In the high expression group of MEF2C, the following pathways were significantly associated: Asthma, Type I diabetes mellitus, Allograft rejection, Graft versus host disease and Oxidative phosphorylation, while in the low expression group, Homologous recombination, DNA replication, Sulfur metabolism and non-homologous end joining were significantly associated. The gene discussed is MEF2C; the disease is type 1 diabetes mellitus.