Preparation, characterization and uptake by primary cultured rat hepatocytes of liposomes surface-modified with glycyrrhetinic acid

Pharmazie. 2007 Aug;62(8):614-9.

Abstract

3-succinyl-30-stearyl glycyrrhetinic acid (Suc-GLAOSt) was synthesized as a targeting molecule, and incorporated in ordinary to liposomes (LP) to prepare a liposome surface-modified with glycyrrhetinic acid (LP-GLA), which could bind to the hepatocyte through the specific binding site of glycyrrhetinic acid (GLA) on the surface of rat cellular membrane. The maximal molar ratio of Suc-GLAOSt to total lipids in LP-GLA was 1:10. Calcein loaded liposome (Cal-LP) and calcein loaded LP-GLA (Cal-LP-GLA) were prepared by an ethanol injection method. The average diameter of Cal-LP and Cal-LP-GLA was 65 nm +/- 16 nm and 68 nm +/- 21 nm, respectively. The characteristics of cellular uptake of the two types of liposome were investigated through cellular uptake and competitive inhibition experiments. The uptake of Cal-LP-GLA by rat hepatocytes was markedly higher (3.3-fold) than that of Cal-LP (P < 0.01). The uptake of Cal-LP-GLA was inhibited, but the uptake of Cal-LP was not influenced by adding extraneous GLA. LP-GLA may be internalized by hepatocytes via the specific binding site, and can be used as a novel and promising carrier for targeting drug delivery to hepatocytes.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cells, Cultured
  • Dose-Response Relationship, Drug
  • Drug Carriers
  • Fluoresceins / chemistry
  • Glycyrrhetinic Acid / administration & dosage
  • Glycyrrhetinic Acid / pharmacokinetics*
  • Hepatocytes / metabolism*
  • Indicators and Reagents
  • Kinetics
  • Liposomes
  • Magnetic Resonance Spectroscopy
  • Male
  • Microscopy, Electron, Transmission
  • Particle Size
  • Rats
  • Rats, Wistar
  • Surface Properties

Substances

  • Drug Carriers
  • Fluoresceins
  • Indicators and Reagents
  • Liposomes
  • Glycyrrhetinic Acid
  • fluorexon