EUK-8, a Superoxide Dismutase and Catalase Mimetic, Reduces Cardiac Oxidative Stress and Ameliorates Pressure Overload-Induced Heart Failure in the Harlequin Mouse Mutant
Key result
Low-dose EUK-8 improves survival and LV function while reducing hypertrophy and fibrosis in pressure-overloaded mice.
Why the study?
To identify apoptosis-inducing factor as a cardiac mitochondrial antioxidant and evaluate whether EUK-8 protects AIF-deficient myocardium against pressure overload.
Does EUK-8 improve survival and reduce cardiac remodeling in Hq mutant and WT mice subjected to pressure overload?
Population
Hq mutant mice and wild-type counterparts subjected to pressure overload
Comparison
Low-dose EUK-8 (25 mg/kg/day) vs vehicle
Design
Animal experimental study
Follow-up
4 weeks
Authors
Discussion
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Member takes
Implication
EUK-8 attenuates remodeling in overloaded mouse hearts; leaves open translation to human HF.
Key Points
- This research aims to evaluate the efficacy of EUK-8 as an antioxidant in protecting the heart from oxidative stress-related damage during pressure overload.
- EUK-8 (25 mg/kg/day) or vehicle administered to harlequin and wild-type mice for 4 weeks under pressure overload conditions.
- Assessment of myocardial geometry and function through echocardiography after treatment.
- Examination of the effects on myocardial oxidative stress, cell death, hypertrophy, and fibrosis.
- EUK-8 improved survival rates in both harlequin and wild-type mice subjected to pressure overload.
- Left ventricular end-systolic dimensions and fractional shortening were improved, along with reduced cardiac hypertrophy and fibrosis.
- The treatment prevented oxidant stress and decreased necrotic and apoptotic cell death.
Structured PICO
Does EUK-8 improve survival and reduce cardiac remodeling in Hq mutant and WT mice subjected to pressure overload?
P
Population
Oxidative stress-sensitized Hq mutant mice and wild-type counterparts subjected to pressure overload for 4 weeks.
I
Intervention
EUK-8 (25 mg/kg/day) for 4 weeks
C
Comparator
Vehicle
O
Outcome
Survival, myocardial geometry and function, myocardial oxidant stress, cell death, cardiac hypertrophy and fibrosissurrogate
EUK-8 protects against pressure overload-induced heart failure in both oxidative stress-prone Hq mice and WT mice, suggesting a potential therapeutic role for mitochondrial antioxidants in heart failure.
Cite This Study
Empel et al. (2006) studied Pressure overload-induced heart failure. EUK-8 vs. Vehicle was evaluated on Survival, left ventricular end-systolic dimensions, fractional shortening, myocardial oxidant stress, cell death, cardiac hypertrophy and fibrosis. Low-dose EUK-8 ameliorated survival, improved left ventricular function, and attenuated cardiac hypertrophy and fibrosis in both Hq mutant and wild-type mice subjected to pressure overload.