GAD1 and type 1 diabetes mellitus: Additionally, miRNA signatures in PBMCs were correlated with autoantibodies in T1DM patients, with increased miR-326 levels correlated with antibodies against glutamic acid decarboxylase (GAD) and tyrosine phosphatase-like protein (IA2) [12,22], and reduced miR-146a levels correlated with antibodies against GAD [21].