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  • Title: Disease specific signature of circulating miR-150-5p and miR-21-5p in myasthenia gravis patients.
    Author: Punga AR, Andersson M, Alimohammadi M, Punga T.
    Journal: J Neurol Sci; 2015 Sep 15; 356(1-2):90-6. PubMed ID: 26095457.
    Abstract:
    PURPOSE: Reliable biological markers for patients with the autoimmune neuromuscular disorder myasthenia gravis (MG) are lacking. We determined whether levels of the circulating immuno-microRNAs miR-150-5p and miR-21-5p were elevated in sera from clinically heterogeneous MG patients, with and without immunosuppression, as compared to healthy controls and patients with other autoimmune disorders. METHODS: Sera from 71 MG patients and 55 healthy controls (HC) were analyzed for the expression levels of miR-150-5p and miR-21-5p with qRT-PCR. Sera were also assayed from 23 patients with other autoimmune disorders (AID; psoriasis, Addison's and Crohn's diseases). RESULTS: 34 MG patients had no immunosuppressive drug treatment (MG-0) and 37 patients were under stable immunosuppressive drug treatment since ≥ 6 months (MG+IMM). Serum levels of miR-150-5p and miR-21-5p were higher in the MG-0 patients compared to HC (p<0.0001). Further, miR-150-5p levels were 41% lower and miR-21-5p levels were 25% lower in the MG+IMM compared to MG-0 (p=0.0051 and 0.0419). In the AID patients, mean miR-150-5p and miR-21-5p were comparable with healthy controls (p=0.66). CONCLUSIONS: The immuno-microRNAs miR-150-5p and miR-21-5p show a disease specific signature, which suggests these microRNAs as possible biological autoimmune markers of MG.
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