Long-lasting Changes of Calcium Oscillations in Astrocytes

Long-lasting Changes of Calcium Oscillations in Astrocytes
复制标题

星形胶质细胞钙振荡的长期变化

DOI:
--
复制
发表时间:
1995
影响因子:
4.8
通讯作者:
G. Carmignoto
G. Carmignoto
中科院分区:
生物学2区
文献类型:
--
作者:
L. Pasti;T. Pozzan;G. Carmignoto

文献摘要

参考文献

被引文献

相似文献

中枢神经系统突触强度的长期变化是由兴奋性神经递质受体激活后胞浆钙浓度([Ca 2 +]i)的增加介导的。这些现象代表了真核生物学习和记忆过程的可能细胞基础,据信仅限于神经元。在这里,我们提供的证据引起的兴奋性神经递质谷氨酸在中枢神经系统的非神经元细胞群,即视觉皮层星形胶质细胞培养的反应的长期变化。谷氨酸刺激诱导星形胶质细胞中的[Ca2+]i振荡的规则模式。第二次刺激,在2至60分钟的间隔后,诱导以频率增加为特征的振荡反应。星形胶质细胞反应的这种变化的诱导被一氧化氮合酶的特异性抑制剂消除,并在外源性一氧化氮产生或添加渗透性环鸟苷酸类似物后恢复。局部短暂的谷氨酸脉冲个别星形胶质细胞,在1赫兹的速率,也引起[Ca2+]振荡,其频率增加后的第二系列的脉冲。谷氨酸在星形胶质细胞中诱导的[Ca2+]i振荡反应的持久修饰表明,在中枢神经系统中,细胞记忆不是神经元的独特特征。
Long-term changes of synaptic strength in the central nervous system are mediated by an increase of cytosolic calcium concentration ([Ca2+]i) following activation of excitatory neurotransmitter receptors. These phenomena, which represent a possible cellular basis for learning and memory processes in eukaryotes, are believed to be restricted to neurons. Here we provide evidence for a long-term change of the response elicited by the excitatory neurotransmitter glutamate in a non-neuronal cell population of the central nervous system, i.e. visual cortical astrocytes in culture. Stimulation with glutamate induces in astrocytes a regular pattern of [Ca2+]i oscillations. A second stimulation, after an interval ranging from 2 to 60 min, induces an oscillatory response characterized by an increased frequency. Induction of this change in the astrocyte response is abolished by a specific inhibitor of the nitric oxide synthase and recovers upon exogenous nitric oxide generation or addition of a permeant cGMP analogue. Local brief pulses of glutamate to individual astrocytes, at a rate of 1 Hz, also elicit [Ca2+]ioscillations whose frequency increases following a second series of pulses. The long-lasting modification in the [Ca2+]i oscillatory response induced by glutamate in astrocytes demonstrates that in the central nervous system cellular memory is not a unique feature of neurons.
Trans-ACPD,磷酸肌醇偶联兴奋性氨基酸受体的选择性激动剂。
DOI: 10.1016/0014-2999(89)90383-x
发表时间: 1989
影响因子: 5
作者:
Palmer,E;Monaghan,DT;Cotman,CW
通讯作者: Cotman,CW
氨甲酰胆碱刺激的胰岛素瘤细胞中游离 Ca2 振荡的细胞特异性模式。
DOI: --
发表时间: 1988
期刊: The Journal of biological chemistry
影响因子: --
作者:
Prentki,M;Glennon,MC;Thomas,AP;Morris,RL;Matschinsky,FM;Corkey,BE
通讯作者: Corkey,BE
DOI: 10.1073/pnas.87.2.682
发表时间: 1990-01-01
影响因子: 11.1
作者:
BREDT, DS;SNYDER, SH
通讯作者: SNYDER, SH
DOI: 10.1073/pnas.87.9.3454
发表时间: 1990-05-01
影响因子: 11.1
作者:
GLAUM, SR;HOLZWARTH, JA;MILLER, RJ
通讯作者: MILLER, RJ
DOI: 10.1126/science.1967852
发表时间: 1990-01-26
期刊: SCIENCE
影响因子: 56.9
作者:
CORNELLBELL, AH;FINKBEINER, SM;SMITH, SJ
通讯作者: SMITH, SJ