基基编辑突变基因映射等位基因调整人体T细胞功能
Ralf Schmidt1,2, Carl C Ward3, Rama Dajani4
1Gladstone-UCSF Institute of Genomic Immunology, San Francisco, CA, USA. ralf.schmidt@meduniwien.ac.at.
Nature
|December 13, 2023
概括
研究人员开发了一种基编辑突变发生平台,以确定调节T细胞激活的核酸. 这种方法确定了调节免疫细胞功能的关键氨基酸残留物和域,可能加速免疫疗法设计.
科学领域:
- 免疫学
- 分子生物学
- 基因工程
背景情况:
- 通过CRISPR查,可以识别控制T细胞功能的基因,以确定免疫治疗的点.
- 需要新的方法来研究关键基因内的特定核酸序列.
- 人类T细胞中的系统性突变可以揭示调节特定表型的等位基因.
研究的目的:
- 开发一个大规模的基编辑突变发生平台,用于识别调整T细胞激活的核酸.
- 确定特定的氨基酸残留物调节T细胞激活和细胞因子的产生.
主要方法:
- 为基因编辑器生成了约117,000个单指导RNA分子的库,针对385个T细胞相关基因的蛋白质编码位点.
- 在人类T细胞中进行了系统的基编辑突变.
- 使用一个基础编辑器来实现更高分辨率的选.
主要成果:
- 在蛋白质的关键残留物 (例如,PIK3CD,VAV1,LCP2,PLCG1,DGKZ) 中发现了许多具有变异性的等位基因,包括功能增益和丧失突变.
- 证明基编辑成功可以积极和消极地调节T细胞细胞毒性功能.
- 通过更高分辨率的查揭示了特定的结构域和调节T细胞功能的蛋白质-蛋白质相互作用位点.
结论:
- 主要免疫细胞中的基编辑屏幕提供了T细胞调节的生物化学洞察力.
- 这一平台有可能加速新型免疫疗法的设计和开发.
- 特定的核酸和残留物可以针对治疗目的微调T细胞功能.
相关概念视频
In-vitro Mutagenesis
13.9K
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
13.9K
Mismatch Repair
4.9K
Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
4.9K


