title: In vitro and in vivo studies of galactose-modified liver-targeting liposomes.
abstract: Oridonin (ORI) is a bioactive diterpenoid compound extracted from the well known Chinese traditional medicine Rabdosia rubescens. The aim of this study was to prepare ORI loaded liposomes surface-modified with galactose (NOH-ORI-LP) and evaluate their characteristics compared with ORI loaded liposomes (ORI-LP) and ORI solution in vitro and in vivo. The NOH-ORI-LP was prepared by ethanol injection method. The NOH-ORI-LP was characterized by their morphology, particle size, zeta potential and encapsulation efficiency. The concentration of ORI in plasma and tissues at different sampling time points were determined. The liver concentration-time curves of NOH-ORI-LP in mice were determined, and the pharmacokinetic parameters were calculated and compared by statistical analysis. Our data revealed that NOH-ORI-LP has a particle size of about (173 ± 12) nm. The particles exhibit a negative electrical charge (-31.5 ± 1.6 mV), and possess high encapsulation efficiency (94.1 ± 1.2%). There were significantly different parameters of k10and area under the plasma concentration-time curve (AUC0-t) between liposomes and solution. The mean residence time (MRT0-t) in plasma of NOH-ORI-LP was 5.56 times longer than that of solution. Compared with solution, NOH-ORI-LP delivered about 4.28 times higher ORI into liver. Thus, an optimum intravenous galactose-modified liposome formulation for ORI could be developed as an alternative to the commercial ORI preparations.
authors.affiliation: a Department of pharmacy, Guangdong Pharmaceutical University , Guangdong, Guangzhou, PR China.
authors.forename: Bohong
authors.initials: B
authors.lastname: Guo
authors.affiliation: b School of Chinese Materia Medica, Guangzhou University of Chinese Medicine , Guangdong, Guangzhou, PR China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Cheng
authors.affiliation: a Department of pharmacy, Guangdong Pharmaceutical University , Guangdong, Guangzhou, PR China.
authors.forename: Niying
authors.initials: N
authors.lastname: Li
authors.affiliation: a Department of pharmacy, Guangdong Pharmaceutical University , Guangdong, Guangzhou, PR China.
authors.forename: Xiaofang
authors.initials: X
authors.lastname: Li
authors.affiliation: a Department of pharmacy, Guangdong Pharmaceutical University , Guangdong, Guangzhou, PR China.
authors.forename: Miaozhen
authors.initials: M
authors.lastname: Jin
authors.affiliation: a Department of pharmacy, Guangdong Pharmaceutical University , Guangdong, Guangzhou, PR China.
authors.forename: Ting
authors.initials: T
authors.lastname: Li
authors.affiliation: a Department of pharmacy, Guangdong Pharmaceutical University , Guangdong, Guangzhou, PR China.
authors.forename: Jin
authors.initials: J
authors.lastname: Li