Anti-beta 2 glycoprotein I antibodies in centenarians

Experimental Gerontology
P L MeroniClaudio Franceschi

Abstract

Non-organ-specific autoantibodies are present in centenarians without evidence of autoimmune diseases but conflicting or no data on anti-phospholipid and anti-phospholipid binding proteins were reported. To investigate the presence and antigen specificity of anti-phospholipid and anti-phospholipid binding proteins in centenarians. Seventy-seven centenarians, 70 adult controls, 65 unselected elderly subjects, and 38 old SENIEUR volunteers were investigated. Anti-cardiolipin, anti-human beta 2 glycoprotein I, and lupus anticoagulant were detected. Antigen specificity was assayed against plates coated with anionic, neutral and cationic phospholipids and beta 2 glycoprotein I-dependence was also evaluated. 54.3% of the centenarians were positive for IgG and 8.6% for IgM anti-beta 2 glycoprotein I antibodies, while only 20.7% centenarians were positive for anti-cardiolipin IgG and 2.59% for IgM; none resulted positive for lupus anticoagulant. Anti-cardiolipin positive sera cross-reacted with negatively charged phospholipids and displayed decreased binding to serum-free cardiolipin-coated plates that was restored by human beta 2 glycoprotein I or fetal calf serum. Centenarians display high reactivity against human beta 2 glycoprotein...Continue Reading

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Related Concepts

Senility
Antigenic Specificity
Autoantibodies
Diphosphatidylglycerols
Neoglycoproteins
Polyglobin
IgM2
Lupus Coagulation Inhibitor
Beta 2-Glycoprotein I

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