Formulations for non-invasive delivery of active proteins to an animal or human
This invention relates to formulations which contain at least one active peptide intended to be used for prevention or treatment of a condition in an animal or human. Said active peptide has been expressed in a system that improves the conservation of those properties essential to the prophylactic or therapeutic effect of said peptide before and after delivery to an animal or human and until the peptide delivers its activity at the effector site within said animal or human. The invention is particularly relevant to formulations of oral or mucosal vaccines or biopharmaceuticals. The active peptide of the formulation is recombinantly expressed in cells or whole animals. In a preferred embodiment of this invention the active polypeptide of the formulation has been recombinantly expressed in insect cells or whole insect larvae.
1. A formulation for delivery of a pharmaceutically active agent to an animal or human comprising:
a heterologous peptide, wherein said heterologous peptide comprises a first peptide sequence and a second peptide sequence,
wherein said first peptide sequence is linked to said second peptide sequence,
wherein said first peptide sequence promotes the fusion of said second peptide sequence to lipid membranes, and
wherein said first peptide sequence is a lipid-droplet targeting sequence comprising SEQ ID NO:1.
2. The formulation according to claim 1 , wherein said second peptide sequence is selected from the group consisting of immunogenic peptides and glycopeptides, wherein said immunogenic peptides and glycopeptides are able to induce an immune response against pathogens in an animal or human.
3. The formulation according to claim 1 , wherein said second peptide sequence is a bioactive peptide or a glycopeptide that is able to induce a prophylactic or therapeutic effect on an animal or human condition.
4. A method of preparing the formulation according to claim 1 , comprising:
growing host cells or host organisms under conditions that allow expression of the heterologous peptide;
harvesting said host cells or host organisms, or taking a sample from a culture media used for growing said host cells or taking a sample from said host organism; and
preparing a clarified homogenate or crude extract.
5. The method according to claim 4 , wherein the host cells or host organisms are insect cells, insect larvae or insect pupae.
6. The method according to claim 4 , comprising infecting the host cells or host organisms with a recombinant baculovirus; and expressing the heterologous peptide.
7. The method according to claim 5 , wherein the host organisms are insect larvae of a species selected from the group consisting of Trichoplusia ni, Spodoptera frugiperda, Spodoptera exigua, Autographa gamma, Peridroma saucia, Noctua pronuba, Aporophyla nigra, Hoplodrina ambigua, Xestia xantographa, Agrotis puta , and Agrotis segetum.
8. A method for eliciting an immunological response in an animal or human comprising administering to the animal or human the formulation prepared according to claim 4 .
9. A method for delivery of a pharmaceutically active agent to an animal or human comprising administering to the animal or human the formulation prepared according to claim 4 .