Expression of Interleukin-17 in Lung and Peripheral Blood of Asthmatic Rats and the Influence of Dexamethasone

The expression of interleukin-17(IL-17) in lung and peripheral blood of asthmatic rats and the influence of dexamethasone,and the role of IL-17 in the pathogenesis of asthma were investigated.Thirty Sprague-Dawley(SD) adult rats were randomly divided into three groups(n=10 in each group):normal group,asthmatic group,and dexamethasone-interfered group.Rat asthmatic model was established by intraperitoneal(i.p.) injection of 10% ovalbumin(OVA) and challenge with 1% OVA via inhalation.Rats in dexamethasone-interfered group were pretreated with dexamethasone(2 mg/kg,i.p.) 30 min before each challenge.The expression of IL-17 protein in serum and bronchoalveolar lavage fluid(BALF) was detected by ELISA.The expression of IL-17 mRNA in peripheral blood mononuclear cells(PBMC) and BALF cells was semi-quantitatively detected by RT-PCR.The expression of IL-17 protein in serum and BALF of asthmatic rats was significantly elevated as compared with normal rats and dexamethsone-interfered rats(P<0.01),and there was significant difference between normal rats and dexamethsone-interfered rats(P<0.05).The expression of IL-17 mRNA in PBMC and BALF cells of asthmatic rats was markedly increased as compared with normal rats and dexamethsone-interfered rats(P<0.01),and significant difference was found between normal rats and dexamethsone-interfered rats(P<0.05).It was concluded that the expression of IL-17 was increased significantly in asthmatic rats and could be inhibited partly by dexamethasone,suggesting that IL-17 might play an important role in the pathogenesis of asthma as an inflammation regulation factor.     

香烟烟雾暴露肺气肿小鼠肺中Th17细胞的变化及可能机制

目的 探讨香烟烟雾暴露肺气肿小鼠肺实质中Th17细胞的变化及其可能机制.方法 将40只雄性Balb/c小鼠按随机数字表法分为4组:对照12周组、对照24周组、烟雾暴露12周组、烟雾暴露24周组,每组10只.香烟烟雾暴露法建立小鼠肺气肿模型.HE染色观察小鼠肺组织的改变,计算平均内衬间隔和肺泡破坏指数;流式细胞术检测小鼠肺实质中Th17细胞、Th1细胞、Th17/Th1细胞、CD4+IL-17+趋化因子受体(CCR)6+T细胞占CD4细胞比例及CCR6+Th17细胞占Th17细胞比例;酶联免疫吸附法(ELISA)检测小鼠肺实质中的白细胞介素(IL)-1β、IL-6、IL-23、转化生长因子(TGF)-β、γ-干扰素(IFN-γ)及趋化因子(CCL)20水平,并分析其相互关系.结果 烟雾暴露12周组和24周组小鼠平均内衬间隔分别为(39±4)μm和(47±7)μm,肺泡破坏指数分别为(39.1±1.6)和(45.2±3.1),明显高于对照12周组[(33±3)μm和(28.2±1.6)]和24周组[(32±4)μm和(28.9±2.1)],以烟雾暴露24周组增高更为显著(均P<0.05);Th17细胞比例分别为(3.27±1.12)和(7.19±2.24)、Th17/Th1细胞比例分别为(0.61±0.30)和(1.82±0.52)、Th1细胞比例分别为(10.02±3.68)和(26.21±6.04)也均高于对照12周组[(1.80±0.75),(0.27±0.12)和(3.75±1.72)]和24周组[(1.99±0.59),(0.28±0.11)和(4.16±1.32)](均P＜0.01),且与平均内衬间隔、肺泡破坏指数呈正相关(r=0.706～0.877,均P＜0.01);CD4+IL-17+CCR6+T细胞比例分别为(0.69±0.34)和(1.11±0.48),CCR6+Th17细胞比例分别为(12.23±2.13)和(18.65±1.17),高于对照12周组[(0.22±0.18)和(6.55±2.13)]和24周组[(0.25±0.17)和(7.29±1.57)],以烟雾暴露24周组增高更为显著(均P＜0.05),其中CCR6+Th17细胞比例与平均内衬间隔和肺泡破坏指数呈正相关(r=0.617、0.741,均P＜0.05);IFN-γ、IL-1β、IL-6、IL-23、TGF-β及CCL20浓度也高于对照12周组和24周组(均P＜0.01),且与Th17细胞比例呈正相关(r=0.394～0.800,均P<0.05).结论 香烟烟雾暴露肺气肿小鼠肺内Th17细胞增高;这可能与IFN-γ、IL-1β、IL-6、IL-23、TGF-β的升高及CCR6/CCL20趋化轴作用有关.

