Abstract:
:In ovarian cancer, loss of BRCA gene expression in tumors is associated with improved response to chemotherapy and increased survival. A means to pharmacologically downregulate BRCA gene expression could improve the outcomes of patients with BRCA wild-type tumors. We report that vascular endothelial growth factor receptor 3 (VEGFR3) inhibition in ovarian cancer cells is associated with decreased levels of both BRCA1 and BRCA2. Inhibition of VEGFR3 in ovarian tumor cells was associated with growth arrest. CD133(+) ovarian cancer stemlike cells were preferentially susceptible to VEGFR3-mediated growth inhibition. VEGFR3 inhibition-mediated down-regulation of BRCA gene expression reversed chemotherapy resistance and restored chemosensitivity in resistant cell lines in which a BRCA2 mutation had reverted to wild type. Finally, we demonstrate that tumor-associated macrophages are a primary source of VEGF-C in the tumor microenvironment. Our studies suggest that VEGFR3 inhibition may be a pharmacologic means to downregulate BRCA genes and improve the outcomes of patients with BRCA wild-type tumors.
journal_name
Neoplasiajournal_title
Neoplasia (New York, N.Y.)authors
Lim JJ,Yang K,Taylor-Harding B,Wiedemeyer WR,Buckanovich RJdoi
10.1016/j.neo.2014.04.003subject
Has Abstractpub_date
2014-04-01 00:00:00pages
343-53.e1-2issue
4eissn
1522-8002issn
1476-5586pii
S1476-5586(14)00042-6journal_volume
16pub_type
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