发明名称 |
<i>H. pylori </i>lipopolysaccharide outer core epitope |
摘要 |
Dextrans produced by lactic acid bacteria Leuconostoc mesenteroides and consisting of linear α1,6-glucan chains modified with short side-chains composed of consecutive α1,6-linked glucose residues were linked to a carrier protein. Three dextrans, namely Dextran-5K, Dextran-3.5K and Dextran-1.5K, with molecular masses of 5,000 Da, 3,500 Da and 1,500 Da, respectively, were modified with a diamino group-containing linker, followed by the introduction of maleimido functionality and conjugation to thiolated tetanus toxoid (TT), yielding Dextran-5K-TT, Dextran-3.5K-TT and Dextran-1.5K-TT conjugates. Studies performed with post-immune sera of mice and rabbits immunized with dextran-based glycococonjugates demonstrated cross-reactivity with LPS from typeable and non-typeable H. pylori strains and selected mutants. The post-immune sera from rabbits that received the conjugates exhibited functional activity against α1,6-glucan-positive strains of H. pylori, 26695 HP0826::Kan mutant lacking the O-chain component and corresponding wild-type strain 26695. This study provides the proof that α1,6-glucan-based conjugates provide an alternative vaccine strategy for protection against H. pylori infections. |
申请公布号 |
US9328158(B2) |
申请公布日期 |
2016.05.03 |
申请号 |
US201213347029 |
申请日期 |
2012.01.10 |
申请人 |
National Research Council of Canada |
发明人 |
Altman Eleanora;Harrison Blair A.;Chandan Vandana |
分类号 |
A61K39/02;C07K16/12;A61K47/48;C08B37/00;C08L5/02;A61K39/00;C07K17/10;C08L5/00 |
主分类号 |
A61K39/02 |
代理机构 |
Ade & Company Inc. |
代理人 |
Williams Michael R.;Ade & Company Inc. |
主权项 |
1. An immunogenic conjugate comprising an isolated dextran conjugated to a linker molecule, an isolated protein carrier, or a combination thereof, wherein the isolated dextran comprises a substantially linear alpha 1,6-glucan chain of 6 to 14 consecutive glucose residues and has an average molecular weight between 1.5 kDa and 6.5 kDa and wherein the conjugate, upon administration to a mammal, elicits alpha 1,6-1inked glucan-specific antibodies that are cross-reactive with the lipopolysaccharide (LPS) of Heliobacter pylori (H. pylori) and that are bactericidal against H. pylori. |
地址 |
Ottawa, Ontario CA |