首页> 外文期刊>Brain research >Modulation of estrogen receptors during development inhibits neurogenesis of precursors to GnRH-1 neurones: In vitro studies with explants of ovine olfactory placode.
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Modulation of estrogen receptors during development inhibits neurogenesis of precursors to GnRH-1 neurones: In vitro studies with explants of ovine olfactory placode.

机译:在发育过程中对雌激素受体的调节抑制了GnRH-1神经元前体的神经发生:用绵羊嗅斑外植体进行的体外研究。

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The aim of the present study was to explore the putative effects of agonists and antagonists of the estradiol receptor on the early phase of GnRH-1 neuron development. To address this question we used an in vitro model of GnRH-1 neurons using cultured olfactory placode from sheep embryos on day 26 of gestation. Previous studies on this model have shown that in vitro the development of GnRH-1 neurons mimics in vivo development up to the start of pulsatile GnRH-1 secretion, To address the effects of modulating the estrogen receptor, cultures were treated with the endogenous and synthetic ligands of estradiol receptors: 17beta-estradiol, 17alpha-estradiol and tamoxifen. Neurogenesis was measured by incorporation of [(3)H]-thymidine. Morphometric parameters were evaluated by image analysis. The main results are that antagonism of estradiol receptors induced an important decrease in neurogenesis but had little effect on morphometric parameters, suggesting that during this early phase of development, maternal estrogens are important to achieve correct development of the GnRH-1 neuronal network.
机译:本研究的目的是探讨雌二醇受体激动剂和拮抗剂对GnRH-1神经元发育早期的假定作用。为了解决这个问题,我们在妊娠第26天使用了GnRH-1神经元的体外模型,该模型使用了来自绵羊胚胎的培养嗅觉平台。对该模型的先前研究表明,体外GnRH-1神经元的发育模仿体内发育直至搏动性GnRH-1分泌开始,为解决调节雌激素受体的作用,将培养物用内源性和合成处理雌二醇受体的配体:17β-雌二醇,17α-雌二醇和他莫昔芬。通过掺入[(3)H]-胸苷测量神经发生。通过图像分析评估形态学参数。主要结果是雌二醇受体拮抗作用引起神经发生的重要减少,但对形态参数的影响很小,这表明在发育的早期阶段,母体雌激素对于实现GnRH-1神经元网络的正确发育很重要。

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