Overexpression of kappa-actin alters growth properties of hepatoma cells and predicts poor postoperative prognosis.

Abstract:

UNLABELLED:Since Rho-mediated signaling can regulate liver cancer cell proliferation, amino acid sequence changes of its downstream targets, actins, might alter the properties of cell growth. Here, we investigated the function of a novel class of actins, named κ-actins, in hepatocellular carcinoma (HCC). MATERIALS AND METHODS:Alexander cells overexpressing an HCC-derived κ-actin (Alex-κ cells) were established to study growth property changes. κ-actin expression was also determined in tumor and noncancerous tissues from 72 HCC patients. Survival analysis was conducted to evaluate the prognostic predictive value of κ-actin expression. RESULTS:Phylogenetic analysis showed that κ-actin sequences constituted 94.7% and 17.6% of actin transcripts in Alex-κ and naive Alexander cells, respectively. Alex-κ cells exhibited serum-independent cell growth with increased anchorage-independent colony formation and BrdU incorporation upon serum deprivation. Cox proportional hazard analysis showed that κ-actin expression in both cancerous and noncancerous tissues predicted poorer postoperative disease-free survival (p=0.004). CONCLUSION:Overexpression of κ-actin altered growth properties of hepatoma cells, contributing to poor postoperative prognosis.

journal_name

Anticancer Res

journal_title

Anticancer research

authors

Chang KW,Chou A,Lee CC,Yeh C,Lai MW,Yeh TS,Chen TC,Liang KH,Yeh CT

subject

Has Abstract

pub_date

2011-06-01 00:00:00

pages

2037-44

issue

6

eissn

0250-7005

issn

1791-7530

pii

31/6/2037

journal_volume

31

pub_type

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