Analysis for expression and significance of interleukin-17, RORγt in CD4+ T cells from patients with ankylosing spondylitis

Objective To study the expression of IL-17, RORγt in CD4+T cells from patients with ankylosing spondylitis (AS). Methods The specimens of venous blood PBMC were collected from 28 patients with AS and 15 healthy subjects. Intracellular flow cytometry detection of IL-17 was established after isolation of human CD4+ T cells from PBMC. The expression level of IL-17, RORγt mRNA in CD4+ T cells was determined from 28 AS patients and 15 healthy controls by real-time fluorescence quantitative RT-PCR using Anti -CD3/Anti -CD28 as stimulators or not. Analysis of variance and Pearson correlation were selected. Results The isolation of human CD4+ T cells from PBMC was effective and its purity reached 90%. The percentage of intracellular IL-17 in CD4+ T cells from AS pati-ents in the AS active group was higher than that of the AS stable group and healthy control group (P<0.01). The expression level of IL-17, RORγt mRNA in CD4+ T cells was significantly higher in patients with AS than in controls. After stimulated with anti-CD3/ anti-CD28 stimulation, the percentage of IL-17, RORγt mRNA was increased significantly (P<0.01). The percentage of IL-17, RORγt mRNA in the 12 h group was higher than that of the 24 h group, while both of them were higher than those without stimulation (P<0.05). Conclusion There is an abnormal expression of IL-17, RORγt in human CD4+ T cells from AS patients. Our results indicate that the abnormal expression of IL-17 might play a role in the development and progression of AS.     

Analysis for expression and significance of interleukin-17, RORγt in CD4+ T cells from patients with ankylosing spondylitis

Objective To study the expression of IL-17, RORγt in CD4+T cells from patients with ankylosing spondylitis (AS). Methods The specimens of venous blood PBMC were collected from 28 patients with AS and 15 healthy subjects. Intracellular flow cytometry detection of IL-17 was established after isolation of human CD4+ T cells from PBMC. The expression level of IL-17, RORγt mRNA in CD4+ T cells was determined from 28 AS patients and 15 healthy controls by real-time fluorescence quantitative RT-PCR using Anti -CD3/Anti -CD28 as stimulators or not. Analysis of variance and Pearson correlation were selected. Results The isolation of human CD4+ T cells from PBMC was effective and its purity reached 90%. The percentage of intracellular IL-17 in CD4+ T cells from AS pati-ents in the AS active group was higher than that of the AS stable group and healthy control group (P<0.01). The expression level of IL-17, RORγt mRNA in CD4+ T cells was significantly higher in patients with AS than in controls. After stimulated with anti-CD3/ anti-CD28 stimulation, the percentage of IL-17, RORγt mRNA was increased significantly (P<0.01). The percentage of IL-17, RORγt mRNA in the 12 h group was higher than that of the 24 h group, while both of them were higher than those without stimulation (P<0.05). Conclusion There is an abnormal expression of IL-17, RORγt in human CD4+ T cells from AS patients. Our results indicate that the abnormal expression of IL-17 might play a role in the development and progression of AS.     

Sodium selenite ameliorates dextran sulfate sodiuminduced chronic colitis in mice by decreasing Th1, Th17, and γδT and increasing CD4(+)CD25(+) regulatory T-cell responses

