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(Arteriosclerosis, Thrombosis, and Vascular Biology. 2005;25:1817.)
© 2005 American Heart Association, Inc.

Vascular Biology

Shear Stress Induces Endothelial Differentiation From a Murine Embryonic Mesenchymal Progenitor Cell Line

Hao Wang; Gordon M. Riha; Shaoyu Yan; Min Li; Hong Chai; Hui Yang; Qizhi Yao; Changyi Chen

From the Molecular Surgeon Research Center, Division of Vascular Surgery and Endovascular Therapy, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Tex.

Correspondence to Changyi (Johnny) Chen, MD, PhD, Michael E. DeBakey Dept of Surgery, Baylor College of Medicine, 1 Baylor Plaza, Mail Stop NAB-2010, Houston, TX 77030. E-mail jchen{at}bcm.tmc.edu

Objective— Recent studies have illustrated that mesenchymal stem cells possess the potential to differentiate along an endothelial lineage, but the effect of shear on mesenchymal differentiation is unknown. Thus, we developed an in vitro shear stress system to examine the relationship between shear stress and the endothelial differentiation of a murine embryonic mesenchymal progenitor cell line, C3H/10T1/2.

Methods and Results— The parallel plate system of fluid shear stress was used. Shear stress significantly induced expression of mature endothelial cell–specific markers in CH3H/10T1/2 cells such as CD31, von Willebrand factor, and vascular endothelial–cadherin at both the mRNA and protein levels with real-time polymerase chain reaction and immunofluorescence analyses, respectively. In addition, shear-induced augmentation of functional markers of the mature endothelial phenotype such as uptake of acetylated low-density lipoproteins and formation of capillary-like structures on Matrigel. Furthermore, shear stress significantly upregulated angiogenic growth factors while downregulating growth factors associated with smooth muscle cell differentiation.

Conclusions— This study demonstrates, for the fist time, endothelial differentiation in a mesenchymal progenitor CH3H/10T1/2 cell line resulting from shear exposure. Thus, this analysis may serve as a basis for further understanding the effect of shear on mesenchymal and vascular cell differentiation.

Shear stress significantly induces expression of endothelial cell-specific markers such as CD31, vWF, and VE-cadherin in C3H/10T1/2, a murine embryonic mesenchymal progenitor cell line. In addition, shear induces augmentation of functional markers of the mature endothelial phenotype such as uptake of ac-LDL and formation of capillary-like structures on Matrigel.

Key Words: shear stress • differentiation • endothelial cells • C3H/10T1/2 cells • CD31 • von Willebrand factor

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Even Flow: Shear Cues Vascular Development

Cam Patterson
Arterioscler Thromb Vasc Biol 2005 25: 1761-1762. [Extract] [Full Text] [PDF]

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