新生儿胎粪吸入性肺炎血清细胞因子变化的意义

目的探讨血清IL-1β、IL-8、肿瘤坏死因子-α(TNF-α)及胰岛素样生长因子-1(IGF-1)在新生儿胎粪吸入性肺炎(MAS)发病中的作用。方法采用放射免疫法于生后d1、3、7检测32例MAS患儿及15例正常新生儿血清IL-1βI、L-8、TNF-α及IGF-1水平变化。并对IGF-1与IL-βI、L-8、TNF-α水平变化进行相关性分析。结果MAS患儿出生后3 d内血清IL-1β、IL-8、TNF-α明显增高,与对照组比较有显著差异(P<0.01);至生后d7接近正常对照组水平(P>0.05),而IGF-1生后1周内均明显低于正常对照组水平(P<0.01),且病情越重变化越明显,IGF-1与IL-1β、IL-8、TNF-α水平变化呈明显负相关(r=-0.67,-0.61,-0.73 P均<0.01)。结论新生儿MAS患儿血清IL-1βI、L-8、TNF-α及IGF-1水平的变化与MAS的病情轻重密切相关,可作为病情及评估预后的监测指标。     

缺氧缺血性脑病新生儿血清瘦素、胰岛素样生长因子-1、白细胞介素-6和肿瘤坏死因子-α水平的变化

目的研究缺氧缺血性脑病(HIE)新生儿血清瘦素(Leptin)、胰岛素样生长因子-1(IGF-1)I、L-6及TNF-α水平的动态变化的意义。方法选择窒息新生儿45例为HIE组,同期健康新生儿20例为对照组。用酶联免疫吸附试验法测定窒息组、正常对照组、HIE极期、恢复期患儿血清瘦素I、GF-1I、L-6及TNF-α水平。结果新生儿窒息时血清瘦素I、GF-1I、L-6及TNF-α与正常对照组比较均有显著性差异(P均<0.05);除TNF-α外,其他因子与HIE病情程度无关;重度HIE组极期与恢复期瘦素I、GF-1及IL-6比较有显著性差异(P均<0.05),而TNF-α比较无显著性差异(P均>0.05)。结论血清瘦素I、GF-1I、L-6及TNF-α均参与缺氧缺血性脑损伤;血清瘦素I、GF-1和IL-6可能对重度HIE脑细胞功能恢复有作用。     

大剂量地塞米松治疗重型流行性乙型脑炎对脑脊液肿瘤坏死因子-α、白细胞介素-6、8的影响

目的研究流行性乙型脑炎(乙脑)患儿急性期,大剂量地塞米松对脑脊液TNF-αI、L-6、8,体温及GCS评分影响。方法16例重度乙脑患儿随机分为地塞米松组10例,地塞米松针0.5~1.0 mg/(kg.d),分2次;对照组6例,未应用地塞米松。入科后即进行GCS评分,测体温、心率、白细胞计数、CRP,同时检测脑脊液TNF-αI、L-6、8水平,2、3 d后复查脑脊液TNF-αI、L-6、8,复测体温,GCS评分。结果入科时两组GCS评分、体温、白细胞计数,CRP、脑脊液TNF-α、IL-6、8相似(P均>0.05),23、d后地塞米松组脑脊液TNF-αI、L-6I、L-8、体温显著低于对照组,而GCS评分显著高于对照组。结论乙脑患儿急性期静脉应用大剂量地塞米松能抑制颅内炎症反应水平,阻止病情恶化。     

血清炎症因子与新生儿窒息后脑损伤的关系

目的探讨窒息新生儿生后血清高迁移率族蛋白B1(HMGB1)、S100B蛋白(S100B)、白细胞介素-6(IL-6)、肿瘤坏死因子(TNF-α)水平变化与新生儿窒息后脑损伤的关系。方法采用酶联免疫吸附法检测25例窒息新生儿和16例健康新生儿生后3～7天血清HMGB1、S100B、IL-6、TNF-α水平,同时对窒息患儿生后第3～7天进行头颅CT检查,比较轻度窒息组、重度窒息组和对照组血清炎症因子水平,以及窒息组患儿头颅CT异常组和正常组血清炎症因子水平的差异。结果 (1)轻度、重度窒息组血清HMGB1、S100B水平(ng/L)均高于对照组[HMGB1:(15.15±0.13)、(15.30±0.07)比(11.99±0.05),P均<0.01,S100B:(141.65±17.82)、(148.93±26.08)比(126.74±12.97),P均<0.05],重度窒息组血清IL-6水平(ng/L)高于对照组[(0.94±0.22)比(0.72±0.12),P<0.01];轻度与重度窒息组间血清HMGB1、S100B、TNF-α、IL-6比较差异均无统计学意义(P>0.05)。(2)窒息新生儿头颅CT异常患儿出生后3～7天血清HMGB1、S100B、TNF-α、IL-6浓度(ng/L)均明显高于CT正常患儿[HMGB1:(17.14±0.14)比(13.24±0.04),S100B:(147.65±14.03)比(132.16±17.55),TNF-α:(38.46±0.14)比(30.60±0.06),IL-6:(0.89±0.16)比(0.73±0.18),P<0.05]。结论血清HMGB1、S100B、TNF-α、IL-6水平与新生儿窒息后脑损伤密切相关,有助于新生儿窒息后脑损伤的判断。     

