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

研究成果: Article査読

21 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)211-218
ページ数8
ジャーナルJournal of Controlled Release
97
2
DOI
出版ステータスPublished - 2004 6 18
外部発表はい

ASJC Scopus subject areas

  • Pharmaceutical Science

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