Δ(9)-Tetrahydrocannabinol disrupts estrogen-signaling through up-regulation of estrogen receptor β (ERβ).

Δ(9)-Tetrahydrocannabinol disrupts estrogen-signaling through up-regulation of estrogen receptor β (ERβ).
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DOI:
10.1021/tx4000446
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发表时间:
2013-07-15
影响因子:
4.1
通讯作者:
Aramaki H
Aramaki H
中科院分区:
医学3区
文献类型:
--
作者:
Takeda S;Yoshida K;Nishimura H;Harada M;Okajima S;Miyoshi H;Okamoto Y;Amamoto T;Watanabe K;Omiecinski CJ;Aramaki H

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据报道,Δ9-四氢大麻酚(Δ9-THC)具有抗雌激素活性,但这些作用的机制尚不清楚。在这项研究中,我们使用雌激素受体α(ERα)阳性的人乳腺癌细胞系MCF-7作为实验模型,并显示Δ9-THC暴露显著抑制17β-雌二醇(E2)诱导的MCF-7细胞增殖。我们证明这些作用是由于Δ9-THC抑制E2配体ERα激活的能力。从机制上讲,从生化分析中获得的数据显示:(i)Δ9-THC上调ERβ(ERα的阻遏物),抑制E2/ERα调节的促进细胞生长的基因的表达,以及(ii)Δ9-THC诱导ERβ在不与E2配体结合位点直接相互作用的情况下调节E2/ERα信号传导。因此,所提供的数据支持Δ9-THC的抗雌激素活性是由E2/ERα信号传导的ERβ破坏介导的概念。
Δ9-Tetrahydrocannabinol (Δ9-THC) has been reported as possessing antiestrogenic activity, although the mechanisms underlying these effects are poorly delineated. In this study, we used the estrogen receptor α (ERα)-positive human breast cancer cell line, MCF-7, as an experimental model and showed that Δ9-THC exposures markedly suppresses 17β-estradiol (E2)- induced MCF-7 cell proliferation. We demonstrate that these effects result from Δ9-THC’s ability to inhibit E2-liganded ERα activation. Mechanistically, the data obtained from biochemical analyses revealed that (i) Δ9-THC up-regulates ERβ, a repressor of ERα, inhibiting the expression of E2/ERα-regulated genes that promote cell growth and that (ii) Δ9-THC induction of ERβ modulates E2/ERα signaling in the absence of direct interaction with the E2 ligand binding site. Therefore, the data presented support the concept that Δ9-THC’s antiestrogenic activities are mediated by the ERβ disruption of E2/ERα signaling.
DOI: 10.1021/tx200046s
发表时间: 2011-06-20
影响因子: 4.1
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影响因子: 9.3
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