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Sarcoidosis: Immunopathogenesis and Immunological Markers.
Wei Sheng Joshua Loke1, Cristan Herbert2, Paul S Thomas1
1Inflammation and Infection Research Centre, Faculty of Medicine, University of New South Wales, Sydney, NSW 2052, Australia ; Department of Respiratory Medicine, Prince of Wales Hospital, Randwick, NSW 2031, Australia.
Sarcoidosis, an immune paradox affecting the lungs, has an unknown cause. This review explores its immunology, potential triggers, and novel biomarkers like exhaled breath condensate for better diagnosis and understanding.
Area of Science:
- Immunology
- Pulmonology
- Genetics
Background:
- Sarcoidosis is a multisystem granulomatous disease primarily affecting the lungs.
- It presents as an "immune paradox" with peripheral anergy and local inflammation.
- The exact etiology of sarcoidosis remains unknown, though a genetic predisposition to an antigen is suspected.
Purpose of the Study:
- To review the immunological features of sarcoidosis.
- To discuss evidence for various etiological agents.
- To explore novel biomarkers for disease characterization.
Main Methods:
- Review of existing literature on sarcoidosis immunology and etiology.
- Discussion of candidate etiological agents (infective and non-infective).
- Introduction of exhaled breath condensate as a potential biomarker source.
Main Results:
- Sarcoidosis pathogenesis involves complex immune responses in genetically susceptible individuals.
- Evidence for specific etiological agents remains inconclusive.
- Exhaled breath condensate shows promise for identifying immunological biomarkers.
Conclusions:
- Further research into sarcoidosis etiology and immunological biomarkers is crucial.
- Novel methods like exhaled breath condensate may aid in diagnosing and understanding sarcoidosis.
- Identifying reliable biomarkers is essential for assessing disease severity and prognosis.
