PMID- 2384160 OWN - NLM STAT- MEDLINE DCOM- 19900920 LR - 20220317 IS - 0014-5793 (Print) IS - 0014-5793 (Linking) VI - 268 IP - 1 DP - 1990 Jul 30 TI - Amphipathic polyethyleneglycols effectively prolong the circulation time of liposomes. PG - 235-7 AB - Incorporation of dioleoyl N-(monomethoxy polyethyleneglycol succinyl)phosphatidylethanolamine (PEG-PE) into large unilamellar liposomes composed of egg phosphatidylcholine:cholesterol (1:1) does not significantly increase the content leakage when the liposomes are exposed to 90% human serum at 37 degrees C, yet the liposomes show a significant increase in the blood circulation half-life (t1/2 = 5 h) as compared to those without PEG-PE(t1/2 less than 30 min). The PEG-PE's activity to prolong the circulation time of liposomes is greater than that of the ganglioside GM1, a well-described glycolipid with this activity. Another amphipathic PEG derivative, PEG stearate, also prolongs the liposome circulation time, although its activity is less than that of GM1. Amphipathic PEGs may be useful for the sustained release and the targeted drug delivery by liposomes. FAU - Klibanov, A L AU - Klibanov AL AD - Department of Biochemistry, University of Tennessee, Knoxville 37996-0840. FAU - Maruyama, K AU - Maruyama K FAU - Torchilin, V P AU - Torchilin VP FAU - Huang, L AU - Huang L LA - eng GR - AI 25834/AI/NIAID NIH HHS/United States GR - CA 24553/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - FEBS Lett JT - FEBS letters JID - 0155157 RN - 0 (Liposomes) RN - 3WJQ0SDW1A (Polyethylene Glycols) SB - IM MH - Animals MH - Humans MH - In Vitro Techniques MH - Liposomes/*pharmacokinetics MH - Liver/metabolism MH - Male MH - Metabolic Clearance Rate MH - Mice MH - Mice, Inbred BALB C MH - Permeability MH - *Polyethylene Glycols MH - Spleen/metabolism EDAT- 1990/07/30 00:00 MHDA- 1990/07/30 00:01 CRDT- 1990/07/30 00:00 PHST- 1990/07/30 00:00 [pubmed] PHST- 1990/07/30 00:01 [medline] PHST- 1990/07/30 00:00 [entrez] AID - 0014-5793(90)81016-H [pii] AID - 10.1016/0014-5793(90)81016-h [doi] PST - ppublish SO - FEBS Lett. 1990 Jul 30;268(1):235-7. doi: 10.1016/0014-5793(90)81016-h.