Presumed Mechanisms Underlying Lipoprotein(a)-caused Atherosclerosis.

Lipoprotein(a) (Lp(a)) is increasingly recognised as an independent and causal risk factor for atherosclerotic cardiovascular disease. Although the underlying mechanisms remain incompletely defined, evidence supports a multifactorial role for Lp(a) in atherogenesis. Lp(a) contributes to endothelial dysfunction, promotes vascular inflammation and enhances lipid retention and oxidation within the arterial wall. These changes drive foam cell formation and smooth muscle cell activation, hallmarks of early plaque development. In addition, Lp(a) exerts prothrombotic effects through structural homology with plasminogen, interfering with fibrinolysis and promoting thrombosis, which may increase the risk of plaque rupture and acute events. Collectively, these overlapping mechanisms underscore the unique contribution of Lp(a) to both the development and progression of atherosclerosis. As novel targeting therapies emerge, a deeper understanding of Lp(a) biology will be essential for translating these insights into clinical benefit.