香烟烟雾暴露对肺气肿小鼠CD4+IL-17+辅助性T细胞的影响  被引量:1

Effect of cigarette smoke exposure on the interlenkin-17-producing CD4+T helper lymphocyte in mice with emphysema

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作  者:段敏超[1] 钟小宁[1] 唐海娟[1] 黄颖[1] 

机构地区:[1]广西医科大学第一附属医院呼吸内科,南宁530021

出  处:《中华微生物学和免疫学杂志》2011年第8期678-684,共7页Chinese Journal of Microbiology and Immunology

摘  要:目的探讨香烟烟雾暴露对肺气肿小鼠肺实质、外周血中CD4±IL-17±辅助性T细胞(Th17)的影响。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(C12)、对照24周组(C24)、烟雾暴露12周组(S12)、烟雾暴露24周组(S24)。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(Lm)和肺泡破坏指数(DI);酶联免疫吸附法检测小鼠支气管肺泡灌洗液中IL-17、干扰素(IFN)-γ和肿瘤坏死因子(TNF)-α水平及肺实质中IFN-γ和TNF-α水平;流式细胞术检测小鼠肺实质、外周血中CD4±IL-17±T(r11117)细胞占CD4T细胞的百分比;免疫荧光PCR法检测小鼠肺实质、外周血中ROR'yt和IL-17的mRNA表达,并分析这些指标的相互关系。结果(1)S12组和$24组Lm为(39.19±3.51)μm和(46.87±7.16)I.Lm,DI为39.13±1.57和45.16±3.13,均明显高于C12组和C24组(32.60±3.21)μm和(32.38±3.73)μm及28.23±1.62和28.86±2.07,以S24组增高更为明显,差异均有统计学意义(均P〈0.05)。(2)S12组和S24组BALF中IL-17、IFN-γ及TNF-α水平[(119.72±10.72)ng/L和(296.40±14.00)ng/L、(129.7±22.2).g/L和(251.1±62.4)g/L,(17.35±1.60).g/L和(36.35±1.43)ng/L]较C12组和C24组[(52.06±4.70)ng/L和(51.89±6.82)ng/L、(85.8±26.8)ng/L和(88.9±11.5)ng/L,(6.41±0.90)ng/L和(5.85±0.92).g/L]明显增高;在肺实质中,S12组和S24组IFN-1及TNF-ct水平[(1124.3±174.4)ng/L和(1342.7±206.1)ng/L,(77.2±13.7).g/L和(101.7±19.0)ng/L]亦较C12组和C24组[(946.2±81.9).g/L和(1027.2±188.3)ng/L,(6Z.1±16.1)ng/L和(64.4±15.1)ng/L]明显增高;且以S24组增高更为明显,差异均有统计�Objective To investigate the effect of cigarette smoke exposure on the interleukin-17- producing CD4T helper lymphocyte( Th17 ) in peripheral blood and lungs of cigarette smoke-induced emphysema mice. Methods Forty male BALB/c mice were randomly divided into 4 groups, including a con- trol group C12, a control group C24, a smoke-exposure group S12 and a smoke-exposure group S24, 10 mice each group. Morphological changes were evaluated by mean linear intercepts (Lm) and destructive index (DI). The concentration of IL-17, IFN-γ and TNF-α in bronchoalveolar lavage fluid(BALF) and the con- centration of IFN-γ/and TNF-α in lung homogenates were measured by enzyme-linked immunosorbent assay (ELISA). The proportion of CD4IL-17 Thl7 ceils in peripheral blood and lungs of mice was determined by flow cytometry. The mRNA expressions of RORγt and IL-17 in peripheral blood and lungs were evaluated by real-time PCR. Results Lm and DI were significantly higher in S12 and S24 groups [ (39.19±3.51) μm vs (46.87±7.16) μm, 39.13±1.57 vs 45.16±3.13 ] than that in C12 and C24 groups [ (32.60± 3.21) nm vs (32.38±3.73) nm, 28.23±1.62 vs 28.86±2.07], all P〈0.05. IL-17, IFN-γ and TNF-α in BALF of S12 and S24 groups [ (119.72±10.72) ng/L vs (296.40±14.00) ng/L, (129.7±22.2) ng/L vs(251.1 ±62.4) ng/L, (17.35± 1.60) ng/L, (36.35± 1.43 ) ng/L] were higher than those in C12 and C24 groups[ (52.06±4.70) ng/L vs (51.89±6.82) ng/L, (85.8±26.8) ng/L vs (88.9±11.5) ng/L, (6.41±0.90) ng/L vs (5.85±0.92) ng/L], IFN-± and TNF-ot in lungs of S12 and S24 groups [ ( 1124.3 ±174.4) ng/L vs (1342.7±206.1) ng/L, (77.2±13.7) ng/L vs (101.7±19.0) ng/L, (129.7±22.2) ng/L vs (251.1±62.4) ng/L] were higher than those in C12 and C24 groups[ (946. 2±81.9) ng/L vs (1027.2±188.3) ng/L, (62.1±16.1) ng/L vs(64.4±15.1) ng/L], all P〈0.05. The percentage of Thl7 cells in lungs of S12 and $24 groups [ (3

关 键 词:CD4+IL-17+辅助性T细胞 炎症 香烟暴露 肺气肿 

分 类 号:R563.3[医药卫生—呼吸系统]

 

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