PTPRN and pancreatic insulinoma: MiRNAs pertaining to autoantibodies, such as insulin autoantibodies (IAA), islet cell cytoplasmic antibodies (ICA), insulinoma-associated 2, or protein tyrosine phosphatase antibodies (IA-2), zinc transporter8 (ZnT8), and glutamic acid decarboxylase (GAD65), trigger pancreatic T cells to initiate insulitis.