Fusogenic liposomes prepared with polyethyleneglycol-lipid

J. Sunamoto, K. Tanaka, T. Saito, K. Akiyoshi, T. Sato

研究成果: Conference article査読


Liposomes have been widely accepted in biotechnology and medicine as a vehicle for the delivery into cells of various substances, eg. DNA, RNA, enzymes, or drugs. In order for biologically unstable compounds to be internalized into cells, fusion is favored because the liposome-loading compounds are directly delivered into the cytosol and able to avoid destruction by lysosomal enzymes. From this point of view, we have developed a fusogenic liposome, which contains an artificial lipid, polyethyleneglycol-lipid (PEG-lipid) or polyethyleneglycol-substituted cholesterol (PEG-chol). The fusogenicity of these functionalized liposomes to carrot protoplasts and human lymphocytes was investigated. Egg PC liposomes with 23 Mole% PEG-lipid (n = 11) were the most effective in fusing with carrot protoplasts. The fusogenicity of PEG-chol containing liposomes was significantly less. The difference in the fusogenicity between the two liposomes is ascribed to the difference in hydration capacity and fluidity of liposomal membranes. In the case of human lymphocytes, fusion was observed only at 4.0 °C, and endocytosis occurred at 37°C.

ジャーナルPolymeric Materials Science and Engineering, Proceedings of the ACS Division of Polymeric Materials Science and Engineering
出版ステータスPublished - 1991
イベントProceedings of the American Chemical Society, Spring Meeting - Atlanta, GA, USA
継続期間: 1991 4月 151991 4月 19

ASJC Scopus subject areas

  • 化学工学(その他)
  • ポリマーおよびプラスチック


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