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  • Title: Dysfibrinogenemia and lupus anticoagulant in a patient with recurrent thrombosis.
    Author: Al-Mondhiry H, Galanakis D.
    Journal: J Lab Clin Med; 1987 Dec; 110(6):726-33. PubMed ID: 3119749.
    Abstract:
    We describe the coagulopathy of a 65-year-old woman with a thrombotic disorder associated with dysfibrinogenemia and lupus anticoagulant (LA). The patient's prothrombin time (PT), partial thromboplastin time (PTT), thrombin time (TT), and batroxobin time were prolonged and could not be corrected by mixing with equal volumes of normal plasma. Fibrinogen quantitation showed approximately twice as much immunoreactive as thrombin-clottable protein. The batroxobin and thrombin clotting times of the patient's isolated fibrinogen were prolonged and could not be corrected by mixture with normal fibrinogen. Turbidimetrically assessed fibrin monomer aggregation in response to thrombin, ancrod, or batroxobin and fibrin monomer reaggregation experiments disclosed clearly delayed onset and a lower maximum opacity. In other turbidimetric and clotting-time experiments, the patient's fibrinogen displayed a dose-dependent inhibition of the reaggregation of normal fibrin. Fibrinopeptide A and B release rates and sialic acid content were normal. Assessed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) of reduced samples, the subunit structure of the patient's fibrinogen and its fully cross-linked fibrin was normal. The presence of LA was established by two techniques, the blood thromboplastin inhibition test and the platelet neutralization procedure (PNP). A positive PNP could not be produced by mixing afibrinogenemic plasma with the patient's purified fibrinogen. The patient's inactivated serum and her isolated IgG prolonged the PT and PTT of normal plasma but showed no inhibitory effect on the clotting of purified normal fibrinogen.(ABSTRACT TRUNCATED AT 250 WORDS)
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