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ORIGINAL ARTICLE
Year : 2016  |  Volume : 12  |  Issue : 1  |  Page : 395-400

Abberent expression of oncogenic and tumor-suppressive microRNAs and their target genes in human adenocarcinoma alveolar basal epithelial cells


1 Department of Molecular Genetics, Science and Research Branch, Islamic Azad University, Fars; Department of Molecular Medicine, Biotechnology Research Center, Pasture Institute of Iran, Tehran, Iran
2 Department of Molecular Genetics, Science and Research Branch, Islamic Azad University, Fars, Tehran, Iran
3 Department of Medical Science, Tracheal Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4 Department of Oncology, Queen Elizabeth Hospital, Kowloon, Hong Kong
5 Department of Molecular Medicine, Biotechnology Research Center, Pasture Institute of Iran, Tehran, Iran

Correspondence Address:
Morteza Karimipoor
Department of Molecular Medicine, Biotechnology Research Center, Pasture Institute of Iran, 1316943551 Pasteur Institute of Iran, Tehran
Iran
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0973-1482.148673

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Context: Lung cancer is one of the most serious types of cancer that often diagnosed at advanced stage. MicroRNAs (miRNAs) are small non-coding molecules which silence gene expression of target gene (s) at posttranscriptional level. They are key regulators of cell cycle, apoptosis, anti-cancer drug responsiveness and metastasis. Aims: Identification of the differential expression level of miR-15a/16, miR-21, miR-34a, miR-126, miR-128 and miR-210 in A549 cell line versus normal tissues and their correlation with selected corresponding target genes. Materials and Methods: A549 cell line was cultured in F-12K medium and miRNA was extracted from normal tissues (2-3 cm adjacent to tumor tissue) and A549 cell line. cDNA was synthesized with specific stem-loop primers for each miRNA, while OligodT primer was used for target genes cDNA synthesis. Real-time quantitative polymerase chain reaction. (RT-qPCR) was used to analyze the expression pattern of miRNAs and target genes in A549 and normal non-small cell lung carcinoma. (NSCLC) tissues. Results: miR-15a/16, miR-34a, miR-126 and miR-128 were down-regulated significantly. (>2-fold change), while miR-21 and miR.210 were up-regulated in A549. Bcl-2 as miR-34a target gene was down-regulated while Hif-1α and Akt-3 were up-regulated that might be miR-210 and miR-34a target genes, respectively. Conclusion: The significant differential expression level of these miRNAs made them as candidate biomarkers in NSCLC tumor tissues of patients. Perhaps Bcl-2 down-regulation and Akt-3 up-regulation can be linked with survival signals in A549 cell line. We can conclude that Bcl-2 and Akt-3 might be therapeutic targets to inhibit cell proliferation in NSCLC.


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