实验性氟中毒对大鼠大脑磷脂含量及其脂肪酸组成的影响

研究实验性氟中毒时大脑各类磷脂含量和脂肪酸组成的变化，探讨氟病时神经系统受损害的发生机制。方法用Ｗｉｓｔａｒ大鼠复制不同程度病理损害的慢性氟中毒模型，用高效液相色谱方法测定各类生物膜性磷脂含量，用气相色谱方法测定各类磷脂脂肪酸构成。结果成功地复制出不同程度氟损害的动物模型；慢性氟中毒大剂量加氟组大鼠脑组织总磷脂含量降低，受影响的磷脂类型是磷脂酰乙醇胺、磷脂酰胆碱和磷脂酰丝氨酸，但各类磷脂脂肪酸构成未发现明显异常。结论摄入过多的氟可蓄积于脑组织中，并干扰大脑的脂质代谢，磷脂含量降低可能与神经细胞亚微结构的变性有关。大脑生物膜性磷脂含量的改变可能是慢性氟中毒时脑损害的机制之一。

Influence of experimental fluorosis on phospholipid content and fatty acid composition in rat brain

Objective To investigate the pathogenesis of brain damage by fluoride intoxication, phospholipid content, and fatty acid composition in rat brain with fluorosis were annlysed. Methods Wistar rats were fed with NaF in various amounts and time periods to produce the animal model with chronic fluorosis. Phospholipid content and fatty acids composition were analysed using high performance liquid chromatography and gas chromatography, respectively Results All animals fed with high amount of fluoride suffered from chronic fluorosis. The total brain phospholipid content was lower in the rat treated with fluoride, which mainly influenced phosphatidylethanolamine, phosphatidylcholin, and phosphatidylserine. No modifications were detected in fatty acid and aldehyde compositions of individual phospholipid classes. Conclusion The metabolism of brain phospholipid might be interfered by fluoride accumulated in brain tissue, which is related with the degeneration of neuron. The changes of brain phospholipid could be involved in the pathogenesis of chronic fluorosis.