Controlling the Physical Behavior and Biological Performance of Liposome Formulations Through Use of Surface Grafted Poly(ethylene Glycol)
| Autor: | N. Dos Santos, Lawrence D. Mayer, Wai Ming Li, Gigi N.C. Chiu, Murray S. Webb, Christine Allen, Ryan C. Gallagher, Sharon Johnstone, Marcel B. Bally, Y. Shu, Andrew S. Janoff |
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| Rok vydání: | 2002 |
| Předmět: |
Surface Properties
Biophysics macromolecular substances Plasma protein binding Biochemistry Polyethylene Glycols Mice Structure-Activity Relationship chemistry.chemical_compound PEG ratio Animals Humans Organic chemistry Molecular Biology chemistry.chemical_classification Liposome technology industry and agriculture Blood Proteins Cell Biology Polymer Opsonin Proteins In vitro Models Chemical Solubility chemistry Liposomes Drug delivery Adsorption Pharmaceutical Vehicles Hydrophobic and Hydrophilic Interactions Ethylene glycol Half-Life Protein Binding Protein adsorption |
| Zdroj: | Bioscience Reports. 22:225-250 |
| ISSN: | 1573-4935 0144-8463 |
| DOI: | 10.1023/a:1020186505848 |
| Popis: | The presence of poly(ethylene glycol) (PEG) at the surface of a liposomal carrier has been clearly shown to extend the circulation lifetime of the vehicle. To this point, the extended circulation lifetime that the polymer affords has been attributed to the reduction or prevention of protein adsorption. However, there is little evidence that the presence of PEG at the surface of a vehicle actually reduces total serum protein binding. In this review we examine all aspects of PEG in order to gain a better understanding of how the polymer fulfills its biological role. The physical and chemical properties of the polymer are explored and compared to properties of other hydrophilic polymers. An evidence based assessment of several in vitro protein binding studies as well as in vivo pharmacokinetics studies involving PEG is included. The ability of PEG to prevent the self-aggregation of liposomes is considered as a possible means by which it extends circulation longevity. Also, a “dysopsonization” phenomenon where PEG actually promotes binding of certain proteins that then mask the vehicle is discussed. |
| Databáze: | OpenAIRE |
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