Tissue-engineered human vascular media with a functional endothelin system.
|Authors:||Laflamme, Karina; Roberge, Charles; Labonté, Julie; Pouliot, Stéphanie; D’Orléans-Juste, Pedro; Auger, François A.; Germain, Lucie|
|Abstract:||Background— Cardiovascular diseases remain a major cause of death and disability in the Western world. Among the various approaches adopted to counteract the morbidity associated with these diseases, surgical procedures and cardiac and vascular xenotransplantations or allotransplantations are routinely performed. The suitable vascular graft would be as close as possible to the native and healthy vessel composed exclusively of human components provided by the patient and would adapt to the donor’s hemodynamics. We have developed such a tissue-engineered human blood vessel reconstructed with human cells. Because endothelin is the most potent vasopressor known to date, we were interested in investigating the functionality of the endothelinergic system in our reconstructed human blood vessel. Methods and Results— Vasoconstriction studies were performed with nonselective and selective agonists and antagonists to demonstrate that ETA receptors were present and functional in tissue-engineered human vascular media constructed with the self-assembly method. Reverse-transcriptase polymerase chain reaction studies demonstrated that mRNA of the ETA but not the ETB receptor was present in these human tissue–engineered blood vessels. Furthermore, we demonstrated that the endothelin-converting enzyme, the main enzyme responsible for the formation of the biologically active endothelin peptides, was present and functional in these same bioengineered vascular media. Conclusions— Our results suggest that the media component of our tissue-engineered blood vessel has the potential of controlling vascular resistance via the presence of functional endothelin ETA receptors and endothelin-converting enzyme. endothelinmuscle contractionmyocytes, smooth m|
|Document Type:||Article de recherche|
|Issue Date:||1 February 2005|
|Open Access Date:||Restricted access|
|This document was published in:||Circulation, Vol. 111 (4), 459–464 (2005)|
American Heart Association etc
|Collection:||Articles publiés dans des revues avec comité de lecture|
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