Spectrum of anti-neutrophil cytoplasmic antibodies in patients with pulmonary tuberculosis overlaps with that of Wegener's granulomatosis.
Indian J Med Sci
;
2004 Jul; 58(7): 283-8
Article
in English
| IMSEAR
| ID: sea-66157
ABSTRACT
BACKGROUND AND OBJECTIVES:
Mycobacterial infections are known to induce the development of autoantibodies and a few of these antibodies are also known to be diagnostic markers for some other diseases and it is uncertain whether these autoantibodies play a role in the pathogenesis of autoimmune disorders. This study was undertaken to determine the prevalence of autoantibodies like anti-neutrophil cytoplasmic antibodies (ANCA), anti-nuclear antibodies (ANA), anti-double stranded antibodies (anti-dsDNA) and anti-histone antibodies (AHA)in pulmonary Tuberculosis. MATERIALS &METHODS:
Seventy consecutive pulmonary TB patients, 30 patients of interstitial lung disease and 100 normal individuals were studied. ANCA and ANA were detected by indirect immunofluorescence test (IIF). Anti-dsDNA and AHA were tested by ELISA.RESULTS:
ANCA was detected in 30% cases, and of these 52.4% showed perinuclear pattern (p-ANCA), 38.1% cytoplasmic (c-ANCA) and 9.5% showed an "atypical" pattern. ANCA specificities by ELISA revealed that, 47.6% had anti-Myeloperoxidase (anti-MPO), 28.6% had anti-Proteinase3 (anti-PR3) and 19.1% had anti-Lactoferrin (anti-LF) antibodies. ANA and AHA were present in 24.3% and 21.4% cases respectively whereas anti-ds DNA antibodies were absent. Normal controls showed 4% and 2% positivity for ANA and ANCA whereas disease control group of ILD showed 7% of ANA and ANCA posititivy.CONCLUSION:
The presence of autoantibodies in TB patients could have a multifactorial etiology. Clinically relevant is the presence of anti-PR3 antibodies. This finding along with pulmonary and renal manifestations could lead to a false diagnosis of Wegener's granulomatosis or vice versa because these autoantibodies may be present in both diseases.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Tuberculosis, Pulmonary
/
Female
/
Humans
/
Male
/
Biomarkers
/
Granulomatosis with Polyangiitis
/
Antibodies, Antinuclear
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Lung Diseases, Interstitial
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Antibodies, Antineutrophil Cytoplasmic
/
Adult
Type of study:
Controlled clinical trial
/
Diagnostic study
Language:
English
Journal:
Indian J Med Sci
Year:
2004
Type:
Article
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