Expression of metastasis‑associated lung adenocarcinoma transcript 1 long non‑coding RNA in vitro and in patients with non‑small cell lung cancer

Lin,Ling; Li,Haiyan; Zhu,Yefei; He,Susu; Ge,Hongfei

doi:10.3892/ol.2018.8531

Expression of metastasis‑associated lung adenocarcinoma transcript 1 long non‑coding RNA in vitro and in patients with non‑small cell lung cancer

Authors:
- Ling Lin
- Haiyan Li
- Yefei Zhu
- Susu He
- Hongfei Ge
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Affiliations: Department of Respiratory Medicine, Taizhou Hospital of Wenzhou Medical University, Linhai, Zhejiang 317000, P.R. China, Department of Cardiothoracic Surgery, Taizhou Hospital of Wenzhou Medical University, Linhai, Zhejiang 317000, P.R. China
Published online on: April 18, 2018 https://doi.org/10.3892/ol.2018.8531
Pages: 9443-9449

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Abstract

The present study aimed to investigate the association between the expression of metastasis‑associated lung adenocarcinoma transcript 1 (MALAT1) long non‑coding RNA (lncRNA) and the recurrence of non‑small cell lung cancer (NSCLC) and to elucidate the potential mechanisms of MALAT1 in vitro. Between 1 June 1, 2010 and December 30, 2016, NSCLC tumor tissues and adjacent non‑cancerous tissues were obtained from 120 patients with NSCLC, who had undergone surgical resection at Taizhou Hospital of Wenzhou Medical University (Linhai, China). The total RNA of tissues and cells were extracted and the expression of MALAT1 was determined using a wound healing assay and reverse transcription quantitative polymerase chain reaction. In addition, MALAT1 expression in A549 cells was silenced using small interfering RNA. The proliferation, migration and invasion of cells were then assessed using a CellTiter 96 kit and Transwell assays. MALAT1 expression was significantly increased in NSCLC samples compared with expression in adjacent non‑cancerous tissues. Furthermore, the expression of MALAT1 in patients with NSCLC that exhibited recurrence was markedly higher than in those that did not. The results of the present study also demonstrated significant associations between high expression of MALAT1 and female sex, Tumor‑Node‑Metastasis advanced stage, vessel invasion, pathological differentiation and recurrence of patients with NSCLC. The proliferative, migratory and invasive abilities of MALAT1‑silenced A549 cells were significantly decreased compared with those of control cells. MALAT1 expression was significantly increased in NSCLC tissues and was revealed to serve a role in the progression of NSCLC.

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