Allergic inflammation in upper and lower airways.

Area of Science:

• Respiratory Medicine
• Immunology
• Otolaryngology

Background:

• Increasing prevalence of allergic rhinitis and asthma highlights a need to understand upper and lower airway connections.
• Shared inflammatory pathways and triggers link upper and lower airway diseases.

Purpose of the Study:

• To review the relationship between upper and lower airways.
• To emphasize common pathophysiologic mechanisms.
• To explore how upper airway treatment benefits lower airways.

Main Methods:

• Comprehensive literature review using original articles and books.
• Analysis of studies derived from peer-reviewed journals and reviews.
• Focus on common triggers, inflammatory cells, mediators, and treatment modalities.

Main Results:

• Rhinitis and asthma share common triggers, inflammatory cells, mediators, and treatments.
• Distinct organ-specific responses exist in the nose and lungs.
• Understanding these differences aids in deciphering pathogenic mechanisms.

Conclusions:

• Significant relationships exist between upper and lower airways.
• Differential drug responses enhance understanding of rhinitis and asthma pathogenesis.
• Treating upper airway conditions offers therapeutic benefits for lower airway diseases.