大鼠甲醇中毒后体内的甲酸分布

摘要

Objective To investigate concentration and distribution in blood and tissues of form icacid after m ethanol intoxication in rats. Methods The Sprague-Dawley rats were divided into groups for con-trol group and 3-day and 7-day intoxication treatm ent groups. The experim ental groups were adm inis-tered m ethanol by gavage with the initial dose of 8 m L/kg and followed with 4 m L/kg supplem ental dose 24 h later. After 3 days and 7 days later, rats were killed by decapitation. Then sam ples of cardiac blood, liver, kidney, brain, heart and stom ach of each group were collected. Form icacid concentrations were detected by high perform ance liquid chrom atography. Results Form icacid concentrations in tissues were higher than in blood. Com pared with 3-day intoxication group, there was an increase form icacid of concentration in brain and stom ach in 7-day intoxication group, while a decrease in liver and kidney (P<0.05). Conclusion H igh perform ance liquid chrom atography could be used to accurately detect form icacid. As the m etabolite of m ethanol, form icacid accum ulates in rat blood and tissues after intoxication and the concentrations in organs and tissues are obviously higher than in blood.%目的：研究大鼠甲醇中毒后血液及体内主要组织中甲酸的浓度及分布特点。方法将SD大鼠分为对照组、中毒3 d组和中毒7 d组，中毒模型按照首剂量8 mL/kg给予大鼠甲醇灌胃，24 h后给予减半剂量4 mL/kg再次灌胃，在首次灌胃后的3 d和7 d将大鼠引颈处死，采心血并提取肝、肾、脑、心和胃组织，利用高效液相色谱仪检测其中的甲酸含量。结果甲酸在组织中的浓度高于血液中；与中毒3d组比较，中毒7d组脑和胃组织内的甲酸质量浓度有一定的增加趋势，而肝和肾组织中的甲酸质量浓度有所下降（P<0.05）。结论高效液相色谱法可以作为一种准确检测甲酸的定性定量方法。大鼠甲醇中毒后，其代谢产物甲酸在血液及组织中均有蓄积，在器官组织中的蓄积更显著。