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首页> 外文期刊>Molecular and Cellular Endocrinology >Assessment of the proliferative capacity of the flavanones 8-prenylnaringenin, 6-(1.1-dimethylallyl)naringenin and naringenin in MCF-7 cells and the rat mammary gland
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Assessment of the proliferative capacity of the flavanones 8-prenylnaringenin, 6-(1.1-dimethylallyl)naringenin and naringenin in MCF-7 cells and the rat mammary gland

机译:黄酮8-戊烯基柚皮素,6-(1.1-二甲基烯丙基)柚皮素和柚皮素在MCF-7细胞和大鼠乳腺中的增殖能力评估

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摘要

8-Prenylnaringenin (8-PN) and naringenin (Nar) are phytoestrogens found in food items and nutritional supplements, while 6-(1.1-dimethylallyl)naringenin (6-DMAN) is a component of an African plant. Besides their assumed beneficial effects they may promote mammary and endometrial cancer. We therefore assessed their proliferative and estrogenic potential on the mammary gland in vitro and in vivo. In competitive estrogen receptor (ER) ligand binding assays 8-PN displayed a high relative binding affinity for both ERs with a preference for ER alpha and had the strongest mitotic effect on MCF-7 cells among the test substances. In a three day exposure in young adult ovariectomized female rats 15 mg/kg 8-PN had the highest capacity to increase the number of terminal end buds (TEB) in the mammary gland and stimulated expression of proliferation markers in epithelial ductal cells, followed by 6-DMAN and Nar, but overall their capacity to stimulate proliferation was weak in comparison to 17 beta-Estradiol (E2). (C) 2014 Published by Elsevier Ireland Ltd.
机译:食品和营养补品中发现了8-苯甲基柚皮素(8-PN)和柚皮素(Nar),而6-(1.1-二甲基烯丙基)柚皮素(6-DMAN)是非洲植物的成分。除了假定的有益作用外,它们还可能促进乳腺和子宫内膜癌。因此,我们在体外和体内评估了它们在乳腺中的增殖和雌激素潜力。在竞争性雌激素受体(ER)配体结合试验中,8-PN对两种ER表现出较高的相对结合亲和力,偏爱ERα,并且对受试物质中MCF-7细胞的有丝分裂作用最强。在15毫克/公斤的成年卵巢切除雌性大鼠的三天暴露中,15 mg / kg 8-PN具有最大的增加乳腺末端芽(TEB)数量的能力,并刺激上皮导管细胞中增殖标志物的表达,其次是6-DMAN和Nar,但总体而言,与17β-雌二醇(E2)相比,它们刺激增殖的能力较弱。 (C)2014由爱思唯尔爱尔兰有限公司发行。

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