Abstract:
BACKGROUND:High doses of sun-emitted UV-radiation induce reactive oxygen species (ROS) as major pro-oxidants thus inducing premature skin aging. The best prevention of the destructive action of free radicals in human skin is textile coverings, topical sunscreens and the development of a high antioxidative protective network. OBJECTIVE:The effects of topical, systemic and combined application of antioxidants (AO) were investigated on human skin in vivo. METHODS:Topical application of creams and systemic incorporation of tablets both containing AO was investigated in vivo by resonance Raman spectroscopy. RESULTS:Topical, systemic and combined AO-treatments induced a statistically significant increase of AO levels in human skin while placebo did not show any changes. The highest accumulation was induced by the combination of topical and systemic AO. Carotenoid-tablets combined with placebo-cream induced less carotenoid accumulation than carotenoid-tablets alone. Carotenoid levelling after the end of treatment lasted for around 2 weeks following the topical application of AOs, and up to 5 weeks after systemic administration, depending on the BMI of volunteers. CONCLUSION:Topically applied AO are stored in the SC for a short time only due to the rapid AO-depletion by desquamation, textile contact, washing and environmental stress. In contrast to topical application, the systemically applied carotenoids are stored in the body fat tissue and slowly released onto the skin surface with sweat and sebum. The combined topical and systemic application of AO represents an optimal form of protection of the AO-network.
journal_name
J Dermatol Scijournal_title
Journal of dermatological scienceauthors
Darvin ME,Fluhr JW,Schanzer S,Richter H,Patzelt A,Meinke MC,Zastrow L,Golz K,Doucet O,Sterry W,Lademann Jdoi
10.1016/j.jdermsci.2011.06.009subject
Has Abstractpub_date
2011-10-01 00:00:00pages
53-8issue
1eissn
0923-1811issn
1873-569Xpii
S0923-1811(11)00200-3journal_volume
64pub_type
杂志文章abstract::Flank organs of male Golden Syrian hamsters contain sebaceous glands and hair follicles whose morphology and function are highly dependent on androgen, which makes these organs a useful model to study androgen action. In order to investigate molecular mechanisms of androgen action, we cloned a cDNA encoding the hamste...
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