Vaccines targeting glycan structures at the surface of pathogenic microbes must overcome the inherent T cell–independent nature of immune responses against glycans. Carbohydrate conjugate vaccines achieve this by coupling bacterial polysaccharides to a carrier protein that recruits heterologous CD4 T cells to help B cell maturation. Yet they most often produce low- to medium-affinity immune responses of limited duration in immunologically fit individuals and disappointing results in the elderly and immunocompromised patients. Here, we hypothesized that these limitations result from suboptimal T cell help. To produce the next generation of more efficacious conjugate vaccines, we have explored a synthetic design aimed at focusing both B cell and T cell recognition to a single short glycan displayed at the surface of a virus-like particle. We tested and established the proof of concept of this approach for 2 serotypes of
Zinaida Polonskaya, Shenglou Deng, Anita Sarkar, Lisa Kain, Marta Comellas-Aragones, Craig S. McKay, Katarzyna Kaczanowska, Marie Holt, Ryan McBride, Valle Palomo, Kevin M. Self, Seth Taylor, Adriana Irimia, Sanjay R. Mehta, Jennifer M. Dan, Matthew Brigger, Shane Crotty, Stephen P. Schoenberger, James C. Paulson, Ian A. Wilson, Paul B. Savage, M.G. Finn, Luc Teyton
Innate immune signaling and cognate CD4 T cells are essential for anti-glycan antibody responses.