Molecular genetic analysis of Mia -positive hybrid glycophorins revealed two novel alleles of GP.Vw and multiple variant transcripts of GYPB existing in both the homozygous GP.Mur and wild-type GPB individuals.
Transfusion
; 61(8): 2477-2486, 2021 08.
Article
em En
| MEDLINE
| ID: mdl-34117642
ABSTRACT
BACKGROUND:
The hybrid glycophorins of MNS blood group system express a series of low incidence antigens including Mia , which are commonly found in Southeast Asian populations. In this study, the molecular basis of Mia -positive hybrid glycophorins was firstly clarified in the Chinese Southern Han population. RNA transcripts of GYPB gene in the homozygous GP.Mur individuals were also analyzed. STUDY DESIGN ANDMETHODS:
DNAs were extracted from the whole blood samples of 111 Mia -positive donors. Then, high-resolution melting (HRM) analysis for GYP(B-A-B) was used to analyze the genotypes. Sequencing of GYPB pseudoexon 3 was conducted in the samples with variant melting curves. TA-cloning and subsequent sequencing of GYPA exons 2-4 were performed in the Mia -positive samples with normal GYPB/GYPB genotype by HRM. The transcript analysis of GYPB was conducted in homozygous GP.Mur and wild-type glycophorin B (GPB) individuals using RNA extracted from the cultured erythroblast.RESULTS:
The heterozygous GYP*Mur/GYPB (n = 101), homozygous GYP*Mur/GYP*Mur (n = 7) including one novel GYP*Mur allele with an extra GYPA/GYPE specific nucleotide substitution (c.229+110A>T), heterozygous GYP*Bun/GYPB (n = 1) and GYP*Vw/GYPA (n = 2) with two novel GYP*Vw alleles were identified. RNA transcript analysis revealed multiple transcripts of GYPB existing in both homozygous GP.Mur and normal GPB individuals.CONCLUSION:
The results showed the genetic diversity of hybrid glycophorins in the Chinese population. Besides, the successful analysis of GYPB transcripts indicates that the cultured erythroblast is a good source for RNA transcript analysis for the protein only expressed on the red blood cells.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Glicoforinas
/
Sistema do Grupo Sanguíneo MNSs
Limite:
Humans
Idioma:
En
Revista:
Transfusion
Ano de publicação:
2021
Tipo de documento:
Article