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Atherosclerosis III: Management01:26

Atherosclerosis III: Management

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Management of atherosclerosis involves an integrated strategy encompassing pharmacological treatment, surgical interventions, lifestyle changes, and nutrition therapy to address the multifactorial nature of the disease.Pharmacological TherapyA cornerstone of atherosclerosis management is the use of pharmacological agents. Statins, such as atorvastatin, are pivotal in inhibiting HMG-CoA reductase, an enzyme that catalyzes an initial step in cholesterol synthesis in the liver. This reduction in...
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10,12-Conjugated linoleic acid supplementation improves HDL composition and function in mice.

Tomas Vaisar1, Shari Wang1, Mohamed Omer1

  • 1University of Washington, Department of Medicine, Division of Metabolism, Endocrinology, and Nutrition, Seattle, WA, USA; University of Washington, Diabetes Institute, Seattle, WA, USA.

Journal of Lipid Research
|June 17, 2022
PubMed
Summary

Conjugated linoleic acid (CLA) may protect against atherosclerosis by improving HDL function and cholesterol efflux. This dietary component shows potential for managing cardiovascular disease risk factors associated with obesity.

Keywords:
Abca1HDL particle concentrationHDL particle sizeHDL proteomicsalpha-1-antitrypsincholesterol transportersfast-phase liquid chromatographyscavenger receptor class B member 1serum amyloid Aweight loss

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Area of Science:

  • Cardiovascular Science
  • Nutritional Science
  • Metabolic Disease Research

Background:

  • Obesity is linked to inflammation, insulin resistance, and type 2 diabetes, increasing cardiovascular disease (CVD) risk.
  • 10,12-conjugated linoleic acid (10,12 CLA), a dietary component, promotes weight loss and may have atheroprotective effects.
  • The precise mechanism by which 10,12 CLA exerts atheroprotection, independent of weight loss, remains unclear.

Purpose of the Study:

  • To investigate the impact of 10,12 CLA on high-density lipoprotein (HDL) composition and function in obese mice.
  • To compare the effects of 10,12 CLA with caloric restriction (CR) and a high-fat, high-sucrose diet on HDL.
  • To elucidate the atheroprotective mechanisms of 10,12 CLA related to HDL functionality and cholesterol metabolism.

Main Methods:

  • Obese LDL receptor-deficient (Ldlr-/-) mice were supplemented with 10,12 CLA, subjected to caloric restriction (CR), or fed a high-fat, high-sucrose diet.
  • HDL composition, particle concentration (HDL-P), and function (cholesterol efflux, anti-inflammatory effects) were evaluated.
  • Expression of HDL receptors and cholesterol transporters in macrophages and aortic tissue was assessed; proteomics analysis of HDL was performed.

Main Results:

  • 10,12 CLA-modified HDL exhibited enhanced anti-inflammatory effects compared to HDL from CR or high-fat/high-sucrose diet groups.
  • Mice receiving 10,12 CLA showed increased HDL-P concentration, particularly larger HDL particles, and elevated passive cholesterol efflux capacity.
  • 10,12 CLA treatment increased HDL receptor scavenger receptor class B type 1 expression and macrophage cholesterol transporter expression (Abca1, Abcg1); HDL particles were enriched with Apoa1 and alpha-1-antitrypsin.

Conclusions:

  • 10,12 CLA enhances HDL's anti-inflammatory potential and cholesterol efflux capacity.
  • Increased HDL particle concentration and beneficial modifications to HDL composition contribute to 10,12 CLA's atheroprotective effects.
  • Dietary 10,12 CLA shows promise in mitigating atherosclerosis through improved HDL functionality and cholesterol homeostasis.