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    • 6. 发明申请
    • Novel g-csf conjugates
    • 新型g-csf缀合物
    • US20070166278A1
    • 2007-07-19
    • US11578390
    • 2005-04-06
    • Francesco VeroneseManuela Berna
    • Francesco VeroneseManuela Berna
    • A61K38/19C07K14/53
    • A61K47/60
    • The present application relates to novel PEG-G-CSF conjugates in which a PEG molecule is linked to the cyteine residue in position 17 of native G-CSF primary sequence or to the cysteine residue of the corresponding position of a G-CSF analogue. The present application also describes a process for the manufacture of such conjugates, such process comprising the following steps: (i) subjecting the G-CSF protein to conditions inducing reversible denaturation of the protein, (ii) conjugation of the denatured protein obtained is step i with a thiol-reactivc PEG under denaturing conditions, (iii) subjecting the conjugates obtained in step ii to conditions promoting renaturation of the conjugate yielding biologically active G-CSF-PEG conjugate.
    • 本申请涉及新的PEG-G-CSF缀合物,其中PEG分子连接到天然G-CSF初级序列的第17位的cyteine残基或与G-CSF类似物的相应位置的半胱氨酸残基连接。 本申请还描述了制备这种缀合物的方法,该方法包括以下步骤:(i)使G-CSF蛋白经受诱导蛋白质可逆变性的条件,(ii)获得的变性蛋白质的缀合是步骤 i在变性条件下具有硫醇反应性PEG,(iii)使步骤ii中获得的缀合物经受促进缀合物复性的条件,以产生生物活性G-CSF-PEG缀合物。