Narrow time window of metabolic changes associated with transition to overt heart failure in Tgaq44 mice

•Glucolytic flux dominates in adaptive hypertrophy and heart failure end-stage.•Increase in fatty acid metabolism characterize transition to overt heart failure.•A causal relationship between structure damage, overactivation PPARα and FA flux in transition phase is suggestive.•Therapeutic time windo...

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Veröffentlicht in:Pharmacological reports 2016-08, Vol.68 (4), p.707-714
Hauptverfasser: Czarnowska, Elżbieta, Bierła, Joanna B., Toczek, Marta, Tyrankiewicz, Urszula, Pająk, Beata, Domal-Kwiatkowska, Dorota, Ratajska, Anna, Smoleński, Ryszard T., Mende, Ulrike, Chłopicki, Stefan
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container_title Pharmacological reports
container_volume 68
creator Czarnowska, Elżbieta
Bierła, Joanna B.
Toczek, Marta
Tyrankiewicz, Urszula
Pająk, Beata
Domal-Kwiatkowska, Dorota
Ratajska, Anna
Smoleński, Ryszard T.
Mende, Ulrike
Chłopicki, Stefan
description •Glucolytic flux dominates in adaptive hypertrophy and heart failure end-stage.•Increase in fatty acid metabolism characterize transition to overt heart failure.•A causal relationship between structure damage, overactivation PPARα and FA flux in transition phase is suggestive.•Therapeutic time window for modulation of fatty acid metabolism is relatively narrow. The timing and consequences of alternations in substrate utilization in heart failure (HF) and their relationship with structural changes remain unclear. This study aimed to analyze metabolic changes associated with transition to overt heart failure in transgenic mouse model of HF resulting from cardiac-specific overexpression of constitutively active Gαq*. Structural changes quantified by morphometry, relative cardiac mRNA and protein expression of PPARα, FAT/CD36, CPT-1, GLUT-4 and glycolytic efficiency following administration of 1-13C glucose were investigated in 4–14-month-old Tgαq*44 mice (TG), compared with age-matched FVB wild type mice (WT). Initial hypertrophy in TG (4–10-month of age) was featured by an accelerated glycolytic pathway that was not accompanied by structural changes in cardiomyocytes. In 10-month-old TG, cardiomyocyte elongation and hypertrophic remodeling and increased glycolytic flux was accompanied by relatively low expression of FAT/CD36, CPT-1 and PPARα. During the transition phase (12-month-old TG), a pronounced increase in PPARα with an increase in relative fatty acid (FA) flux was associated with anomalies of cardiomyocytes with accumulation of lipid droplets and glycogen as well as cell death. At the stage of overt heart failure (14-month-old TG), an accelerated glycolytic pathway with a decline in FA oxidation was accompanied by further structural changes. Tgαq*44 mice display three distinct phases of metabolic/structural changes during hypertrophy and progression to HF, with relatively short period of increase in FA metabolism, highlighting a narrow metabolic changes associated with transition to overt heart failure in Tgaq*44 mice that have therapeutic significance.
doi_str_mv 10.1016/j.pharep.2016.03.013
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The timing and consequences of alternations in substrate utilization in heart failure (HF) and their relationship with structural changes remain unclear. This study aimed to analyze metabolic changes associated with transition to overt heart failure in transgenic mouse model of HF resulting from cardiac-specific overexpression of constitutively active Gαq*. Structural changes quantified by morphometry, relative cardiac mRNA and protein expression of PPARα, FAT/CD36, CPT-1, GLUT-4 and glycolytic efficiency following administration of 1-13C glucose were investigated in 4–14-month-old Tgαq*44 mice (TG), compared with age-matched FVB wild type mice (WT). Initial hypertrophy in TG (4–10-month of age) was featured by an accelerated glycolytic pathway that was not accompanied by structural changes in cardiomyocytes. In 10-month-old TG, cardiomyocyte elongation and hypertrophic remodeling and increased glycolytic flux was accompanied by relatively low expression of FAT/CD36, CPT-1 and PPARα. During the transition phase (12-month-old TG), a pronounced increase in PPARα with an increase in relative fatty acid (FA) flux was associated with anomalies of cardiomyocytes with accumulation of lipid droplets and glycogen as well as cell death. At the stage of overt heart failure (14-month-old TG), an accelerated glycolytic pathway with a decline in FA oxidation was accompanied by further structural changes. 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All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c338t-17c3b0eda5882b6bc76f48e0c57334bf2342e73c32f0ae13903bcba20f789b8a3</citedby><cites>FETCH-LOGICAL-c338t-17c3b0eda5882b6bc76f48e0c57334bf2342e73c32f0ae13903bcba20f789b8a3</cites><orcidid>0000-0002-8934-9748</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1016/j.pharep.2016.03.013$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1016/j.pharep.2016.03.013$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>315,781,785,27926,27927,41490,42559,51321</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/27126697$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Czarnowska, Elżbieta</creatorcontrib><creatorcontrib>Bierła, Joanna B.