Abstract | OBJECTIVE: Left ventricular assist devices (LVAD) have been used to 'bridge' patients with end-stage heart failure to transplantation. Although several reports have suggested that the native ventricular function recovers after long-term LVAD support, a process called 'reverse remodeling', the underlying biological mechanisms are still unknown. As the transcription factor nuclear factor-kappaB ( NF-kappaB) has been shown to be active in the failing human heart, we examined whether its activity is altered under LVAD support, and may thus contribute to the dynamic process of 'reverse remodeling'. METHODS: RESULTS: 15 patients out of 16 showed a significant decrease in the number of NF-kappaB positive cardiomyocyte nuclei after LVAD support in the left ventricular myocardium. The NF-kappaB DNA-binding activity also decreased after LVAD support as measured by gel-shift analysis. While the number of positive cardiomyocytes was significantly higher in the subendocardium than in the subepicardium at the time of LVAD implantation, this difference was no longer present at the time of LVAD explantation. The diameter of cardiomyocytes in the left ventricle decreased significantly as a parameter of structural reverse remodeling. CONCLUSION: LVAD support decreases the extent of NF-kappaB activation in failing human hearts, suggesting that NF-kappaB may be involved in the process of 'reverse remodeling'.
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Authors | Florian Grabellus, Bodo Levkau, Andrea Sokoll, Hendryk Welp, Christof Schmid, Mario C Deng, Atsushi Takeda, Günter Breithardt, Hideo A Baba |
Journal | Cardiovascular research
(Cardiovasc Res)
Vol. 53
Issue 1
Pg. 124-30
(Jan 2002)
ISSN: 0008-6363 [Print] England |
PMID | 11744020
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
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Topics |
- Adult
- Autoradiography
- Cardiomyopathy, Dilated
(complications, metabolism, therapy)
- Electrophoresis, Polyacrylamide Gel
- Electrophoretic Mobility Shift Assay
- Female
- Heart Failure
(etiology, metabolism, therapy)
- Heart-Assist Devices
- Humans
- Male
- Middle Aged
- Myocardial Ischemia
(complications, metabolism, therapy)
- Myocarditis
(complications, metabolism, therapy)
- Myocardium
(chemistry, metabolism)
- NF-kappa B
(analysis, metabolism)
- Tetralogy of Fallot
(complications, metabolism, therapy)
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