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Impact of hormone receptor status on the efficacy of HER2-targeted treatment

Bin Zhao1, Hong Zhao2, Jiaxin Zhao1,3

  • 1The Second Affiliated Hospital & Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, China.

Endocrine-Related Cancer
|May 10, 2018
PubMed

Insights

Hormone receptor (HR) status significantly impacts HER2-targeted therapy effectiveness in breast cancer. HR-negative patients benefit more in neoadjuvant settings, while HR-positive patients show greater advantages in adjuvant settings.

Area of Science:

  • Oncology
  • Clinical Trials
  • Pharmacology

Background:

  • Human epidermal growth factor receptor 2 (HER2)-targeted therapies have transformed HER2-positive breast cancer (BC) treatment.
  • The influence of hormone receptor (HR) status on the efficacy of these therapies remains incompletely understood.

Purpose of the Study:

  • To conduct a meta-analysis of randomized controlled trials (RCTs) evaluating the association between HR status and the efficacy of HER2-targeted therapy.
  • To investigate this association in both neoadjuvant and adjuvant treatment settings for HER2-positive breast cancer.

Main Methods:

  • A systematic literature search of PubMed and EMBASE was performed for RCTs published up to October 2017.
  • Studies included patients receiving HER2-targeted agents such as trastuzumab, lapatinib, pertuzumab, trastuzumab emtansine, and neratinib.
  • Efficacy endpoints analyzed were pathological complete response (pCR) for neoadjuvant therapy and disease-free survival (DFS) for adjuvant therapy.

Main Results:

  • In the neoadjuvant setting (7 trials, 2868 subjects), HR-negative patients showed significantly greater pCR rates with HER2-targeted agents compared to HR-positive patients (OR, 2.34).
  • In the adjuvant setting (7 studies, 12,768 patients), HR-positive patients demonstrated improved DFS with anti-HER2 treatment compared to HR-negative patients (OR, 0.81).
  • The effect of HR status on pCR was independent of the specific anti-HER2 agent used.

Conclusions:

  • HER2-targeted therapy efficacy varies based on HR status, with different benefits observed in neoadjuvant versus adjuvant settings.
  • HR-negative patients may derive greater benefit from neoadjuvant HER2-targeted therapy, whereas HR-positive patients show more advantage in adjuvant settings.
  • Understanding the interplay between HR status and HER2-targeted treatment is crucial for optimizing breast cancer management.
Keywords:
cancerdisease-free survivalhormone receptorhuman epidermal growth factor receptor 2pathological complete response

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