» Articles » PMID: 11156543

Autoantibody Profiles in the Sera of European Patients with Myositis

Abstract

Objective: To determine the prevalence of myositis specific autoantibodies (MSAs) and several myositis associated autoantibodies (MAAs) in a large group of patients with myositis.

Methods: A total of 417 patients with myositis from 11 European countries (198 patients with polymyositis (PM), 181 with dermatomyositis (DM), and 38 with inclusion body myositis (IBM)) were serologically analysed by immunoblot, enzyme linked immunosorbent assay (ELISA) and/or immunoprecipitation.

Results: Autoantibodies were found in 232 sera (56%), including 157 samples (38%) which contained MSAs. The most commonly detected MSA was anti-Jo-1 (18%). Other anti-synthetase, anti-Mi-2, and anti-SRP autoantibodies were found in 3%, 14%, and 5% of the sera, respectively. A relatively high number of anti-Mi-2 positive PM sera were found (9% of PM sera). The most commonly detected MAA was anti-Ro52 (25%). Anti-PM/Scl-100, anti-PM/Scl-75, anti-Mas, anti-Ro60, anti-La, and anti-U1 snRNP autoantibodies were present in 6%, 3%, 2%, 4%, 5%, and 6% of the sera, respectively. Remarkable associations were noticed between anti-Ro52 and anti-Jo-1 autoantibodies and, in a few sera, also between anti-Jo-1 and anti-SRP or anti-Mi-2 autoantibodies.

Conclusions: The incidence of most of the tested autoantibody activities in this large group of European patients is in agreement with similar studies of Japanese and American patients. The relatively high number of PM sera with anti-Mi-2 reactivity may be explained by the use of multiple recombinant fragments spanning the complete antigen. Furthermore, our data show that some sera may contain more than one type of MSA and confirm the strong association of anti-Ro52 with anti-Jo-1 reactivity.

Citing Articles

Refractory Severe Anti-SRP Myopathy that Improved with Long-term Rehabilitation Therapy: A Case Report.

Nakao Y, Ibe Y, Tazawa M, Arii H, Toyama R, Shirayoshi T Prog Rehabil Med. 2025; 10():20250003.

PMID: 39845980 PMC: 11745824. DOI: 10.2490/prm.20250003.


Clinical characteristics of idiopathic inflammatory myopathies related to anti-SRP: a single center experience.

Tang Q, Xie X, He J, Li F, Chen J, Mao N Sci Rep. 2024; 14(1):25788.

PMID: 39468198 PMC: 11519947. DOI: 10.1038/s41598-024-74940-1.


Association of anti-Ro-52 antibodies with occurrence of interstitial lung disease in patients with idiopathic inflammatory myopathy.

Weng C, Huang T, Wu C, Sun Y Arthritis Res Ther. 2024; 26(1):152.

PMID: 39175076 PMC: 11340136. DOI: 10.1186/s13075-024-03382-x.


Roles of TRIM21/Ro52 in connective tissue disease-associated interstitial lung diseases.

Gong X, He S, Cai P Front Immunol. 2024; 15:1435525.

PMID: 39165359 PMC: 11333224. DOI: 10.3389/fimmu.2024.1435525.


Distinct Transcript-Level Expression Profiles and Unique Alternative Splicing in Inflammatory Myopathies.

Najjar R, Alessi H, Pinal-Fernandez I, Mammen A, Mustelin T ACR Open Rheumatol. 2024; 6(10):690-699.

PMID: 39073022 PMC: 11471943. DOI: 10.1002/acr2.11724.


References
1.
Ben-Chetrit E, Fox R, Tan E . Dissociation of immune responses to the SS-A (Ro) 52-kd and 60-kd polypeptides in systemic lupus erythematosus and Sjögren's syndrome. Arthritis Rheum. 1990; 33(3):349-55. DOI: 10.1002/art.1780330307. View

2.
Targoff I, Johnson A, Miller F . Antibody to signal recognition particle in polymyositis. Arthritis Rheum. 1990; 33(9):1361-70. DOI: 10.1002/art.1780330908. View

3.
Alderuccio F, Chan E, Tan E . Molecular characterization of an autoantigen of PM-Scl in the polymyositis/scleroderma overlap syndrome: a unique and complete human cDNA encoding an apparent 75-kD acidic protein of the nucleolar complex. J Exp Med. 1991; 173(4):941-52. PMC: 2190817. DOI: 10.1084/jem.173.4.941. View

4.
Dalakas M . Polymyositis, dermatomyositis and inclusion-body myositis. N Engl J Med. 1991; 325(21):1487-98. DOI: 10.1056/NEJM199111213252107. View

5.
Leff R, Burgess S, Miller F, Love L, Targoff I, Dalakas M . Distinct seasonal patterns in the onset of adult idiopathic inflammatory myopathy in patients with anti-Jo-1 and anti-signal recognition particle autoantibodies. Arthritis Rheum. 1991; 34(11):1391-6. DOI: 10.1002/art.1780341108. View