Hypo- and hyper-acetylated meningococcal capsular saccharides

C - Chemistry – Metallurgy – 08 – B

Patent

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Details

C08B 37/00 (2006.01) A61K 31/7016 (2006.01) A61K 31/702 (2006.01) A61K 31/715 (2006.01) A61K 39/02 (2006.01) A61K 39/09 (2006.01) A61K 39/095 (2006.01) C07H 3/04 (2006.01) C07H 3/06 (2006.01) C08L 5/00 (2006.01)

Patent

CA 2541020

Capsular saccharides derived from serogroups W135 and Y of Neisseria meningitidis have altered levels of O-acetylation at the 7 and 9 positions of their sialic acid residues, and can be used to make immunogenic compositions. Relative to unmodifed native saccharides, derivatives of the invention are preferentially selected during conjugation to carrier proteins, and conjugates of the derivatives show improved immunogenicity compared to native polysaccharides.

L'invention concerne des saccharides capsulaires dérivés des sérogroupes W135 et Y de Neisseria meningitidis et présentant des taux modifiés d'acétylation en ortho au niveau des sites 7 et 9 de leurs résidus d'acide sialique, et pouvant être utilisés pour fabriquer des compositions immunogènes. Par rapport aux saccharides natifs non modifiés, les dérivés décrits sont de préférence sélectionnés lorsqu'ils sont conjugués à des protéines vectrices, et des conjugués de ces dérivés présentent une immunogénicité améliorée par rapport aux polysaccharides natifs.

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