REDUCTION OF ENDOTOXIN IN POLYSIALIC ACIDS
    3.
    发明申请
    REDUCTION OF ENDOTOXIN IN POLYSIALIC ACIDS 审中-公开
    减少多糖中的内毒素

    公开(公告)号:US20110159130A1

    公开(公告)日:2011-06-30

    申请号:US12528763

    申请日:2008-02-28

    IPC分类号: A61K35/74 C07K14/00 C12P21/06

    摘要: The present invention relates to process for reducing the endotoxin content of a sample of fermentation broth containing polysialic acid and endotoxin comprising the sequential steps: (i) adding to the sample a base having a pKa of at least 12 to form a basic solution having a pH of at least 12, incubating the solution for a pre-determined time at a pre-determined temperature; and (ii) recovery of PSA, suitably by (iii) passing the sample through an anion-exchange column whereby polysialic acid is absorbed on the ion exchange resin; (iv) washing the column with one washing buffer, whereby polysialic acid remains absorbed on the ion exchange resin; and (v) eluting the polysialic acid from the column using an elution buffer to provide a product solution of polysialic acid having reduced endotoxin content.

    摘要翻译: 本发明涉及降低含有唾液酸和内毒素的发酵肉汤样品的内毒素含量的方法,其包括以下顺序步骤:(i)向样品中加入pKa至少为12的碱,以形成具有 pH至少为12,在预定温度下将溶液温育预定时间; 和(ii)PSA的回收,适当地通过(iii)使样品通过阴离子交换柱,由此唾液酸被吸收在离子交换树脂上; (iv)用一个洗涤缓冲液洗涤该柱,由此聚唾液酸保持吸收在离子交换树脂上; 和(v)使用洗​​脱缓冲液从柱洗脱聚唾液酸以提供具有降低的内毒素含量的聚唾液酸的产物溶液。

    GLYCOPOLYSIALYLATION OF NON-BLOOD COAGULATION PROTEINS
    9.
    发明申请
    GLYCOPOLYSIALYLATION OF NON-BLOOD COAGULATION PROTEINS 有权
    非血液凝聚蛋白的糖苷化

    公开(公告)号:US20110027350A1

    公开(公告)日:2011-02-03

    申请号:US12843284

    申请日:2010-07-26

    摘要: A water soluble polymer, in particular polysialic acid (PSA) or a modified PSA (mPSA), is conjugated to an oxidized carbohydrate moiety of a glycoprotein other than a blood coagulation protein or to a ganglioside or drug delivery system by contacting the oxidized carbohydrate moiety with the water soluble polymer, wherein said water soluble polymer contains an aminooxy group and an oxime linkage is formed between the oxidized carbohydrate moiety and the aminooxy group on the water soluble polymer or wherein said water soluble polymer contains a hydrazide group and a hydrazone linkage is formed between the oxidized carbohydrate moiety and the hydrazide group on the water soluble polymer. Conjugates of aminooxy- or hydrazide-water soluble polymer, such as PSA and mPSA, are thus obtained in which the PSA or mPSA is attached via a carbohydrate moiety.

    摘要翻译: 将水溶性聚合物,特别是聚唾液酸(PSA)或修饰的PSA(mPSA)与不同于凝血蛋白的糖蛋白的氧化碳水化合物部分或通过使氧化的碳水化合物部分接触而与神经节苷脂或药物递送系统结合 其中所述水溶性聚合物含有氨基氧基,并且在水溶性聚合物上的氧化碳水化合物部分和氨基氧基之间形成肟键,或者其中所述水溶性聚合物含有酰肼基团,腙键是 形成在水溶性聚合物上的氧化碳水化合物部分和酰肼基团之间。 因此得到氨基氧基或酰肼 - 水溶性聚合物如PSA和mPSA的结合物,其中PSA或mPSA通过碳水化合物部分连接。