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: The disclosed invention involves creating coatings on liposomes to increase stability within the body for drug delivery. The present invention includes a composition used for drug delivery, comprising liposomes and hydrophobically modified polysaccharides with alkyl groups, wherein the alkyl groups physically attach to and coat the liposomes.