AIM: To study the effect of Cl C-3 gene over-expression on thyroid structure and function in mice.METHODS: Three-months-old FVB mice were used to study the difference of thyroid structure and function between wildtype( WT) mouse and Cl C-3 transgene mice. The expression and distribution of Cl C-3 in the thyroid of mice were determined by the methods of q PCR,Western blot and immunofluorescence. Behavioral monitoring was performed on the daily activities of mice. Serum concentrations of total triiodothyronin...