The invention provides a conjugate of a Neisseria meningitidis serogroup X capsular polysaccharide and a carrier molecule. The conjugate is typically made by (a) oxidising a primary hydroxyl group in the capsular polysaccharide, to give an oxidised polysaccharide with an aldehyde group; and (b) coupling the oxidised polysaccharide to a carrier molecule via the aldehyde group, thereby giving the conjugate. The conjugate may be part of an immunogenic composition. This composition may comprise one or more further antigens, particularly capsular polysaccharides from serogroups A, W135, C and Y and conjugated forms thereof. The composition may be in an aqueous formulation. The composition is useful as a vaccine, e.g. for raising an immune response in a mammal. The invention also provides processes for making the conjugate.
本发明提供了一种 X 型奈瑟氏脑膜炎球菌荚膜
多糖与载体分子的共轭物。该共轭物通常通过以下方法制成:(a) 氧化荚膜
多糖中的伯羟基,得到带有醛基的氧化
多糖;(b) 通过醛基将氧化
多糖与载体分子偶联,从而得到共轭物。轭合物可以是免疫原组合物的一部分。这种组合物可包含一种或多种其他抗原,特别是来自血清 A、W135、C 和 Y 族的荚膜
多糖及其共轭形式。该组合物可以是
水溶液制剂。该组合物可用作疫苗,例如用于提高哺乳动物的免疫反应。本发明还提供了制造共轭物的工艺。