MicroRNA co-expression networks exhibit increased complexity in pancreatic ductal compared to Vater's papilla adenocarcinoma

Tommaso Mazza, Massimiliano Copetti, Daniele Capocefalo, Caterina Fusilli, Tommaso Biagini, Massimo Carella, Antonio De Bonis, Nicola Mastrodonato, Ada Piepoli, Valerio Pazienza, Evaristo Maiello, Fabio Francesco di Mola, Pierluigi di Sebastiano, Angelo Andriulli, Francesca Tavano

Research output: Contribution to journalArticlepeer-review

Abstract

MiRNA expression abnormalities in adenocarcinoma arising from pancreatic ductal system (PDAC) and Vater's papilla (PVAC) could be associated with distinctive pathologic features and clinical cancer behaviours. Our previous miRNA expression profiling data on PDAC (n=9) and PVAC (n=4) were revaluated to define differences/ similarities in miRNA expression patterns. Afterwards, in order to uncover target genes and core signalling pathways regulated by specific miRNAs in these two tumour entities, miRNA interaction networks were wired for each tumour entity, and experimentally validated target genes underwent pathways enrichment analysis. One hundred and one miRNAs were altered, mainly over-expressed, in PDAC samples. Twenty-six miRNAs were deregulated in PVAC samples, where more miRNAs were down-expressed in tumours compared to normal tissues. Four miRNAs were significantly altered in both subgroups of patients, while 27 miRNAs were differentially expressed between PDAC and PVAC. Although miRNA interaction networks were more complex and dense in PDAC than in PVAC, pathways enrichment analysis uncovered a functional overlapping between PDAC and PVAC. However, shared signalling events were influenced by different miRNA and/or genes in the two tumour entities. Overall, specific miRNA expression patterns were involved in the regulation of a limited core signalling pathways in the biology landscape of PDAC and PVAC.

Original languageEnglish
Pages (from-to)105320-105339
Number of pages20
JournalOncotarget
Volume8
Issue number62
DOIs
Publication statusPublished - Jan 1 2017

Keywords

  • Ampullary carcinoma
  • MicroRNA
  • Pancrearic ductal adenocarcinoma

ASJC Scopus subject areas

  • Oncology

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