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Lapatinib

Tanja Schneider-Merck1, Martin Trepel

  • 1Department of Oncology and Hematology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany. t.schneider-merck@uke.de

Recent Results in Cancer Research. Fortschritte Der Krebsforschung. Progres Dans Les Recherches Sur Le Cancer
|January 15, 2010
PubMed

Insights

Lapatinib, a dual tyrosine kinase inhibitor, shows antitumor activity in advanced HER2-positive breast cancer. It offers an alternative to trastuzumab with fewer cardiac side effects, particularly when combined with capecitabine.

Area of Science:

  • Oncology
  • Pharmacology

Background:

  • The human epidermal growth factor receptor (HER) family is crucial in cancer biology.
  • HER2 overexpression in breast cancer correlates with poor prognosis, necessitating targeted therapies.
  • Trastuzumab is an effective HER2-targeted therapy, but limitations exist.

Purpose of the Study:

  • To evaluate lapatinib, a novel dual tyrosine kinase inhibitor, for HER2-positive breast cancer.
  • To assess lapatinib's efficacy and safety profile, especially its cardiac impact compared to trastuzumab.
  • To explore lapatinib's role in advanced or refractory HER2-positive breast cancer.

Main Methods:

  • Lapatinib inhibits HER1 and HER2 tyrosine kinase activity by blocking ATP binding.
  • Clinical trials assessed lapatinib's antitumor activity, tolerability, and adverse effects.
  • Combination therapy with capecitabine was investigated in patients with progressive disease.

Main Results:

  • Lapatinib demonstrated substantial antitumor activity in advanced HER2-positive breast cancer.
  • The drug is well-tolerated with minimal cardiac adverse effects, unlike trastuzumab.
  • Combination therapy with capecitabine showed efficacy after standard treatments failed.

Conclusions:

  • Lapatinib is a promising therapeutic option for advanced HER2-positive breast cancer.
  • Its favorable safety profile, particularly regarding cardiac function, is advantageous.
  • Further research will investigate lapatinib in adjuvant settings, other combinations, and different cancer types.

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