title: Identfication of key miRNAs in pancreatitis using bioinformatics analysis of microarray data.
abstract: Pancreatitis is a type of inflammation in the pancreas, which frequently occurs due to alcohol and gallstones. The present study aimed to identify pancreatitis‑associated microRNAs (miRNAs) by analyzing the microarray of GSE24279. GSE24279 was downloaded from the Gene Expression Omnibus, composed of a collective of 27 pancreatitis and 22 normal control samples. The differentially expressed miRNAs (DE‑miRNAs) in pancreatitis samples were screened using the Limma package in Bioconductor. Subsequently, target genes of the DE‑miRNAs were predicted using the miRecords and miRWalk databases. Their potential functions were analyzed by functional and pathway enrichment analysis using the Database for Annotation, Visualization and Integrated Discovery online tool. Finally, pancreatitis‑associated genes among the target genes identified were searched using the Comparative Toxicogenomics Database, and a regulatory network of pancreatitis‑associated genes and their target miRNAs were constructed using Cytoscape software. A total 14 upregulated and 39 downregulated miRNAs were identified in pancreatitis samples compared with control samples and 290 target genes of DE‑miRNAs were determined. Cyclin D1 (CCND1), v‑akt murine thymoma viral oncogene homolog 2 (AKT2), cyclin‑dependent kinase 6 (CDK6) and SMAD family member 2 (SMAD2) were involved in the pathway of pancreatic cancer. Among the target genes, 279 genes were pancreatitis‑associated genes, which in turn were targeted by 37 miRNAs in the regulatory network. Hsa‑miR‑15a, hsa‑miR‑16, hsa‑miR‑155, hsa‑miR‑375 and hsa‑miR‑429 in particular may be involved in pancreatitis by targeting genes in the regulatory network, including hsa‑miR‑15a→CCND1, hsa‑miR‑16→CCND1, hsa‑miR‑155→CCND1/SMAD2, hsa‑miR‑375→AKT2/CDK6 and hsa‑miR‑429→CCND1. The above miRNAs and their targets may contribute to the pathogenesis of pancreatitis; therefore, they may be potential therapeutic targets.
authors.affiliation: Department of Hepatobiliary Surgery, The First Affiliated Hospital of Chinese PLA General Hospital, Beijing 100048, P.R. China.
authors.forename: Dadong
authors.initials: D
authors.lastname: Wang
authors.affiliation: Department of Hepatobiliary Surgery, The First Affiliated Hospital of Chinese PLA General Hospital, Beijing 100048, P.R. China.
authors.forename: Zi-Man
authors.initials: ZM
authors.lastname: Zhu
authors.affiliation: Department of Hepatobiliary Surgery, The First Affiliated Hospital of Chinese PLA General Hospital, Beijing 100048, P.R. China.
authors.forename: Yu-Liang
authors.initials: YL
authors.lastname: Tu
authors.affiliation: Department of Hepatobiliary Surgery, The First Affiliated Hospital of Chinese PLA General Hospital, Beijing 100048, P.R. China.
authors.forename: Chun-Qing
authors.initials: CQ
authors.lastname: Dou
authors.affiliation: Department of Second Surgical Oncology, Chinese PLA General Hospital, Beijing 100853, P.R. China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Department of Second Surgical Oncology, Chinese PLA General Hospital, Beijing 100853, P.R. China.
authors.forename: Xiang-Long
authors.initials: XL
authors.lastname: Tan
authors.affiliation: Department of Hepatobiliary Surgery, The First Affiliated Hospital of Chinese PLA General Hospital, Beijing 100048, P.R. China.
authors.forename: Ming-Ming
authors.initials: MM
authors.lastname: Han
authors.affiliation: Department of Hepatobiliary Surgery, The First Affiliated Hospital of Chinese PLA General Hospital, Beijing 100048, P.R. China.
authors.forename: Zhuang-Jie
authors.initials: ZJ
authors.lastname: Yang
authors.affiliation: Department of Hepatobiliary Surgery, The First Affiliated Hospital of Chinese PLA General Hospital, Beijing 100048, P.R. China.
authors.forename: Xin
authors.initials: X
authors.lastname: Jin
authors.affiliation: Department of Hepatobiliary Surgery, The First Affiliated Hospital of Chinese PLA General Hospital, Beijing 100048, P.R. China.
authors.forename: Bao
authors.initials: B
authors.lastname: Zhang
authors.affiliation: Department of Hepatobiliary Surgery, Chinese PLA General Hospital, Beijing 100853, P.R. China.
authors.forename: Shouwang
authors.initials: S
authors.lastname: Cai
authors.affiliation: Department of Hepatobiliary Surgery, Chinese PLA General Hospital, Beijing 100853, P.R. China.
authors.forename: Zhi-Wei
authors.initials: ZW
authors.lastname: Liu
mesh_terms: D016000:Cluster Analysis; D019295:Computational Biology / Q000379:methods; D030541:Databases, Genetic; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation; D053263:Gene Regulatory Networks; D006801:Humans; D035683:MicroRNAs / Q000235:genetics*; D010195:Pancreatitis / Q000235:genetics*; D034622:RNA Interference; D012333:RNA, Messenger / Q000235:genetics
chemical_list: D035683:MicroRNAs; D012333:RNA, Messenger