Vitamin E Prevention of Visible Light Pigmentation

Summary

The main objective of the study is to assess the efficacy of an antioxidant in preventing pigmentation induced by visible light in subjects with a phototype IV or V. Patients will be exposed to a range of visible light to areas on the back to confirm study eligibility. Patients showing pigmentation after 7 days on the exposed areas will be eligible to continue. Eligible patients will have study product applied to part of the back and placebo on another part of the back. The placebo area will be exposed to the same range of light based as at Day -7. The area where the antioxidant is applied will have a higher range of light exposure than the area without the study product. Seven days later, the areas will be examined to determine the lowest exposure inducing pigmentation on the sides with placebo and with antioxidant. The color will also be measured between two identical exposures with placebo and with antioxidant.

Timeline

Start

2013-08

Primary completion

2013-11

Completion

2013-11

Publications

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• Background Liebel F, Kaur S, Ruvolo E, Kollias N, Southall MD. Irradiation of skin with visible light induces reactive oxygen species and matrix-degrading enzymes. J Invest Dermatol. 2012 Jul;132(7):1901-7. doi: 10.1038/jid.2011.476. Epub 2012 Feb 9.
• Background Ball Arefiev KL, Hantash BM. Advances in the treatment of melasma: a review of the recent literature. Dermatol Surg. 2012 Jul;38(7 Pt 1):971-84. doi: 10.1111/j.1524-4725.2012.02435.x. Epub 2012 May 14.
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• Background Kameyama K, Sakai C, Kondoh S, Yonemoto K, Nishiyama S, Tagawa M, Murata T, Ohnuma T, Quigley J, Dorsky A, Bucks D, Blanock K. Inhibitory effect of magnesium L-ascorbyl-2-phosphate (VC-PMG) on melanogenesis in vitro and in vivo. J Am Acad Dermatol. 1996 Jan;34(1):29-33. doi: 10.1016/s0190-9622(96)90830-0.
• Background Ertam I, Mutlu B, Unal I, Alper S, Kivcak B, Ozer O. Efficiency of ellagic acid and arbutin in melasma: a randomized, prospective, open-label study. J Dermatol. 2008 Sep;35(9):570-4. doi: 10.1111/j.1346-8138.2008.00522.x.
• Background Hwang SW, Oh DJ, Lee D, Kim JW, Park SW. Clinical efficacy of 25% L-ascorbic acid (C'ensil) in the treatment of melasma. J Cutan Med Surg. 2009 Mar-Apr;13(2):74-81. doi: 10.2310/7750.2008.07092.
• Background Stella A, Golin R, Zanchetti A. Effects of reversible renal denervation on haemodynamic and excretory functions of the ipsilateral and contralateral kidney in the cat. J Hypertens. 1986 Apr;4(2):181-8. doi: 10.1097/00004872-198604000-00007.
• Background Wu Y, Matsui MS, Chen JZ, Jin X, Shu CM, Jin GY, Dong GH, Wang YK, Gao XH, Chen HD, Li YH. Antioxidants add protection to a broad-spectrum sunscreen. Clin Exp Dermatol. 2011 Mar;36(2):178-87. doi: 10.1111/j.1365-2230.2010.03916.x. Epub 2010 Aug 27.

Drugs

Indications