颅内感染患儿血清及脑脊液肿瘤坏死因子-α、白细胞介素-1β、白细胞介素-6水平变化的意义

目的探讨肿瘤坏死因子-α(TNF-α)、白细胞介素(IL)-1β、IL-6在儿童颅内感染中的作用。方法采用酶标记免疫吸附分析法(ELISA)双抗体夹心法对25例化脓性脑膜炎(PM)患儿,17例结核性脑膜炎(TM),30例病毒性脑膜炎(VM)及20例正常对照儿童,分别进行血清和脑脊液TNF-α、IL-1β与IL-6水平检测。结果颅内感染患儿脑脊液TNF-α、IL-1β与IL-6水平显著高于血清水平(Pa<0.05),且血清水平与脑脊液水平呈正相关(Pa<0.05)。血清TNF-α与IL-1β在细菌性脑膜炎(BM)组均高于病毒性脑膜炎(VM)组(Pa<0.05);IL-6在PM最高,结核性脑膜炎(TM)、VM次之,与对照组比较均有显著性差异(Pa<0.05)。脑脊液中TNF-α在PM最高,TM次之;IL-1β与IL-6在TM最高,PM、VM次之,与对照组比较均有显著性差异(Pa<0.05)。结论TNF-α、IL-1β、IL-6在颅内感染中起重要作用,对颅内感染的诊断和鉴别诊断有重要意义。     

新生儿缺氧缺血性脑病血清IL-6、TNF-α与NO的动态变化及临床意义

目的　探讨新生儿缺氧缺血性脑病(HIE)外周血IL-6、TNF-α与NO变化的临床意义。方法　分别用放射免疫法与硝酸盐还原酶两点法于生后第1天(24小时内)、3天与7天检测了40例HIE患儿及40例正常新生儿外周血IL-6、TNF-α与NO水平的变化。结果　HIE患儿和正常新生儿生后第1天血清IL-6水平分别为(52.6±24.5)和(80.2±29.4)ng/L(两者比较P<0.01),TNF-α分别为(1.18±0.31)和(0.91±0.30)μg/L(P<0.01),NO分别为(70.3±32.7)和(89.2±35.9)μmol/L(P<0.05),而且病情越重改变越明显。至生后1周IL-6、TNF-α恢复至正常对照组水平,而NO则逐渐增高,至生后1周超过对照组水平(P<0.01)。结论　HIE患儿外周血IL-6与NO水平减低,TNF-α水平升高,它们可能参与了新生儿缺氧缺血性脑损伤的某些发病过程;本研究为HIE的免疫学治疗提供了理论依据。     

正常新生儿血浆中IL-6、IL-8、TNF-α与NO的动态观察

目的探讨正常新生儿脐血、外周血免疫学特点,研究新生儿的免疫学状态.方法以正常成人为对照,采用放射免疫法测定IL-6、IL-8与TNF-α,硝酸盐还原酶两点法测定NO.结果正常新生儿脐血IL-6、IL-8与N0水平明显低于成人,而TNF-α则高于成人水平.正常新生儿外周血IL-6水平在生后一周内无明显变化,显著低于成人血浆含量,而IL-8生后一周内高于成人水平,TNF-α在生后一周内呈逐渐增高趋势,高于成人水平.结论正常新生儿脐血免疫能力不足,生后免疫成熟是一个逐渐的过程,但已具有一定的免疫调节能力.高水平的TNF-α,低水平的IL-8对促进新生儿免疫功能的成熟具有重要意义,但亦可能与新生儿在出生过程中所经历的多种严重应激反应有关.     

