Prevention of cardiac dysfunction in acute coxsackievirus B3 cardiomyopathy by inducible expression of a soluble coxsackievirus-adenovirus receptor.
Abstract | BACKGROUND: METHODS AND RESULTS: We generated an inducible adenoviral vector (AdG12) for strict drug-dependent delivery of sCAR-Fc, a fusion protein composed of the coxsackievirus- adenovirus receptor (CAR) extracellular domains and the carboxyl terminus of human IgG1-Fc. Decoy receptor expression was strictly doxycycline dependent, with no expression in the absence of an inducer. CVB3 infection of HeLa cells was efficiently blocked by supernatant from AdG12-transduced cells, but only in the presence of doxycycline. After liver-specific transfer, AdG12 (plus doxycycline) significantly improved cardiac contractility and diastolic relaxation compared with a control vector in CVB3-infected mice if sCAR-Fc was induced before infection (left ventricular pressure 59+/-3.8 versus 45.4+/-2.7 mm Hg, median 59 versus 45.8 mm Hg, P<0.01; dP/dt(max) 3645.1+/-443.6 versus 2057.9+/-490.2 mm Hg/s, median 3526.6 versus 2072 mm Hg/s, P<0.01; and dP/dt(min) -2125.5+/-330.5 versus -1310.2+/-330.3 mm Hg/s, median -2083.7 versus -1295.9 mm Hg/s, P<0.01) and improved contractility if induced concomitantly with infection (left ventricular pressure 76.4+/-19.2 versus 56.8+/-10.3 mm Hg, median 74.8 versus 54.4 mm Hg, P<0.05; dP/dt(max) 5214.2+/-1786.2 versus 3011.6+/-918.3 mm Hg/s, median 5182.1 versus 3106.6 mm Hg/s, P<0.05), respectively. Importantly, hemodynamics of animals treated with AdG12 (plus doxycycline) were similar to uninfected controls. Preinfection induction of sCAR-Fc completely blocked and concomitant induction strongly reduced cardiac CVB3 infection, myocardial injury, and inflammation. CONCLUSIONS: AdG12-mediated sCAR-Fc delivery prevents cardiac dysfunction in CVB3 myocarditis under prophylactic and therapeutic conditions.
|
Authors | Sandra Pinkert, Dirk Westermann, Xiaomin Wang, Karin Klingel, Andrea Dörner, Konstantinos Savvatis, Tobias Grössl, Stefanie Krohn, Carsten Tschöpe, Heinz Zeichhardt, Katja Kotsch, Kerstin Weitmann, Wolfgang Hoffmann, Heinz-Peter Schultheiss, O Brad Spiller, Wolfgang Poller, Henry Fechner |
Journal | Circulation
(Circulation)
Vol. 120
Issue 23
Pg. 2358-66
(Dec 08 2009)
ISSN: 1524-4539 [Electronic] United States |
PMID | 19933937
(Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)
|
Chemical References |
- Receptors, Virus
- coxsackievirus B receptor
|
Topics |
- Acute Disease
- Animals
- Cardiomyopathies
(genetics, prevention & control, virology)
- Coxsackievirus Infections
(genetics, prevention & control)
- Gene Expression Regulation, Viral
- Genetic Therapy
(methods)
- HeLa Cells
- Humans
- Mice
- Mice, Inbred BALB C
- Myocarditis
(genetics, prevention & control, virology)
- Receptors, Virus
(administration & dosage, biosynthesis, genetics)
|
|
Join CureHunter, for free Research Interface BASIC access!
Take advantage of free CureHunter research engine access to explore the best drug and treatment options for any disease.
Find out why thousands of doctors, pharma researchers and patient activists
around the world use CureHunter every day.
Realize the full power of the drug-disease research graph!
|