Abstract: Chlamydiae are intracellular bacterial pathogens responsible for a variety of infections. The inventors produced an antibody that is directed against a surface antigen (i.e., CD40) of an antigen presenting cell (i.e., dendritic cell) wherein the heavy chain and/or light chain is conjugated to the MOMP VS4 domain of Chlamydia trachomatis for its use as vaccine.

Abstract: Chlamydiae are intracellular bacterial pathogens responsible for a variety of infections. The inventors have set up candidate vaccines against Chlamydia trachomatis. In particular, the inventors have identified specific epitopes to be included in vaccine candidates thanks to in silico analysis of the amino-acid sequence of these proteins to map predicted MHC-I and -II epitopes by online software (NetMHC-4.0 and NetMHCII-2.3) and peptide binding prediction software. B cell epitopes were also mapped using online software (BepiPred-2.0 and Discotope). Finally, the inventors have generated some specific CD40 or Langerin antibodies comprising one or more identified epitope(s) of the present invention and that are suitable for vaccine purposes. Therefore, the present invention relates to Chlamydia trachomatis (Ct) antigenic polypeptides and uses thereof for vaccine purposes.

Abstract: SARS-CoV-2 vaccines will be essential to reduce morbidity and mortality. The inventors produced an antibody that is directed against a surface antigen (i.e. CD40) of an antigen presenting cell (i.e. dendritic cell) wherein the heavy chain was conjugated to the receptor-binding domain of the Sars-Cov-2 spike protein for its use as vaccine. In particular, the inventors show that said vaccine induces circulating Ab-secreting hu-B cells, elicits S-specific IgG+ hu-B cells, elicits the expansion of central memory CD4+ hu-T cells and the emergence of effector memory CD4+ T cells, elicits the expansion of central memory CD8+ hu-T cells at and the emergence of effector memory CD8+ T cells at and finally induces Stem-cell like memory hu-CD8+ T cells.