AIM To assess the effect of sodium selenite on the severity of dextran sulfate sodium(DSS)-induced colitis in C57BL/6 mice.METHODS Mice were randomly divided into four groups(n = 10/group): normal group, selenium(Se) group, chronic colitis group, and Se + chronic colitis group. The mice were sacrificed on day 26. Survival rates, clinical symptoms, colon length, and histological changes were determined. The percentages and absolute numbers of immune system cells in the lamina propria lymphocytes(LPL) of the colon, the expression of m RNA in colon tissue, and the concentrations of Th1, Th17, and Treg cytokines in LPL from the large intestine, were measured.RESULTS Se significantly ameliorated the symptoms of colitis and histological injury(P 0.05 each), increasing the proportions of neutrophils and CD4+ CD25+ T cells(P 0.05 each) and decreasing the proportions of γδT cells, CD4+, CD4+CD44+, and CD4+ CD69+ T cells in LPL(P 0.05 each). Moreover, Se reduced the expression of IL-6, IFN-γ, IL-17 A, IL-21, T-bet, and RORγt(P 0.05 each), but enhanced the expression of IL-10 and Foxp3(P 0.05 each). CONCLUSION These results suggest that Se protects against DSSinduced chronic colitis perhaps by increasing the number of CD4(+)CD25(+) Tregs that suppress the secretion of proinflammatory cytokines and populations of Th1, Th17, and γδT cells.     

The involvement of IL-23/Th17 pathway in mice virus myocarditis inducedby cosakievirus B3

Background The IL-23/ Th17 pathway plays an important role in the development of chronic in? ammatory diseases and autoimmune diseases.However,the role of the IL-23/Th17 axis in the regulation of virus myocarditis is still largely unknown.We aim to determine the role of IL-23/ Th17 axis in virus myocartidis.Methods and Results Balb/c male mice were peritoneally injected with 100TICD50 Coxsackie virus B3 to establish virus myocarditis(VMC), mice injected with PBS peritoneally were taken as the controls. 0,1,2,3,4 and 6 weeks After injection,IL-23,L-17 and RORγt mRNA in the myocardium of VMC were assessed by Semi-quantitative RT-PCR,and IL-23 protein from plasm was evaluated by ELISA.Flow cytometric analysis was used to evaluate the frequencies of Th17 subsets in CD4,To investigated whether the IL-23 is important during IL-23/Th-17 pathway challenge,we isolated CD4 + T cells and cultured with rIL-23 in vitro,and examined the Th17 cells.Results show that,comparing with the controls,IL-23,IL-17 and RORγt mRNA was steadly expressed in the myocardiums of infected mice from 1 week after virus injection.Conclusions IL-23/ Th-17 pathway may therefore play an essential role in VMC. Comparative studies are required to reveal further the roles of these cytokines in the pathogenesis of? these immune-related diseases.     

