CD4 and myasthenia gravis: Thus, in the second part of our study, we put forward and focus our study on the hypothesis “ IFN-γ can induce CD4+CD25− T cells into CD4+CD25+ Tregs in MG patients to make up for the defective function of CD4+CD25+ Tregs from MG patients.” This topic will further reveal the role of IFN-γ in the pathogenesis of MG patients, providing theoretical and scientific basis for clinical further targeting treatment of MG.