The Acrolein - Lipopolysaccharide Mouse Model for Frequent Exacerbations in COPD.

IF 5.9 2区 医学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY
Bernhard Fe Reiter, Natalie Bordag, Diana Schnoegl, Martina Delbeck, Tobias Madl, Hansjörg Habisch, Grazyna Kwapiszewska, Jörg Meding, Leigh M Marsh
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Abstract

Chronic obstructive pulmonary disease (COPD) is a severe progressive lung disease, often caused by prolonged exposure to cigarette smoke and environmental factors. Pre-clinical COPD research predominately relies on chronic smoke or elastase animal models, each with their own advantages and limitations, such as limited pathophysiological insights or long treatment times. Here we describe a novel and time efficient mouse model of COPD based on bacterial lipopolysaccharide (LPS) and the reactive aldehyde acrolein (Acro). Mice were treated once per week for four weeks with a combination of both LPS and Acro. Histological, inflammatory, and metabolomic alterations were analysed by histological quantification, multicolour flow cytometry, and nuclear magnetic resonance (NMR). Acro/LPS treatment induced moderate airspace enlargement and bronchial remodelling. These structural changes were associated with a distinct inflammatory profile marked by an increase in macrophages, and T-helper cells, as well as increased cytokines, including CXCL11, IL-17a, and TNF-α. Strong inflammation, consisting of T-helper and B-cells was detected in the perivascular and peribronchial space, and increased macrophages in the alveolar regions. Additionally, intervention with the steroid dexamethasone induced a strong reduction in T-cells and macrophages and partially ameliorated histological alterations. Furthermore, we could detect alterations in the metabolome of serum and tissue, including an increase in COPD associated metabolites like trimethylamine N-oxide, as well as a misbalance in energy related metabolites and several amino acids. In summary, we can describe a practical, representative, and time efficient mouse model of COPD, with the potential to study the immunological and pathophysiological development of the disease.

丙烯醛-脂多糖慢性阻塞性肺病频繁加重小鼠模型。
慢性阻塞性肺疾病(COPD)是一种严重的进行性肺部疾病,通常由长期接触香烟烟雾和环境因素引起。临床前COPD研究主要依赖于慢性烟雾或弹性蛋白酶动物模型,每种模型都有自己的优势和局限性,如病理生理学见解有限或治疗时间长。在这里,我们描述了一种基于细菌脂多糖(LPS)和活性醛丙烯醛(Acro)的新型和高效的COPD小鼠模型。小鼠每周用LPS和Acro联合治疗一次,持续四周。通过组织学定量、多色流式细胞术和核磁共振(NMR)分析组织学、炎症和代谢组学改变。Acro/LPS处理引起中度气道扩张和支气管重塑。这些结构变化与巨噬细胞和t辅助细胞的增加以及细胞因子(包括CXCL11、IL-17a和TNF-α)的增加有关。血管周围和支气管周围可见由t辅助细胞和b细胞组成的强烈炎症,肺泡区巨噬细胞增多。此外,类固醇地塞米松干预诱导t细胞和巨噬细胞的强烈减少,并部分改善组织学改变。此外,我们可以检测血清和组织代谢组的变化,包括COPD相关代谢物如三甲胺n -氧化物的增加,以及能量相关代谢物和几种氨基酸的失衡。总之,我们可以描述一个实用的、有代表性的、时间效率高的COPD小鼠模型,具有研究该疾病的免疫和病理生理发展的潜力。
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来源期刊
CiteScore
11.20
自引率
3.10%
发文量
370
审稿时长
3-8 weeks
期刊介绍: The American Journal of Respiratory Cell and Molecular Biology publishes papers that report significant and original observations in the area of pulmonary biology. The focus of the Journal includes, but is not limited to, cellular, biochemical, molecular, developmental, genetic, and immunologic studies of lung cells and molecules.
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