CD4+白细胞介素-17+辅助性T细胞对香烟暴露小鼠肺部炎症及肺气肿的作用

Objective To evaluate the expression and the role of Th 17 in cigarette smoke-induced lung inflammation and emphysema in mice.Methods Forty male BALB/c mice were randomly divided into 4 groups, including a control group C12, a control group C24, a smoke-exposure 12 week group (S12) and a smoke-exposure 24 week group S24 (n = 10 each).Morphological changes were evaluated by mean linear intercepts and destructive index (DI).The proportion of CD4+ IL-17 + Th17, CD4+ IFN-γ+ Th1, CD4+ IL-17 +IFN-γ+ T( Th17/ Th1 ), CD8+ IFN-γ+ Tc1, CD8+ IL-21R + and CD4+ IL-17 + IL-21 + T cells in lungs of mice was determined by flow cytometry.The mRNA expressions of RORγt and IL-17 were evaluated by real-time PCR.Results Mean linear intercepts and DI were significantly higher in S12 and S24 groups [(39 ± 4)μm, (47 ±7) μm], (39.1 ± 1.6, 45.2 ±3.1 ) as compared to C12[(32 ±4) μm,28.2 ± 1.6] and C24groups [(33 ± 3 ) μm ,28.9 ± 2.1], all P ＜ O.05.The percentage of Th17 of S12 and S24 groups [(3.3 ±1.1 )%, (7.2 ±2.2)%] was significantly increased as compared with that of C12 and C24 groups [( 1.8± 0.8) %, (2.0 ± 0.6) %], all P ＜ 0.05.The mRNA levels of RORγt [( 25 ± 4), ( 35 ± 3 )] and IL-17 [(26 ± 3), (36 ± 3 )] in S12 and S24 groups were higher than in C12 [(10 ± 5 ), (13 ± 5 )] and C24 groups [( 11 ± 7 ), (8 ± 6)], all P ＜ 0.05.The percentage of Th 1, Th17/Th1 and Tc1 cells of S12 and S24 groups [(10.0 ±3.7)%, (26.2 ±6.0)%], [(0.61 ±0.30)%, (1.82 ±0.52)%], [(17.0±4.5 ) %, ( 26.8 ± 8.5 ) %] was significantly increased as compared with that of C12 [( 3.8 ± 1.7 ) %,(0.27±0.17)%, (4.8 ±1.9)%] and C24 groups [(4.2±1.3)%, (0.28±0.11)%, (5.2±1.0)%], all P＜0.05.Moreover, the frequency of Th17 cells had a positive correlation with Th1, Tc1 cells and emphysematous lesions ( r =0.519 - 0.797, all P ＜ 0.01 ).In addition, a positive correlation between Th17/Th1 cells and emphysematous lesions was also found (r =0.742, 0.802, all P ＜0.01 ).The percentage of CD4+ IL-17+ IL-21 +T cells was significantly increased in S12 and S24 groups [(0.19 ±0.04) %, (0.55 ± 0.24) %] compared to controls [(0.07 ± 0.03 ) %, (0.08 ± 0.03 ) %], all P ＜ 0.05.Meanwhile, as compared with that of the controls [( 1.22 ± 0.31 ), ( 1.34 ± 0.18 )], the percentage of CD8+ IL-21 R + T cells was also increased in SI 2 and S24 groups [( 2.94 ± 1.26 ), (4.12 ± 2.26 )], but there were no differences among smoke-exposure groups ( P ＞0.05 ).The frequency of CD4+ IL-17 + IL-21 + T cells had a positive correlation with Th 1, Tc1 cells and emphysematous lesions (r = 0.694 -0.754, all P ＜0.05).And the frequency of CD8+ IL-21R+ T cells also had a positive correlation with emphysematous lesions ( r = 0.516, 0.725, all P ＜ 0.05).Conclusions Cigarette smoke increased the expression and the activity of Th17 in mice.Th17 may play a potential (active) role in the development of lung inflammation through IL-21/IL-21R pathway.     

