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HLA-DRB1 alleles in Kuwaiti children with idiopathic nephrotic syndrome
A A Al-Eisa1, M Z Haider, B S Srivasta
1Pediatric Department, Faculty of Medicine, Kuwait University, Safat. Amal@hsc.kuniv.edu.kw
Insights
The HLA-DRB1*0701 allele is linked to earlier onset and shorter remission in Kuwaiti children with idiopathic nephrotic syndrome. This genetic factor may predispose children to a more prolonged disease course.
Area of Science:
- Immunogenetics
- Pediatric Nephrology
- Clinical Medicine
Background:
- Idiopathic nephrotic syndrome (INS) is a significant kidney disease in children.
- Genetic factors, particularly Human Leukocyte Antigen (HLA) alleles, are implicated in INS pathogenesis.
- Understanding genetic predispositions can inform disease management and prognosis.
Purpose of the Study:
- To investigate the association between specific HLA-DRB1 alleles and the clinical presentation of INS in Kuwaiti Arab children.
- To determine if HLA-DRB1*0701 influences disease severity, steroid response, and disease course.
Main Methods:
- Case-control study involving 61 Kuwaiti Arab children diagnosed with INS.
- HLA-DRB1 allele typing was performed on patients and 59 healthy controls.
- Clinical data including age of onset, steroid sensitivity, and remission periods were analyzed.
Main Results:
- The HLA-DRB1*0701 allele was significantly more prevalent in children with INS (67%) compared to controls (17%) (p<0.001).
- No significant association was found between HLA-DRB1*0701 and steroid sensitivity, dependency, or resistance.
- Patients positive for HLA-DRB1*0701 exhibited a lower mean age of onset (35 vs. 53 months) and shorter remission duration (8 vs. 29 months).
Conclusions:
- The HLA-DRB1*0701 allele is a significant risk factor for developing INS in Kuwaiti Arab children.
- This allele is associated with a more aggressive disease phenotype, characterized by earlier onset and poorer remission.
- Genetic screening for HLA-DRB1*0701 may aid in predicting disease course and guiding therapeutic strategies for pediatric INS.
Abstract:
We have studied the effect of HLA-DRB1 alleles on the clinical presentation of 61 Kuwaiti Arab children with idiopathic nephrotic syndrome. DR7(*0701) was the most prevalent DR allele, found in 41/61 patients (67%) compared with 10/59 healthy controls (17%) (p<0.001). DR3(*0301-0308) allele was the second most common, found in 25% of patients compared with 26% of controls (not significant). There was no significant difference between DRB1*0701(DR7)-positive and DRB1*0701-negative patients in terms of steroid sensitivity, steroid dependency, or steroid resistance. Nevertheless, the former group had a significantly lower mean age of onset (35 months vs 53 months) and a shorter remission period following treatment with cyclophosphamide or chlorambucil (8 months vs 29 months). Our data highlight the role of the DRB 1*0701 allele in predisposing Kuwaiti Arab children with idiopathic nephrotic syndrome to a more prolonged course of the disease.