病毒性脑炎患儿血清及脑脊液TNFα、IL6、NSE的变化及其临床

作者:安涛,郭晓清,蒲秀红,李茜,吴琼,谭焱兰,李鸿雁。

【摘要】   目的 探讨病毒性脑炎儿童血清脑脊液TNFα、IL6、NSE的动态变化及其临床意义。方法 66例病毒性脑炎患儿进行血清脑脊液TNFα、IL6、NSE的测定,另有10名临床排除中枢神经系统感染的儿童作为对照组,也进行血清脑脊液TNFα、IL6、NSE测定。TNFα、IL6应用ELISA法检测。NSE用放射免疫法进行测定。结果 病毒性脑炎血清脑脊液TNFα、IL6、NSE水平均明显增高,较对照组有显著统计学差异(P0.01);脑脊液中TNFα、IL6、NSE水平血清中TNFα、IL6、NSE水平呈正相关[r(TNFα)=0.338,P0.01;r(IL6)=0.256,P0.01;r(NSE)=0.374,P0.01];病毒性脑炎血清脑脊液中IL6与NSE水平之间无相关性[r(s)=0.108,P0.05;r(csf)=0.145,P0.05],TNFα与NSE水平有直线相关性[r(s)=0.387,P0.01;r(csf)=0.401,P0.01]。结论 脑脊液血清中NSE可作为判断病毒性脑炎患儿脑组织损伤的客观指标之一,TNFα、IL6参与了儿童病毒性脑炎的病理过程,血清脑脊液中TNFα、IL6水平检测对儿童病毒性脑炎的诊断有一定临床意义

【关键词】 病毒性脑炎儿童;神经元特异性烯醇化酶;肿瘤坏死因子α;白介素6。

Abstract: Objective To study the changes in tumor necrosis factor (TNF)α, interleukin (IL)6 and neuronspecificenolase (NSE) levels in serum and cerebrospinal fluid of children with viral encephalitis and their clinical significance. Methods The TNFα, IL6 and NSE levels in the serum and cerebrospinal fluid of 66 children with viral encephalitis were measured, and another 10 children without central nervous system infection were selected as controls. The TNFα and IL6 levels were measured with ELISA and the NSE levels with radioimmunolgical method.Results The TNFα, IL6 and NSE levels in the serum and cerebrospinal fluid of the viral encephalitis group increased significantly at acute stage, and there were significant deferences between viral encephalitis group and the control group (P0.01). There were positive correlations on TNFα, IL6 and NSE levels between in serum and in cerebrospinal fluid in the viral encephalitis group[r(TNFα)=0.338, P0.01; r(IL6)=0.256, P0.01; r(NSE)=0.374, P0.01]. There was no correlation between the levels of IL6 and NSE in serum or in cerebrospinal fluid in the viral encephalitis group [r(serum)=0.108, P0.05; r(cerebrospinal fluid)=0.145, P0.05]. There was positive correlation between the levels of TNFα and NSE in serum or cerebrospinal fluid in the viral encephalitis group [r(serum)=0.387, P0.01; r(cerebrospinal fluid)=0.401, P0.01].Conclusion NSE level in cerebrospinal fluid or serum may be used as an objective standard reflectiong the degree of brain injury. TNFα and IL6 play roles in the pathogenesis of encephalitis in children. The measurement of TNFα and IL6 levels is valuable for judging the seriousness of virus encephalitis in children.

Key words: viral encephalitis; children; neuronspecificenolase; tumor necrosis factorα;interleukin6。

病毒性脑炎是儿科临床常见的各种病毒引起的中枢神经系统感染性疾病。其发病过程涉及多种细胞因子及酶学的改变。神经元特异性烯醇化酶(neuronspecificenolase,NSE)是衡量中枢神经系统损伤的指标, 脑损伤时神经细胞受损、变性和崩解,血脑屏障通透性增高,该酶即被释放入脑脊液和血液中,致血液中NSE含量增高,故其改变反映了中枢神经系统的病理变化[1],免疫活性细胞产生的炎性细胞因子如白细胞介素 6(IL6)、肿瘤坏死因子 α(TNFα)等在机体抗感染、凝血、发热、休克、恶病质等多种病理生理过程中的作用已越来越明显,其抗病毒及免疫调节作用也引起医学界的广泛关注。本研究即对病毒性脑炎患儿进行了血清脑脊液中TNFα、IL6、NSE水平测定,旨在评价其对于病毒性脑炎临床意义

1 对象和方法。

1.1 对象。

选择2005年8月—2008年3月我院儿科收治的66例病毒性脑炎患儿,其中男38例,女28例,年龄3个月~10岁,均符合病毒性脑炎的诊断标准[2],另有10名有腰穿指征的但临床排除中枢神经系统感染的儿童作为对照组,亦进行血清脑脊液TNFα、IL6、NSE测定。其中男6例,女4例,年龄3个月~10岁。两组的一般临床资料,包括性别、年龄、民族等经统计学处理差异均无统计学意义。

1.2 方法。

1.2.1 标本采集及检测。

所有对象于入院24 h 内收集血清脑脊液标本,疑颅内压高者给予20%甘露醇1 g/kg 快速静点,30 min 后腰穿。标本立即进行常规生化等检查,并留取脑脊液血清各2ml,室温下2 000 r/min 离心10 min,取上清液—20 ℃ 冰箱保存待检。用酶联免疫吸附法(ELISA)测定TNFα、IL6含量,试剂盒购自北京晶美生物制剂公司,按说明书操作。NSE用放射免疫法进行测定。NSE试剂盒购自北京北方生物技术研究所,用放免法测定

1.2.2 统计学方法。

数据采用Stata4.0软件包完成统计处理。数据均用x±s表示;计量资料显著性测定采用t检验。相关分析用直线相关分析,P0.05为有统计学意义。

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