打破骨质细胞-酸恶性循环,通过基于酸响应的有机框架的中和和基因编辑平台来拯救骨质疏松症
Wenzheng Lin1,2,3, Sihan Hu4, Ke Li1,2
1Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|December 21, 2023
概括
这项研究开发了新的纳米颗粒来中和酸性骨微环境并抑制RANKL,有效地逆转小鼠骨质疏松症. 这种方法提供了一种新的策略,通过促进骨形成和减少骨再吸收来治疗骨损失.
科学领域:
- 生物材料科学 生物材料科学
- 纳米技术 纳米技术
- 骨质疏松症研究 骨质疏松症研究
背景情况:
- 骨质疏松症的特征是由骨质细胞形成的酸性微环境,导致骨质损失和骨质细胞活动增加.
- 这种酸性环境促进了活性氧物种 (ROS) 生产,骨质细胞衰老,以及核因子卡帕-B连接体 (RANKL) 生产的受体激活剂,从而创造了一个恶性循环.
研究的目的:
- 开发一种酸反应和中和系统,用于体内基因编辑治疗骨质疏松症.
- 针对酸性微环境和RANKL生产,打破骨质损失的循环.
主要方法:
- 将二碳酸 (NaHCO3) 和RANKL-CRISPR/Cas9 (RC) 等离子体装入一个金属有机框架 (ZIF8) 中.
- 评估纳米颗粒 (ZNC) 它们在酸性条件下中和酸性,抑制ROS产生和增强基因转移的能力.
- 使用微型CT成像评估ZNC在卵巢切除小鼠的治疗效果.
主要成果:
- ZIF8-NaHCO3@Cas9 (ZNC) 有效地中和了酸性微环境,并抑制了ROS的产生.
- 装有NaHCO3和等离子体的纳米粒子在酸性环境中显示出更高的转染效率,而不是仅含等离子体的纳米粒子.
- 微CT分析表明,在接受治疗的小鼠中,骨体积损失的完全逆转.
结论:
- 开发的纳米粒子有效地中和了酸性微环境,通过促进骨质生成和抑制骨质溶解,为骨保护提供了双向方法.
- 这项研究介绍了一种用于骨质疏松症治疗的新型纳米粒子系统,为生物医学和临床应用提供了新的见解.
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