Formulation and evaluation of ATP-containing liposomes including lactosylated ASGPr ligand.
An original ligand (Lac-10-Chol) designed to interact with asialoglycoprotein receptors to potentially target hepatocyte was synthesised by grafting a lactose head to a cholesteryl structure, which was then included in liposomes. Preliminary formulation tests led to the selection of conventional formulations based on soybean phosphatidylcholine/cholesterol/DOTAP (+/- DOPE) (+/- Lac-10-Chol) that present reproducible absolute entrapment value (1.45 +/- 0.10%), with a size of 109 +/- 7 nm and a slight positive charge (3.77 +/- 1.59 mV). Cell viability (via the MTT test), expressed as the percentage of nontreated cells in HepG2 cells, was very close to the control. Internalization tests evidenced an intracellular penetration of fluorescent liposomes, but no specific ligand effect was demonstrated (P > 0.05). Nevertheless, regarding the adenosine triphosphate (ATP) assay, a slight increase was obtained with liposome loaded with ATP incorporating Lac-10-chol after 24 hours (P < 0.05).
Tep
Karona
K
Laboratoire de Pharmacie Galénique, Université Paris Descartes, Faculté des Sciences Pharmaceutiques et Biologiques, Paris Cedex, France.
Korb
Virginie
V
Richard
Cyrille
C
Escriou
Virginie
V
Largeau
Céline
C
Vincourt
Véronique
V
Bessodes
Michel
M
Guellier
Adeline
A
Scherman
Daniel
D
Cynober
Luc
L
Chaumeil
Jean-Claude
JC
Dumortier
Gilles
G
D000255:Adenosine Triphosphate / Q000737:chemistry*; D002460:Cell Line; D002626:Chemistry, Pharmaceutical; D002784:Cholesterol / Q000031:analogs & derivatives / Q000737:chemistry*; D005453:Fluorescence; D006801:Humans; D007785:Lactose / Q000737:chemistry*; D008024:Ligands; D008081:Liposomes
D008024:Ligands; D008081:Liposomes; D000255:Adenosine Triphosphate; D002784:Cholesterol; D007785:Lactose