Objective This study was aimed to investigate the expression of monocyte chemoattractant protein-1 (MCP-1) and vascular endothelial growth factor (VEGF) mRNA in rats with acute methanol poisoning. Methods Animal models of acute methanol poisoning in rats were duplicated using a plexiglas chamber exposed to a mixture of N2O/O2. Right atrium venous blood of rats were taken at each time point (2 h, 12 h, 24 h,3 d,1 w), and gas chromatography was used to determine the methanol concentration of the rat blood (n=5) . Then got brain tissue to extract total RNA and reverse transcription (n=3) . SYBRGreen real-time PCR was used to monitor the expression of MCP-1 and VEGF mRNA. Results (1) Results of methanol concentration determination:The blood methanol concentration of the low-dose group was significantly increased in comparison with that of the saline control group at 2 h and 12 h time points ( < 0.05) . In the high-dose group, the blood methanol concentration was increased significantly compared with the low-dose group as well as the saline group at 2 h, 12 h and 24 h time points ( < 0.05); (2) The expression of MCP-1 mRNA: The expression level of MCP-1 were significantly enhanced along with the time lapse after acute poisoning,and became most severely at 24 h. The expression levels of MCP-1 have significant differences in groups,of which high-dose group was higher than low-dose group at 2 h, 3 d and 1 w ( <0.05);(3) The expression of VEGF mRNA:The expression level of VEGF was significantly enhanced along with the time lapse after acute poisoning,and became most severely at 24 h. The expression levels of MCP-1 have significant differences in groups,of which high-dose group was higher than low-dose group at 2 h and 12 h ( <0.05) . Conclusion The expression levels of MCP-1 and VEGF mRNA were significantly enhanced, and the degree of poisoning was apparently related with the dose administered. MCP-1 and VEGF might play the important roles in the pathogenesis and progression of brain injured.%目的：观察大鼠急性甲醇中毒后脑组织趋化因子单核细胞趋化蛋白1（MCP-1）及血管内皮生长因子（VEGF） mRNA水平的表达变化.方法健康成年SD大鼠75只，应用通有混合气体（N2O/O2）的密闭有机玻璃箱并灌胃相应剂量甲醇溶液复制急性高剂量甲醇中毒大鼠和急性低剂量甲醇中毒大鼠（n＝5）.分不同时段（2 h，12 h，24 h，3 d，1周）取大鼠右心房静脉血，采用气相色谱法检测大鼠血液的甲醇浓度，取大鼠脑组织进行总RNA提取，经逆转录得cDNA，用SYBRGreen荧光实时定量PCR技术动态定量监测脑组织中MCP-1和VEGF mRNA在急性甲醇中毒后不同时间点表达的变化．结果（1）甲醇浓度检测结果：低剂量组在2 h、12 h的血液甲醇浓度较生理盐水组显著升高（＜0.05），高剂量组在2 h、12 h、24 h的血液甲醇浓度较低剂量组和生理盐水组显著升高（＜0.05），各组在3 d和1周均未测出甲醇；（2） MCP-1 mRNA表达变化：在甲醇中毒后2 h明显升高，24 h达到高峰，各个时间点与对照组比较均有显著性差异（＜0.05），在2 h，3 d和1周高剂量组高于低剂量组；（3） VEGF mRNA表达变化：在甲醇中毒后2 h明显升高，24 h达到高峰，各个时间点与对照组比较均有显著性差异（＜0.05），在2 h和12 h高剂量组高于低剂量组．结论急性甲醇中毒后，MGP-1和VEGF mRNA的表达显著升高，程度与甲醇中毒剂量有关，可能在脑损伤形成和发展过程中起着重要作用.
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