TGFB1 and myasthenia gravis: Furthermore, our study demonstrated that, when compared with the control group, both the expressions of AchR-Ab, titin-Ab, RyR-Ab, IL-2, IL-10, IFN-γ, and TGF-β and the activity of P-AchE and E-AchE were higher while the expression of CTLA-4 was lower in the MG group (P < .05), indicating the correlation between MG and the expressions of CTLA-4, AchR-Ab, Titin-Ab, RyR-Ab, IL-2, IL-10, IFN-γ, and TGF-β.