RESUMO
In this population-based case-control study conducted in the Chelyabinsk region of Russia, we examined the distribution of HLA-A, -B, -C, -DRB1, -DQB1 and -DPB1, in a group of 100 patients with confirmed COVID-19 bilateral pneumonia. Typing was performed by NGS and statistical calculations were carried out with the Arlequin program. HLA-A, -B, -C, -DRB1, -DQB1 and -DPB1 alleles were compared between patients with COVID-19 and 99 healthy controls. We identified that COVID-19 susceptibility is associated with alleles and genotypes rs9277534A (disequilibrium with HLA-DPB1*02:01, -02:02, -04:01, -04:02, -17:01 alleles) with low expression of protein products HLA-DPB1 (pc < 0.028) and homozygosity at HLA-C*04 (p = 0.024, pc = 0.312). Allele HLA-A*01:01 was decreased in a group of patients with severe forms of bilateral pneumonia, and therefore it may be considered as a protective factor for the development of severe symptoms of COVID-19 (p = 0.009, pc = 0.225). Our studies provide further evidence for the functional association between HLA genes and COVID-19.
Assuntos
COVID-19 , Antígenos de Histocompatibilidade Classe I , Alelos , COVID-19/genética , COVID-19/imunologia , Estudos de Casos e Controles , Frequência do Gene , Antígenos HLA-A/genética , Antígenos HLA-A/imunologia , Antígenos HLA-B/genética , Antígenos HLA-B/imunologia , Antígenos HLA-C/genética , Antígenos HLA-C/imunologia , Antígenos HLA-D/genética , Antígenos HLA-D/metabolismo , Haplótipos , Antígenos de Histocompatibilidade Classe I/genética , Antígenos de Histocompatibilidade Classe I/imunologia , HumanosAssuntos
COVID-19 , Anticorpos Antivirais , Doadores de Sangue , COVID-19/terapia , Humanos , Imunização Passiva , Plasma , Soroterapia para COVID-19RESUMO
The purpose of this work was to establish the distribution of HLA-DPB1 alleles in Russians living in the Chelyabinsk region (Russia). DPB1 frequencies were determined in 100 unrelated Russian, living in the Chelyabinsk region. All subjects were healthy unrelated blood donors, between 18 and 55 years of age. Typing was performed by NGS (DNA-technology, Moscow). For population genetics analysis GENE[RATE] (https://hla-net.eu/tools/) software was used. DPB1*04:01 prevails in this population (gf = 0.3667). Other frequent HLA-DPB1 alleles were: DPB1*04:02, DPB1*02:01, DPB1*03:01 (gf = 0.1490; 0.1481; 0.1385, respectively). Rare alleles (gf ≤ 0.03) were DPB1*17:01, DPB1*01:01, DPB1*06:01, DPB1*14:01, DPB1*05:01, DPB1*13:01, DPB1*09:01, DPB1*10:01, DPB1*11:01, DPB1*23:01, DPB1*124:01, DPB1*15:01, DPB1*16:01, DPB1*105:01, DPB1*150:01.
