Breast Cancer Research and Treatment

, Volume 20, Issue 3, pp 155–166 | Cite as

Selecting dose-intense drug combinations: metastatic breast cancer

  • Edward L. Korn
  • Richard Simon
Report

Abstract

A mathematical model previously described is applied to the problem of selecting drug combinations for metastatic breast cancer. The model accounts for the differing single-agent activities of the drugs as well as their differing profiles of toxicity. With no bone marrow protection, combinations with cisplatin offer a small improvement in total equivalent dose over therapy with the more active single-agents. Restricting consideration to the four most commonly used agents, single-agent doxorubicin has the greatest equivalent dose. With protection for leukopenia or willingness to accept a higher incidence of severe leukopenia, a combination with large doses of cyclophosphamide, doxorubicin, and fluorouracil, and a small dose of cisplatin has greatest equivalent dose. The doublets cyclophosphamide/fluorouracil or fluorouracil/cisplatin at higher doses are almost as good. With protection for leukopenia and thrombocytopenia, a cyclophosphamide/thiotepa combination at very high doses maximizes total equivalent dose. This approach can be used to identify regimens worthy of prospective evaluation.

Key words

breast cancer chemotherapy dose intensity mathematical modeling 

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Copyright information

© Kluwer Academic Publishers 1991

Authors and Affiliations

  • Edward L. Korn
    • 1
  • Richard Simon
    • 1
  1. 1.Biometric Research Branch, EPN 739National Cancer InstituteBethesdaUSA

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