Abstract：

Objective To evaluate the expression of Th17 cell in a cigarette smoke-induced mice model of emphysema and explore the probable mechanisms of its elevation. Methods Forty male Balb/c mice were randomly divided into 4 groups: control group for 12 weeks (C12), control group for 24 weeks (C24), smoke-exposure group for 12 weeks (S12) and smoke-exposure group for 24 weeks (S24)（n=10 each）. Morphological changes were evaluated by mean linear intercepts (Lm) and destructive index (DI). The percentages of Th17, Th1, Th17/Th1, CD4+IL-17+CCR6+T and CCR6+Th17 cells were determined by tetra-color flow cytometry while the levels of interleukin （IL）-1β, IL-6, IL-23, transforming growth factor (TGF)-β, interferon (IFN)-γ and CC chemokine ligand (CCL)-20 assayed by enzyme-linked immunosorbent assay (ELISA). Results The values of Lm [(39±4) μm, (47±7) μm] and DI [(39.1±1.6), (45.2±3.1)] were significantly higher in S12 and S24 than those in C12 [(33±3) μm, (28.2±1.6)] and C24 [(32±4) μm, (28.9±2.1)], particularly in C24 (all P<0.05). The percentages of Th17 cell [(3.27±1.12), (7.19±2.24)], Th17/Th1 cell [(0.61±0.30), (1.82±0.52)] and Th1 cell [(10.02±3.68), (26.21±6.04)] in the lungs of S12 and S24 significantly increased than those in C12 [(1.80±0.75), (0.27±0.12), (3.75±1.72)] and C24 [(1.99±0.59), (0.28±0.11), (4.16±1.32)], particularly in C24 (all P<0.01). The percentages of Th17, Th17/Th1 and Th1 cells in the lungs of S12 and S24 had a positive correlation with Lm and DI (all P<0.01). The percentages of CD4+IL-17+CCR-6+T cell [(0.69±0.34), (1.11±0.48)] and CCR6+Th17 cell [(12.23±2.13), (18.65±1.17)] were significantly elevated in S12 and S24 compared to those in C12 [(0.22±0.18), (6.55±2.13)] and C24 [(0.25±0.17), (7.29±1.57)], particularly in C24 (all P<0.05). Furthermore, a positive correlation between CCR6+Th17 cell and emphysematous lesions was also found (all P<0.05). The levels of IL-1β, IL-6, IL-23, TGF-β, IFN-γ and CCL20 significantly increased in S12 and S24 as compared with those of C12 and C24 (all P<0.05). Meanwhile, the percentage of Th17 cell had a positive correlation with IL-1β, IL-6, IL-23, TGF-β, IFN-γ and CCL20. Conclusion There is an up-regulated expression of Th17 in lungs of cigarette smoke-induced emphysema mice. The CCR6/CCL20 axis and the elevated levels of IL-1β, IL-6, IL-23, TGF-β and IFN-γ may be related with the above effect.     

肾移植术后巨细胞病毒感染对受者远期肾功能的影响

目的 观察肾移植术后外周血单个核细胞(PBMC)转化生长因子β_1,(TGF-β_1)mRNA表达,探讨巨细胞病毒(CMV)感染对远期肾功能的影响和可能机制.方法 选择2000年3月至2005年12月期间手术受者为研究对象,根据术后CMV感染与发病情况,将完成3年随访的96例受者分成3组:A组为有症状的活动性感染(n=33),B组为无症状的活动感染(n=33),C组为无活动性感染(n=30).分析CMV感染、PBMC内TGF-β_1,mRNA表达和血清肌酐(Scr)三者之间关系,对6例肾功能异常者实施移植肾活检术.结果 术后6月3组Scr水平无明显差异(P>0.05),有症状的A组PBMC的TGF-β_1,mRNA表达水平明显较无症状的B组和C组高(均P<0.01),而术后3年A组Scr水平明显较其它两组高(P<0.01),A组有10例(10/33)出现肾功能异常,发生率较B组(3/33)和C组(3/30)显著增高(均P<0.05).3组肾功能异常者(16例)在术后6月PBMC的TGF-β_1,mRNA表达水平较肾功能正常者(80例)明显增高(P<0.01).肾功能异常患者组织病理提示以间质纤维化、肾小管萎缩改变为主,符合慢性移植肾肾病(CAN)的病理改变.结论 肾移植术后有症状CMV感染是诱发CAN的重要因素,TGF-β_1可能介导了移植肾的损伤,早期监测PBMC内TGF-β_1 mRNA表达对防治CAN发生、发展有一定的临床意义.

