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- W2040448204 abstract "Garcinol (camboginol) from the fruit rind of Guttiferae species shows anti-carcinogenic and anti-inflammatory properties, but the underlying molecular mechanisms are unclear. Here we show that garcinol potently interferes with 5-lipoxygenase (EC 7.13.11.34) and microsomal prostaglandin (PG)E2 synthase (mPGES)-1 (EC 5.3.99.3), enzymes that play pivotal roles in inflammation and tumorigenesis. In cell-free assays, garcinol inhibited the activity of purified 5-lipoxygenase and blocked the mPGES-1-mediated conversion of PGH2 to PGE2 with IC50 values of 0.1 and 0.3 μM, respectively. Garcinol suppressed 5-lipoxygenase product formation also in intact human neutrophils and reduced PGE2 formation in interleukin-1β-stimulated A549 human lung carcinoma cells as well as in human whole blood stimulated by lipopolysaccharide. Moreover, garcinol interfered with isolated cyclooxygenase (COX)-1 (EC 1.14.99.1, IC50 = 12 μM) and with the formation of COX-1-derived 12(S)-hydroxy-5-cis-8,10-trans-heptadecatrienoic acid and thromboxane B2 in human platelets. In contrast, neither Ca2+-ionophore (A23187)-induced arachidonic acid release in neutrophils nor COX-2 activity in A549 cells or whole blood, measured as formation of 6-keto PGF1α, or isolated human recombinant COX-2 were significantly affected by garcinol (≤30 μM). Together, the high potency of garcinol to selectively suppress PGE2 synthesis and 5-lipoxygenase product formation provides a molecular basis for the anti-inflammatory and anti-carcinogenic effects of garcinol and rationalizes its therapeutic use." @default.
- W2040448204 created "2016-06-24" @default.
- W2040448204 creator A5034841737 @default.
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- W2040448204 date "2009-05-01" @default.
- W2040448204 modified "2023-10-14" @default.
- W2040448204 title "Identification of 5-lipoxygenase and microsomal prostaglandin E2 synthase-1 as functional targets of the anti-inflammatory and anti-carcinogenic garcinol" @default.
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- W2040448204 doi "https://doi.org/10.1016/j.bcp.2009.02.005" @default.
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