Journal
ANNALS OF TRANSLATIONAL MEDICINE
Volume 9, Issue 5, Pages -Publisher
AME PUBL CO
DOI: 10.21037/atm-20-5232
Keywords
Biomarkers; cutaneous lupus erythematosus (CLE); systemic lupus erythematosus
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Cutaneous lupus erythematosus (CLE) is a connective tissue disease with diverse clinical presentations, which can occur independently or in conjunction with systemic lupus erythematosus (SLE). Despite extensive studies on potential biomarkers in SLE, few biomarkers for CLE have been identified. Established biomarkers such as anti-SS-A antibody and emerging biomarkers like type I interferon-related proteins and chemokines may aid in diagnosis and tracking disease activity in CLE patients.
Cutaneous lupus erythematosus (CLE) is a connective tissue disease with varying presentations, and clinical sequelae including itching, dyspigmentation, and scarring. CLE can occur as its own entity or in conjunction with systemic disease, known as systemic lupus erythematosus (SLE). Because CLE is clinically diverse, identification of a biomarker may help not only facilitate early diagnosis and management but also identify individuals at risk for poor prognosis and development of SLE. While potential biomarkers in SLE have been extensively studied, few biomarkers for CLE have been identified and incorporated into clinical practice. Anti-SS-A antibody is a commonly used biomarker for diagnosis of subacute CLE patients. Type I interferon-related proteins such as MxA and guanylate binding protein-1 (GBP-1) and chemokines such as CXCR3, CXCL9, and CXCL10 have been identified as biomarkers that may support diagnosis and track disease activity. First-line oral treatment for CLE currently consists of anti-malarials such as hydroxychloroquine (HCQ), chloroquine (CQ), and quinacrine (QC). Studies have found that an increased myeloid dendritic cell population with higher TNF-alpha expression may be predictive of poor treatment response to HCQ in CLE patients. Autoantibodies against nuclear antigens (e.g., anti-double-stranded DNA and anti-Smith antibodies) and elevated erythrocyte sedimentation rate have been more commonly found in CLE patients progressing to SLE than those who have not. This review aims to summarize previous and emerging biomarkers for CLE patients.
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