https://observatorio.fm.usp.br/handle/OPI/29948
Title: | High frequency of variant RHD genotypes among donors and patients of mixed origin with serologic weak-D phenotype |
Authors: | DEZAN, Marcia Regina; OLIVEIRA, Valeria B.; GOMES, Carolina Nunes; LUZ, Fabio; GALLUCCI, Antonio J.; BONIFACIO, Silvia L.; ALENCAR, Cecilia Salete; SABINO, Ester C.; PEREIRA, Alexandre C.; KRIEGER, Jose E.; ROCHA, Vanderson; MENDRONE-JUNIOR, Alfredo; DINARDO, Carla L. |
Citation: | JOURNAL OF CLINICAL LABORATORY ANALYSIS, v.32, n.9, article ID e22596, 8p, 2018 |
Abstract: | Background Goal The current transfusion policy recommended for individuals with serologic weak-D phenotype is based on data derived from European-descent populations. Data referring to the distribution of RH alleles underlying weak-D phenotype among people of mixed origin are yet incomplete, and the applicability of European-based transfusion guidelines to this specific population is questionable. To evaluate the distribution of RHD variant genotype among individuals with serologic weak-D phenotype of both African and European descent. Methods Results Donors and patients of mixed origin and with serologic weak-D phenotype were selected for the study. They were investigated using conventional RHD-PCR assays and RHD whole-coding region direct sequencing. One hundred and six donors and 58 patients were included. There were 47 donors and 29 patients with partial-D genotype (47/106, 44.3%, and 29/58, 50%, respectively). RHD*DAR and RHD*weak D type 38 represented the most common altered RHD alleles among donors (joint frequency of 39.6%), while weak D types 1-3 accounted for 10.4% of the total D variant samples. RHD*DAR was the most common allele identified in the patient group (frequency of 31%), and weak D types 1-3 represented 29.3% of the total. Conclusion The frequency of partial D among mixed individuals with serologic weak-D phenotype is high. They should be managed as D-negative patients until molecular tests are complete. |
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art_DEZAN_High_frequency_of_variant_RHD_genotypes_among_donors_2018.PDF Restricted Access | publishedVersion (English) | 800.28 kB | Adobe PDF | View/Open Request a copy |
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