Severe Asthma and Biologics: Managing Complex Patients

Area of Science:

• Respiratory Medicine
• Immunology
• Clinical Science

Background:

• Bronchial asthma is a chronic respiratory inflammatory disease with diverse clinical presentations (phenotypes) and underlying mechanisms (endotypes).
• Accurate phenotype/endotype classification is vital for selecting novel biologic therapies for patients unresponsive to conventional treatments.
• Comorbidities significantly exacerbate asthma symptoms and complicate disease management, necessitating thorough assessment and treatment.

Purpose of the Study:

• To outline the clinical features of patients with severe asthma that present complex management challenges.
• To highlight the importance of differentiating severe eosinophilic asthma from other conditions with high eosinophil counts.
• To emphasize the role of comorbidities in complicating asthma control despite appropriate therapy.

Main Methods:

• Review of clinical features associated with severe asthma.
• Analysis of the impact of comorbidities on asthma control.
• Discussion of differential diagnosis for high blood eosinophil levels in asthma patients.
• Consideration of hypereosinophilia secondary to biological treatments.

Main Results:

• Severe asthma exhibits varied phenotypes and endotypes, impacting treatment response to biologics.
• Comorbidities such as chronic rhinosinusitis with nasal polyps, obesity, bronchiectasis, and immune deficiency negatively affect asthma control.
• High blood eosinophil levels require differentiation between isolated eosinophilic asthma, eosinophilic granulomatosis with polyangiitis, and treatment-induced hypereosinophilia (e.g., with dupilumab).

Conclusions:

• Effective management of severe asthma requires a comprehensive approach addressing phenotypes, endotypes, and comorbidities.
• Identifying and treating comorbidities can improve asthma symptom control and reduce morbidity.
• Careful evaluation of eosinophil levels is crucial for accurate diagnosis and tailored therapeutic strategies in severe asthma.