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Severe asthma associated with myasthenia gravis
Canadian Respiratory Journal
|September 14, 2013
Summary
Severe asthma can involve non-T-helper cell 2 immune responses. A case study highlights a patient with nonatopic asthma who developed myasthenia gravis, suggesting alternative immune pathways in refractory asthma.
Area of Science:
- Immunology
- Pulmonology
- Neurology
Background:
- Severe asthma affects 10% of asthma patients, with some cases being refractory.
- Refractory asthma may involve immunological mechanisms beyond T-helper cell 2 (Th2) responses.
- Nonatopic asthma suggests alternative immune pathways may be involved.
Observation:
- A 55-year-old man with adult-onset, nonatopic asthma, NSAID sensitivity, and idiopathic urticaria was studied.
- The patient presented with diplopia and mild ptosis two years after his asthma diagnosis.
- This led to a diagnosis of seropositive myasthenia gravis.
Findings:
- The case illustrates a potential link between nonatopic asthma and autoimmune conditions.
- This suggests that Th2-independent immune responses may play a role in certain severe asthma phenotypes.
- The co-occurrence of asthma and myasthenia gravis warrants further investigation into shared immunological mechanisms.
Implications:
- This case highlights the complexity of severe asthma and suggests non-Th2 immune pathways are crucial.
- It underscores the importance of considering autoimmune disorders in patients with refractory, nonatopic asthma.
- Further research is needed to elucidate the immunological connections between asthma and myasthenia gravis.
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