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- W4281644216 abstract "Pneumococcal conjugate vaccines (PCVs) used in childhood vaccination programs have resulted in replacement of vaccine-type with nonvaccine-type pneumococci in carriage and invasive pneumococcal disease (IPD). A vaccine based on highly conserved and protective pneumococcal antigens is urgently needed. Here, we performed intranasal immunization of mice with pneumococcal membrane particles (MPs) to mimic natural nasopharyngeal immunization. MP immunization gave excellent serotype-independent protection against IPD that was antibody dependent but independent of the cytotoxin pneumolysin. Using Western blotting, immunoprecipitation, mass spectrometry, and different bacterial mutants, we identified the conserved lipoproteins MalX and PrsA as the main antigens responsible for cross-protection. Additionally, we found that omitting the variable surface protein and vaccine candidate PspA from MPs enhanced protective immune responses to the conserved proteins. Our findings suggest that MPs containing MalX and PrsA could serve as a platform for pneumococcal vaccine development targeting the elderly and immunocompromised." @default.
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- W4281644216 date "2022-06-01" @default.
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- W4281644216 title "Membrane particles evoke a serotype-independent cross-protection against pneumococcal infection that is dependent on the conserved lipoproteins MalX and PrsA" @default.
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- W4281644216 doi "https://doi.org/10.1073/pnas.2122386119" @default.
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