Project description
How bacterial pneumonia induces trained immunity
Inflammation plays a key role in respiratory conditions, where previous infections can trigger changes in macrophages. Repeated influenza infections harm the lungs, while bacterial pneumonia increases monocyte production, exacerbating inflammation. Supported by the Marie Skłodowska-Curie Actions programme, the Trained_Lung project will investigate how bacterial pneumonia induces trained immunity, leading to excessive inflammation and lung damage when exposed to other bacteria or environmental pollutants. The project will identify pathogens that train human macrophages, study the secondary inflammatory responses to various bacteria, explore bone marrow myelopoiesis and macrophage function after pneumonia in mice, assess how these changes affect lung function, and examine the impact of trained macrophages on immune responses in iPSC-derived human lung organoids.
Objective
The world health organisation has labeled inflammatory diseases the greatest threat to human health. Inflammation is a major cause of pathogenesis in respiratory conditions such as bronchiectasis, ARDS, and COPD. There is a growing appreciation that our prior pathogen exposure can induce trained immunity in macrophages. Trained_Lung will explore how bacterial pneumonia induces central trained immunity and how this can lead to excessive inflammation and lung damage, in response to other bacteria or environmental pollutants. Recently it has been shown that repeat exposure to influenza can lead to lung damage due to the altered functionality of lung macrophages, leading to excessive inflammation and damage to the structure of the lung. However, it remains unclear if this is the case for bacterial pneumonia and if it can lead to inappropriate inflammatory response upon rechallenge with other bacterial species or environmental pollutants. I propose that bacterial pneumonia will drive enhanced myelopoiesis and enhance circulating monocyte inflammatory responses. Further, these circulating monocytes will replace resident alveolar macrophage populations over time, seeding the lung with these trained monocytes which will become resident alveolar macrophages. Alveolar macrophages are constantly in contact with a range of bacteria, viruses, PAMPs, and pollutants which all have the potential to drive excessive inflammatory responses. Trained_Lung will identify pathogens that can train human macrophages and examine secondary inflammatory responses to a range of bacterial pathogens and environmental pollutants. Further, myelopoietic changes in the bone marrow and functional changes in macrophages post-pneumonia in mice will be explored, and how these changes impact subsequent challenges in terms of lung function and damage. Finally, Trained_Lung will explore how trained macrophages impact immune responses within iPSC-derived human lung organoids, adding a key translational aspect
Fields of science (EuroSciVoc)
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Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA)
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Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships
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Call for proposal
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) HORIZON-MSCA-2023-PF-01
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35390 GIESSEN
Germany
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