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Bronchial Epithelial Cells on the Front Line to Fight Lung Infection-Causing Aspergillus fumigatus
Jeanne Bigot1, Loïc Guillot2, Juliette Guitard1
1Sorbonne Université, Inserm, Centre de Recherche Saint-Antoine, CRSA, AP-HP, Hôpital Saint-Antoine, Service de Parasitologie-Mycologie, Paris, France.
Abstract:
Aspergillus fumigatus is an environmental filamentous fungus that can be pathogenic for humans, wherein it is responsible for a large variety of clinical forms ranging from allergic diseases to life-threatening disseminated infections. The contamination occurs by inhalation of conidia present in the air, and the first encounter of this fungus in the human host is most likely with the bronchial epithelial cells. Although alveolar macrophages have been widely studied in the Aspergillus-lung interaction, increasing evidence suggests that bronchial epithelium plays a key role in responding to the fungus. This review focuses on the innate immune response of the bronchial epithelial cells against A. fumigatus, the predominant pathogenic species. We have also detailed the molecular interactants and the effects of the different modes of interaction between these cells and the fungus.
Insights
This review details the bronchial epithelial cells' innate immune response to Aspergillus fumigatus, a common airborne fungus causing various human infections. It highlights the critical role of these cells in the initial host defense against fungal invasion.
Area of Science:
- Pulmonology
- Mycology
- Immunology
Background:
- Aspergillus fumigatus is a widespread fungus causing human diseases from allergies to invasive infections.
- Inhalation of fungal conidia leads to initial host interaction with bronchial epithelial cells.
- While alveolar macrophages are studied, bronchial epithelium's role in Aspergillus-lung interactions is increasingly recognized.
Purpose of the Study:
- To review the innate immune response of bronchial epithelial cells against Aspergillus fumigatus.
- To detail molecular interactions between bronchial epithelial cells and A. fumigatus.
- To elucidate the effects of different interaction modes on these cells.
Main Methods:
- Literature review focusing on innate immunity and bronchial epithelial cells.
- Analysis of molecular mechanisms in host-fungus interactions.
- Synthesis of data on cellular responses to A. fumigatus.
Main Results:
- Bronchial epithelial cells mount an innate immune response to A. fumigatus.
- Specific molecular pathways and interactants are identified.
- Different fungal interaction modes elicit distinct cellular responses.
Conclusions:
- Bronchial epithelial cells are crucial in the early defense against Aspergillus fumigatus.
- Understanding these interactions is key to managing fungal lung diseases.
- Further research into epithelial cell responses can inform therapeutic strategies.
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