We analyzed the presence of a regulation loop like that between MDA-9/Syntenin - NF-κB - RKIP in threeTNBC cell lines (SUM 149, SUM 159 and MDA-MB-231) and in three cell lines of human liver carcinoma(HA22T/VGH, Hep3B and HepG2). Both these cancers are characterized by high aggressive phenotype,poor prognosis and few therapeutic possibilities.Transient transfection was performed with siRNA anti-MDA-9/Syntenin. Expression of different factors wasevaluated by Real time-PCR and Western blotting, while NF-κB activation by TransAM assay. Invasioncapacity was analyzed by Matrigel Invasion Assay.We observed that silencing of MDA-9/Syntenin expression by anti-MDA-9/Syntenin siRNA induced NF-κBdownregulation and contemporary restored expression of an important metastasis suppressor like RKIP in allcancer models; interestingly, RKIP increase in liver cancer models occured only at mRNA levels. Lastly, inour cell models MDA-9/Syntenin downregulation caused a reduction of invasion ability.Our data confirmed the key role of MDA-9/Syntenin in cancer biology and for the first time showed that ispart of a regulation loop among NF-κB and RKIP in TNBC and in liver cancer cell lines. This loop couldconstitute a new potential pharmacological target and provide new therapeutic approaches.
|Numero di pagine||72|
|Stato di pubblicazione||Published - 2018|