Staphylococcus Aureus Enterotoxins in Respiratory Disorders

Staphylococcus aureus enterotoxins (SEs) are a group of superantigenic exotoxins capable of disrupting respiratory mucosal homeostasis and driving chronic inflammation. Colonisation of the nasal passages and lower airway by S. aureus is asymptomatic in the majority of healthy carriers but can foster type 2–biased immune responses in susceptible individuals. SEs engage T-cell receptors in a non-specific manner, leading to massive cytokine release, eosinophil recruitment and IgE production. In chronic rhinosinusitis with nasal polyposis (CRSwNP) and allergic asthma, SEs such as enterotoxin B (SEB) compromise epithelial barrier integrity through reactive oxygen species generation and endoplasmic reticulum stress, amplify interleukin-5 and interleukin-13 pathways, and perpetuate local IgE sensitisation. These mechanisms contribute both to disease onset and to exacerbation of established airway disorders. Beyond allergic phenotypes, emerging evidence suggests SE-mediated immune modulation may influence chronic obstructive pulmonary disease (COPD) subgroups. Understanding the interplay between superantigen exposure, host genetics and environmental cofactors is critical to inform targeted therapies, including monoclonal antibodies against IgE or key cytokines, and to develop prophylactic approaches aimed at de-colonisation or toxin neutralisation.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Staphylococcus Aureus Enterotoxins in Respiratory Disorders publication trend

The graph below shows the total number of articles in staphylococcus aureus enterotoxins in respiratory disorders across all publications each year (not limited to Nature Index journals).

Technical terms

Superantigen: An exotoxin that non-specifically activates large numbers of T cells by cross-linking the variable region of the T-cell receptor with MHC class II molecules on antigen-presenting cells.

Th2 response: A type 2 helper T-cell–mediated immune reaction characterised by production of interleukins 4, 5 and 13, driving eosinophilic inflammation and IgE synthesis.

Eosinophilia: An elevated presence of eosinophils in tissues or circulation, commonly associated with allergic inflammation.

Barrier integrity: The functional state of epithelial cell junctions and mucosal layers that protects airway surfaces from pathogen invasion and allergen penetration.

Endoplasmic reticulum stress: Cellular condition arising from the accumulation of misfolded proteins in the endoplasmic reticulum, leading to activation of inflammatory and apoptotic pathways.

References

1. IgE is associated with exacerbations and lung function decline in COPD. Respiratory Research (2022).
2. Staphylococcus aureus and Chronic Airway Disease. World Allergy Organization Journal (2010).
3. The role of Staphylococcus aureus enterotoxin B in chronic rhinosinusitis with nasal polyposis. Cell Communication and Signaling (2022).
4. Monoclonal Antibodies and Airway Diseases. International Journal of Molecular Sciences (2020).
5. Modulation of Allergic Sensitization and Allergic Inflammation by Staphylococcus aureus Enterotoxin B in an Ovalbumin Mouse Model. Frontiers in Immunology (2020).
6. The Role of Staphylococcus aureus and Its Toxins in the Pathogenesis of Allergic Asthma. International Journal of Molecular Sciences (2022).