Activation of CD8+ T Cells in Chronic Obstructive Pulmonary Disease Lung.

Activation of CD8+ T Cells in Chronic Obstructive Pulmonary Disease Lung.
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慢性阻塞性肺疾病肺中 CD8 T 细胞的激活。

DOI:
10.1164/rccm.202305-0924oc
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发表时间:
2023
影响因子:
24.7
通讯作者:
Rao,DeepakA
Rao,DeepakA
中科院分区:
医学1区
文献类型:
--
作者:
Villaseñor-Altamirano,AnaB;Jain,Dhawal;Jeong,Yunju;Menon,JaivardhanA;Kamiya,Mari;Haider,Hibah;Manandhar,Reshmi;Sheikh,MuhammadDawoodAmir;Athar,Humra;Merriam,LouisT;Ryu,MinHyung;Sasaki,Takanori;Castaldi,PeterJ;Rao,DeepakA

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理论基础:尽管炎症在慢性阻塞性肺疾病中很重要,但轻-中度疾病患者肺组织中的免疫细胞图谱在单细胞和分子水平上尚未得到很好的表征。目的:在单细胞分辨率下确定轻-中度慢性阻塞性肺疾病患者肺组织中的免疫细胞图谱。方法:我们对轻-中度慢性阻塞性肺疾病患者(n= 5,全球慢性阻塞性肺疾病全球倡议I或II)、无气流阻塞的肺气肿(n= 5)、终末期慢性阻塞性肺疾病(n= )2例,对照组(n= 6例),供者(n= 4例)。我们在一个独立的患者队列中进行了验证(N=CD8929),并与HHIP+/ 小鼠COPD模型进行了整合。测量和主要结果:轻-中度COPD肺中两个CD8+T细胞亚群的丰度增加:细胞毒性KLRG1TIGIT+CX3CR1+TEMRA(T效应记忆CD45RA+)细胞和dNAM-1+−+T驻留记忆(TRM)细胞。这些CD8+T细胞通过IFN与髓样细胞和肺泡II型细胞相互作用,并具有过度扩增的T细胞受体克隆型。在一个独立的队列中,CD8+KLRG1+TEMRA细胞在轻、中度COPD肺与对照组或终末期COPD肺相比增加。人CD8+KLRG1+TEMRA细胞类似于CD8+T细胞在COPD衰老小鼠模型中驱动炎症的作用。结论:CD8+TEMRA细胞在轻、中度COPD小鼠肺组织中表达增加,可能参与了严重疾病前的炎症反应。对这些CD8+T细胞的进一步研究可能对预防严重的COPD具有治疗意义。
Rationale:Despite the importance of inflammation in chronic obstructive pulmonary disease (COPD), the immune cell landscape in the lung tissue of patients with mild-moderate disease has not been well characterized at the single-cell and molecular level.Objectives:To define the immune cell landscape in lung tissue from patients with mild-moderate COPD at single-cell resolution.Methods:We performed single-cell transcriptomic, proteomic, and T-cell receptor repertoire analyses on lung tissue from patients with mild-moderate COPD (n= 5, Global Initiative for Chronic Obstructive Lung Disease I or II), emphysema without airflow obstruction (n= 5), end-stage COPD (n= 2), control (n= 6), or donors (n= 4). We validated in an independent patient cohort (N= 929) and integrated with theHhip+/−murine model of COPD.Measurements and Main Results:Mild-moderate COPD lungs have increased abundance of two CD8+T cell subpopulations: cytotoxic KLRG1+TIGIT+CX3CR1+TEMRA (T effector memory CD45RA+) cells, and DNAM-1+CCR5+T resident memory (TRM) cells. These CD8+T cells interact with myeloid and alveolar type II cells viaIFNGand have hyperexpanded T-cell receptor clonotypes. In an independent cohort, the CD8+KLRG1+TEMRA cells are increased in mild-moderate COPD lung compared with control or end-stage COPD lung. Human CD8+KLRG1+TEMRA cells are similar to CD8+T cells driving inflammation in an aging-related murine model of COPD.Conclusions:CD8+TEMRA cells are increased in mild-moderate COPD lung and may contribute to inflammation that precedes severe disease. Further study of these CD8+T cells may have therapeutic implications for preventing severe COPD.
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