Abstract
In this study, we set out to characterize the expression status of long non-coding RNA (lncRNA) Myocardial Infarction Associated Transcript (MIAT) in non-small cell lung cancer (NSCLC) and elucidate its mechanistic contribution to this disease. Relative expression levels of MIAT, Pellino E3 Ubiquitin Protein Ligase Family Member 3 (PELI3), and microRNA (miR)-128-3p were analyzed by real-time polymerase chain reaction. PELI3 protein level was determined by immunoblotting. Cell viability and proliferation were evaluated by the MTT assay and colony formation assay, respectively. Cell invasion and migration were assessed by wound-healing closure and transwell assays, respectively. The regulatory actions of miR-128-3p on both MIAT and PELI3 were interrogated by luciferase reporter assay. We demonstrated the aberrant upregulation of MIAT in NSCLC and its association with tumor progression. We further uncovered the negative correlation among MIAT, PELI3, and miR-128-3p. MIAT deficiency significantly compromised cell viability, proliferation, invasion, and migration, while increased miR-128-3p and decreased PELI3 expressions. Application of miR-128-3p inhibitor significantly stimulated luciferase activities driven by both MIAT and PELI3 promoter and phenotypically promoted cell viability, proliferation, migration, and invasion. Our study highlighted the mechanistic contribution of the MIAT/miR-128-3p/PELI3 signaling cascade in NSCLC.
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We appreciate the assistance of Large-scale Data Analysis Center of Cancer Precision Medicine-LinkDoc for clinical and pathological data collected.
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Li, F., Li, H., Li, S. et al. Long Non-coding RNA MIAT Mediates Non-small Cell Lung Cancer Development Through Regulating the miR-128-3p/PELI3 Axis. Biochem Genet 58, 867–882 (2020). https://doi.org/10.1007/s10528-020-09979-6
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DOI: https://doi.org/10.1007/s10528-020-09979-6