NDLI: Anti-carbamylated protein antibodies in systemic sclerosis

Content Provider	Springer Nature : BioMed Central
Author	Liem, Sophie I. E. Hoekstra, E. M. Levarht, E. W. Nivine Dorjee, Annemarie L. Scherer, Hans U. Toes, René E. M. Huizinga, Tom W. J. de Vries-Bouwstra, Jeska K. Fehres, Cynthia M.
Abstract	Background To investigate the presence of different isotypes of anti-carbamylated protein (CarP) antibodies in systemic sclerosis (SSc) patients and its association with skin involvement. Methods Sera of 194 SSc patients from the Leiden CCISS cohort, fulfilling ACR/EULAR 2013 criteria and a clinical diagnosis of SSc, 83 patients with other connective tissue diseases/Raynaud’s Phenomenon, 24 rheumatoid arthritis patients and 98 age and sex-matched healthy controls were tested for the presence of anti-CarP IgG, IgA and IgM, determined by ELISA. Clinical characteristics, that were evaluated in SSc patients, included age, anti-topoisomerase antibodies (ATA), anti-centromere antibodies (ACA) and modified Rodnan Skin Score (mRSS). Results The SSc patients were 55 (SD:13) years and 155 (80%) were female. Forty-four (23%) patients tested positive for ATA, and 80 (42%) ACA. The median mRSS was 2 (range: 0; 47). Prevalence of anti-CarP IgG was higher in SSc patients than in healthy controls (8% vs 3%, p = 0.007. Prevalence of anti-CarP IgA and IgM and levels of anti-CarP isotypes were comparable between SSc patients and healthy controls. Fifteen (8%) SSc patients tested positive for anti-CarP IgG, 16 (8%) for anti-CarP IgA, and 36 (19%) for anti-CarP IgM. There were no significant correlations between age and levels of anti-CarP isotypes. No correlation between anti-CarP IgG levels and mRSS was found (r = 0.141, p = 0.049), nor for anti-CarP IgM and IgA levels. Anti-CarP IgA levels were higher in ATA compared to ACA positive SSc patients (ATA: 616 aU/ml [359; 1103]; ACA: 424 aU/ml [300; 673], p = 0.015). Conclusion SSc patients can test positive for Anti-CarP IgG, IgA and IgM. We do not observe a relevant clinical association between anti-CarP antibody response and skin involvement in SSc.
Related Links	https://arthritis-research.biomedcentral.com/counter/pdf/10.1186/s13075-023-03099-3.pdf
Ending Page	8
Page Count	8
Starting Page	1
File Format	HTM / HTML
ISSN	14786362
DOI	10.1186/s13075-023-03099-3
Journal	Arthritis Research & Therapy
Issue Number	1
Volume Number	25
Language	English
Publisher	BioMed Central
Publisher Date	2023-07-21
Access Restriction	Open
Subject Keyword	Rheumatology Orthopedics Systemic sclerosis Anti-carbamylated protein antibodies Skin involvement
Content Type	Text
Resource Type	Article
Subject	Immunology and Allergy Immunology Rheumatology
Journal Impact Factor	4.4/2023
5-Year Journal Impact Factor	4.9/2023

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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