Abstract：

Objective To evaluate the effect of cytomegalovirus (CMV) infection following kidney transplantation on long-term renal function and its mechanism. Methods Ninety-six patients undergoing kidney transplantation between March 2000 and December 2005, who completed a 3-year follow-up investigation, were divided into 3 groups according CMV-pp65 antigenemia and clinical symptoms. Group A consisted of 33 recipients with symptomatic active CMV infection, group B included 33 with asymptomatic active CMV infection and group C included 30 with inactive infection. The relation of CMV infection, transforming growth factor-β_1 (TGF-β_1) mRNA in the peripheral blood mononuclear cells (PBMCs) and serum creatinine (Scr) were analyzed, and the grafts in 6 cases with renal dysfunction were biopsied. Results The expression of TGF-(β_1 mRNA in PBMCs was significantly higher in group A than in the other two groups 6 months after the transplantation (P<0.01), while Scr levels showed no significant difference between the 3 groups(P>0.05). Three years later, Scr levels in group A were significantly increased as compared with those in the other two groups (P<0.01), and the rate of renal dysfunction in group A (10/33) was significantly higher than those in group B (3/33) and C(3/30) (P<0.05). In the 16 with renal dysfunction, the expression of TGF-β_1 mRNA in PBMCs significantly higher than that in the other 80 patients with normal renal function (P<0.01). Renal allograft biopsies demonstrated mild or severe interstitial fibrosis, tubular atrophy and mononuclear cell infiltration in the 6 patients with renal graft dysfunction, supporting the diagnosis of chronic allograft nephropathy (CAN). Conclusion Symptomatic active CMV infection in renal allograft recipients is an important factor contributing to the occurrence of CAN. Monitoring of TGF-β_1 mRNA expression in PBMCs proves useful in identifying patients at risk of CAN.     

THE PRODUCTION OF INTERLEUKIN-2 BY PERIPHERAL BLOOD MONONUCLEAR CELLS OF HEPATITIS B PATIENTS AND ITS CLINICAL SIGNIFICANCE

The activity of IL-2 produced by activated PBMC in 25 hapatitis B patients including fulminant hepatitis (FH, 6 cases), acute hepatitis (AH, 4 cases), chronic active hepatitis (CAH, 6 cases) and chronic persistent hepatitis (CPH, 9 cases) as well as 11 normal controls was assayed by using splenoblasts as the responding cells. The results showed: (1) The IL-2 activity of all the 25 hepatitis patients were significantly lower than that of 11 normal controls and was lowest in FH patients (P<0.001); (2) The IL-2 activity was correlated with the SGPT activity dynamically in CPH patients (r=-0.4260, P<0.05); (3) The IL-2 activity of hepatitis B patients was related to the positive or negative state of anti-HBc-IgM (P<0. 05); (4) It was the function rather than the number of PBMC that paralleled the IL-2 activity (r<0.3, P>0.05).     

Th17 cells influence intestinal muscle contraction during <Emphasis Type="Italic">Trichinella spiralis</Emphasis> infection

