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- Title
Obesity Enhances Non-Th2 Airway Inflammation in a Murine Model of Allergic Asthma.
- Authors
Mohamed, Marwa M. E.; Amrani, Yassine
- Abstract
Obese patients with asthma present with aggravated symptoms that are also harder to treat. Here, we used a mouse model of allergic asthma sensitised and challenged to house dust mite (HDM) extracts to determine whether high-fat-diet consumption would exacerbate the key features of allergic airway inflammation. C57BL/6 mice were intranasally sensitised and challenged with HDM extracts over a duration of 3 weeks. The impact of high-fat-diet (HFD) vs. normal diet (ND) chow was studied on HDM-induced lung inflammation and inflammatory cell infiltration as well as cytokine production. HFD-fed mice had greater inflammatory cell infiltration around airways and blood vessels, and an overall more severe degree of inflammation than in the ND-fed mice (semiquantitative blinded evaluation). Quantitative assessment of HDM-associated Th2 responses (numbers of lung CD4+ T cells, eosinophils, serum levels of allergen-specific IgE as well as the expression of Th2 cytokines (Il5 and Il13)) did not show significant changes between the HFD and ND groups. Interestingly, the HFD group exhibited a more pronounced neutrophilic infiltration within their lung tissues and an increase in non-Th2 cytokines (Il17, Tnfa, Tgf-b, Il-1b). These findings provide additional evidence that obesity triggered by a high-fat-diet regimen may exacerbate asthma by involving non-Th2 and neutrophilic pathways.
- Subjects
LUNGS; IMMUNOGLOBULIN E; T cells; HOUSE dust mites; EOSINOPHILIA; ASTHMA; INFLAMMATION; OBESITY; PNEUMONIA
- Publication
International Journal of Molecular Sciences, 2024, Vol 25, Issue 11, p6170
- ISSN
1661-6596
- Publication type
Article
- DOI
10.3390/ijms25116170