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- W4313372173 abstract "Abstract Mast cells are sentinel immune cells that drive normal and pathological inflammatory responses, most notably allergic inflammation. Allergen-induced mast cell activation results in rapid degranulation of preformed pro-inflammatory mediators in the early phase, and sustained release of newly synthesized pro-inflammatory mediators in the late phase. Plant compounds known as polyphenols, have been examined in models of pathology due to their inhibition of pro-inflammatory mediator release. Rosemary extract (RE) and three polyphenolic constituents: carnosic acid (CA), carnosol (CO) and rosmarinic acid (RA) have been found to inhibit signaling cascades required for pro-inflammatory mediator release. The objective of this study was to establish the inhibitory effects of RE in a mast cell model and dissect the polyphenolic mixture, focusing on CA, CO, and RA, evaluating their potential as novel therapeutics. Sensitized mast cells were stimulated with allergen and treated with RE (5–50 μg/ml), CA, CO or RA (1–100 μM). The β-hexosaminidase release assay was used to measure degranulation, and cytokine release was measured by ELISA. Degranulation was inhibited dose dependently to 10% when treated with RE, 14% CA and 17% CO (p<0.001), while RA had no effect. ELISA analysis showed RE and CA inhibit release of IL-6 (p<0.05, p<0.0001), TNF (p<0.05, p<0.0001), and IL-13 (p<0.05, p<0.0001) while CO and RA had no effect. These novel findings identify RE and CA as potent regulators of mast cell functional responses. Further dissecting the mechanism behind RE and CA mediated inhibition of pro-inflammatory mediator release, will support the establishment of these natural plant products as effective anti-inflammatory therapeutics." @default.
- W4313372173 created "2023-01-06" @default.
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- W4313372173 date "2020-05-01" @default.
- W4313372173 modified "2023-09-27" @default.
- W4313372173 title "Attenuation of mast cell degranulation and pro-inflammatory cytokine release by rosemary extract and carnosic acid" @default.
- W4313372173 doi "https://doi.org/10.4049/jimmunol.204.supp.66.6" @default.
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