燃煤型氟中毒仔鼠大脑皮质超微结构改变

目的 复制燃煤型氟中毒仔鼠模型并观察其对大脑皮质超微结构影响.方法 32只SD大鼠随机分为对照组、高氟组；高氟组以地氟病区燃煤烘烤的玉米为主要饲料,复制氟中毒动物模型,饲养6个月后雌雄合笼,取30日龄仔鼠,用氟离子选择电极法检测动物尿、骨及脑氟含量,透射电镜观察动物大脑皮质超微结构改变.结果 高氟组仔鼠尿氟(8.52±1.61) mg/L、骨氟(1 874±544) mg/kg、脑氟(0.74±0.26)mg/kg,含量均明显升高,与对照组仔鼠尿氟(0.98 +0.26) mg/L、骨氟(1 124±395) mg/kg、脑氟(0.36±0.12) mg/kg比较,差异均有统计学意义(P＜0.05或P＜0.01)；高氟组仔鼠体质量(163±11)g、脑组织重量(1.80±0.10)g、脑器官系数(0.011 1±0.0004)明显低于对照组仔鼠( 147±13)g、(1.54±0.11)g、(0.010 5±0.0004)(P＜0.05或P＜0.01)；超微结构显示,与对照组仔鼠比较,高氟组仔鼠大脑皮质神经细胞细胞核染色质边集,核膜局部缺如、突触间隙融合、突触结构模糊不清.结论 燃煤型氟中毒可以引起仔鼠尿、骨、脑氟含量增高,脑组织重量下降,大脑皮质神经细胞超微结构损伤.

Ultrastructure changes in cerebral cortex of offspring rats with coal burning fluorosis

Objective To duplicate the animal model with coal burning fluorosis and to observe the influence of fluorosis on the ultrastructure changes of cerebral cortex. Methods Thirty-two SD rats were randomly divided into a control group and a high-fluoride exposed group.The exposed group were fed with the corn polluted in drying processes by burning coal containing high level of fluoride from the endemic fluorosis area to produce the animal model of fluorosis.After six months,the rats mated and their filial genera...