Purkinje cell protein-2 regulatory regions and transgene expression in cerebellar compartments.

Purkinje cell protein-2 regulatory regions and transgene expression in cerebellar compartments.
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小脑室中浦肯野细胞蛋白 2 调节区和转基因表达。

DOI:
10.1101/gad.5.7.1136
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发表时间:
1991
影响因子:
10.5
通讯作者:
Orr,HT
Orr,HT
中科院分区:
生物学1区
文献类型:
--
作者:
Vandaele,S;Nordquist,DT;Feddersen,RM;Tretjakoff,I;Peterson,AC;Orr,HT

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浦肯野细胞蛋白2(Pcp-2)在小脑浦肯野细胞和视网膜双极神经元中表达。为了阐明Pcp-2的表达如何仅限于两种神经元类型,并推导出在这些神经元亚群中表达异源基因的工具,已克隆小鼠Pcp-2基因的基因组序列,并将侧翼序列作为神经元特异性调控元件的来源进行了评价。鉴定了与在神经元中表达的其它基因具有同源性的上游区域,并且通过将0.4kb的上游和0.3kb的下游Pcp-2侧翼DNA连接到lacZ来构建含有该序列的杂交基因。携带该构建体的转基因小鼠在广泛的神经元类型中表现出β-半乳糖苷酶,这表明该序列可能在指定神经元表达中发挥重要作用。另外的3.1 kb的Pcp-2上游序列限制了β-半乳糖苷酶的表达,以少数神经元类型,最显着的是浦肯野细胞内parasagitally定向小脑隔间。因此建议存在位于3.1-kb上游区域内的元件,并用于特异性限制Pcp-2表达。此外,由于β-半乳糖苷酶在这些转基因小鼠的双极细胞中不表达,因此内源性Pcp-2基因的视网膜表达必须涉及除了那些赋予浦肯野细胞内表达的元件之外的元件。
The Purkinje cell protein 2 (Pcp-2) is expressed in cerebellar Purkinje cells and retinal bipolar neurons. To illuminate how Pcp-2 expression is restricted to only two neuronal types and to derive tools to express heterologous genes in these neuronal subpopulations, genomic sequences of the mouse Pcp-2 gene have been cloned and flanking sequences have been evaluated as a source of neuron-specific regulatory elements. An upstream region with homology to other genes expressed in neurons was identified and a hybrid gene containing this sequence was constructed by ligating 0.4 kb of upstream and 0.3 kb of downstream Pcp-2-flanking DNA to lacZ. Transgenic mice bearing this construct exhibited beta-galactosidase in a wide array of neuron types, suggesting that this sequence may play an important role in specifying neuronal expression. Addition of a further 3.1 kb of Pcp-2 upstream sequences restricted expression of beta-galactosidase to a small number of neuron types and most notably to Purkinje cells within parasagitally oriented cerebellar compartments. The presence of elements lying within the 3.1-kb upstream region and acting to specifically restrict Pcp-2 expression is therefore suggested. Moreover, as beta-galactosidase was not expressed in the bipolar cells of these transgenic mice, retinal expression of the endogenous Pcp-2 gene must involve elements in addition to those conferring expression within Purkinje cells.
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DOI: --
发表时间: 1985
影响因子: 2.7
作者:
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DOI: --
发表时间: 1989
期刊: The Journal of biological chemistry
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