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Pedroso GA, Kimura EM, Santos MNN, Albuquerque DM, Ferruzzi JLH, Jorge SE, Costa FF, Saad STO, Sonati MF. Coinheritance of Hb Bristol-Alesha [β67(E11)Val→Met; HBB: c.202G>A] and the α212 Patchwork Allele in a Brazilian Child with Severe Congenital Hemolytic Anemia. Hemoglobin 2017; 41:203-208. [PMID: 28670945 DOI: 10.1080/03630269.2017.1340305] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Hb Bristol-Alesha [HBB: c.202G>A; β 67 Val>Met] is a rare structural variant of hemoglobin (Hb) resulting from a GTG>ATG substitution at codon 67 of the β-globin gene that leads to the replacement of valine by methionine in the corresponding position of the β-globin chain. The methionine residue is subsequently modified to aspartic acid [β67(E11)Val-Met→Asp], possibly by autoxidation mechanisms. This substitution prevents normal non-polar binding of Val67 to the heme group, resulting in molecular instability and severe hemolysis. We identified Hb Bristol-Alesha (in the heterozygous state), as the cause of severe congenital hemolytic anemia in an 11-month-old girl of mixed (native Indian and European) ethnic origin from the Midwestern region of Brazil, whose parents were clinically and hematologically normal. The mutation on the β-globin gene was found to have been coinherited with the α212 patchwork allele.
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Affiliation(s)
- Gisele A Pedroso
- a Hemoglobinopathies Laboratory, Department of Clinical Pathology , School of Medical Sciences, State University of Campinas (UNICAMP), Campinas , São Paulo , Brazil
| | - Elza M Kimura
- a Hemoglobinopathies Laboratory, Department of Clinical Pathology , School of Medical Sciences, State University of Campinas (UNICAMP), Campinas , São Paulo , Brazil
| | - Magnun N N Santos
- a Hemoglobinopathies Laboratory, Department of Clinical Pathology , School of Medical Sciences, State University of Campinas (UNICAMP), Campinas , São Paulo , Brazil
| | - Dulcinéia M Albuquerque
- b Hematology and Hemotherapy Center, State University of Campinas (UNICAMP), Campinas , São Paulo , Brazil
| | - Jucilane L H Ferruzzi
- c University Hospital, Federal University of Grande Dourados (UFGD), Dourados , Mato Grosso do Sul , Brazil
| | - Susan E Jorge
- a Hemoglobinopathies Laboratory, Department of Clinical Pathology , School of Medical Sciences, State University of Campinas (UNICAMP), Campinas , São Paulo , Brazil
| | - Fernando F Costa
- b Hematology and Hemotherapy Center, State University of Campinas (UNICAMP), Campinas , São Paulo , Brazil
| | - Sara T O Saad
- b Hematology and Hemotherapy Center, State University of Campinas (UNICAMP), Campinas , São Paulo , Brazil
| | - Maria F Sonati
- a Hemoglobinopathies Laboratory, Department of Clinical Pathology , School of Medical Sciences, State University of Campinas (UNICAMP), Campinas , São Paulo , Brazil
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