关于mRNA疫苗质量控制的研究进展
Chaoying Hu1,2,3,4, Yu Bai1,5, Jianyang Liu1
1Institute of Biological Products, Division of Hepatitis and Enterovirus Vaccines, National Institutes for Food and Drug Control, Beijing, China.
Expert review of vaccines
|May 11, 2024
概括
传递 RNA (mRNA) 疫苗的质量控制对于高质量的开发至关重要. 本次审查涵盖了线性,自我放大和循环RNA疫苗质量控制,突出了当前的挑战和未来的方向.
科学领域:
- 生物技术是生物技术.
- 疫苗学 疫苗学 疫苗学
- 分子生物学分子生物学
背景情况:
- 使者RNA (mRNA) 疫苗技术已经取得了显著的进步,COVID-19大流行加速了其应用.
- 设计质量 (QbD) 框架和标准化质量控制对于高质量的mRNA疫苗开发至关重要.
研究的目的:
- 总结对线性,自我放大和循环RNA疫苗的质量控制方面的研究进展.
- 确定mRNA疫苗质量控制中的相关挑战和考虑因素.
主要方法:
- 对不同类型的mRNA疫苗的质量控制策略进行当前研究的审查.
- 对mRNA疫苗标准化和测试开发的挑战进行分析.
主要成果:
- 线性mRNA疫苗面临着不清楚的降解模式和缺乏标准化测试对dSRNA和T7RNA聚合酶等杂质的挑战.
- 自强化mRNA疫苗需要专注于体内和体外稳定性控制.
- 循环RNA疫苗需要优化标准化试验和参考标准来确定循环化程度.
结论:
- 标准化质量控制协议对于持续开发高质量的mRNA疫苗至关重要.
- 解决每个mRNA疫苗类型的特定挑战对于它们的成功应用和未来的进步至关重要.
相关概念视频
02:31Nuclear Export of mRNA
7.7K
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...
7.7K
02:24Regulation of Expression Occurs at Multiple Steps
22.6K
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
22.6K
02:51mRNA Stability and Gene Expression
5.6K
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
Cis-acting Elements involved in mRNA stability
5.6K
02:28Leaky Scanning
5.1K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.1K
01:23Regulation of Expression at Multiple Steps
893
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
893
02:07Improving Translational Accuracy
10.2K
Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
10.2K