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Dysregulation of cardiac lipid parameters in high-fat high-cholesterol diet-induced rat model

Qian Han1,2, Sze C Yeung2, Mary S M Ip2,3

  • 1Department of Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Institute of Respiratory Health, State Key Laboratory of Respiratory Disease, Guangzhou, China.

Lipids in Health and Disease
|November 16, 2018
PubMed

Insights

A high-fat, high-cholesterol diet causes systemic and cardiac lipid dysregulation, oxidative stress, and inflammation, leading to heart damage. Maintaining lipid regulation is crucial for preventing heart injury.

Area of Science:

  • Cardiovascular Science
  • Metabolic Research
  • Toxicology

Background:

  • Lipid dysregulation is a known cardiovascular disease (CVD) risk factor, but direct links to cardiac damage are less understood.
  • Emerging evidence connects dyslipidemia with pro-inflammatory responses, exacerbating CVD risk.
  • This study investigates cardiac lipid metabolism's role in diet-induced heart injury.

Purpose of the Study:

  • To determine if a high-fat, high-cholesterol (HFHC) diet causes heart damage via hyperlipidemia.
  • To explore the role of cardiac lipid dysregulation in cellular injury.

Main Methods:

  • Male Sprague-Dawley rats were fed a normal or HFHC diet for 2 or 4 weeks.
  • Serum lipid parameters, lipid peroxidation markers, and cardiac lipid profiles were analyzed.
  • Cardiac damage was assessed through fibrosis, troponin I levels, and circulating heart fatty acid-binding protein (H-FABP).

Main Results:

  • HFHC diet elevated serum cholesterol, free fatty acids (FFAs), and induced systemic oxidative stress and inflammation.
  • Cardiac lipid dysregulation, marked by increased cholesterol and fatty acid-binding proteins (FABPs), was observed after 4 weeks.
  • Elevated circulating H-FABP, cardiac fibrosis, and troponin I loss indicated significant heart damage.

Conclusions:

  • HFHC diet induces systemic and cardiac lipid dysregulation, oxidative stress, and inflammation, contributing to heart tissue pathology.
  • These factors likely interact to cause cardiac damage.
  • Maintaining lipid regulation is essential for preventing diet-induced heart damage.
Abstract

Keywords:
Heart damageHyperlipidemiaInflammationLipidOxidative stress

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