Immune signatures may flag heart disease early

Atherosclerosis is the gradual build-up of fatty plaques in artery walls. These plaques form partly because immune cells called macrophages become overwhelmed. Recruited to clear excess cholesterol from vessel walls, they instead become damaged and intensify local inflammation. What macrophages do depends heavily on the broader state of the immune system, which varies considerably between individuals.

The researchers show that specific immune cell configurations in the blood correlate with a higher near-term risk of developing atherosclerosis. These are measurable patterns in immune cell composition, distinct from standard risk factors such as weight or blood pressure. The patterns are more common in people with chronic inflammation, metabolic dysfunction, or obesity, but are not limited to those groups.

Macrophages at the centre

The mechanism centres on macrophages operating inside vessel walls. An atherosclerotic plaque is essentially a graveyard of overloaded macrophages, surrounded by lipid debris and inflammatory signals. Macrophage behaviour is strongly shaped by T cells and other immune compartments. Individuals with certain immune profiles may be at higher risk that macrophages become overwhelmed quickly.

The case for early detection

Current treatment focuses largely on reducing LDL cholesterol, which provides only modest mortality benefit for most patients and does little to reverse existing plaques. Immune profiling as an early marker could shift the focus: intervening before damage is visible, and targeting the right individuals. That aligns with a longevity-oriented approach to prevention. The researchers are cautious, however: these are correlations, not proven causal relationships, and clinical applications require further study.

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