Prednisolone retention in integrated liposomes by chemical approach and pharmaceutical approach

Mugen Teshima, Shigeru Kawakami, Koyo Nishida, Junzo Nakamura, Toshiyuki Sakaeda, Hideyuki Terazono, Takashi Kitahara, Mikiro Nakashima, Hitoshi Sasaki*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


The purpose of this study is to demonstrate a stable retention of prednisolone (PLS) in the unique liposomes integrated by lipophilic derivative approach and PEGylation approach. Palmitoyl prednisolone (Pal-PLS) was newly synthesized and used as a lipophilic derivative. The liposomes were composed of egg phosphatidylcholine (EggPC)/cholesterol (Chol) and L-α- distearoylphosphatidylcholine (DSPC)/Chol with or without L-α- distearoylphosphatidylethanolamine-polyethylene glycol 2000 (DSPE-PEG 2000) or -PEG 5000 (DSPE-PEG 5000). The retentions of PLS and Pal-PLS in the various liposomes were examined by ultrafiltration and gel filtration. Although PLS showed high trapping efficiency by all liposomes after ultrafiltration, low incorporation efficiency was observed in gel filtration. It indicates that PLS was released from the liposomes by a dilution with elution medium in gel filtration. Pal-PLS showed high incorporation into all liposomes after both ultrafiltration and gel filtration. The high incorporation of Pal-PLS into EggPC/Chol liposomes, however, was reduced by incubation with rat plasma in gel filtration. The reducing effect of rat plasma on drug incorporation into liposomes was inhibited by using DSPC and DSPE-PEGs. Thus, we systemically examined the drug retention in various liposomes and demonstrated the high retention of PLS in the liposomes integrated by lipophilic derivative approach and pharmaceutical approach using special lipids.

Original languageEnglish
Pages (from-to)211-218
Number of pages8
JournalJournal of Controlled Release
Issue number2
Publication statusPublished - 2004 Jun 18
Externally publishedYes


  • Drug delivery system
  • Lipophilic derivative
  • Liposomes
  • Polyethylene glycol
  • Prednisolone

ASJC Scopus subject areas

  • Pharmaceutical Science


Dive into the research topics of 'Prednisolone retention in integrated liposomes by chemical approach and pharmaceutical approach'. Together they form a unique fingerprint.

Cite this