Lipoprotein(a) at the crossroads of inflammation and atherosclerosis in rheumatoid arthritis: A narrative review.
Rheumatoid arthritis (RA) is a systemic autoimmune disease associated with a markedly increased risk of cardiovascular disease (CVD) that is not fully explained by traditional risk factors. Lipoprotein(a) [Lp(a)], a genetically determined lipoprotein with proatherogenic, prothrombotic, and proinflammatory properties, has emerged as a potential contributor to this excess cardiovascular burden. Growing evidence suggests that Lp(a) may represent a mechanistic link between chronic inflammation, immune dysregulation, and accelerated atherosclerosis in RA.
This narrative review synthesizes evidence from observational studies, mechanistic research, genetic analyses, biomarker investigations, and emerging therapeutic trials examining Lp(a) in RA. Relevant literature was identified through comprehensive searches of major biomedical databases, with emphasis on studies addressing pathophysiology, cardiovascular outcomes, disease activity, and treatment effects on Lp(a).
RA patients frequently exhibit elevated Lp(a) levels, particularly in the presence of active systemic inflammation. Lp(a) contributes to vascular injury through enhanced arterial wall retention, carriage of oxidized phospholipids, endothelial activation, and impaired fibrinolysis. Clinical studies associate elevated Lp(a) with subclinical atherosclerosis, arterial stiffness, and increased cardiovascular events in RA, independent of conventional lipid parameters. Inflammatory cytokines, particularly interleukin-6 (IL-6), appear to modulate Lp(a) metabolism, providing a biological rationale for the Lp(a)-lowering effects observed with IL-6 receptor blockade. Advances in standardized assays, genetic insights into LPA polymorphisms, and novel RNA-based therapies have revitalized interest in Lp(a) as both a biomarker and therapeutic target in RA.
Lp(a) occupies a critical intersection between inflammation and atherosclerosis in RA. Incorporating Lp(a) into cardiovascular risk stratification and exploring targeted therapies may enable more precise, integrated management of cardiovascular risk in RA patients, warranting dedicated prospective studies.
This narrative review synthesizes evidence from observational studies, mechanistic research, genetic analyses, biomarker investigations, and emerging therapeutic trials examining Lp(a) in RA. Relevant literature was identified through comprehensive searches of major biomedical databases, with emphasis on studies addressing pathophysiology, cardiovascular outcomes, disease activity, and treatment effects on Lp(a).
RA patients frequently exhibit elevated Lp(a) levels, particularly in the presence of active systemic inflammation. Lp(a) contributes to vascular injury through enhanced arterial wall retention, carriage of oxidized phospholipids, endothelial activation, and impaired fibrinolysis. Clinical studies associate elevated Lp(a) with subclinical atherosclerosis, arterial stiffness, and increased cardiovascular events in RA, independent of conventional lipid parameters. Inflammatory cytokines, particularly interleukin-6 (IL-6), appear to modulate Lp(a) metabolism, providing a biological rationale for the Lp(a)-lowering effects observed with IL-6 receptor blockade. Advances in standardized assays, genetic insights into LPA polymorphisms, and novel RNA-based therapies have revitalized interest in Lp(a) as both a biomarker and therapeutic target in RA.
Lp(a) occupies a critical intersection between inflammation and atherosclerosis in RA. Incorporating Lp(a) into cardiovascular risk stratification and exploring targeted therapies may enable more precise, integrated management of cardiovascular risk in RA patients, warranting dedicated prospective studies.