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    • 4. 发明申请
    • MUTANT OF GRANULOCYTE-COLONY STIMULATING FACTOR(G-CSF) AND CHEMICALLY CONJUGATED POLYPEPTIDE THEREOF
    • 粒细胞集落刺激因子(G-CSF)和化学结合多肽的突变体
    • WO2007011166A1
    • 2007-01-25
    • PCT/KR2006/002841
    • 2006-07-19
    • MOGAM BIOTECHNOLOGY RESEARCH INSTITUTEKANG, Kwan-YubHONG, Jeong-Woon
    • KANG, Kwan-YubHONG, Jeong-Woon
    • C07K14/535A61K47/48
    • C07K14/535A61K47/60
    • Provided are mutants of human granulocyte-colony stimulating factor (G-CSF) designed for specific chemical conjugation, and chemical conjugates thereof for use as an adjuvant in the treatment of cancer. The present invention provides a mutant of a G-CSF in which a threonine (Thr) residue at position 133 of G-CSF comprising the amino acid sequence identified in SEQ ID NO: 1 is substituted with a cysteine (Cys) residue. In addition, the invention provides a mutant of a G-CSF in which a cysteine (Cys) residue is inserted between a glycine (GIy) residue at position 135 and an alanine (Ala) residue at position 136 of G-CSF. Further, the invention provides a chemically conjugated mutant G-CSF to which biocompatible polymer such as polyethylene glycol (PEG) was attached at the cysteine residue, which was introduced by the substitution or insertion mutation, increasing its in vivo retention time without reducing in vivo biological activity due to the conjugation with the biocompatible polymer, thereby ultimately extending the in vivo biological activity.
    • 提供设计用于特定化学共轭的人粒细胞集落刺激因子(G-CSF)的突变体,以及用作癌症治疗中的佐剂的化学共轭物。 本发明提供了G-CSF的突变体,其中包含SEQ ID NO:1中鉴定的氨基酸序列的G-CSF的第133位的苏氨酸(Thr)残基被半胱氨酸(Cys)残基取代。 此外,本发明提供了G-CSF的突变体,其中将半胱氨酸(Cys)残基插入在135位的甘氨酸(Gly)残基和G-CSF的第136位的丙氨酸(Ala)残基之间。 此外,本发明提供了在半胱氨酸残基处连接生物相容性聚合物如聚乙二醇(PEG)的化学偶联的突变体G-CSF,其通过取代或插入突变引入,增加其体内保留时间而不降低体内 由于与生物相​​容性聚合物共轭而产生的生物活性,从而最终延长了体内的生物活性。