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IFN-α Neutralizing Antibodies Distinguish LADA From Early-onset Type 1 Diabetes.
Rocco Amendolara1,2, Luca D'Onofrio1, Rosario Luigi Sessa1
1Department of Experimental Medicine, Sapienza University of Rome, 00161 Rome, Italy.
The Journal of Clinical Endocrinology and Metabolism
|January 6, 2025
Summary
Autoantibodies against Interferon-alpha (AAb-IFN-α) are more common in Latent Autoimmune Diabetes in Adults (LADA) than Type 1 Diabetes (T1D). This suggests a distinct autoimmune profile in LADA, potentially influencing disease progression.
Area of Science:
- Immunology
- Endocrinology
- Autoimmune Diseases
Background:
- Autoantibodies against Interferon-alpha (AAb-IFN-α) may be linked to less aggressive autoimmunity in Latent Autoimmune Diabetes in Adults (LADA) compared to early-onset Type 1 Diabetes (T1D).
- Investigating AAb-IFN-α presence and clinical relevance in LADA versus T1D is crucial for understanding disease heterogeneity.
Purpose of the Study:
- To determine the prevalence of AAb-IFN-α in LADA and T1D patients.
- To explore the clinical and biochemical associations of AAb-IFN-α positivity in LADA.
Main Methods:
- Serum samples from 41 LADA and 90 T1D participants were analyzed for AAb against Interferon-alpha (IFN-α) isoforms using a cell-based assay.
- Statistical analysis compared positivity rates and correlated AAb levels with clinical parameters like fasting blood glucose, HbA1c, and GADA levels.
Main Results:
- AAb-IFN-α positivity against two or more isoforms was significantly higher in LADA (17.1% and 12.2%) compared to T1D (3.3% and 0%, respectively; p<0.05).
- In LADA patients positive for AAb-IFN-α, fasting blood glucose and HbA1c levels were numerically lower.
- AAb against IFN-α2 isoform showed an inverse correlation with GADA levels in LADA patients (rho=-0.513; p=0.025).
Conclusions:
- Autoimmunity against IFN-α is characteristic of autoimmune diabetes, particularly its slowly progressive forms like LADA.
- Identifying this distinct autoimmunity in LADA opens avenues for understanding molecular mechanisms and developing targeted therapies.
- Further research into the clinical significance of AAb-IFN-α could advance personalized medicine approaches for autoimmune diseases.
Keywords:
IFN-αLADAT1Dautoimmunitylatent autoimmune diabetes in adultsneutralizing antibodytype 1 diabetesMore Related Videos
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