Fluid shear stress upregulated endothelial nitric oxide synthase gene expression and nitric oxide formation in human endothelial progenitor cells / 中华心血管病杂志
Chinese Journal of Cardiology
;
(12): 359-362, 2007.
Article
in Chinese
| WPRIM
| ID: wpr-304904
ABSTRACT
<p><b>OBJECTIVE</b>To observe the effect of fluid shear stress on the eNOS gene expression and NO production in endothelial progenitor cells (EPCs).</p><p><b>METHODS</b>The peripheral blood mononuclear cells from healthy volunteers were inducted into EPCs and divided into stationary group (0 dyn/cm(2), 1 dyn/cm(2) = 0.1 Pa), low-flow shear stress group (5 dyn/cm(2)), medium-flow shear stress group (15 dyn/cm(2)) and high-flow shear stress group (25 dyn/cm(2)). The effects of shear stress on the endothelial nitric oxide synthase (eNOS) gene expression and nitric oxide (NO) production in human EPCs were measured.</p><p><b>RESULTS</b>Typical "spindle-shaped" appearance was shown in EPCs derived from peripheral blood mononuclear cells and were positively labeled by acetylated-LDL, lectin, FLK-1 and vWF. After 4 hours treatment with various shear stresses, the ratio of eNOS/beta-actin mRNA expression by human EPCs in low, medium and high-flow shear stress group was 0.364, 0.505 and 0.548 respectively, which was significantly higher than that in stationary group (0.183, all P < 0.05) and the NO secretion in human EPCs in low, medium and high-flow shear stress group was also significantly higher than that in stationary group (all P < 0.05).</p><p><b>CONCLUSION</b>Fluid shear stress enhances the eNOS mRNA expression and NO secretion in human EPCs, therefore, shear stress could potentiate the repair efficacy of EPCs for endothelial injury.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Stem Cells
/
Stress, Mechanical
/
Cell Differentiation
/
Cells, Cultured
/
Bodily Secretions
/
Cell Biology
/
Endothelial Cells
/
Nitric Oxide Synthase Type III
/
Genetics
/
Metabolism
Limits:
Humans
Language:
Chinese
Journal:
Chinese Journal of Cardiology
Year:
2007
Type:
Article
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