Objective: Long noncoding RNA LINC00675 (LINC00675) seems to play an anti-oncogenic role in cancers, though its exact function remains unknown. Up to date, little is known about the role of LINC00675 in esophageal squamous cell carcinoma (ESCC). In this study, we aimed to explore the expression pattern, clinical significance and biological function of LINC00675 in ESCC.
Patients And Methods: RT-PCR was performed to detect the expression levels of LINC00675 in both ESCC tissue and cell lines. The association of LINC00675 expression with clinicopathological factors and prognosis was statistically analyzed. Cell growth was detected by MTT assay and colony formation assay. Cell apoptosis was evaluated with flow cytometry. Migration and invasion ability of ESCC cells were detected wound healing assay and transwell assays. The expressions of EMT-related proteins and Wnt/β-catenin-related proteins by Western blot were investigated.
Results: LINC00675 expression was significantly downregulated in both ESCC tissues and cell lines. Decreased LINC00675 expression was correlated with histological grade, lymph nodes metastasis and advanced clinical stage. Furthermore, LINC00675 could serve as an independent predictor for overall survival in ESCC. Importantly, in vitro experiments indicated that that forced LINC00675 expression significantly suppressed inhibited ESCC cell proliferation, colony formation, migration, invasion and EMT, and promoted cell apoptosis through suppressing Wnt/β-catenin signaling pathway.
Conclusions: We suggested that LINC00675 acted as a tumor suppressor in ESCC via regulation of Wnt/β-catenin signaling pathway and may be a new prognostic biomarker and potential therapeutic target for ESCC intervention.
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