肺CD8 +细胞中CC趋化因子受体5和CXC趋化因子受体6的表达与慢性阻塞性肺疾病的严重程度相关。

CC chemokine receptor 5 and CXC chemokine receptor 6 expression by lung CD8+ cells correlates with chronic obstructive pulmonary disease severity.

作者信息

Freeman Christine M, Curtis Jeffrey L, Chensue Stephen W

机构信息

Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan Health System, Ann Arbor, USA.

出版信息

Am J Pathol. 2007 Sep;171(3):767-76. doi: 10.2353/ajpath.2007.061177. Epub 2007 Jul 19.

Abstract

Chronic obstructive pulmonary disease (COPD) is a progressive disease associated with a cellular inflammatory response. CD8(+) T cells are implicated in COPD pathogenesis, and their numbers significantly correlate with the degree of airflow limitation. Dendritic cells (DCs) are important sentinel immune cells, but little is known about their role in initiating and maintaining the CD8 T-cell response in COPD. To investigate the mechanisms for CD8(+) T-cell recruitment to the lung, we used resected human lung tissue to analyze chemokine receptor expression by CD8(+) T cells and chemokine production by CD1a(+) DCs. Among 11 surveyed chemokine receptors, only CC chemokine receptor (CCR5), CXC chemokine receptor (CXCR) 3, and CXCR6 correlated with COPD severity as defined by criteria from the Global Initiative for Chronic Obstructive Lung Disease. The CD8(+) T cells displayed a Tc1, CD45RA(+) effector memory phenotype. CD1a(+) DCs produced the respective ligands for CCR5 and CXCR3, CCL3 and CXCL9, and levels correlated with disease severity. CD1a(+) DCs also constitutively expressed the CXCR6 ligand, CXCL16. In conclusion, we have identified major chemokine elements that potentially mediate CD8(+) T-cell infiltration during COPD progression and demonstrated that CD1a(+) mucosal-associated DCs may sustain CD8(+) T-cell recruitment/retention. Chemokine targeting may prove to be a viable treatment approach.

摘要

慢性阻塞性肺疾病(COPD)是一种与细胞炎症反应相关的进行性疾病。CD8(+) T细胞与COPD发病机制有关,其数量与气流受限程度显著相关。树突状细胞(DCs)是重要的前哨免疫细胞,但关于它们在启动和维持COPD中CD8 T细胞反应方面的作用知之甚少。为了研究CD8(+) T细胞募集至肺的机制,我们使用切除的人肺组织来分析CD8(+) T细胞趋化因子受体表达以及CD1a(+) DCs趋化因子产生情况。在11种被检测的趋化因子受体中,只有CC趋化因子受体(CCR5)、CXC趋化因子受体(CXCR)3和CXCR6与慢性阻塞性肺疾病全球倡议组织标准所定义的COPD严重程度相关。CD8(+) T细胞表现出Tc1、CD45RA(+)效应记忆表型。CD1a(+) DCs产生CCR5和CXCR3各自的配体CCL3和CXCL9,且水平与疾病严重程度相关。CD1a(+) DCs还组成性表达CXCR6配体CXCL16。总之,我们确定了在COPD进展过程中可能介导CD8(+) T细胞浸润的主要趋化因子成分,并证明CD1a(+)黏膜相关DCs可能维持CD8(+) T细胞的募集/滞留。趋化因子靶向治疗可能被证明是一种可行的治疗方法。

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