Volume 101, Issue 3 pp. 262-269
ORIGINAL ARTICLE

Genetic landscape of human neutrophil antigen variants in India from population-scale genomes

Mercy Rophina

Mercy Rophina

CSIR-Institute of Genomics and Integrative Biology, New Delhi, India

Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India

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Rahul C. Bhoyar

Rahul C. Bhoyar

CSIR-Institute of Genomics and Integrative Biology, New Delhi, India

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Mohamed Imran

Mohamed Imran

CSIR-Institute of Genomics and Integrative Biology, New Delhi, India

Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India

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Vigneshwar Senthivel

Vigneshwar Senthivel

CSIR-Institute of Genomics and Integrative Biology, New Delhi, India

Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India

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Mohit Kumar Divakar

Mohit Kumar Divakar

CSIR-Institute of Genomics and Integrative Biology, New Delhi, India

Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India

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Anushree Mishra

Anushree Mishra

CSIR-Institute of Genomics and Integrative Biology, New Delhi, India

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Bani Jolly

Bani Jolly

CSIR-Institute of Genomics and Integrative Biology, New Delhi, India

Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India

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Sridhar Sivasubbu

Sridhar Sivasubbu

CSIR-Institute of Genomics and Integrative Biology, New Delhi, India

Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India

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Vinod Scaria

Corresponding Author

Vinod Scaria

CSIR-Institute of Genomics and Integrative Biology, New Delhi, India

Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India

Correspondence

Vinod Scaria, CSIR Institute of Genomics and Integrative Biology, Mathura Road, Delhi 110025, India.

Email: [email protected]

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First published: 11 December 2022

Funding information: The Council of Scientific and Industrial Research, India, Grant/Award Number: MLP2001/GenomeApp

Abstract

Antibodies against human neutrophil antigens (HNAs) play a significant role in various clinical conditions such as neonatal alloimmune neutropenia, transfusion-related acute lung injury, and other nonhemolytic transfusion reactions. This study aims to identify the genotype and allele frequencies of HNAs in the healthy Indian population. Ten genetic variants in four human genes encoding alleles of HNAs class I–V approved by the International Society of Blood Transfusion—Granulocyte Immunobiology Working Party were used in the analysis. Genetic variants from whole genome sequences of 1029 healthy Indian individuals corresponding to HNA alleles were analyzed. The frequencies of the variants were compared with global population datasets using an in-house computational pipeline. In HNA class I, allele frequencies of FCGR3B*01, FCGR3B*02, and FCGR3B*03 encoding HNA-1a, HNA-1b, and HNA-1c were 0.07, 0.8, and 0.13, respectively. HNA class 3 alleles namely SLC44A2*01 (encoding HNA-3a) and SLC44A2*02 (encoding HNA-3b) were found at allele frequencies of 0.78 and 0.22, respectively. The frequencies of ITGAM*01 encoding HNA-4a and ITGAM*02 encoding HNA-4a were 0.95 and 0.05, respectively. Furthermore, allele frequencies of HNA class 5 alleles were 0.32 for ITGAL*01 (encoding HNA-5a) and 0.68 for ITGAL*02 (encoding HNA-5b). Interestingly, it was also found that rs2230433 variant deciding the HNA class 5 alleles, was highly prevalent (78.2%) in the Indian population compared with other global populations. This study presents the first comprehensive report of HNA allele and genotype frequencies in the Indian population using population genome datasets of 1029 individuals. Significant difference was observed in the prevalence of HNA5a and HNA5b in India in comparison to other global populations.

CONFLICT OF INTEREST

The authors declare that they have no competing interests.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are openly available in Indigenomes at https://clingen.igib.res.in/indigen/.

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