CD4+白细胞介素-17+辅助性T细胞对香烟暴露小鼠肺部炎症及肺气肿的作用

目的 观察香烟烟雾暴露小鼠肺实质中CD4+白细胞介素(IL)-17+辅助性T细胞(Th17)数量及活性的表达,探讨其在香烟暴露小鼠肺部CD4+ γ-干扰素+(Th1)炎症及肺气肿中的作用及相关机制.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(C12)组、对照24周(C24)组、烟雾暴露12周(S12)组、烟雾暴露24周(S24)组,每组10只.香烟烟雾暴露法建立小鼠肺气肿模型.HE染色观察小鼠肺气肿的改变,计算平均内衬间隔和肺泡破坏指数(DI);流式细胞术检测小鼠肺实质中CD4+IL-17+T(Th17)细胞、CD4+γ-干扰素+T(Th1)细胞、CD4+IL-17+γ-干扰素+T(Th17/Th1)细胞、CD8+γ-干扰素+T(Tc1)细胞、CD8+IL-21R+细胞及CD4+IL-17+IL-21+细胞比例;荧光定量PCR法检测小鼠肺实质中维甲酸相关孤独受体(RORγt)和IL-17的mRNA表达,并分析这些指标的相互关系.结果 S12组和S24组的平均内衬间隔[(39±4)μm和(47±7)μm]和DI(39.1±1.6和45.2±3.1)明显高于C12组[(32±4)μm和28.2±1.6]和C24组[(33±3)μm和28.9±2.1],且以S24组的增高更为明显,差异均有统计学意义(t值为4.378～15.188,均P＜0.05);S12组和S24组Th17细胞比例[(3.3±1.1)%和(7.2±2.2)%]均明显高于C12组和C24组[(1.8±0.8)%和(2.0±0.6)%];S12组和S24组RORγtmRNA表达量[(25±4)和(35±3)]及IL-17的mRNA表达量[(26±3)和(36±3)]亦明显高于C12组[(10±5)和(13±5)]和C24组[(11±7)和(8±6)],以S24组增高更为明显,差异均有统计学意义(P＜0.05);S12组和S24组Th1细胞比例[(10.0±3.7)%和(26.2 ±6.0)%]、Th17/Th1细胞比例[(0.61±0.30)%和(1.82±0.52)%]及Tc1细胞比例[(17.0±4.5)%和(26.8±8.5)%]均明显高于C12组[(3.8±1.7)%、(0.27±0.17)%和(4.8±1.9)%]和C24组[(4.2±1.3)%、(0.28±0.11)%和(5.2±1.0)%],以S24组增高更为明显,差异均有统计学意义(P＜0.05);S12组和S24组小鼠Th17细胞与Th1、Tc1细胞比例、平均内衬间隔、DI值均呈显著正相关(r值为0.519～0.797,均P＜0.01);Th17/Th1细胞比例与平均内衬间隔、DI值呈显著正相关(r值分别为0.742和0.802,均P＜0.01);S12组和S24组CD4+IL-17+IL-21+细胞比例[(0.19±0.04)和(0.55±0.24)]明显高于C12组和C24组[(0.07±0.03)和(0.08±0.03)],S24组增高更为明显,差异均有统计学意义(P＜0.05).S12组和S24组的CD8+IL-21R+细胞比例[(2.94±1.26)和(4.12±2.26)]高于C12组和C24组[(1.22±0.31)和(1.34±0.18)](P＞0.05);S12组及S24组小鼠CD4+IL-17+IL-21+细胞比例与Th1、Tc1细胞比例、平均内衬间隔和DI值均呈显著正相关(r值为0.694～0.754,均P＜0.05);S12及S24组小鼠CD8+IL-21R+细胞比例与平均内衬间隔和DI呈显著正相关(r值分别为0.516和0.725均P＜0.05).结论 香烟暴露导致肺气肿小鼠肺内Th17细胞数量及活性上调,并随烟雾暴露时间延长而增强;Th17细胞通过IL-21及IL-21R在肺部Th1/Tc1炎症中起重要促进作用;这对探讨COPD肺部炎症和肺气肿发生机制以及新的治疗靶点具有重要意义.

