香烟烟雾暴露肺气肿小鼠肺中Th17细胞的变化及可能机制  被引量:9

Mechanisms and dynamics of Thl7 cells in mice with cigarette smoke-induced emphysema

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作  者:段敏超[1] 钟小宁[1] 黄颖[1] 何志义[1] 唐海娟[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:《中华医学杂志》2011年第28期1996-2000,共5页National Medical Journal of China

基  金:基金项目:广西自然科学基金(2011GXNSFA018178);广西研究生教育创新计划项目(2010105981002D28)

摘  要: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CCL2Objective 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 correl

关 键 词:肺气肿 T淋巴细胞 辅助诱导 受体 趋化因子 白细胞介素类 烟草对健康的危害 

分 类 号:R563.3[医药卫生—呼吸系统]

 

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