核心脂纳米颗粒的工程内部架构促进了高效的mRNA内体释放
Tianyao Li1,2, Jingxin Zhang1,3, Jing Guo4
1CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), Chinese Academy of Sciences (CAS), Beijing, China.
Nature communications
|January 30, 2026
概括
新的脂质纳米颗粒 (LNP) 与金纳米颗粒核心通过增强内体逃生来改善信使RNA (mRNA) 传递. 这一突破提高了mRNA表达和治疗疗效,用于疫苗和癌症治疗.
科学领域:
- 生物技术是生物技术.
- 纳米医学是一种纳米医学.
- 药物运输 药物运输 药物运输
背景情况:
- 传递 RNA (mRNA) 疗法需要像脂质纳米粒子 (LNP) 这样的高效传递载体.
- 低效的内体体逃生限制了mRNA进入细胞质的机会,阻碍了治疗潜力.
- 现有无形核的LNP与质子驱动的膜破坏作斗争.
研究的目的:
- 设计具有改进内部结构的新型LNP,以增强mRNA传递.
- 研究可离子化脂涂金纳米颗粒 (IC-AuNPs) 作为LNP中的刚性,pH响应的核心的作用.
- 在mRNA治疗中克服内体体逃逸的瓶.
主要方法:
- 开发使用IC-AuNP作为内部核心的核心外LNP.
- 对LNP架构和pH响应性质的表征.
- 在体外和体内对内体逃逸,mRNA扩散和治疗结果的评估.
主要成果:
- 与传统的LNP相比,工程Au-core LNP的内体体逃逸率增加了两倍.
- 通过Au-LNPs实现了大约100倍的细胞质mRNA扩散.
- 增强了体外mRNA表达,使体内蛋白质生产增加了多达七倍.
- 在三阴性乳腺癌模型中改善了对SARS-CoV-2疫苗的抗体反应和治疗疗效.
结论:
- 新型Au-LNP架构显著提高mRNA内体逃生和细胞质递送.
- 这一战略为改善mRNA疗法,包括疫苗和癌症治疗提供了一个有希望的方法.
- 响应pH的刚性金纳米粒子核心是扩大LNP在内体条件下的性能的关键.
相关概念视频
Internal Combustion Engine
2.7K
The internal combustion engine is a heat engine that uses the byproducts of combustion as the working fluid instead of using a heat transfer medium to transfer heat. The combustion is done in a way that produces high-pressure combustion products that can be expanded through a turbine or piston to create work. Internal combustion engines can again be categorized into three kinds: (1) spark ignition gasoline engines, most commonly used in automobiles, (2) compression ignition diesel engines that...
2.7K
Nuclear Export of mRNA
8.8K
Before mRNAs are exported to the cytoplasm, it is crucial to check each mRNA for structural and functional integrity. Eukaryotic cells use several different mechanisms, collectively known as mRNA surveillance, to look for irregularities in mRNAs. Irregular or aberrant mRNA are rapidly degraded by various enzymes. If a defective mRNA escapes the surveillance, it would be translated into a protein which would either be non-functional or not function properly. One of the primary irregularities in...
8.8K
The Eukaryotic Promoter Region
18.8K
The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...
18.8K
Maturation of Endosomes
5.8K
The early endosome containing internalized molecules matures through transformations in its location, morphology, intraluminal pH, and membrane protein composition. Together, these changes result in a more acidic late endosome that contains multiple intraluminal vesicles; therefore, the late endosome is also called a multivesicular body (MVB).
Changes in location
The maturing endosome moves along microtubules from the periphery of the cell towards the perinuclear region. This movement of the...
Changes in location
The maturing endosome moves along microtubules from the periphery of the cell towards the perinuclear region. This movement of the...
5.8K
The Nucleosome Core Particle
14.4K
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
The paradox
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
The paradox
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
14.4K
Internal Receptors
74.6K
Many cellular signals are hydrophilic and therefore cannot pass through the plasma membrane. However, small or hydrophobic signaling molecules can cross the hydrophobic core of the plasma membrane and bind to internal, or intracellular, receptors that reside within the cell. Many mammalian steroid hormones use this mechanism of cell signaling, as does nitric oxide (NO) gas.
74.6K


