β-Catenin loss in hepatocytes promotes hepatocellular cancer after diethylnitrosamine and phenobarbital administration to mice.
β-Catenin loss in hepatocytes promotes hepatocellular cancer after diethylnitrosamine and phenobarbital administration to mice.
复制标题
DOI:
10.1371/journal.pone.0039771
复制
发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Monga SP
中科院分区:
文献类型:
--
作者:
Awuah PK;Rhieu BH;Singh S;Misse A;Monga SP
Hepatocellular Carcinoma (HCC) is the fifth most common cancer worldwide. β-Catenin, the central orchestrator of the canonical Wnt pathway and a known oncogene is paramount in HCC pathogenesis. Administration of phenobarbital (PB) containing water (0.05% w/v) as tumor promoter following initial injected intraperitoneal (IP) diethylnitrosamine (DEN) injection (5 µg/gm body weight) as a tumor inducer is commonly used model to study HCC in mice. Herein, nine fifteen-day male β-catenin knockout mice (KO) and fifteen wild-type littermate controls (WT) underwent DEN/PB treatment and were examined for hepatic tumorigenesis at eight months. Paradoxically, a significantly higher tumor burden was observed in KO (p<0.05). Tumors in KO were β-catenin and glutamine synthetase negative and HGF/Met, EGFR & IGFR signaling was unremarkable. A significant increase in PDGFRα and its ligand PDGF-CC leading to increased phosphotyrosine-720-PDGFRα was observed in tumor-bearing KO mice (p<0.05). Simultaneously, these livers displayed increased cell death, stellate cell activation, hepatic fibrosis and cell proliferation. Further, PDGF-CC significantly induced hepatoma cell proliferation especially following β-catenin suppression. Our studies also demonstrate that the utilized DEN/PB protocol in the WT C57BL/6 mice did not select for β-catenin gene mutations during hepatocarcinogenesis. Thus, DEN/PB enhanced HCC in mice lacking β-catenin in the liver may be due to their ineptness at regulating cell survival, leading to enhanced fibrosis and regeneration through PDGFRα activation. β-Catenin downregulation also made hepatoma cells more sensitive to receptor tyrosine kinases and thus may be exploited for therapeutics.
登录
查看更多内容
影响因子:
13.5
作者:
Nejak-Bowen, Kari N.;Thompson, Michael D.;Singh, Sucha;Bowen, William C., Jr.;Dar, Mohd Jamal;Khillan, Jaspal;Dai, Chunsun;Monga, Satdarshan P. S.
通讯作者:
Monga, Satdarshan P. S.
DOI:
10.1073/pnas.0409722102
发表时间:
2005-03-01
影响因子:
11.1
作者:
Campbell, JS;Hughes, SD;Fausto, N
通讯作者:
Fausto, N
影响因子:
10.4
作者:
GOLDFARB, S;PUGH, TD;HE, YZ
通讯作者:
HE, YZ
影响因子:
14.5
作者:
Nejak-Bowen KN;Monga SP
通讯作者:
Monga SP
影响因子:
6
作者:
Behari, Jaideep;Yeh, Tzu-Hsuan;Monga, Satdarshan P. S.
通讯作者:
Monga, Satdarshan P. S.