Tissue engineering of a collagen-based vascular media Demonstration of functionality

被引:7
作者
Schutte, Stacey C. [1 ]
Chen, Zhenzhen [2 ]
Brockbank, Kelvin G. M. [1 ,2 ]
Nerem, Robert M. [1 ]
机构
[1] Georgia Inst Technol, Inst Bioengn & Biosci, Atlanta, GA 30332 USA
[2] Cell & Tissue Syst Inc, N Charleston, SC USA
关键词
smooth muscle cells; tissue engineering; blood vessel; vasoconstriction/dilation; cell phenotype; MUSCLE ACTIN EXPRESSION; EXTRACELLULAR-MATRIX PRODUCTION; COMMON CAROTID-ARTERY; MECHANICAL STRENGTH; BLOOD-VESSELS; IN-VITRO; ALPHA; CRYOPRESERVATION; BRADYKININ; RABBIT;
D O I
10.4161/org.6.4.12651
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The property of vasoactivity is important for both resistance vessels and larger arteries. Evaluation of smooth muscle cell phenotype is often done in place of functional testing in engineered tissues, assuming a direct correlation between cell phenotype and tissue contractile force. In this study we look at a large panel of vasoactive agents to determine the functionality of our collagen-based tissue. The engineered vascular media elicited a measurable change in force in response to seven of the nine agents used. As part of this characterization, TGF beta(1) and TNF alpha were used to promote a more contractile and synthetic cell phenotype respectively. Both smooth muscle alpha-actin and vasoconstriction were evaluated in ring sections. Due to large differences in cell-compaction and cell distribution in the tissues, no correlation was found between alpha-actin expression and contractile strength. This highlights the need for functional testing of engineered tissue and the importance of cell-matrix interactions in vasoactivity.
引用
收藏
页码:204 / 211
页数:8
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