A method for specific removal of large amounts of factor IX:C alloantibodies by a resin to which highly purified factor IX was linked (factor IX CH-Sepharose) is described. Factor IX was isolated from human plasma by a three-step procedure, including barium citrate adsorption and elution, DEAE-Sepharose CL-6B chromatography, and dextran sulfate agarose chromatography. Approximately 100 mg facto...

Electroconvulsive therapy (ECT) is used for medication-resistant and life-threatening mental disorders, and therefore it occupies an important position in psychiatric treatment. ECT reportedly increases intracranial pressure and is suspected of increasing the risk of intracranial hemorrhage, especially in patients with hemorrhagic diseases such as hemophilia. A decrease in or loss of blood coag...

Several enzymes can activate factor VII in vitro, but the protease responsible for generating factor VIIa in vivo has not been determined. Using recombinant tissue factor that has undergone a COOH-terminal truncation, a sensitive functional assay has been established for measuring plasma factor VIIa levels. To evaluate the mechanism responsible for the generation of factor VIIa in vivo, we meas...

Human blood clotting factor IX, and two chimeric molecules of factor IX, in which the first epidermal growth factor-like domain or both epidermal growth factor-like domains have been replaced by that of human factor X, have been expressed in mouse C127 cells. The recombinants have been purified using a metal ion-dependent monoclonal antibody specific for residues 1-42 of human factor IX. All re...

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Human blood clotting factor IX, and two chimeric molecules of factor IX, in which the first epidermal growth factor-like domain or both epidermal growth factor-like domains have been replaced by that of human factor X, have been expressed in mouse Cl27 cells. The recombinants have been purified using a metal ion-dependent monoclonal antibody specific for residues l-42 of human factor IX. All re...

New Zealand Maoris (72 X chromosomes) have been compared with Pacific Island Polynesians (121 X chromosomes) and Caucasian New Zealanders (51 X chromosomes) as a control group to determine the allelic frequency of six RFLPs associated with the genes for two X linked diseases (haemophilia A and haemophilia B). RFLPs examined were BclI, XbaI, and BglI within the factor VIII gene, the factor VIII ...

is a congenital, often familial, hemorrhagic disorder which was distinguished from classical hemophilia (AHG deficiency, factor VIII deficiency, hemophilia A) in 1952.13 Like the latter, it is usually inherited as a sex-linked recessive trait: only the male hemizygote for the abnormal gene is clinically affected, and the female heterozygote or carrier is asymptomatic. From a eugenic standpoint ...