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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Effect of ets-related transcription factor (ERT) on transforming growth factor (TGF)-beta type II receptor gene expression in human cancer cell lines.

Transcriptional repression of the TGF-beta type II receptor (RII) is one of the mechanisms leading to TGF-beta resistance. The newly identified epithelium-specific ets transcription factor ERT/ESX/ESE-1 binds to the TGF-beta RII promoter and induces promoter activity. This study aims to investigate the mechanisms underlying development of ERT-mediated TGF-beta resistance using antisense ERT oligonucleotide. We performed Northern blot analysis of TGF-beta RII expression in human colon cancer cell line, RKO, after transfecting these cells with MFG-antisense-ERT retroviral construct. The plasmid containing the chloramphenicol acetyltransferase (CAT) gene alone was used as the control. The amount of TGF-beta RII mRNA appears to be poor in RKO cells expressing antisense ERT compared with both parental RKO and control cells. In conclusion, transfection of MFG-antisense-ERT construct into the colon cancer cell line could result in lower levels of TGF-beta RII mRNA expression, which means that ERT mediates the expression of TGF-beta RII and the transcriptional inhibition of ERT could be a one of the mechanisms of colonic carcinogenesis. More in vitro and in vivo studies should be required to evaluate this treatment in clinical setting.[1]


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