| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 30624 | Journal of Photochemistry and Photobiology B: Biology | 2013 | 12 Pages |
Three lichen extracts and ten lichenic compounds have been screened for their photoprotective activities. The determination of their Sun Protection Factor (SPF) and Protection Factor-UVA (PF-UVA) values was done in vitro. Among them, a Lasallia pustulata extract and gyrophoric acid exhibited SPF values over 5, which is better than Homosalate (SPF ≈ 4). Their photoprotective properties are only slightly modified after a 2-hours period of irradiation. Salazinic acid and L. pustulata presented characteristics of a UVA booster like the butyl-methoxydibenzoylmethane (Avobenzone) (PF-UVA ≈ 2 vs. 2.8 for Avobenzone). Salazinic acid was a better anion superoxide scavenger than ascorbic acid and none of them exhibited a photosensitizing cytotoxicity by exposing them on HaCaT cells to UVA radiations (photo-irritancy factor PIF < 5).
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Lichen extracts and compounds are evaluated for their photoprotective activities. ► Lasallia pustulata extract and gyrophoric acid are valuable UV filters candidates. ► Salazinic acid presents characteristics of a UVA booster.
