| Titre : |
Acetyl zingerone : An efficacious multifunctional ingredient for continued protection against ongoing DNA damage in melanocytes after sun exposure ends |
| Type de document : |
texte imprimé |
| Auteurs : |
Ratan K. Chaudhuri, Auteur ; T. Meyer, Auteur ; S. Premi, Auteur ; D. Brash, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 36-45 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Acétyl zingerone
Antioxydants
Dermo-cosmétologie
Dimères cyclobutyliques de pyrimidine
Mélanocytes
Peau -- Soins et hygiène
Photoprotection
Produits antisolaires
Rayonnement ultraviolet
|
| Index. décimale : |
668.5 Parfums et cosmétiques |
| Résumé : |
- Objective : Recent research has shown that significant levels of cyclobutane pyrimidine dimers (CPDs) in DNA continue to form in melanocytes for several hours in the dark after exposure to ultraviolet radiation (UVR) ends. We document the utility of a new multifunctional ingredient, 3-(4-hydroxy, 3-methoxybenzyl)-pentane-2,4-dione (INCI acetyl zingerone (AZ)), to protect melanocytes against CPD formation after UVR exposure ends.
- Methods : The use of AZ as an intervention to reduce CPD formation after irradiation was assessed in vitro by comparing kinetic profiles of CPD formation for several hours after irradiation in cells that were untreated or treated with AZ immediately after irradiation. Multifunctional performance of AZ as an antioxidant, quencher and scavenger was established using industry-standard in vitro chemical assays, and then, its efficacy in a more biological assay was confirmed by its in vitro ability to reduce intracellular levels of reactive oxygen species (ROS) in keratinocytes exposed to UVA radiation. Molecular photostability was assessed in solution during exposure to solar-simulated UVR and compared with the conventional antioxidant a-tocopherol.
- Results : Even when added immediately after irradiation, AZ significantly inhibited ongoing formation of CPDs in melanocytes after exposure to UVA. Incubation with AZ before irradiation decreased intracellular levels of UVA-induced ROS formation in keratinocytes. Compared with a-tocopherol, the molecular structure of AZ endows it with significantly better photostability and efficacy to neutralize free radicals (.OH, .OOH), physically quench singlet oxygen (1O2) and scavenge peroxynitrite (ONOO-).
- Conclusion : These results designate AZ as a new type of multifunctional ingredient with strong potential to extend photoprotection of traditional sunscreens and daily skincare products over the first few hours after sun exposure ends. |
| Note de contenu : |
- MATERIALS AND METHODS : Acetyl zingerone - Method of analysis by HPLC - Measurement of dark-CPD formation in melanocytes - Measurement of absorbance spectrum - Measurement of intracellular ROS in keratinocytes - In vitro determination of efficiencies to neutralize key ROS - Physical quenching of singlet oxygen (1O2) - Photochemical stability
- RESULTS : Acetyl zingerone (AZ) significantly reduces dark-CPD formation within 1h after UVA exposure in melanocytes - Acetyl zingerone (AZ) significantly reduces intracellular ROS formation in keratinocytes after UVA exposure - Acetyl zingerone (AZ) possesses negligible absorbance in the UV spectral region - Acetyl zingerone (AZ) is an effective antioxidant, scavenger of peroxynitrite and physical quencher of 1O2 - Acetyl zingerone (AZ) is more photochemically stable than a-tocopherol |
| DOI : |
10.1111/ics.12582 |
| En ligne : |
https://drive.google.com/file/d/1lUafPqltgREXBxkkduHLJ-_d2UjqSQQM/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33677 |
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 42, N° 1 (02/2020) . - p. 36-45
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