Abstract：

Objective To evaluate the expression and the role of Th 17 in cigarette smoke-induced lung inflammation and emphysema in mice.Methods Forty male BALB/c mice were randomly divided into 4 groups, including a control group C12, a control group C24, a smoke-exposure 12 week group (S12) and a smoke-exposure 24 week group S24 (n = 10 each).Morphological changes were evaluated by mean linear intercepts and destructive index (DI).The proportion of CD4+ IL-17 + Th17, CD4+ IFN-γ+ Th1, CD4+ IL-17 +IFN-γ+ T( Th17/ Th1 ), CD8+ IFN-γ+ Tc1, CD8+ IL-21R + and CD4+ IL-17 + IL-21 + T cells in lungs of mice was determined by flow cytometry.The mRNA expressions of RORγt and IL-17 were evaluated by real-time PCR.Results Mean linear intercepts and DI were significantly higher in S12 and S24 groups [(39 ± 4)μm, (47 ±7) μm], (39.1 ± 1.6, 45.2 ±3.1 ) as compared to C12[(32 ±4) μm,28.2 ± 1.6] and C24groups [(33 ± 3 ) μm ,28.9 ± 2.1], all P ＜ O.05.The percentage of Th17 of S12 and S24 groups [(3.3 ±1.1 )%, (7.2 ±2.2)%] was significantly increased as compared with that of C12 and C24 groups [( 1.8± 0.8) %, (2.0 ± 0.6) %], all P ＜ 0.05.The mRNA levels of RORγt [( 25 ± 4), ( 35 ± 3 )] and IL-17 [(26 ± 3), (36 ± 3 )] in S12 and S24 groups were higher than in C12 [(10 ± 5 ), (13 ± 5 )] and C24 groups [( 11 ± 7 ), (8 ± 6)], all P ＜ 0.05.The percentage of Th 1, Th17/Th1 and Tc1 cells of S12 and S24 groups [(10.0 ±3.7)%, (26.2 ±6.0)%], [(0.61 ±0.30)%, (1.82 ±0.52)%], [(17.0±4.5 ) %, ( 26.8 ± 8.5 ) %] was significantly increased as compared with that of C12 [( 3.8 ± 1.7 ) %,(0.27±0.17)%, (4.8 ±1.9)%] and C24 groups [(4.2±1.3)%, (0.28±0.11)%, (5.2±1.0)%], all P＜0.05.Moreover, the frequency of Th17 cells had a positive correlation with Th1, Tc1 cells and emphysematous lesions ( r =0.519 - 0.797, all P ＜ 0.01 ).In addition, a positive correlation between Th17/Th1 cells and emphysematous lesions was also found (r =0.742, 0.802, all P ＜0.01 ).The percentage of CD4+ IL-17+ IL-21 +T cells was significantly increased in S12 and S24 groups [(0.19 ±0.04) %, (0.55 ± 0.24) %] compared to controls [(0.07 ± 0.03 ) %, (0.08 ± 0.03 ) %], all P ＜ 0.05.Meanwhile, as compared with that of the controls [( 1.22 ± 0.31 ), ( 1.34 ± 0.18 )], the percentage of CD8+ IL-21 R + T cells was also increased in SI 2 and S24 groups [( 2.94 ± 1.26 ), (4.12 ± 2.26 )], but there were no differences among smoke-exposure groups ( P ＞0.05 ).The frequency of CD4+ IL-17 + IL-21 + T cells had a positive correlation with Th 1, Tc1 cells and emphysematous lesions (r = 0.694 -0.754, all P ＜0.05).And the frequency of CD8+ IL-21R+ T cells also had a positive correlation with emphysematous lesions ( r = 0.516, 0.725, all P ＜ 0.05).Conclusions Cigarette smoke increased the expression and the activity of Th17 in mice.Th17 may play a potential (active) role in the development of lung inflammation through IL-21/IL-21R pathway.     

系统性红斑狼疮患儿外周血辅助性T17细胞表达的初步研究

目的 观察系统性红斑狼疮(SLE)患儿外周血辅助性T17(Th17)细胞表达变化,探讨Th17细胞及其相关的细胞因子在SLE患儿发病中的作用.方法 以15名健康儿童为健康对照组,流式细胞术(FCM)检测25例SLE患儿(SLE组)外周血Th17细胞百分率,用酶联免疫吸附试验(ELISA)法检测外周血血浆白细胞介素(IL)-17、IL-21水平,分析Th17细胞与SLE活动度之间的关系.统计学处理采用t检验和Spearman相关性检验.结果 与健康对照组相比,SLE患儿外周血中CD3+CD8-IL-17+T细胞的频率[(1.24±0.64)%,(0.59±0.21)%],CD3+CD8-IL-21+T细胞的频率[(1.5±0.6)%,(0.8±0.4)%]明显增高,P均＜0.01;血浆中IL-17,IL-21水平明显升高(P＜0.01).CD3+CD8-IL-17+T细胞频率与疾病活动度相关(r=0.732,P＜0.01),CD3+CD8-IL-21+T细胞频率与疾病活动度无相关性(r=-0.002,P＞0.05).结论 Th17细胞及其相关细胞因子参与儿童SLE发病及病情发展.

