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Title: Receptor tyrosine kinase EphA5 is a functional molecular target in human lung cancer

Journal Article · · Journal of Biological Chemistry
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  1. Univ. of Mexico School of Medicine, Albuquerque, NM (United States)
  2. Univ. of Texas M. D. Anderson Cancer Center, Houston, TX (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Arrowhead Research Corp., Pasadena, CA (United States)
  5. Harvard Medical School, Boston, MA (United States)

Lung cancer is often refractory to radiotherapy, but molecular mechanisms of tumor resistance remain poorly defined. Here we show that the receptor tyrosine kinase EphA5 is specifically overexpressed in lung cancer and is involved in regulating cellular responses to genotoxic insult. In the absence of EphA5, lung cancer cells displayed a defective G1/S cell cycle checkpoint, were unable to resolve DNA damage, and became radiosensitive. Upon irradiation, EphA5 was transported into the nucleus where it interacted with activated ATM (ataxia-telangiectasia mutated) at sites of DNA repair. In conclusion, we demonstrate that a new monoclonal antibody against human EphA5 sensitized lung cancer cells and human lung cancer xenografts to radiotherapy and significantly prolonged survival, thus suggesting the likelihood of translational applications.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1225738
Report Number(s):
LA-UR-14-27894
Journal Information:
Journal of Biological Chemistry, Vol. 290, Issue 12; ISSN 0021-9258
Publisher:
American Society for Biochemistry and Molecular BiologyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 37 works
Citation information provided by
Web of Science

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Cited By (6)

Synthesis and biological evaluation of phenyl-amino-pyrimidine and indole/oxindole conjugates as potential BCR-ABL inhibitors journal March 2019
Eph receptor signalling: from catalytic to non-catalytic functions journal August 2019
Subendothelial stiffness alters endothelial cell traction force generation while exerting a minimal effect on the transcriptome journal December 2019
EPHA5 mediates trastuzumab resistance in HER2‐positive breast cancers through regulating cancer stem cell‐like properties journal January 2019
Selection of phage-displayed accessible recombinant targeted antibodies (SPARTA): methodology and applications journal May 2018
EphA5 knockdown enhances the invasion and migration ability of esophageal squamous cell carcinoma via epithelial-mesenchymal transition through activating Wnt/β-catenin pathway journal January 2020