| RRC ID |
65747
|
| 著者 |
Vasilaki E, Morikawa M, Koinuma D, Mizutani A, Hirano Y, Ehata S, Sundqvist A, Kawasaki N, Cedervall J, Olsson AK, Aburatani H, Moustakas A, Miyazono K, Heldin CH.
|
| タイトル |
Ras and TGF-β signaling enhance cancer progression by promoting the ΔNp63 transcriptional program.
|
| ジャーナル |
Sci Signal
|
| Abstract |
The p53 family of transcription factors includes p63, which is a master regulator of gene expression in epithelial cells. Determining whether p63 is tumor-suppressive or tumorigenic is complicated by isoform-specific and cellular context-dependent protein associations, as well as antagonism from mutant p53. ΔNp63 is an amino-terminal-truncated isoform, that is, the predominant isoform expressed in cancer cells of epithelial origin. In HaCaT keratinocytes, which have mutant p53 and ΔNp63, we found that mutant p53 antagonized ΔNp63 transcriptional activity but that activation of Ras or transforming growth factor-β (TGF-β) signaling pathways reduced the abundance of mutant p53 and strengthened target gene binding and activity of ΔNp63. Among the products of ΔNp63-induced genes was dual-specificity phosphatase 6 (DUSP6), which promoted the degradation of mutant p53, likely by dephosphorylating p53. Knocking down all forms of p63 or DUSP6 and DUSP7 (DUSP6/7) inhibited the basal or TGF-β-induced or epidermal growth factor (which activates Ras)-induced migration and invasion in cultures of p53-mutant breast cancer and squamous skin cancer cells. Alternatively, overexpressing ΔNp63 in the breast cancer cells increased their capacity to colonize various tissues upon intracardiac injection in mice, and this was inhibited by knocking down DUSP6/7 in these ΔNp63-overexpressing cells. High abundance of ΔNp63 in various tumors correlated with poor prognosis in patients, and this correlation was stronger in patients whose tumors also had a mutation in the gene encoding p53. Thus, oncogenic Ras and TGF-β signaling stimulate cancer progression through activation of the ΔNp63 transcriptional program.
|
| 巻・号 |
9(442)
|
| ページ |
ra84
|
| 公開日 |
2016-8-23
|
| DOI |
10.1126/scisignal.aag3232
|
| PII |
9/442/ra84
|
| PMID |
27555661
|
| MeSH |
Breast Neoplasms / genetics
Breast Neoplasms / metabolism*
Breast Neoplasms / pathology
Cell Line, Transformed
Cell Movement*
Dual Specificity Phosphatase 6 / genetics
Dual Specificity Phosphatase 6 / metabolism
Female
HEK293 Cells
Humans
Oncogene Protein p21(ras) / genetics
Oncogene Protein p21(ras) / metabolism*
Signal Transduction*
Transcription Factors / genetics
Transcription Factors / metabolism
Transcription, Genetic*
Transforming Growth Factor beta / genetics
Transforming Growth Factor beta / metabolism*
Tumor Suppressor Protein p53 / genetics
Tumor Suppressor Protein p53 / metabolism
Tumor Suppressor Proteins / genetics
Tumor Suppressor Proteins / metabolism
|
| IF |
6.467
|
| リソース情報 |
| ヒト・動物細胞 |
A431 |
