Résumé
Objective In order to assess the present status of the prophylaxis and the eliminating process for iodine deficiency disorders (IDD) in Guizhou province. Methods Guiyang, Douyun and Kaili regions were selected as IDD monitoring spots of Guizhou province. In these districts, the monitoring indicators for IDD were determined and compared with those ten years ago. Results From 1999 to 2000 in Guiyang, Douyun and Kaili: (1) Themeansofiodineconcentrationiniodized salt of households were 43.6 mg/kg, 43.2 mg/kg and 45.3 mg/kg, respectively, and the qualified rates were 97.5%, 95.8% and 97.9%, respectively, all of them were obviously higher than those ten years ago (P5 mIU/L were in 18.0%, 21.8% and 20.0% infants, respectively, obviously descended from those ten years ago (P
Résumé
Objective: This experiment was designed to study the change of nitric oxide (NO) content in different parts of brain in rats suffering from iodine deficiency(ID) and hypothyroidism since their fetal period. Methods: Iodine deficiency animal model was made and NO content in hippocampus(HPC), cerebellum (CE) and cortex(CO) were measured by using NO test kit. Results: Urinary iodine and serum T 3?T 4 concentrations significantly decreased and learning-memory capacity was impaired in ID rats. NO content was significantly lower in HPC and CE in ID rats than in control rats.(HPC:11.61?2.31/2.3?1 18 ?mol/g Prot;CE:10.77?5.16/4.70?1.95 ?mol/g Prot).No difference was found in cortex. Conclusion: Iodine deficiency and hypothyroidism since fetal period could affect NO level in rat brain. Different parts of brain have different sensitivity to ID and hypothyroidism.The changes of NO content in hippocampus may contribute to the learning-memory impairment in ID rats.