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    • 2. 发明授权
    • Transgenic mammal secreting B-domain deleted human FVII in its milk
    • 转基因哺乳动物在其牛奶中分泌B结构域缺失的人FVII
    • US07667089B2
    • 2010-02-23
    • US10820777
    • 2004-04-09
    • Winston T. K. ChengChuan-Mu ChenShwu-Wha LinChih-Hong WangChih-Jen LinShinn-Chih Wu
    • Winston T. K. ChengChuan-Mu ChenShwu-Wha LinChih-Hong WangChih-Jen LinShinn-Chih Wu
    • C12P21/00A01K67/027C12N15/00
    • C12N15/8509A01K67/0275A01K2217/05A01K2267/01C07K14/755C12N2830/008
    • Hemophilia A is one of the major inherited bleeding disorders caused by a deficiency or abnormality in coagulation factor VIII (FVIII). Hemophiliacs have been treated with whole plasma or purified FVIII concentrates. The risk of transmitting blood-borne viruses and the cost of highly purified FVIII are the major factors that restrict prophylaxis in hemophilia therapy. One of the challenges created by the biotechnology revolution is the development of methods for the economical production of highly purified proteins in large scales. The present invention provides improved mammary expression cassettes useful for the expression of genes at high levels in the milk of transgenic animals. In particular, the present invention provides recombinant signal peptide sequences derived from a-lactalbumin and aS1-casein milk genes suitable for leading protein secretion in the mammary gland. These gene cassettes are capable of delivering different transgenic constructs which result in the production of full-length or B domain-deleted therapeutic levels of biologically active human FVIII in the transgenic animals in vivo. Within the scope of the invention are also method for producing the transgenic non-human mammal, such as mouse, rat, rabbit, goat, sheep, pig and bovine species, capable of expressing human FVIII, and methods of making milk and methods of identifying protein from the transgenic milk.
    • 血友病A是凝血因子VIII(FVIII)缺乏或异常引起的主要遗传性出血性疾病之一。 已经用全血浆或纯化的FVIII浓缩物治疗血友病患者。 传播血源性病毒的风险和高度纯化的FVIII的成本是限制血友病治疗预防的主要因素。 生物技术革命带来的挑战之一是开发大规模经济生产高纯度蛋白质的方法。 本发明提供了可用于在转基因动物的牛奶中高水平表达基因的改进的乳腺表达盒。 特别地,本发明提供了衍生自α-乳白蛋白的重组信号肽序列和适合于在乳腺中引导蛋白质分泌的α1酪蛋白乳基因。 这些基因盒能够递送不同的转基因构建体,其导致在转基因动物体内产生全长或B结构域缺失的生物活性人类FVIII的治疗水平。 在本发明的范围内,也是用于生产能够表达人FVIII的转基因非人哺乳动物如小鼠,大鼠,兔,山羊,绵羊,猪和牛物种的方法,以及制备牛奶的方法和鉴定方法 来自转基因乳的蛋白质。