The 5'-flanking sequences of the human growth hormone gene contain a cell-specific control element.

The 5'-flanking sequences of the human growth hormone gene contain a cell-specific control element.
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人类生长激素基因的 5 侧翼序列包含细胞特异性控制元件。

DOI:
10.1089/dna.1.1986.5.503
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发表时间:
1986
期刊:
DNA (Mary Ann Liebert, Inc.)
影响因子:
--
通讯作者:
Eberhardt,NL
Eberhardt,NL
中科院分区:
--
文献类型:
--
作者:
Cattini,PA;Peritz,LN;Anderson,TR;Baxter,JD;Eberhardt,NL

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人生长激素(hGH)基因的5′侧翼序列含有细胞特异性控制元件。使用大鼠垂体前叶(GC)和非垂体细胞系(HeLa、Rat 2和KB)的瞬时转染,检查了含有hGH基因与氯霉素乙酰转移酶(cat)基因融合的截短5′-侧翼DNA片段的杂交基因;仅在GC细胞中观察到这些基因杂交体的优先表达。通过对hGH基因5′端侧翼序列的缺失分析,发现该基因-230 ~-180位核苷酸的区域是GC细胞中cat基因有效表达所必需的。该DNA区域与含有组织特异性控制元件的rGH基因区域高度同源。将单纯疱疹病毒胸苷激酶基因(TKp)启动子上游的hGH基因与CAT基因连接,在GC细胞中含有组织特异性控制元件,但缺少其近端启动子元件的杂合基因比TKp. CAT基因产生更高的CAT活性,但在HeLa细胞中则没有。这些数据表明,位于hGH基因5′-区的组织特异性控制元件可以在异源启动子存在下起作用,并且对垂体细胞中的表达具有特异性。
The 5′-flanking sequences of the human growth hormone (hGH) gene contain a cell-specific control element. Hybrid genes containing truncated 5′-flanking DNA fragments from the hGH gene fused to the chloramphenicol acetyl transferase (cat) gene were examined using transient transfection of rat anterior pituitary (GC) and nonpituitary cell lines (HeLa, Rat 2, and KB); preferential expression of these gene hybrids was only observed in GC cells. Deletions through the 5′-flanking sequences of the hGH gene revealed that the region containing nucleotides -230 to -180 is required for efficientcatgene expression in GC cells. This region of DNA is highly homologous to a region of the rGH gene that contains a tissue-specific control element. A hybrid gene containing the tissue-specific control element, but lacking the proximal promoter elements, of the hGH gene upstream from the promoter of the thymidine kinase gene (TKp) from herpes simplex virus ligated to thecatgene produced more CAT activity than the TKp.catgene in GC cells but not in HeLa cells. These data suggest that the tissue-specific control element located in the 5′-region of the hGH gene can act in the presence of a heterologous promoter and is specific for expression in pituitary cells.
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发表时间: 1985-01-01
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DOI: --
发表时间: 1986
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DOI: --
发表时间: 1985
期刊: The Journal of biological chemistry
影响因子: --
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发表时间: 1985-01-01
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DOI: 10.1089/dna.1.1982.1.145
发表时间: 1982
期刊: DNA (Mary Ann Liebert, Inc.)
影响因子: --
作者:
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