具体的には,細胞状態に反応する合成プロモーターの設計のための体系的な枠組みは,T細胞の枯渇の主要な調節体を明らかにします
Zhaoyu Zhang1, Xiaoyu Qiu1, Hui Ning1
1MOE Key Laboratory of Bioinformatics and Bioinformatics Division Center for Synthetic and Systems Biology Department of Automation Beijing National Research Center for Information Science and Technology Tsinghua University Beijing China.
Quantitative biology (Beijing, China)
|February 12, 2026
まとめ
研究者らは,T細胞の枯渇を特に標的とする合成プロモーターを作成するために,機械学習を用いたフレームワークSPECIFICを開発しました. これらのプロモーターは遺伝子発現を制御することができ,T細胞機能不全に対処することによってCAR-T細胞治療を強化するための新しい戦略を提供します.
科学分野:
- 免疫学 免疫学とは
- 合成生物学 合成生物学とは
- コンピュータ生物学 コンピュータ生物学
背景:
- 細胞状態に特化した合成プロモーターの設計は,細胞研究にとって不可欠ですが,特にT細胞枯渇のような複雑な状態では,依然として挑戦的です.
- T細胞の枯渇は,特にCAR-T細胞療法のような治療において,免疫反応を損なう.
研究 の 目的:
- 細胞状態特有の合成プロモーターの体系的な識別と検証のための統合フレームワーク (SPECIFIC) を開発する.
- 潜在的な治療用途のためにT細胞の枯渇を感知し,それに反応できる合成プロモーターを設計する.
主な方法:
- レバレッジされたクロマチンのアクセシビリティプロファイリングと機械学習により,T細胞枯渇に関連する転写因子結合モチーフを特定します.
- 特定されたモチーフを使用して,疲労反応性遺伝子回路を駆動するために設計された合成プロモーター.
- マウスOT-IおよびヒトCAR-T細胞モデルにおけるプロモーター特異性と機能を検証した.
主要な成果:
- T細胞枯渇に関連した56の保存された転写因子結合モチーフを特定しました.
- エンジニアリングされた合成プロモーター,特にNFATc2またはMEF2C結合部位を有するプロモーターは,枯渇したT細胞に対して高い特異性を示した.
- これらの合成プロモーターは,CAR発現と疲労マーカーを減少させることで,T細胞機能不全を緩和することが示されています.
結論:
- 細胞状態特有の規制要素を設計するための一般化可能なアプローチを確立した.
- T細胞機能不全と戦うために,遺伝子発現のプログラム制御を通じて,CAR-T細胞治療を改善するための新しい戦略を提供した.
さらに関連する動画
関連する概念動画
Cell Specific Gene Expression
16.6K
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
16.6K
Cell Specific Gene Expression
5.6K
5.6K
The Eukaryotic Promoter Region
19.0K
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...
19.0K
pH Regulation in Cells
7.8K
pH plays a critical role in maintaining normal cellular activities. It helps maintain the structure and function of various proteins, dictates the charge on cellular membranes, and is crucial for metabolic reactions inside the cell. Moreover, cells use the energy from the proton motive force to generate ATP.
Cytosolic pH
Under physiological conditions, the cytosolic pH is slightly more acidic than the extracellular pH. However, cells must prevent further acidification of their cytosol to...
Cytosolic pH
Under physiological conditions, the cytosolic pH is slightly more acidic than the extracellular pH. However, cells must prevent further acidification of their cytosol to...
7.8K
Master Transcription Regulators
7.8K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
7.8K
Regulated Protein Degradation
8.9K
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
8.9K


