Effects of Vitis vinifera L. leaves extract on UV radiation damage in human keratinocytes (HaCaT)

• Published in: Journal of photochemistry and photobiology. B, Biology Vol. 204; p. 111810
• Main Authors: Marabini, Laura, Melzi, Gloria, Lolli, Federica, Dell'Agli, Mario, Piazza, Stefano, Sangiovanni, Enrico, Marinovich, Marina
• Format: Journal Article
• Language: English
• Published: Switzerland Elsevier B.V 01.03.2020; Elsevier BV
• Subjects: Anti-inflammatory agents; Antioxidants; Antioxidants - chemistry; Antioxidants - pharmacology; Apoptosis; Apoptosis - drug effects; Apoptosis - radiation effects; Carcinogenesis; Carcinogens; Cell cycle; Cell Cycle Checkpoints - drug effects; Cell Cycle Checkpoints - radiation effects; Cell Line; Damage assessment; Deoxyribonucleic acid; DNA; DNA damage; DNA Damage - drug effects; DNA Damage - radiation effects; Genotoxicity; Grapes; Grapevines; Humans; In vitro; Inflammation; Keratinocytes; Keratinocytes - cytology; Keratinocytes - metabolism; Leaves extract; Phenolic compounds; Phenols; Plant Extracts - chemistry; Plant Extracts - pharmacology; Plant Leaves - chemistry; Plant Leaves - metabolism; Polyphenols; Pretreatment; Radiation damage; Scavenging; Seeds; Senescence; Signal transduction; Ultraviolet radiation; Ultraviolet Rays; UVA; UVB; Vitis - chemistry; Vitis - metabolism; Vitis vinifera; Vitis vinifera L; UVB; Vitis vinifera L; UVA; In vitro; Leaves extract; Genotoxicity
• ISSN: 1011-1344; 1873-2682
• DOI: 10.1016/j.jphotobiol.2020.111810

Vitis vinifera L. water extract from red grapevine leaves contains high levels of polyphenols in quantities similar to those found in red grape and grape seeds. Phenolic compounds are the largest group of natural antioxidants with also an anti-inflammatory activity, widely demonstrated both in vitro and in vivo. Interestingly, their antioxidant effect relies not only on the direct radical scavenging activity but also on their ability in modulating cellular signalling transduction pathways. UV radiation exerts multiple effects on skin cells inducing apoptosis, senescence and carcinogenesis. The aim of this study was to investigate the antioxidant and the DNA protective potentials of Vitis vinifera L. water extract against UV-A and UV-B radiation in HaCaT cells, a human keratinocytes cell line. Comet and ɣH2AX assays were used to assess DNA damage in UV irradiated cells pre-treated or not with the extract (100 μg/mL). For UV-B, DNA damage resulted significantly increased at 40 mJ/cm2 dose determining cell cycle arrest and apoptosis. For UV-A, DNA damage was significant at 10 J/cm2 while cell cycle arrest and apoptosis were evident only at 25 J/cm2. The extract (1h of pre-treatment) highlights the antioxidant and scavenger activity on the UV-A, while the maintenance of the apoptosis with both UV-A and UV-B must be interpreted as an anti-mutagenic effect. •UVA and B radiations induce DNA damage with different mechanisms on HaCaT cells.•Vitis vinifera L. extract highlights the antioxidant activity and DNA damage protection.•The apoptotic effect of the extract can be considered as an anti-mutagenic effect.