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2017 ; 8
(18
): 3742-3754
Nephropedia Template TP
Zhang N
; Ma D
; Wang L
; Zhu X
; Pan Q
; Zhao Y
; Zhu W
; Zhou J
; Wang L
; Chai Z
; Ao J
; Sun H
; Tang Z
J Cancer
2017[]; 8
(18
): 3742-3754
PMID29151962
show ga
Radiofrequency ablation (RFA) is one of the standards of care for early stage
hepatocellular carcinoma (HCC). However, rapid progression of residual tumor
after RFA has been confirmed. The aim of this study was to investigate the
underlying mechanism of this phenomenon. Human HCC cell lines HCCLM3 and HepG2
were employed to establish insufficient RFA models in vivo and in vitro,
respectively. The effects of insufficient RFA on metastatic potential of residual
tumors were evaluated. The molecular changes after insufficient RFA were
evaluated by PCR array, western blot, immunofluorescence, and
immunohistochemistry. Results showed that insufficient RFA significantly promoted
lung and intrahepatic residual tumor cells in vivo, and heat intervention
promoted migration and invasion of hepatoma cells in vitro. PCR array revealed
that the expression of integrin ?3 (ITGB3) and MMP2 were up-regulated in the
residual tumors of HCCLM3 xenograft model. The up-regulation of ITGB3 was
confirmed by qRT-PCR, Western blot and immunohistochemistry. Knockdown ITGB3
expression in HCCLM3 cells by shRNA significantly lowered the pro-metastatic
effects of insufficient RFA. Mechanism studies indicated that ITGB3 mediated the
expression of MMP2 by activing FAK/PI3K/AKT signaling pathway. The up-regulation
of ITGB3 contributed to enhanced metastatic potential of residual cancer in
HCCLM3 model after insufficient RFA. Targeting ITGB3 expression may further
improve the clinical effects of RFA.