过敏性紫癜患儿血清白细胞介素-4、-6、-8及肿瘤坏死因子-α表达的意义

目的 探讨血清白细胞介素(IL)-4、-6、-8及肿瘤坏死因子α(TNF-α)在过敏性紫癜(HSP)患儿中表达及其临床意义.方法 采用ELISA检测45例HSP患儿(其中20例并肾脏损害)及43例健康儿童血清IL-4、-6、-8及TNF-α水平,比较有和无并肾损害HSP患儿及HSP患儿与健康儿童细胞因子水平;分析IL-4、-6、-8与TNF-α是否存在相关关系.结果 1.HSP患儿血清IL-4、-6、-8及TNF-α水平高于健康对照组(P＜0.01);2.无肾损害HSP与紫癜性肾炎(HSPN)组血清IL-4、-6、-8水平均无统计学差异;HSPN组TNF-α水平高于无肾损害HSP组;3.HSP血清TNF-α水平与IL-4无相关(r=0.278 P＞0.05);HSP患儿血清TNF-α水平与IL-8正相关(r=0.524 P＜0.01).HSP患儿血清TNF-α水平与IL-6正相关(r=0.670 P＜0.01).结论 细胞因子IL-4、-6、-8和TNF-α可能参与HSP/HSPN发病过程.     

新生儿细菌感染时IL-8 IL-10 IL-13水平的研究及其临床意义

目的新生儿因处于暂时性的免疫功能低下的状态而容易发生感染性疾病,也是新生儿发病和死亡的重要原因.寻找指标以早期诊断新生儿感染性疾病是临床和研究的重点之一.本研究探讨血清IL-8、IL-10、IL-13水平在新生儿细菌感染的早期诊断和疗效判断中的意义.方法用ELISA测定3组血清各细胞因子的水平.感染组:21例细菌感染的足月新生儿.非感染组:20例非感染性疾病的足月新生儿.脐血组:30例正常足月新生儿.结果感染组IL-8、IL-10和IL-13水平(87.0±82.6,35.1±34.8,23.2±46.2 pg/ml)较非感染组升高(56.6±13.2,21.6±12.9,12.0±32.3 pg/ml)(P<0.05);感染组治疗后IL-8和IL-10水平(51.2±3.1,18.5±3.3 pg/ml)较治疗前下降(P<0.05);非感染组IL-13较脐血组(1.2±0.3 pg/ml)显著升高(P<0.05),IL-8、IL-10在两组间无区别.结论新生儿细菌感染时血清IL-8、IL-10和IL-13显著升高,可做为新生儿细菌感染的参考标志物,而IL-8和IL-10的变化有助于评估新生儿感染的治疗效果.     

重组人活化蛋白C对大鼠急性胃黏膜损伤的保护作用

目的探讨重组人活化蛋白C(rhAPC)对急性胃黏膜损伤的保护机制。方法SD大鼠24只,随机分为四组:A组为正常组,B组为模型组,C组为rhAPC预处理组,D组为生理盐水对照组。采用浸水束缚应激(WRS)的方法制备大鼠急性胃黏膜损伤的模型,C组在WRS开始前半小时通过鼠尾静脉注入rhAPC(100μg/kg),D组在同一时间点注入同等量的生理盐水。计数各组大鼠胃黏膜溃疡指数(UI)。分离胃黏膜上皮细胞,并制成细胞浓度为1×106/ml的单细胞悬液,加入荧光染料DiOC6,上流式细胞仪检测胃黏膜线粒体跨膜电位。采用ELISA法检测各组血清中肿瘤坏死因子(TNF)-α、白介素(IL)-6的浓度。结果B组胃黏膜UI,血清TNF-α、IL-6的浓度均较A组明显升高(P<0.001),胃黏膜线粒体跨膜电位较A组明显下降(P<0.001)。C组胃黏膜UI,血清TNF-αI、L-6的浓度均较B组显著下降(P<0.001),胃黏膜线粒体跨膜电位较B组显著升高(P<0.001)。结论rhAPC可抑制TNF-αI、L-6的释放,抑制线粒体跨膜电位降低,从而对胃黏膜急性损伤起保护作用。     

