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Leptin, adiponectin and pulmonary diseases.

Nour Ali Assad1, Akshay Sood

  • 1University of New Mexico Health Sciences Center School of Medicine, Department of Medicine, 1 University of New Mexico, MSC 10 5550, Albuquerque, NM 87131, USA.

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|March 27, 2012
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Summary

Adipokines like leptin and adiponectin influence lung health, with complex associations in asthma and COPD. Further research is needed to clarify their roles and therapeutic potential, independent of obesity.

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Area of Science:

  • Pulmonary Medicine
  • Endocrinology
  • Immunology

Background:

  • Adipose tissue-derived adipokines, leptin and adiponectin, are implicated in inflammatory lung conditions.
  • Leptin and adiponectin receptors are present in the human lung.
  • Existing research on adipokines' role in human asthma and COPD presents conflicting findings.

Purpose of the Study:

  • To review the current understanding of leptin and adiponectin's association with asthma and COPD in humans.
  • To identify gaps in the existing literature regarding adipokines and pulmonary diseases.
  • To explore the potential for adipokine modulation as a therapeutic strategy for inflammatory lung conditions.

Main Methods:

  • Systematic review of human studies investigating leptin and adiponectin in asthma and COPD.
  • Analysis of associations between systemic/airway adipokine levels and disease prevalence, severity, and lung function.
  • Examination of potential confounding factors such as obesity and sex differences.

Main Results:

  • Leptin's association with asthma is controversial in adults but suggests increased prevalence/severity in children. In COPD, leptin may be higher, especially in women, correlating with inflammation.
  • Adiponectin's role in asthma is debated; it may be protective in some female groups but associated with severity in others. In COPD, adiponectin is elevated and inversely linked to lung function in patients.
  • Evidence suggests adipokine effects can be context-dependent, with potential pro- or anti-inflammatory roles.

Conclusions:

  • The relationship between adipokines (leptin, adiponectin) and human inflammatory lung diseases like asthma and COPD is complex and often contradictory.
  • Significant gaps exist, including the need for longitudinal studies, better obesity adjustment, and understanding sex-specific interactions.
  • Future research should focus on adipokine modulation, independent of BMI, for novel therapeutic approaches in pulmonary conditions.