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Sulforaphane [in broccoli] mobilizes cellular defenses that protect skin against damage by UV radiation - Source: Proceedings of the National Academy of Sciences, USA, Oct 30, 2007

  [ 5 votes ]   [ 1 Comment ]
By Paul Talalay, et al. • • November 23, 2008

[Note: the full text of this article is available free in PubMed Central. To quote: “The advantage of using sulforaphane as an inducer is that it is a dietary component. Because it exerts most of its effects by the transcriptional enhancement of the synthesis of proteins, most of which are enzymes, its effects are long lasting, catalytic, and unlikely to interfere with vitamin D biosynthesis.”]

UV radiation (UVR) is a complete carcinogen that elicits a constellation of pathological events, including direct DNA damage, generation of reactive oxidants that peroxidize lipids and damage other cellular components, initiation of inflammation, and suppression of the immune response. Recent dramatic increases in the incidence of nonmelanoma skin cancers are largely attributable to higher exposure of an aging population to UVR. Therefore, the development of cellular strategies for intrinsic protection of the skin against the deleterious effects of UVR is imperative.

Here we show that erythema resulting from UVR is a comprehensive and noninvasive biomarker for assessing UVR damage and can be precisely and easily quantified in human skin. Topical application of sulforaphane-rich extracts of 3-day-old broccoli sprouts up-regulated phase 2 enzymes in the mouse and human skin, protected against UVR-induced inflammation and edema in mice, and reduced susceptibility to erythema arising from narrow-band 311-nm UVR in humans.

In six human subjects (three males and three females, 28-53 years of age), the mean reduction in erythema across six doses of UVR (300-800 mJ/cm(2) in 100 mJ/cm(2) increments) was 37.7% (range 8.37-78.1%; P = 0.025). This protection against a carcinogen in humans is catalytic and long lasting.

Source: Proceedings of the National Academy of Sciences, USA, Oct 30, 2007. PMID: 17956979 , Talalay P, Fahey JW, Healy ZR, Wehage SL, Benedict AL, Min C, Dinkova-Kostova AT. Department of Pharmacology and Molecular Sciences, Bloomberg School of Public Health, The Johns Hopkins University, Baltimore, MD 21205, USA. [E-mail:]

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Article Comments Post a Comment

Sulforaphane from Broccoli
Posted by: lisafelipa
Nov 27, 2008
How does one obtain this substance in liquid form that could be applied to the face? So far I can only find it in powder in capsules. Thank you! Lisafelipa
Reply Reply
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