Tumor Biology

, Volume 35, Issue 7, pp 6245–6253 | Cite as

Restoring TGFβ1 pathway-related microRNAs: possible impact in metastatic prostate cancer development

  • Juliana Inês Santos
  • Ana Luísa Teixeira
  • Francisca Dias
  • Mónica Gomes
  • Augusto Nogueira
  • Joana Assis
  • Rui Medeiros


In developed countries, prostate cancer (PC) is the neoplasia more frequently diagnosed in men. The signaling pathway induced by the transforming growth factor β1 (TGFβ1) has an important role in cell growth, differentiation, and development, the downregulation of this pathway being associated with cancer development. In PC, the activation of this signaling pathway is lost, resulting in favoring of tumor growth, proliferation, and evasion of apoptosis. Several studies have shown that microRNAs (miRNAs), small non-coding RNA, are closely associated with the development, invasion, and metastasis, suggesting that they have a critical role in cancer development. Recently, Smad proteins, the signal transducers of the TGFβ1 signaling pathway, were found to regulate miRNA expression, through both transcriptional and posttranscriptional mechanisms. In this review, we summarize the mechanisms underlying Smad-mediated regulation of miRNA biogenesis and the effects on cancer development, particularly in PC. We identify that TGFβ1-related miR-143, miR-145, miR-146a, and miR-199a may have a key role in the development of prostate cancer metastasis and the restoration of their expression may be a promising therapeutic strategy for PC treatment.


Prostate cancer TGFβ1 MicroRNAs Smad proteins 



We would like to thank the Liga Portuguesa Contra o Cancro-Centro Regional do Norte (Portuguese League Against Cancer) and FCT-Fundação para a Ciência e Tecnologia. ALT is a doctoral degree grant holder from FCT (SFRH/BD/47381/2008).

Conflicts of interest



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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2014

Authors and Affiliations

  • Juliana Inês Santos
    • 1
    • 2
  • Ana Luísa Teixeira
    • 1
    • 2
  • Francisca Dias
    • 1
    • 2
  • Mónica Gomes
    • 1
    • 2
    • 3
  • Augusto Nogueira
    • 1
    • 3
  • Joana Assis
    • 1
    • 3
  • Rui Medeiros
    • 1
    • 2
    • 3
    • 4
  1. 1.Molecular Oncology GroupPortuguese Institute of Oncology of PortoPortoPortugal
  2. 2.Abel Salazar Institute for the Biomedical Sciences (ICBAS)University of PortoPortoPortugal
  3. 3.Research DepartmentLPCC-Portuguese League Against Cancer (NRNorte)PortoPortugal
  4. 4.CEBIMED, Faculty of Health SciencesFernando Pessoa UniversityPortoPortugal

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