TRAF4 is thus required for efficient TGFβ-induced migration, EMT and breast cancer metastasis in a USP15-regulated fashion [ 33].
This reiterates the importance of IGF-1 mediated protease activation, and the downstream consequences of increased IGF-1 signaling in cell migration, invasion, and breast cancer.
Taken together, these findings indicate that Hsp90α and Hsp70 assist in MMP-2 activation, which increases breast cancer cell migration and contributes to breast cancer invasion.
The emerging view is that, in breast cancer, WNT5A has a suppressive effect, inhibiting migration and invasion of breast cancer cell lines [24].
In particular, they showed that C4PY elicits an inhibitory action on GPER-activated signaling, including the repression of both ERK and Akt phosphorylation, gene transcription, cell proliferation and migration in breast cancer cells and in CAFs.
Because miR-33a expression was inversely correlated with the metastatic abilities of breast cancer cell lines, the effects of miR-33a on the migration and invasion of breast cancer cells were further examined by Transwell assays.
In in vitro settings, ERβ inhibits proliferation, migration and invasion of breast cancers cells [ 4- 9] as well as the growth of breast tumor xenografts [ 10].
Activation of another tyrosine kinase, c-Src, by the CD44 HA complex stimulates a rearrangement of cytoskeleton proteins and increases migration in breast and ovarian cancers [ 18, 19, 25].
These results have been also supported by in vitro experiments that proved the efficacy of CXCR4 inhibitors in blocking SDF-1/CXCR4-mediated proliferation and migration in breast cancer and lymphoblastic leukaemia [ 19, 45].
These results demonstrate that miR-33a can inhibit the proliferation, migration, and invasion of breast cancer cells in vitro.
