OBJECTIVETo investigate the effects and the related mechanisms of Jiajian Yunujian (JJYNJ) granules, which were made from traditional Chinese medicinal prescription, on hyperthyroidism graves.

METHODExcept that in the normal group, all mice were injected 350 mcirog x kg x d(-1) L-Thyroxin sodium to establish the hyperthyroidism graves model. The model mice were divided randomly into model control group, 3 different groups of JJYNJ granules at oral dosage of 2.17, 4.33, 8.66 g x kg(-1), every day and thiamazole group at oral dosage of 10 mg x kg(-1) every day, respectively. The body weight, heart/body weight index, heart rate (HR), spontaneous activity and oxygen consumption of all the mice were measured. The serum T3, T4 levels were evaluated with the method of RIA. Meanwhile, the effect of JJYNJ granules and thiamazole on iodine uptake by thyroid was determined by radio-assay.

RESULTJJYNJ granules could improve the symptoms caused by thyroxin, increase body weight (P < 0.05), reduce heart/body weight index, spontaneous activity and oxygen consumption (P < 0.05). The HR of model group was (794.5 +/- 47.8) beats x min(-1), significantly faster than that of normal group (682.5 +/- 116.4) beats x min(-1). Those of low, middle and high JJYNJ granule group were (736.9 +/- 66.6), (742.1 +/- 62.3), (715.8 +/- 102.8) beats x min(-1) respectively, obviously slower than that of model group (P < 0.05). The serum T3, T4 levels of model group were (3.85 +/- 0.960), (234.46 +/- 58.11) microg x L(-1), significantly higher than those of normal group (0.99 +/- 0.30), (65.94 +/- 13.94) microg x L(-1), P < 0.01). Those of middle, high of JJYNJ granule group were (2.57 +/- 0.81), (164.27 +/- 72.63) microg x L(-1) and (2.70 +/- 0.55), (157.26 +/- 35.03) microg x L(-1). Those of thiamazole group were (2.88 +/- 0.59), (172.65 +/- 39.73) miicrog x L(-1). These values were significantly lower than those of model group. Thiamazole could significantly inhibit the iodine uptake in thyroid (P < 0.01), but JJYNJ granules did not block that obviously.

CONCLUSIONJJYNJ granules could significantly improve the symptoms of experimental hyperthyroidism graves. Its mechanisms may be different from that of thiamazole, which is related to inhibiting the synthesis of thyroxin in thyroid.