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Research Paper

Adenoviral-Mediated Gene Transfer of Nitric Oxide Synthase Isoforms and Vascular Cell Proliferation

Cooney R. · Hynes S.O. · Duffy A.M. · Sharif F. · O’Brien T.

Author affiliations

Regenerative Medicine Institute (REMEDI), National Centre for Biomedical Engineering Sciences (NCBES), National University of Ireland, Galway, Ireland

Related Articles for ""

J Vasc Res 2006;43:462–472

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Article / Publication Details

First-Page Preview
Abstract of Research Paper

Received: November 02, 2005
Accepted: June 06, 2006
Published online: September 20, 2006
Issue release date: September 2006

Number of Print Pages: 11
Number of Figures: 8
Number of Tables: 0

ISSN: 1018-1172 (Print)
eISSN: 1423-0135 (Online)

For additional information: http://www.karger.com/JVR

Abstract

Objective: Many vascular diseases are associated with reduced nitric oxide (NO) bioavailability. Nitric oxide synthase (NOS) gene therapy to the vasculature is a possible treatment for vascular disease as a means of increasing NO bioavailability, and this may be achieved using any of the NOS isoforms. The aim of our study was to compare the effects of adenoviral-mediated overexpression of the most commonly used NOS isoforms eNOS and iNOS on vascular cell proliferation. Methods: Human coronary artery smooth muscle cells (HCSMCs) and human umbilical vein endothelial cells (HUVECs) were transduced with adenoviral vectors encoding eNOS or iNOS at a multiplicity of infection of 100. Control cells were exposed to AdNull (empty vector) or diluent alone. Transgene expression was sought by Western blotting. The Greiss assay was used to measure nitrite levels. Cell proliferation was assessed by cell counting on days 0, 3 and 6. Apoptosis was sought using FACS analysis. Angiogenesis was measured using a commercially available in vitro kit. Results: Expression of both isoforms was detected in transduced cells by Western blot at all three time points. NOS transduction resulted in increased nitrite levels with higher levels seen in iNOS- compared to eNOS-transduced cells. Cell proliferation was diminished in AdeNOS- and AdiNOS-transduced cells compared with non-transduced cells on days 3 and 6 in both HCSMCs and HUVECs. Apoptosis was not detected in either cell line with either of the isoforms at any timepoint studied. Both eNOS and iNOS gene transfer caused a reduction in angiogenesis. Conclusions: NOS gene transfer to both endothelial and vascular smooth muscle cells is antiproliferative and antiangiogenic. The biological effect is identical with both isoforms and there is no evidence to support a differential effect on endothelial and vascular smooth muscle cell biology.

© 2006 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Research Paper

Received: November 02, 2005
Accepted: June 06, 2006
Published online: September 20, 2006
Issue release date: September 2006

Number of Print Pages: 11
Number of Figures: 8
Number of Tables: 0

ISSN: 1018-1172 (Print)
eISSN: 1423-0135 (Online)

For additional information: http://www.karger.com/JVR


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