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2017 ; 8
(2
): 3344-3354
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gab.com Text
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Hexokinase 2 enhances the metastatic potential of tongue squamous cell carcinoma
via the SOD2-H2O2 pathway
#MMPMID27926482
Wang W
; Liu Z
; Zhao L
; Sun J
; He Q
; Yan W
; Lu Z
; Wang A
Oncotarget
2017[Jan]; 8
(2
): 3344-3354
PMID27926482
show ga
The glycolytic enzyme hexokinase (HK2), which is aberrantly expressed in various
types of tumours, is associated with metastasis. However, its role in the
progression and metastasis of tongue squamous cell carcinoma (TSCC) remains
unclear. The results of our study showed that HK2 expression is often deregulated
in TSCC patients. Increased HK2 expression was associated with tumour stage,
clinical stage, lymph node metastasis, but not pathological grade, and reduced
overall survival. Microarray and western blotting analyses revealed increases in
HK2 expression in TSCC cells with higher metastatic potential. The following
effects were observed with HK2 knockdown: inhibition of cell migration and
invasion; reduced SOD2 activity and intracellular H2O2 levels; suppression of
pERK1/2, Slug and Vimentin expression; and inhibition of tumour growth and lung
metastasis in vivo. Conversely, HK2 overexpression promoted cell migration and
invasion, increased SOD2 activity and intracellular H2O2, and enhanced expression
of pERK1/2, Slug and Vimentin. Thus, our results demonstrate that deregulation of
HK2 expression has an important function in the progression of TSCC and may serve
as a biomarker of its metastatic potential in TSCC patients. HK2 enhances the
metastatic potential of TSCC by stimulating the SOD2-H2O2 pathway.