Decylglucoside-based microemulsions for cutaneous localization of lycopene and ascorbic acid.

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Issue Date
9/15/2012
Authors
Pepe, Dominique
Phelps, Jessica
Lewis, Kevin
Dujack, Jared
Scarlett, Katrina
Jahan, Sumaya
Bonnier, Emilee
Milic-Pasetto, Tatjana
Hass, Martha A
Lopes, Luciana B
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Abstract
Cutaneous delivery of combinations of antioxidants offers the possibility of enhanced protection against UV-radiation. In this study, we investigated the potential of sugar-based microemulsions containing monoglycerides to promote simultaneous cutaneous delivery of lycopene and ascorbic acid, and increase tissue antioxidant activity. Lycopene and ascorbic acid were incorporated (0.04% and 0.2% (w/w), respectively) in decylglucoside-based microemulsions containing isopropyl myristate mixed with monocaprylin (ME-MC), monolaurin (ME-ML) or monoolein (ME-MO) as oil phase. The microemulsions increased lycopene delivery into porcine ear skin by 3.3- to 8-fold compared to a drug solution. The effect of microemulsions on ascorbic acid cutaneous delivery was more modest (1.5-3-fold), and associated with an approximately 2-fold increase in transdermal delivery. According to their penetration-enhancing ability, the microemulsions were ranked ME-MC>ME-MO>ME-ML. This superiority of ME-MC coincided with a stronger effect in decreasing skin electrical resistance. After 18 h of treatment, the viability of bioengineered skin treated with ME-MC was 2.2-times higher compared to Triton-X100 (moderate irritant), demonstrating that ME-MC is less cytotoxic. Skin treatment with ME-MC containing both antioxidants increased the tissue antioxidant activity by 10.2-fold, but no synergism between the antioxidants was observed.
Citation
Pepe D, Phelps J, Lewis K, Dujack J, Scarlett K, Jahan S, Bonnier E, Milic-Pasetto T, Hass MA, Lopes LB. Decylglucoside-based microemulsions for cutaneous localization of lycopene and ascorbic acid. Int J Pharm. 2012 Sep 15;434(1-2):420-8. doi: 10.1016/j.ijpharm.2012.06.016. Epub 2012 Jun 9. PMID: 22692080.
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