Increased cancer stem cell invasion is mediated by myosin IIB and nuclear translocation

被引:20
作者
Thomas, Dustin [1 ,2 ]
Thiagarajan, Praveena S. [1 ]
Rai, Vandana [1 ]
Reizes, Ofer [1 ,2 ]
Lathia, Justin [1 ,2 ]
Egelhoff, Thomas [1 ,2 ]
机构
[1] Cleveland Clin, Lerner Res Inst, Dept Cellular & Mol Med, Cleveland, OH 44106 USA
[2] Case Western Reserve Univ, Cleveland Clin, Lerner Coll Med, Dept Mol Med, Cleveland, OH 44106 USA
关键词
cancer stem cell; myosin IIB; nuclear translocation; invasion; breast cancer; NEGATIVE BREAST-CANCER; BRAIN;
D O I
10.18632/oncotarget.9896
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Despite many advances in the treatment of breast cancer, it remains one of the leading causes of death among women. One hurdle for effective therapy is the treatment of the highly invasive and tumorigenic subpopulation of tumors called cancer stem cells (CSCs). CSCs, when stimulated with EGF, migrate through a physiological 3D collagen matrix at a higher velocity than non-stem cancer cells (non-SCCs). This increased invasion is due, in part, by an enhanced nuclear translocation ability of CSCs. We observed no difference between CSC and non-SCC in cellular migration rates on a 2D surface. Furthermore, during transwell migration using large diameter transwell pores, both CSC and non-SCC populations migrated with similar efficiency. However, when challenged with more restrictive transwells, CSCs were dramatically more capable of transwell migration. These results implicate nuclear translocation as a major rate limiting factor for CSC dissemination. We further show that non-muscle myosin IIB is critical for this enhanced nuclear translocation and the ability for cancer stem cells to efficiently migrate through restrictive 3D environments. These studies suggest that cytoskeletal elements upregulated in CSCs, such as myosin IIB, may be valuable targets for intervention in cancer stem cell dispersal from tumors.
引用
收藏
页码:47586 / 47592
页数:7
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