atherogene

An atherogene is a factor, agent, or process that promotes atherogenesis, the formation and progression of atherosclerotic plaques in the arterial wall. The term derives from Greek athereo- (fatty) and -genēs (producing). In common usage, “atherogenic” describes properties or agents that increase the risk of atherosclerosis; “atherogene” is a less common noun form sometimes used to refer to such agents or processes.

Role and examples: Atherogenic factors include elevated low-density lipoprotein (LDL) cholesterol, small dense LDL particles, oxidized LDL, lipoprotein(a), high triglycerides, low HDL, hypertension, insulin resistance or diabetes, smoking, obesity, chronic inflammation, and certain infectious or gut microbiome–related factors. Dietary patterns high in saturated fats, trans fats, and added sugars can contribute. Genetic predispositions, such as familial hypercholesterolemia, also raise atherogenic potential.

Mechanisms: The process involves endothelial dysfunction, lipid deposition in the intima, oxidation of LDL, and uptake by macrophages to form foam cells. This stimulates smooth muscle cell migration, extracellular matrix remodeling, and plaque development. Over time, plaques may progress, become inflamed, and rupture, potentially causing heart attack or stroke.

Clinical relevance and assessment: Atherogenicity is inferred from lipid profiles (LDL-C, non-HDL cholesterol, apolipoprotein B) and other risk markers. Risk scores and imaging methods help quantify cardiovascular risk. In research, atherogenicity is studied via in vitro assays, animal models, and molecular investigations of factors like oxidized LDL and lipoprotein(a).

Terminology: The term atherogene is not standardized; the more common term is atherogenic factor or atherogenesis. Nevertheless, it is used in some texts to denote agents or processes that promote arterial plaque formation.