A nucleic acid including (i) a sequence of a S gene coding for a Spike protein and (ii) a sequence coding for a pilot peptide which interacts with ESCRT proteins. Also, extracellular vesicles, in particular exosomes, harboring at their external surface a Spike protein, obtainable by transfecting cells with the nucleic acid. Further, a method of immunizing a subject against a virus of the Orthocoronavirinae subfamily, in particular against SARS-CoV-2, by DNA prime-protein boost using the nucleic acid and the extracellular vesicles of the invention.

[Problem to be Solved] The object of the present invention is to develop a method of regulating a target RNA. [Solution] There is provided a fusion protein comprising a functional domain which improves the protein expression level from mRNA and a PPR protein which can bind to a target mRNA in an RNA base-selective or RNA base sequence-specific manner.

The invention provides chimeric proteins and nucleic acids encoding these which can be used to generate vaccines against selected antigens. In one aspect, a chimeric protein comprises an antigen sequence and a domain for trafficking the protein to an endosomal compartment, irrespective of whether the antigen is derived from a membrane or non-membrane protein. In one preferred aspect, the trafficking domain comprises a lumenal domain of a LAMP polypeptide. Alternatively, or additionally, the chimeric protein comprises a trafficking domain of an endocytic receptor (e.g., such as DEC-205 or gp200-MR6). The vaccines (DNA, RNA or protein) can be used to modulate or enhance an immune response against any kind of antigen. In one preferred aspect, the invention provides a method for treating a patient with cancer by providing a chimeric protein comprising a cancer-specific antigen or a nucleic acid encoding the protein to the patient.

Provided are methods of generating an immune response to any of various antigens including foreign antigens such as infectious agent antigens. In general, the method comprises administering an expression vector encoding a transcription unit encoding a secretable fusion protein, the fusion protein containing the foreign antigen and CD40 ligand and also administering the encoded fusion protein. In another approach, an immune response to the foreign antigen is elicited using the encoded fusion protein without administering the vector. The invention methods may be used to immunize an individual against an infectious agent such as influenza virus. Methods of obtaining an immune response in older individuals also is described.

Composition comprising synthetic membrane-receiver complexes, methods of generating synthetic membrane-receiver complexes, and methods of treating or preventing diseases, disorders or conditions therewith.

Compositions and methods are presented for prevention and/or treatment of a coronavirus disease wherein the composition comprises a recombinant entity. The recombinant entity comprises a nucleic acid that encodes a nucleocapsid protein of coronavirus 2 (CoV2); and/or wherein the recombinant entity encodes a spike protein of CoV2.

An ACE2-Fc hybrid construct is used as a therapeutic and/or analytic entity to treat an individual infected with a coronavirus or to detect a coronavirus in an analyte. In selected embodiments, the Fc portion of the hybrid construct is an IgA Fc portion, and in still further embodiments the ACE2 portion has a mutation that reduces or abolishes ACE2 catalytic activity.

Provided herein are improved gene therapy vectors and methods of use, in some embodiments, comprising sequences for improved expression and cellular targeting of a therapeutic protein.

[Problem] To provide a nucleic acid expected to be useful for treating mite allergy.

[Means to be solved] Provided is a nucleic acid comprising a nucleotide sequence encoding a chimeric protein, wherein the nucleic acid comprises a nucleotide sequence encoding a signal peptide, a nucleotide sequence encoding an intra-organelle stabilizing domain of LAMP, a nucleotide sequence encoding an allergen domain comprising Der p 1, Der p 2, Der p 23, and Der p 7, a nucleotide sequence encoding a transmembrane domain and a nucleotide sequence encoding an endosomal/lysosomal targeting domain of LAMP in this order.

[Problem] To provide a nucleic acid expected to be useful for treating crustacean allergy.

[Means to be solved] Provided is a nucleic acid comprising a nucleotide sequence encoding a chimeric protein, wherein the nucleic acid comprises a nucleotide sequence encoding a signal peptide, a nucleotide sequence encoding an intra-organelle stabilizing domain of LAMP, a nucleotide sequence encoding an allergen domain comprising Lit v 1, Lit v 4, and Lit v 3, a nucleotide sequence encoding a transmembrane domain and a nucleotide sequence encoding an endosomal/lysosomal targeting domain of LAMP in this order.