Hematological effects of atypical and cameroon β-globin gene haplotypes in adult sickle cell anemia

M. H. Steinberg, Z. H. Lu, R. L. Nagel, S. Venkataramani, P. P. Milner, L. Huey, S. Safaya, R. F. Rieder

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23 Scopus citations


To examine the effects of unusual or atypical β-globin gene cluster haplotypes on the hematological features and Hb F levels of sickle cell anemia, we studied African Americans who had an atypical or Cameroon haplotype chromosome in association with a typical haplotype. We identified over 20 atypical haplotypes. The distribution of 5' subhaplotypes of the atypical chromosomes mirrored the distribution of common haplotypes in African Americans with sickle cell anemia. Neither 5' nor 3' subhaplotypes of the atypical chromosomes affected Hb F levels, packed cell volume, or mean corpuscular volume in individuals with a Benin chromosome. That the 5' subhaplotype is unaffected might be a consequence of the small numbers of Senegal 5' subhaplotypes in our sample, the need for linkage of both 5' and 3' subhaplotypes of any haplotype for an effect on Hb F to be present, or the likelihood that a normal β-globin gene contributed the 5' subhaplotypes of some atypical haplotypes.

Original languageEnglish
Pages (from-to)121-126
Number of pages6
JournalAmerican journal of hematology
Issue number2
StatePublished - Oct 1998


  • Beta globin gene
  • Fetal hemoglobin
  • Globin gene
  • Sickle hemoglobin


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