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HLA profile in paediatric ITP: Comparison with healthy controls and prognostic implications
Jesús González de Pablo1, Yessenia L Molina1, José Luis Vicario2
1Department of Pediatric Hematology and Oncology, Hospital Infantil Universitario Niño Jesús, Fundación Para la Investigación Biomédica del Hospital Infantil Universitario Niño Jesús, Madrid, Spain.
British Journal of Haematology
|April 29, 2026
Summary
Human leucocyte antigen (HLA) typing may help predict susceptibility and outcomes in immune thrombocytopenia (ITP). Certain HLA alleles are linked to increased ITP risk, while others may offer protection or influence recovery and chronicity.
Area of Science:
- Immunogenetics
- Autoimmune Diseases
- Pediatric Hematology
Background:
- Immune thrombocytopenia (ITP) is an autoimmune disorder causing low platelet counts.
- The association between human leucocyte antigen (HLA) alleles and ITP susceptibility and outcomes remains inconsistent.
- Understanding the role of HLA in ITP is crucial for potential diagnostic and prognostic applications.
Purpose of the Study:
- To investigate the association between HLA alleles and susceptibility to childhood primary ITP.
- To evaluate the correlation between specific HLA alleles and clinical outcomes, including recovery and chronicity, in pediatric ITP patients.
Main Methods:
- Retrospective observational study comparing HLA typing in 135 pediatric ITP patients and 929 healthy controls.
- Statistical analysis to identify significant associations between HLA alleles and ITP risk.
- Further analysis to correlate HLA alleles with recovery rates and the probability of developing chronic ITP.
Main Results:
- HLA-DRB1*07 and HLA-DRB1*13 alleles were more frequent in controls, suggesting a protective effect against ITP.
- HLA-A*68, HLA-B*40, and HLA-DRB1*14 alleles were associated with an increased risk of developing ITP.
- Specific alleles (HLA-A*26, HLA-C*03) and supertypes (HLA-A02) correlated with recovery rates and chronicity, respectively.
Conclusions:
- HLA typing may serve as a valuable tool for assessing ITP susceptibility and predicting patient outcomes.
- Certain HLA alleles demonstrate a significant role in the pathogenesis and clinical course of pediatric ITP.
- Larger-scale studies are warranted to confirm these findings and their clinical utility in managing ITP.
