m5C-修饰的tRF3b-CysGCA-23 通过通过稳定RBM4抑制H3K18乳糖分来抑制膀癌恶性病变
Xiaoling Ying1,2, Yapeng Huang3, Jian Huang4,5
1Department of Urology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|February 27, 2026
概括
一种新型分子,m5C修饰的tsRNA (mtRC),在膀癌 (BC) 中被降低调节,并起到瘤抑制作用. 它通过mtRC/RBM4/H3K18la/IL1RAP&VASH2轴发挥作用,为BC提供了潜在的治疗点.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 转移RNA (tRNA) 和tRNA衍生的小RNA (tsRNA) 的表观遗传修饰与癌症的发展有关.
- 在膀癌 (BC) 中,m5C-修饰的tsRNAs的特定作用和调控机制在很大程度上是未知的.
研究的目的:
- 在膀癌中识别和表征一种新的m5C修饰的tsRNA.
- 阐明这个tsRNA在BC进展中的生物功能和调节途径.
主要方法:
- 在BC组织和尿样中识别和表达m5C修饰的tsRNAs的分析.
- 在体外和体外功能测试以确定已识别的tsRNA的瘤抑制作用.
- 涉及RNA与蛋白质结合,无处不在,基因表达分析和表观遗传修饰试验的机制研究.
主要成果:
- 一种新的m5C修饰的tsRNA,m5C-tRF3b-CysGCA-23 (mtRC),被确定并发现在BC.显著下调.
- 与其未经修改的对应物不同,mtRC表现出抑制瘤的功能.
- NSUN6调节mtRC的丰富性,这反过来又通过抑制其无处不在来稳定RBM4.
- mtRC/RBM4轴通过降低糖解和H3K18乳化来抑制BC恶性瘤,从而减弱基因表达 (IL1RAP和VASH2).
结论:
- mtRC在膀癌中起着关键的瘤抑制作用.
- 一个控制BC恶性瘤的新型调节轴 (mtRC/RBM4/H3K18la/IL1RAP&VASH2) 已经被发现.
- mtRC是膀癌的潜在诊断生物标志物和治疗点.
相关概念视频
Abnormal Proliferation
5.3K
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...
5.3K
The Retinoblastoma Gene
4.8K
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
4.8K
Receptor Downregulation in MVBs
2.9K
Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
2.9K
Master Transcription Regulators
7.9K
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...
7.9K
Negative Regulator Molecules
38.7K
Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
38.7K
Loss of Tumor Suppressor Gene Functions
6.2K
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
6.2K


