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饮食中的铜对大鼠青春期的开始:可能的机制

Rui Sun^1,2,3, Zhongshen Wang^1,2,3, Cheng Li^1,2,3

¹College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China.

|November 27, 2025

概括

饮食中补充铜,特别是45mg/kg,促进了老鼠更早的青春期发作. 这通过激活下丘脑蛋白激酶C (PKC) 途径来发生,该途径增强KISS-1/GPR54-激素释放激素 (GnRH) 系统并减少GABAergic抑制,促进生殖激素分泌.

科学领域:

生殖内分泌学生殖内分泌学
微量元素的新陈代谢
神经内分泌学神经内分泌学

背景情况:

铜对生殖健康至关重要,但它在调节下丘脑-垂体-卵巢 (HPOA) 轴上的确切作用尚未完全理解.
研究铜影响生殖过程的分子机制对于理解其生理影响至关重要.

研究的目的:

阐明饮食中的铜影响HPOA轴和生殖激素分泌的机制.
确定最佳的食铜度,以促进青春期的开始和提高大鼠的生殖功能.

主要方法:

在体内:Sprague Dawley大鼠被食不同度的铜 (0-60毫克/公斤),以评估青春期的开始和荷尔蒙水平.
实验室内:培养下丘脑神经元并暴露在不同度的铜中,以及PKC调节剂,以研究细胞反应.
技术包括CCK-8测定,ELISA,西式涂抹和转录学来分析细胞活力,荷尔蒙分泌,蛋白质表达和基因通路.

主要成果:

饮食中的铜摄入量对青春期的发病有剂量依赖的影响,45 mg/kg导致最早发病和生殖激素水平升高 (GnRH,FSH,LH,E2).
转录组分析显示,在下丘脑中,GnRH信号传递和GABAergic通路的显著丰富.
铜可以调高KISS-1,GPR54和PKC的表达,同时降低GABA/GABA-R的表达,并通过PKC调节激活下丘脑神经元中的KISS-1/GPR54-GnRH系统.

结论:

摄入45毫克/千克的食铜通过调节下丘脑路径,促进大鼠的青春期开始.
该机制涉及激活PKC通路,该通路抑制GABAergic神经传递,并刺激KISS-1/GPR54-GnRH系统.
这最终增强了HPOA轴活动和淋巴激素分泌,强调了铜在生殖神经内分泌学中的关键作用.

关键词:

对于GABA来说,这是一个很好的选择.在HPOA轴上.在KISS-1/GPR54中使用.在 PKC PKC 中,你会发现.

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