Human gamma- to beta-globin gene switching using a mini construct in transgenic mice.

Human gamma- to beta-globin gene switching using a mini construct in transgenic mice.
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在转基因小鼠中使用微型构建体将人类 γ 球蛋白基因转换为 β 球蛋白。

DOI:
10.1128/mcb.12.4.1561-1567.1992
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发表时间:
1992
影响因子:
5.3
通讯作者:
Lingrel,JB
Lingrel,JB
中科院分区:
生物学2区
文献类型:
--
作者:
Lloyd,JA;Krakowsky,JM;Crable,SC;Lingrel,JB

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人类珠蛋白基因的发育调控涉及从胎儿 (γ-) 珠蛋白基因表达到成人 (β-) 珠蛋白基因表达的关键转换。通过在转基因小鼠中表达人珠蛋白基因,可以研究这种开关的机制。先前的工作表明,转基因小鼠中人珠蛋白基因的高水平表达需要β-珠蛋白基因座中基因上游存在基因座控制区(LCR)。转基因小鼠中β-珠蛋白基因表达的高水平、正确的发育调控以前仅在包含LCR和来自该基因座的多个基因的30至40kb基因组构建体中实现。这表明,在胚胎生命中,需要其他珠蛋白基因对LCR序列的竞争或来自β-珠蛋白基因座的基因间序列的存在来沉默β-珠蛋白基因。这里提出的结果清楚地表明,仅存在 γ-珠蛋白基因 (3.3 kb) 就足以下调用 LCR-γ-β-珠蛋白微型构建体制成的胚胎转基因小鼠中的 β-珠蛋白基因。结果还表明,在由不包含β-珠蛋白基因的LCR-γ-珠蛋白构建体制成的大多数转基因系的成年小鼠中,γ-珠蛋白基因被下调,即,γ-珠蛋白基因可以自主调节。这里提供的证据表明,γ-珠蛋白基因的 3' 区域可能对于成人的下调很重要。所描述的5'H2γenβ构建体是用于进一步研究转基因小鼠中人γ-至β-珠蛋白基因转换的机制的合适模型。
The developmental regulation of the human globin genes involves a key switch from fetal (γ-) to adult (β-) globin gene expression. It is possible to study the mechanism of this switch by expressing the human globin genes in transgenic mice. Previous work has shown that high-level expression of the human globin genes in transgenic mice requires the presence of the locus control region (LCR) upstream of the genes in the β-globin locus. High-level, correct developmental regulation of β-globin gene expression in transgenic mice has previously been accomplished only in 30- to 40-kb genomic constructs containing the LCR and multiple genes from the locus. This suggests that either competition for LCR sequences by other globin genes or the presence of intergenic sequences from the β-globin locus is required to silence the β-globin gene in embryonic life. The results presented here clearly show that the presence of the γ-globin gene (3.3 kb) alone is sufficient to down-regulate the β-globin gene in embryonic transgenic mice made with an LCR-γ-β-globin mini construct. The results also show that the γ-globin gene is down-regulated in adult mice from most transgenic lines made with LCR-γ-globin constructs not including the β-globin gene, i.e., that the γ-globin gene can be autonomously regulated. Evidence presented here suggests that a region 3′ of the γ-globin gene may be important for down-regulation in the adult. The 5′ΉS2γeηβ construct described is a suitable model for further study of the mechanism of human γ- to β-globin gene switching in transgenic mice.
DOI: 10.1016/0092-8674(86)90862-7
发表时间: 1986-07-04
期刊: CELL
影响因子: 64.5
作者:
KOLLIAS, G;WRIGHTON, N;GROSVELD, F
通讯作者: GROSVELD, F
人类β-珠蛋白基因含有下游发育特异性增强子
DOI: --
发表时间: 1987
期刊:
影响因子: --
作者:
G. Kollias;J. Hurst;E. Deboer;F. Grosveld
通讯作者: F. Grosveld
转基因小鼠中人类 7-珠蛋白基因转换
DOI: --
发表时间: 2007
期刊:
影响因子: --
作者:
R. Behringer;T. M. Ryan;R. Palmiter;R. Brinster;T. Townes
通讯作者: T. Townes
DOI: 10.1038/344309a0
发表时间: 1990-03-22
期刊: NATURE
影响因子: 64.8
作者:
ENVER, T;RAICH, N;STAMATOYANNOPOULOS, G
通讯作者: STAMATOYANNOPOULOS, G
DOI: 10.1073/pnas.82.19.6384
发表时间: 1985-01-01
影响因子: 11.1
作者:
TUAN, D;SOLOMON, W;LONDON, IM
通讯作者: LONDON, IM