Distinct IgM and IgG autoantibody profiles characterize incomplete and classified systemic autoimmune diseases
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By
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Rebecca A. Wood
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Neha Kodali
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Nancy Redinger
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A. Darise Farris
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Christopher J. Lessard
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R. Hal Scofield
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June 17, 2026
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Clinical Scorecard: Unique Profiles of IgM and IgG Autoantibodies Differentiate Incomplete and Established Systemic Autoimmune Disorders
At a Glance
| Category | Detail |
|---|
| Condition | |
| Key Mechanisms | |
| Target Population | Patients with ILE, SLE, nSjD-sicca, SjD, and healthy controls. |
| Care Setting | |
Key Highlights
- ILE shows increased IgM autoreactivity compared to SLE, indicating potential diagnostic value.
- SLE demonstrates enriched IgG responses to nuclear antigens, highlighting disease specificity.
- SjD has significantly increased Ro52 IgG autoantibodies compared to nSjD-sicca, suggesting distinct disease mechanisms.
Guideline-Based Recommendations
Diagnosis
Management
- Consider isotype-specific autoantibody profiles in treatment planning, including glucocorticoids and immunosuppressants.
Monitoring & Follow-up
Risks
Patient & Prescribing Data
Current treatments do not fully address symptoms of SjD and related conditions, particularly in ILE and nSjD-sicca.
Clinical Best Practices
- Employ comprehensive autoantibody testing, such as the GeneCopoeia Human Autoimmune Array, to enhance diagnostic accuracy.
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