Effect of high-iodine intake on MBP mRNA expression in cerebrum of filial mice and selenium intervention
Hou, X.-H.; Yang, X.-F.; Sun, X.-F.; Guo, H.-L.; Xu, J.; Chen, X.
Wei Sheng Yan Jiu 34(4): 428-430
2005
ISSN/ISBN: 1000-8020 PMID: 16229266 Document Number: 584933
To study the effect of selenium supplementation on myelin basic protein (MBP) mRNA expression in cerebrum of high-iodine intake filial mice. 135 weanling female Balb/C mice were assigned into 3 groups and given drinking water including different doses of iodine and selenium. Normal control (NC, tap water), high iodine intake group (HI, 3.0 mg/L I of drinking water), high iodine intake and selenium supplementation group I (HI + Se, 3.0 mg/L I + 0.5 mg/L Se of drinking water). All the male and female mice were mated after 4 months later, related indicators of filial mice on 14 day were determined. In filial mice, compared with NC group, serum TT4 decreased significantly in HI groups, TT3 also decreased, and mRNA expression of MBP in cerebrum was down-regulated 27%. The selenium suppleme ntation groups inhibited the decrease of TT4 and TT3, up regulated the m RNA expression of MBP in cerebrum. High-iodine Intake can decrease thyroxine of filial mice, which maybe is the reason for down-regulated m RNA expression of MBP in cerebrum, and selenium can exert some intervention by thyroxine, but need to verify more.