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    • 1. 发明授权
    • Mutant of granulocyte-colony stimulating factor (G-CSF) and chemically conjugated polypeptide thereof
    • 粒细胞集落刺激因子(G-CSF)突变体及其化学结合多肽
    • US08841426B2
    • 2014-09-23
    • US11995968
    • 2006-07-19
    • Kwan-Yub KangJeong-Woon Hong
    • Kwan-Yub KangJeong-Woon Hong
    • A61K38/24C07K1/00C07K14/535A61K47/48
    • 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。
    • 5. 发明授权
    • Detoxified mutants of escherichia coli heat-labile enterotoxin
    • 大肠杆菌热不稳定肠毒素的解毒突变体
    • US07722887B1
    • 2010-05-25
    • US10088202
    • 1999-09-15
    • Eun Jeong ParkJang Seong KimJihoon ChangJungsun YumSoo-il Chung
    • Eun Jeong ParkJang Seong KimJihoon ChangJungsun YumSoo-il Chung
    • A61K39/108A61K39/38A61K39/02A61K38/00
    • C07K14/245A61K39/00
    • The present invention relates to detoxified and immunologically active proteins (“mutant LTs”) having mutated amino acid sequences of heat-labile enterotoxin of E. coli, DNA sequences encoding the mutant LTs, recombinant expression vectors comprising the DNAs, recombinant microorganisms transformed with the recombinant expression vectors, process for preparing the mutant LTs and pharmaceutical application of the said protein as immunogenic antigens for vaccination and as adjuvants for anti-body production. In contrast to wild-type LT, the mutant LTs did not induce any toxic activities. The mutant LTs elicited high and comparable levels of anti-LT antibodies when delivered either intragastrically or intranasally, inducing systemic and local responses in serum and fecal extracts. Thus, they might be useful for the development of a novel diarrheal vaccine in humans and animals. In addition, the antibody production ability using mutant LTs as an adjuvant may be effective for prevention and treatment of various diseases.
    • 本发明涉及具有大肠杆菌热不稳定肠毒素突变氨基酸序列的解毒和免疫活性蛋白(“突变LT”),编码突变LT的DNA序列,包含DNA的重组表达载体,用 重组表达载体,用于制备突变LT的方法和所述蛋白质的药物应用作为用于疫苗接种的免疫原性抗原以及用于抗体产生的佐剂。 与野生型LT相比,突变LT不诱导任何毒性活性。 突变LTs在胃内或鼻内递送时引起高水平和相当水平的抗LT抗体,在血清和粪便提取物中诱导全身和局部反应。 因此,它们可能对于在人和动物中发展新的腹泻疫苗是有用的。 此外,使用突变型LTs作为佐剂的抗体生产能力可有效预防和治疗各种疾病。