Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/27310
Type: Artigo de periódico
Title: An easy and efficient strategy for KEL genotyping in a multiethnic population
Author: Arnoni, Carine Prisco
Muniz, Janaína Guinhem
Paula, Tatiane Aparecida de
Person, Rosangela Duarte de Medeiros
Gazito, Diana
Baleotti Jr, Wilson
Barreto, José Augusto
Castilho, Lilian
Latini, Flavia Roche Moreira
Abstract: BACKGROUND: The Kell blood group system expresses high and low frequency antigens with the most important in relation to transfusion including the antithetic KEL1 and KEL2; KEL3 and KEL4; KEL6 and KEL7 antigens. Kell is a clinically relevant system, as it is highly immunogenic and anti-KEL antibodies are associated with hemolytic transfusion reactions and hemolytic disease of the fetus and newborn. Although required in some situations, Kell antigen phenotyping is restricted due to technical limitations. In these cases, molecular approaches maybe a solution. This study proposes three polymerase chain reaction genotyping protocols to analyze the single nucleotide polymorphisms responsible for six Kell antithetic antigens expressed in a Brazilian population. METHODS: DNA was extracted from 800 blood donor samples and three polymerase chain reaction-restriction fragment length polymorphism protocols were used to genotype the KEL*1/KEL*2, KEL*3/KEL*4 and KEL*6/KEL*7 alleles. KEL*3/KEL*4 and KEL*6/KEL*7 genotyping was standardized using the NlaIII and MnlI restriction enzymes and validated using sequencing. KEL*1/KEL*2 genotyping was performed using a previously reported assay. RESULTS: KEL genotyping was successfully implemented in the service; the following distribution of KEL alleles was obtained for a population from southeastern Brazil: KEL*1 (2.2%), KEL*2 (97.8%), KEL*3 (0.69%), KEL*4 (99.31%), KEL*6 (2.69%) and KEL*7 (97.31%). Additionally, two individuals with rare genotypes, KEL*1/KEL*1 and KEL*3/KEL*3, were identified. CONCLUSION: KEL allele genotyping using these methods proved to be reliable and applicable to predict Kell antigen expressions in a Brazilian cohort. This easy and efficient strategy can be employed to provide safer transfusions and to help in rare donor screening.
Subject: Kell blood-group system
Molecular biology
Gene frequency
Erythrocytes
Polymerase chain reaction
Editor: Associação Brasileira de Hematologia e Hemoterapia e daSociedade Brasileira de Transplante de Medula Óssea
Rights: aberto
Identifier DOI: 10.5581/1516-8484.20130029
Address: http://dx.doi.org/10.5581/1516-8484.20130029
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-84842013000200010
Date Issue: 1-Jan-2013
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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