Regulation of ethanol-sensitive EAAT2 expression through adenosine A1 receptor in astrocytes.

Regulation of ethanol-sensitive EAAT2 expression through adenosine A1 receptor in astrocytes.
复制标题

DOI:
10.1016/j.bbrc.2011.01.104
复制
发表时间:
2011-03-04
影响因子:
3.1
通讯作者:
Choi DS
Choi DS
中科院分区:
生物学4区
文献类型:
--
作者:
Wu J;Lee MR;Kim T;Johng S;Rohrback S;Kang N;Choi DS

文献摘要

参考文献

被引文献

相似文献

星形胶质细胞中腺苷调节的谷氨酸信号与许多神经和神经精神疾病有关。在这项研究中,我们研究了腺苷A1受体是否调节EAAT 2在星形胶质细胞的表达,使用药理学药物和siRNA。我们发现腺苷A1受体特异性拮抗剂DPCPX或PSB 36以剂量依赖的方式降低EAAT 2的表达。因此,A1受体的敲低降低了星形胶质细胞中EAAT 2 mRNA的表达,而A1受体的过表达上调了EAAT 2的表达和功能。由于A1受体的激活主要是耦合到抑制性G-蛋白和抑制腺苷酸环化酶的活性,我们研究了毛喉素,激活腺苷酸环化酶的活性,EAAT 2 mRNA水平的影响。有趣的是,我们发现毛喉素以剂量和时间依赖性方式降低EAAT 2表达。相反,腺苷酸环化酶抑制剂SQ 22536以剂量和时间依赖性方式增加EAAT 2表达。此外,毛喉素阻断乙醇诱导的EAAT 2上调。综上所述,这些结果表明,A1受体介导的信号调节EAAT 2在星形胶质细胞中的表达。
Adenosine-regulated glutamate signaling in astrocytes is implicated in many neurological and neuropsychiatric disorders. In this study, we examined whether adenosine A1 receptor regulates EAAT2 expression in astrocytes using pharmacological agents and siRNAs. We found that adenosine A1 receptor-specific antagonist DPCPX or PSB36 decreased EAAT2 expression in a dose-dependent manner. Consistently, knockdown of A1 receptor in astrocytes decreased EAAT2 mRNA expression while overexpression of A1 receptor upregulated EAAT2 expression and function. Since A1 receptor activation is mainly coupled to inhibitory G-proteins and inhibits the activity of adenylate cyclase, we investigated the effect of forskolin, which activates adenylate cyclase activity, on EAAT2 mRNA levels. Interestingly, we found that forskolin reduced EAAT2 expression in dose- and time-dependent manners. In contrast, adenylate cyclase inhibitor SQ22536 increased EAAT2 expression in dose- and time-dependent manners. In addition, forskolin blocked ethanol-induced EAAT2 upregulation. Taken together, these results suggest that A1 receptor-mediated signaling regulates EAAT2 expression in astrocytes.
DOI: 10.1074/jbc.m707697200
发表时间: 2008-05-09
影响因子: 4.8
作者:
Lee, Seok-Geun;Su, Zhao-Zhong;Fisher, Paul B.
通讯作者: Fisher, Paul B.
DOI: 10.1016/0006-8993(84)90377-9
发表时间: 1984-01-01
期刊: BRAIN RESEARCH
影响因子: 2.9
作者:
ALLIOT, F;PESSAC, B
通讯作者: PESSAC, B
DOI: 10.1126/science.7916485
发表时间: 1994-09-30
期刊: SCIENCE
影响因子: 56.9
作者:
MANZONI, OJ;MANABE, T;NICOLL, RA
通讯作者: NICOLL, RA
DOI: 10.1006/geno.1994.1609
发表时间: 1994-11-15
期刊: GENOMICS
影响因子: 4.4
作者:
KIRSCHNER, MA;COPELAND, NG;AMARA, SG
通讯作者: AMARA, SG
DOI: 10.1523/jneurosci.1746-09.2009
发表时间: 2009-07-22
期刊: The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子: --
作者:
Sari Y;Smith KD;Ali PK;Rebec GV
通讯作者: Rebec GV