MicroRNA‑155‑5p suppresses the migration and invasion of lung adenocarcinoma A549 cells by targeting Smad2
- Jianfeng Lin
- Youqin Chen
- Liya Liu
- Aling Shen
- Wei Zheng
Affiliations: Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China, Pediatric Department, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA, Academy of Integrative Medicine and Fujian Key Laboratory of Integrative Medicine on Geriatrics, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China
- Published online on: June 4, 2018 https://doi.org/10.3892/ol.2018.8889
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Lung cancer is one of the major causes of cancer‑related deaths worldwide. Notably, miR‑155‑5p is one of the most amplified miRNAs in non‑small cell lung carcinoma (NSCLC). However, the role of miR‑155‑5p in lung cancer metastasis has not been fully evaluated. In the present study, miR‑155‑5p mimic and inhibitor were used to investigate the effects of miR‑155‑5p on the metastasis of human lung carcinoma A549 cells. The study indicated that transfection of miR‑155‑5p mimic significantly suppressed cell proliferation, migration and invasion of A549 cells, whereas its inhibition significantly promoted cell proliferation, migration and invasion of A549 cells, suggesting a potential therapeutic application of miR‑155‑5p in controlling lung cancer metastasis. Moreover, transfection of miR‑155‑5p mimic suppressed the expression of Smad2/3, ZEB1, ZEB2 and N‑cadherin and induced that of E‑cadherin, whereas its inhibition significantly upregulated the expression of Smad2/3, ZEB1, ZEB2 and N‑cadherin and downregulated that of E‑cadherin. Collectively, the findings suggest that miR‑155‑5p suppresses the proliferation, migration and invasion of A549 cells. Therefore, loss of miR‑155‑5p may serve an essential role in tumorigenesis and tumour progression in lung cancers.