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Activation of negative regulators of the hypoxia-inducible factor (HIF) pathway in human end-stage heart failure.

Abstract：

:The hypoxia-inducible transcription factor HIF is induced early in acute myocardial ischemia in humans, but it is unknown whether this activation of HIF persists during chronic heart failure. The HIF system was characterized in left ventricular myocardia from 18 explanted failing hearts and 11 non-failing donor hearts by quantitative RT-PCR and Western analysis. HIF-1alpha mRNA levels were significantly decreased while its natural antisense transcript aHIF was nearly twofold higher (p<0.01) in failing myocardia than in control hearts. Moreover, compared to donor hearts a significantly increased expression of HIF-3alpha, which may act as a competitive inhibitor of HIF-1/2alpha activity, and PHD3, which upon hydroxylation of prolyl residues directs HIF-alpha subunits towards proteasomal degradation, was observed in the failing myocardium. Although negative regulators of HIF were induced, the HIF pathway obviously remains activated in chronic human heart failure, because prototype HIF target genes, such as ABCG2, VEGF, and BNIP3, were significantly induced.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Zolk O,Solbach TF,Eschenhagen T,Weidemann A,Fromm MF

doi

10.1016/j.bbrc.2008.08.152

subject

Has Abstract

pub_date

2008-11-14 00:00:00

pages

315-20

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(08)01689-6

journal_volume

376

pub_type

杂志文章

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