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相关概念视频

mRNA Stability and Gene Expression02:51

mRNA Stability and Gene Expression

6.7K
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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mRNA Stability and Gene Expression02:51

mRNA Stability and Gene Expression

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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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Nuclear Export of mRNA02:31

Nuclear Export of mRNA

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pre-mRNA Processing02:01

pre-mRNA Processing

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In eukaryotic cells, transcripts made by RNA polymerase are modified and processed before exiting the nucleus. Unprocessed RNA is called precursor mRNA or pre-mRNA to distinguish it from mature mRNA.
Once about 20-40 ribonucleotides have been joined together by RNA polymerase, a group of enzymes adds a “cap” to the 5’ end of the growing transcript. In this process, a 5’ phosphate is replaced by modified guanosine that has a methyl group attached to it (7-Methyl...
57.6K
Regulated mRNA Transport02:22

Regulated mRNA Transport

7.0K
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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相关实验视频

Updated: Feb 13, 2026

In Vitro Synthesis of Modified mRNA for Induction of Protein Expression in Human Cells
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针对黑色素瘤RNA疫苗的时间顺序表达mRNA (TOE mRNA).

Xiangdong Zhang1,2, Xucong Teng1,3, Yicong Dai1,3

  • 1Beijing Life Science Academy Beijing 102209 China jhli@mail.tsinghua.edu.cn houhw@blsa.com.cn.

Chemical science
|February 12, 2026
PubMed
概括

这项研究引入了时间顺序表达mRNA (TOE mRNA) 技术. TOE mRNA通过延迟辅助体的表达,增强抗瘤免疫反应来提高疫苗的疗效.

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科学领域:

  • 生物技术是生物技术.
  • 免疫学 免疫学 免疫学
  • 分子生物学分子生物学

背景情况:

  • 改性信使RNA (mRNA) 技术已经彻底改变了疫苗开发.
  • 辅助剂可以促进先天性免疫激活和疫苗的疗效.
  • 低于最佳的疫苗动力学可以通过mTORC1抑制损害mRNA翻译和疫苗效力.

研究的目的:

  • 开发一种新的mRNA平台,以提高疫苗动力学和疗效.
  • 克服与免疫激活时间相关的当前mRNA疫苗设计的局限性.
  • 通过精确控制的表达系统来增强抗瘤免疫反应.

主要方法:

  • 使用ADAR介导的A-to-I基编辑开发时间顺序表达的mRNA (TOE mRNA).
  • 工程mRNA以立即表达抗原和辅助剂,延迟12小时.
  • 在临床前模型中使用TOE mRNA编码瘤新抗原和IL-12辅助剂.

主要成果:

  • TOE mRNA确保了立即的抗原翻译,随后延迟了辅助表达.
  • 延迟辅助剂释放维持mTORC1通路激活和强大的抗原表达.
  • 使用TOE mRNA的疫苗显著增强了抗瘤免疫反应.

结论:

  • TOE mRNA技术提供了一种优化mRNA疫苗动态的策略.
  • 这种方法克服了与过早的先天性免疫过度激活相关的局限性.
  • TOE mRNA代表了下一代高效mRNA疫苗的有希望的平台.