Trichinella spiralis infection in rodents is a well-known model of intestinal inflammation associated with hypermotility. The aim of the study was to use this experimental model to elucidate if Thl 7 cells are involved in the development of gastrointestinal hypermotility. Colonic smooth muscle contractility was investigated in response to acetylcholine. The levels of IL-17, IL-23 and TGF-β1 in colon were measured by Western blotting. Flow cytometric detection of intracellular IFN-7/IL-4/ IL- 17 cytokine production was used to analyze the proportions of CD4＋ T cells subsets in colon. Our results showed that colonic muscle contractility was increased 2 weeks post infection （PI） and stayed high 12 weeks PI when no discernible inflammation was present in the gut. The proportion of Th17 cells and the expression of IL-17 were up-regulated in colon 2 weeks PI and returned to normal 8 weeks PI. The content of IL-17 was correlated with the colonic smooth muscle hypercontracility 2 weeks PI. Meanwhile, TGF-β1 was increased 2 weeks PI, while IL-23 was normal. Our results suggest that Th17 cells affect the colonic muscle contractility in mice infected with Trichinella spiralis at intestine stage but not at muscle stage and the effect of Th17 cells on muscle contractility might be induced by TGF-β1. Other cytokines might be involved in the hypercontracility of colonic smooth muscle at muscle stage.     

Protective Effect of Zengye Decoction(增液汤)on Submandibular Glands in Nonobese Diabetic Mice

Objective: To investigate the protective effect of Zengye Decoction(增液汤, ZYD) on the submandibular glands(SMGs) in nonobese diabetic(NOD) mice. Methods: Twenty-seven female NOD mice were randomly equally divided into 3 groups: the model group, the hydroxychloroquine(HCQ) group, and the ZYD group. Nine C57/B6 mice served as the normal group. After 1-week acclimation, the HCQ and ZYD groups were intragastrically administered with HCQ and ZYD, respectively, and the normal and model groups were administered with normal saline. Changes in the salivary flow rate were observed. Mice from all 4 groups were sacrificed at the age of 20 weeks. The serum and SMGs were collected. Serum cytokines gamma-interferon(IFN-γ), interleukin-10(IL-10) were detected by enzyme-linked immunosorbent assay. Histological changes in the submandibular glands were examined by hematoxylin and eosin staining. The mRNA expression of IFN-γ, IL-10 and vasoactive intestinal peptide(VIP) in the submandibular glands were measured by realtime polymerase chain reaction. Results: Compared with the model group, the salivary flow of the ZYD group significantly increased(P0.05), the extent of the histological changes was ameliorated(P0.05), and the Th1/Th2 cytokine imbalance was remedied(P0.05). In the ZYD-treated mice, the VIP mRNA was up-regulated(P0.05). Conclusions: ZYD is beneficial in protecting structure and function of SMGs in NOD mice. The mechanism may be associated with the correction of the Th1/Th2 cytokine imbalance, and with the prevention of a progressive decline of the VIP level.     

腺病毒介导的"睡美人"转座子与IL-10共表达对NOD小鼠Th17/Treg细胞平衡的影响

目的：观察腺病毒介导的"睡美人"（SB）转座子与白细胞介素10（IL-10）共表达对非肥胖糖尿病（NOD）小鼠脾细胞中Th17/Treg细胞平衡的影响,阐明IL-10对NOD小鼠的可能治疗机制。方法：提取C57BL6小鼠的脾细胞并培养,将脾细胞分为对照组、空载体组和治疗组。对照组脾细胞不做任何处理,空载体组将不含IL-10基因而有转座子序列的腺病毒载体和不含转座酶的腺病毒载体共同感染小鼠脾细胞,治疗组将含有IL-10基因和转座子序列的腺病毒载体以及含有转座酶的腺病毒载体共同感染小鼠脾细胞。感染48 h后RT-PCR法检测各组小鼠脾细胞中IL-10 mRNA表达水平。感染48 h后将上述3组处理的脾细胞分别种植到对照组、空载体组和治疗组NOD小鼠右后腿的腘窝皮下,每组6只小鼠,每周注射1次,共6次。注射结束后4周处死小鼠,ELISA法检测各组NOD小鼠血清中IL-10表达水平;流式细胞术检测各组NOD小鼠脾细胞中CD4+IL-10+、CD4+IFN-γ+、Th17和Treg细胞的比例。结果：与对照组和空载体组比较,治疗组C57BL6小鼠脾细胞中IL-10 mRNA表达水平明显升高（F=72.71,P<0.05）,NOD小鼠血清中IL-10表达水平明显升高（F=8.89,P<0.05）,NOD小鼠脾细胞中CD4+IL-10+细胞和Treg细胞比例明显升高（F=72.09,P<0.05;F=12.98,P<0.05）;但治疗组小鼠脾细胞中Th17细胞比例明显下降（F=6.39,P<0.05）;NOD小鼠脾细胞中CD4+IFN-γ+细胞比例在对照组、空载体组和治疗组之间比较差异无统计学意义（F=2.72,P>0.05）。结论：腺病毒介导的SB转座子与IL-10共表达后可以升高NOD小鼠血清中IL-10表达水平;同时可明显升高NOD小鼠脾细胞中CD4+IL-10+细胞比例,降低Th17细胞比例,升高Treg细胞比例,调控Th1/Th2和Th17/Treg的平衡,对NOD小鼠起到治疗作用。     

