Estrogen receptor beta (ERbeta) subtype-specific ligands increase transcription, p44/p42 mitogen activated protein kinase (MAPK) activation and growth in human non-small cell lung cancer cells.

Estrogen receptor beta (ERbeta) subtype-specific ligands increase transcription, p44/p42 mitogen activated protein kinase (MAPK) activation and growth in human non-small cell lung cancer cells.
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DOI:
10.1016/j.jsbmb.2009.05.004
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发表时间:
2009-08
影响因子:
4.1
通讯作者:
Nichols, Mark
Nichols, Mark
中科院分区:
生物学2区
文献类型:
--
作者:
Hershberger, Pamela A.;Stabile, Laura P.;Kanterewicz, Beatriz;Rothstein, Mary E.;Gubish, Chris T.;Land, Stephanie;Shuai, Yongli;Siegfried, Jill M.;Nichols, Mark

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在非小细胞肺癌 (NSCLC) 细胞中,17β-雌二醇可增加转录、激活 MAPK 并刺激增殖。我们假设雌激素受体 β (ERβ) 介导这些反应,因为在我们的 NSCLC 细胞系中检测到的是雌激素受体 β (ERβ),而不是 ERα。为了测试这一点,我们确定了 ERβ 选择性激动剂金雀异黄素 (GEN) 和 2,3-双(4-羟基苯基)丙腈 (DPN) 以及 ERα 选择性激动剂 4,4',4"-(4-丙基-[1H]-吡唑-1,3,5-三基)三酚 (PPT) 在 201T 细胞中的作用。这些细胞用 ERα 转染或 ERβ 表达载体和雌激素反应元件 (ERE)-tk-荧光素酶报告构建体在表达 ERα 的细胞中增加荧光素酶活性,但不增加 ERβ GEN 和 DPN 在浓度≤ 10 nM 时选择性增加 ERβ 转染细胞中的荧光素酶活性,表明转录是 GEN 介导的,但不是 PPT 介导的。单独转染 ERE-tk-荧光素酶后报告基因活性增加 1.5 倍,表明内源 PPT 和 DPN 增加 MAPK 磷酸化(分别为 2.5 倍和 3.7 倍),但只有 DPN 刺激体外(p = 0.008)和体内(p = 0.05)的 201T 生长。 201T 细胞对雌激素的反应,并且这两种途径的激活可能是这些细胞增殖增加所必需的。
In non-small cell lung cancer (NSCLC) cells, 17β-estradiol increases transcription, activates MAPK, and stimulates proliferation. We hypothesize that estrogen receptor β (ERβ) mediates these responses because it, but not ERα, is detected in our NSCLC cell lines. To test this, we determined the effects of the ERβ-selective agonists genistein (GEN) and 2,3-bis(4-hydroxyphenyl)propionitrile (DPN) and the ERα-selective agonist 4,4’,4”-(4-propyl-[1H]-pyrazole-l,3,5-triyl)trisphenol (PPT) in 201T cells. The cells were transfected with either an ERα or an ERβ expression vector and an estrogen response element (ERE)-tk-luciferase reporter construct. PPT increased luciferase activity in cells expressing ERα but not ERβ GEN and DPN selectively increased luciferase activity in ERβ-transfected cells at concentrations ≤ 10 nM. Fulvestrant blocked the GEN and DPN-mediated increases, indicating that transcription was ER-dependent. GEN but not PPT mediated a significant 1.5-fold increase in reporter activity upon transfection with ERE-tk-luciferase alone, demonstrating that endogenous ERβ activates transcription. PPT and DPN increased MAPK phosphorylation (2.5-fold and 3.7-fold, respectively). However, only DPN stimulated 201T growth in vitro (p = 0.008) and in vivo (p = 0.05). We conclude that ERβ mediates genomic and non-genomic responses to estrogen in 201T cells and that activation of both pathways may be necessary for increased proliferation of these cells.
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