Characterisation of the Novel HLA-DRB1*13:374 Allele by Next-Generation Sequencing

Area of Science:

• Immunogenetics
• Molecular Biology

Background:

• The human leukocyte antigen (HLA) system plays a critical role in immune response.
• Polymorphisms within HLA genes, particularly HLA-DRB1, are associated with various autoimmune diseases and transplant outcomes.

Purpose of the Study:

• To report the characterization of a newly identified HLA-DRB1 allele, designated HLA-DRB1*13:374.
• To detail the specific genetic variations differentiating this new allele from previously described alleles.

Main Methods:

• High-resolution HLA typing was performed using next-generation sequencing.
• Sequence analysis focused on identifying nucleotide differences within the coding regions, specifically exon 3.

Main Results:

• A novel HLA-DRB1 allele, HLA-DRB1*13:374, was discovered.
• This new allele exhibits three distinct nucleotide substitutions compared to the reference allele HLA-DRB1*13:01:40.
• These substitutions are localized within exon 3 of the HLA-DRB1 gene.

Conclusions:

• The identification of HLA-DRB1*13:374 expands the known HLA allele repertoire.
• Understanding these specific genetic variations is crucial for accurate HLA typing and its implications in clinical immunology and transplantation.