Calcium signalling in adult endothelial outgrowth cells.

Calcium signalling in adult endothelial outgrowth cells.
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成体内皮生长细胞中的钙信号传导。

DOI:
10.1016/j.bbrc.2011.11.115
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发表时间:
2012
影响因子:
3.1
通讯作者:
J. Mackrill
J. Mackrill
中科院分区:
生物学4区
文献类型:
--
作者:
W. G. Pierce;Christopher Zanette;N. Caplice;J. Mackrill

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来源于血液单核细胞的内皮生长细胞(EOCs)可以分化为内皮样表型。对这些细胞的生物学理解存在缺陷,特别是对它们的Ca2+信号传导机制的详细表征。在本研究中,发现人EOCs在其内质网中表达两种形式的Ryanodine受体(RyR1和RyR2)Ca 2+释放通道。个体EOCs显示对生理相关调节剂纤维蛋白原和胶原的异质性Ca2+反应。一些EOCs表现出独特的,多相的Ca2+反应,纤维蛋白原组成的快速下降,短暂的增加,然后逐渐恢复到静息水平。Ca2+的瞬时升高需要L型电压门控钙通道和RyR。由纤维蛋白原刺激的Ca 2+的减少依赖于质膜Ca 2 + ATP酶泵,但不需要毒胡萝卜素敏感的Ca 2 + ATP酶。这些结果表明,EOCs具有复杂的Ca2+信号传导机制,能够产生不同的Ca2+波形响应不同的生理相关的线索。
Endothelial outgrowth cells (EOCs) derived from blood mononuclear cells can differentiate to an endothelial-like phenotype. There are deficits in understanding of the biology of these cells, particularly detailed characterisation of their Ca2+signalling mechanisms. In the current study, it was found that human EOCs express two forms of ryanodine receptor (RyR1 and RyR2) Ca2+release channel in their endoplasmic reticulum. Individual EOCs display heterogeneous Ca2+responses to physiologically relevant regulators fibrinogen and collagen. Some EOCs showed distinctive, multiphasic Ca2+responses to fibrinogen consisting of rapid decreases, transient increases then a gradual return to the resting levels. Transient elevations in Ca2+required both L-type voltage gated calcium channels and RyRs. Decreases in Ca2+stimulated by fibrinogen depended on plasma membrane Ca2+ATPase pumps, but did not require thapsigargin-sensitive Ca2+ATPases. These results indicate that EOCs possess sophisticated Ca2+signalling mechanisms, capable of generating distinct Ca2+waveforms in response to different physiologically relevant cues.
激动剂刺激单个培养肌肉细胞中细胞内游离钙的振荡和循环。
DOI: --
发表时间: 1988
期刊: The Journal of biological chemistry
影响因子: --
作者:
Ambler,SK;Poenie,M;Tsien,RY;Taylor,P
通讯作者: Taylor,P
DOI: 10.1172/jci8071
发表时间: 2000-01-01
影响因子: 15.9
作者:
Lin, Y;Weisdorf, D;Hebbel, RP
通讯作者: Hebbel, RP
DOI: 10.1074/jbc.270.50.30235
发表时间: 1994-04
影响因子: 4.8
作者:
M. A. Schwartz;K. Denninghoff
通讯作者: M. A. Schwartz;K. Denninghoff