxifen N-oxide found in stages I, II, and III compared to stage IV breast cancer patients, and statistically significant differences in the amount of 3,4-dihydroxytamoxifen found in progressors compared to nonprogressors with metastatic (stage IV) cancer.

publication date

  • August 1, 2001

Research

keywords

  • Antineoplastic Agents, Hormonal
  • Breast Neoplasms
  • Carcinoma, Ductal, Breast
  • Electrophoresis, Capillary
  • Estrogen Antagonists
  • Spectrometry, Mass, Electrospray Ionization
  • Tamoxifen

Identity

Scopus Document Identifier

  • 0034850789

Digital Object Identifier (DOI)

  • 10.1002/1522-2683(200108)22:13<2730::AID-ELPS2730>3.0.CO;2-3

PubMed ID

  • 11545399

Additional Document Info

volume

  • 22

issue

  • 13