| Are there mechanistic differences between ultraviolet and visible radiation induced skin pigmentation? | |
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MedLine Citation:
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PMID: 21993454 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Most of the studies on sunlight-induced pigmentation of skin are mainly focused on ultraviolet (UV) radiation-induced pigmentation and ways to prevent it. Recent studies have shown that the visible component of sunlight can also cause significant skin pigmentation. In the current study, the extent of pigmentation induced by UV and visible regions of sunlight in subjects with Fitzpatrick skin type IV-V was measured and compared with pigmentation induced by total sunlight. The immediate pigment darkening (IPD) induced by the visible fraction of sunlight is not significantly different from that induced by the UV fraction. However, the persistent pigment darkening (PPD) induced by visible fraction of sunlight in significantly lower than that induced by the UV fraction. The dose responses of IPD induced by UV, visible light and total sunlight suggest that both UV and visible light interact with the same precursor although UV is 25 times more efficient in inducing pigmentation per J cm(-2) of irradiation compared to visible radiation. The measured diffused reflection spectra and decay kinetics of UV and visible radiation-induced pigmentation are very similar, indicating that the nature of the transient and persistent species involved in both the processes are also likely to be same. |
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Authors:
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Rajagopal Ramasubramaniam; Arindam Roy; Bharati Sharma; Surendra Nagalakshmi |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-10-13 |
Journal Detail:
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Title: Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology Volume: - ISSN: 1474-9092 ISO Abbreviation: - Publication Date: 2011 Oct |
Date Detail:
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Created Date: 2011-10-13 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101124451 Medline TA: Photochem Photobiol Sci Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Unilever R&D Bangalore, 64 Main Road, Whitefield, Bangalore, 560066, India. ram.rajagopal@unilever.com. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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