Abstract: Immunoprotective primary mesenchymal stems cells (IP-MSC) which episomally express immunoreactive polypeptides that specifically target a pathogen (e.g., an infectious species of virus, bacterium, or parasite) or toxin are described herein. The immunoreactive polypeptides can be, e.g., full antibodies, single-chain antibodies (ScFV), Fab or F(ab)2 antibody fragments, diabodies, tribodies, and the like). Optionally IP-MSC are trasfected to express one or more other immunomodulating polypeptides, e.g., a cytokine such as an interleukin (e.g., IL-2, IL-4, IL-6, IL-7, IL-9, and IL-12), an interferon (e.g., IFN?, IF?, or IFN?), and the like, which can enhance the effectiveness of the immunoreactive polypeptides.

Abstract: Immunogenic influenza hemagglutinin-derived peptide compositions described herein induce a specific therapeutic antibody response against influenza virus. The immunogenic peptide compositions comprise a segment from the fusion initiation region (FIR) domain of an influenza hemagglutinin protein bound to an immunogenic carrier protein, such as an influenza hemagglutinin (HA) protein (i.e., full length HA), and the like. The immunogenic peptide compositions described herein can be utilized to treat or prevent influenza infection and to prepare influenza-specific therapeutic antibodies that interfere with influenza virus-host cell membrane fusion.

Abstract: Immunogenic influenza hemagglutinin-derived peptide conjugates described herein induce a specific therapeutic antibody response against influenza virus. The immunogenic peptide conjugates comprise a segment from the fusion initiation region (FIR) domain of an influenza hemagglutinin protein conjugated to an immunogenic carrier protein, such asbovine serum albumin (BSA), an influenza hemagglutinin (HA) protein (i.e., full length HA), and the like. The immunogenic peptide conjugates described herein can be utilized to treat or prevent influenza infection and to prepare influenza-specific therapeutic antibodies that interfere with influenza virus-host cell membrane fusion. The peptide conjugates can be formulated in pharmaceutical compositions useful for broad spectrum treatment or prevention of influenza infections.

Abstract: Immunoprotective primary mesenchymal stems cells (IP-MSC) which episomally express multiple immunoreactive polypeptides that specifically target a pathogen (e.g., an infectious species of virus, bacterium, or parasite) or toxin are described herein. The IP-MSC express two or more (e.g., 2 to about 100) immunoreactive polypeptides (e.g., full antibodies, single-chain antibodies (ScFV), Fab or F(ab)2 antibody fragments, diabodies, tribodies, and the like), and optionally one or more other immunomodulating polypeptides, e.g., a cytokine such as an interleukin (e.g., IL-2, IL-4, IL-6, IL-7, IL-9, and IL-12), an interferon (e.g., IFN?, IFN?, or IFN?), and the like, which can enhance the effectiveness of the immunoreactive polypeptides.

Abstract: Immunogenic influenza hemagglutinin-derived peptide conjugates described herein induce a specific therapeutic antibody response against influenza virus. The immunogenic peptide conjugates comprise a segment from the fusion initiation region (FIR) domain of an influenza hemagglutinin protein conjugated to an immunogenic carrier protein, such as keyhole limpet hemocyanin (KLH), bovine serum albumin (BSA), an influenza hemagglutinin (HA) protein (i.e., full length HA), and the like. The immunogenic peptide conjugates described herein can be utilized to treat or prevent influenza infection and to prepare influenza-specific therapeutic antibodies that interfere with influenza virus-host cell membrane fusion. The peptide conjugates can be formulated in pharmaceutical compositions useful for broad spectrum treatment or prevention of influenza infections.