MicroRNA-203 Suppresses Cell Proliferation and Migration by Targeting BIRC5 and LASP1 in Human Triple-Negative Breast Cancer Cells

J Exp Clin Cancer Res. 2012 Jun 19;31(1):58. doi: 10.1186/1756-9966-31-58.


Background: This study was performed to investigate the effect of microRNA-203 (miR-203) on cell proliferation and migration in triple-negative breast cancer (TNBC).

Methods: Real-time PCR was performed to detect the expression of miR-203 in TNBC cell lines. miR-203 precursor and control microRNA (miRNA) were transfected into triple-negative breast cancer (TNBC) cell lines and the effects of miR-203 up-regulation on the proliferation and migration of cells were investigated. Meanwhile, the mRNA and protein levels of baculoviral IAP repeat-containing protein 5 (BIRC5) and Lim and SH3 domain protein 1 (LASP1) were measured. Luciferase assays were also performed to validate BIRC5 and LASP1 as miR-203 targets.

Results: Both miR-203 and BIRC5 siRNA signicantly inhibited cell proliferation in TNBC cells. Both miR-203 and LASP1 siRNA signicantly inhibited cell migration in TNBC cells, also. Moreover, up-regulated of BIRC5 and LASP1 was able to abrogate the effects induced by transfection with the miR-203 precursor.

Conclusions: These data suggest that miR-203 may function as a tumor suppressor in TNBC cells. Thus, miR-203 could be a potential therapeutic target for this disease.

MeSH terms

  • Adaptor Proteins, Signal Transducing / biosynthesis
  • Adaptor Proteins, Signal Transducing / genetics*
  • Adaptor Proteins, Signal Transducing / metabolism
  • Breast Neoplasms / genetics*
  • Breast Neoplasms / metabolism
  • Breast Neoplasms / pathology
  • Cell Growth Processes / genetics
  • Cell Line, Tumor
  • Cell Movement / genetics*
  • Cytoskeletal Proteins / biosynthesis
  • Cytoskeletal Proteins / genetics*
  • Cytoskeletal Proteins / metabolism
  • Down-Regulation
  • Female
  • Gene Expression Regulation, Neoplastic
  • Humans
  • Inhibitor of Apoptosis Proteins / biosynthesis
  • Inhibitor of Apoptosis Proteins / genetics*
  • Inhibitor of Apoptosis Proteins / metabolism
  • LIM Domain Proteins / biosynthesis
  • LIM Domain Proteins / genetics*
  • LIM Domain Proteins / metabolism
  • MicroRNAs / biosynthesis
  • MicroRNAs / genetics*
  • MicroRNAs / metabolism
  • RNA, Messenger / genetics
  • RNA, Messenger / metabolism
  • RNA, Small Interfering / administration & dosage
  • RNA, Small Interfering / genetics
  • Receptor, ErbB-2 / metabolism
  • Receptors, Estrogen / metabolism
  • Receptors, Progesterone / metabolism
  • Survivin
  • Transfection


  • Adaptor Proteins, Signal Transducing
  • BIRC5 protein, human
  • Cytoskeletal Proteins
  • Inhibitor of Apoptosis Proteins
  • LASP1 protein, human
  • LIM Domain Proteins
  • MIRN203 microRNA, human
  • MicroRNAs
  • RNA, Messenger
  • RNA, Small Interfering
  • Receptors, Estrogen
  • Receptors, Progesterone
  • Survivin
  • Receptor, ErbB-2