Abstract：

Objective To investigate the Th17 cell expression in peripheral blood of childron with systemic lupus erythematosus (SLE) and explore the role of Th17 cells and the cytokines in the pathogenesis of SLE. Methods Twenty-five children with SLE were enrolled and 15 healthy children were controls. Flow cytometry (FCM) was employed to detect the expression of Th17 cells in peripheral blood of SLE children (SLE group, n=25), and IL-17, IL-21 levels in plasma were detected by ELISA. Two-independent sample t-test and Spearmen's test were used for correlation analysis. Results Compared with that of the control, the frequencies of CD3+CD8-IL-17+T[(1.24±0.64)% vs (0.59±0.21)%], CD3+CD8-IL-21+T cells[(1.5±0.6)%vs (0.8±0.4)% ] increased significantly in SLE patients (P＜0.01) and the plasma concentrations of IL-17, IL-21 were significantly higher (P＜0.01). The SLE activity was positively correlated with the frequencies of CD3+CD8-IL-17+T cells, but not with CD3+CD8-IL-21+T cells. Conclusion Th17 cells and the related cytokinesplay an important role in the pathogenesis of childhood SLE.     

强直性脊柱炎CD4+T细胞白细胞介素-17核孤儿受体的表达及意义

目的 探讨强直性脊柱炎(AS)患者外周血CD4+T细胞白细胞介素(IL)-17蛋白水平和IL-17、核孤儿受体(RORγt)mRNA水平及意义.方法 取AS患者和健康人外周血单个核细胞(PBMCs),免疫磁珠分选CD4+T细胞,加佛波脂(PMA)腐子霉素(Ion)作用,经固定/透膜处理进行细胞内染色,流式细胞术(FCM)检测CD4+T细胞IL-17蛋白水平;用或不用非特异性刺激剂[抗CD3单抗(A-CD3)、抗CD28单抗(A-CD28)]刺激CIM+T细胞12 h和24 h后,应用实时荧光定量反转录聚合酶链反应(RT-PCR)检测IL-17、RORγt mRNA水平.组间比较采用方差分析,相关性分析采用Pearson相关分析.结果 CD4+T细胞IL-17蛋白水平AS活动组(1.26±0.44)较稳定组(0.56±0.21)和对照组(0.45±0.13)显著增高(P<0.01),同时IL-17、RORγt mRNA水平活动组较稳定组和对照组显著增高(P<0.01). 用A-CD3/A-CD28刺激后,AS患者CD4+T细胞IL-17、RORγtmRNA水平显著高于未刺激组(P<0.05),12 h刺激组又高于24 h刺激组(P<0.01).结论 AS患者外周血CD4+T细胞IL-17、RORγt表达水平显著增高,IL-17、RORγt表达水平可能与AS病情活动相关.     

CHB患者Th17-Treg失衡中IL-21的作用及机制

目的研究慢性乙型肝炎(CHB)患者外周Th17/调节性T细胞(Treg)失衡中IL-21的作用及其初步机制。方法流式细胞仪分别检测59例CHB患者和20例健康人外周血细胞中Th17细胞和Treg细胞频数,同时以ELISA法检测血清细胞因子IL-21、IL-17、IL-10、TGF-β水平。体外分别以IL21、IL-2刺激CHB患者外周血单核细胞(PBMC),以实时PCR检测培养细胞转录因子RORγt mRNA及Foxp3 mRNA表达水平,以ELISA法检测培养上清细胞因子IL-17、IL-10和TGF-β水平。结果与正常人群相比,IL-21、IL1 7、TGF-β水平显著升高(P均0.05),CHB患者外周Th17/Treg比例显著升高(P0.05),IL-21水平与Th1 7/Treg比例呈正相关(P=01.008)。与IL-2相比.IL-21刺激CHB患者PBMC的RORγt mRNA表达水平明显升高(P=0.016)而Foxp3 mRNA表达水平明显降低(P=0.018),相对应的培养上清中,IL-1 7水平显著上升(P=0.049)而IL-10、TGF-β水平明显降低(P=0.017,P=0.004)。结论 C、HB患者中IL-21能通过提高RORγt mRNA表达,同时抑制Foxp3 mRNA表达进而促进Th1 7/Treg失衡。     

