Retroviral Transfer of a Human Fetal Globin Gene Carrying the -202Gγβ+-HPFH Mutation into the Human Erythroleukemia Line, KMOE
作者:
StoeckertC. J.,
期刊:
Hemoglobin
(Taylor Available online 1991)
卷期:
Volume 15,
issue 4
页码: 257-268
ISSN:0363-0269
年代: 1991
DOI:10.3109/03630269109027878
出版商: Taylor&Francis
数据来源: Taylor
摘要:
The presence of point mutations at position -202 relative to the mRNA Cap site of both human fetalγ-globin genes is linked with elevated fetal globin levels in adults. The question addressed in this study is whether the -202 mutation affectsγ-globin gene expression in the same manner as the -117 hereditary persistence of fetal. hemoglobin (HPFH)Aγ-globin mutation. The -117 mutation was found to cause over-expression and confer inducibility of a retro-virally transferredγ-globin gene in cytosine arabinoside (araC)-treated KMOE cells in an earlier study. In this study, fetal globin genes driven by either the normalGγor -202 HPFHGγ-globin promoter were retrovirally transferred into human erythroid HOE cells. The -202 HPFH mutation did not cause over-expression or confer inducibility of the transferredγ-globin gene in araC-treated KMOE cells. Thus, the -202 HPFH mutation affectsγ-globin gene expression by a different mechanism than the -117 HPFH mutation. Furthermore, this study provides evidence against a general increasing ofγ-globin gene expression as might be expected from the -202 mutation altering binding of a ubiquitous factor such as Spl.
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