基于核酸的四面体框架传递系统miRNA-124和中风诱导:针对急性缺血性中风的向治疗
Guannan Du1, Yangxue Yao1, Wen Chen1
1State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China.
ACS applied materials & interfaces
|February 12, 2025
概括
研究人员开发了一种使用四面体框架核酸 (tFNA) 的新型纳米输送系统,用于为急性缺血性中风 (AIS) 治疗提供microRNA-124 (miRNA124). 这种向治疗通过调节微质反应来减少大脑损伤和死亡率.
科学领域:
- 生物医学工程 生物医学工程
- 神经科学是一个神经科学.
- 基因治疗 基因治疗
背景情况:
- 急性缺血性中风 (AIS) 呈现出显著的死亡率和发病率,血栓解压后治疗选择有限.
- 基于微RNA (miRNA) 的疗法对AIS有希望,但在传递效率,稳定性和细胞吸收方面面临挑战.
- 有效的输送系统对于将miRNA疗法转化为神经系统疾病的临床实践至关重要.
研究的目的:
- 开发一种新的微RNA向输送系统,用于急性缺血性中风 (AIS) 治疗.
- 为了提高miRNA124在向和治疗缺血性脑组织的治疗效果.
- 研究该系统在降低AIS中神经元亡和心脏病发作大小方面的潜力.
主要方法:
- 基于核酸 (tFNA) 的四面体框架纳米交付系统的开发.
- 纳米输送系统的功能化,使用中风指导来针对性地输送miRNA124.4.
- 在AIS模型中评估系统在向缺血半球,细胞吸收和治疗效果方面的效率.
主要成果:
- 基于tFNA的纳米递送系统在AIS模型中成功地准并将miRNA124递送到缺血半球.
- 通过tFNA传递miRNA124促进了微质M2极化,减少了促炎M1反应.
- 治疗显著降低了神经元亡,减少了心脏病发作的大小,并降低了AIS中的死亡率.
结论:
- 开发的基于tFNA的纳米递送系统为AIS中的向miRNA递送提供了一个有效的策略.
- 这种方法显示了调节神经炎症和保护免受缺血性脑损伤的潜力.
- 这些发现表明,有希望的治疗途径可以改善急性缺血性中风患者的治疗结果.
相关概念视频
02:30siRNA - Small Interfering RNAs
16.5K
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...
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...
16.5K
01:25Nucleic Acid Structure
5.9K
The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA...
DNA Structure
DNA...
5.9K
02:15Experimental RNAi
6.0K
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
6.0K
01:23RNA Interference
25.9K
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
25.9K