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:
--
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发表时间:
1995
影响因子:
4.8
通讯作者:
G. Carmignoto
中科院分区:
文献类型:
--
作者:
L. Pasti;T. Pozzan;G. Carmignoto
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.
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影响因子:
5
作者:
Palmer,E;Monaghan,DT;Cotman,CW
通讯作者:
Cotman,CW
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
影响因子:
56.9
作者:
CORNELLBELL, AH;FINKBEINER, SM;SMITH, SJ
通讯作者:
SMITH, SJ