Knockdown of Long Noncoding RNA CCAT2 Suppresses Malignant Phenotype in Human Laryngeal Squamous Cell Carcinoma

被引：0
作者：
M. Li
J. An
H. Ren
J. Gui
H. Wang
S. Wu
R. Wu
H. Xiao
L. Wang
机构：
[1] The Second Affiliated Hospital of Harbin Medical University,Department of Otolaryngology
[2] XuZhou Clinical School of Xuzhou Medical University,Head and Neck Surgery
[3] The First Affiliated Hospital of Harbin Medical University,Department of Otolaryngology, XuZhou Central Hospital
[4] The Second Affiliated Hospital of Harbin Medical University,Department of Infection Control
来源：
Bulletin of Experimental Biology and Medicine | 2023年 / 175卷
关键词：
laryngeal squamous cell carcinoma; long noncoding RNA colon cancer-associated transcript 2 (CCAT2); proliferation; apoptosis; cyclin-dependent kinase 8;
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学科分类号：
摘要：
This study aimed to explore the biological role and mechanism underlying the effects of colon cancer-associated transcript 2 (CCAT2), a long noncoding RNA (lncRNA) in human laryngeal squamous cell carcinoma (LSCC). CCAT2 expression levels in clinical LSCC samples and TU-212 cell line were evaluated by quantitative real-time PCR. The correlation of CCAT2 expression level with clinical-pathological characteristics of patients and their prognosis was analyzed. The functional role of CCAT2 in human LSCC was assessed by Cell Counting Kit-8, Transwell assay, flow cytometric analysis, and LSCC xenograft experiment in vivo. The expression of potential targeted proteins was detected by Western blotting and immunohistochemistry. We found that expression of CCAT2 was significantly elevated in LSCC tissues and TU-212 cells (p<0.05). Survival analysis showed that LSCC patients with high expression of CCAT2 had a shorter 5-year overall survival rate than those with low expression (p<0.05). In addition, CCAT2 silencing with short hairpin RNA significantly decreased the proliferative and invasive potential of TU-212 cells (p<0.05) and promoted their apoptosis. In Nude mice, CCAT2 knockdown suppressed the growth of tumor and decreased its volume and weight in comparison with the controls (p<0.05). In TU-212 cells, CCAT2 silencing with short hairpin RNA significantly down-regulated the expression of β-catenin and CDK8 (p<0.05). Thus, knockdown of CCAT2 suppresses proliferation and invasion of the cells and inhibits Wnt/β-catenin signaling pathway in LSCC, which indicates novel therapeutic targets and prognostic indicators in patients with LSCC.
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页码：673 / 680
页数：7
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