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Echinacea angustifolia DC. Lipophilic extract patch for skin application [Elektronski vir] : preparation In vitro and In vivo studiesHasa, Dritan ...Dodeca-2E,4E,8Z,10E/Z-tetraenoic isobutylamide (tetraene) is the main component of Echinacea angustifolia DC. lipophilic extract, the bioavailability and immunomodulatory effect after oral ... administration in soft gel capsules in healthy volunteers of which we have already demonstrated. In the present work, we assessed the transdermal administration as an alternative route of administration of such an alkamide. The first step, therefore, encompassed the preparation of a drug-in-adhesive patch with an area of 868 mm2 and containing a dose of 0.64 mg of tetraene. In vitro skin permeation studies in Franz-type diffusion chambers resulted in a tetraene flux of (103 - 10) ng +- cm-2 - h-1 with a very good linearity (r = 0.99). The relatively low lag time of just 13 min indicates low binding and the accumulation of tetraene in the skin. Finally, the patch was administered to six healthy volunteers, and the pharmacokinetic analysis was performed by nonlinear mixed effects modelling with soft gel oral capsules serving as the reference formulation. The in vivo results correlated well with the in vitro permeation and indicated an initial burst tetraene absorption from the patch that was in parallel with the zero-order kinetics of absorption. The rate of the latter process was in good agreement with the one estimated in vitro. The tetraene absorption rate was therefore slow and prolonged with time, resulting in a bioavailability of 39% relative to the soft gel capsules and a very flat plasma concentration profile.Source: Pharmaceutics [Elektronski vir]. - ISSN 1999-4923 (Vol. 12, iss. 11, 2020, str. 1-11)Type of material - e-articlePublish date - 2020Language - englishCOBISS.SI-ID - 37568515
Author
Hasa, Dritan |
Žakelj, Simon |
Grabnar, Iztok |
Cilurzo, Francesco |
Dall'Acqua, Stefano |
Riva, Antonella |
Perissutti, Beatrice |
Voinovich, Dario
Topics
Farmakokinetika |
Echinacea angustifolia lipophilic extract |
tetraene |
drug-in-adhesive patch |
in vitro skin permeation |
pharmacokinetic |
lipofilni ekstrakt Echinacea angustifolia |
tetraen |
zdravilna učinkovina v adhezivnem obližu |
prehod skozi kožo in vitro
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Hasa, Dritan | |
Žakelj, Simon | 22659 |
Grabnar, Iztok | 16107 |
Cilurzo, Francesco | |
Dall'Acqua, Stefano | |
Riva, Antonella | |
Perissutti, Beatrice | |
Voinovich, Dario |
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