Mymetics Corporation

Institut National De La Sante Et De La Recherche Medicale

Catalent U.k. Swindon Zydis Limited

Pevion Biotech Ltd.

Inserm

Sylvain Fleury

Morgane Bomsel

Yik Teng Wong

Mario Amacker

Nicolas Mouz

Charli Smardon

Khojasteh Shirkhani

Antonius Johannes Hendrikus Stegmann

Marie-Gaëlle Roger

Rinaldo Zurbriggen

Pierre-François Serres

Marc P Girard

Marie-Gaelle Roger

The present disclosure is directed to oral vaccine dosage forms and processes for producing the oral vaccine dosage forms. The dosage forms include lipid-based vesicles (e.g., virosomes, liposomes) harboring an immunogenic amount of at least one vaccinal target molecule, with or without adjuvant. Specifically, Applicants discovered a combination of the composition of the liquid virosome concentrates, the composition of the base matrix for the solid dosage form formulation (excluding the virosome concentrate), and the manufacturing conditions for the dosage forms that can produce a freeze dried sublingual dosage form having physical robustness, particle and antigen integrity and stability.

Oral dispersible vaccine comprising virosomes

The present invention relates to a virosome-like vesicle comprising at least a gp41-derived antigen or an analogue thereof, said gp41-derived antigen being located to the external surface of and/or encapsulated inside said vesicle and being in a convenient configuration for conferring said virosome-like vesicle with an ability to induce an immune response against a gp41 protein or a human immunodeficiency virus (HIV).

Virosome-like vesicles comprising gp41-derived antigens

The present invention deals with a modified polypeptide comprising three contiguous segments N, L and C represented by the formula N-L-C and comprising: a N-helix region of gp41 (N), a C-helix region of gp41 (C), and a connecting loop comprising a synthetic linker (L) between the N and C-helices, the linker replacing amino acids 593-617 of gp41, the numbering scheme being based upon the prototypic isolate HIV-1 HxB2 Clade B strain, said polypeptide comprising the calveolin-1 neutralizing and 98.6 D epitopes, but not 2F5 and 4E10 epitopes, not the fusion peptide, the polypeptide having a minimal immunogenic cross-reactivity with human interleukin 2 (IL2).

Gp41 antigens

The present invention deals with a method for therapeutic or prophylactic treatment of HIV, in particular a prophylactic vaccinal method, comprising at least: administering to a patient a first antigen comprising the broadly neutralizing epitopes of the Membrane Proximal Ectodomain Region (MPER) of gp41, and administering to the same patient a second antigen comprising a modified polypeptide comprising three contiguous segments N, L and C represented by the formula N-L-C and comprising: a N-helix region of gp41(N), a C-helix region of gp41(C), and a connecting loop comprising a synthetic linker (L) between the N and C-helices, the linker replacing amino acids 593-617 of gp41, the numbering scheme being based upon the prototypic isolate HIV-1 HxB2 Clade B strain, said polypeptide comprising the calveolin-1 neutralizing and 98.6 D epitopes, but not 2F5 and 4E10 epitopes, not the fusion peptide, the polypeptide having a minimal immunogenic cross-reactivity with human interleukin 2.

Splitting GP41

The present invention concerns a modified polypeptide containing at least an immunodominant region and the connecting loop between N- and C-helices of gp41 ectodomain of HIV-1, wherein the connecting loop includes at least a linker fragment having: &#x2014;a size convenient for keeping the native conformation of the interaction between N- and C-helices, and &#x2014;an hydrophily sufficient to provide a soluble and stable trimeric form to said modified polypeptide.

Soluble and stabilized trimeric form of gp41 polypeptides

Growing community of inventors

Bottens, Switzerland

Sylvain Fleury