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Chronic Obstructive Pulmonary Disease (COPD) Research / Asthma and Respiratory Diseases · Journal article
Scientific Reports · September 4, 2026
Early or partial results. Treat as a signal, not a conclusion.
This preclinical study in Brown Norway rats demonstrates that high-fat, high-carbohydrate diet-induced obesity exacerbates allergic airway inflammation and impairs multiple measures of ventilatory function when combined with house dust mite sensitization. The work characterizes an animal model of the obese-asthma phenotype but does not establish clinical causality or mechanism in humans.
Controlled animal model study, two-way factorial design (diet × allergen exposure). Male Brown Norway rats; no age, weight at enrolment, or exclusion criteria stated.. Intervention: High-fat high-carbohydrate (HFHC) diet for 15 weeks; house dust mite (HDM) sensitization via subcutaneous injection and intranasal challenge.. Compared with: Control chow diet; vehicle (sham) challenge..
HFHC diet increased adiposity and altered metabolic markers (elevated glucose, cholesterol, NEFA, insulin) HFHC diet and HDM sensitization independently reduced tidal volume (TV), expired volume (EV), minute ventilation (MV), PIF/PEF, and mid-expiratory flow (EF50) Greatest impairment in ventilatory function observed in HFHC/HDM combined group
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This animal model work supports the hypothesis that obesity worsens allergic airway disease but does not directly inform clinical management. The findings may help explain mechanisms underlying the obese-asthma phenotype and could guide future translational research, but clinical validation is required.
An uncontrolled animal model study demonstrating mechanistic features of obesity-asthma interaction; descriptive findings in a single species without human validation or clinical outcome data.
As stated by the source record.
Quoted from the source exactly as published.
This animal model work supports the hypothesis that obesity worsens allergic airway disease but does not directly inform clinical management. The findings may help explain mechanisms underlying the obese-asthma phenotype and could guide future translational research, but clinical validation is required.
Graded across the dimensions that decide whether you should act, each from what the source actually supports. There is no single score, and where a dimension was not assessed it says so.
Abstract Obesity is a comorbidity that worsens asthma control and lung mechanics. We evaluated whether diet-induced obesity (high-fat high-carbohydrate diet (HFHC) modifies allergic airway inflammation induced by house dust mite (HDM) sensitization in Brown Norway rats, using repeated double-chamber plethysmography (DCP) over time. Male Brown Norway rats were fed with control chow or HFHC diet for 15 weeks. After 8 weeks, animals were sensitized via subcutaneous HDM injections then challenged intranasally (or vehicle). Lung function was assessed at four time points via DCP. Metabolic profiling (glucose, insulin, HOMA-IR, leptin, cholesterol, triglycerides, NEFA), serum and BALF IL-6, adiposity indices, histology and eosinophil counts were measured. Two-way ANOVA (diet × HDM) with Tukey post-hoc testing was used. HFHC diet increased adiposity and altered metabolic markers (elevated glucose, cholesterol, NEFA, insulin). HFHC diet and HDM sensitization independently reduced tidal volume (TV), expired volume (EV), minute ventilation (MV), PIF/PEF, and mid-expiratory flow (EF50), with the greatest impairment in HFHC/HDM animals. BALF IL-6 concentration increased after HDM challenge; histology revealed peribronchiolar inflammation and structural alterations in the airways. Changes in sRaw and sGaw were less consistent. HFHC diet-induced obesity exacerbates allergic airway inflammation and impairs ventilatory function in Brown Norway rats. This longitudinal non-invasive model recapitulates features of the obese-asthma phenotype and provides a platform for descriptive findings and characterization of the model.
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