Chemical and Biological Engineering, Nanovaccine Institute
Research Focus Area
Advanced and Nanostructured Materials, Health Care Technology and Biomedical Engineering
Journal or Book Title
Nanomedicine: Nanotechnology, Biology and Medicine
The primary objective of this study was to enhance the antitumor efficacy of a model cancer vaccine through co-delivery of pentaerythritol lipid A (PELA), an immunological adjuvant, and a model tumor antigen, ovalbumin (OVA), separately loaded into polyanhydride particles (PA). In vitro experiments showed that encapsulation of PELA into PA (PA-PELA) significantly enhanced its stimulatory capacity on dendritic cells as evidenced by increased levels of the cell surface costimulatory molecules, CD80/CD86. In vivo experiments showed that PA-PELA, in combination with OVA-loaded PA (PA-OVA), significantly expanded the OVA-specific CD8+ T lymphocyte population compared to PA-OVA alone. Furthermore, serum OVA-specific antibody titers of mice vaccinated with PA-OVA/PA-PELA displayed a significantly stronger shift toward a Th1-biased immune response compared to PA-OVA alone, as evidenced by the substantially higher IgG2C:IgG1 ratios achieved by the former. Analysis of E.G7-OVA tumor growth curves showed that mice vaccinated with PA-OVA/PA-PELA had the slowest average tumor growth rate.
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Wafa, Emad I.; Geary, Sean M.; Ross, Kathleen A.; Goodman, Jonathan T.; Narasimhan, Balaji; and Salem, Aliasger K., "Pentaerythritol-based lipid A bolsters the antitumor efficacy of a polyanhydride particle-based cancer vaccine" (2019). Chemical and Biological Engineering Publications. 382.