The Inhibitory Role of miR-486-5p on CSC Phenotype Has Diagnostic and Prognostic Potential in Colorectal Cancer

Andrea Pisano, Carmen Griñan-Lison, Cristiano Farace, Giovanni Fiorito, Grazia Fenu, Gema Jiménez, Fabrizio Scognamillo, Jesùs Peña-Martin, Alessio Naccarati, Johannes Pröll, Sabine Atzmüller, Barbara Pardini, Federico Attene, Gabriele Ibba, Maria Giuliana Solinas, David Bernhard, Juan Antonio Marchal, Roberto Madeddu

Research output: Contribution to journalArticlepeer-review

Abstract

Colorectal cancer (CRC) is the third most frequent cancer worldwide and the second cause of cancer deaths. Increasing evidences supports the idea that the poor prognosis of patients is related to the presence of cancer stem cells (CSCs), a cell population able to drive cancer recurrence and metastasis. The deregulation of microRNAs (miRNAs) plays a role in the formation of CSC. We investigated the role of hsa-miR-486-5p (miR-486-5p) in CRC, CSCs, and metastasis, in order to reach a better understanding of the biomolecular and epigenetic mechanisms mir-486-5p-related. The expression of miR-486-5p was investigated in three different matrices from CRC patients and controls and in CSCs obtained from the CRC cell lines HCT-116, HT-29, and T-84. In the human study, miR-486-5p was up-regulated in serum and stool of CRC patients in comparison with healthy controls but down-regulated in tumor tissue when compared with normal mucosa. miR-486-5p was also down-regulated in the sera of metastatic patients. In vitro, miR-486-5p was down-regulated in CSC models and it induced an inhibitory effect on stem factors and oncogenes in the main pathways of CSCs. Our results provide a step forward in understanding the role of mir-486-5p in CRC and CSC, and suggest that further studies are needed to investigate its diagnostic and prognostic power, possibly in combination with other biomarkers.

Original languageEnglish
JournalCancers
Volume12
Issue number11
DOIs
Publication statusPublished - Nov 19 2020

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