Morphologic adaptation of arterial endothelial cells to longitudinal stretch in organ culture

JOURNAL OF BIOMECHANICS

卷:41

Article

Lee, Yong-Ung¹  Drury-Stewart, Danielle²  Vito, Raymond P.²  Han, Hai-Chao¹ 

[1] Univ Texas San Antonio, Dept Mech Engn, San Antonio, TX 78249 USA

[2] Georgia Inst Technol, Georgia Tech Emory Ctr Engn Living Tissues, Atlanta, GA 30332 USA

关键词: Endothelium;    Axial stretch;    Cell shape;    Cell proliferation;    Ex vivo;    Artery;    Porcine;   

DOI  :  10.1016/j.jbiomech.2008.08.016

来源: Elsevier

【 摘 要 】

Arteries in vivo are subjected to large longitudinal stretch, which changes significantly due to vascular disease and surgery. However, little is known about the effect of longitudinal stretch on arterial endothelium. The aim of this study was to determine the morphologic adaptation of arterial endothelial cells (ECs) to elevated axial stretch. Porcine carotid arteries were stretched 20% more than their in vivo length while being maintained at physiological pressure and flow rate in an organ culture system. The ECs were elongated with the application of the axial stretch (aspect ratio 2.81 +/- 0.25 versus 3.65 +/- 0.38, n = 8, p < 0.001). The elongation was slightly decreased after three days and the ECs recovered their normal shape after seven days, as measured by the shape index and aspect ratio (0.55 +/- 0.03 versus 0.56 +/- 0.04, and 2.93 +/- 0.28 versus 2.88 +/- 0.20, respectively, n = 5). Cell proliferation was increased in the intima of stretched arteries in three days as compared to control arteries but showed no difference after seven days in organ culture. These results demonstrate that the ECs adapt to axial stretch and maintain their normal shape. (C) 2008 Elsevier Ltd. All rights reserved.

【 授权许可】

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