Quick Search:

uzh logo
Browse by:
bullet
bullet
bullet
bullet

Zurich Open Repository and Archive 

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-13380

Tanner, F C; van der Loo, B; Shaw, S; Greutert, H; Bachschmid, M M; Berrozpe, M; Rozenberg, I; Blau, N; Siebenmann, R; Schmidli, J; Meyer, P; Lüscher, T F (2007). Inactivity of nitric oxide synthase gene in the atherosclerotic human carotid artery. Basic Research in Cardiology, 102(4):308-317.

[img] PDF (Verlags-PDF) - Registered users only
2MB

Abstract

OBJECTIVE: Nitric oxide (NO) inhibits thrombus formation, vascular contraction, and smooth muscle cell proliferation. We investigated whether NO release is enhanced after endothelial NO synthase (eNOS) gene transfer in atherosclerotic human carotid artery ex vivo. METHODS AND RESULTS: Western blotting and immunohistochemistry revealed that transduction enhanced eNOS expression; however, neither nitrite production nor NO release measured by porphyrinic microsensor was altered. In contrast, transduction enhanced NO production in non-atherosclerotic rat aorta and human internal mammary artery. In transduced carotid artery, calcium-dependent eNOS activity was minimal and did not differ from control conditions. Vascular tetrahydrobiopterin concentrations did not differ between the experimental groups.Treatment of transduced carotid artery with FAD, FMN, NADPH, L-arginine, and either sepiapterin or tetrahydrobiopterin did not alter NO release. Superoxide formation was similar in transduced carotid artery and control. Treatment of transduced carotid artery with superoxide dismutase (SOD), PEG-SOD, PEG-catalase did not affect NO release. CONCLUSIONS: eNOS transduction in atherosclerotic human carotid artery results in high expression without any measurable activity of the recombinant protein. The defect in the atherosclerotic vessels is neither caused by cofactor deficiency nor enhanced NO breakdown. Since angioplasty is performed in atherosclerotic arteries,eNOS gene therapy is unlikely to provide clinical benefit.

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Center for Integrative Human Physiology
04 Faculty of Medicine > Institute of Physiology
07 Faculty of Science > Institute of Physiology
DDC:570 Life sciences; biology
610 Medicine & health
Language:English
Date:July 2007
Deposited On:20 Mar 2009 13:47
Last Modified:27 Nov 2013 17:17
Publisher:Springer
ISSN:0300-8428
Publisher DOI:10.1007/s00395-007-0650-7
PubMed ID:17356797
Citations:Web of Science®. Times Cited: 8
Google Scholar™
Scopus®. Citation Count: 10

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page