IL-17 induces autoantibody overproduction and peripheral blood mononuclear cell overexpression of IL-6 in lupus nephritis patients

Interleukin 17(IL 17)isanewly discoveredcytokineassociatedwithinflammationandautoimmunediseasesandisderivedfromactivatedCD4 + Tcells Thecytokineiscomposedofcovalently boundhomodimerswithamolecularweightof32kDa Mouse ,ratandhumangenomescontainasinglecopyoftheIL 17gene ;itsexpressionistightlyregulated SomebiologicalactivitiesofIL 17wereclarifiedrecently 1,2 　Inapreviousstudy,wefoundthattherewasincreasedexpressionofIL 17inperipheralbloodmononuclearcells (PBMC)andrenaltissue ,andthatIL 17…     

日本血吸虫重组Bb疫苗不同途径免疫BALB/c小鼠不同时间诱导的免疫应答作用

目的: 探讨日本血吸虫重组两歧双歧杆菌(rBb)疫苗不同途径免疫BALB/c小鼠后不同时间诱导的免疫应答作用,阐明该疫苗的免疫应答机制。方法: 将88只BALB/c小鼠随机分为2组,每组44只,分别经皮下注射(皮下注射组,SC组)和鼻腔黏膜(鼻腔黏膜接种组,IN组)接种免疫小鼠,在免疫后0~20周每2周每组随机取4只小鼠,无菌取脾,制备悬浮脾细胞,采用四甲基偶氮唑盐比色法(MTT)检测脾细胞增殖活性,流式细胞仪(FACsort)检测T细胞亚群和脾细胞凋亡率,双抗体夹心ELISA法检测脾细胞上清液中干扰素γ(IFN-γ)、白细胞介素10(IL-10)和白细胞介素17(IL-17)的动态变化。结果: 与免疫0周时比较,SC组小鼠脾细胞增殖活性于免疫后8周达到峰值(P<0.05),IN组小鼠于免疫后4周达到峰值(P<0.05)。与免疫0周时比较,SC组和IN组小鼠CD4⁺T细胞均于免疫后8周达到峰值(P<0.05);CD8⁺T细胞分别于8周和6周达到峰值,但差异无统计学意义(P>0.05)。与免疫0周时比较,2组小鼠脾细胞上清液中IFN-γ水平均于免疫后2周达到峰值(P<0.05),SC组和IN组IL-17水平分别于免疫后14和12周达到峰值(P<0.05)。与免疫0周时比较,SC组小鼠脾细胞凋亡率于免疫后2周达到峰值(P<0.05),IN组于4周达到峰值(P<0.05)。IN组与SC组小鼠各检测指标比较差异均无统计学意义(P>0.05)。结论: 经皮下注射和鼻腔黏膜途径接种的日本血吸虫重组Bb疫苗早期即可诱导小鼠产生有效的免疫应答,以Th1型免疫应答为主,2种免疫途径所诱导的免疫应答无明显差异。     

