Reciprocal regulation of estrogen and NGF receptors by their ligands in PC12 cells.

Reciprocal regulation of estrogen and NGF receptors by their ligands in PC12 cells.
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PC12 细胞中雌激素和 NGF 受体的配体相互调节。

DOI:
10.1002/neu.480250807
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发表时间:
1994
期刊:
Journal of neurobiology
影响因子:
--
通讯作者:
Toran-Allerand,CD
Toran-Allerand,CD
中科院分区:
--
文献类型:
--
作者:
Sohrabji,F;Greene,LA;Miranda,RC;Toran-Allerand,CD

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最近的研究表明,雌激素受体mRNA和蛋白质与神经营养因子受体系统在发育中的基底前脑中共定位。在本研究中,我们研究了雌激素和神经营养因子受体系统的相互调节的潜力,其配体在一个原型的神经营养因子的目标,PC 12细胞。采用原位杂交组织化学、RT-PCR和改良的核交换试验,我们发现在PC 12细胞中存在雌激素受体mRNA和雌激素结合。此外,虽然在幼稚PC 12细胞中雌激素结合相对较低,但长期暴露于NGF使这些细胞中的雌激素结合增强了六倍。此外,同时暴露于雌激素和NGF受体mRNA差异调节两种NGF受体mRNA的表达。trkAmRNA表达上调,而p75 NGFR mRNA瞬时下调。目前的数据表明,神经生长因子可能增加神经元对雌激素的敏感性,雌激素,通过差异调节p75 NGFRandtrkAmRNA,可能改变两个神经生长因子受体的比例,并相应地,神经营养因子的反应性。鉴于雌激素和神经营养因子受体系统在发育中的CNS中广泛共定位,NGF和雌激素对这些受体系统的相互调节可能对控制神经成熟和维持神经功能的过程具有重要意义。John Wiley & Sons,Inc.
Recent work has shown that estrogen receptor mRNA and protein co‐localize with neurotrophin receptor systems in the developing basal forebrain. In the present study we examined the potential for reciprocal regulation of estrogen and neurotrophin receptor systems by their ligands in a prototypical neurotrophin target, the PC12 cell. usingin situhybridization histochemistry, RT‐PCR and a modified nuclear exchange assay, we found both estrogen receptor mRNA and estrogen binding in PC12 cells. Moreover, while estrogen binding was relatively low in naive PC12 cells, long‐term exposure to NGF enhanced estrogen binding in these cells by sixfold. Furthermore, concurrent exposure to estrogen and NGF receptor mRNAs deifferentially regulated the expression of the two NGF receptor mRNAs. The expression oftrkAmRNA was up‐regulated, while p75NGFRmRNA was down‐regulated transiently. The present data indicate that NGF may increase neuronal sensitivity to estrogen, and that estrogen, by differentially regulating p75NGFRandtrkAmRNA, may alter the ratio fo the two NGF receptors, and, conseuqnetly, neurotrophin responsivity. In view of the widespread co‐localization of estrogen and neurotrophin receptor systems in the developing CNS, the reciprocal regulation of these receptor systems by NGF and estrogen may have important implications for processes governing neural maturation and the maintenance of neural funciton. 1994 John Wiley & Sons, Inc.
视黄酸调节神经生长因子受体的表达和对神经生长因子的敏感性。
DOI: --
发表时间: 1992
期刊: The Journal of biological chemistry
影响因子: --
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影响因子: --
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