Targeted polymerized liposome diagnostic and treatment agents

Abstract

Polymerized liposome particles which are linked to a targeting agent and may also be linked to a contrast enhancement agent and/or linked to or encapsulating a treatment agent. The targeting imaging enhancement polymerized liposome particles interact with biological targets holding the image enhancement agent to specific sites providing in vitro and in vivo study by magnetic resonance, radioactive, x-ray or optical imaging of the expression of molecules in cells and tissues during disease and pathology. Targeting polymerized liposomes may be linked to or encapsulate a treatment agent, such as, proteins, drugs or hormones for directed delivery to specific biological sites for treatment.

What is claimed is:  
     
         1 . A functional lipid having an active hydrophilic head group linked by a bifunctional linker portion to a liposome forming lipid with a hydrophobic tail group having a polymerizable functional group.  
     
     
         2 . A functional lipid according to  claim 1  wherein said hydrophilic head group comprises a lanthanide-diethylenetriamine pentaacetic acid chelate and said variable length linker group is selected from the group consisting of bifunctional aliphatic compound and bifunctional aromatic compound.  
     
     
         3 . A functional lipid according to  claim 1  wherein said hydrophilic head group comprises a lanthanide-diethylenetriamine pentaacetic acid chelate and said linker group is selected from the group consisting of polyethylene glycol, propylene glycol and polyglycine.