Journal
MACROMOLECULAR BIOSCIENCE
Volume 17, Issue 6, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mabi.201600430
Keywords
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Funding
- Canadian Breast Cancer Foundation (CBCF)
- Natural Sciences and Engineering Council of Canada (NSERC)
- University of Alberta Office of Research
- Alberta Innovates [201400342] Funding Source: researchfish
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Cell surface integrins, which play important roles in the survival, proliferation, migration, and invasion of cancer cells, are a viable target for treatment of metastatic breast cancer. This line of therapy still remains challenging due to the lack of proper identification and validation of effective targets as well as the lack of suitable therapeutic agents for treatment. The focus is on one such molecular target for this purpose, namely integrin-beta 1, and effective lowering of integrin-beta 1 levels on a breast cancer model (MDA-MB-231 cells) is achieved by delivering a dicer-substrate short interfering RNA (siRNA) targeting integrin-beta 1 with lipid-modified low molecular weight polyethylenimine polymers. Reduction of integrin-beta 1 levels leads to reduced adhesion of MDA-MB-231 cells to extracellular matrix component fibronectin as well as to human bone marrow cells. A reduced migration of the breast cancer cells is also observed after integrin-beta 1 silencing in scratch and transwell migration assays. These results highlight the importance of integrin-beta 1 for the migration of metastatic breast cancer cells by effectively silencing this target with a practical dose of siRNA.
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