Hb Kalundborg [ß79(EF3)AspâGlu; HBB: c.240C>a], a Possible Low-affinity Hemoglobin Variant Detected during Hb A1c Measurement.
Hemoglobin
; 46(2): 124-128, 2022 Mar.
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| MEDLINE
| ID: mdl-35920343
ABSTRACT
A previously unknown hemoglobin (Hb) variant was detected during measurement of glycosylated Hb (Hb A1c) after the introduction of a new high performance liquid chromatography (HPLC) apparatus. Subsequent DNA sequencing revealed a heterozygous single nucleotide substitution at codon 79 (C>A) on the ß-globin gene changing an amino acid [ß79(EF3)AspâGlu; HBB c.240C>A]. The new Hb variant was named Hb Kalundborg after the place of origin of the proband. Heterozygosity for this mutation appears to have no clinical significance in itself except for a possibly slightly lower oxygen affinity. However, it interferes with Hb A1c measurement by HPLC, causing a falsely high Hb A1c concentration when using the G11 apparatus with clinical implications possibly to follow.
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Base de dados:
MEDLINE
Assunto principal:
Hemoglobinas Anormais
/
Hemoglobinopatias
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article