Th17转录因子RORγt和BATF及Th17相关细胞因子在中性粒细胞亚型哮喘发病中的作用

目的：检测中性粒细胞亚型哮喘（NA）患者痰上清中辅助性T细胞17（Th17）特异性转录因子维甲酸相关核孤儿受体γt（RORγt）、B细胞转录激活因子（BATF）及外周血中Th17细胞相关细胞因子白细胞介素8（IL-8）、白细胞介素17（IL-17）和白细胞介素22（IL-22）表达水平,探讨其在NA发病中的作用。方法：以56例支气管哮喘患者为研究对象,4.5%生理盐水雾化诱导痰,经细胞MGG染色进行哮喘的炎症亚型分型,分为嗜酸性粒细胞亚型哮喘（EA）组（26例）和NA组（30例）,以常规体检者为健康对照组（NC组,28人）。实时荧光定量PCR（RT-PCR）法检测痰上清中BATF和RORγt mRNA表达水平。空腹抽取各组研究对象肘静脉血10 mL,Ficoll密度梯度离心后分离外周血单个核细胞（PBMC）,ELISA法测定血清中IL-8、IL-17和IL-22蛋白表达水平,流式细胞术检测PBMC中Th17细胞（CD4⁺IL-17⁺细胞）的百分率。结果：与NC组和EA组比较,NA组患者血清中IL-8、IL-17和IL-22表达水平均明显升高（P<0.05）;与NC组比较,EA组患者血清中IL-8、IL-17和IL-22表达水平差异无统计学意义（P>0.05）。与NC组和EA组比较,NA组患者痰上清中BATF和RORγt mRNA表达水平明显升高（P<0.01）。与NC组和EA组比较,NA组患者PBMC中Th17细胞百分率均明显升高（P<0.01）;与NC组比较,EA组患者PBMC中Th17细胞百分率差异无统计学意义（P>0.05）。结论：IL-17转录因子RORγt和BATF参与了NA患者气道炎症发生过程,且Th17细胞及其相关细胞因子IL-17和IL-22的异常表达与NA的全身反应有关联。     

梅毒血清固定患者外周血中Th17/Treg细胞、Foxp3和ROR-γt的表达水平及相关性研究

目的 通过检测梅毒血清固定患者外周血Th 17/Treg细胞比例及其特异性转录因子叉头状转录因子3(Foxp3)和维甲酸相关核孤儿受体(ROR-γt)的mRNA表达水平以及相关的细胞因子水平,探讨其与梅毒血清固定免疫机制的关系.方法 采集60例梅毒血清固定患者(观察组)和60例健康对照者(对照组)的外周血,分离单一核细胞(PBMCs),采用流式细胞仪检测Th17和Treg细胞比例;提取总RNA,采用实时荧光定量PCR(QRT-PCR)法检测Foxp3和ROR-γt的mRNA表达水平;采用ELISA法测定PBMCs上清液中IL-17和转化生长因子-β(TGF-β)水平.结果 观察组外周血中的Treg细胞比例[(9.68±1.54)％]、Foxp3的mRNA[(2.85±0.16)％]和TGF-3[(275.15±20.89) pg/ml]的表达水平明显高于对照组[(5.96±1.27)％、(1.96±0.14)％、(156.33 ±41.49) pg/ml];观察组中的Thl7细胞比例[(1.13±0.31)％]、ROR-γt的mRNA[(0.98±0.16)％]和IL-17的表达水平[(12.21 ±4.73) pg/ml]明显低于对照组[(1.98±0.17)％、(1.85±0.15)％、(18.98±6.89) pg/ml],差异有统计学意义(P＜0.05).结论 外周血中Treg和Th17细胞比例的变化、Foxp3和ROR-γtmRNA表达水平的异常与梅毒血清固定的免疫机制相关,梅毒血清固定患者可能存在Treg/Th17的失衡,且向Treg细胞漂移.     

增殖诱导配体mRNA在系统性红斑狼疮患者外周血单个核细胞的表达

目的 检测增殖诱导配体（APRIL）mRNA在系统性红斑狼疮（SLE）患者外周血单个核细胞（PBMC）的表达水平，探讨APRIL在SLE发病中的意义。方法 采用半定量RT-PCR法检测36例SLE患者及17例正常人PBMC的APRILmRNA表达，并与SLE疾病活动指数（SLEDAI）进行相关性分析。结果 SLE患者活动期组和非活动期组APRIL mRNA表达水平均明显高于正常对照组（P〈0．05或P〈0．01），活动期组较非活动期组增高更明显（P〈0．01）；SLE患者APRILmRNA表达水平与SLEDAI评分呈正相关（r=0．6725，P〈0．01）。结论 SLE患者APRILmRNA表达水平的增高，可能在SLE的发病机制中具有重要作用。     

