Inibi??o da via de sinaliza??o Hedgehog com ciclopamina afeta a express?o de miR-20a e miR-31

摘要

MicroRNAs are small RNA molecules (~ 22 nucleotides) that act as post-transcriptional regulators of gene expression by inhibiting translation of messenger RNAs. MicroRNAs are involved in regulating many biological and pathological processes, as well as the Hedgehog (Hh) signaling pathway. We evaluate the expression of four miRNAs (miR-20a, miR-31, miR-17 and miR-199b5p) in human adipose-derived stem cells under activation and blockade of Hh signaling pathway. Cells were treated with purmorphamine (Hh activator) or cyclopamine (Hh blocker) for 24 hours. RNA extraction and cDNA were performed to analyze of miRNAs expression by quantitative RT-PCR. The expression level of miR-20a and miR-31 increased after blocking Hh signaling pathway, thus these miRNAs may be involved in control of proliferation in stem and cancer cells. MiR-20a and miR-31 are strong candidates for biomarkers of Hh pathway.