title: PAMAM dendrimers as solubilizers and hosts for 8-methoxypsoralene enabling transdermal diffusion of the guest.
abstract: PAMAM dendrimers form host-guest complexes with 8-methoxypsoralene (8-MOP) - the photosensitizer for PUVA therapy. The stoichiometry of complexes was studied by (1)H NMR spectroscopy in solution and by differential scanning calorimetry in neat mixtures containing 8-MOP and dendrimers of generations G2.5, G3, G3.5, and G4. The dendrimers showed solubilization effect for 8-MOP resulting in increase of 8-MOP concentration in methanol up to 15 molecules of 8-MOP per G2.5 and G3 and 30 molecules of 8-MOP per G3.5, and G4. Isolation of oily host-guest complexes containing 3 or 7 molecules of 8-MOP per G3 and G4, respectively corroborate well with DSC results; glass transition temperature of neat host-guest complexes increases with number of host molecules in comparison with G3 or G4, until the capacity of host is exceeded. The oily host-guest complexes of stoichiometry 3:1 and 7:1 of 8-MOP to G3 and G4, respectively are well soluble in water. The 3:1 host-guest complexes diffused slowly through polyvinyldifluoride and pig ear skin membranes, when released from o/w emulsion. The host-guest complex 8-MOP-G3 was proposed as convenient formulation for psoralene skin administration in PUVA therapy.
authors.affiliation: Department of Cosmetology, University of Information Technology and Management in Rzeszów, 35-225 Rzeszów, Poland.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Borowska
authors.forename: Barbara
authors.initials: B
authors.lastname: Laskowska
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Magoń
authors.forename: Bogdan
authors.initials: B
authors.lastname: Mysliwiec
authors.forename: Marek
authors.initials: M
authors.lastname: Pyda
authors.forename: Stanisław
authors.initials: S
authors.lastname: Wołowiec
mesh_terms: D000279:Administration, Cutaneous; D000818:Animals; D050091:Dendrimers / Q000008:administration & dosage / Q000737:chemistry / Q000493:pharmacokinetics*; D004058:Diffusion / Q000187:drug effects; D004337:Drug Carriers / Q000008:administration & dosage / Q000737:chemistry / Q000493:pharmacokinetics*; D008730:Methoxsalen / Q000008:administration & dosage / Q000737:chemistry / Q000493:pharmacokinetics*; D010539:Permeability; D012869:Skin Absorption / Q000502:physiology*; D012995:Solubility; D013552:Swine
chemical_list: D050091:Dendrimers; D004337:Drug Carriers; C104700:PAMAM Starburst; D008730:Methoxsalen