黄金纳米颗粒扰乱了下丘脑POMC细胞中的线粒体活动:对能量平衡的影响
Boglárka Mária Schilling-Tóth1, Silvia Ondrašovičová2, Eszter Vámos3
1Department of Physiology and Biochemistry, University of Veterinary Medicine, H-1078 Budapest, Hungary.
Nanomaterials (Basel, Switzerland)
|August 27, 2025
概括
黄金纳米颗粒 (AuNPs) 扰乱了亲opiomelanocortin (POMC) 神经元中的线粒体功能,影响了下丘脑能量代谢. 这项研究揭示了度和时间对细胞呼吸和ATP产生的影响.
科学领域:
- 纳米医学和神经生物学
- 研究中枢神经系统 (CNS) 中的纳米粒子相互作用
- 探索下丘脑神经内分泌调节中的细胞机制
背景情况:
- 黄金纳米粒子 (AuNPs) 显示出作为细胞内药物载体的潜力,通过血脑屏障 (BBB) 影响中枢神经系统细胞.
- 下丘脑 (HT),特别是亲opiomelanocortin (POMC) 神经元,对系统因素和纳米粒子暴露敏感.
- POMC神经元中的线粒体活动对于对外部刺激和纳米粒子相互作用的反应至关重要.
研究的目的:
- 研究不同金纳米粒子 (AuNP) 度和暴露时间对POMC神经元线粒体活动的体外影响.
- 阐明AuNPs影响细胞代谢和下丘脑功能的机制.
主要方法:
- 使用海马XFp分析仪在1,15,24和48小时暴露期间评估POMC神经元中的线粒体活性.
- 测量反应性氧物种 (ROS) 生产和细胞活力,以评估线粒体功能.
- 对细胞呼吸和能量代谢的AuNP度和时间依赖的影响.
主要成果:
- 黄金纳米粒子暴露显著改变了线粒体活动,以一种依赖于度和时间的方式.
- 观察到早期反应系统,酸循环和质子流量增加,导致线粒体功能障碍.
- 经过AuNP暴露后在POMC细胞中表现出线粒体功能的抑制和ATP的减少.
结论:
- 在POMC神经元中破坏线粒体功能和能量代谢.
- 这些干扰可能会影响代谢功能的下丘脑调节和平衡.
- 这些发现突显出了解纳米粒子与细胞相互作用对于中枢神经系统中安全有效的纳米医学应用至关重要.
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