title: Positively Charged Nanostructured Lipid Carriers and Their Effect on the Dissolution of Poorly Soluble Drugs.
abstract: The objective of this study is to develop suitable formulations to improve the dissolution rate of poorly water soluble drugs. We selected lipid-based formulation as a drug carrier and modified the surface using positively charged chitosan derivative (HTCC) to increase its water solubility and bioavailability. Chitosan and HTCC-coated lipid particles had higher zeta-potential values than uncoated one over the whole pH ranges and improved encapsulation efficiency. In vitro drug release showed that all NLC formulations showed higher in vitro release efficiency than drug particle at pH 7.4. Furthermore, NLC formulation prepared with chitosan or HTCC represented good sustained release property. The results indicate that chitosan and HTCC can be excellent formulating excipients of lipid-based delivery carrier for improving poorly water soluble drug delivery.
authors.affiliation: Department of Food Science and Technology, Sejong University, 261 Neungdong-ro, Gwangjin-gu, Seoul 143-747, Korea. ko1786@naver.com.
authors.forename: Kyeong-Ok
authors.initials: KO
authors.lastname: Choi
authors.affiliation: Department of Food Science and Technology, Sejong University, 261 Neungdong-ro, Gwangjin-gu, Seoul 143-747, Korea. choohc2002@naver.com.
authors.forename: Jaehyeog
authors.initials: J
authors.lastname: Choe
authors.affiliation: Department of Food Science and Technology, Sejong University, 261 Neungdong-ro, Gwangjin-gu, Seoul 143-747, Korea. sjs007kr@hanmail.net.
authors.forename: Seokjin
authors.initials: S
authors.lastname: Suh
authors.affiliation: Department of Food Science and Technology, Sejong University, 261 Neungdong-ro, Gwangjin-gu, Seoul 143-747, Korea. sanghoonko@sejong.ac.kr.
authors.forename: Sanghoon
authors.initials: S
authors.lastname: Ko
mesh_terms: D001682:Biological Availability; D002626:Chemistry, Pharmaceutical; D048271:Chitosan / Q000737:chemistry* / Q000627:therapeutic use; D004337:Drug Carriers / Q000737:chemistry* / Q000627:therapeutic use; D016503:Drug Delivery Systems; D065546:Drug Liberation; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008055:Lipids / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry / Q000627:therapeutic use; D012995:Solubility; D014867:Water / Q000737:chemistry
chemical_list: D004337:Drug Carriers; D008055:Lipids; D014867:Water; D048271:Chitosan
keywords: N-(2-hydroxy)propyl-3-trimethyl ammonium chitosan chloride; in vitro release; indomethacin; nanostructured lipid nanocarrier; poorly water soluble drug