Regulation and adaptation of shear stress-sensitive ion channels in vascular endothelial cells

Deborah Lieu, P. A. Pappone, A. I. Barakat

Research output: Contribution to journalArticle

Abstract

This study investigated factors regulating SSK and SSCI current activation and the adaptation of these currents in chronically-sheared BAECs using whole-cell patch-clamp recordings. In unsheared BAECs, steady flow increased SSK and SSCl conductance by 14±1% and 76±19%, respectively. Pretreatment of the cells with 0.5 μg/ml PTX 3 hours abolished the flowinduced SSK and SSCl conductance increase. Direct and sustained G protein activation with 1 mM GTP-γS without flow transiently activated G proteinregulated currents. Subsequent exposure of these cells to steady flow did not significantly increase SSK or SSCl conductance, suggesting that activation of G proteins is necessary to induce these currents. Flow also increased SSK and SSCl conductance in chronically-sheared, flow-elongated BAECs.

Original languageEnglish (US)
JournalAnnals of Biomedical Engineering
Volume28
Issue numberSUPPL. 1
StatePublished - 2000

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Endothelial cells
Shear stress
Chemical activation
Steady flow
Ions
Proteins
Clamping devices
Cells

ASJC Scopus subject areas

  • Biomedical Engineering

Cite this

Regulation and adaptation of shear stress-sensitive ion channels in vascular endothelial cells. / Lieu, Deborah; Pappone, P. A.; Barakat, A. I.

In: Annals of Biomedical Engineering, Vol. 28, No. SUPPL. 1, 2000.

Research output: Contribution to journalArticle

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