Expression profile of lncRNA and mRNA and analysis of ceRNA in lung cancer patients in Xuanwei / 医学研究生学报

ABSTRACT

Objective Xuanwei, Yunnan, is one of the areas with the highest incidence of lung cancer in China and in the world as well. This study was to explore the differential expressions of lncRNAs and mRNAs, establish a competing endogenous RNA (ceRNA) coexpression network, and find some new ideas for the diagnosis and treatment of lung cancer in the Xuanwei area.Methods Using the gene chip of the lncRNA + mRNA expression profile, we examined 10 pairs of samples of lung cancer and adjacent normal tissues from the patients in the Xuanwei area and analyzed differentially expressed mRNAs with such bioinformatics Methods as gene ontology (GO), Kyoto Encyclopedia Genomes (KEGG) pathway and network analyses.Results By comparison between the lung cancer and adjacent normal tissues, 384 differentially expressed lncRNAs were identified (fold change≥2.0, P<0.05), in which 78 were upregulated, with abParts as the most differentially expressed (fold change=7.522, and 306 downregulated, with XLOG-012046 as the most differentially expressed (fold change=9.001). Among the 946 differentially expressed mRNAs identified (fold change≥2.0, P<0.05), SPP1 was the most significantly upregulated (fold change=16.500) and AGER was the most significantly downregulated (fold change=14.377). Both up- and downregulated expressions of lncRNA and mRNA were found in the lung cancer tissue of the patients, the upregulated expression of mRNA involved mainly the calcium ion signaling pathway, phagosomes and hematopoietic cell lineage, while the downregulated expression of mRNA chiefly involved in the hematopoietic cell lineage and calcium ion signaling pathway. lncRNAs were correlated with mRNAs in a one-to-one or one-to-many manner, with the coexpression of p14245 (LINC00472) with Q9H8W2 and XLOG-005764. The expressions of SEMA5A and SEMA6A regulated by ENSG00000244513.2 (ceRNA score=0.461) and ENSG00000257424.1 (ceRNA score=0.372) were both decreased in the mRNA expression profile. SEMA5A participated mainly in cell adhesion, bioadhesion, and vasculature development, while SEMA6A chiefly in cell-surface receptor signal transduction, cell movement, and cytoskeleton.Conclusion The expression profile of differentially expressed lncRNAs was identified by microarray in the lung cancer tissue of the patients in Xuanwei, which may become a novel biomarker or therapeutic target of lung cancer in this area.