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- W2046772334 endingPage "323" @default.
- W2046772334 startingPage "295" @default.
- W2046772334 abstract "Immunoliposomes able to bind specifically to target cells and to release their encapsulated contents upon brief heating were prepared. Monoclonal anti-H2Kk was covalently derivatized with palmitic acid by the method of Huang, A. et al. (Huang, A., Tsao, Y.S., Kennel, S.J. and Huang, L. (1982) Biochim. Biophys. Acta 716, 140–150). The palmitoyl antibody was injected at a controlled rate into a suspension of fused unilamellar dipalmitoylphosphatidylcholine liposomes maintained at a constant temperature. The final protein-to-lipid ratio of the resultant liposomes with incorporated antibody (immunoliposomes) was dependent upon the rate of antibody injection and the lipid concentration. Injection of palmitoyl antibody into a liposome suspension containing 50 mM carboxyfluorescein at 41°C resulted in simultaneous antibody incorporation and entrapment of dye. Immunoliposomes were able to release the entrapped carboxyfluorescein upon heating. The release of dye at temperatures between the pre- and main-transition temperatures of DPPC was abolished by the addition of calf serum (5%). Furthermore, the presence of serum resulted in an increase in the temperature of the maximal release rate and also in the rate of release at that temperature. Retention of antigen-binding capacity was demonstrated by the ability of the immunoliposomes to bind specifically to the target cells. Rapid release of entrapped carboxyfluorescein from immunoliposomes bound to target cells at 4°C was achieved upon brief exposure (less than 3 min) at 41°C. These heat-sensitive immunoliposomes may be useful in enhancing drug delivery to target cells." @default.
- W2046772334 created "2016-06-24" @default.
- W2046772334 creator A5031408853 @default.
- W2046772334 creator A5063672862 @default.
- W2046772334 date "1983-01-01" @default.
- W2046772334 modified "2023-09-23" @default.
- W2046772334 title "Targeting to lymphoid cells of the immune network" @default.
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