丙戊酸抑制大鼠创伤性颅脑损伤后炎症反应  被引量:4

Effect of valproic acid on inflammatory response after traumatic brain injury in rats

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作  者:魏冠[1] 林清江[1] 陈炳基 孙文栋[1] 黄晓磊[1] 陈祥荣[2] 陈峻严[2] 

机构地区:[1]福建医科大学附属第二医院急诊科,福建省泉州362000 [2]福建医科大学附属第二医院神经外科,福建省泉州362000

出  处:《中华急诊医学杂志》2017年第3期313-317,共5页Chinese Journal of Emergency Medicine

基  金:福建省自然科学基金项目(2016J01517)

摘  要:目的研究丙戊酸对大鼠创伤性颅脑损伤后脑水肿、神经功能及炎症反应的影响,以探讨丙戊酸对大鼠创伤性颅脑损伤的保护及机制。方法采用改良FeeneyDM法建立大鼠脑外伤(TBI)模型,将54只雄性成年sD大鼠,体质量220-250g,随机(随机数字法)分为3组(n=18):假手术组(Sham),颅脑损伤(TBI)组,颅脑损伤+丙戊酸处理(TBI+VPA)组。其中TBI+VPA组大鼠腹腔注射丙戊酸(每次300mg/kg,12h/次),分别于伤后1、3、7d进行神经行为学评分(mNSS),断颈处死,取骨窗边缘2mm处挫伤脑皮质采用干湿质量法测损伤区脑水含量;免疫荧光测定脑组织中巨噬细胞侵润情况;Western blot检查脑组织炎症因子INF-γ、TNF-α、IL-6表达水平的变化。统计分析采用SPSS13.0进行成组资料方差分析和X2检验。结果与Sham组比较,其余2组脑水含量和神经功能损伤评分升高,脑组织巨噬细胞侵润,炎症因子INF-γ、TNF-α、IL-6表达上调(均P〈0.05);与TBI组比较,TBI+VPA组大鼠创伤后脑水含量明显降低[3d:(80.12±0.59)% vs.(82.14±0.67)%,P=0.04;7d:(74.74±0.72)%绑.(77.93±0.48)%,P=0.01];神经功能评分也相应改善[3d:(10.53±0.32) vs.(11.74±0.48),P=0.02;7d:(7.97±0.32) vs.(10.73±0.42),P=0.01];TBI+VPA组挫裂伤脑组织中巨噬细胞阳性率低于TBI组[(25.93±0.48)% vs.(36.44±0.72)%,P=0.00],脑组织中炎症因子INF-γ、TNF-α、IL-6表达也明显降低(P〈0.05)。结论丙戊酸对大鼠创伤性颅脑损伤具有神经保护作用,其机制可能是通过抑制伤后脑组织中巨噬细胞侵润,降低炎症因子INF-γ、TNF-α、IL-6表达,减轻伤后继发的炎症反应。Objective To investigate the effects and mechanisms of valproic acid on brain edema, neurobehavioral outcome and inflammatory response after traumatic brain injury (TBI) in rats. Methods TBI animal models were established using Feeney' s method. Fifty-four SD male rats, weighting 220-250 g, were randomly divided into 3 groups (n = 18) : sham operation group (group sham), traumatic brain injury group (group TBI) and valproic acid treatment group (group TBI ± VPA) . Experimental rats were treated with valproic acid (300 mg/kg, twice daily) by intraperitoneal injection. Rat behavioral outcomes were measured by modified neurologic severity score (mNSS) tests at day 1, 3, and 7 after TBI. Brain watercontent was measured with wet-dry weight method. The blood cells infiltration into cerebral cortex were tested with immunohistochemistry staining against ED-1 for macrophage. Inflammatory cytokines ( INF-γ, tumor necrosis factor-α, interleukin-6) were measured by Western blotting. The statistical analysis were performed by ANOVA and chi-square tests using the statistical software program SPSS 13.0. Results Compared with the Sham group, the levels of brain edema, mNSS and macrophage cell infihration were significantly increased after TBI ( all P = 0. 00 ) . The expressions of inflammatory cytokines were also increased significantly ( all P = 0. 00 ) . Compared with the TBI group, TBI ± VAP group had significantly lower brain water content [ 3day: (80. 12 ±0.59)% vs. (82. 14 ±0.67)%, P=0.04; 7day: (74.74 ±0.72)% vs. (77.93 ±0.48)%, P=0.01], and mNSS scores β day: (10.53 ±0.32) vs. (11.74 ±0.48), P =0. 02; 7 day: (7. 97 ±0. 32) vs. (10. 73 ±0. 42), P =0. 01 ] . VPA suppressed macrophage cell infiltration into cerebral cortex [ ( 36.44 ± 0. 72 ) % vs. (25.93 ± 0.48 ) % P = 0.00 ] . Meanwhile, VPA inhibited the expressions of inflammatory cytokines ( INF-γ, TNF-α, IL-6) ( P 〈 0.05 ) . Conclusions Treatment wit

关 键 词:创伤性颅脑损伤 丙戊酸 脑水肿 炎症反应 巨噬细胞 神经保护 

分 类 号:R651.15[医药卫生—外科学]

 

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