PRTN3 and rheumatoid arthritis: Samples showed high seropositivity for RF/ACPA (RA-patients) had significantly higher FC of PGEL of miR-146a than samples of OA-patients (P = 0.0002) and of GZ patients (P < 0.001) that showed RF/ACPA seronegativity, while the difference was insignificant (P = 0.381) versus FC of PGEL of miR-146a in samples of GZ patients that showed low RF/ACPA seropositivity.