The present invention relates to particulate entity, such as a nanoparticle or conjugate, for use in particular as adjuvant in vaccine or immunotherapy. More specifically, the invention relates to a particulate entity comprising: iv. an iNKT cell agonist such as &alpha Gal Car compound, and, v. one or more antigenic determinant(s) such as a tumour antigen(s) or pathogen-derived antigen(s), vi. a targeting agent that targets in vivo said iNKT cell agonist to dendritic cells, such as human BDCA3+ dendritic cells.
