Photodamage determination of human hair

► We optimise four methodologies to study integrity of human hair. ► We determine changes of irradiated hair and these procedures are also performing with non-irradiated hair as a control. ► UV radiation shows an increase protein degradation, lipidic peroxidation, tryptophan degradation and free rad...

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Bibliographic Details
Published in:Journal of photochemistry and photobiology. B, Biology Biology, 2012-01, Vol.106 (5), p.101-106
Main Authors: Fernández, Estibalitz, Barba, Clara, Alonso, Cristina, Martí, Meritxell, Parra, José Luis, Coderch, Luisa
Format: Article
Language:English
Subjects:
antioxidant activity
bleaching
electron paramagnetic resonance spectroscopy
Electron Spin Resonance Spectroscopy
ESR
Free radicals
Free Radicals - chemistry
Hair
Hair - radiation effects
Humans
keratin
Lipid Peroxidation
Lipid peroxides
melanin
melanins
Melanins - chemistry
Melanins - metabolism
oxidation
Oxidation-Reduction
peroxidation
Photo-degradation
photobiology
Photolysis
protein degradation
Proteins - chemistry
Proteins - metabolism
solar radiation
Tryptophan
Tryptophan - chemistry
Tryptophan - metabolism
Ultraviolet Rays
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Summary:► We optimise four methodologies to study integrity of human hair. ► We determine changes of irradiated hair and these procedures are also performing with non-irradiated hair as a control. ► UV radiation shows an increase protein degradation, lipidic peroxidation, tryptophan degradation and free radicals formation. ► The efficacy of formulations with antioxidant active agents could be evaluated following these optimised methodologies. Sunlight on human hair causes photo-degradation. This results in bleaching due to melanin oxidation through free radicals, and induces keratin impairment. Protein degradation, tryptophan degradation, lipidic peroxidation and electron paramagnetic resonance can be used to evaluate proteic and lipidic photodecomposition and free radical formation in hair fibres subjected to antioxidant action and different UV intensities. All these methodologies have been optimised to determine protein, lipid and melanin degradation in hair subjected to different UV intensities.
ISSN:1011-1344
1873-2682
DOI:10.1016/j.jphotobiol.2011.10.011