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Published on: October 22, 2019
The role of macrophages in obstructive airways disease: chronic obstructive pulmonary disease and asthma
Konstantinos Pappas1, Andriana I Papaioannou, Konstantinos Kostikas
1Department of Thoracic Medicine, Faculty of Medicine, University of Crete, Crete, Greece.
Abstract:
Macrophages are a major cellular component of the innate immune system, and play an important role in the recognition of microbes, particulates, and immunogens and to the regulation of inflammatory responses. In the lung, macrophages react with soluble proteins that bind microbial products in order to remove pathogens and particles and to maintain the sterility of the airway tract. Chronic obstructive pulmonary disease and asthma are both obstructive airway diseases that involve chronic inflammation of the respiratory tract which contributes to disease progression. In the case of COPD, there is increasing evidence that lung macrophages orchestrate inflammation through the release of chemokines that attract neutrophils, monocytes and T cells and the release of several proteases. On the other hand, in asthma, it seems that alveolar macrophages are inappropriately activated and are implicated in the development and progression of the disease. In this review we summarize the current basic and clinical research studies which highlight the role of macrophages in asthma and COPD.
Insights
This review highlights how lung macrophages orchestrate inflammation in chronic obstructive pulmonary disease (COPD) and asthma. Understanding macrophage roles is key to developing new treatments for these obstructive airway diseases.
Area of Science:
- Immunology
- Pulmonology
- Cell Biology
Background:
- Macrophages are crucial innate immune cells involved in pathogen recognition and inflammatory response regulation.
- In the lungs, macrophages maintain airway sterility by clearing pathogens and particles.
- Chronic obstructive pulmonary disease (COPD) and asthma are inflammatory airway diseases where macrophages play a significant role.
Purpose of the Study:
- To review current research on the role of macrophages in the pathogenesis of asthma and COPD.
- To elucidate how lung macrophages contribute to the inflammatory processes in these obstructive airway diseases.
Main Methods:
- Review of existing basic and clinical research studies.
- Analysis of literature focusing on macrophage function in respiratory inflammation.
Main Results:
- In COPD, lung macrophages orchestrate inflammation by releasing chemokines and proteases, attracting other immune cells.
- In asthma, alveolar macrophages appear inappropriately activated, contributing to disease development and progression.
Conclusions:
- Macrophages are central players in the inflammatory pathways of both asthma and COPD.
- Further research into macrophage function may lead to targeted therapies for obstructive airway diseases.
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