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miRFA: an automated pipeline for microRNA functional analysis with correlation support from TCGA and TCPA expression data in pancreatic cancer
Umeå universitet, Medicinska fakulteten, Institutionen för kirurgisk och perioperativ vetenskap.
Umeå universitet, Medicinska fakulteten, Institutionen för kirurgisk och perioperativ vetenskap.ORCID-id: 0000-0002-7516-9543
2019 (Engelska)Ingår i: BMC Bioinformatics, ISSN 1471-2105, E-ISSN 1471-2105, Vol. 20, artikel-id 393Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Background: MicroRNAs (miRNAs) are small RNAs that regulate gene expression at a post-transcriptional level and are emerging as potentially important biomarkers for various disease states, including pancreatic cancer. In silico-based functional analysis of miRNAs usually consists of miRNA target prediction and functional enrichment analysis of miRNA targets. Since miRNA target prediction methods generate a large number of false positive target genes, further validation to narrow down interesting candidate miRNA targets is needed. One commonly used method correlates miRNA and mRNA expression to assess the regulatory effect of a particular miRNA.

The aim of this study was to build a bioinformatics pipeline in R for miRNA functional analysis including correlation analyses between miRNA expression levels and its targets on mRNA and protein expression levels available from the cancer genome atlas (TCGA) and the cancer proteome atlas (TCPA). TCGA-derived expression data of specific mature miRNA isoforms from pancreatic cancer tissue was used.

Results: Fifteen circulating miRNAs with significantly altered expression levels detected in pancreatic cancer patients were queried separately in the pipeline. The pipeline generated predicted miRNA target genes, enriched gene ontology (GO) terms and Kyoto encyclopedia of genes and genomes (KEGG) pathways. Predicted miRNA targets were evaluated by correlation analyses between each miRNA and its predicted targets. MiRNA functional analysis in combination with Kaplan-Meier survival analysis suggest that hsa-miR-885-5p could act as a tumor suppressor and should be validated as a potential prognostic biomarker in pancreatic cancer.

Conclusions: Our miRNA functional analysis (miRFA) pipeline can serve as a valuable tool in biomarker discovery involving mature miRNAs associated with pancreatic cancer and could be developed to cover additional cancer types. Results for all mature miRNAs in TCGA pancreatic adenocarcinoma dataset can be studied and downloaded through a shiny web application at https://emmbor.shinyapps.io/mirfa/.

Ort, förlag, år, upplaga, sidor
BioMed Central, 2019. Vol. 20, artikel-id 393
Nyckelord [en]
miRNA functional analysis, miRNA target prediction, Functional enrichment, Mature miRNA, TCGA, TCPA, Pancreatic cancer
Nationell ämneskategori
Bioinformatik och systembiologi
Identifikatorer
URN: urn:nbn:se:umu:diva-161899DOI: 10.1186/s12859-019-2974-3ISI: 000475761100001PubMedID: 31311505Scopus ID: 2-s2.0-85069159500OAI: oai:DiVA.org:umu-161899DiVA, id: diva2:1341174
Tillgänglig från: 2019-08-07 Skapad: 2019-08-07 Senast uppdaterad: 2019-08-07Bibliografiskt granskad

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