Abstract:
PURPOSE:Inflammatory breast cancer (IBC) is arguably the deadliest form of breast cancer due to its rapid onset and highly invasive nature. IBC carries 5- and 10-year disease-free survival rates of ~45% and <20%, respectively. Multiple studies demonstrate that in comparison with conventional breast cancer, IBC has a unique molecular identity. Here, we have identified platelet-derived growth factor receptor alpha (PDGFRA) as being uniquely expressed and active in IBC patient tumor cells. EXPERIMENTAL DESIGN:Here we focus on characterizing and targeting PDGFRA in IBC. Using gene expression, we analyzed IBC patient samples and compared them with non-IBC patient samples. Further, using IBC cells in culture, we determined the effect of small molecules inhibitors in both in vitro and in vivo assays. RESULTS:In IBC patients, we show more frequent PDGFRA activation signature than non-IBC samples. In addition, the PDGFRA activation signature is associated with shorter metastasis-free survival in both uni- and multivariate analyses. We also demonstrate that IBC cells express active PDGFRA. Finally, we show that PDGFRA targeting by crenolanib (CP-868-596), but not imatinib (STI571), two small molecule inhibitors, interferes with IBC cell growth and emboli formation in vitro and tumor growth in vivo. CONCLUSIONS:Our data suggest that PDGFRA may be a promising target for therapy in IBC.
journal_name
Neoplasiajournal_title
Neoplasia (New York, N.Y.)authors
Joglekar-Javadekar M,Van Laere S,Bourne M,Moalwi M,Finetti P,Vermeulen PB,Birnbaum D,Dirix LY,Ueno N,Carter M,Rains J,Ramachandran A,Bertucci F,van Golen KLdoi
10.1016/j.neo.2017.03.002subject
Has Abstractpub_date
2017-07-01 00:00:00pages
564-573issue
7eissn
1522-8002issn
1476-5586pii
S1476-5586(16)30329-3journal_volume
19pub_type
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