Abstract
In skin inflammation, vascular endothelial growth factor (VEGF) and CXCL-8/IL-8 play an important role and are produced by activated keratinocytes. Extracts from Ginkgo biloba leaves (GBE), widely used in phytotherapy, have been reported to exert antioxidant and anti-inflammatory properties in the skin. We therefore evaluated the effects of GBE on the release of VEGF and CXCL8/IL-8 by normal human keratinocytes (NHKs) activated by tumor necrosis factor α (TNFα). Moreover, as we previously showed that epigallocatechin-3-gallate (EGCG) reduces VEGF and CXCL8/IL-8 secretion in TNFα-activated NHKs, we also tested its effect in association with GBE. Our results showed that GBE exerted a potent inhibition on VEGF and CXCL8/IL-8 levels in activated cells. In association with EGCG, GBE down-regulated VEGF and CXCL8/IL-8 levels in a cumulative manner in TNFα-stimulated NHKs. These results suggest that GBE, alone or in association with EGCG may contribute to moderate inflammatory processes in skin diseases associated with angiogenesis.
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Abbreviations
- BPE:
-
Bovine pituitary extract
- COX:
-
Cyclooxygenase
- EGCG:
-
Epigallocatechin-3-gallate
- EGF:
-
Epidermal growth factor
- ELISA:
-
Enzyme-linked immunosorbent assays
- GBE:
-
Ginkgo biloba extract
- IL:
-
Interleukin
- MTT:
-
3-(4, 5-Dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide
- NHK:
-
Normal human keratinocyte
- PG:
-
Propylene glycol
- TNFα:
-
Tumor necrosis factor α
- UV:
-
Ultraviolet
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We thank pediatric service (Tbis) of Edouard Herriot Hospital in Lyon for their cooperation in collecting skin biopsy samples.
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The authors declare that they have no conflict of interest.
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Trompezinski, S., Bonneville, M., Pernet, I. et al. Gingko biloba extract reduces VEGF and CXCL-8/IL-8 levels in keratinocytes with cumulative effect with epigallocatechin-3-gallate. Arch Dermatol Res 302, 183–189 (2010). https://doi.org/10.1007/s00403-009-0979-x
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DOI: https://doi.org/10.1007/s00403-009-0979-x