In vitro protective effects of two extracts from bergamot peels on human endothelial cells exposed to tumor necrosis factor-alpha (TNF-alpha).
Bergamot ( Citrus bergamia Risso) is a less commercialized Citrus fruit, mainly used for its essential oil extracted from the peel. Bergamot peel (BP) represents about 60% of the processed fruits and is regarded as primary waste. However, it contains good amounts of useful compounds, such as pectins and flavonoids. Many of the bioactivities of Citrus flavonoids appear to impact vascular endothelial cells. Herein, we report the protective effect of two flavonoid-rich extracts from BP (endowed with radical-scavenging properties and lacking genotoxic activity) against alterations in cell modifications induced by the pleiotropic inflammatory cytokine tumor necrosis factor-alpha (TNF-alpha) on human umbilical vein endothelial cells (HUVECs), as demonstrated by monitoring intracellular levels of malondialdehyde/4-hydroxynonenal, reduced and oxidized glutathione and superoxide dismutase activity, and the activation status of nuclear factor-kappaB (NF-kappaB). Thus, BP appears to be a potential source of natural antioxidant/anti-inflammatory phytocomplexes to be employed as ingredients of nutraceutical products or functional foods.
Trombetta
Domenico
D
Department Farmaco-Biologico, University of Messina, Viale Annunziata, 98168 Messina, Italy.
Cimino
Francesco
F
Cristani
Mariateresa
M
Mandalari
Giuseppina
G
Saija
Antonella
A
Ginestra
Giovanna
G
Speciale
Antonio
A
Chirafisi
Joselita
J
Bisignano
Giuseppe
G
Waldron
Keith
K
Narbad
Arjan
A
Faulds
Craig B
CB
D002460:Cell Line; D002957:Citrus / Q000737:chemistry*; D042783:Endothelial Cells / Q000187:drug effects* / Q000378:metabolism; D005638:Fruit / Q000737:chemistry; D006801:Humans; D010936:Plant Extracts / Q000494:pharmacology*; D020011:Protective Agents / Q000494:pharmacology*; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology*
D010936:Plant Extracts; D020011:Protective Agents; D014409:Tumor Necrosis Factor-alpha