Iron protoporphyrin IX (Hemin) but not tin or zinc protoporphyrin IX can stimulate gene expression in K562 cells from enhancer elements containing binding sites for NF-E2

Iron protoporphyrin IX (Hemin) but not tin or zinc protoporphyrin IX can stimulate gene expression in K562 cells from enhancer elements containing binding sites for NF-E2
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铁原卟啉 IX(血红素)而非锡或锌原卟啉 IX 可以通过含有 NF-E2 结合位点的增强子元件刺激 K562 细胞中的基因表达

DOI:
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发表时间:
1994
期刊:
影响因子:
--
通讯作者:
W. Solomon
W. Solomon
中科院分区:
--
文献类型:
--
作者:
J. Palma;Xiaoying Gao;Cheng;Shulan Wu;W. Solomon

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Many genes whose transcription is erythroid-specific contain enhancer or promoter elements that bind the transcription factor NF-E2. Hemin induction increases the expression of globin genes in the human erythroleukemia cell line K562, and increases the expression of reporters gene regulated by an enhancer elements containing binding sites for NF-E2. The failure of metalloporphyrins other than hemin to stimulate the transient expression of a CAT reporter gene linked to an enhancer element containing a binding site for NF-E2 was correlated with their failure to induce benzidine-positive K562 cells and increase the steady-state level of gamma-globin mRNA. This study suggests that elevated levels of zinc protoporphyrin IX found in the anemia of chronic disease, iron deficiency, and lead poisoning may contribute to a decrease in globin gene expression by interfering with the transcriptional activity of enhancer elements containing binding sites for NF-E2.
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