Objective To study the effect of antigen processing and presentation on abnormal polarization of T cells in thymus tissue in patients with mysthenia gravis(MG).Methods The total RNA was extracted from thymus tissue in 5MG patients(MG group)and 5patients with non-autoimmune disease(control group),and finished first strand cDNA synthesis reaction.Real-time PCR detection was performed in human dendritic and antigen presenting cell PCR array.The data were analyzed by usingΔΔCt method andΔCt values were compared...