IL-21及其受体在银屑病患者外周血和皮损组织中的表达及意义

目的探讨IL-21及其受体在斑块型银屑病患者外周血PBMC和皮损组织中的表达情况及临床意义。方法采用流式细胞仪检测斑块型银屑病58例患者及20例健康对照者外周血PBMC中IL-21、IL-21R的表达;采用实时定量RT-PCR（quantitative real-time, RT-PCR）法检测25例银屑病和15例正常人外周血PBMCs和皮肤组织中IL-21、IL-21R mRNA的表达情况;采用Western印迹法检测皮肤组织中IL-21和IL-21R的表达情况;采用酶联免疫吸附试验（ELISA）法检测PBMC培养上清液中IL-21的分泌水平。结果流式细胞仪检测发现银屑病患者PBMC中IL-21和IL-21R占CD4+T细胞的百分率明显增加（P<0.01）;Real-time PCR发现IL-21、IL-21R mRNA在银屑病患者的PBMC和皮肤组织中表达均较健康对照者增高（P<0.01,P<0.05）;Western印迹法显示IL-21和IL-21R蛋白在银屑病患者的皮损中表达增高（P<0.01）;ELISA检测发现培养上清中IL-21分泌水平增加（P<0.01）。结论斑块型银屑病患者PBMC和组织中IL-21和IL-21R的表达水平均较健康对照者升高,IL-21可能参与了银屑病的发病过程,并可能成为一个潜在的治疗靶点。     

高龄非甲状腺性病态综合征患者外周血单核细胞的功能变化

目的：探讨高龄非甲状腺性病态综合征（ NTIS）患者外周血单核细胞（ PBMCs）功能的变化。方法根据临床症状、实验室检查和甲状腺激素变化情况,排除原发性或继发性甲状腺疾病后,将住院高龄患者分为甲状腺功能正常组（ A组,40例）、NTIS组（ B组,33例）、NTIS并全身炎症反应综合征（ SIRS）组（ C组,36例）、NTIS并脓毒症组（D组,54例）。用流式细胞仪检测患者PBMCs表面人白细胞抗原－DR（HLA－DR）的表达;用MTT方法检测PBMCs刺激同种异体T淋巴细胞的增殖实验,用ELISA方法检测经内毒素（ LPS）刺激前后PBMCs分泌肿瘤坏死因子－α（TNF－α）、白细胞介素－6（IL－6）、白细胞介素－10（IL－10）等细胞因子的水平。结果与A组比较,B组患者PBMCs表面HLA－DR的表达、刺激同种异体T淋巴细胞的增殖能力、经LPS刺激后分泌TNF－α、IL－6、IL－10细胞因子的水平差异均无统计学意义（ P＞0.05）;与B组比较,C、D两组患者PBMCs表面HLA－DR的表达、刺激T细胞增殖能力以及分泌细胞因子的水平均显著性减低（ P＜0.05）。 D组上述免疫功能指标较C组有下降趋势,但C、D两组之间差异无统计学意义（P＞0.05）。结论甲状腺激素水平减低本身不引起PBMCs功能的变化;SIRS或脓毒症所致NTIS的患者PBMCs功能减低。     

霉酚酸衍生物对人PBMC产生IL-17和IFN-y的抑制作用

目的探讨霉酚酸衍生物（JU95—07B）对人外周血单个核细胞（PBMC）产生IL-17和IFN-1的抑制作用,为临床治疗炎症及自身免疫性疾病提供依据。方法用anti．CD3＋anti．CD28刺激PBMC。酶联免疫吸附法（ELISA）检测加入不同浓度JU95—07B及作用不同时间点的IL-17和IFN-y水平。用流式细胞术（FCM）检测JU95—07B对T细胞不同亚群表达IL．17和IFN-y／的影响。用RT-PCR法测定JU95．07B对IL-17和IFN-1mRNA的作用。结果JU95．07B对anti—CD3＋anti—CD28诱导PBMC产生的IL-17和IFN-y均呈剂量依赖性的抑制,与作用时间有关,早期无明显的抑制现象,12h后开始出现有统计学意义的抑制效果（P〈O．05）,培养时间越长抑制效果越明显。JU95．07B可明显降低CD4’和CD8＋T细胞产生IL-17和IFN-y的比例,对IL-17的抑制率高于IFN-1。此外,JU95—07B抑制IL-17和IFN-1mRNA的表达。结论JU95—07B能有效抑制T细胞产生IL-17和IFN-y。