Analysis of plasma-derived exosomal microRNAs as potential biomarkers for canine idiopathic epilepsy

García-Gracia, Mireya ; Moreno-Martinez, Laura (Universidad de Zaragoza) ; Hernaiz, Adelaida (Universidad de Zaragoza) ; Usón, Sebastián ; Moral, Jon ; Sanz-Rubio, David ; Zaragoza, Pilar (Universidad de Zaragoza) ; Palacio, Jorge (Universidad de Zaragoza) ; Rosado, Belén (Universidad de Zaragoza) ; Osta, Rosario (Universidad de Zaragoza) ; García-Belenguer, Sylvia ; Martín Burriel, Inmaculada (Universidad de Zaragoza)

Resumen: Epilepsy is one of the most prevalent complex neurological diseases in both the canine and human species, with the idiopathic form as its most common diagnosis. MicroRNAs (miRNAs) are small, noncoding RNA molecules that play a role in gene regulation processes and appear to be a promising biological target for convulsion control. These molecules have been reported as constituents of the internal content of exosomes, which are small extracellular vesicles released by cells. In this study, exosome samples were isolated from the plasma of 23 dogs, including 9 dogs with epilepsy responsive to treatment, 6 dogs with drug-resistant epilepsy, and 8 control dogs. Plasma exosomes were then characterized by electron transmission microscopy, nanoparticle tracking analysis, and dot blotting. Afterwards, the microRNA-enriched RNA content of exosomes was isolated, and miRNA quantification was performed by quantitative real-time PCR. Seven circulating miRNAs that have been previously described in the literature as potential diagnostic or prognostic biomarkers for epilepsy were evaluated. We observed significant differences in miR-16 (p < 0.001), miR-93-5p (p < 0.001), miR-142 (p < 0.001), miR-574 (p < 0.01), and miR-27 (p < 0.05) levels in dogs with refractory epilepsy compared to the control group. In drug-sensitive epileptic dogs, miR-142 (p < 0.01) showed significant differences compared to healthy dogs. Moreover, distinct levels of miR-16 (p < 0.05), miR-93-5p (p < 0.01), miR-132 (p < 0.05), and miR-574 (p < 0.05) were also found between drug-sensitive and drug-resistant epileptic dogs. Our results present plasma-circulating exosomes as an advantageous source of epileptic biomarkers, highlighting the potential of miRNAs as prognostic and diagnostic biomarkers of canine idiopathic epilepsy.

Idioma: Inglés

DOI: 10.3390/ani14020252

Año: 2024

Publicado en: Animals 14, 2 (2024), 252 [15 pp.]
ISSN: 2076-2615

Financiación: info:eu-repo/grantAgreement/ES/DGA/A19-23R
Financiación: info:eu-repo/grantAgreement/ES/DGA/LMP134-21
Financiación: info:eu-repo/grantAgreement/ES/ISCIII/CB18-05-0037
Financiación: info:eu-repo/grantAgreement/ES/ISCIII/FEDER/PI21-00372

Tipo y forma: Article (Published version)

Área (Departamento): Área Genética (Dpto. Anatom.,Embri.Genét.Ani.)
Área (Departamento): Área Farmacología (Dpto. Farmac.Fisiol.y Med.L.F.)
Área (Departamento): Área Medicina y Cirugía Animal (Dpto. Patología Animal)