Abstract:
:The translation initiation factor eIF4E is an oncogene that is commonly overexpressed in primary breast cancers and metastases. In this article, we report that a pharmacologic inhibitor of eIF4E function, ribavirin, safely and potently suppresses breast tumor formation. Ribavirin administration blocked the growth of primary breast tumors in several murine models and reduced the development of lung metastases in an invasive model. Mechanistically, eIF4E silencing or blockade reduced the invasiveness and metastatic capability of breast cancer cells in a manner associated with decreased activity of matrix metalloproteinase (MMP)-3 and MMP-9. Furthermore, eIF4E silencing or ribavirin treatment suppressed features of epithelial-to-mesenchymal transition, a process crucial for metastasis. Our findings offer a preclinical rationale to explore broadening the clinical evaluation of ribavirin, currently being tested in patients with eIF4E-overexpressing leukemia, as a strategy to treat solid tumors such as metastatic breast cancer.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Pettersson F,Del Rincon SV,Emond A,Huor B,Ngan E,Ng J,Dobocan MC,Siegel PM,Miller WH Jrdoi
10.1158/0008-5472.CAN-14-1996subject
Has Abstractpub_date
2015-03-15 00:00:00pages
1102-12issue
6eissn
0008-5472issn
1538-7445pii
0008-5472.CAN-14-1996journal_volume
75pub_type
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