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Restoration of miR-133a expression inhibits breast cancer cell growth in vivo. MDA-MB-231 cells stably transfected with miR-133a or miR-NC lentiviral plasmid were then subcutaneously implanted into nude mice. (A) After implantation for 60 days, the animals were sacrificed. (B) The weight and (C) volume of tumor tissues were examined. **P<0.01 vs. NC. NC, negative control.
