0X26-conjugated liposomes

Gosk, S., et al. 2004. Targeting anti-transferrin receptor antibody (0X26) and OX26-conjugated liposomes to brain capillary endothelial cells using in situ perfusion. J Cereb Blood Flow Metab 24 1193. 

Free daunomycin and not PEG-conjugated hposomes containing daunomycin, disappear rapidly from the circulation. Plasma clearance of the hposome was reduced 66-fold by PEG-conjugation. Coupling 29 0X26 monoclonal antibodies per PEG-liposome partially reversed the effect of PEG-conjugation on plasma clearance. 

Plasma clearance (Cl), blood-brain barrier permeability surface area product (PS) and accumulation as % injected dose detected in brain tissue (%ID tissue) at 1 h after administration. Results show free [ H]-daunomycin (Daunomycin), [ H]-daunomycin encapsulated in conventional liposomes (Liposomes), sterically stabilized liposomes (PEG-liposomes), immunoliposomes (29 0X26, where 29 designates the number of 0X26 mAb conjugated per liposome) and control immunoliposomes where the 0X26 mAb was replaced by a non-specific isotype control antibody (IgG2a). Values are means SEM of n = 3 experiments. 

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