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公开(公告)号:US20100239497A1
公开(公告)日:2010-09-23
申请号:US12670925
申请日:2008-07-16
CPC分类号: A61K51/08
摘要: The present invention describes chemically modified avidins that have higher permanence in treated tissues compared to wild type avidin. Avidin oxidation is performed by periodate incubation in the presence of the low affinity ligand HABA which, occupying the biotin binding sites, prevents protein denaturation during the oxidation step. Periodate oxidation generates CHO groups from avidin mannose ring opening that, once injected, react with tissue NH2 residues to form stable Schiff's bases. The anchored avidins maintain the ability to bind biotinylated agents endowed of therapeutic activity, like radiolabeled biotins, stem cells and somatic cells, useful for brachytherapies like Intraoperative Avidination Radionuclide Therapy (IART®) or degenerative or genetic diseases.
摘要翻译: 本发明描述了与野生型抗生物素蛋白相比,在处理组织中具有更高持久性的化学修饰的avidins。 在低亲和性配体HABA存在下,通过高碘酸盐温育进行抗生物素蛋白氧化,其占据生物素结合位点,防止氧化步骤期间的蛋白质变性。 高碘酸氧化从抗生物素蛋白甘露糖开环产生CHO基团,一旦注射,与组织NH2残留物反应形成稳定的席夫碱。 锚定的avidins保持结合具有治疗活性的生物素化试剂的能力,如放射性标记的生物素,干细胞和体细胞,可用于诸如术中放射性放射性核素治疗(IART)或退行性或遗传性疾病之类的近程疗法。