辅助性T细胞Th17与1型糖尿病发病的关系

目的阐明1型糖尿病患者自身免疫反应与辅助性Th17T细胞的关系及其机制。方法选取2009年1月至2010年12月在武汉大学中南医院内分泌科诊治的门诊和住院1型糖尿病患者39例[1型糖尿病组,男21例,女18例,平均年龄（31±13）岁],另选择同期在武汉大学中南医院体检的健康志愿者36名[健康对照组,男19名,女17名,平均年龄（29±12）岁]和内分泌科收治的住院2型糖尿病患者40例[2型糖尿病组,男28例,女12例,平均年龄（36±8）岁]。采用流式细胞仪检测外周血Th17辅助性T细胞比例,应用荧光实时定量聚合酶链反应检测外周血单核细胞RORγt基因表达,运用酶联免疫吸附法检测血浆白细胞介素．17A和B细胞活化因子水平。采用t检验进行组间数据比较。结果1型糖尿病组Th17辅助性T细胞含量[（4．2±0．8）％VS（1．8±0．6）％,t=8．338,P=0．005]、血浆白细胞介素-17A水平[（2．42±0．24）VS（1．37±0．37）ng／L,t=5．601,P=0．021]、RORγt mRNA表达（5．0±1．3VS1．4±1．0,t=38．959,P=0．000）、B细胞活化因子水平[（91±5）VS（66±8）ng／L,t=6．211,P：0．015]显著高于健康对照组。偏相关分析显示,在1型糖尿病组中,B细胞活化因子与白细胞介素-17A水平呈显著正相关（r=0．623,P=0．000）。多元逐步回归分析显示,Th17辅助性T细胞与1型糖尿病患者空腹C肽水平呈显著负相关（r=-0．069,P=0．011）。结论Th17辅助性T细胞分泌的白细胞介素-17A可能通过促进B细胞活化因子的分泌影响B细胞的存活,参与1型糖尿病的发生。     

COPD大鼠肺组织IL-17、IL-21、RORγt的表达及辛伐他汀治疗对其的影响

目的 观察辛伐他汀对吸烟所致COPD大鼠肺组织中IL-17、IL-21及转录因子视黄酸相关孤儿受体γt (retinoid-related orphan nuclear receptor gamma t,RORγt)表达的影响,探讨辛伐他汀治疗COPD的价值及其作用机制.方法 SD雄性大鼠随机分为对照组(10只)、吸烟组(11只)及治疗组(10只);观察各组大鼠肺组织的病理改变,采用免疫组织化学方法对大鼠肺组织IL-17、IL-21及RORγt蛋白的分布进行检测;Real time RT-PCR方法对肺组织中IL-17、IL-21及RORγtmRNA的表达进行测定.结果 在支气管黏膜上皮和肺泡间隔内,IL-17、IL-21及RORγt阳性细胞在吸烟组[(90.00±14.02) cells/mm2、(61.18±9.16) cells/mm2、(77.27±7.95) cells/mm2]和治疗组[(72.80±10.79) cells/mm2、(49.40±3.34) cells/mm2、(65.40±5.23) cells/mm2]的表达量均高于对照组[(5.20±4.49) cells/mm2、(8.20±3.16) cells/mm2、(6.80±5.85) cells/mm2] (P＜0.01);且吸烟组的表达量高于治疗组(P＜0.05).肺组织中IL-17、IL-21及RORγt mRNA的表达吸烟组(7.49±2.93、12.22±4.98、4.04±0.21)和治疗组(2.39±0.62、3.78±0.35、1.76±0.25)均高于对照组(1.00±0.00、1.00±0.00、1.00±0.00)(P＜0.01),吸烟组的表达量高于治疗组(P＜0.05).肺泡间隔内的IL-17阳性细胞数与平均内衬间隔呈正相关(r=0.729,P＜0.01),与平均肺泡数呈负相关(r =-0.889,P＜0.01).结论 IL-17、IL-21和RORγt在大鼠COPD形成过程中起着一定的作用,辛伐他汀降低大鼠肺内炎症细胞及炎症因子IL-17、IL-21及RORγt的表达,这种作用是辛伐他汀抑制COPD大鼠肺组织炎症反应和肺病理改变的机制之一.     