哮喘患儿血浆白细胞介素-17、-10、-4及干扰素-γ的相关性及其临床意义

目的探讨哮喘患儿血浆IL17、IL10、IL4及IFNγ水平的相关性及其临床意义。方法哮喘患儿22例,正常对照20例。采用双抗体夹心酶联免疫吸附试验(SELISA)检测其血浆IL17、IL10、IL4及IFNγ水平。结果1.哮喘患儿急性期、缓解期血浆IL17均显著低于对照组(P均<0.01);而缓解期血浆IL17明显低于急性期(P<0.05)。2.哮喘患儿急性期血浆IL10显著高于缓解期及对照组(P均<0.01);缓解期与对照组比较无显著差异。3.哮喘患儿缓解期血浆IL4明显低于急性期及对照组(P均<0.05);急性期与对照组之间无显著差异。4.与对照组比较,哮喘患儿血浆IFNγ无明显改变。5.哮喘患儿急性期血浆中IL17、IL10、IL4、IFNγ水平之间均存在显著正相关(P均<0.01)。结论哮喘患儿T细胞因子水平的改变具有特殊性。糖皮质激素对IL17、IL10、IL4的分泌可能具有抑制作用。     

Interleukin-5 and interleukin-8 in relation to eosinophils and neutrophils in nasal fluids from school children with seasonal allergic rhinitis

The objectives of this study were to measure interleukins 5 and 8 (IL-5 and IL-8) in relation to eosinophils and neutrophils, in nasal lavage fluids from 60 school children with allergic rhinitis, and to determine the influence of treatment with a topical steroid (budesonide) on the levels of the two cytokines. Highly sensitive enzyme immunoassays were used to analyze IL-5 and IL-8. IL-5 levels and relative eosinophil counts in nasal lavage fluid increased significantly in patients with allergic rhinitis during the pollen season, compared with values obtained before the start of the season, and decreased significantly after treatment with budesonide. By contrast, no significant changes in IL-8 or neutrophils were found during the pollen season, nor did they decrease following treatment. In the untreated patients, IL-5 levels correlated significantly with eosinophil counts but not with neutrophil counts, whereas IL-8 levels correlated with neutrophil counts but not with eosinophil counts. After budesonide treatment, the correlation between IL-8 and neutrophils remained, and a correlation between IL-8 and eosinophils emerged. These findings support the concepts that IL-5 has a key role in regulating eosinophils and that IL-8 is important for the regulation of neutrophils. Whereas IL-5 and relative eosinophil counts are profoundly affected by topical steroid treatment, IL-8 and neutrophils are not demonstrably affected by such treatment. It is possible that neutrophils, through the release of IL-8, could be chemotactic for eosinophils in steroid-treated patients.     

过敏性紫癜患儿血清白细胞介素-10、白细胞介素-13、白细胞介素-15与C反应蛋白水平变化的意义

目的 分析过敏性紫癜(HSP)患儿急性期与缓解期血清IL-10、IL-13、IL-15、CRP水平变化及各项指标间的相关性,探讨其临床意义.方法 选择2010年9月-2011年5月确诊为HSP的住院患儿40例作为HSP急性期组研究对象,40例患儿经正规治疗2周左右,在皮疹、腹痛、关节肿胀疼痛症状消失后作为缓解期组研究对象.采用EHSA双抗体夹心法检测HSP患儿急性期与缓解期血清IL-10、IL-13、IL-15水平,采用免疫速率散射比浊法检测CRP水平.选取门诊同期体检健康儿童20例作为健康对照组.应用SPSS17.0软件对数据进行统计学分析.结果 1.HSP患儿急性期血清IL-10、IL-13、IL-15和CRP的水平明显高于缓解期组和健康对照组(P＜0.01或＜0.05);缓解期组血清仅IL-13水平显著高于健康对照组(P＜0.05),而IL-10、IL-15及CRP的水平与健康对照组比较差异均无统计学意义(Pa＞0.05);2.HSP患儿急性期血清IL-10、IL-13、IL-15和CRP各项指标间均存在显著相关性.结论 HSP患儿存在IL-10、1L-13、IL-15及CRP的分泌紊乱,其参与了HSP的发病过程.其中IL-10和IL-13可能起到一定保护作用.     

IL-11及其受体在再生障碍性贫血小鼠外周血中的意义

目的 了解再生障碍性贫血(AA)小鼠外周血中IL-11及受体(IL-11R)的含量及其相互之间的关系,进一步探讨(AA)的发病机制,试图为IL-11治疗(AA)提供新的理论依据.方法 免疫法诱导建立AA的动物模型,分别用ELISA法及流式细胞仪分别测定(AA)小鼠外周血中IL-11及IL-11R的水平.结果 试验组大部分AA小鼠血中IL-11及IL-11R的水平发生了变化,其中17/30只小鼠同时存在IL-11及IL-11R水平降低,而13/30只小鼠仅有IL-11R水平的下降.结论 IL-11及IL-11R在AA发病机制中起一定作用.但其发挥作用的原理和过程尚需进一步探讨.     

