Comparison of Effects of Yangkyuksanhwa-tang, Palmulgunja-tang and Cheongpyesagan-tang on the Rat Hyperthyroidism Induced by Levothyroxine

Comparison of Effects of Yangkyuksanhwa-tang, Palmulgunja-tang and Cheongpyesagan-tang on the Rat Hyperthyroidism Induced by Levothyroxine Objectives This study‘s object was to observe the comparative effects of Yangkyuksanhwa-tang , Palmulgunja-tang and Cheongpyesagan-tang on the chronic LT4(levothyroxine) induced hyperthyroidism in rats. Methods Six groups, each of 8 rats in group, were used in this study. Saline and distilled water treated rats are intact control group. Hyperthyroidism was induced by daily subcutaneous LT4 300 μ g/kg treatment for 27 days(LT4 control). Since 12th LT4 treatment PTU(propylthiouracil) 10 mg/kg was intraperitoneal injected(PTU group) and aqueous extracts of Yangkyuksanhwa-tang , Palmulgunja-tang and Cheongpyesagan-tang (YS, PG and CS) 500 mg/kg were orally administrated(YS, PG, CS group), once a day for 15 days. The differences in the body, thyroid gland and epididymal fat pad weights, serum T3(tri-iodothyronine), T4(thyroxine), TSH(thyroid-stimulating hormone), thyroid gland and epididymal fat pad histopathology, liver weight, AST(asparte aminotransferase), ALT(alanine aminotransferase) concentrations, hepatic lipid peroxidation, GSH(glutathione), SOD(superoxide dismutase), CAT(catalase) activities, liver histopathology were observed to evaluate effects on hyperthyroidism, liver damages and antioxidant effects. suggest YS, and favorably control the LT4 induced hyperthyroidism and related liver in through modulation of the