title: Comparison of lipid sinks in sequestering common intoxicating drugs.
abstract: Intravenous lipid emulsion is a recommended treatment for local anesthetic intoxication. The lipid sink theory hypothesizes that the mechanism behind the lipid treatment is the entrapment of toxic drugs in plasma, preventing them from reaching target receptors. Lipid sink treatment has also been used as a last refuge treatment for severe tricyclic antidepressant intoxication with seemingly beneficial results. We selected three drugs, i.e. amiodarone, ketamine, and amitriptyline, that can cause severe intoxication and compared their interactions with two commercial fat emulsions (Intralipid® and ClinOleic®) and one synthetic liposome (80:20 mol% phosphatidylcholine/phosphatidylglycerol) dispersion. The interaction studies were carried out by capillary electrokinetic chromatography and the retention factors and distributions constants of the drugs were calculated. The results demonstrate that there is stronger interaction between the drugs and the synthetic liposome dispersion than with the commercial emulsions.
authors.affiliation: Laboratory of Analytical Chemistry, Department of Chemistry, University of Helsinki, Helsinki, Finland.
authors.forename: Jana
authors.initials: J
authors.lastname: Lokajová
authors.forename: Juha M
authors.initials: JM
authors.lastname: Holopainen
authors.forename: Susanne K
authors.initials: SK
authors.lastname: Wiedmer
mesh_terms: D000638:Amiodarone / Q000737:chemistry* / Q000633:toxicity; D000639:Amitriptyline / Q000737:chemistry* / Q000633:toxicity; D000928:Antidepressive Agents / Q000737:chemistry* / Q000633:toxicity; D064420:Drug-Related Side Effects and Adverse Reactions / Q000188:drug therapy*; D006801:Humans; D007700:Kinetics; D008055:Lipids / Q000737:chemistry* / Q000627:therapeutic use; D008081:Liposomes / Q000737:chemistry
chemical_list: D000928:Antidepressive Agents; D008055:Lipids; D008081:Liposomes; D000639:Amitriptyline; D000638:Amiodarone