A bivalent vaccine to protect against Streptococcus pneumoniae and Salmonella typhi.
A bivalent vaccine to protect against Streptococcus pneumoniae and Salmonella typhi.
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DOI：
10.1016/j.vaccine.2012.03.039
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发表时间：
2012-05-14
期刊：
影响因子：
5.5
通讯作者：
Malley, Richard
中科院分区：
文献类型：
--
作者：
Lu, Ying-Jie;Zhang, Fan;Sayeed, Sabina;Thompson, Claudette M.;Szu, Shousun;Anderson, Porter W.;Malley, Richard
Pneumococcal and Salmonella typhi infections are two major diseases for children in developing countries. For typhoid fever, licensed Vi polysaccharide vaccines are ineffective in children <2 year-old. While investigational Vi conjugate vaccines have been shown effective in clinical trials, they are currently only available to restricted areas. Pneumococcal capsular polysaccharide conjugate vaccines are highly effective in children, but suffer from some limitations including cost and limited serotype coverage. We have previously shown that a fusion conjugate vaccine, consisting of pneumococcal fusion protein PsaA and pneumolysoid (PdT) conjugated to a polysaccharide, results in enhanced antibody and CD4+ Th17 cell responses as well as protection against pneumococcal colonization and disease in mice. Here we applied this approach to develop a bivalent vaccine against pneumococcus and S. typhi. Two species-conserved pneumococcal antigens (SP1572 or SP2070) were fused to the nonhemolytic pneumolysoid PdT. SP1572-PdT was then conjugated to Vi polysaccharide and SP2070-PdT was conjugated to the pneumococcal cell wall polysaccharide (CWPS; also conserved). Mice immunized with this bivalent conjugate were protected against pneumococcal colonization and sepsis challenges, and made anti-Vi antibody concentrations higher by 40 fold compared to mice that received equimolar mixtures of the antigens. An enhanced killing of Vi-bearing Salmonellae in vitro was demonstrated from plasma of mice that received the fusion conjugate but not the mixture of antigens. Our results support further evaluation of this bivalent immunogen for the prevention of pneumococcal colonization and disease, and of typhoid fever.
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影响因子：
5.5
作者：
Lu, Ying-Jie;Leite, Luciana;Goncalves, Viviane Maimoni;Dias, Waldely de Oliveira;Liberman, Celia;Fratelli, Fernando;Alderson, Mark;Tate, Andrea;Maisonneuve, Jean-Francois;Robertson, George;Graca, Rita;Sayeed, Sabina;Thompson, Claudette M.;Anderson, Porter;Malley, Richard
通讯作者：
Malley, Richard
白介素17a介导获得的对肺炎球菌定殖的免疫力。
影响因子：
6.7
作者：
Lu, Ying-Jie;Gross, Jane;Bogaert, Debby;Finn, Adam;Bagrade, Linda;Zhang, Qibo;Kolls, Jay K.;Srivastava, Amit;Lundgren, Anna;Forte, Sophie;Thompson, Claudette M.;Harney, Kathleen F.;Anderson, Porter W.;Lipsitch, Marc;Malley, Richard
通讯作者：
Malley, Richard
DOI：
10.1073/pnas.0501254102
发表时间：
2005-03-29
影响因子：
11.1
作者：
Malley, R;Trzcinski, K;Lipsitch, M
通讯作者：
Lipsitch, M
影响因子：
5.5
作者：
Azze, RFO;Rodríguez, JCM;Padrón, FTS
通讯作者：
Padrón, FTS
DOI：
10.4269/ajtmh.2000.62.644
发表时间：
2000-05-01
影响因子：
3.3
作者：
Lin, FYC;Ho, VA;Robbins, JB
通讯作者：
Robbins, JB