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Pathogenesis of the eosinophilic pleural effusions
Ioannis Kalomenidis1, Richard W Light
1Department of Critical Care and Pulmonary Services, Evangelismos Hospital, Athens Medical School, Athens, Greece. jkalomenidis@hotmail.com
Current Opinion in Pulmonary Medicine
|June 29, 2004
Summary
Eosinophilic pleural effusions (EPE) involve inflammation in the pleural space. Interleukin-5 (IL-5) appears to be a key factor in EPE development, suggesting potential new therapies.
Area of Science:
- Pulmonology
- Immunology
- Pathogenesis
Background:
- Eosinophilic pleural effusions (EPE) are characterized by ≥10% eosinophils in pleural fluid.
- EPE constitute 5-16% of exudative pleural effusions.
- The underlying mechanisms of EPE remain incompletely understood.
Purpose of the Study:
- To review and elucidate the mechanisms driving eosinophilic pleural inflammation.
- To explore the diverse causes and pathways contributing to EPE.
Main Methods:
- Literature review of human and animal studies.
- Analysis of clinical features and pathogenetic pathways.
- Investigation of cytokine and chemokine involvement.
Main Results:
- EPE are associated with various conditions including air/blood in the pleural space, infections, inflammation, malignancy, pulmonary embolism, asbestos, and drug reactions.
- Interleukin-5 (IL-5) is identified as a significant common mediator in EPE pathogenesis.
- Other inflammatory mediators like cytokines, chemokines, and adhesion molecules are under investigation.
Conclusions:
- Understanding EPE pathogenesis is crucial for developing targeted therapies.
- Novel therapeutic strategies may include targeting IL-5, particularly for persistent, symptomatic, posttraumatic, and idiopathic cases.
- Anti-IL-5 treatment presents a promising avenue requiring further research.