Cited by 495HER2/EGFR in Cancer ResearchLung Cancer Treatments and MutationsBreast Cancer Treatment Studies

Novel mechanism of lapatinib resistance in HER2-positive breast tumor cells: activation of AXL

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Liu, Li, Greger, James, Shi, Hong, Liu, Yuan, Greshock, Joel, Annan, Roland, Halsey, Wendy, Sathe, Ganesh M. +2 more·2009·Cancer Research

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Abstract

HER2-directed therapies, such as trastuzumab and lapatinib, are important treatments for breast cancer. However, some tumors do not respond or develop resistance to these agents. We isolated and characterized multiple lapatinib-resistant, HER2-positive, estrogen receptor (ER)-positive breast cancer clones derived from lapatinib-sensitive BT474 cells by chronic exposure to lapatinib. We show overexpression of AXL as a novel mechanism of acquired resistance to HER2-targeted agents in these models. GSK1363089 (foretinib), a multikinase inhibitor of AXL, MET, and vascular endothelial growth factor receptor currently in phase II clinical trials, restores lapatinib and trastuzumab sensitivity in these resistant cells that exhibit increased AXL expression. Furthermore, small interfering RNA to AXL, estrogen deprivation, or fulvestrant, an ER antagonist, decreases AXL expression and restores sensitivity to lapatinib in these cells. Taken together, these data provide scientific evidence to assess the expression of AXL in HER2-positive, ER-positive patients who have progressed on either lapatinib or trastuzumab and to test the combination of HER2-targeted agents and GSK1363089 in the clinic.

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  1. Matthews DJ. Characterization of EXEL-2880 (XL880), an orally available inhibitor of HGF and VEGF receptor tyrosine kinases. Madrid (Spain): Medicinal Chemistry in Oncology Conference; 2006.

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Authors
Liu, L., Greger, J., Shi, H., Liu, Y., Greshock, J., Annan, R., Halsey, W., Sathe, G. M., Martin, A.-M., & Gilmer, T. M.
Affiliations
  • 1Translational Research and Departments of
  • 3Biomarkers,
  • 4Cancer Metabolism DPU, Cancer Research, and
  • GlaxoSmithKline (United States) (US)
Venue
Cancer Research
Published
2009-08-31
Volume
69
Issue
17
Pages
6871-6878
ISSN
  • 0008-5472 (ISSN-L)
  • 1538-7445
OpenAlex
W2129110050
Cited by
495
References
42
Citations by year
2026: 7 · 2025: 13 · 2024: 12 · 2023: 30 · 2022: 19 · 2021: 30 · 2020: 37 · 2019: 28 · 2018: 29 · 2017: 43 · 2016: 38 · 2015: 46 · 2014: 45 · 2013: 42 · 2012: 28
FWCI
12.48
Type
journal article
Language
en
Open access
Locations
  • Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Oncology › HER2/EGFR in Cancer Research
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Breast Cancer Treatment Studies
Keywords
lapatinib resistance, HER2-positive breast cancer, AXL receptor tyrosine kinase, trastuzumab resistance, acquired drug resistance, foretinib, multikinase inhibitor, estrogen receptor-positive breast cancer, BT474 cells, fulvestrant, estrogen deprivation, combination therapy
MeSH terms
Trastuzumab, Lapatinib, Axl Receptor Tyrosine Kinase, Anilides, Antibodies, Monoclonal, Antineoplastic Agents, Breast Neoplasms, Clone Cells, Drug Antagonism, Female, Humans, Proto-Oncogene Proteins, Quinazolines, Quinolines, Receptors, Estrogen, Oncogene Proteins, Genes, erbB-2, Drug Resistance, Neoplasm, Receptor Protein-Tyrosine Kinases, RNA, Small Interfering, Cell Line, Tumor, Protein Kinase Inhibitors, Antibodies, Monoclonal, Humanized

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