Sickle cell disease in a carrier with pyruvate kinase deficiency
N Alli, M Coetzee, Vernon Louw, Ben van Rensburg, Gerrit Rossouw, L. Thompson, Serge Pissard, Swee Lay Thein
Abstract
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N Alli, M Coetzee, Vernon Louw, Ben van Rensburg, Gerrit Rossouw, L. Thompson, Serge Pissard, Swee Lay Thein
Abstract
Open-access reader
We report a case of sickle cell disease (SCD) in a patient who is a carrier for the sickle mutation with no additional mutations in the beta globin genes. Sequencing of the PK-LR genes showed that she was also heterozygous for the L272V mutation in exon 7, which is known to cause pyruvate kinase (PK) deficiency. It appeared that sickling in the heterozygous state is related to decreased oxygen affinity associated with PK deficiency in this unusual case.
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We report a case of sickle cell disease (SCD) in a patient who is a carrier for the sickle mutation with no additional mutations in the beta globin genes. Sequencing of the PK-LR genes showed that she was also heterozygous for the L272V mutation in exon 7, which is known to cause pyruvate kinase (PK) deficiency. It appeared that sickling in the heterozygous state is related to decreased oxygen affinity associated with PK deficiency in this unusual case.
Key concepts: Pyruvate kinase deficiency, Pyruvate kinase, Mutation, Heterozygote advantage, Exon, Gene, Hemolytic anemia, Hemoglobinopathy