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- W2040806721 abstract "Darbepoetin alpha (DA), a long-acting erythropoietin derivative stimulating erythropoiesis, can, by antiapoptotic effects, mitigate myocardial I/R injury. We tested the hypothesis that DA treatment improves left ventricular function (LV) in LPS evoked cardiomyopathy and alters gene expression of apoptosis-regulating proteins (Bcl-XL, Bcl-2, Bax, and Bcl-Xs) and TNF-alpha. In a prospective, controlled, randomized study in Lewis rats (n = 56; 8 groups), myocardial depression was evoked by LPS administration (serotype O127:B8; 10 mg/kg, i.p.). Darbepoetin alpha or vehicle was injected either 24 h before (pretreatment) or 2 h after LPS injection (treatment). Hearts were isolated 8 h after LPS injection, perfused (Krebs-Henseleit solution) in a Langendorff apparatus, and LV developed pressure and its derivatives were measured. For gene expression analysis, real-time polymerase chain reaction of LV specimen was performed. LPS decreased LV developed pressure (-64.6 +/- 7.9 mmHg) and its derivates by more than 60% in comparison to vehicle (P < 0,01), but this effect was not attenuated by DA pretreatment or DA treatment. LPS administration increased gene expression of Bcl-Xs, Bax, and TNF-alpha, but this was not altered by DA pretreatment. Furthermore, there was no effect on Bcl-Xl and Bcl-2 expression by DA alone. Whereas proapoptotic genes of the myocardium are up-regulated in LPS-induced cardiomyopathy, neither DA pretreatment nor treatment has significant effects on LV function or gene expression. This may suggest cardiac resistance to darbepoetin in LPS-mediated sepsis." @default.
- W2040806721 created "2016-06-24" @default.
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- W2040806721 date "2009-01-01" @default.
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- W2040806721 title "DARBEPOETIN α, A LONG-ACTING ERYTHROPOEITIN DERIVATE, DOES NOT ALTER LPS EVOKED MYOCARDIAL DEPRESSION AND GENE EXPRESSION OF BAX, BCL-XS, BCL-XL, BCL-2, AND TNF-α" @default.
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- W2040806721 doi "https://doi.org/10.1097/shk.0b013e31817c0188" @default.
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