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Frequent exacerbator-a novel endotype of pediatric asthma

Kieran J Phelan1, Gurjit K Khurana Hershey2

  • 1Division of Asthma Research, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio; Medical Scientist Training Program, University of Cincinnati College of Medicine, Cincinnati, Ohio.

The Journal of Allergy and Clinical Immunology
|May 23, 2025
PubMed

Insights

Pediatric asthma can be categorized by a frequent exacerbator (FE) endotype, marked by recurrent attacks. Understanding this endotype is crucial for developing new asthma treatments.

Area of Science:

  • Pulmonology and Respiratory Medicine
  • Pediatric Asthma Research
  • Immunology and Inflammation

Background:

  • Asthma is a chronic respiratory disease with diverse underlying mechanisms (endotypes).
  • Established endotypes include TH2 inflammation, viral response, and air pollution exposure.
  • A novel pediatric asthma endotype, the frequent exacerbator (FE) endotype, is characterized by recurrent exacerbations.

Purpose of the Study:

  • To provide a comprehensive overview of the pediatric frequent exacerbator (FE) asthma endotype.
  • To explore the epidemiology, definition, and clinical/environmental associations of the FE endotype.
  • To detail molecular findings, particularly airway gene expression, in pediatric FE asthma.

Main Methods:

  • Literature review focusing on pediatric asthma research.
  • Analysis of epidemiological data and clinical associations.
  • Examination of molecular characterizations, including airway gene expression studies.

Main Results:

  • The FE endotype represents a distinct phenotype of pediatric asthma.
  • Recurrent exacerbations in pediatric asthma are linked to specific environmental and clinical factors.
  • Molecular studies reveal unique airway gene expression patterns in FE pediatric asthma.

Conclusions:

  • The frequent exacerbator (FE) endotype is a significant phenotype in pediatric asthma.
  • Understanding the FE endotype's characteristics is vital for targeted therapeutic development.
  • Further research into FE asthma mechanisms can reduce mortality and economic burden.

Keywords:
Asthmaendotypesexacerbationfrequent exacerbators

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