Abstract
The artemisinin derivative artemisone has antitumor activity. In particular when encapsulated in solid lipid nanoparticles (SLNs) and niosomes, it is active against human melanoma A-375 cells, although such formulations have a negligible effect on human keratinocyte cells. The aim here was to determine whether these formulations could enhance the topical delivery and skin permeation of artemisone as a prelude to evaluating use of artemisone and related compounds for melanoma treatment. In vitro skin permeation studies were conducted to determine the concentration of artemisone delivered into the stratum corneum-epidermis and epidermis-dermis. Artemisone-SLNs delivered artemisone into the stratum corneum-epidermis at significantly higher concentration (62.632μg/mL) than the artemisone-niosomes (12.792μg/mL). Neither of the controls delivered artemisone into the stratum corneum-epidermis. In the epidermis-dermis, artemisone (13.404μg/mL) was only detected after application of the SLN formulation. Overall, the excellent topical delivery of artemisone with the SLN formulation coupled with the intrinsic activity of formulated artemisone confirms potential for use in treatment of melanoma.
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