【摘要】 目的探讨α-亚麻酸(α-linolenic acid,ALA)对小鼠创伤性脑损伤(traumatic brain injury,TBI)后急性炎症及神经功能的影响。方法将C57BL6/N小鼠分为高ALA饮食组(孕鼠20只,新生鼠88只)和低ALA饮食组(孕鼠20只,新生鼠84只),采用气相色谱法检测两组小鼠脑多不饱和脂肪酸含量;运用控制性皮质撞击建立小鼠TBI模型。采用实时定量聚合酶链反应、酶联免疫吸附法和蛋白质印迹法分别检测TBI后0、4、24、96h两组小鼠炎症因子及细胞标志物表达。运用转轮实验、横木行走实验和场景恐惧实验观察两组小鼠TBI后神经功能恢复情况。结果高ALA饮食组小鼠脑二十二碳六烯酸(docosahexaenoic acid,DHA)含量高于低ALA饮食组[15.48%±1.20%、9.98%±1.10%,P<0.05];高ALA饮食组小鼠TBI后TNF-α和IL-1β、IL-6和CCL12显著低于低ALA饮食组(P<0.05)。高ALA饮食组小鼠TBI 24h后运动功能恢复较低ALA饮食组快。高ALA饮食组小鼠TBI 24 h后认知功能均优于低ALA饮食组。结论增加脑部DHA水平可以减少急性炎症和改善TBI后神经功能恢复。更多还原

【Abstract】 Objective To investigate the effects of α-linolenic acid(ALA) on acute inflammation and neurological functional recovery of mice with traumatic brain injury(TBI). Methods The C57 BL6/N mice were divided into high ALA dietary group(20 pregnant and 88 new-born mice) and low ALA dietary group(20 pregnant and 84 new-born mice)in this study. The contents of polyunsaturated fatty acids in the brain of the two groups were detected by gas chromatography. Mouse TBI model was established by control cortical impact method. The expression levels of inflammatory cytokines and cellular markers of the two groups were detected by reverse transcription-quantitative polymerase chain reaction and enzyme linked immunosorbent assay or Western Blotting at 0, 4, 24 and 96 h after TBI,respectively. The neurological functions were analyzed by the rotarod, beam walk test and fear conditioning experiment.Results The content of brain docosahexoenoic acid(DHA) was significantly higher in the high ALA dietary group than in the low ALA dietary group(15.48±1.20% vs 9.98±1.10%, P<0.05). The expression levels of TNF-α, IL-1β, IL-6 and CCL12 were lower in high ALA groups than in low ALA group after TBI(P<0.05). The motor function recovery 24 h after TBI was faster in the high ALA dietary group than in the lower ALA diet group. The cognitive function 24 h after TBI was better in the high ALA dietary group than in the low ALA group. Conclusion Increasing DHA levels in the brain can reduce acute inflammation and improve neurological function recovery after TBI.更多还原