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Title: The Panitumumab EGFR Complex Reveals a Binding Mechanism That Overcomes Cetuximab Induced Resistance

Journal Article · · PLoS ONE
ORCiD logo [1];  [2];  [1];  [1];  [1];  [1]
  1. Amgen Inc., Thousand Oaks, CA (United States). Dept. of Therapeutic Discovery
  2. Amgen Inc., Thousand Oaks, CA (United States). Dept. of Metabolic Disorders

Panitumumab and cetuximab target the epidermal growth factor receptor for the treatment of metastatic colorectal cancer. These therapies provide a significant survival benefit to patients with metastatic colorectal cancer with wild-type RAS. A single point mutation in the ectodomain of EGFR (S468R) confers acquired or secondary resistance in cetuximab treated patients, which is not observed in panitumumab-treated patients. Structural and biophysical studies presented here show this mutation directly blocks cetuximab binding to EGFR domain III and describes a unique mechanism by which panitumumab uses a central cavity to accommodate this mutation.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1627803
Journal Information:
PLoS ONE, Vol. 11, Issue 9; ISSN 1932-6203
Publisher:
Public Library of ScienceCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 44 works
Citation information provided by
Web of Science

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Cited By (6)

RAS and BRAF mutations in cell‐free DNA are predictive for outcome of cetuximab monotherapy in patients with tissue‐tested RAS wild‐type advanced colorectal cancer journal September 2019
Targeting EGFR and RAS/RAF Signaling in the Treatment of Metastatic Colorectal Cancer: From Current Treatment Strategies to Future Perspectives journal April 2019
Autophagy inhibitor facilitates gefitinib sensitivity in vitro and in vivo by activating mitochondrial apoptosis in triple negative breast cancer journal May 2017
Distinguishing Features of Cetuximab and Panitumumab in Colorectal Cancer and Other Solid Tumors journal September 2019
Pharmacogenomics of Targeted Agents for Personalization of Colorectal Cancer Treatment journal July 2017
Monoclonal antibody-based molecular imaging strategies and theranostic opportunities journal January 2020

Figures / Tables (5)


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