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Alpha1-antitrypsin deficiency and asthma.

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Alpha-1 antitrypsin deficiency (AATD) is linked to asthma, particularly severe forms. Further research is needed to understand the mechanisms connecting AATD and asthma, with screening recommended for certain asthma patients.

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Area of Science:

  • Pulmonology
  • Genetics
  • Immunology

Background:

  • Alpha-1 antitrypsin deficiency (AATD) is an underrecognized autosomal disorder increasing risk for liver and lung diseases.
  • A growing body of evidence suggests a link between AATD and asthma, especially severe asthma.
  • The prevalence of asthma in AATD individuals ranges from 4-38%.

Purpose of the Study:

  • To review and highlight the association between alpha-1 antitrypsin deficiency and asthma.
  • To explore potential biological mechanisms linking AATD and asthma.
  • To recommend screening for AATD in specific asthma patient groups.

Main Methods:

  • Literature review of studies investigating the AATD-asthma association.
  • Analysis of proposed biological pathways involving alpha-1 antitrypsin.
  • Synthesis of current evidence and recommendations for future research and clinical practice.

Main Results:

  • A significant association exists between AATD and asthma, with higher prevalence in deficient individuals.
  • The underlying biological mechanisms are not fully elucidated but may involve elastase/antielastase imbalance and inflammation.
  • Alpha-1 antitrypsin's anti-inflammatory and immunomodulatory roles are key to understanding this link.

Conclusions:

  • Further research is crucial to elucidate the molecular mechanisms connecting AATD and asthma.
  • Screening for AATD is recommended in patients with late-onset asthma or non-reversible airway obstruction.
  • Understanding this association can improve diagnosis and management of both conditions.