Abstract: A method of quantitating the activity of a selected protein kinase on a peptide substrate is provided. The peptide substrate is conjugated to a binding compound. The modified peptide substrate is then added to a solution containing the selected protein kinase. The protein kinase and the peptide are incubated along with a label for sufficient time to form a modified peptide product having the binding compound and the label. The modified peptide product is then bound to a matrix having a high binding compound affinity. The bound peptide is then washed and the activity of the protein kinase is measured. Also provided is a kit for the stated method.

Abstract: The present invention relates to the delivery of biologically active molecules, such as peptides, nucleic acids and therapeutic agents, into the interior of cells by administering to the cells a complex comprising the molecule linked to an importation competent signal peptide. Such delivery can be utilized for purposes such as peptide therapy, gene transfer, and antisense therapy.

Abstract: A method of liposome-based therapy for a mammalian subject is disclosed. The method uses liposomes with outer surfaces that contain an affinity moiety effective to bind specifically to a biological surface at which the therapy is aimed, and a hydrophilic polymer coating effective to shield the affinity moiety from interaction with the target surface. The hydrophilic polymer coating is made up of polymer chains covalently linked to surface lipid components in the liposomes through releasable linkages. After a desired liposome biodistribution is achieved, a releasing agent is administered to cause cleaving of a substantial portion of the releasable linkages in the liposomes, to expose the affinity agent to the target surface.

Abstract: A novel plasmid has inserted therein the cDNA for prostaglandin synthase. The present invention further provides a method of increasing prostanoid production in vivo including the general steps of delivering a prostaglandin synthase gene to cells in vivo and hyperexpressing the gene to enhance prostanoid production in the cells.