chrysoeriol/bröstcancer

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Inhibitory effects of chrysoeriol on DNA adduct formation with benzo[a]pyrene in MCF-7 breast cancer cells.

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Cytochrome P450 (CYP) 1 families including CYP1A1, 1A2 and 1B1 are well known to be deeply involved in the initiation of several cancers, due to the fact that they activate environmental pro-carcinogens to form ultimate carcinogens. Benzo[a]pyrene (BaP) is one of the major classes of prototypical

A methoxyflavonoid, chrysoeriol, selectively inhibits the formation of a carcinogenic estrogen metabolite in MCF-7 breast cancer cells.

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A 17beta-estradiol (E(2)) is hydrolyzed to 2-hydroxy-E(2) (2-OHE(2)) and 4-hydroxy-E(2) (4-OHE(2)) via cytochrome P450 (CYP) 1A1 and 1B1, respectively. In estrogen target tissues including the mammary gland, ovaries, and uterus, CYP1B1 is highly expressed, and 4-OHE(2) is predominantly formed in

Discovery of lesser known flavones as inhibitors of NF-κB signaling in MDA-MB-231 breast cancer cells--A SAR study.

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Seventeen flavonoids with different substitutions were evaluated for inhibition of nuclear factor-κB (NF-κB) signaling in the invasive breast cancer cell line MDA-MB-231. They were screened using an engineered MDA-MB-231 cell line reporting NF-κB activation. The modulation of expression of two NF-κB

Regioselective Glucuronidation of Diosmetin and Chrysoeriol by the Interplay of Glucuronidation and Transport in UGT1A9-Overexpressing HeLa Cells.

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This study aimed to determine the reaction kinetics of the regioselective glucuronidation of diosmetin and chrysoeriol, two important methylated metabolites of luteolin, by human liver microsomes (HLMs) and uridine-5'-diphosphate glucuronosyltransferase (UGTs) enzymes. This study also investigated

Identification of novel dietary phytochemicals inhibiting the efflux transporter breast cancer resistance protein (BCRP/ABCG2).

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Breast cancer resistance protein (BCRP/ABCG2) plays an important role in determining the absorption and disposition of consumed xenobiotics including various drugs and dietary phytochemicals and is also one of the prominent efflux transporters involved in multidrug resistance (MDR). In this study,

Flavonoids and cinnamic acid derivatives as inhibitors of 17beta-hydroxysteroid dehydrogenase type 1.

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17beta-Hydroxysteroid dehydrogenase (17beta-HSD) type 1 converts estrone to estradiol, a potent ligand for estrogen receptors. It represents an important target for the development of drugs for treatment of estrogen-dependent diseases. In the present study, we have examined the inhibitory activities

Selective inhibition of methoxyflavonoids on human CYP1B1 activity.

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Cytochrome P450 (CYP) 1B1 catalyzes 17beta-estradiol (E(2)) to predominantly carcinogenic 4-hydroxy-E(2), whereas CYP1A1 and 1A2 convert E(2) to non-carcinogenic 2-hydroxy-E(2). Hence, selective inhibition of CYP1B1 is recognized to be beneficial for the prevention of E(2) related breast cancer. In

Chemical constituents of Trichosanthes kirilowii and their cytotoxic activities.

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One new lignan, trichobenzolignan (1), and seven known compounds, ligballinol (2), (-)-pinoresinol (3), ehletianol C (4), luteolin 7-O-β-D-glucopyranoside (5), chrysoeriol-7- O-β-D-glucopyranoside (6), 10α-cucurbita-5,24-dien-3β-ol (7), and arvenin I (8). Their structures were established on the

Chemical Constituents and Antidepressant-Like Effects in Ovariectomized Mice of the Ethanol Extract of Alternanthera philoxeroides.

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The previously unreported flavone glycoside, demethyltorosaflavone B (2) and the E-propenoic acid substituted flavone, torosaflavone E (3a), were isolated together with nine previously reported metabolites, including indole-3-carbaldehyde, oleanonic acid, vanillic acid, p-hydroxybenzoic acid,

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