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Title: Trefoil factor 3 mediation of oncogenicity and chemoresistance in hepatocellular carcinoma is AKT-BCL-2 dependent
Authors: You, M.-L 
Chen, Y.-J 
Chong, Q.-Y 
Wu, M.-M
Pandey, V 
Chen, R.-M 
Liu, L
Ma, L
Wu, Z.-S
Zhu, T
Lobie, P.E 
Keywords: doxorubicin
protein bcl 2
protein kinase B
trefoil factor 3
anchorage independent growth
animal experiment
animal model
animal tissue
cancer growth
cancer resistance
cancer stem cell
cancer survival
cell invasion
cell migration
cell proliferation
cell survival
clinical feature
controlled study
drug targeting
hepatocellular carcinoma cell line
human cell
human tissue
liver cell carcinoma
major clinical study
protein expression
protein function
Issue Date: 2017
Citation: You, M.-L, Chen, Y.-J, Chong, Q.-Y, Wu, M.-M, Pandey, V, Chen, R.-M, Liu, L, Ma, L, Wu, Z.-S, Zhu, T, Lobie, P.E (2017). Trefoil factor 3 mediation of oncogenicity and chemoresistance in hepatocellular carcinoma is AKT-BCL-2 dependent. Oncotarget 8 (24) : 39323-39344. ScholarBank@NUS Repository.
Abstract: The efficacious treatment of hepatocellular carcinoma (HCC) remains a challenge, partially being attributed to intrinsic chemoresistance. Previous reports have observed increased TFF3 expression in HCC. Herein, we investigated the functional role of TFF3 in progression of HCC, and in both intrinsic and acquired chemoresistance. TFF3 expression was observed to be upregulated in HCC and associated with poor clinicopathological features and worse patient survival outcome. Functionally, forced expression of TFF3 in HCC cell lines increased cell proliferation, cell survival, anchorage-independent and 3D matrigel growth, cell invasion and migration, and in vivo tumor growth. In contrast, depleted expression of TFF3 decreased the oncogenicity of HCC cells as indicated by the above parameters. Furthermore, forced expression of TFF3 decreased doxorubicin sensitivity of HCC cells, which was attributed to increased doxorubicin efflux and cancer stem cell-like behavior of Hep3B cells. In contrast, depletion of TFF3 increased doxorubicin sensitivity and decreased cancer stem cell-like behavior of Hep3B cells. Correspondingly, TFF3 expression was markedly increased in Hep3B cells with acquired doxorubicin resistance, while the depletion of TFF3 resulted in re-sensitization of the Hep3B cells to doxorubicin. The increased doxorubicin efflux and enhanced cancer stem cell-like behavior of the doxorubicin-resistant Hep3B cells was observed to be dependent on TFF3 expression. In addition, we determined that TFF3-stimulated oncogenicity and chemoresistance in HCC cells was mediated by AKT-dependent expression of BCL-2. Hence, therapeutic inhibition of TFF3 should be considered to hinder HCC progression and overcome intrinsic and acquired chemoresistance in HCC. © You et al.
Source Title: Oncotarget
ISSN: 19492553
DOI: 10.18632/oncotarget.16950
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