國家衛生研究院 NHRI:Item 3990099045/5608

NHRI > National Institute of Infectious Diseases and Vaccinology > Ih-Jen Su(2002-2015) > Periodical Articles > Item 3990099045/5608

Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/5608

Title:	Expression of T-cell lymphoma invasion and metastasis 2 (TIAM2) promotes proliferation and invasion of liver cancer
Authors:	Chen, JS;Su, IJ;Leu, YW;Young, KC;Sun, HS
Contributors:	Division of Infectious Diseases
Abstract:	The T-cell lymphoma invasion and metastasis 2 (TIAM2) gene is the homolog of human TIAM1, a Rac-specific guanine nucleotide exchange factor that plays important roles in neuron development and human malignancies. Although the role of TIAM1 is well characterized, the physiological and pathological functions of TIAM2 remain unknown. In this study, human cDNA and protein panels were evaluated for endogenous expression of TIAM2. Four hepatocellular carcinoma (HCC) cell lines and 91 HCC samples were used to demonstrate expression of TIAM2S (the short form of TIAM2) in cancer cells. In addition, HepG2 cells stably expressing TIAM2S were used for tumorigenic assays in both cellular and mouse models. We demonstrate that endogenous TIAM2S was induced in several human cancers including HCC. TIAM2S expression was undetectable in normal human liver but was induced in all HCC cell lines and in 86% (78/91) of HCC biopsies. TIAM2S expression was positively associated with TIAM1 expression, HBV infection, and metastatic phenotype. Expression of recombinant TIAM2S in HepG2 cells promoted growth and invasiveness. In vivo study using a xenografted mouse model demonstrated that induced endogenous expression of TIAM2S converted non-invasive human HCC cells into highly aggressive vascular tumors. Further examination revealed that TIAM2S expression resulted in up-regulation of N-cadherin and vimentin, and in redistribution of E-cadherin. These findings show, for the first time, that human TIAM2S is involved in HCC pathogenesis, and that increased expression of TIAM2S promotes epithelial-to-mesenchymal transition and results in proliferation and invasion in liver cancer cells.
Date:	2012-03
Relation:	International Journal of Cancer. 2012 Mar;130(6):1302-1313.
Link to:	http://dx.doi.org/10.1002/ijc.26117
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0020-7136&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000299250700007
Cited Times(Scopus):	http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84856121136
Appears in Collections:	[Ih-Jen Su(2002-2015)] Periodical Articles

Files in This Item:

File	Description	Size	Format
PB2011042108.pdf		3937Kb	Adobe PDF	1136	View/Open

Loading...