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Restoration of miR-133a expression inhibits breast cancer cell proliferation, migration and invasion in vitro. SK-BR-3 and MDA-MB-231 cells were transfected with miR-133a mimic or scramble miR mimic as NC group. (A) Real-time PCR was used to examine the miR-133a levels. (B) MTT assay, (C) wound healing assay and (D) Transwell assay were conducted to examine cell proliferation, migration and invasion, respectively. **P<0.01 vs. miR-NC. NC, negative control.
