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17.05.2024 | Mitochondria at the heart of cardioprotection

Comparison of the stage-dependent mitochondrial changes in response to pressure overload between the diseased right and left ventricle in the rat

verfasst von: Ling Li, Bernd Niemann, Fabienne Knapp, Sebastian Werner, Christian Mühlfeld, Jan Philipp Schneider, Liane M. Jurida, Nicole Molenda, M. Lienhard Schmitz, Xiaoke Yin, Manuel Mayr, Rainer Schulz, Michael Kracht, Susanne Rohrbach

Erschienen in: Basic Research in Cardiology

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Abstract

The right ventricle (RV) differs developmentally, anatomically and functionally from the left ventricle (LV). Therefore, characteristics of LV adaptation to chronic pressure overload cannot easily be extrapolated to the RV. Mitochondrial abnormalities are considered a crucial contributor in heart failure (HF), but have never been compared directly between RV and LV tissues and cardiomyocytes. To identify ventricle-specific mitochondrial molecular and functional signatures, we established rat models with two slowly developing disease stages (compensated and decompensated) in response to pulmonary artery banding (PAB) or ascending aortic banding (AOB). Genome-wide transcriptomic and proteomic analyses were used to identify differentially expressed mitochondrial genes and proteins and were accompanied by a detailed characterization of mitochondrial function and morphology. Two clearly distinguishable disease stages, which culminated in a comparable systolic impairment of the respective ventricle, were observed. Mitochondrial respiration was similarly impaired at the decompensated stage, while respiratory chain activity or mitochondrial biogenesis were more severely deteriorated in the failing LV. Bioinformatics analyses of the RNA-seq. and proteomic data sets identified specifically deregulated mitochondrial components and pathways. Although the top regulated mitochondrial genes and proteins differed between the RV and LV, the overall changes in tissue and cardiomyocyte gene expression were highly similar. In conclusion, mitochondrial dysfuntion contributes to disease progression in right and left heart failure. Ventricle-specific differences in mitochondrial gene and protein expression are mostly related to the extent of observed changes, suggesting that despite developmental, anatomical and functional differences mitochondrial adaptations to chronic pressure overload are comparable in both ventricles.
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Metadaten
Titel
Comparison of the stage-dependent mitochondrial changes in response to pressure overload between the diseased right and left ventricle in the rat
verfasst von
Ling Li
Bernd Niemann
Fabienne Knapp
Sebastian Werner
Christian Mühlfeld
Jan Philipp Schneider
Liane M. Jurida
Nicole Molenda
M. Lienhard Schmitz
Xiaoke Yin
Manuel Mayr
Rainer Schulz
Michael Kracht
Susanne Rohrbach
Publikationsdatum
17.05.2024
Verlag
Springer Berlin Heidelberg
Erschienen in
Basic Research in Cardiology
Print ISSN: 0300-8428
Elektronische ISSN: 1435-1803
DOI
https://doi.org/10.1007/s00395-024-01051-3

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