Abstract:
BACKGROUND: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. GOAL:To evaluate the distribution of RHD variant genotype among individuals with serologic weak-D phenotype of both African and European descent. METHODS: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. RESULTS: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.
journal_name
J Clin Lab Analjournal_title
Journal of clinical laboratory analysisauthors
Dezan MR,Oliveira VB,Gomes ÇN,Luz F,Gallucci AJ,Bonifácio SL,Alencar CS,Sabino EC,Pereira AC,Krieger JE,Rocha V,Mendrone-Junior A,Dinardo CLdoi
10.1002/jcla.22596subject
Has Abstractpub_date
2018-11-01 00:00:00pages
e22596issue
9eissn
0887-8013issn
1098-2825journal_volume
32pub_type
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