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    • 2. 发明授权
    • Genetic suppression and replacement
    • 遗传抑制和替代
    • US08551970B2
    • 2013-10-08
    • US12710343
    • 2010-02-22
    • Gwenyth Jane FarrarPeter HumphriesPaul Francis Kenna
    • Gwenyth Jane FarrarPeter HumphriesPaul Francis Kenna
    • A61K48/00A61K38/00A01N43/04C07H21/04C12Q1/68
    • A61K48/00C12N5/00C12N15/00
    • Methods and agents for suppressing expression of a mutant allele of a gene and providing a replacement nucleic acid are provided. The methods of the invention provide suppression effectors such as, for example, antisense nucleic acids, ribozymes, or RNAi, that bind to the gene or its RNA. The invention further provides for the introduction of a replacement nucleic acid with modified sequences such that the replacement nucleic acid is protected from suppression by the suppression effector. The replacement nucleic acid is modified at degenerate wobble positions in the target region of the suppression effector and thereby is not suppressed by the suppression effector. In addition, by altering wobble positions, the replacement nucleic acid can still encode a wild type gene product. The invention has the advantage that the same suppression strategy could be used to suppress, in principle, many mutations in a gene. Also disclosed is a transgenic mouse that expresses human rhodopsin (modified replacement gene) and a transgenic mouse that expresses a suppression effector targeting rhodopsin. Also disclosed in intraocular administration of siRNA.
    • 提供了用于抑制基因突变等位基因表达并提供置换核酸的方法和试剂。 本发明的方法提供了结合该基因或其RNA的抑制效应物,例如反义核酸,核酶或RNAi。 本发明进一步提供了具有修饰序列的替代核酸的引入,使得替代核酸被抑制抑制效应物抑制。 替代核酸在抑制效应物的目标区域中的简并摆动位置被修饰,从而不被抑制效应物抑制。 此外,通过改变摆动位置,替代核酸仍然可以编码野生型基因产物。 本发明的优点在于,相同的抑制策略原则上可用于抑制基因中的许多突变。 还公开了表达人类视紫质(修饰的替代基因)的转基因小鼠和表达抑制效应物靶向视紫红质的转基因小鼠。 还在siRNA的眼内给药中也公开。