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Hemophilia B is an X-linked recessive bleeding disorder caused by abnormalities in the coagulation factor IX gene. Without prophylactic treatment, patients experience frequent spontaneous bleeding episodes. Well-characterized animal models are valuable for determining the pathobiology of the disease and testing novel therapeutic innovations. Here, we generated a porcine model of hemophilia B using a combination of CRISPR/Cas9 and somatic cell nuclear transfer. Moreover, we tested the possibility of hemophilia B therapy by gene insertion. Frequent spontaneous joint bleeding episodes that occurred in hemophilia B pigs allowed a thorough investigation of the pathological process of hemophilic arthropathy. In contrast to the hemophilia B pigs, which showed a severe bleeding tendency and joint damage, the transgenic pigs carrying human coagulation factor IX exhibited a partial improvement of bleeding. In summary, this study not only offers a translational hemophilia B model for exploring the pathological process of hemophilic arthropathy but also provides a possibility for the permanent correction of hemophilia in the future by genome editing in situ.


Jiahuan Chen, Beiying An, Biao Yu, Xiaohuan Peng, Hongming Yuan, Qiangbing Yang, Xue Chen, Tingting Yu, Lingyu Wang, Xinwei Zhang, He Wang, Xiaodong Zou, Daxin Pang, Hongsheng Ouyang, Xiaochun Tang. CRISPR/Cas9-mediated knockin of human factor IX into swine factor IX locus effectively alleviates bleeding in hemophilia B pigs. Haematologica. 2021 Mar 01;106(3):829-837

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PMID: 31974191

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