RESUMO
OBJECTIVE To prepare the Graves disease (GD) mouse model through porcine thyroid globulin (PTG) injection and investigate the morbidity and stability of the model. METHODS C57BL6/N mice in model group received multi-point subcutaneous injection of PTG 25μg each week,six times in all. After the end of immunization,their heart rate and oxygen consumption were measured and serum triiodothyronine(T3)level was determined every two weeks. A model was considered successful if serum T3 level was higher than x+3s of the control group. Observation of the model lasted 12 weeks. At the 12th week,spleen and thymus gland indices,serum thyroid globulin antibodies and thyroid peroxidase antibodies were measured,and the thyroid glands were taken for pathological observation. RESULTS After six times of immunization,mice in model group showed increased heart rate(P<0.01),oxygen consumption(P<0.01)and T3 level(P<0.01)compared with control group. The morbidity was 77.7%for male mice and 88.8%for females. In addition,T3 level in model group remained higher than that in control group within 12 weeks after immunization. The T3 level tended to decrease in male mice,but remained at a relatively stable higher level in females. CONCLUSION This method is suitable for GD modeling due to its short model-making time,high morbidity and long durability.