Compared to that in the control group, the expression of VEGF-A, VEGF-2R/KDR, VEGF-1R/Flt-1, IGF, HGF, FGF-1, MMP-2, PDGF, e-NOS, Leptin, and SOD-1 were higher in the MG group (Fig. 6). Here, HGF is linked to myasthenia gravis.