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Table of Contents
Vol. 13, No. 2, 2003
Issue release date: 2003
Section title: Original Paper
Cell Physiol Biochem 2003;13:075–084
(DOI:10.1159/000070251)

Fluid Shear Stress Differentially Regulates gpr3, gpr6, and gpr12 Expression in Human Umbilical Vein Endothelial Cells

Uhlenbrock K.1 · Huber J.1 · Ardati A.2 · Busch A.E.1 · Kostenis E.1
1Aventis Pharma, Cardiovascular Disease Group, Frankfurt/Main, 2Aventis Pharmaceuticals, Respiratory Disease Group, Bridgewater

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Published online: February 28, 2003
Issue release date: 2003

Number of Print Pages: 10
Number of Figures: 0
Number of Tables: 0

ISSN: 1015-8987 (Print)
eISSN: 1421-9778 (Online)

For additional information: http://www.karger.com/CPB

Abstract

Fluid shear stress is a major factor involved in the control of gene expression in vascular endothelial cells. Sphingosine 1-phosphate has emerged as a multifaceted regulator of endothelial cell function and its high affinity S1P1 receptor is one among the many shear stress regulated genes. We recently identified the orphan G protein coupled receptors gpr3, gpr6 and gpr12 as additional S1P receptors. Here, we investigated their expression in various human endothelial and vascular smooth muscle cell lines via RT-PCR and western blot analysis. We next sought to determine the role of fluid shear stress in the regulation of expression of gpr3, gpr6 and gpr12 by using human umbilical vein endothelial cells (HUVECs). Laminar shear stress (12dyne/cm2) did not significantly increase gpr3, gpr6 and gpr12 mRNA after 1, 2, 4, 6, and 8 hrs of application of elevated pressure as determined by quantitative Taqman RT-PCR analysis. In contrast, gpr3 and gpr12 protein were increased after 12 hrs of shear stress by 95% and 40%, respectively. gpr6 mRNA and protein were absent in HUVECs as determined by Taqman and western blot techniques. Our results suggest that shear stress regulates gpr3 and gpr12 but not gpr6 expression and that regulation does not occur transcriptionally but posttranslationally. gpr3 and gpr12 may therefore add to the repertoire of S1P receptors, translating extracellular S1P effects into intracellular signals in human endothelial cells.

© 2003 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Published online: February 28, 2003
Issue release date: 2003

Number of Print Pages: 10
Number of Figures: 0
Number of Tables: 0

ISSN: 1015-8987 (Print)
eISSN: 1421-9778 (Online)

For additional information: http://www.karger.com/CPB


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Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
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