Hypertriglyceridemia and cardiovascular risk: a cautionary note about metabolic confounding

Area of Science:

• Cardiovascular Medicine
• Lipid Metabolism
• Biochemistry

Background:

• Triglycerides and LDL cholesterol (LDL-C) are conventional markers for VLDL and LDL particles, respectively.
• Epidemiological and genetic studies suggest triglycerides are an independent risk factor for cardiovascular disease.
• Novel therapies targeting triglyceride reduction are emerging based on the triglyceride hypothesis.

Purpose of the Study:

• To examine the validity of the triglyceride hypothesis in cardiovascular risk.
• To detail the biological complexities of hypertriglyceridemia.
• To assess the adequacy of current lipoprotein measurement methods.

Main Methods:

• Review of epidemiological studies and genetic analyses.
• Examination of evidence from fibrate randomized clinical trials.
• Analysis of novel mutations and triglyceride-lowering therapies.
• Evaluation of metabolic links between VLDL and LDL.

Main Results:

• Cardiovascular risk is associated with triglycerides independently of LDL-C.
• Measuring only triglycerides and LDL-C may be insufficient for a complete lipoprotein profile.
• Apolipoprotein B (apoB) measurement is crucial for accurate lipoprotein assessment.

Conclusions:

• The triglyceride hypothesis is supported by substantial evidence.
• Current lipid measurement standards may underestimate cardiovascular risk.
• Apolipoprotein B measurement should be integrated for comprehensive lipoprotein profiling.