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• W2100037882 abstract "The ketone body acetoacetate could be used as an alternate nutrient for the heart, and it also has the potential to improve cardiac function in an ischemic–reperfusion model or reduce the mitochondrial production of oxidative stress involved in cardiotoxicity. In this study, [11C]-acetoacetate was investigated as an early marker of intracellular damage in heart failure. A rat cardiotoxicity heart failure model was induced by doxorubicin, Dox(+). [14C]-Acetoacetate, a non-positron (β −) emitting radiotracer, was used to characterize the arterial blood input function and myocardial mitochondrial uptake. Afterward, [11C]-acetoacetate (β +) myocardial PET images were obtained for kinetic analysis and heart function assessment in control Dox(−) (n = 15) and treated Dox(+) (n = 6) rats. The uptake rate (K1) and myocardial clearance rate (k2 or kmono) were extracted. [14C]-Acetoacetate in the blood was increased in Dox(+), from 2 min post-injection until the last withdrawal point when the heart was harvested, as well as the uptake in the heart and myocardial mitochondria (unpaired t-test, p < 0.05). PET kinetic analysis of [11C]-acetoacetate showed that rate constants K1, k2 and kmono were decreased in Dox(+) (p < 0.05) combined with a reduction of 24% of the left ventricular ejection fraction (p < 0.001). Radioactive acetoacetate ex vivo analysis [14C], and in vivo kinetic [11C] studies provided evidence that [11C]-acetoacetate can assess heart failure Dox(+). Contrary to myocardial flow reserve (rest–stress protocol), [11C]-acetoacetate can be used to assess reduced kinetic rate constants without requirement of hyperemic stress response. The proposed [11C]-acetoacetate cardiac radiotracer in the investigation of heart disease is novel and paves the way to a potential role for [11C]-acetoacetate in cardiac pathophysiology." @default.
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• W2100037882 date "2014-11-01" @default.
• W2100037882 modified "2023-10-17" @default.
• W2100037882 title "[11C]-Acetoacetate PET imaging: a potential early marker for cardiac heart failure" @default.
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• W2100037882 doi "https://doi.org/10.1016/j.nucmedbio.2014.08.006" @default.
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