Fluid Flow Modulates Calcium Entry and Activates Membrane Currents in Cultured Human Aortic Endothelial Cells

Fluid Flow Modulates Calcium Entry and Activates Membrane Currents in Cultured Human Aortic... Human aortic endothelial cells (HAEC) respond to flow with Ca2+ entry, activation of a nonselective cation channel, activation of a chloride channel, and activation of a calcium-activated potassium channel. Conversely, human capillary endothelial cells were unaffected by similar flow rates. In HAEC the flow induced cytosolic free calcium increase ([Ca2+] i ) and the ionic currents associated with it were sustained for up to 15 min after perfusion was stopped. In the absence of extracellular Ca2+, fluid flow was unable to evoke the [Ca2+] i increase or the increase in membrane currents but the response could be restored by addition of extracellular Ca2+. Surprisingly, the flow response was inhibited in 50% of the cells by inhibitors of nitric oxide production. The results suggest that the sustained flow response in HAEC may be partially mediated by nitric oxide production and release. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Journal of Membrane Biology Springer Journals

Fluid Flow Modulates Calcium Entry and Activates Membrane Currents in Cultured Human Aortic Endothelial Cells

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Publisher
Springer-Verlag
Copyright
Copyright © Inc. by 1999 Springer-Verlag New York
Subject
Life Sciences; Biochemistry, general; Human Physiology
ISSN
0022-2631
eISSN
1432-1424
D.O.I.
10.1007/s002329900565
Publisher site
See Article on Publisher Site

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