Abstract
This review highlights the 30 plus years research progress since the discovery of autoantibody to Ro52/TRIM21 in patients with systemic lupus erythematosus (SLE) and Sjögren’s syndrome (SjS). After the initial expression cloning of the Ro52 cDNA, it has taken many years to the current understanding in the interesting biological function of Ro52 as an E3 ubiquitin ligase and its role in innate immune clearance of intracellular IgG-bound complex. Early observations show that anti-Ro52, mostly associated with anti-SS-A/Ro60 and/or anti-SS-B/La, is commonly found in SLE (40–70%), SjS (70–90%), neonatal lupus erythematosus (NLE, 75–90%), and subacute cutaneous lupus erythematosus (50–60%). Anti-Ro52 has long been postulated to play a direct pathogenic role in congenital heart block in NLE as well as in the QT interval prolongation in some adults. The widespread availability of the anti-Ro52 assay has led to the detection of anti-Ro52 in other diseases including autoimmune hepatitis (20–40%), systemic sclerosis (10–30%), and autoimmune myositis (20–40%). More than ten studies have pointed to an association of anti-Ro52 with interstitial lung disease and, more importantly, correlating with poor outcome and worse survival. Other studies are implicating an interesting role for anti-Ro52 in the diagnosis of certain cancers. Future studies are needed to examine the mechanism in the pathogenesis of anti-Ro52 and carefully documenting its causal relationships in different disease conditions.
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Abbreviations
- ANA:
-
Antinuclear antibodies
- ARS:
-
Aminoacyl-tRNA synthetase
- AS:
-
Antisynthetase syndrome
- CHB:
-
Congenital heart block
- DM:
-
Dermatomyositis
- ELISA:
-
Enzyme-linked immunosorbent assay
- IFA:
-
Indirect immunofluorescence assay
- IIM:
-
Idiopathic inflammatory myopathy
- ILD:
-
Interstitial lung disease
- IP:
-
Immunoprecipitation
- JCA:
-
Juvenile chronic arthritis
- Jo-1:
-
Histidyl-transfer RNA synthetase
- LIA:
-
Line immunoassay
- MCTD:
-
Mixed connective tissue disease
- MDA5:
-
Melanoma differentiation associated gene 5
- MSA:
-
Myositis-specific antibodies
- NLE:
-
Neonatal lupus erythematosus
- PAH:
-
Pulmonary arterial hypertension
- PBC:
-
Primary biliary cholangitis
- PM:
-
Polymyositis
- RNP:
-
Ribonucleoprotein
- SCLE:
-
Subacute cutaneous lupus erythematosus
- SjS:
-
Sjögren’s syndrome
- SARD:
-
Systemic autoimmune rheumatic diseases
- SLA:
-
Soluble liver antigen
- SLE:
-
Systemic lupus erythematosus
- SSc:
-
Systemic sclerosis
- TRIM21:
-
Tripartite-motif protein 21 or Ro52
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Apology in advance for any significant omission. John T. Williams is acknowledged for help with generating Fig. 2.
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Chan, E.K.L. Anti-Ro52 Autoantibody Is Common in Systemic Autoimmune Rheumatic Diseases and Correlating with Worse Outcome when Associated with interstitial lung disease in Systemic Sclerosis and Autoimmune Myositis. Clinic Rev Allerg Immunol 63, 178–193 (2022). https://doi.org/10.1007/s12016-021-08911-z
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DOI: https://doi.org/10.1007/s12016-021-08911-z