Substitution of the Human β-Spectrin Promoter for the Human Aγ-Globin Promoter Prevents Silencing of a Linked Human β-Globin Gene in Transgenic Mice

Substitution of the Human β-Spectrin Promoter for the Human Aγ-Globin Promoter Prevents Silencing of a Linked Human β-Globin Gene in Transgenic Mice
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用人 β-血影蛋白启动子替代人 Aγ-珠蛋白启动子可防止转基因小鼠中相关人 β-珠蛋白基因的沉默

DOI:
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发表时间:
1998
影响因子:
5.3
通讯作者:
D. Bodine
D. Bodine
中科院分区:
生物学2区
文献类型:
--
作者:
D. Sabatino;A. P. Cline;P. Gallagher;L. Garrett;G. Stamatoyannopoulos;B. Forget;D. Bodine

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摘要 在发育过程中,红细胞生成位点和每个发育阶段表达的珠蛋白基因都会发生变化。先前的工作表明,转基因小鼠中人类β样珠蛋白基因的高水平表达需要基因座控制区(LCR)的存在。血红蛋白转换模型提出,LCR 和/或阶段特异性元件与珠蛋白基因序列相互作用,以激活红细胞中的特定基因。为了测试这些模型,我们培育了含有人 Aγ-珠蛋白基因的转基因小鼠,该基因与含有人 β-血影蛋白启动子的 576 bp 片段连接。在这些小鼠中,β-血影蛋白 Aγ-球蛋白 (βsp/Aγ) 转基因在整个发育过程中在红细胞中高水平表达。含有带有 micro-LCR、βsp/Aγ-、ψβ-、δ- 和 β-珠蛋白基因的 40-kb 粘粒构建体的转基因小鼠没有表现出发育转换,并在整个发育过程中在红细胞中表达人 γ- 和 β- 珠蛋白 mRNA。含有带有Aγ-珠蛋白基因启动子的对照粘粒的小鼠表现出发育转换,并在卵黄囊和胎儿肝红系细胞中表达Aγ-珠蛋白mRNA,在胎儿肝和成人红系细胞中表达β-珠蛋白mRNA。我们的结果表明,用β-血影蛋白启动子替换γ-珠蛋白启动子可以使β-珠蛋白基因表达。我们得出结论,γ-珠蛋白启动子对于抑制卵黄囊红系细胞中β-珠蛋白基因的表达是必要且充分的。
ABSTRACT During development, changes occur in both the sites of erythropoiesis and the globin genes expressed at each developmental stage. Previous work has shown that high-level expression of human β-like globin genes in transgenic mice requires the presence of the locus control region (LCR). Models of hemoglobin switching propose that the LCR and/or stage-specific elements interact with globin gene sequences to activate specific genes in erythroid cells. To test these models, we generated transgenic mice which contain the human Aγ-globin gene linked to a 576-bp fragment containing the human β-spectrin promoter. In these mice, the β-spectrin Aγ-globin (βsp/Aγ) transgene was expressed at high levels in erythroid cells throughout development. Transgenic mice containing a 40-kb cosmid construct with the micro-LCR, βsp/Aγ-, ψβ-, δ-, and β-globin genes showed no developmental switching and expressed both human γ- and β-globin mRNAs in erythroid cells throughout development. Mice containing control cosmids with the Aγ-globin gene promoter showed developmental switching and expressed Aγ-globin mRNA in yolk sac and fetal liver erythroid cells and β-globin mRNA in fetal liver and adult erythroid cells. Our results suggest that replacement of the γ-globin promoter with the β-spectrin promoter allows the expression of the β-globin gene. We conclude that the γ-globin promoter is necessary and sufficient to suppress the expression of the β-globin gene in yolk sac erythroid cells.
胎儿血红蛋白浓度可预测镰状细胞性贫血儿童的疾病严重程度。
DOI: --
发表时间: 1987
期刊: Progress in clinical and biological research
影响因子: --
作者:
Rucknagel,DL;Sarniak,SA;Whitten,CF;Odenheimer,DA
通讯作者: Odenheimer,DA
DOI: 10.1101/gad.9.18.2203
发表时间: 1995-09-15
影响因子: 10.5
作者:
FIERING, S;EPNER, E;GROUDINE, M
通讯作者: GROUDINE, M
DOI: 10.1073/pnas.92.12.5655
发表时间: 1995-06
影响因子: 11.1
作者:
K. Peterson;Qi Liang Li;C. Clegg;T. Furukawa;P. Navas;E. J. Norton;T. Kimbrough;G. Stamatoyannopoulos
通讯作者: K. Peterson;Qi Liang Li;C. Clegg;T. Furukawa;P. Navas;E. J. Norton;T. Kimbrough;G. Stamatoyannopoulos
单个红细胞特异性 DNase I 超敏感位点可激活转基因小鼠中高水平的人类 β-珠蛋白基因表达。
DOI: 10.1101/gad.3.3.314
发表时间: 1989
影响因子: 10.5
作者:
Ryan,TM;Behringer,RR;Martin,NC;Townes,TM;Palmiter,RD;Brinster,RL
通讯作者: Brinster,RL
转基因小鼠中人胚胎珠蛋白基因转换的自主发育控制。
DOI: 10.1126/science.2251502
发表时间: 1990
期刊: Science (New York, N.Y.)
影响因子: --
作者:
Raich,N;Enver,T;Nakamoto,B;Josephson,B;Papayannopoulou,T;Stamatoyannopoulos,G
通讯作者: Stamatoyannopoulos,G