Aluminum phosphate adjuvant surface interacting with Enterovirus A71 virion antigen (AlPO4-EV-A71)

The interaction between the aluminum phosphate adjuvant surface and the Enterovirus A71 (EV-A71) virion antigen is a physicochemical process central to the formulation of inactivated EV-A71 vaccines (Mao et al., 2016, Vaccine). Aluminum phosphate (AlPO4) serves as an adjuvant that adsorbs the viral particles, primarily through electrostatic interactions and ligand exchange, which stabilizes the antigen and prevents its degradation (He et al., 2013, Human Vaccines & Immunotherapeutics). This complex acts by creating a "depot" at the injection site, allowing for the slow release of the antigen and prolonged exposure to the immune system (Lindblad, 2004, Vaccine). Furthermore, the adjuvant-antigen complex enhances the recruitment and activation of antigen-presenting cells (APCs), such as dendritic cells, which is essential for inducing a robust neutralizing antibody response against EV-A71 (Li et al., 2014, The Lancet). While this interaction is vital for the efficacy of the vaccine, it is a component of the drug delivery system rather than a biological receptor or therapeutic target in the host (Exley, 2011, BMC Medicine). Understanding the surface chemistry of this interaction is crucial for optimizing vaccine stability and ensuring consistent immunogenicity across manufacturing batches (Shi et al., 2015, Vaccine).

Other names

Aluminum phosphate-adsorbed Enterovirus 71EV71-AlPO4 complexAdsorbed EV-A71 antigenAluminum phosphate-adsorbed EV-A71

The aluminum phosphate adjuvant adsorbs the EV-A71 antigen to enhance immunogenicity by facilitating antigen uptake by dendritic cells and providing a sustained release depot.