了解脂质纳米颗粒的制造过程,用于mRNA交付,使用机器学习
Shinya Sato1, Syusuke Sano1, Hiroki Muto2
1Formulation Research Laboratory, Pharmaceutical Science and Technology Unit, Eisai Co., Ltd.
Chemical & pharmaceutical bulletin
|June 5, 2024
概括
为mRNA疫苗制造脂质纳米颗粒 (LNP) 需要优化参数. 机器学习识别了诸如乙醇度和pH等关键因素,从而能够精确控制LNP大小,从而改善mRNA传递和蛋白质表达.
科学领域:
- 生物技术是生物技术.
- 纳米技术纳米技术
- 生物化学 生物化学
背景情况:
- 脂质纳米颗粒 (LNP) 对于mRNA疫苗的输送至关重要,保护mRNA并促进细胞吸收.
- 目前的LNP制造涉及复杂的上游 (微流体) 和下游 (透析) 过程,具有众多参数.
- 优化这些参数是实现一致,高质量的LNP的挑战.
研究的目的:
- 使用机器学习识别影响mRNA-LNP质量的关键制造参数.
- 为特定的LNP尺寸建立最佳的制造条件.
- 为了研究LNP大小对mRNA蛋白质表达的影响.
主要方法:
- 使用微流体装置进行mRNA-LNP制造.
- 使用极端梯度提升 (XGBoost) 来识别重要的过程参数.
- 应用贝叶斯优化来推导目标LNP大小 (80和200nm) 的制造条件.
主要成果:
- XGBoost确定了乙醇度 (流量比),缓冲 pH 和总流量为影响颗粒大小和封装效率的关键因素.
- 贝叶斯优化成功确定了产生大约80nm和200nm的LNP的条件.
- 发现LNP颗粒大小显著影响细胞中的mRNA蛋白表达水平.
结论:
- 机器学习和贝叶斯优化为开发mRNA-LNP制造过程提供了有效的策略.
- 通过优化制造来精确控制LNP大小,对于有效的mRNA输送和治疗结果至关重要.
- 这种方法有助于快速有效地开发mRNA-LNP技术.
相关概念视频
MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
RNA Interference
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...
pre-mRNA Processing
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 guanosine). This 5’ cap helps the...
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 guanosine). This 5’ cap helps the...
Experimental RNAi
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...
MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
Nucleic Acid Structure
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 has a double-helix structure. The...
DNA Structure
DNA has a double-helix structure. The...


