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Researchers at Chalmers University of Technology identified blood-protein patterns associated with three cholesterol-carrying particles, including TRL and Lp(a), that may help explain heart disease risk beyond LDL cholesterol. The study does not establish a new clinical test or treatment; researchers say further work is needed to determine whether measuring or targeting these processes can improve prevention.
Researchers at Chalmers University of Technology have identified blood-protein patterns associated with fat-carrying particles that may help explain why heart disease risk can remain after LDL cholesterol is lowered. The study, published in the European Heart Journal, points to shared inflammatory and blood-vessel processes linked to TRL and Lp(a), but it did not test a treatment or establish a clinical test.
The researchers examined three types of lipoproteins: LDL, or low-density lipoprotein; TRL, or triglyceride-rich lipoprotein; and Lp(a), or lipoprotein(a). All can carry cholesterol into artery walls. LDL is the most abundant of the three, while TRL and Lp(a) are among the particles researchers are investigating as contributors to risk that persists even when LDL cholesterol reaches a recommended level.
To look for biological clues, the team combined measurements of almost 3,000 blood proteins with genetic data and long-term health records. Proteins perform many functions in the body, and their levels can change with factors including age, diet, stress and disease. The researchers used these patterns to investigate how the particles might affect the body; the findings show associations and potential pathways, not proof that a particular protein causes heart disease.
The analysis found that TRL and Lp(a) shared many protein patterns, including proteins associated with attracting immune cells. The researchers said this could relate to inflammation and changes in blood-vessel structure. LDL’s protein pattern was more strongly associated with cholesterol building up in artery walls. The team’s findings build on earlier research by the same group that identified particle count as a useful predictor of future heart disease risk.
Risk Beyond LDL Cholesterol
Lowering LDL cholesterol substantially reduces heart attack risk and remains a central part of prevention, according to the study’s authors. Yet some people develop coronary heart disease even after treatment lowers their LDL to a recommended level. Understanding other particles and the biological processes associated with them could help explain part of this remaining risk.
The possible practical value is in guiding future prevention research. If later studies confirm that the protein patterns mark processes that can be measured or safely targeted, they could help researchers develop more tailored approaches alongside existing care. For now, the study is a source of biological clues, not evidence that patients should change treatment or that a new intervention will reduce disease.
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How the Study Looked Beyond LDL
Coronary heart disease develops as fatty material accumulates in the blood vessels supplying the heart. High blood cholesterol is a key risk factor, and lowering LDL cholesterol reduces the likelihood of heart attacks. However, LDL is not the only particle that carries fats through the blood, prompting research into whether other lipoproteins help account for risk that remains after LDL is controlled.
The World Health Organization estimates that nearly 17.9 million people die from cardiovascular diseases worldwide each year, with heart attacks and strokes accounting for more than four out of five of those deaths. That global burden provides context for the research, but the Chalmers study itself focused on biological patterns and did not measure whether a new prevention strategy reduced deaths or heart attacks.
“For this study, we wanted to understand what happens beyond the accumulation of cholesterol in artery walls, whether different fat-carrying particles can damage the blood vessels differently and why the remaining risk of heart disease still occurs.”
— Jakub Morze, the study’s lead author and a postdoctoral fellow at Chalmers University of Technology
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Clinical Use Still Unproven
The findings do not show that the identified protein patterns directly cause heart disease, nor do they establish that measuring those patterns can predict an individual’s risk in clinical practice. The study did not test a new treatment, determine whether changing the proteins would prevent heart attacks, or show that a protein test is ready for use.
The source report does not provide enough detail to assess the study’s full participant characteristics, the size of the associations, or how the patterns performed against existing risk assessments. It is also not clear which specific biological processes, if any, could be safely targeted. Those questions require further investigation before the results can support a change in care.
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Testing Paths to Prevention
Wittenbecher said the next step is to determine whether measuring or targeting the processes associated with the protein patterns can improve prevention alongside current treatments. That will require additional research to validate the findings and assess whether the patterns add useful information beyond established risk factors.
Until such evidence is available, the researchers’ findings remain a basis for further study rather than a new clinical recommendation. The authors’ stated position is that lowering LDL remains central to prevention; the potential role of TRL, Lp(a) and their associated pathways is still under investigation.
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Key Questions
What did the study find?
Researchers identified overlapping blood-protein patterns associated with TRL and Lp(a), two fat-carrying particles that may contribute to heart disease risk beyond LDL cholesterol. The patterns may point to shared inflammatory and blood-vessel processes.
Does this mean LDL cholesterol is no longer a concern?
No. The study’s lead researcher said lowering LDL remains a cornerstone of prevention. The research explores possible contributors to risk that can remain after LDL is lowered.
Is there a new blood test or treatment based on these findings?
No. The study did not establish a clinical protein test or test a new treatment. Whether measuring or targeting the identified processes would improve prevention remains to be established.
What are TRL and Lp(a)?
TRL stands for triglyceride-rich lipoprotein, and Lp(a) stands for lipoprotein(a). Both carry fats through the blood and can deposit cholesterol in artery walls.
What research comes next?
The researchers say further work is needed to find out whether measuring or targeting the processes associated with these protein patterns can improve prevention alongside existing care.
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