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A novel framework for human leukocyte antigen (HLA) genotyping using probe capture-based targeted next-generation
Sheng-Kai Lai1,2, Allen Chilun Luo2, I-Hsuan Chiu2
1Genome and Systems Biology Degree Program, Academia Sinica and National Taiwan University, Taipei, Taiwan.
Computational and Structural Biotechnology Journal
|April 23, 2024
Summary
Accurate human leukocyte antigen (HLA) typing is crucial for immunology. This study developed a targeted next-generation sequencing method using the Human Pan-Genome Reference Consortium (HPRC) data, achieving 100% accuracy for 11 HLA genes.
Area of Science:
- Genomics and Immunogenetics
- High-throughput molecular diagnostics
Background:
- Human leukocyte antigen (HLA) genes are critical for immune responses and transplantation.
- High-throughput HLA typing is challenging due to extensive polymorphism.
- The Human Pan-Genome Reference Consortium (HPRC) offers a valuable resource for genomic studies.
Purpose of the Study:
- To evaluate the HPRC as a benchmark for HLA typing reference materials.
- To develop and validate a targeted next-generation sequencing (NGS) approach for high-resolution HLA genotyping.
- To compare the accuracy of targeted NGS with short-read whole-genome sequencing (WGS).
Main Methods:
- Annotation of 4-field resolution HLA alleles for 11 genes in 44 HPRC samples.
- Capture-based targeted sequencing using HLA-specific probes.
- Comparative analysis with short-read WGS data and evaluation of seven HLA genotyping software tools (OptiType, HLA-VBseq, HISAT genotype, SpecHLA, T1K, QzType, DRAGEN).
Main Results:
- Comprehensive 4-field HLA allele annotation for 44 HPRC samples was achieved.
- Targeted NGS demonstrated superior accuracy over conventional short-read WGS for HLA typing.
- An integrated analysis pipeline (QzType, T1K, DRAGEN) yielded 100% accuracy for all 11 targeted HLA genes.
Conclusions:
- Targeted short-read sequencing combined with computational analysis provides a robust method for HLA genotyping.
- The HPRC cohort serves as a valuable assembly-based reference for HLA typing validation.
- This approach enhances accuracy and efficiency in high-throughput HLA typing for immunological applications.
