Measurement of β2‐glycoprotein i (apolipoprotein h)‐independent anticardiolipin antibody in human immunodeficiency virus‐1‐positive and‐negative hemophiliacs

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Abstract
The authors studied whether or not anticardiolipin antibody (aCL), which is frequently detected in hemophiliacs with human immunodeficiency virus-1 (HIV-1) infection, is dependent on β2-glycoprotein I (GPI), a cofactor of cardiolipin (CL). GPI-independent aCL was positive in 27 of 36 hemophiliacs with HIV-1 antibody (75%) and in 23 of 29 patients without HIV-1 antibody (79%). However, only six HIV-1-positive and four HIV-1-negative patients were positive for GPI-dependent aCL. Thus the aCL in these hemophiliacs was GPI independent and therefore different from the aCL found in autoimmune diseases, such as systemic lupus erythematosus.
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