Gut Microbiome Influences on Allergic Airway Diseases

The gut microbiome influences allergic airway diseases through immune regulation, metabolite production and mucosal barrier interactions along the gut–lung axis. From early infancy, microbial colonisation programmes immune tolerance by fostering regulatory T-cell development and limiting pro-inflammatory pathways that underlie allergic asthma and rhinitis. Disturbances in microbial composition, or dysbiosis, can disrupt the balance between T helper type 2 responses and regulatory mechanisms, promoting hypersensitivity to inhaled allergens. Key microbial metabolites, notably short-chain fatty acids such as acetate and butyrate, support epithelial integrity, enhance mucosal tolerance and modulate systemic immunity. Early-life factors including mode of delivery, antibiotic exposure, maternal diet and supplement use shape gut microbial maturation, defining a critical window in which interventions may prevent airway inflammation. Emerging evidence highlights potential applications of probiotics, diet modification and targeted microbial consortia to restore homeostasis, reduce disease onset and limit exacerbations across diverse populations.

Research from Nature Portfolio

Recent studies reveal that impaired gut microbial maturation at one year of age is a common feature in children who later develop asthma, atopic dermatitis, food allergy and allergic rhinitis by five years, characterised by reduced mucous-preserving taxa, altered fermentative function and elevated oxidative stress metabolites. In infants at high inherited risk of asthma, early supplementation with Lactobacillus rhamnosus can temporarily correct delays in microbial development and restore anti-inflammatory lipid profiles, although benefits wane after cessation of supplementation. Additional work has shown that optimal maturation of the gut microbiome during the first year of life is protective against inherited asthma risk, suggesting that nurturing microbial diversity in infancy may confer long-term resistance to allergic airway disease.

Gut Microbiome Influences on Allergic Airway Diseases publication trend

The graph below shows the total number of articles in gut microbiome influences on allergic airway diseases across all publications each year (not limited to Nature Index journals).

Technical terms

Dysbiosis: A disruption or imbalance in the normal composition and function of microbial communities.

Gut–lung axis: The bidirectional communication network between gut and respiratory tract microbiomes that influences immune homeostasis.

Short-chain fatty acids: Microbial metabolites (e.g., acetate, butyrate) derived from fibre fermentation that modulate inflammation and barrier integrity.

Regulatory T cells: A subset of T lymphocytes that suppress immune overreaction and maintain tolerance to self and non-harmful antigens.

Maturation of the gut microbiome: The process by which microbial diversity and function evolve to a stable adult-like state during early childhood.

References

1. Delayed gut microbiota maturation in the first year of life is a hallmark of pediatric allergic disease. Nature Communications (2023).
2. Maturation of the gut microbiome and risk of asthma in childhood. Nature Communications (2018).
3. Delayed gut microbiota development in high-risk for asthma infants is temporarily modifiable by Lactobacillus supplementation. Nature Communications (2018).
4. Dysbiosis of the gut and lung microbiome has a role in asthma. Seminars in Immunopathology (2020).
5. The Role of the Microbiome in Asthma: The Gut–Lung Axis. International Journal of Molecular Sciences (2018).
6. Associations between infant fungal and bacterial dysbiosis and childhood atopic wheeze in a nonindustrialized setting. Journal of Allergy and Clinical Immunology (2017).
7. Asthma and the microbiome: defining the critical window in early life. Allergy, Asthma & Clinical Immunology (2017).