Specific HLA genotypes confer susceptibility to acute necrotizing encephalopathy

Area of Science:

• Immunogenetics
• Neurology
• Pediatrics

Background:

• Acute necrotizing encephalopathy (ANE) is a severe neurological disorder often triggered by viral infections.
• A cytokine storm is the primary suspected pathogenetic mechanism.
• ANE's prevalence in East Asia suggests a role for host genetic factors.

Purpose of the Study:

• To investigate the genetic background of ANE in Japanese patients.
• To identify specific human leukocyte antigen (HLA) genotypes associated with ANE susceptibility.

Main Methods:

• Genotyping of HLA-A, C, B, DRB1, DQB1, and DPB1 was performed on 31 Japanese ANE patients.
• Allele frequencies and positivity were compared between patients and controls.

Main Results:

• Significant positive associations were found for HLA-DRB1*09:01 and HLA-DQB1*03:03 alleles in ANE patients.
• The carrier frequency of these alleles was higher in patients (45.16%) than in controls (28.57%).
• These HLA alleles are more prevalent in East Asian populations and linked to autoimmune diseases.

Conclusions:

• Altered immune responses, influenced by individual HLA genotypes, may contribute to the pathogenesis of ANE.
• The findings support a genetic predisposition to ANE in the Japanese population, particularly involving specific HLA alleles.