Light- and temperature-responsive liposomes incorporating cinnamoyl Pluronic F127.
Light- and temperature-responsive liposomes were prepared by immobilizing cinnamoyl Pluronic F127 (CP F127) on the surface of egg phosphatidylcholine liposomes. CP F127 was prepared by a condensation reaction, and the molar ratio of cinnamoyl group to Pluronic F127 was calculated to be 1:1.4 on (1)H NMR spectrum. The cinnamoyl group of CP F127 was readily dimerized under the irradiation of a UV light (254 nm, 6 W). CP F127 decreased the absolute value of the zeta potential of liposome possibly because it can shift the hydrodynamic plane away from the liposome surface. The size of liposome decorated with CP F127, measured on a dynamic light scattering machine and observed on a TEM, was larger than that of bare liposome. The liposome bearing CP F127 seemed to fuse and aggregate each other. The liposome released calcein, a fluorescence dye, in response to a UV irradiation, possibly because the photo-dimerization of cinnamoyl group perturbs the liposomal membrane. Moreover, the liposome released the dye in response to a temperature change, possible due to the phase transition of Pluronic F127 layer on the liposomal surface or the hydrophobic interaction of the polymer with liposomal membrane.
College of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, 192-1, Hyoja 2 dong, Chunchon, Kangwon-do 200-701, Republic of Korea.
MinHui
M
Wang
College of Biomedical Science and Institute of Bioscience and Biotechnology, Kangwon National University, 192-1, Hyoja 2 dong, Chunchon, Kangwon-do 200-701, Republic of Korea. Electronic address: jinkim@kangwon.ac.kr.
Jin-Chul
JC
Kim
D002626:Chemistry, Pharmaceutical; D002934:Cinnamates / Q000737:chemistry / Q000528:radiation effects*; D019281:Dimerization; D016503:Drug Delivery Systems; D005452:Fluoresceins / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D007700:Kinetics; D008081:Liposomes; D046529:Microscopy, Electron, Transmission; D010316:Particle Size; D010713:Phosphatidylcholines / Q000737:chemistry / Q000528:radiation effects*; D010777:Photochemistry; D020442:Poloxamer / Q000031:analogs & derivatives* / Q000737:chemistry / Q000528:radiation effects*; D066244:Proton Magnetic Resonance Spectroscopy; D012542:Scattering, Radiation; D012995:Solubility; D013050:Spectrometry, Fluorescence; D013678:Technology, Pharmaceutical / Q000379:methods; D013696:Temperature; D014466:Ultraviolet Rays
D002934:Cinnamates; D005452:Fluoresceins; D005456:Fluorescent Dyes; D008081:Liposomes; D010713:Phosphatidylcholines; D020442:Poloxamer; C007740:fluorexon
Cinnamoyl Pluronic F127; Light-responsive; Liposomes; Release; Temperature-responsive