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用微环境编程的基于siRNA的水凝用于伤口愈合的时空基因沉默

Zhixuan Xu¹, Weijie Yang¹, Rui Zhang^1,2

¹State Key Laboratory of Chemical Resource Engineering, Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology, Ministry of Education), Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029, China.

Advanced materials (Deerfield Beach, Fla.)

|September 6, 2025

概括

这项研究开发了一种智能水凝系统, 通过控制基因表达和活性氧物种,有效降低炎症并促进组织修复.

科学领域:

生物材料科学
基因治疗
创伤治愈研究

背景情况:

慢性糖尿病伤口表现出过度的炎症和矩阵金属蛋白酶 (MMP) 的过度表达,阻碍了适当的愈合.
目前的治疗方法往往缺乏向的传递和时空控制,限制了复杂的伤口环境的有效性.

研究的目的:

开发一种智能,有氧化还原反应的水凝系统,用于控制siRNA输送,以向糖尿病伤口愈合中的MMP-9.
研究水凝在清除活性氧物种 (ROS) 和实现精确的基因释放方面的双重功能.

主要方法:

制造基于氨酸的水凝 (OR-S凝),其中包含化超分支氨基酸二硫化键 (SS-HPT),用于siRNA复合 (siRMMP-9).
评估ROS清除,氧化还原反应降解和siRMMP-9的受控释放.
在体外和体内评估该系统降低MMP-9的有效性,重塑细胞外基质,加速糖尿病伤口的关闭.

主要成果:

该OR-S凝系统显示出有效的ROS清除和受伤微环境触发的siRMMP-9的控制释放.
观察到MMP-9表达的下调和伤口微环境的显著增强.
在体外和体外模型中都实现了慢性糖尿病伤口的加快愈合.

结论:

开发的智能基因传递系统为无法愈合的糖尿病伤口提供了有前途的治疗策略.
这种方法突显了响应性生物材料在精确基因疗法的潜力.
这项研究为复原医学中先进的基因传递系统的临床转化提供了坚实的基础.

关键词:

其他国家阴性基因载体糖尿病的伤口水凝氧化反应

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相关概念视频

siRNA - Small Interfering RNAs

siRNA - Small Interfering RNAs

Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...