Dataset Information

Vault nanocapsules as adjuvants favor cell-mediated over antibody-mediated immune responses following immunization of mice.

ABSTRACT:

Background

Modifications of adjuvants that induce cell-mediated over antibody-mediated immunity is desired for development of vaccines. Nanocapsules have been found to be viable adjuvants and are amenable to engineering for desired immune responses. We previously showed that natural nanocapsules called vaults can be genetically engineered to elicit Th1 immunity and protection from a mucosal bacterial infection. The purpose of our study was to characterize immunity produced in response to OVA within vault nanoparticles and compare it to another nanocarrier.

Methodology and principal findings

We characterized immunity resulting from immunization with the model antigen, ovalbumin (OVA) encased in vault nanocapsules and liposomes. We measured OVA responsive CD8(+) and CD4(+) memory T cell responses, cytokine production and antibody titers in vitro and in vivo. We found that immunization with OVA contain in vaults induced a greater number of anti-OVA CD8(+) memory T cells and production of IFN? plus CD4(+) memory T cells. Also, modification of the vault body could change the immune response compared to OVA encased in liposomes.

Conclusions/significance

These experiments show that vault nanocapsules induced strong anti-OVA CD8(+) and CD4(+) T cell memory responses and modest antibody production, which markedly differed from the immune response induced by liposomes. We also found that the vault nanocapsule could be modified to change antibody isotypes in vivo. Thus it is possible to create a vault nanocapsule vaccine that can result in the unique combination of immunogen-responsive CD8(+) and CD4(+) T cell immunity coupled with an IgG1 response for future development of vault nanocapsule-based vaccines against antigens for human pathogens and cancer.

SUBMITTER: Kar UK

PROVIDER: S-EPMC3394761 | biostudies-literature | 2012

REPOSITORIES: biostudies-literature

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Publications

Vault nanocapsules as adjuvants favor cell-mediated over antibody-mediated immune responses following immunization of mice.

Kar Upendra K UK Jiang Janina J Champion Cheryl I CI Salehi Sahar S Srivastava Minu M Sharma Sherven S Rabizadeh Shahrooz S Niazi Kayvan K Kickhoefer Valerie V Rome Leonard H LH Kelly Kathleen A KA

PloS one 20120711 7

<h4>Background</h4>Modifications of adjuvants that induce cell-mediated over antibody-mediated immunity is desired for development of vaccines. Nanocapsules have been found to be viable adjuvants and are amenable to engineering for desired immune responses. We previously showed that natural nanocapsules called vaults can be genetically engineered to elicit Th1 immunity and protection from a mucosal bacterial infection. The purpose of our study was to characterize immunity produced in response to ...[more]

PMID: 22808011

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Dataset Information

Vault nanocapsules as adjuvants favor cell-mediated over antibody-mediated immune responses following immunization of mice.

Background

Methodology and principal findings

Conclusions/significance

Publications

Vault nanocapsules as adjuvants favor cell-mediated over antibody-mediated immune responses following immunization of mice.

Similar Datasets

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