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- Title
Expression of the neoplastic phenotype by human thyroid carcinoma cell lines requires NFκB p65 protein expression.
- Authors
Visconti, Roberta; Cerutti, Janete; Battista, Sabrina; Fedele, Monica; Trapasso, Francesco; Zeki, Kazuya; Miano, Maria Pia; de Nigris, Filomena; Casalino, Laura; Curcio, Francesco; Santoro, Massimo; Fusco, Alfredo
- Abstract
We have investigated the role of the NFκB complex in the process of thyroid carcinogenesis by analysing thyroid carcinoma cell lines. A significant increase in p65 NFκB mRNA and protein expression, compared to normal thyroid cultures or tissue, was found in all of the cancer cell lines. Conversely, only a modest increase in the p50 NFκB mRNA and protein was found in most, but not all carcinoma cell lines. The block of p65 protein synthesis with specific antisense oligonucleotides greatly reduced the ability of two undifferentiated carcinoma cell lines to form colonies in agar and reduced their growth rate. On the other hand, no effect was observed in the same cell lines when treated with p50 specific antisense oligonucleotides. These inhibitory effects seem to be mediated by the suppression of c-myc gene expression, since treatment with antisense oligonucleotides for p65 gene interfered negatively with c-myc gene expression. Our results indicate that activation of the NFκB complex by overexpression of p65 plays a critical role in the process of thyroid cell transformation.
- Subjects
THYROID cancer; CANCER cells; PHENOTYPES; GENE expression; TUMOR suppressor genes
- Publication
Oncogene, 1997, Vol 15, Issue 16, p1987
- ISSN
0950-9232
- Publication type
Article
- DOI
10.1038/sj.onc.1201373