miR-1269 promotes metastasis and forms a positive feedback loop with TGF-β Academic Article uri icon


MeSH Major

  • Colorectal Neoplasms
  • Feedback, Physiological
  • MicroRNAs
  • Neoplasm Recurrence, Local
  • Transforming Growth Factor beta


  • As patient survival drops precipitously from early-stage cancers to late-stage and metastatic cancers, microRNAs that promote relapse and metastasis can serve as prognostic and predictive markers as well as therapeutic targets for chemoprevention. Here we show that miR-1269a promotes colorectal cancer (CRC) metastasis and forms a positive feedback loop with TGF-β signalling. miR-1269a is upregulated in late-stage CRCs, and long-term monitoring of 100 stage II CRC patients revealed that miR-1269a expression in their surgically removed primary tumours is strongly associated with risk of CRC relapse and metastasis. Consistent with clinical observations, miR-1269a significantly increases the ability of CRC cells to invade and metastasize in vivo. TGF-β activates miR-1269 via Sox4, while miR-1269a enhances TGF-β signalling by targeting Smad7 and HOXD10, hence forming a positive feedback loop. Our findings suggest that miR-1269a is a potential marker to inform adjuvant chemotherapy decisions for CRC patients and a potential therapeutic target to deter metastasis.

publication date

  • April 15, 2015



  • Academic Article



  • eng

PubMed Central ID

  • PMC4399006

Digital Object Identifier (DOI)

  • 10.1038/ncomms7879

PubMed ID

  • 25872451

Additional Document Info

start page

  • 6879


  • 6