RGD Reference Report - The F8(-/-) rat as a model of hemophilic arthropathy. - Rat Genome Database

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The F8(-/-) rat as a model of hemophilic arthropathy.

Authors: Sørensen, K R  Roepstorff, K  Wiinberg, B  Hansen, A K  Tranholm, M  Nielsen, L N  Kjelgaard-Hansen, M 
Citation: Sørensen KR, etal., J Thromb Haemost. 2016 Jun;14(6):1216-25. doi: 10.1111/jth.13328. Epub 2016 May 10.
RGD ID: 150520059
Pubmed: PMID:27060449   (View Abstract at PubMed)
DOI: DOI:10.1111/jth.13328   (Journal Full-text)

UNLABELLED: Essentials Validating the F8 rat as a new intermediate-size animal model of hemophilic arthropathy. Factor VIII (FVIII) treated F8(-/-) rats suffered induced hemarthrosis analyzed by histopathology. F8 (-/-) animals develop hemophilic arthropathy upon hemarthrosis, preventable by FVIII treatment. The F8 (-/-) rat presents as a new pharmacologic model of hemophilic arthropathy.
SUMMARY: Background Translational animal models of hemophilia are valuable for determining the pathobiology of the disease and its co-morbidities (e.g. hemophilic arthropathy, HA). The biologic mechanisms behind the development of HA, a painful and debilitating condition, are not completely understood. We recently characterized a F8(-/-) rat, which could be a new preclinical model of HA. Objectives To establish the F8(-/-) rat as a model of HA by determining if the F8(-/-) rat develops HA resembling human HA after an induced joint bleed and whether a second joint bleed causes further disease progression. Methods Wild-type and F8(-/-) rats were treated with vehicle or recombinant human factor VIII (rhFVIII) prior to a needle-induced joint bleed. Joint swelling was measured prior to injury, the following 7 days and upon euthanasia. Histologic sections of the joint were stained, and athropathic changes identified and scored with regard to synovitis, bone remodelling, cartilage degradation and hemosiderin deposition. Results Vehicle-treated F8(-/-) rats experienced marked joint swelling and developed chronic degenerative joint changes (i.e. fibrosis of the subsynovial membrane, chondrocyte loss and excessive bone remodeling). Treatment with rhFVIII reduced or prevented swelling and degenerative joint changes, returning the F8(-/-) animals to a wild-type phenotype. Conclusion The hemophilic phenotype of the F8(-/-) rat resulted in a persistent hemarthrosis following an induced joint bleed. This caused development of HA resembling human HA, which was prevented by rhFVIII treatment, confirming the potential of the F8(-/-) rat as a model of HA.

Disease Annotations    

Phenotype Annotations    

Mammalian Phenotype
Objects Annotated

Genes (Rattus norvegicus)
F8  (coagulation factor VIII)
F8em1Sage  (coagulation factor VIII, procoagulant component; zinc finger nuclease induced mutant1, Sage)

Genes (Mus musculus)
F8  (coagulation factor VIII)

Genes (Homo sapiens)
F8  (coagulation factor VIII)

SD-F8em1Sage-/-/Novo  (NA)

Additional Information