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Title:
CypD−/− hearts have altered levels of proteins involved in Krebs cycle, branch chain amino acid degradation and pyruvate metabolism
Description:
Supporting: 9, Contrasting: 1, Mentioning: 46 - Cyclophilin D (CypD) is a mitochondrial chaperone that has been shown to regulate the mitochondrial permeability transition pore (MPTP). MPTP opening is a major determinant of mitochondrial dysfunction and cardiomyocyte death during ischemia/reperfusion (I/R) injury. Mice lacking CypD have been widely used to study regulation of the MPTP, and it has been shown recently that genetic depletion of CypD correlates with elevated levels of mitochondrial Ca2+. The present study aimed to characterize the metabolic changes in CypD−/− hearts. Initially, we used a proteomics approach to examine protein changes in CypD−/− mice. Using pathway analysis we found that CypD−/− hearts have alteration in branched chain amino acid metabolism, pyruvate metabolism and the Krebs cycle. We tested whether these metabolic changes were due to inhibition of electron transfer from these metabolic pathways into the electron transport chain. As we found decreased levels of succinate dehydrogenase and electron transfer flavoprotein in the proteomics analysis, we examined whether activities of these enzymes might be altered. However, we found no alterations in their activities. The proteomics study also showed a 23% decrease in carnitine -palmitoyltransferase 1 (CPT1), which prompted us to perform a metabolomics analysis. Consistent with the decrease in CPT1, we found a significant decrease in C4/Ci4, C5-OH/C3-DC, C12:1, C14:1, C16:1, and C20:3 acyl carnitines in hearts from CypD−/− mice. In summary, CypD−/− hearts exhibit changes in many metabolic pathways and caution should be used when interpreting results from these mice as due solely to inhibition of the MPTP.
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Keywords {🔍}
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Topics {✒️}
advanced search capabilities introduction mentioning confidence smart citation index scholarly content—building ethical blog terms smart citation cyclophilin ai-powered research tool google privacy policy 56 citation statements results supporting confidence myocardial ischemia–reperfusion injury metabolic cha… show mitochondrial fatty acid copyright-compliant research social anxiety disorder transparent ai tools regulate mitochondrial metabolism scite assistant examined neural activity research solutions family set email alerts socially anxious individuals fresh perspective alam1 impair cardiovascular physiology adult female rats present study aimed current study examined acetylated mitochondrial proteome altered mitochondrial acetylation feared social stimuli previous studies reporting mice lacking cypd evaluate scientific literature key enzymes involved increased lysine acetylation cypd ko heart show abstract “… cypd ko hearts tissue service apply dashboard cited metabolic processes metabolic pathways [48 research solutions ischemia/reperfusion mitochondrial acetylome speech anticipation information overload mitochondrial proteins social stimuli
Schema {🗺️}
PublicationIssue:
id:#issue
datePublished:2013
isPartOf:
id:#periodical
type:
PublicationVolume
Periodical
name:Journal of Molecular and Cellular Cardiology
issn:
0022-2828
volumeNumber:56
publisher:Elsevier BV
["PublicationVolume","Periodical"]:
id:#periodical
name:Journal of Molecular and Cellular Cardiology
issn:
0022-2828
volumeNumber:56
publisher:Elsevier BV
ScholarlyArticle:
isPartOf:#issue
description:Cyclophilin D (CypD) is a mitochondrial chaperone that has been shown to regulate the mitochondrial permeability transition pore (MPTP). MPTP opening is a major determinant of mitochondrial dysfunction and cardiomyocyte death during ischemia/reperfusion (I/R) injury. Mice lacking CypD have been widely used to study regulation of the MPTP, and it has been shown recently that genetic depletion of CypD correlates with elevated levels of mitochondrial Ca2+. The present study aimed to characterize the metabolic changes in CypDâ/â hearts. Initially, we used a proteomics approach to examine protein changes in CypDâ/â mice. Using pathway analysis we found that CypDâ/â hearts have alteration in branched chain amino acid metabolism, pyruvate metabolism and the Krebs cycle. We tested whether these metabolic changes were due to inhibition of electron transfer from these metabolic pathways into the electron transport chain. As we found decreased levels of succinate dehydrogenase and electron transfer flavoprotein in the proteomics analysis, we examined whether activities of these enzymes might be altered. However, we found no alterations in their activities. The proteomics study also showed a 23% decrease in carnitine -palmitoyltransferase 1 (CPT1), which prompted us to perform a metabolomics analysis. Consistent with the decrease in CPT1, we found a significant decrease in C4/Ci4, C5-OH/C3-DC, C12:1, C14:1, C16:1, and C20:3 acyl carnitines in hearts from CypDâ/â mice. In summary, CypDâ/â hearts exhibit changes in many metabolic pathways and caution should be used when interpreting results from these mice as due solely to inhibition of the MPTP.
abstract:Cyclophilin D (CypD) is a mitochondrial chaperone that has been shown to regulate the mitochondrial permeability transition pore (MPTP). MPTP opening is a major determinant of mitochondrial dysfunction and cardiomyocyte death during ischemia/reperfusion (I/R) injury. Mice lacking CypD have been widely used to study regulation of the MPTP, and it has been shown recently that genetic depletion of CypD correlates with elevated levels of mitochondrial Ca2+. The present study aimed to characterize the metabolic changes in CypDâ/â hearts. Initially, we used a proteomics approach to examine protein changes in CypDâ/â mice. Using pathway analysis we found that CypDâ/â hearts have alteration in branched chain amino acid metabolism, pyruvate metabolism and the Krebs cycle. We tested whether these metabolic changes were due to inhibition of electron transfer from these metabolic pathways into the electron transport chain. As we found decreased levels of succinate dehydrogenase and electron transfer flavoprotein in the proteomics analysis, we examined whether activities of these enzymes might be altered. However, we found no alterations in their activities. The proteomics study also showed a 23% decrease in carnitine -palmitoyltransferase 1 (CPT1), which prompted us to perform a metabolomics analysis. Consistent with the decrease in CPT1, we found a significant decrease in C4/Ci4, C5-OH/C3-DC, C12:1, C14:1, C16:1, and C20:3 acyl carnitines in hearts from CypDâ/â mice. In summary, CypDâ/â hearts exhibit changes in many metabolic pathways and caution should be used when interpreting results from these mice as due solely to inhibition of the MPTP.
sameAs:https://doi.org/10.1016/j.yjmcc.2012.12.004
pagination:81-90
name:CypDâ/â hearts have altered levels of proteins involved in Krebs cycle, branch chain amino acid degradation and pyruvate metabolism
headline:CypDâ/â hearts have altered levels of proteins involved in Krebs cycle, branch chain amino acid degradation and pyruvate metabolism
author:
Sara Menazza
Renee Wong
Tiffany Nguyen
Guanghui Wang
Marjan GuÄek
Elizabeth Murphy
publisher:
type:Organization
name:Elsevier BV
datePublished:2013
Organization:
name:Elsevier BV
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