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. 2019 Aug;114(6):605-615.
doi: 10.1111/vox.12789. Epub 2019 May 14.

Molecular matching for patients with haematological diseases expressing altered RHD-RHCE genotypes

Bruno Ribeiro Cruz  1 , Thamy Caroline de Souza Silva  1 , Bianca de Souza Castro  1 , Akemi Kuroda Chiba  1 , Elyse Moritz  1 , Josefina Pellegrini Braga  2 , Maria Stella Figueiredo  1 , José O Bordin  1
Affiliations

Molecular matching for patients with haematological diseases expressing altered RHD-RHCE genotypes

Bruno Ribeiro Cruz et al. Vox Sang. 2019 Aug.

Abstract

Background and objectives: The high homology and the inverted orientation of RHD and RHCE may give rise to non-functional and aberrant RH alleles. RH genotyping is used to screen RH matched donors to African descent patients. This study aimed to define a strategy for testing RHD and RHCE variants in blood donors to provide compatible units for transfusion of patients with haematological diseases.

Materials and methods: Samples from 132 patients [101 Sickle cell disease (SCD), 14 myelodysplastic syndrome (MDS), 17 acute myelogenous leukaemia (AML)] and 198 Brazilian donors were studied. Major blood group alleles, RHD, RHCE alleles and RHD zygosity were determined by the blood-MLPA assay. Sequencing was performed to determine RHD and RHCE variant subtypes. A match was an RH genotype that did not encode Rh antigens absent in the patient, along with matching for ABO, MNS, KEL, FY, JK and DI antigens.

Results: Overall, 7·6% of blood donors and 17.4% of patients presented RH genotypes that predict expression of partial Rh antigens or lack of high prevalence Rh antigens. From 23 patients with clinically relevant RH genotypes, 15 had available matched donors.

Conclusion: We report the presence of clinically relevant RH genotypes in SCD and in non-SCD patients. In our admixed population, many patients carry variant RHCE alleles in heterozygosity with normal RHCE alleles. Thus, our results suggest that donors could be selected based on the normal RH allele.

Keywords: RHCE; RHD; RH variants; blood group genotyping; haematological diseases.

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References

    1. Westhoff CM: The structure and function of the Rh antigen complex. Semin Hematol 2007; 44:42-50
    1. Wagner FF, Flegel WA: RHD gene deletion occurred in the Rhesus box. Blood 2000; 95:3662-3668
    1. Flegel WA: The genetics of the Rhesus blood group system. Blood Transfus 2007; 5:50-57
    1. International Society for Blood Transfusion: Red Cell Immunogenetics and Blood Group Terminology. Available at: http://www.isbtweb.org/working-parties/red-cell-immunogenetics-and-blood... [Last accessed 20 May 2018].
    1. Wagner FF, Gassner C, Müller TH, et al.: Molecular basis of weak D phenotypes. Blood 1999; 93:385-393

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