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Kinetically Stable Bicelles with Dilution Tolerance, Size Tunability, and Thermoresponsiveness for Drug Delivery Applications
Author(s) -
Uchida Noriyuki,
Nishizawa Horimoto Noriko,
Yamada Kuniyo,
Hikima Takaaki,
Ishida Yasuhiro
Publication year - 2018
Publication title -
chembiochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.05
H-Index - 126
eISSN - 1439-7633
pISSN - 1439-4227
DOI - 10.1002/cbic.201800304
Subject(s) - model lipid bilayer , micelle , chemistry , bilayer , phospholipid , pulmonary surfactant , drug delivery , chemical engineering , critical micelle concentration , lipid bilayer , chromatography , vesicle , membrane , analytical chemistry (journal) , organic chemistry , lipid bilayer phase behavior , aqueous solution , biochemistry , engineering
Mixtures of a phospholipid (1,2‐dipalmitoyl‐ sn ‐glycero‐3‐phosphatidylcholine, DPPC) and a sodium‐cholate‐derived surfactant (SC‐C 5 ) at room temperature formed phospholipid bilayer fragments that were edge‐stabilized by SC‐C 5 : so‐called “bicelles”. Because the bilayer melting point of DPPC (41 °C) is above room temperature and because SC‐C 5 has an exceptionally low critical micelle concentration (<0.5 m m ), the bicelles are kinetically frozen at room temperature. Consequently, they exist even when the mixture is diluted to a concentration of 0.04 wt %. In addition, the lateral size of the bicelles can be fine‐tuned by altering the molar ratio of DPPC to SC‐C 5 . On heating to ≈37 °C, the bicelles transformed into micelles composed of DPPC and SC‐C 5 . By taking advantage of the dilution tolerance, size tunability, and thermoresponsiveness, we demonstrated in vitro drug delivery based on use of the bicelles as carriers, which suggests their potential utility in transdermal drug delivery.