G0S2 and myasthenia gravis: After treatment with DAC, the expression level of the G0S2 gene was upregulated by 20-fold (Figure 8), which means that the expression of G0S2 in MG patients was controlled by the methylation level of G0S2. After demethylation of the G0S2 promoter, the expression level of G0S2 was upregulated.