Author:
Lapitz Ainhoa,Arbelaiz Ander,O’Rourke Colm J.,Lavin Jose L.,Casta Adelaida La,Ibarra Cesar,Jimeno Juan P.,Santos-Laso Alvaro,Izquierdo-Sanchez Laura,Krawczyk Marcin,Perugorria Maria J.,Jimenez-Aguero Raul,Sanchez-Campos Alberto,Riaño Ioana,Gónzalez Esperanza,Lammert Frank,Marzioni Marco,Macias Rocio I.R.,Marin Jose J. G.,Karlsen Tom H.,Bujanda Luis,Falcón-Pérez Juan M.,Andersen Jesper B.,Aransay Ana M.,Rodrigues Pedro M.,Banales Jesus M.
Abstract
: Cholangiocarcinoma (CCA) comprises a group of heterogeneous biliary cancers with dismal prognosis. The etiologies of most CCAs are unknown, but primary sclerosing cholangitis (PSC) is a risk factor. Non-invasive diagnosis of CCA is challenging and accurate biomarkers are lacking. We aimed to characterize the transcriptomic profile of serum and urine extracellular vesicles (EVs) from patients with CCA, PSC, ulcerative colitis (UC), and healthy individuals. Serum and urine EVs were isolated by serial ultracentrifugations and characterized by nanoparticle tracking analysis, transmission electron microscopy, and immunoblotting. EVs transcriptome was determined by Illumina gene expression array [messenger RNAs (mRNA) and non-coding RNAs (ncRNAs)]. Differential RNA profiles were found in serum and urine EVs from patients with CCA compared to control groups (disease and healthy), showing high diagnostic capacity. The comparison of the mRNA profiles of serum or urine EVs from patients with CCA with the transcriptome of tumor tissues from two cohorts of patients, CCA cells in vitro, and CCA cells-derived EVs, identified 105 and 39 commonly-altered transcripts, respectively. Gene ontology analysis indicated that most commonly-altered mRNAs participate in carcinogenic steps. Overall, patients with CCA present specific RNA profiles in EVs mirroring the tumor, and constituting novel promising liquid biopsy biomarkers.
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61 articles.
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