title: microRNA-342, microRNA-191 and microRNA-510 are differentially expressed in T regulatory cells of type 1 diabetic patients.
abstract: Regulatory T cells (Tregs) are critical regulators of autoimmune diseases, including type 1 diabetes mellitus. It is hypothesised that Tregs' function can be influenced by changes in the expression of specific microRNAs (miRNAs). Thus, we performed miRNAs profiling in a population of Tregs separated from peripheral blood of five type 1 diabetic patients and six healthy donors. For more detailed molecular characterisation of Tregs, we additionally compared miRNAs expression profiles of Tregs and conventional T cells. Tregs were isolated according to CD3+, CD4+, CD25(hi)+ and CD127- by flow cytometry, and miRNA expression profiling was performed using TaqMan Array Human MicroRNA Panel-1 (384-well low density array). In Tregs of diabetic patients we found significantly increased expression of miRNA-510 (p=0.05) and decreased expression of both miRNA-342 (p<0.0001) and miRNA-191 (p=0.0079). When comparing Tregs and T cells, we revealed that Tregs had significant higher expression of miRNA-146a and lower expression of eight specific miRNAs (20b, 31, 99a, 100, 125b, 151, 335, and 365). To our knowledge, this is the first study demonstrating changes in miRNA expression profiles occurring in Tregs of T1D patients and a miRNAs signature of adult Tregs.
authors: University Cell Immunotherapy Centre, Masaryk University, Brno, Czech Republic; Laboratory of Molecular Pathology, Medical Faculty, Palacky University, Olomouc, Czech Republic.
authors: Renata
authors: R
authors: Hezova
authors: Ondrej
authors: O
authors: Slaby
authors: Petra
authors: P
authors: Faltejskova
authors: Zuzana
authors: Z
authors: Mikulkova
authors: Ivana
authors: I
authors: Buresova
authors: K R Muthu
authors: KR
authors: Raja
authors: Jan
authors: J
authors: Hodek
authors: Jaroslava
authors: J
authors: Ovesna
authors: Jaroslav
authors: J
authors: Michalek
mesh_terms: D000328:Adult; D016000:Cluster Analysis; D003922:Diabetes Mellitus, Type 1 / Q000097:blood / Q000235:genetics*; D005260:Female; D020869:Gene Expression Profiling; D006801:Humans; D008297:Male; D035683:MicroRNAs / Q000235:genetics*; D008875:Middle Aged; D020411:Oligonucleotide Array Sequence Analysis / Q000379:methods; D013601:T-Lymphocytes / Q000378:metabolism; D050378:T-Lymphocytes, Regulatory / Q000378:metabolism*; D055815:Young Adult
chemical_list: C546177:MIRN191 microRNA, human; C546176:MIRN342 microRNA, human; C532745:MIRN510 microRNA, human; D035683:MicroRNAs