当前位置： SCI文献检索 > ANNALS OF HEMATOLOGY期刊下所有文献 > The Hellenic type of nondeletional hereditary persistence of fetal hemoglobin results from a novel mutation (g.-109G>T) in the HBG2 gene promoter.

The Hellenic type of nondeletional hereditary persistence of fetal hemoglobin results from a novel mutation (g.-109G>T) in the HBG2 gene promoter.

Abstract：

:Nondeletional hereditary persistence of fetal hemoglobin (nd-HPFH), a rare hereditary condition resulting in elevated levels of fetal hemoglobin (Hb F) in adults, is associated with promoter mutations in the human fetal globin (HBG1 and HBG2) genes. In this paper, we report a novel type of nd-HPFH due to a HBG2 gene promoter mutation (HBG2:g.-109G>T). This mutation, located at the 3' end of the HBG2 distal CCAAT box, was initially identified in an adult female subject of Central Greek origin and results in elevated Hb F levels (4.1%) and significantly increased Ggamma-globin chain production (79.2%). Family studies and DNA analysis revealed that the HBG2:g.-109G>T mutation is also found in the family members in compound heterozygosity with the HBG2:g.-158C>T single nucleotide polymorphism or the silent HBB:g.-101C>T beta-thalassemia mutation, resulting in the latter case in significantly elevated Hb F levels (14.3%). Electrophoretic mobility shift analysis revealed that the HBG2:g.-109G>T mutation abolishes a transcription factor binding site, consistent with previous observations using DNA footprinting analysis, suggesting that guanine at position HBG2/1:g.-109 is critical for NF-E3 binding. These data suggest that the HBG2:g-109G>T mutation has a functional role in increasing HBG2 transcription and is responsible for the HPFH phenotype observed in our index cases.

journal_name

Ann Hematol

journal_title

Annals of hematology

authors

Chassanidis C,Kalamaras A,Phylactides M,Pourfarzad F,Likousi S,Maroulis V,Papadakis MN,Vamvakopoulos NK,Aleporou-Marinou V,Patrinos GP,Kollia P

doi

10.1007/s00277-008-0643-0

subject

Has Abstract

pub_date

2009-06-01 00:00:00

pages

549-55

issue

6

eissn

0939-5555

issn

1432-0584

journal_volume

88

pub_type

杂志文章

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