Rapid inhibitory effects of corticosterone on calcium influx in rat dorsal root ganglion neurons

Rapid inhibitory effects of corticosterone on calcium influx in rat dorsal root ganglion neurons
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皮质酮对大鼠背根神经节神经元钙内流的快速抑制作用

DOI:
10.1016/s0306-4522(02)00568-7
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发表时间:
2003-01
期刊:
影响因子:
3.3
通讯作者:
He LM, Zhang CG, Zhou Z, Xu T,
He LM, Zhang CG, Zhou Z, Xu T,
中科院分区:
医学3区
文献类型:
--
作者:
He LM, Zhang CG, Zhou Z, Xu T,

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皮质酮除了对基因表达有明显的影响外,还可能在非基因组学上影响细胞功能。本研究旨在通过膜片钳技术和单细胞钙荧光技术研究皮质酮对背根神经节神经元兴奋性的快速非基因组效应。结果表明,皮质酮对背根神经节神经元电压依赖性钙电流具有剂量依赖性的快速抑制作用。此外,皮质酮抑制[Ca 2 +] i升高由50 mM高K+在短短3 s内。皮质酮对电压依赖性钙电流和高钾诱导的钙内流的抑制作用在加入蛋白激酶C抑制剂或百日咳毒素预处理24 h后减弱。我们的研究结果表明,皮质酮对背根神经节神经元的兴奋性的非基因组效应,这种效应是通过一个假定的百日咳毒素敏感的G蛋白偶联受体和蛋白激酶C的激活介导的。
Corticosterone may nongenomically affect cell functions in addition to its well-characterized effects on gene expression. The purpose of this study is to examine if corticosterone has a rapid nongenomic effect on excitability of dorsal root ganglion neurons by using patch-clamp and single-cell Ca2+microfluometry techniques. The results show that corticosterone has a dose-dependent rapid inhibitory effect on the voltage-dependent calcium currents in dorsal root ganglion neurons. Moreover, corticosterone inhibits [Ca2+]ielevation induced by 50 mM high K+within just 3 s. The inhibitory effects of corticosterone on the voltage-dependent calcium current and high K+-induced calcium influx diminish after adding protein kinase C inhibitor or pretreatment with pertussis toxin for 24 h. Our results demonstrate an nongenomic effect of corticosterone on the excitability of dorsal root ganglion neurons and the effect is mediated through a putative pertussis toxin-sensitive G-protein-coupled receptor and activation of protein kinase C.
DOI: 10.1023/a:1026499604848
发表时间: 2000-10-01
影响因子: 3.7
作者:
Hinz, B;Hirschelmann, R
通讯作者: Hirschelmann, R
DOI: 10.1016/0304-3959(84)90013-7
发表时间: 1984-11
期刊: Pain
影响因子: 7.4
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DOI: --
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期刊: Sheng li xue bao : [Acta physiologica Sinica]
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DOI: 10.1210/endo.139.12.6376
发表时间: 1998-12
期刊: Endocrinology
影响因子: 4.8
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J. Qiu;L. Lou;Xiu-ying Huang;S. Lou;G. Pei;Yi-Zhang Chen
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DOI: 10.1016/0006-8993(91)91347-4
发表时间: 1991-11
期刊: Brain Research
影响因子: 2.9
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