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Isotype-Specific Outcomes In Fc Gamma Receptor Targeting Of Pspa Using Fusion Proteins As A Vaccination Strategy Against Streptococcus Pneumoniae Infection, Kari Wiedinger Jul 2020

Isotype-Specific Outcomes In Fc Gamma Receptor Targeting Of Pspa Using Fusion Proteins As A Vaccination Strategy Against Streptococcus Pneumoniae Infection, Kari Wiedinger

Seton Hall University Dissertations and Theses (ETDs)

Streptococcus pneumoniae (Spn) remains a considerable threat to public health despite the availability of antibiotics and polysaccharide conjugate vaccines. The lack of mucosal immunity in addition to capsular polysaccharide diversity, has proved to be problematic in developing a universal vaccine against Spn. Targeting antigen to Fc receptors is an attractive way to augment both innate and adaptive immunity against mucosal pathogens, by promoting interactions with activating Fcγ receptors (FcγR) that mediate diverse immunomodulatory functions. The effect of targeting FcγR is highly influenced by the IgG subclass, which bares differential affinities for activating and inhibitory FcγR. In the current study we …


Characterization Of The Protective Role Of Th17 Cells In An Fc Receptor-Targeted Vaccine Strategy Against Fracisella Tularensis Infection, Kyle Devenney Sep 2018

Characterization Of The Protective Role Of Th17 Cells In An Fc Receptor-Targeted Vaccine Strategy Against Fracisella Tularensis Infection, Kyle Devenney

Seton Hall University Dissertations and Theses (ETDs)

Using a murine model, we have previously showed that targeting an inactivated form of F.tularensis (iFt) bacteria to Fcg receptors by utilizing an IgG2a, anti-LPS monoclonal antibody (mAb) provides 100% protection against a lethal dose with the live vaccine strain (LVS). The binding of anti-LPS monoclonal antibodies and iFt create an immune complex (mAb-iFt) allowing the Fc-region of the antibody to target Fc receptors expressed on antigen presenting cells, leading to a more robust and effective processing and presentation of the bacterial antigens. Although the resulting protective response generated relies on both humoral and cell-mediated immunity, in our study we …


Utilization Of Cholera Toxin B As An Adjuvant For The Subunit Pspa Vaccine, Provides Effective Protection Against Streptococcus Pneumoniae Challenge, Daniel R. Pinho Aug 2016

Utilization Of Cholera Toxin B As An Adjuvant For The Subunit Pspa Vaccine, Provides Effective Protection Against Streptococcus Pneumoniae Challenge, Daniel R. Pinho

Seton Hall University Dissertations and Theses (ETDs)

Streptococcus pneumoniae is a prevalent human pathogen associated with pneumonia. It is estimated that approximately 1 million people around the world die each year, specifically with young children and the elderly comprising a significant portion. Currently, antibiotics can treat the infection but individuals such as the young or elderly are more susceptible to bodily damage from symptoms, such as pneumonia, meningitis, and sepsis, thus require more preventive measures. As a result, vaccinations are a key solution to providing effective protection against infectious pathogens. Presently, two vaccinations exist in the market: PPSV23 and PCV13, which only protect against …


Synthesis And Evaluation Of Biological Activity Of A Potential Immunomodulatory Zwitterionic Polysaccharide, Vikram Basava May 2016

Synthesis And Evaluation Of Biological Activity Of A Potential Immunomodulatory Zwitterionic Polysaccharide, Vikram Basava

Seton Hall University Dissertations and Theses (ETDs)

The gram-negative anaerobic bacterium Bacteroides fragilis is an integral component of the normal gastrointestinal flora. The bacterium colonizes the intestinal tract of human beings as it has no reservoir other than mammals. An unprecedented proportion of the genomic DNA of B. fragilus is involved in the production of capsular polysaccharides. These capsular polysaccharides are important virulence factors in most extracellular bacterial pathogens. Eight of these polysaccharides have been identified thus far, out of which two were found to be zwitterionic polymers, PSA1 and PSA2. PSA1 was found to stimulate T-cell lineage of the immune system because of the dual charge …