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Neisseria meningitidis X群胶囊
多糖和载体分子的结合物。该结合物通常是通过以下步骤制备的:(a)
氧化胶囊
多糖中的主要羟基,以得到具有醛基的
氧化
多糖;(b)通过醛基将
氧化
多糖与载体分子偶联,从而得到结合物。该结合物可以是免疫原组合物的一部分。该组合物可以包括一个或多个进一步的抗原,特别是A、W135、C和Y群的胶囊
多糖及其结合形式。该组合物可以是
水性配方。该组合物可用作疫苗,例如用于提高哺乳动物的免疫反应。本发明还提供了制备结合物的方法。