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相关概念视频

Regulated mRNA Transport02:22

Regulated mRNA Transport

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In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to the cytoplasm for protein synthesis. Before transport, a pre-mRNA undergoes several steps of post-transcriptional modifications including splicing, 5' capping, and the addition of a poly-adenine tail. Various proteins bind to the pre-mRNA during these modifications. The mRNA transport takes place with the help of multiple proteins playing...
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mRNA Stability and Gene Expression02:51

mRNA Stability and Gene Expression

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The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
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Nuclear Export of mRNA02:31

Nuclear Export of mRNA

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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...
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Nonsense-mediated mRNA Decay02:27

Nonsense-mediated mRNA Decay

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The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
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Nucleic Acid Structure01:25

Nucleic Acid Structure

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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...
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RNA Stability01:53

RNA Stability

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Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
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相关实验视频

Updated: Jun 3, 2025

Synthesis and Characterization of mRNA-Loaded PolyBeta Aminoesters Nanoparticles for Vaccination Purposes
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Synthesis and Characterization of mRNA-Loaded PolyBeta Aminoesters Nanoparticles for Vaccination Purposes

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用于mRNA传递的聚合物

Hui Wang1, Yiyun Cheng2

  • 1South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou, China.

Wiley interdisciplinary reviews. Nanomedicine and nanobiotechnology
|January 7, 2025
PubMed
概括
此摘要是机器生成的。

功能性聚合物正在推进新药的信使RNA (mRNA) 输送. 本综述涵盖了有效的mRNA疗法的可生物降解和混合纳米结构,强调了未来的前景.

关键词:
药物输送是药物输送的过程.细胞内释放的细胞内释放.它们是mRNARNA.纳米颗粒是一种纳米粒子.聚合物是一种聚合物.

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相关实验视频

Last Updated: Jun 3, 2025

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Synthesis and Characterization of mRNA-Loaded PolyBeta Aminoesters Nanoparticles for Vaccination Purposes

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Generation of Cationic Nanoliposomes for the Efficient Delivery of In Vitro Transcribed Messenger RNA
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科学领域:

  • 生物技术和制药科学 生物技术和制药科学
  • 纳米医学和药物输送系统

背景情况:

  • 使者RNA (mRNA) 疗法通过指示细胞产生治疗性蛋白质,为医学提供了一种新的方法.
  • 将mRNA有效地输入细胞对于实现其治疗潜力至关重要.
  • 目前的输送方法在平衡mRNA结合和受控释放方面面临挑战.

研究的目的:

  • 审查功能性聚合物的最新进展,以实现高效的mRNA输送.
  • 总结生物降解和低分子量聚合物的设计原则,用于mRNA治疗.
  • 探索聚合物/脂质混合纳米结构和基于聚合物的mRNA传递系统的未来方向.

主要方法:

  • 文献综述侧重于基于聚合物的mRNA传递系统的最新研究.
  • 对影响mRNA结合,稳定性和细胞吸收的聚合物特性进行分析.
  • 对混合纳米结构的检查,将聚合物和脂质结合起来,以增强交付.

主要成果:

  • 功能性聚合物,包括可生物降解和低分子量类型,显示出对控制的mRNA输送的希望.
  • 聚合物/脂质混合纳米结构利用两种材料类型的优势,改善mRNA治疗方法.
  • 关键的设计考虑包括优化聚合物的有效结合,保护和释放mRNA的能力.

结论:

  • 功能性聚合物对于mRNA传递技术的进步至关重要.
  • 在聚合物设计和混合系统的持续创新对于克服当前挑战至关重要.
  • 开发有效的基于聚合物的mRNA输送系统对未来的治疗有很大的前景.