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Molecules 2016, 21(10), 1269; doi:10.3390/molecules21101269

Efficacy of Pre- and Post-Treatment by Topical Formulations Containing Dissolved and Suspended Silybum marianum against UVB-Induced Oxidative Stress in Guinea Pig and on HaCaT Keratinocytes

1
Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Debrecen, Nagyerdei körút 98, 4032 Debrecen, Hungary
2
Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Debrecen, Nagyerdei körút 98, 4032 Debrecen, Hungary
*
Author to whom correspondence should be addressed.
Academic Editor: Tung-Hu Tsai
Received: 18 May 2016 / Revised: 14 September 2016 / Accepted: 17 September 2016 / Published: 22 September 2016
(This article belongs to the Special Issue Silymarin)
View Full-Text   |   Download PDF [2790 KB, uploaded 22 September 2016]   |  

Abstract

Plants with high amounts of antioxidants may be a promising therapy for preventing and curing UV-induced oxidative skin damage. The objective of this study was to verify the efficacy of topical formulations containing dissolved and suspended Silybum marianum extract against UVB-induced oxidative stress in guinea pig and HaCaT keratinocytes. Herbal extract was dissolved in Transcutol HP (TC) and sucrose-esters were incorporated as penetration enhancers in creams. Biocompatibility of compositions was tested on HeLa cells and HaCaT keratinocytes as in vitro models. Transepidermal water loss (TEWL) tests were performed to prove the safety of formulations in vivo. Drug release of different compositions was assessed by Franz diffusion methods. Superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and lipid peroxidation (MDA) activities were evaluated before and after UVB irradiation in a guinea pig model and HaCaT cells. Heme oxygenase-1 (HO-1) enzyme activity was measured in the epidermis of guinea pigs treated by different creams before and after UVB irradiation. Treatment with compositions containing silymarin powder (SM) dissolved in TC and sucrose stearate SP 50 or SP 70 resulted in increased activities of all reactive oxygen species (ROS) eliminating enzymes in the case of pre- and post-treatment as well. Reduction in the levels of lipid peroxidation end products was also detected after treatment with these two compositions. Post-treatment was more effective as the increase of the activity of antioxidants was higher. Lower HO-1 enzyme levels were measured in the case of pre- and post-treatment groups compared to control groups. Therefore, this study demonstrates the effectiveness of topical formulations containing silymarin in inhibiting UVB irradiation induced oxidative stress of the skin. View Full-Text
Keywords: silymarin; antioxidants; transcutol; sucrose esters; topical formulations; UVB-induced oxidative stress; HO-1 enzyme silymarin; antioxidants; transcutol; sucrose esters; topical formulations; UVB-induced oxidative stress; HO-1 enzyme
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Fehér, P.; Ujhelyi, Z.; Váradi, J.; Fenyvesi, F.; Róka, E.; Juhász, B.; Varga, B.; Bombicz, M.; Priksz, D.; Bácskay, I.; Vecsernyés, M. Efficacy of Pre- and Post-Treatment by Topical Formulations Containing Dissolved and Suspended Silybum marianum against UVB-Induced Oxidative Stress in Guinea Pig and on HaCaT Keratinocytes. Molecules 2016, 21, 1269.

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