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Type: Artigo de periódico
Title: RHD Allelic Identification Among D-Brazilian Blood Donors as a Routine Test Using Pools of DNA
Author: Mota, M
Dezan, M
Valgueiro, MC
Sakashita, AM
Kutner, JM
Castilho, L
Abstract: Background: RHD alleles leading to a reduced expression of D antigen of the red blood cell (RBC) surface may be erroneously typed as D- by serology and may cause anti-D immunizations when transfused to recipients. Methods: To determine the occurrence of such alleles among apparent D- blood donors, molecular typing was implemented as a routine test using a pool of DNA. A total of 2,450 pretyped D- samples were tested in pools of 10 for the RHD-specific polymorphism in intron 4 and exon 7. Samples in polymer chain reaction (PCR) positive pools were individually reevaluated by exon-specific PCRs, sequencing, and serologic methods. Results: Among 2,450 serologically D- blood donor samples tested, 101 (4.1%) carried the RHD gene. Nonfunctional RHD (RHD psi, RHD*CE(2-9)-D, and RHD*CE(37)- D), different weak D alleles such as RHD*weak D type 1, RHD*weak D type 4.3, RHD*weak D type 5, RHD*weak D type 38, and RHD*DEL were identified. Conclusion: We employed a PCR-based assay for RHD as a routine test using pools of ten DNA blood donor samples. The integration of RHD genotyping into the routine screening program using pools of DNA samples was straightforward. As a consequence, 19 (0.8%) blood donors carrying a weak D and Del phenotypes with the potential of causing anti-D immunizations in recipients were reclassified as D+. For each population, it would be necessary to adapt the RHD genotyping strategy to the spectrum of prevalent alleles. J. Clin. Lab. Anal. 26:104-108, 2012. (C) 2012 Wiley Periodicals, Inc.
Subject: pool of DNA
RHD alleles
D antigen
blood donors
Country: EUA
Editor: Wiley-blackwell
Citation: Journal Of Clinical Laboratory Analysis. Wiley-blackwell, v. 26, n. 2, n. 104, n. 108, 2012.
Rights: fechado
Identifier DOI: 10.1002/jcla.21489
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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