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Minocycline-induced cell-mediated hypersensitivity pneumonitis.
J M Guillon1, P Joly, B Autran
1Hôpital Tenon, Paris, France.
Annals of Internal Medicine
|September 15, 1992
Summary
Minocycline exposure triggered hypersensitivity pneumonitis in a patient with chronic bronchitis. T-lymphocyte responses, particularly cytotoxic T cells, were key in the drug-induced lung inflammation.
Area of Science:
- Pulmonology
- Immunology
- Pharmacology
Background:
- Hypersensitivity pneumonitis (HP) is a complex immune-mediated lung disease.
- Drug-induced HP can manifest with diverse clinical and immunological profiles.
- Identifying specific drug culprits and pathogenic mechanisms is crucial for patient management.
Observation:
- A 51-year-old male with chronic bronchitis developed HP within a month of minocycline, amoxicillin, and erythromycin exposure.
- Re-exposure to minocycline, but not amoxicillin, precipitated interstitial pneumonitis.
- Bronchoalveolar lavage revealed transient eosinophilia/neutrophilia and persistent alveolar lymphocytosis.
Findings:
- Alveolar lymphocytes included CD8+ and CD4+ T cells.
- Elevated CD8+ D44+ cytotoxic T cells appeared rapidly upon minocycline re-challenge.
- CD8+ CD57+ suppressor T cells predominated after drug withdrawal.
- In vitro studies demonstrated lymphocyte-mediated cytotoxicity against minocycline-exposed macrophages.
Implications:
- This case highlights minocycline as a potential cause of drug-induced HP.
- The findings support a significant role for T lymphocytes in the pathogenesis of drug-related HP.
- Understanding these immune mechanisms may guide future therapeutic strategies for HP.
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