Differential requirements for cell-specific elastase I enhancer domains in transfected cells and transgenic mice.

Differential requirements for cell-specific elastase I enhancer domains in transfected cells and transgenic mice.
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转染细胞和转基因小鼠对细胞特异性弹性蛋白酶 I 增强子结构域的不同需求。

DOI:
10.1101/gad.3.5.687
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发表时间:
1989
影响因子:
10.5
通讯作者:
Hammer,RE
Hammer,RE
中科院分区:
生物学1区
文献类型:
--
作者:
Swift,GH;Kruse,F;MacDonald,RJ;Hammer,RE

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胰腺弹性蛋白酶I基因的134-bp增强子区域足以指导转基因小鼠和培养中的转染细胞中的胰腺腺泡细胞特异性转录。在培养的转染胰腺细胞中,三个独立的增强子结构域中的十个碱基对扫描突变对增强子功能没有显着影响。因为三个结构域中的任何一对都足以指导小鼠中的胰腺特异性表达,所以胰腺特异性转录不需要一个结构域。在转基因小鼠中,任何两个结构域的破坏都会破坏增强子的功能。因此,在培养的转染细胞中对功能至关重要的弹性蛋白酶I增强子结构域在动物中不是必需的,但在转染细胞中具有不明显的冗余功能。这种冗余功能不是因为用于转染的特定腺泡细胞系、报告基因的性质或外源测试基因的整合状态。我们得出结论,胰腺腺泡细胞系中不存在动物胰腺细胞中存在的反式作用转录因子或因子修饰。
The 134-bp enhancer region of the pancreatic elastase I gene is sufficient to direct pancreatic acinar cell-specific transcription in transgenic mice and in transfected cells in culture. Ten-base-pair scanner mutations in three separate enhancer domains that inactivate enhancer function in transfected pancreatic cells in culture have no significant effect in transgenic mice. Because any pair of the three domains is sufficient to direct pancreas-specific expression in mice, no one domain is required for pancreas-specific transcription. Disruption of any two domains does inactivate the enhancer function in transgenic mice. Therefore, the elastase I enhancer domains essential for function in transfected cells in culture are not essential in animals but have a redundant function not apparent in transfected cells. This redundant function is not because of the particular acinar cell line used for transfections, the nature of the reporter gene, or the state of integration of the foreign test gene. We conclude that a trans-acting transcription factor or a modification of a factor(s) present in pancreatic cells of an animal is absent in pancreatic acinar cell lines.
DOI: --
发表时间: 1988
期刊: Cell
影响因子: 64.5
作者:
W. Hoeffler;R. Kovelman;R. Roeder
通讯作者: R. Roeder
DOI: --
发表时间: 1984-11
期刊: The Journal of biological chemistry
影响因子: --
作者:
G. Swift;C. Craik;S. Stary;C. Quinto;R. Lahaie;W. Rutter;Raymond J MacDonald
通讯作者: G. Swift;C. Craik;S. Stary;C. Quinto;R. Lahaie;W. Rutter;Raymond J MacDonald
DOI: 10.1038/333040a0
发表时间: 1988-05-05
期刊: NATURE
影响因子: 64.8
作者:
ONDEK, B;GLOSS, L;HERR, W
通讯作者: HERR, W
DOI: 10.1101/gad.2.4.453
发表时间: 1988-04-01
影响因子: 10.5
作者:
BEHRINGER, RR;MATHEWS, LS;BRINSTER, RL
通讯作者: BRINSTER, RL
大鼠外分泌胰腺中的细胞特异性增强剂。
DOI: 10.1073/pnas.83.11.3599
发表时间: 1986
影响因子: 11.1
作者:
Boulet,AM;Erwin,CR;Rutter,WJ
通讯作者: Rutter,WJ