The present invention relates to a composition comprising Epstein-Barr Virus (EBV) particles for use in vaccination of a subject, wherein said EBV particles comprise a significantly reduced chromosome instability-inducing EBV polypeptide activity. The present invention also relates to a composition comprising EBV particles for use in vaccination of a subject, wherein said vaccination comprises avoiding contacting the cytosol and/or nucleus of cells of said subject with a chromosome instability-inducing EBV polypeptide activity. Moreover, the present invention relates to polynucleotides, host cells, methods, and uses related to the aforesaid compositions.

The present inaveation relates to prophylactic and/or therapeutic vaccines thatpoatairj Newcastle disease Virus (NDV) virus-like particles (VLPs) comprising one or more Epstein-Barr Virus (EBV) antigens, in one embodiment, the invention provides a recombinant virus-like particle (V'UP) comprising, i is operable combination, a) Newcastle disease virus iNDVj matrix (M) protein, and b) one or more Epstein-Barr Virus (BBV) antigens. The im'eniion's prophylactic and/or therapeutic vacclrses are useful for preventing asc/or treatmg, infection with EBY aixi/or disease associated Epstein-Barr Virus, such as cancer.

The present invention relates to a vaccine comprising a particle, said particle comprising (i) at least one Epstein-Barr virus (EBV) structural polypeptide, (ii) at least one EBV lytic polypeptide, (iii) membrane lipids, said particle being devoid of EBV DNA, wherein (a) the B-cell transformation capacity of one or more EBV polypeptides required for B-cell transformation as comprised in said particle is disabled while their immunogenicity is maintained; and or (b) said particle is devoid of one or more EBV polypeptides required for B-cell transformation. Furthermore, the invention relates to a method for generating a particle, to a cell obtained in the method of the invention, a kit comprising the vaccine or the particle generated according in the method of the invention. Also, the invention relates to the use of the vaccine or the particle generated according to the method of the invention for generating CD8+ cells specific for an EBV antigen.

Disclosed is a self-assembled nanoparticle containing a gHgL protein of an EB virus, a preparation method and use thereof. The self-assembled nanoparticle comprises a first polypeptide and a second polypeptide, wherein the first polypeptide comprises a gHgL protein and a first vector subunit, and the second polypeptide comprises a second vector subunit; the first vector subunit is 153-50A1, and the second vector subunit is 153-50B.4PT1; and the gHgL protein is linked to the first vector subunit through a linker. The gHgL protein of the EB virus is displayed on a surface of the self-assembled nanoparticle for the first time. The self-assembled nanoparticle has a larger particle size than the antigen (gHgL), a better antigen residence volume, and a thermal stability comparable to the antigen (gHgL). Moreover, since a larger number of gHgLs are displayed, the self-assembled nanoparticle can strongly stimulate more B cells and induce higher antibody titer.

Disclosed are vaccine compositions comprising a VLP comprising two or more EBV envelope glycoproteins and one or more T cell antigens and methods of preventing or treating EBV infections using the vaccine compositions. Also disclosed is an expression system or a single expression vector for co-expressing two or more EBV envelope glycoproteins simultaneously to generate a VLP vaccine. The expression system may include a single vector inserted with two or more nucleic acid sequences that encode two or more EBV envelope glycoproteins linked by one or more linking sequences such that the EBV envelope glycoproteins are co-expressed simultaneously.

The present invention relates to prophylactic and/or therapeutic vaccines that contain Newcastle disease virus (NDV) virus-like particles (VLPs) comprising one or more Epstein-Barr Virus (EBV) antigens. In one embodiment, the invention provides a recombinant virus-like particle (VLP) comprising, in operable combination, a) Newcastle disease virus (NDV) matrix (M) protein, and b) one or more Epstein-Barr Virus (EBV) antigens. The invention's prophylactic and/or therapeutic vaccines are useful for preventing and/or treating infection with EBV and/or disease associated Epstein-Barr Virus, such as cancer.

Disclosed are vaccine compositions comprising a VLP comprising two or more EBV envelope glycoproteins and one or more T cell antigens and methods of preventing or treating EBV infections using the vaccine compositions. Also disclosed is an expression system or a single expression vector for co-expressing two or more EBV envelope glycoproteins simultaneously to generate a VLP vaccine. The expression system may include a single vector inserted with two or more nucleic acid sequences that encode two or more EBV envelope glycoproteins linked by one or more linking sequences such that the EBV envelope glycoproteins are co-expressed simultaneously.

The present invention provides herpesviruses, such as EBV, which lack at least one viral miRNA. Such herpesviruses lacking at least one viral miRNA are advantageously not capable of packaging their genome into the capsid, thereby producing HVLPs, which are substantially free of their herpesvirus genome or the nucleic acid molecule encoding the proteinaceous part of the HVLP and viral miRNA. Such HVLPs may be used as vaccine.