新生儿肺炎白细胞介素-10、-13与免疫球蛋白的关系

目的　探讨新生儿肺炎白细胞介素 (IL) 10、 13与免疫球蛋白 (Ig)的关系。 方法　采用免疫酶法(ELISA)和速率散射比浊法检测新生儿肺炎患儿血IL 10、IL 13、IgG、IgA、IgM。以C反应蛋白 (CRP)≥ 2 0mg/L作为诊断细菌感染的界限值 ,结合临床资料 ,将肺炎分为 4组进行结果分析。结果　 1.肺炎组 8型常见病毒及支原体特异性IgM阳性 4 0份 (36 .0 % ) ;对照组 30份血清检测均阴性。病毒及支原体感染 (病毒感染 ) 2 3例(2 0 .7% ) ,细菌感染 4 5例 (4 0 .5 % ) ,混合感染 17例 (15 .3% ) ,不明病原感染 (其他感染 ) 2 6例 (2 3.4 % )。 2 .肺炎组IgA、IgM明显高于对照组 (P <0 .0 5 )。其中病毒感染组IgA明显高于其他感染组和对照组 (P <0 .0 5 ) ;IgM含量为细菌感染组显著高于对照组 (P <0 .0 5 )。 3.病毒感染组IgG、IgA、IgM分别与IL 10有显著相关 (P<0 .0 5 )。混合感染组、细菌感染组和对照组IgM分别与其IL 13呈显著相关 (P <0 .0 5 )。结论　新生儿肺炎时 ,IgA是完成抗病毒体液免疫应答的重要成分 ,IL 10对IgA产生具有调节作用 ;IgM能在抗菌性体液免疫机制中发挥重要作用 ,IL 13有助于调节IgM产生     

Urinary cytokine response to asymptomatic bacteriuria in type 1 diabetic children and young adults

It has been reported that urinary interleukin-6 (IL-6) and IL-8 levels are decreased in adult diabetic women with asymptomatic bacteriuria (ASB) when compared with non-diabetic women with ASB. Such impaired cytokine excretion might play a role in the higher prevalence of ASB among diabetic subjects. The aim of this study was to examine the urinary IL profile in children and young adults with type 1 diabetes mellitus (T1DM) with and without ASB. Midstream clean voiding urine samples were collected and cultured from 133 patients with T1DM (age: 15.6 +/- 5.7 yr) and 178 controls (14.1 +/- 4.7 yr) for two consecutive days. ASB was diagnosed in the case of >or=10(5) bacteria/mL. The urinary IL-6 and IL-8 concentrations were determined, and the presence of leukocyturia was also recorded. The prevalence of ASB was 16.5% in diabetic subjects and 2.8% in controls (p = 0.001). There was no difference between the diabetic and the control groups in the prevalence of 'IL-6-uria' (21.9 vs. 18.0%; p = 0.41), but IL-8 was more frequently detectable in the diabetic group (47.4 vs. 27.5%; p = 0.001). In individuals with ASB, the IL-8 level was similar in the diabetic (median: 70.0 pg/mg creatinine) and control group (42.3 pg/mg creatinine; p = 0.8). Indeed, the IL-8 levels were higher in diabetic subjects with ASB as compared with those without it (70.0 vs. <3.1 pg/mg creatinine; p = 0.001), and there was a significant association between the urinary IL-8 concentration and the bacterial count (p = 0.001). Diabetic patients with leukocyturia had higher IL-8 concentration than those without it (20.9 vs. <3.1 pg/mg creatinine; p = 0.003). Weak significant correlation was found between urinary IL-8 and hemoglobin A1c (HbA1c) (r = 0.4; p = 0.002). The sensitivity and specificity of leukocyturia were 50 and 89.9% in the whole population and those of IL-8 were 74.1 and 67.5%, respectively. In diabetic patients, 36.4% of the bacteriuria were gram-negative and 63.6% gram-positive. Our results suggest that diabetic children with ASB mount an IL-8 response to pathogens, which is comparable to non-diabetic children with bacteriuria. Thus, early in the natural history of diabetes, there are no significant changes in the IL response of children with ASB, as previously reported in adults.     

