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    • 2. 发明公开
    • 5 혈청형 폐렴연쇄구균 피막 폴리사카라이드의 환원적아민화에 의해 수득된 접합체
    • 通过减少氨基酸序列5阳离子聚糖多糖获得的结合
    • KR1020050093838A
    • 2005-09-23
    • KR1020057013266
    • 2004-01-16
    • 사노피 파스퇴르 에스에이
    • 미스트리타,노엘댄비,에밀리에모레우,모니크
    • C08B37/00A61K39/385A61K39/09
    • A61K39/092A61K2039/6037C08B37/006
    • The invention relates to conjugates obtained by reductive amination of serotype 5 pneumococcus capsular polysaccharide. The reductive amination conditions differ from conventional conditions in that they avoid the creation of an undesired compound which is harmful to the immunogenicity of the conjugates. In carbon NMR spectrometry, the undesired compound is characterized by a resonance signal of 13 -14 ppm. The aminated polysaccharides involved in the production of the conjugates have a carbon NMR spectrum devoid of a resonance signal of 13 -14 ppm. The reductive amination conditions according to the invention are twofold. According to a first method, the reductive amination is performed at a pH which is slightly acidic (4-6, 5) for a maximum of 4 hours. According to a second method, the polysaccharide is initially reduced, then fragmented and finally undergoes the reductive amination per se in conventional or unconventional conditions. According to the method used, the structure of the aminated polysaccharide can vary (conversion or not of the Sug residue of the repeater unit into N-acetyl quinovosamine and N-acetyl fucosamine) but said variations, as recorded in carbon NMR spectrometry, have no effect on immunogenicity.
    • 本发明涉及通过血清型5肺炎球菌荚膜多糖的还原胺化得到的结合物。 还原胺化条件不同于常规条件,因为它们避免产生对共轭物的免疫原性有害的不需要的化合物。 在碳NMR光谱法中,不期望的化合物的特征在于13-14ppm的共振信号。 参与共轭物生产的胺化多糖具有没有13-14ppm共振信号的碳NMR谱。 根据本发明的还原胺化条件是双重的。 根据第一种方法,还原性胺化在稍微酸性(4-6,5)的pH下进行最多4小时。 根据第二种方法,在常规或非常规条件下,多糖最初被还原,然后被分解并最终经历还原胺化。 根据所使用的方法,胺化多糖的结构可以变化(中转单元的Sug残基转化为或不转化成N-乙酰基喹诺胺和N-乙酰基岩藻糖),但是如在碳NMR光谱法中记载的那样, 对免疫原性的影响。