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2018 ; 16
(1
): 46
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Identification and validation a TGF-?-associated long non-coding RNA of head and
neck squamous cell carcinoma by bioinformatics method
#MMPMID29490660
Huang T
; Huang W
; Lu H
; Zhang BY
; Ma J
; Zhao D
; Wang YJ
; Yu DH
; He X
J Transl Med
2018[Feb]; 16
(1
): 46
PMID29490660
show ga
BACKGROUND: The role of transforming growth factor? (TGF-?)-induced tumor
progression in advanced malignancy is well established, but the involvement of
long non-coding RNAs (lncRNAs) in TGF-? signaling remains unclear. This study
aimed to identify TGF-?-associated lncRNAs in head and neck squamous cell
carcinoma (HNSCC). METHODS: Expression profiling of lncRNAs was obtained using
Gene Expression Omnibus and The Cancer Genome Atlas. Real-time quantitative PCR
was used to analyze the expression of EPB41L4A-AS2 in HNSCC cell line. We used
bioinformatics resources (DAvID) to conduct Gene Ontology biological processes
and KEGG pathways at the significant level. Wound healing assay, cell migration
and invasion assays, were used to examine the effects of EPB41L4A-AS2 on tumor
cell metastasis in vivo. Protein levels of EPB41L4A-AS2 targets were determined
by western blot. RESULTS: A novel TGF-?-associated lncRNA, EPB41L4A-AS2, was
found downregulated by TGF-? and associated with invasion and metastasis. The
relationship of EPB41L4A-AS2 with the clinicopathological features and prognosis
of HNSCC patients was evaluated. Bioinformatic analyses revealed that
EPB41L4A-AS2 may be involved in processes associated with the tumor-associated
signaling pathway, especially the TGF-? signaling pathway. Furthermore, a
TGF-?-induced epithelial-to-mesenchymal transition (EMT) model was established.
Low EPB41L4A-AS2 expression was determined, and overexpression of this gene
inhibited cell migration and invasion in the EMT model. Moreover, EPB41L4A-AS2
suppressed TGFBR1 expression. CONCLUSIONS: EPB41L4A-AS2 might serve as a negative
regulator of TGF-? signaling and as an effective prognostic biomarker and
important target in anti-metastasis therapies of HNSCC patients.