HER2-Positive Metastatic Breast Cancer: Available Treatments and Current Developments

Ismail Essadi1, Zineb Benbrahim2, Mohamed Kaakoua1

  • 1Medical Oncology, Ibn Sina Military Hospital, Faculty of Medicine, Cadi Ayyad University, Marrakesh 40080, Morocco.

Cancers
|March 29, 2023
PubMed

Insights

New treatments like trastuzumab-deruxtecan offer hope for HER2-positive metastatic breast cancer (MBC). Research is ongoing to clarify their effectiveness, especially for brain metastases, and to integrate new therapies like tucatinib.

Area of Science:

  • Oncology
  • Medical Research

Background:

  • HER2 receptor overexpression in breast cancer is linked to poor prognosis and brain metastases.
  • Current standards for HER2-positive metastatic breast cancer (MBC) include anti-HER2 double blockade, taxane, and trastuzumab emtansine (T-DM1).
  • Newer agents like trastuzumab-deruxtecan have shown improved survival, becoming a new standard of care.

Purpose of the Study:

  • To review established and novel anti-HER2 therapies for HER2-positive MBC.
  • To discuss the efficacy of current treatments, including antibody-drug conjugates, in patients with brain metastases.
  • To explore optimal integration of anti-HER2 therapies in first and later-line settings.

Main Methods:

  • Literature review of established drugs and novel agents for HER2-positive MBC.
  • Analysis of clinical data regarding treatment outcomes, particularly for patients with brain metastases.
  • Discussion of therapeutic strategies and treatment sequencing.

Main Results:

  • Trastuzumab-deruxtecan has demonstrated improved overall survival in second-line treatment for HER2-positive MBC.
  • The benefit of antibody-drug conjugates, including trastuzumab-deruxtecan, in patients with brain metastases requires further clarification.
  • Tucatinib, a novel tyrosine kinase inhibitor, shows promise for treating patients with brain metastases.

Conclusions:

  • Established and novel anti-HER2 therapies are evolving for HER2-positive MBC.
  • Further research is needed to establish the role of new agents in patients with brain metastases.
  • Personalized treatment strategies are crucial for optimizing outcomes in HER2-positive MBC.

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