title: Evaluation of the interaction of coumarins with biomembrane models studied by differential scanning calorimetry and Langmuir-Blodgett techniques.
abstract: Three coumarins, scopoletin (1), esculetin (2), and esculin (3), were investigated by differential scanning calorimetry and Langmuir-Blodgett techniques to gain information about the interaction of these compounds with cellular membranes. Phospholipids assembled as multilamellar vesicles or monolayers (at the air-water interface) were used as biomembrane models. Differential scanning calorimetry was employed to study the interaction of these coumarins with multilamellar vesicles and to evaluate their absorption by multilamellar vesicles. These experiments indicated that 1-3 interact in this manner to different extents. The Langmuir-Blodgett technique was used to study the effect of these coumarins on the organization of phospholipids assembled as a monolayer. The data obtained were in agreement with those obtained in the calorimetric experiments.
authors.affiliation: Dipartimento di Scienze del Farmaco, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy.
authors.forename: Maria Grazia
authors.initials: MG
authors.lastname: Sarpietro
authors.forename: Maria Chiara
authors.initials: MC
authors.lastname: Giuffrida
authors.forename: Sara
authors.initials: S
authors.lastname: Ottimo
authors.forename: Dorotea
authors.initials: D
authors.lastname: Micieli
authors.forename: Francesco
authors.initials: F
authors.lastname: Castelli
mesh_terms: D002152:Calorimetry, Differential Scanning; D003374:Coumarins / Q000737:chemistry* / Q000378:metabolism; D004929:Esculin / Q000737:chemistry / Q000378:metabolism; D006027:Glycosides / Q000737:chemistry / Q000378:metabolism; D008954:Models, Biological; D015394:Molecular Structure; D010743:Phospholipids / Q000737:chemistry*; D011284:Pregnenolone / Q000031:analogs & derivatives / Q000737:chemistry / Q000378:metabolism; D012603:Scopoletin / Q000737:chemistry / Q000378:metabolism
chemical_list: D003374:Coumarins; D006027:Glycosides; D010743:Phospholipids; C081583:esculentin steroid; D004929:Esculin; D011284:Pregnenolone; D012603:Scopoletin