IL-12 P40(-/-)小鼠感染呼吸道合胞病毒后肺部的免疫炎症反应

目的探讨白细胞介素_12(IL_12)在呼吸道合胞病毒(RSV)感染中对机体免疫炎症反应的调节作用。方法对IL_12P40基因敲除小鼠[IL_12P40(_/_)]和BALB/c野生型小鼠(WT)气道灌注RSV(2×106PFUs/小鼠)致感染,在感染后第3天和第7天分别检测气道灌洗液中总炎症细胞的数量和分类、肺组织中的CD3 细胞计数、气道粘液分泌水平及Thl、Th2细胞因子的变化。结果IL_12P40(_/_)小鼠感染RSV后尤其在感染后第7天BALF中总炎性细胞数增加达(136.0±8.8)×107/L,显著高于WT小鼠[(88.8±15.2)×107/L],其中以淋巴细胞升高更为明显;肺组织免疫组化染色显示在小气道和小血管周围CD3 细胞浸润在IL_12P40(_/_)小鼠感染7d组为(113.1±12.3)/10个×400视野,显著高于WT感染7d组为(66.8±7.0)/10个×400视野;大气道粘膜粘液分泌在IL_12P40(_/_)小鼠感染7d组AB/PAS染色阳性物质密度为(0.76±0.12)nl/mm2,显著高于WT小鼠感染7d组的(0.45±0.07)nl/mm2。IL_12P40(_/_)小鼠感染RSV后第7天肺组织匀浆上清中Th2细胞因子IL_5为(3.11±1.05)pg/100μg总蛋白,显著高于WT小鼠的(0.87±0.46)pg/100μg总蛋白,P<0.05;IL_13为(0.32±0.08)pg/100μg总蛋白,显著高于WT小鼠的(0.23±0.03)pg/100μg总蛋白,P<0.05;而Thl细胞因子IFN_γ在这两种小鼠均升高,分别为(6.60±1.63)pg/100μg总蛋白和(5.56±0.85)pg/100μg总蛋白,但相互间差异无显著性,P>0.05。IL_18在IL_12P40(_/_)小鼠感染RSV后第3天显著升高。用单克隆抗体阻断IL_18可以进一步提高IL_12P40(_/_)小鼠感染RSV第7天时气道的炎症和粘液分泌水平,同时也进一步促进IL_13的分泌,但不影响IFN_γ的分泌。结论IL_12缺乏可以加重RSV感染肺部炎症、粘液分泌和Th2免疫反应,IL_18的缺乏对此有协同作用,但两者均不影响IFN_γ的分泌水平。     

Ontogeny of T-helper 1 and T-helper 2 cytokine production in childhood

Compared to adults, infants and young children demonstrate differences in their immune response, indicating that there is maturation or change over time and it is probable that this may be reflected in cytokine production. Cytokine responses have been demonstrated to be different in atopic and non-atopic individuals. In this study, we examined T-helper 1 (Th1) (interferon-γ[IFN-γ]) and T-helper 2 (Th2) (interleukin [IL]-4, IL-5, and IL-13) cytokine release from atopic and non-atopic children in response to the staphylococcal superantigen, staphylococcal enterotoxin B (SEB). In non-atopic and atopic children, IFN-γ, IL-4, and IL-5 release was significantly related to age. Non-atopic children younger than 2 years of age were found to have significantly reduced Th2 (IL-4, IL-5, and IL-13) responses when compared with older, non-atopic children. Atopic children had a reduced IFN-γ response when compared with non-atopics in early childhood; however, the decreased IFN-γ response seen in early childhood did not persist after 10 years. These age-related changes in cytokine production provide further support for the concept that cytokine deviations may determine the natural history of atopic disease during early childhood. In addition, the present study indicates the necessity of age-matched controls when examining children for both Th1 (IFN-γ) and Th2 (IL-4) cytokine release.     

新生儿败血症及败血症休克时血清IL-6、IL-6mRNA表达水平的研究

为探讨血清IL－6水平变化在新生儿败血症中的意义，采用酶免疫吸附法（ELISA）检测正常与严重感染新生儿血清IL－6值，用逆转录聚合酶链反应（RT－PCR）技术测定外周血单个核细胞（PBMC）IL－6mRNA表达情况。结果：血清IL－6水平以败血症休克组最高，败血症组次之，恢复期迅速下降，检测5例败血症新生儿PBMC均见IL－6mRNA表达，而6例对照新生儿中仅3例有IL－6mRNA表达；按百分位数法初步确定血清IL－6≥23ng/L为诊断新生儿血症的参考指标，此批标敏感性为81％，特异性为83％。提示新生儿败血及败血症休克早期血清IL－6水平升高，IL－6mRNA表达增强，与病情，预后有关，早期检测意义较大。