相关实验视频

Updated: Feb 28, 2026

Mapping the Structure-Function Relationships of Disordered Oncogenic Transcription Factors Using Transcriptomic Analysis

Mapping the Structure-Function Relationships of Disordered Oncogenic Transcription Factors Using Transcriptomic Analysis

Published on: June 27, 2020

抑制EWS的异常转录功能:FLI1蛋白通过设计者polyQ与其同类的融合

Heng-Tong Duan^1,2, Xiang-Le Zhang^1,2, Lei-Lei Jiang¹

¹Key Laboratory of RNA Innovation, Science and Engineering, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai 200031, China.

|February 27, 2026

概括

研究人员开发了多重胺 (polyQ) 融合,以准尤文肉瘤中的EWS::FLI1蛋白. 这些融合将EWS::FLI1隔离,减少其可用性并改变下游基因表达,提供潜在的新疗法策略.

科学领域:

在瘤学瘤学.
分子生物学分子生物学
生物化学生物化学

背景情况:

尤文肉瘤是由EWS::FLI1coprotein驱动的,这是一个化学转录因子,导致异常基因调节.
向EWS::FLI1对于抑制瘤性进展至关重要,但其抑制和清除存在重大挑战.
目前的治疗策略需要新的方法来直接解决EWS::FLI1的致癌功能.

研究的目的:

调查聚氨酸 (polyQ) 融合策略的有效性,以直接准和抑制 EWS::FLI1.1.
设计和制造能够将EWS::FLI1隔离在Ewing肉瘤细胞内的新型聚Q融合蛋白.
评估这些多Q融合对EWS::FLI1细胞可用性和下游基因表达的影响.

主要方法:

采用聚氨酸 (polyQ) 融合策略,使用聚氨酸扩大型亚素-7 (Atx7_93Q-N172) 作为模板.
三种不同的多Q融合蛋白 (Atx7_93Q-N172-SYGQ1,Atx7_93Q-N172-SYGQ2,Atx7_93Q-N172-LCD) 被设计和构建.
实验包括在A673Ewing肉瘤细胞中进行超/颗粒分成和免疫光成像.

主要成果:

设计的多Q融合蛋白与内源性EWS::FLI1在A673细胞中成功地共同沉和共同局部化.
聚聚变将EWS::FLI1隔离到不溶性聚合物中,大大降低了其可溶性细胞可用性.
在Atx7_93Q-N172-LCD融合显著改变了EWS::FLI1下游基因表达,增加P21 (CDKN1A) 和降低c-Myc.

结论:

工程化多Q融合有效地将内源EWS::FLI1蛋白成聚合物,降低其在Ewing肉瘤细胞中的功能溶解分数.
这种封存策略提供了一种新的方法来抑制EWS::FLI1.1的致癌活性.
这项研究为尤宁肉瘤和其他由类似的致癌蛋白驱动的癌症提供了潜在的替代治疗途径.

关键词:

EWS::FLI1 在线服务尤文肉瘤 (Ewing Sarcoma) 是一种癌症.瘤原蛋白蛋白质是一种瘤原蛋白质.聚Q融合聚Q融合蛋白质聚合蛋白质的聚合物封存是一种封存.

更多相关视频

Single-Molecule Imaging of EWS-FLI1 Condensates Assembling on DNA

Single-Molecule Imaging of EWS-FLI1 Condensates Assembling on DNA

Published on: September 8, 2021

Engineering Artificial Factors to Specifically Manipulate Alternative Splicing in Human Cells

Engineering Artificial Factors to Specifically Manipulate Alternative Splicing in Human Cells

Published on: April 26, 2017

相关概念视频

Abnormal Proliferation

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...

Conservative Site-specific Recombination and Phase Variation

Conservative Site-specific Recombination and Phase Variation

Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...

Protein Complexes with Interchangeable Parts

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...