Document Detail

XRP6258-induced gene expression patterns in head and neck cancer carcinoma.
MedLine Citation:
PMID:  20513026     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES/HYPOTHESIS: XRP6258 is a novel taxoid, which has antitumor activity in preclinical mouse orthotopic and human xenograft cancer models. However, limited XRP6258 studies have been performed in head and neck squamous cell carcinoma cells (HNSCC). The objective of this study is to identify the antitumor activity of XRP6258 in HNSCC cell line models.
METHODS: HNSCC cells (HN30 and HN12) were exposed to either XRP6258 or docetaxel. XRP6258-induced growth suppression, cell cycle arrest and apoptosis were measured. Further, XRP6258-induced expression patterns of selected genes were compared to docetaxel-induced expression patterns using Western blot analysis.
RESULTS: XRP6258 suppressed proliferation and induced G(2)M arrest and apoptosis in both of the cell lines tested. XRP6258 and docetaxel produced similar alteration in the expression of cell cycle regulators, such as cyclin A and cyclin B1. The expression of E2F and EGFR were decreased in both XRP6258 and docetaxel-treated HNSCC cells. Finally, XRP6258 induced a greater level of bcl2 phosphorylation than docetaxel in HN12 cell line.
CONCLUSIONS: XRP6258 appeared to have a similar mechanism of action as docetaxel in the two HNSCC cell lines studied. XRP6258 induced cell cycle arrest, growth suppression, and apoptosis by altering gene expression patterns similar to that induced by docetaxel. These preclinical experiments suggest that XRP6258 may be useful in treating HNSCC, and the aforementioned genes can potentially be used as surrogate endpoint biomarkers.
George H Yoo; Zyed Kafri; John F Ensley; Fulvio Lonardo; Harold Kim; Adam J Folbe; Joshua Won; Timothy Stevens; Ho-Sheng Lin
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Laryngoscope     Volume:  120     ISSN:  1531-4995     ISO Abbreviation:  Laryngoscope     Publication Date:  2010 Jun 
Date Detail:
Created Date:  2010-05-31     Completed Date:  2010-07-15     Revised Date:  2013-05-28    
Medline Journal Info:
Nlm Unique ID:  8607378     Medline TA:  Laryngoscope     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1114-9     Citation Subset:  IM    
Department of Otolaryngology-Head and Neck Surgery, John D. Dingell VA Medical Center, Detroit, Michigan, USA.
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MeSH Terms
Annexin A5 / metabolism
Apoptosis / drug effects,  genetics
Blotting, Western
Carcinoma, Squamous Cell / drug therapy*,  genetics
Cell Cycle / drug effects,  genetics
Cell Line, Tumor
Cyclin A / metabolism
Cyclin B1 / metabolism
Gene Expression Profiling
Gene Expression Regulation, Neoplastic / drug effects*
Head and Neck Neoplasms / drug therapy*,  genetics
Taxoids / pharmacology*
Tumor Cells, Cultured
Reg. No./Substance:
0/Annexin A5; 0/Cyclin A; 0/Cyclin B1; 0/Taxoids; 0/XRP6258; 15H5577CQD/docetaxel

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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