Dual mechanisms of action of the 5-benzylidene-hydantoin UPR1024 on lung cancer cell lines.

Abstract

In this study, we examined the mechanism of action of the novel epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor 5-benzylidene-hydantoin UPR1024, whose structure was designed to interact at the ATP-binding site of EGFR. The compound had antiproliferative and proapoptotic effects when tested on the non-small cell lung cancer cell line A549. The growth inhibitory effect was associated with an accumulation of the cells in the S phase of the cell cycle. Moreover, UPR1024 induced significant level of DNA strand breaks associated with increased expression of p53 and p21(WAF1) proteins, suggesting an additive mechanism of action. The presence of wild-type p53 improved the drug efficacy, although the effect was also detectable in p53 null cells. We also noted apoptotic cell death after treatment with UPR1024 at concentrations above 10 mumol/L for >24 h, with involvement of both the extrinsic and intrinsic pathways. The present data show that UPR1024 may be considered a combi-molecule capable of both blocking EGFR tyrosine kinase activity and inducing genomic DNA damage. UPR1024 or its derivatives might serve as a basis for development of drugs for the treatment of lung cancer in patients resistant to classic tyrosine kinase inhibitors.

• Authors: Andrea Cavazzoni, Roberta R Alfieri, Caterina Carmi, Valentina Zuliani, Maricla Galetti, Claudia Fumarola, Raffaele Frazzi, Mara Bonelli, Fabrizio Bordi, Alessio Lodola, Marco Mor, Pier Giorgio Petronini
• Journal: Molecular cancer therapeutics (Mol Cancer Ther) Vol. 7 Issue 2 Pg. 361-70 (Feb 2008) ISSN: 1535-7163 [Print] United States
• PMID: 18281519 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Antineoplastic Agents
• Benzylidene Compounds
• Hydantoins
• Quinazolines
• Tumor Suppressor Protein p53
• UPR1024
• 5-benzylhydantoin
• ErbB Receptors
• Gefitinib

Topics

• Antineoplastic Agents (pharmacology)
• Apoptosis (drug effects)
• Benzylidene Compounds (pharmacology)
• Carcinoma, Non-Small-Cell Lung (pathology)
• Cell Line, Tumor
• Cell Proliferation (drug effects)
• DNA Damage (drug effects)
• Drug Evaluation, Preclinical
• Drug Resistance, Neoplasm (drug effects)
• Drug Synergism
• ErbB Receptors (antagonists & inhibitors, metabolism)
• Gefitinib
• Humans
• Hydantoins (pharmacology)
• Lung Neoplasms (pathology)
• Models, Biological
• Phosphorylation
• Quinazolines (pharmacology)
• Tumor Suppressor Protein p53 (metabolism)