Sorafenib in locally advanced or metastatic breast cancer

William J Gradishar1

  • 1Maggie Daley Center for Women's Cancer Care, Northwestern University Feinberg School of Medicine, Northwestern Memorial Hospital, Robert H. Lurie Comprehensive Cancer Center, 676 N St Clair St, Suite 850, Chicago, IL 60611, USA. WGradishar@nmff.org

Abstract

Insights

Sorafenib shows varied efficacy in advanced HER2-negative breast cancer (BC) when combined with chemotherapy. Further Phase III trials are needed to confirm its role in specific patient populations and treatment regimens.

Area of Science:

  • Oncology
  • Medical Oncology
  • Clinical Trials

Background:

  • Sorafenib is an oral multikinase inhibitor with anti-angiogenic and anti-proliferative properties.
  • Currently approved for hepatocellular and renal cell carcinomas, sorafenib is under investigation for other solid tumors, including breast cancer (BC).

Purpose of the Study:

  • To investigate the efficacy of sorafenib when added to select chemotherapies for patients with HER2-negative advanced breast cancer.
  • To evaluate the impact of sorafenib on progression-free survival (PFS) in this patient population.

Main Methods:

  • Four randomized, double-blind, placebo-controlled Phase IIb screening trials (TIES) were conducted.
  • Sorafenib was administered in combination with various chemotherapies (capecitabine, gemcitabine, paclitaxel, docetaxel, letrozole).
  • Primary endpoint for all trials was progression-free survival (PFS).

Main Results:

  • SOLTI-0701 showed significant PFS benefit with sorafenib plus capecitabine (first- or second-line).
  • AC01B07 reported a modest PFS benefit with sorafenib plus gemcitabine or capecitabine after bevacizumab progression.
  • NU07B1 and FM-B07-01 trials did not show significant PFS improvement with sorafenib combined with paclitaxel, docetaxel, or letrozole.

Conclusions:

  • Phase IIb data suggest a potential role for sorafenib in combination with specific chemotherapies for HER2-negative advanced BC.
  • Variability in results may be attributed to the chemotherapy combination used or specific patient populations.
  • Phase III confirmatory trials are essential to validate these findings and establish sorafenib's role in advanced breast cancer treatment.

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