Genome-wide analysis of long noncoding RNA and mRNA co-expression profile in intrahepatic cholangiocarcinoma tissue by RNA sequencing
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Wenhui Yang1,2, Yuan Li3, Xia Song2, Jun Xu2, Jun Xie1
1Department of Biochemistry and Molecular Biology, Shanxi Medical University, Taiyuan, Shanxi, China
2Shanxi Province Cancer Hospital, Affiliated Cancer Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
3Department of Thoracic Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
Jun Xu, email: email@example.com
Jun Xie, email: firstname.lastname@example.org
Keywords: intrahepatic cholangiocarcinoma, long noncoding RNA, co-expression, RNA sequencing
Received: January 10, 2017 Accepted: February 13, 2017 Published: February 24, 2017
Long noncoding RNAs (lncRNAs), which are pervasively transcribed in the genome, are emerging in molecular biology as crucial regulators of cancer. RNA-seq data were downloaded from GEO of NCBI and further analyzed to identify novel targets in intrahepatic cholangiocarcinoma (iCCA).We investigated differences in lncRNA and mRNA profiles between 7 pairs of iCCA and adjacent normal tissues. 230 lncRNAs were differentially expressed more than four-fold change in iCCA tissues. Among these, 97 were upregulated and 133 downregulated relatively to normal tissues. Moreover, 169 lncRNAs and 597 mRNAs formed the lncRNA-mRNA co-expression network which consist 766 network nodes and 769 connection edges. Bioinformatics analysis identified these dysregulated lncRNAs were associated with cholesterol homeostasis, insoluble fraction and lipid binding activity and were enriched in complement and coagulation cascades and PPAR signaling pathway. These results uncovered the landscape of iCCA-associated lncRNAs and co-expression network, providing insightful information about dysregulated lncRNAs in iCCA.
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