</creatorcontrib><creatorcontrib>Toczek, Marta</creatorcontrib><creatorcontrib>Tyrankiewicz, Urszula</creatorcontrib><creatorcontrib>Pająk, Beata</creatorcontrib><creatorcontrib>Domal-Kwiatkowska, Dorota</creatorcontrib><creatorcontrib>Ratajska, Anna</creatorcontrib><creatorcontrib>Smoleński, Ryszard T.</creatorcontrib><creatorcontrib>Mende, Ulrike</creatorcontrib><creatorcontrib>Chłopicki, Stefan</creatorcontrib><title>Narrow time window of metabolic changes associated with transition to overt heart failure in Tgaq44 mice</title><title>Pharmacological reports</title><addtitle>Pharmacol. Rep</addtitle><addtitle>Pharmacol Rep</addtitle><description>•Glucolytic flux dominates in adaptive hypertrophy and heart failure end-stage.•Increase in fatty acid metabolism characterize transition to overt heart failure.•A causal relationship between structure damage, overactivation PPARα and FA flux in transition phase is suggestive.•Therapeutic time window for modulation of fatty acid metabolism is relatively narrow. The timing and consequences of alternations in substrate utilization in heart failure (HF) and their relationship with structural changes remain unclear. This study aimed to analyze metabolic changes associated with transition to overt heart failure in transgenic mouse model of HF resulting from cardiac-specific overexpression of constitutively active Gαq*. Structural changes quantified by morphometry, relative cardiac mRNA and protein expression of PPARα, FAT/CD36, CPT-1, GLUT-4 and glycolytic efficiency following administration of 1-13C glucose were investigated in 4–14-month-old Tgαq*44 mice (TG), compared with age-matched FVB wild type mice (WT). Initial hypertrophy in TG (4–10-month of age) was featured by an accelerated glycolytic pathway that was not accompanied by structural changes in cardiomyocytes. In 10-month-old TG, cardiomyocyte elongation and hypertrophic remodeling and increased glycolytic flux was accompanied by relatively low expression of FAT/CD36, CPT-1 and PPARα. During the transition phase (12-month-old TG), a pronounced increase in PPARα with an increase in relative fatty acid (FA) flux was associated with anomalies of cardiomyocytes with accumulation of lipid droplets and glycogen as well as cell death. At the stage of overt heart failure (14-month-old TG), an accelerated glycolytic pathway with a decline in FA oxidation was accompanied by further structural changes. 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Structural changes quantified by morphometry, relative cardiac mRNA and protein expression of PPARα, FAT/CD36, CPT-1, GLUT-4 and glycolytic efficiency following administration of 1-13C glucose were investigated in 4–14-month-old Tgαq*44 mice (TG), compared with age-matched FVB wild type mice (WT). Initial hypertrophy in TG (4–10-month of age) was featured by an accelerated glycolytic pathway that was not accompanied by structural changes in cardiomyocytes. In 10-month-old TG, cardiomyocyte elongation and hypertrophic remodeling and increased glycolytic flux was accompanied by relatively low expression of FAT/CD36, CPT-1 and PPARα. During the transition phase (12-month-old TG), a pronounced increase in PPARα with an increase in relative fatty acid (FA) flux was associated with anomalies of cardiomyocytes with accumulation of lipid droplets and glycogen as well as cell death. At the stage of overt heart failure (14-month-old TG), an accelerated glycolytic pathway with a decline in FA oxidation was accompanied by further structural changes. Tgαq*44 mice display three distinct phases of metabolic/structural changes during hypertrophy and progression to HF, with relatively short period of increase in FA metabolism, highlighting a narrow metabolic changes associated with transition to overt heart failure in Tgaq*44 mice that have therapeutic significance.</abstract><cop>Cham</cop><pub>Elsevier Urban &amp; Partner Sp. z o.o</pub><pmid>27126697</pmid><doi>10.1016/j.pharep.2016.03.013</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0002-8934-9748</orcidid></addata></record>
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source MEDLINE; SpringerLink Journals - AutoHoldings
subjects Age Factors
Animals
Carnitine O-Palmitoyltransferase - biosynthesis
CD36 Antigens - biosynthesis
Cell Death
Drug Safety and Pharmacovigilance
Fatty Acids - biosynthesis
Glucose Transporter Type 4 - biosynthesis
GTP-Binding Protein alpha Subunits, Gq-G11 - genetics
Heart failure
Heart Failure - metabolism
Heart Failure - pathology
Hypertrophy
Hypertrophy - metabolism
Hypertrophy - pathology
Metabolic remodeling
Mice
Mice, Transgenic
Myocardium - metabolism
Myocardium - pathology
Myocytes, Cardiac - metabolism
Myocytes, Cardiac - pathology
Original Research Article
Pharmacotherapy
Pharmacy
PPAR alpha - biosynthesis
PPARα
Structural remodeling
title Narrow time window of metabolic changes associated with transition to overt heart failure in Tgaq44 mice
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