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  • Title: Phosphatidyl serine-dependent antiprothrombin antibody is exclusive to patients with lupus anticoagulant.
    Author: Matsuda J, Saitoh N, Gotoh M, Kawasugi K, Gohchi K, Tsukamoto M.
    Journal: Br J Rheumatol; 1996 Jun; 35(6):589-91. PubMed ID: 8670583.
    Abstract:
    We conducted this study to determine whether antiprothrombin antibody (aPT) [to prothrombin (PT) alone or PT/phosphatidyl serine (PS) complex] actually existed in patients with lupus anticoagulant (LA) and/or anticardiolipin antibody (aCL). aPT to PT alone was positive in 2/7 LA-positive (29%) and 3/7 LA/aCL-positive (43%) patients. aPT to PT/PS complex was positive in 4/7 LA-positive (57%) and 4/7 LA/aCL-positive (57%) patients in the presence of Ca2+. However, none of the aCL-positive patients without LA or the LA/aCL-negative patients were positive for aPT and aPT/PS. Thus, we confirmed the existence of aPT and aPT/PS specifically among LA-positive patients. However, the clinicopathological significance of aPT and aPT/PS in this clinical setting is yet to be clarified.
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