可编程的转录-翻译主动传感器用于哺乳动物的miRNA-响应基因成像和治疗学
Xiaorui Shi1,2, Chong Hu1, Bin Guo3
1Engineering Research Center of Molecular and Neuroimaging, Ministry of Education, School of Life Science and Technology, Xidian University, Xi'an 710071, China.
ACS sensors
|May 28, 2025
概括
这项研究引入了一个可编程的合成基因电路,用于实时miRNA监测和治疗性基因传递. 该miCU系统可实现精确的疾病诊断和治疗,增强合成生物学应用.
科学领域:
- 合成生物学 合成生物学
- 分子工程是分子工程.
- 生物技术是生物技术.
背景情况:
- 目前的合成基因电路面临效率和应用范围的限制,因为它们依赖外部调节器或抑制剂.
- 开发模块化和可编程的基因调节系统对于推进合成生物学应用至关重要.
研究的目的:
- 开发一种新的,可编程的miRNA响应基因调节平台 (miCU传感器系统).
- 为了证明系统在生物过程中对特定的微RNA (miRNA) 实时监测的能力.
- 展示该系统在向治疗基因传递和综合疾病诊断和治疗方面的潜力.
主要方法:
- 设计了一个利用Gal4-VP16基因元素进行转录-翻译调节的miCU传感器系统.
- 在神经分化过程中实现了miR-9和miR-124a的实时监测.
- 编程系统以替换功能基因 (例如,P21用于细胞循环停止) 并将特定的miRNA (例如,miR-155) 向治疗基因 (例如,Nrf2).
主要成果:
- 在神经分化过程中实现了低背景信号的特定miRNAs的实时,有针对性的监测.
- 通过替代功能基因,证明了miRNA介导的细胞循环停止和抑制瘤细胞中的细胞迁移.
- 在使用可编程miCU系统的急性肝损伤小鼠模型中成功集成疾病诊断和治疗.
结论:
- 该miCU系统提供了一个可编程和多功能平台,用于miRNA响应基因调节.
- 这种平台可以实现精确的疾病诊断和治疗干预.
- 开发的系统代表了推进精密医学和合成生物学的强大工具.
相关概念视频
01:22MicroRNAs
3.1K
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...
3.1K
02:11Reporter Genes
11.9K
Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
11.9K
01:29Translational Regulation
113
Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...
113