The Impact of Cardiac Lipotoxicity on Cardiac Function and Mirnas Signature in Obese and Non-Obese Rats with Myocardial Infarction.

Abstract:

:Cardiac lipotoxicity is involved in the cardiac functional consequences associated with obesity. Therefore, the aim of this study was to explore whether changes in the mitochondrial lipid cardiac profile could reflect differences in cardiac function and structure in obese and non-obese rats with myocardial infarction (MI). Whether these changes can also be reflected in a specific plasma miRNA signature as markers of cardiac damage was also evaluated. Rats were fed with either standard (3.5% fat) or high fat diet (35% fat) for 6 weeks before the induction of MI and sacrificed 4 weeks later. MI showed cardiac lipotoxicity independently of the presence of obesity, although obese and non-obese rats did not present the same cardiac lipid profile at mitochondrial level. Several cardiac lipid species in mitochondria, including cardiolipins and triglycerides, were associated with myocardial fibrosis, with mitochondrial triglyceride levels being independently associated with it; this supports that lipotoxicity can affect cardiac function. MI down-regulated plasma levels of miRNA 15b-5p and 194-5p in obese and non-obese animals, which were associated with cardiac function, mitochondrial lipids and myocardial fibrosis, with miRNA 15b-5p levels being independently associated with cardiac fibrosis. This could support that lipotoxicity could affect heart function by modulating plasma miRNAs.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Marín-Royo G,Ortega-Hernández A,Martínez-Martínez E,Jurado-López R,Luaces M,Islas F,Gómez-Garre D,Delgado-Valero B,Lagunas E,Ramchandani B,García-Bouza M,Nieto ML,Cachofeiro V

doi

10.1038/s41598-018-36914-y

subject

Has Abstract

pub_date

2019-01-24 00:00:00

pages

444

issue

1

issn

2045-2322

pii

10.1038/s41598-018-36914-y

journal_volume

9

pub_type

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