Spectrophotometric investigation of the binding of vitamin E to water-containing reversed micelles

Leopoldo Ceraulo, Mirella Ferrugia, David Bongiorno, Giuseppe Avellone, Vincenzo Turco Liveri, Mirella Ferrugia, David Bongiorno, Leopoldo Ceraulo, Turco Liveri, Giuseppe Avellone

Risultato della ricerca: Articlepeer review

17 Citazioni (Scopus)

Abstract

The distribution constants of vitamin E partitioned between apolar organic phase and water-containing reversed micelles of sodium bis (2-ethylhexyl) sulfosuccinate (AOT), didodecyldimethylammonium bromide (DDAB), soybean phosphatidylcholine (lecithin) and tetraethylene glycol monododecyl ether (C12E4) have been evaluated by a spectrophotometric method. The results suggest that in the presence of domains from apolar organic solvent to surfactant and to water, vitamin E is partitioned between the micellar palisade layer and the organic solvent and also that its binding strength to reversed micelles depends mainly by specific interactions between the head group of vitamin E and that of the surfactant. Moreover, in addition to the advantageous interactions between vitamin E and water, the dependence of the distribution constants upon the molar ratio R (R=[water]/[surfactant]) indicates a competition between water and vitamin E for the binding sites at the water/surfactant interface. The biological implications of the preferential location and confinement of vitamin E in water-containing reversed micelles are discussed. © 2002 Elsevier Science B.V. All rights reserved.
Lingua originaleEnglish
pagine (da-a)249-255
Numero di pagine7
RivistaInternational Journal of Pharmaceutics
Volume234
Stato di pubblicazionePublished - 2002

All Science Journal Classification (ASJC) codes

  • Pharmaceutical Science

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