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Critical Reviews™ in Therapeutic Drug Carrier Systems
インパクトファクター: 2.9 5年インパクトファクター: 3.72 SJR: 0.736 SNIP: 0.551 CiteScore™: 2.43

ISSN 印刷: 0743-4863
ISSN オンライン: 2162-660X

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Critical Reviews™ in Therapeutic Drug Carrier Systems

DOI: 10.1615/CritRevTherDrugCarrierSyst.v18.i6.40
16 pages

In Vivo Applications of PEG Liposomes: Unexpected Observations

Peter Laverman
Department of Nuclear Medicine, University Medical Center Nijmegen, Nijmegen, The Netherlands
Otto C. Boerman
Department of Nuclear Medicine, University Medical Center Nijmegen, Nijmegen, The Netherlands
Wim J. G. Oyen
Department of Nuclear Medicine, University Medical Center Nijmegen, Nijmegen, The Netherlands
Frans H. M. Corstens
Department of Nuclear Medicine, University Medical Center Nijmegen, Nijmegen, The Netherlands
Gert Storm
Utrecht Institute for Pharmaceutical Science, Utrecht University, Utrecht, The Netherlands

要約

Recent studies with PEG liposomes in patients have consistently shown that liposomes can induce side effects (flushing, tightness of the chest). Furthermore, the blood clearance of PEG liposomes was shown to be dose-dependent: at lipid doses lower than 1 mmol/kg, PEG liposomes do not show the long-circulation property but instead are cleared relatively rapidly from the bloodstream. Another remarkable observation was that repeated injections of PEG liposomes led to significant pharmacokinetic changes: the circulatory half-life of a second dose of radiolabeled PEG liposomes dramatically decreased when given from 5 days to up to 4 weeks after a first injection. In these three unexpected phenomena, proteins of the complement system seem to play a key role.Therefore, one has to consider that PEG liposomes are not inert drug-carrying vehicles in vivo. Pharmacological effects can occur, induced solely by using liposomal particles irrespective of the drug content.


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