Hemoglobin Loves Park [β68 (E12) Leu→Phe]: Report of five cases including one originating from a de novo mutation

Cristina Ferreira, James D. Hoyer, Armandina Miranda, Isabel Picanço, Vanda Almendra, Maria Teresa Seixas, Teresa Almeida, Luísa Romão, Paula Faustino

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Hemoglobin (Hb) Loves Park [β68 (E12) Leu→Phe] was identified in a 2-year-old Portuguese boy with anemia, microcytosis, and hypochromia. This Hb variant was detected by isoelectric focusing and quantified by reverse-phase high-performance liquid chromatography (HPLC) (48.4%), and the DNA mutation was identified by HBB (β-globin gene) sequencing. Hematological and biochemical analyses performed on his parents revealed normal hematological parameters and normal hemoglobin and globin chain profiles. DNA sequence analysis of the HBB gene of both parents showed the absence of the Hb Loves Park mutation. Study of the haplotypes in the β-globin gene cluster confirmed parenthood. Moreover, paternity was confirmed by the study of nine short tandem repeats (STRs) and four variable-number tandem repeat (VNTRs) loci. The most likely explanation for these results is that the Hb Loves Park mutation has occurred de novo in this family. The original American cases of Hb Loves Park, from a family of Italian origin, which were never published, as well as two additional cases, are also included in this report. Functional studies revealed that Hb Loves Park is stable and has a decreased oxygen affinity.

Original languageEnglish (US)
Pages (from-to)256-261
Number of pages6
JournalAmerican journal of hematology
Issue number4
StatePublished - Apr 2006


  • De novo mutation
  • HBB gene
  • Hemoglobin variant
  • Hemoglobinopathies

ASJC Scopus subject areas

  • Hematology


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