miR-539-5p针对BMP2,通过TGF-β/Smads/MAPK调节B细胞急性淋巴细胞白血病中的Treg激活
Qingkai Dai1,2, Rui Shi1,2, Ge Zhang1,2
1Department of Laboratory Medicine, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China.
Experimental biology and medicine (Maywood, N.J.)
|March 21, 2024
概括
微RNA-539-5p在B细胞急性淋巴细胞白血病 (B-ALL) 中表达不充分,通过增加BMP2促进瘤生长. 然后,这种BMP2激活调节性T细胞 (Tregs),推动B-ALL的进展.
科学领域:
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
背景情况:
- 微RNAs (miRNAs) 涉及到癌症的发展.
- 调控性T细胞 (Tregs) 在B细胞急性淋巴细胞白血病 (B-ALL) 中发挥作用.
- 在B-ALL中调节Tregs的精确miRNA机制需要进一步阐明.
研究的目的:
- 研究miRNAs调节B-ALL中的Tregs的机制.
- 识别特定的miRNA及其参与B-ALL病原发生的基因.
- 分析这些分子相互作用对B-ALL细胞增殖,细胞亡和Treg激活的影响.
主要方法:
- 高通量测序以识别B-ALL.中差异表达的miRNA和目标基因.
- 用于路径丰富和约束关系验证的生物信息分析.
- 在体外细胞培养实验 (纳尔姆-6细胞,人类CD4+CD25-T细胞) 和体内研究以评估miRNA和基因功能.
主要成果:
- 在B-ALL中,miR-539-5p显著表达不足,而其标BMP2在B-ALL中表达过多,与Treg活性相关.
- miR-539-5p直接向BMP2,抑制B-ALL细胞的增殖并促进细胞亡.
- 过度表达的BMP2,与TGF-β1结合,通过TGF-β/Smads/MAPK通路促进Treg激活,最终导致B-ALL的进展.
结论:
- miR-539-5p通过向BMP2.2,在B-ALL中起到瘤抑制作用.
- BMP2通过通过TGF-β/Smads/MAPK信号通路增强Treg激活来促进B-ALL的进展.
- 恢复miR-539-5p水平或抑制BMP2可能代表B-ALL.的潜在治疗策略.
相关概念视频
TGF - β Signaling Pathway
7.3K
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors...
7.3K
Master Transcription Regulators
6.9K
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...
6.9K
Abnormal Proliferation
4.5K
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...
4.5K
MicroRNAs
21.3K
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...
21.3K
Negative Regulator Molecules
35.4K
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.
35.4K


