Long-term objectives: To maintain inbred colonies of bleeder animals (von Willebrand disease dogs; hemophilia A and B dogs) as animal models of the corresponding human diseases; to study the genetics and pathophysiology of these diseases in animals and extend the studies as appropriate to the human counterpart; to characterize and utilize in diagnostic and physiologic studies Bothrops and Bitis venom factors that interact with the Factor VIII complex and blood platelets; to fractionate the plasma factor VIII complex and determine the comparative effectiveness of different fractions in correcting the several defects in the inherited bleeder disorders.
The specific aims of this proposal are a) to maintain and make available the inbred bleeder animals for study; b) to study the effect of various gene dosages of the vWF and hemophilia A genes on the manifestation of disease and their effect on the response to transfusions; c) to develop and study animal models of acquired bleeder disorders due to abnormalities in the factor VIII complex as von Willebrand syndrome or from the effects of the Bothrops or Bitis factors; and d) to investigate platelet aggregation and platelet adhesion as influenced by the factor VIII complex, the venom factors, and other variables. The methodologies for animal breeding will entail careful diagnosis as to phenotype of parent and offspring in relation the several markers of the factor VIII complet. Transfusion studies will entail plasma fractionation by standard technics (cryoprecipitation, salt precipitation, polyethylene glycol, etc.). Changes in the VIII markers (VIII:C, VIIIR:Ag, BT, etc) will be followed in the infused animals. Standard chromatographic, immunologic, and clotting and platelet bioassays will be used throughout.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Research Project (R01)
Project #
5R01HL001648-39
Application #
3334095
Study Section
Hematology Subcommittee 2 (HEM)
Project Start
1974-10-01
Project End
1989-11-30
Budget Start
1985-12-01
Budget End
1986-11-30
Support Year
39
Fiscal Year
1986
Total Cost
Indirect Cost
Name
University of North Carolina Chapel Hill
Department
Type
Schools of Medicine
DUNS #
078861598
City
Chapel Hill
State
NC
Country
United States
Zip Code
27599
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Lozier, J N; Brinkhous, K M (1994) Gene therapy and the hemophilias. JAMA 271:47-51
Kay, M A; Rothenberg, S; Landen, C N et al. (1993) In vivo gene therapy of hemophilia B: sustained partial correction in factor IX-deficient dogs. Science 262:117-9
Nichols, T C; Bellinger, D A; Reddick, R L et al. (1993) The roles of von Willebrand factor and factor VIII in arterial thrombosis: studies in canine von Willebrand disease and hemophilia A. Blood 81:2644-51
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Nichols, T C; Bellinger, D A; Reddick, R L et al. (1991) Role of von Willebrand factor in arterial thrombosis. Studies in normal and von Willebrand disease pigs. Circulation 83:IV56-64
Eaton Jr, L A; Read, M S; Brinkhous, K M (1991) Glycoprotein Ib bioassays. Activity levels in Bernard-Soulier syndrome and in stored blood bank platelets. Arch Pathol Lab Med 115:488-93
Brinkhous, K M; Reddick, R L; Read, M S et al. (1991) von Willebrand factor and animal models: contributions to gene therapy, thrombotic thrombocytopenic purpura, and coronary artery thrombosis. Mayo Clin Proc 66:733-42
Nichols, T C; Bellinger, D A; Tate, D A et al. (1990) von Willebrand factor and occlusive arterial thrombosis. A study in normal and von Willebrand's disease pigs with diet-induced hypercholesterolemia and atherosclerosis. Arteriosclerosis 10:449-61
Axelrod, J H; Read, M S; Brinkhous, K M et al. (1990) Phenotypic correction of factor IX deficiency in skin fibroblasts of hemophilic dogs. Proc Natl Acad Sci U S A 87:5173-7

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