Alterations ofestradiol-induced histone H3 acetylation in the preoptic area and anteroventral periventricular nucleus of middle-aged female rats.

Alterations ofestradiol-induced histone H3 acetylation in the preoptic area and anteroventral periventricular nucleus of middle-aged female rats.
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雌二醇诱导的中年雌性大鼠视前区和前腹侧室周核组蛋白 H3 乙酰化的改变。

DOI:
10.1016/j.bbrc.2019.06.145
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发表时间:
2019
影响因子:
3.1
通讯作者:
Yan Sun
Yan Sun
中科院分区:
生物学4区
文献类型:
--
作者:
Wen Xu;Jianqin Huang;Lisha Li;Xinyan Zhang;Yan Wang;Guoqing Tong;Yan Sun

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在本研究中,我们研究了 E2 正反馈下下丘脑前部组蛋白 H3 乙酰化的特征,以更好地了解女性生殖衰老中 GnRH 神经元激活减少和基因表达改变的潜在机制。年轻和中年雌性大鼠被切除卵巢(OVX)并用雌二醇(E2)或油治疗。在预期 GnRH 神经元激活时,对 C-Fos 表达、视前区 (POA) 中与 c-Fos 共定位的 GnRH 神经元数量以及 POA 和前腹侧室周核 (AVPV) 中乙酰化组蛋白 H3 细胞的数量进行定量。我们使用实时PCR来评估Esr1靶基因(包括Kiss1和VGluT2)以及下丘脑前部中称为Esr1核心调节子的基因的表达。我们的结果表明,在年轻雌性中,E2 显着增加 POA 和 AVPV 中的组蛋白 H3 乙酰化,与 POA 中 c-Fos 和 GnRH 神经元激活的增加一致。在中年女性中,POA 中 E2 诱导的组蛋白 H3 乙酰化减少,但 AVPV 中没有显着改变。这与 POA 中 c-Fos 表达和表达 c-Fos 的 GnRH 细胞数量的减少以及动物下丘脑前部中 Kiss1 和 VGluT2 mRNA 表达的下调有关。 E2 导致年轻女性下丘脑前部 Ncoa2 和 Crebbp mRNA 表达显着降低,但中年女性则不然。综上所述,这些数据表明,中年下丘脑前部 POA 和 AVPV 中组蛋白 H3 乙酰化的改变以及 Ncoa2 和 Crebbp 无法对 E2 做出反应,部分导致了女性随着生殖衰老而发生的 GnRH 神经元激活下降和 E2 靶基因表达变化。
In this study we investigated the characteristics of histone H3 acetylation in the anterior hypothalamus under E2 positive feedback to gain a better understanding of the mechanism underlying reduced GnRH neuron activation and altered gene expression in female reproductive aging. Young and middle-aged female rats were ovariectomized (OVX) and treated with estradiol (E2) or oil. C-Fos expression, the number of GnRH neurons co-localized with c-Fos in the preoptic area (POA), and the number of acetylated histone H3 cells in the POA and anteroventral periventricular nucleus (AVPV) were quantified at the time of the expected GnRH neuron activation. We used real-time PCR to evaluate the expression ofEsr1target genes includingKiss1andVGluT2and genes known asEsr1coregulators in the anterior hypothalamus. Our results show that in the young females, E2 markedly increased histone H3 acetylation in the POA and AVPV, coincident with increased c-Fos and GnRH neuron activation in the POA. In middle-aged females, E2-induced histone H3 acetylation was reduced in the POA but was not significantly altered in the AVPV. This occurred in association with a reduction of c-Fos expression and the number of GnRH cells expressing c-Fos in the POA as well as a down-regulation ofKiss1andVGluT2mRNA expression in the anterior hypothalamus of the animals. E2 caused significant decreases inNcoa2andCrebbpmRNA expression in the anterior hypothalamus of young, but not middle-aged females. Taken together, these data suggest that alterations of histone H3 acetylation in the POA and AVPV and the inability ofNcoa2andCrebbpto respond to E2 in the middle-aged anterior hypothalamus partially contribute to the decline of GnRH neuron activation and E2 target gene expression changes that occur in female along with reproductive aging.
受体三重敲除小鼠评估性类固醇激素的作用。
DOI: --
发表时间: 2010
期刊:
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Matsumoto T.Androgen;Estrogen
通讯作者: Estrogen
DOI: 10.1210/en.2014-1017
发表时间: 2014-09-01
期刊: ENDOCRINOLOGY
影响因子: 4.8
作者:
Kermath, Bailey A.;Riha, Penny D.;Gore, Andrea C.
通讯作者: Gore, Andrea C.
DOI: 10.1016/j.molcel.2016.05.013
发表时间: 2016-06-02
期刊: Molecular cell
影响因子: 16
作者:
Booth LN;Brunet A
通讯作者: Brunet A
DOI: 10.1126/science.1186088
发表时间: 2010-05-07
期刊: SCIENCE
影响因子: 56.9
作者:
Peleg, Shahaf;Sananbenesi, Farahnaz;Fischer, Andre
通讯作者: Fischer, Andre