| 1. |
- Holmberg, Lars, et al.
(författare)
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Measurement of antihaemophilic factor A antigen (VII:CAg) with a solid phase immunoradiometric method based on homologous non-haemophilic antibodies.
- 1979
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Ingår i: Scandinavian Journal of Haematology. - 0036-553X. ; 23:1, s. 17-24
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Tidskriftsartikel (refereegranskat)abstract
- Antihaemophilic-factor-A-antibodies, which had spontaneously arisen in 2 patients, were used to develop an immunoradiometric method for measurement of antihaemophilic factor A antigen (VIII:CAg). 13 patients with severe haemophilia A had VIII: CAg below the limit of detection (0.01 U/ml). Patients with moderate and mild haemophilia A either had VIII:CAg roughly equal to factor VIII clotting activity (VIII:C) or a not detectable VIII:CAg, suggesting 2 different molecular mechanisms in moderate and mild haemophilia A. VIII:CAg could be detected in serum but in lower amounts than in plasma. In 2 patients with von Willebrand's disease VIII:CAg equalled VIII:C. The post-transfusional retarded increase of VIII:C in 1 patient with von Willebrand's disease was accompanied by a slight increase in VIII:CAg. Fetal plasma contained measurable amounts of VIII:CAg.
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| 2. |
- Ljung, R, et al.
(författare)
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Fanconi's anaemia associated with haemophilia A
- 1979
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Ingår i: Clinical Genetics. - : Wiley. - 0009-9163 .- 1399-0004. ; 16:5, s. 8-364
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Tidskriftsartikel (refereegranskat)abstract
- Fanconi's anaemia and haemophilia A are born inherited diseases creating haemostatic defects. The association of these two rare diseases in one patient is described. The patient's haemophilia was studied with a newly developed immunological technique determining the plasma antigen associated with Factor VIII activity, and was found to be a genetic variant of moderately severe haemophilia A. It was not possible to demonstrate a common bone marrow defect or a common immunological or genetical background of the two diseases. The double haemostatic defect created, i.e. Factor VIII deficiency and thrombocytopenia, resulted in only a slight increase in bleeding tendency. A favourable result was obtained with corticosteroid and androgenic treatment.
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| 3. |
- Ljung, R., et al.
(författare)
-
Purification of F.VIII:C by antigen-antibody chromatography
- 1978
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Ingår i: Thrombosis Research. - : Elsevier BV. - 0049-3848. ; 12:4, s. 667-675
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Tidskriftsartikel (refereegranskat)abstract
- Purification of F.VIII:C devoid of F.VIII:Ag was achieved by antigen-antibody chromatography. The antibody used neutralized VIIIR:Ag but not VIII:C in liquid phase but extracted both VIII:Ag and VIII:C from plasma when bound to Sepharose. VIII:C was eluted with calcium-containing buffer. When plasma was used as starting material VIII:C was obtained free from VIIIR:Ag but contaminated with some other proteins. When a well-defined pure F.VIII preparation was used as starting material the VIII:C active fractions contained no immunoradiometrically detectable VIIIR:Ag, no VIIIR:RCF and no detectable protein. When stabilized with albumin VIII:C could be frozen and thawed with retained activity and could be activated with thrombin.
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