There were several interesting genes in our study that showed strong evidence of up-regulation, such as FOS, PTGS2, HMGB2, MMP9, LY96, TTRAP, ANXA3 and CREB1. Among them, FOS, PTGS2, HMGB2, LY96, TTRAP, ANXA3 and CREB1 have never been reported to be associated with GBS. This evidence concerns the gene PTGS2 and Guillain-Barre syndrome.