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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Jpn+J+Cancer+Res
1994 ; 85
(5
): 459-63
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Close correlation between the dephosphorylation of p53 and growth suppression by
transforming growth factor-beta 1 in nasopharyngeal carcinoma cells transduced
with adenovirus early region genes
#MMPMID8014102
Mogi Y
; Kato J
; Horimoto M
; Takimoto R
; Murakami T
; Hirayama A
; Kohgo Y
; Watanabe N
; Niitsu Y
Jpn J Cancer Res
1994[May]; 85
(5
): 459-63
PMID8014102
show ga
The mechanism of growth inhibition by transforming growth factor (TGF)-beta 1 was
investigated. We examined the growth inhibitory effects of TGF-beta 1 on human
nasopharyngeal carcinoma (KB) cells which constitutively expressed p53. TGF-beta
1 suppressed the DNA synthesis of KB cells in a dose-dependent manner. It had
minimal effect on adenovirus-2-transduced KB cells expressing either adenovirus
early region 1B (E1B) or 1A (E1A) product, which respectively binds to p53 or Rb
product and inhibits its function, and no growth inhibition at all was observed
with KB cells expressing both E1B and E1A products. Dephosphorylation of the p53
was promoted by TGF-beta 1 stimulation in KB cells, but not in E1B-producing KB
cells, which sequestrate the function of p53. The growth inhibition of KB cells
by TGF-beta 1 was significantly reduced by treatment with okadaic acid. These
results suggest that p53 transduces the antiproliferative signal of TGF-beta 1
possibly through its dephosphorylation.