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Imaging Features of Systemic Sclerosis-Associated Interstitial Lung Disease
Published on: June 16, 2020
Comparative qualitative and quantitative analysis of scleroderma (systemic sclerosis) serologic immunoassays
Lefkothea Picha1, Ioannis Pakas, Apostolia Guialis
1Department of Pathophysiology, Medical School, National University of Athens, 75 Mikras Asias Street 115 27 Athens, Greece.
Journal of Autoimmunity
|August 16, 2008
Summary
This study evaluated different methods for detecting autoantibodies in systemic sclerosis (SSc) patients. Immunoblotting with specific nuclear, nucleolar, and chromosomal extracts proved highly sensitive for various autoantibodies, aiding diagnosis.
Area of Science:
- Immunology
- Autoimmunity
- Biochemistry
Background:
- Systemic sclerosis (SSc) is characterized by diverse autoantibody specificities.
- Accurate detection of these autoantibodies is crucial for diagnosis and management.
- Existing detection methodologies vary in sensitivity and specificity.
Purpose of the Study:
- To evaluate the sensitivity and specificity of different autoantibody detection methods in SSc patients.
- To compare Indirect Immunofluorescence (IIF), Counterimmunoelectrophoresis (CIE), and various Immunoblot (IB) preparations.
- To identify optimal techniques for detecting specific autoantibodies, including anti-Topo I, anti-U3RNP, anti-H1, anti-snRNPs, and ACA.
Main Methods:
- A cohort of 150 SSc patients was analyzed.
- Techniques employed included IIF, CIE, and IB using nuclear, metaphase chromosomal-enriched, nucleolar, and histone extracts.
- RNA precipitation was also utilized.
Main Results:
- IB-nuclear demonstrated the highest frequency for anti-Topoisomerase I (Topo I) antibodies.
- CIE, IB-nucleolar, and IB-MC-pellet showed high sensitivity (89%, 87%, 95%) compared to IB-nuclear.
- IB-MC-pellet uniquely identified ACA, while IB-nucleolar and IB-MC-pellet excelled in detecting anti-U3RNP and anti-H1 antibodies.
Conclusions:
- IB-nuclear is highly sensitive for anti-Topo I antibody determination in SSc.
- CIE serves as a sensitive first-line screening test.
- IB-nucleolar and IB-MC-pellet are valuable for detecting antibodies against nucleolar and chromatin-related components, including a novel 28kD nucleolar protein.
