Synchronized Ca2+ signaling by intercellular propagation of Ca2+ action potentials in NRK fibroblasts.
Synchronized Ca2+ signaling by intercellular propagation of Ca2+ action potentials in NRK fibroblasts.
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NRK 成纤维细胞中 Ca2 动作电位的细胞间传播同步 Ca2 信号传导。
DOI:
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发表时间:
1997
期刊:
影响因子:
--
通讯作者:
A. Theuvenet
中科院分区:
文献类型:
--
作者:
A. D. D. De Roos;Peter H G M Willems;Everardus J.J. van Zoelen;A. Theuvenet
The intercellular propagation of Ca2+waves by diffusion of inositol trisphosphate has been shown to be a general mechanism by which nonexcitable cells communicate. Here, we show that monolayers of normal rat kidney (NRK) fibroblasts behave like a typical excitable tissue. In confluent monolayers of these cells, Ca2+ action potentials can be generated by local depolarization of the monolayer on treatment with either bradykinin or an elevation of the extracellular K+ concentration. These electrotonically propagating action potentials travel intercellularly over long distances in an all-or-none fashion at a speed of ∼6.1 mm/s and can be blocked by L-type Ca2+ channel blockers. The action potentials are generated by depolarizations beyond the threshold value for L-type Ca2+ channels of about -15 mV. The result of these locally induced, propagating Ca2+ action potentials is an almost synchronous, transient increase in the intracellular Ca2+ concentration in large numbers of cells. These data show that electrically coupled fibroblasts can form an excitable syncytium, and they elucidate a novel mechanism of intercellular Ca2+ signaling in these cells that may coordinate synchronized multicellular responses to local stimuli.
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影响因子:
56.9
作者:
HAROOTUNIAN, AT;KAO, JPY;TSIEN, RY
通讯作者:
TSIEN, RY
影响因子:
2.4
作者:
James V. Jester;W. Petroll;P. Barry;H. Cavanagh
通讯作者:
James V. Jester;W. Petroll;P. Barry;H. Cavanagh
DOI:
10.1172/jci113578
发表时间:
1988
期刊:
The Journal of clinical investigation
影响因子:
--
作者:
Salomon,D;Saurat,JH;Meda,P
通讯作者:
Meda,P
影响因子:
4
作者:
Harootunian,AT;Kao,JP;Paranjape,S;Adams,SR;Potter,BV;Tsien,RY
通讯作者:
Tsien,RY
DOI:
--
发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Baumgarten,LB;Toscas,K;Villereal,ML
通讯作者:
Villereal,ML