Title |
THP-1-derived macrophages render lung epithelial cells hypo-responsive to Legionella pneumophila – a systems biology study
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Published in |
Scientific Reports, September 2017
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DOI | 10.1038/s41598-017-12154-4 |
Pubmed ID | |
Authors |
Christine Schulz, Xin Lai, Wilhelm Bertrams, Anna Lena Jung, Alexandra Sittka-Stark, Christina Elena Herkt, Harshavadhan Janga, Katja Zscheppang, Christina Stielow, Leon Schulte, Stefan Hippenstiel, Julio Vera, Bernd Schmeck |
Abstract |
Immune response in the lung has to protect the huge alveolar surface against pathogens while securing the delicate lung structure. Macrophages and alveolar epithelial cells constitute the first line of defense and together orchestrate the initial steps of host defense. In this study, we analysed the influence of macrophages on type II alveolar epithelial cells during Legionella pneumophila-infection by a systems biology approach combining experimental work and mathematical modelling. We found that L. pneumophila-infected THP-1-derived macrophages provoke a pro-inflammatory activation of neighboring lung epithelial cells, but in addition render them hypo-responsive to direct infection with the same pathogen. We generated a kinetic mathematical model of macrophage activation and identified a paracrine mechanism of macrophage-secreted IL-1β inducing a prolonged IRAK-1 degradation in lung epithelial cells. This intercellular crosstalk may help to avoid an overwhelming inflammatory response by preventing excessive local secretion of pro-inflammatory cytokines and thereby negatively regulating the recruitment of immune cells to the site of infection. This suggests an important but ambivalent immunomodulatory role of macrophages in lung infection. |
X Demographics
Geographical breakdown
Country | Count | As % |
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Germany | 1 | 100% |
Demographic breakdown
Type | Count | As % |
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Scientists | 1 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
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Unknown | 46 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Ph. D. Student | 10 | 22% |
Researcher | 10 | 22% |
Student > Master | 6 | 13% |
Student > Doctoral Student | 4 | 9% |
Student > Postgraduate | 2 | 4% |
Other | 4 | 9% |
Unknown | 10 | 22% |
Readers by discipline | Count | As % |
---|---|---|
Biochemistry, Genetics and Molecular Biology | 9 | 20% |
Agricultural and Biological Sciences | 8 | 17% |
Immunology and Microbiology | 5 | 11% |
Pharmacology, Toxicology and Pharmaceutical Science | 4 | 9% |
Chemical Engineering | 2 | 4% |
Other | 7 | 15% |
Unknown | 11 | 24% |