Th17细胞、RORγt在肺纤维化大鼠模型中的表达及意义

目的初步探讨Thl7细胞及其维甲酸受体相关孤儿受体(retinoid-ralated orphan receptorγt,RORγt)在肺纤维化中的作用。方法 64只雄SD大鼠随机分为对照组(N)、肺纤维化模型组(B组)、地塞米松治疗组(D)。采用气管内注入博来霉素致大鼠肺纤维化模型.苏木精-依红(HE)观察肺组织病理形态学变化并测肺组织中羟脯氨酸(HYP)含量;PCR检测肺部RORγtmRNA的表达;流式细胞术计数肺组织CD4+IL-17+Th17细胞;ELISA测血清IL-17水平.结果 (1)B、D组肺组织病理呈现逐渐由肺泡炎至纤维化动态改变过程,B、D组肺组织内HYP含量在不同时间点均高于N组(P<0.05),28 d时数值最高;(2)与N组比较,B、D组在不同时间点肺组织中TH17细胞和RORγtmRNA、血清中IL-17表达均明显增高(P<0.05),以造模7d最为显著。结论 TH17细胞、RORγtmRNA和血清IL-17表达增高在肺纤维化形成过程中起重要作用。     

从Th1/Th2、Treg/Th17之间的平衡研究轻、中度慢性乙型肝炎患者CD4~+T淋巴细胞的免疫失衡状态

目的从Th17及其相关细胞因子与Th1、Th2、Treg的相互关系,探讨轻、中度CHB患者CD4~+T淋巴细胞的整体免疫失衡状态。方法选择轻、中度CHB患者,与健康志愿者进行比较,观察其外周血各免疫细胞(Th17、Th1、Th2、Treg、Th1/Th2、Treg/Th17)、相关细胞因子(IL-17、IL-6、TGF-β、IFN-γ、IL-4)、主要效应分子(穿孔素、颗粒酶B)和核转录因子(孤独核受体RORγt、Foxp3等)的变化及其相互关系。结果与健康志愿者相比,CHB患者CD8~+T淋巴细胞比例更高,CD4~+/CD8~+比例显著下降,差异有统计学意义(P0.01);与健康志愿者相比,CHB患者Th1细胞比例更高,Th1/Th2显著升高,差异有统计学意义(P0.01);与健康志愿者相比,CHB患者Th17细胞比例更高,Treg/Th17比例显著下降,差异有统计学意义(P0.01);与健康志愿者相比,CHB患者穿孔素和颗粒酶B的表达更高,差异有统计学意义(P0.01);与健康志愿者相比,CHB患者FOXP3、IL17mRNA和RORγt的表达差异无统计学意义(P0.05);与健康志愿者相比,CHB患者TGF-B1、IL-6、IL-17显著增高,差异有统计学意义(P0.01);IFN-γ和IL-4的表达差异无统计学意义(P0.05)。结论轻、中度CHB患者在免疫细胞及其相关细胞因子、效应分子等各环节,尤其是Treg/Th17比例,均处于严重的免疫失衡状态。