Nonorgan specific autoantibodies and heart damage

Abstract

Heart damage, mediated by different autoantibodies can involve several anatomical heart structures: valves, arteries, conduction tissue. Verrucous endocarditis is frequently reported in patients with antiphospholipid syndrome (APS) with or without systemic lupus erythematosus (SLE), particularly if they suffer from central nervous system involvement. Antiphospholipid antibodies (aPL) were shown deposited at subendothelial level of the affected valves. According to several in vitro and in vivo experimental models, aPL, anti-oxidized LDL (oxLDL), anti-heat shock protein 65 (HSP65) and anti-endothelial cells antibodies (AECA) seem to be involved in the pathogenesis of the atherosclerosis phenomena described in systemic autoimmune disease and vasculitis. However, the observation of the association of the same antibodies with clinical and subclinical atherosclerosis in patients is still controversial. The children of anti-Ro/SSA positive mothers can be affected by the congenital heart block. Anti Ro/SS-A antibodies play a major pathogenic role in affecting the heart conduction tissue in this rare condition.