Publication date: 25 July 2016
Source:Gene, Volume 586, Issue 2
Author(s): Meisam Jafarzadeh, Bahram M. Soltani, Sadat Dokanehiifard, Maryam Kay, Nasser Aghdami, Saman Hosseinkhani
The SMAD family comprises of transcription factors that function as signal transducers of transforming growth factor (TGFβ) superfamily members. MiRNAs are a class of small noncoding RNAs that may play a major role in post transcriptional regulation of SMAD genes. Here, we intended to investigate if hsa-miR-497-5p is capable of regulating SMAD3 gene expression. Hsa-miR-497-5p was bioinformatically predicted as a candidate regulator of SMAD3 gene expression and then, hsa-miR-497-5p expression status was analyzed in different cell lines using RT-qPCR. Overexpression of hsa-miR-497-5p in HEK293t cells resulted in downregulation of SMAD3 which was detected by RT-qPCR and western analysis. Further, dual luciferase assay results supported direct interaction of hsa-miR-497-5p with 3′-UTR sequences of SMAD3 transcript. Overexpression of hsa-miR-497-5p in HEK293t cells resulted in cell cycle arrest in G0/G1 phase, detected by flow cytometry. Overall, accumulative results indicated that hsa-miR-497-5p by targeting SMAD3 is potentially one of the regulators of the TGFβ signaling pathway.
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