Abstract:
:While epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors improve the prognosis of patients with EGFR mutant lung cancer, the prognosis of patients with nonmutant EGFR lung cancer, especially those with metastases, is still extremely poor. We have assessed the therapeutic efficacy of E7080, an orally available inhibitor of multiple tyrosine kinases including VEGF receptor 2 (VEGFR-2) and VEGFR-3, in experimental multiple organ metastasis of lung cancer cell lines without EGFR mutations. E7080 markedly inhibited the in vitro proliferation of VEGF-stimulated microvascular endothelial cells. Intravenous inoculation into natural killer cell-depleted severe combined immunodeficient mice of the small cell lung cancer cell lines H1048 (producing low amounts of VEGF) and SBC-5 (producing intermediate amounts of VEGF) resulted in hematogenous metastases into multiple organs, including the liver, lungs, kidneys, and bones, whereas intravenous inoculation of PC14PE6, a non-small cell lung cancer cell line producing high amounts of VEGF, resulted in lung metastases followed by massive pleural effusion. Daily treatment with E7080 started after the establishment of micrometastases significantly reduced the number of large (>2 mm) metastatic nodules and the amount of pleural effusion, and prolonged mouse survival. Histologically, E7080 treatment reduced the numbers of endothelial and lymph endothelial cells and proliferating tumor cells and increased the number of apoptotic cells in metastatic nodules. These results suggest that E7080 has antiangiogenic and antilymphangiogenic activity and may be of potential therapeutic value in patients with nonmutant EGFR lung cancer and multiple organ metastases.
journal_name
Mol Cancer Therjournal_title
Molecular cancer therapeuticsauthors
Ogino H,Hanibuchi M,Kakiuchi S,Trung VT,Goto H,Ikuta K,Yamada T,Uehara H,Tsuruoka A,Uenaka T,Wang W,Li Q,Takeuchi S,Yano S,Nishioka Y,Sone Sdoi
10.1158/1535-7163.MCT-10-0707subject
Has Abstractpub_date
2011-07-01 00:00:00pages
1218-28issue
7eissn
1535-7163issn
1538-8514pii
1535-7163.MCT-10-0707journal_volume
10pub_type
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