title: Glycosylated liposomes against Helicobacter pylori: behavior in acidic conditions.
abstract: Helicobacter pylori was isolated in 1982 and confirmed as a gastric pathogenic agent at the end of the 1980s. The present work deals with liposomes formulations in which are incorporated cholesteryl tetraethylene glycol oside as model ligands for H. pylori adhesins. This study is devoted to the behavior of liposomes in gastric conditions. The glycosylated vesicles are stable and the pH of the internal aqueous compartment remains close to 4 even through more acidic conditions are imposed to the external phase (pH 1.2-2). Such a pH gradient depends essentially on the nature of phospholipids used and is not extensively affected by the incorporation of the targeting agent. These aspects are particularly important to the development of liposome formulations against H. pylori, bacteria sensitive to antibiotics which are unstable in very acidic conditions.
authors.affiliation: ISPB - Université Lyon I, France.
authors.forename: Pierre-Louis
authors.initials: PL
authors.lastname: Bardonnet
authors.forename: Vincent
authors.initials: V
authors.lastname: Faivre
authors.forename: Paul
authors.initials: P
authors.lastname: Boullanger
authors.forename: Michel
authors.initials: M
authors.lastname: Ollivon
authors.forename: Françoise
authors.initials: F
authors.lastname: Falson