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- W128515243 abstract "The ultimate goal of prophylactic gene therapy is to confer permanent protection against ischemia. Although gene therapy with iNOS is known to protect against myocardial infarction at 3 days and up to 2 months, the long-term effects of iNOS gene therapy on myocardial ischemic injury and function are unknown. To address this issue, we created a recombinant adeno-associated viral vector carrying the iNOS gene (rAAV/iNOS) which enables long-lasting transgene expression. Mice received injections in anterior LV wall of rAAV/LacZ or rAAV/iNOS; 1 year later, they underwent a 30-min coronary occlusion (O) and 4 h of reperfusion (R). iNOS gene transfer resulted in elevated iNOS protein expression (+ 2.9-fold vs. LacZ group, n=6, P<0.05; Fig ) and iNOS activity (+ 3.3-fold vs. LacZ group, n=4, P<0.05) 1 year later. Infarct size (% of risk region) was dramatically reduced at 1 year after iNOS gene transfer (13.5+/−2.2%, n=12, vs. 42.9+/−2.6%, n=12, in LacZ group; Fig ). The infarct-sparing effects of iNOS gene therapy at 1 year were as powerful as those observed 24 h after ischemic PC (six 4-min O/4-min R cycles) (16.3+/−2.3%, n=8; Fig ). Importantly, compared with the LacZ group (n=11), iNOS gene transfer (n=10) had no effect on LV dimensions or function for up to 1 year (at 1 year: LVEDD 4.4+/−0.1 vs. 4.2+/−0.2 mm; LVESD 2.9+/−0.1 vs. 2.9+/−0.2 mm; FS 34+/−1.8 vs. 32+/−2.6%; EF 56+/−2.3 vs. 60+/−2.9%) (echocardiography). These data demonstrate, for the first time, that rAAV-mediated iNOS gene transfer affords long-term, probably permanent (1 year) cardioprotection without adverse functional consequences, providing a strong rationale for further preclinical testing of prophylactic gene therapy." @default.
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- W128515243 date "2008-10-28" @default.
- W128515243 modified "2023-09-26" @default.
- W128515243 title "Abstract 5423: rAAV-Mediated Gene Therapy with Inducible Nitric Oxide Synthase (iNOS) Affords Permanent Cardioprotection (1 Year) without Adverse Functional Consequences" @default.
- W128515243 doi "https://doi.org/10.1161/circ.118.suppl_18.s_547-d" @default.
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