Abstract
To compare the microRNAs (miRNAs) contained within serum exosomes isolated from patients with Raynaud's phenomenon (RP) and negative antinuclear antibodies (ANA) to the miRNA contained in serum exosomes isolated from patients with RP and positive ANA. Serum exosomes were isolated employing a polymer precipitation procedure. Next Generation Sequencing (NGS) was used to identify the miRNAs contained in the exosomes isolated from the two clinical cohorts and to analyse the differences in their contents. The NGS results identified six miRNAs that displayed significant differences in their content between serum exosomes from patients with RP with negative serum ANA compared to miRNAs contained in serum exosomes from patients with ANA-positive RP. A comparative analysis of miRNAs contained within serum exosomes of patients with RP and negative ANA vs. samples from patients with RP and positive ANA identified several differentially expressed miRNAs that may represent non-invasive biomarkers to assist in the identification of patients with RP at risk of evolving into systemic sclerosis.
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