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Published on: January 7, 2019
Non-HDL-cholesterol and apolipoprotein B compared with LDL-cholesterol in atherosclerotic cardiovascular disease risk
Stuart S Carr1, Amanda J Hooper2, David R Sullivan3
1School of Medicine, Faculty of Health and Medical Sciences, University of Western Australia, Perth, WA, Australia.
Insights
Non-high-density lipoprotein (HDL)-cholesterol and apolipoprotein B (apoB) better predict atherosclerotic cardiovascular disease (ASCVD) risk than low-density lipoprotein (LDL)-cholesterol, especially in non-fasting or hypertriglyceridemic individuals. These markers offer superior assessment of atherogenic lipoprotein burden.
Area of Science:
- Cardiovascular Medicine
- Lipidology
- Clinical Chemistry
Background:
- Low-density lipoprotein (LDL) cholesterol is a primary target for atherosclerotic cardiovascular disease (ASCVD) risk assessment.
- Traditional fasting lipid profiles and the Friedewald equation for estimating LDL cholesterol have limitations, including issues with non-fasting samples and hypertriglyceridemia.
- Direct LDL cholesterol measurements lack standardization, and non-high-density lipoprotein (HDL) cholesterol calculations can be affected by HDL measurement variability.
Purpose of the Study:
- To compare the utility of non-high-density lipoprotein (HDL)-cholesterol and apolipoprotein B (apoB) against low-density lipoprotein (LDL)-cholesterol for atherosclerotic cardiovascular disease (ASCVD) risk assessment.
- To review the measurement, role, and current status of non-HDL-cholesterol and apoB in clinical practice.
- To highlight the advantages of non-HDL-cholesterol and apoB in specific patient populations and sample conditions.
Main Methods:
- Review of existing literature on lipid measurement techniques and their association with ASCVD risk.
- Comparison of LDL-cholesterol, non-HDL-cholesterol, and apoB in terms of accuracy and clinical utility.
- Evaluation of performance in various clinical scenarios, including non-fasting samples, hypertriglyceridemia, and very low LDL-cholesterol levels.
Main Results:
- Non-HDL-cholesterol and apoB are more accurate than LDL-cholesterol in hypertriglyceridemic individuals, non-fasting samples, and those with very-low LDL-cholesterol.
- Apolipoprotein B (apoB) methods are standardized and measure atherogenic lipoprotein particle number.
- Accumulating evidence indicates non-HDL-cholesterol and apoB are superior to LDL-cholesterol in predicting ASCVD risk.
Conclusions:
- Non-HDL-cholesterol and apoB demonstrate superior performance over LDL-cholesterol in predicting ASCVD risk, particularly in challenging clinical scenarios.
- Both non-HDL-cholesterol and apoB are increasingly recognized as valuable secondary targets in ASCVD prevention guidelines.
- Further adoption of non-HDL-cholesterol and apoB can enhance the accuracy of cardiovascular risk assessment.
Abstract:
Low density lipoprotein (LDL) is the predominant atherogenic lipoprotein particle in the circulation. Conventionally, a fasting lipid profile has been used for atherosclerotic cardiovascular disease (ASCVD) risk assessment. A non-fasting sample is now regarded as a suitable alternative to a fasting sample. In routine clinical practice, the Friedewald equation is used to estimate LDL-cholesterol, but it has limitations. Commercially available direct measures of LDL-cholesterol are not standardised. LDL-cholesterol is a well-established risk factor for ASCVD, being the primary therapeutic target in both primary and secondary prevention. Non-high-density lipoprotein (HDL)-cholesterol is a measure of the cholesterol content in the atherogenic lipoproteins, but it does not reflect the particle number. Non-HDL-cholesterol has the advantage over LDL-cholesterol of including remnant cholesterol and being independent of triglyceride variability, but it is compromised by the non-specificity bias of direct HDL-cholesterol methods used in the calculation. Apolipoprotein (apo) B, the major structural protein in very low-density lipoprotein, intermediate density lipoprotein, LDL and lipoprotein (a), is a measure of the number of atherogenic lipoproteins. ApoB methods are standardised, but the assay comes at an additional, albeit relatively low cost. Non-HDL-cholesterol and apoB are more accurate measures than LDL-cholesterol in hypertriglyceridaemic individuals, non-fasting samples, and in those with very-low LDL-cholesterol concentrations. Accumulating evidence suggests that non-HDL-cholesterol and apoB are superior to LDL-cholesterol in predicting ASCVD risk, and both have been designated as secondary targets in some treatment guidelines. We review the measurement, potential role, utility and current status of non-HDL-cholesterol and apoB when compared with LDL-cholesterol in ASCVD risk assessment.
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