Document Detail


Lapatinib acts on gastric cancer through both antiproliferative function and augmentation of trastuzumab-mediated antibody-dependent cellular cytotoxicity.
MedLine Citation:
PMID:  23187882     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Trastuzumab has been recently approved for clinical use to treat HER2-expressing advanced gastric cancer, and anti-HER2-targeting therapy has become a promising option for gastric cancer. Lapatinib is a dual tyrosine kinase inhibitor targeting EGFR and HER2. The aim of the present study was to explore the utility of lapatinib for gastric cancer, with a particular focus on trastuzumab-mediated antibody-dependent cellular cytotoxicity (ADCC). METHODS: Nine gastric cancer cell lines were evaluated for the effects of lapatinib on the cell-surface accumulation of HER2 and analyzed for their additional effects on trastuzumab-mediated ADCC. Also, HER2 signaling with Western blot, proliferative function with the MTT assay, and apoptosis-inducing activity with 7ADD/Annexin-V were investigated when a panel of gastric cancer cell lines was treated with lapatinib. RESULTS: Lapatinib inhibited HER2 signaling and cell proliferation in the panel of gastric cancer cell lines. Lapatinib also induced the accumulation of HER2 on the cell surface, resulting in the enhancement of trastuzumab-mediated ADCC of gastric cancer. CONCLUSIONS: Lapatinib exhibits inhibitory activity in gastric cancer cells, and the combination of lapatinib with trastuzumab may be a promising treatment strategy for gastric cancer patients.
Authors:
Kensuke Shiraishi; Kousaku Mimura; Shinichiro Izawa; Ayako Inoue; Shugo Shiba; Takanori Maruyama; Mitsuaki Watanabe; Yoshihiko Kawaguchi; Masayuki Inoue; Hideki Fujii; Koji Kono
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-28
Journal Detail:
Title:  Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association     Volume:  -     ISSN:  1436-3291     ISO Abbreviation:  Gastric Cancer     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100886238     Medline TA:  Gastric Cancer     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
First Department of Surgery, University of Yamanashi, Yamanashi, Japan.
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