转录因子MEF2C通过抑制基因酶CDK2抑制微质过度活化,从而抑制微质过度活化
Xiaodan Hu1, Jianchen Wu1, Lu Shi2
1New Cornerstone Science Laboratory, School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, China.
Immunity
|March 26, 2025
概括
微质免疫检查点可以防止神经系统疾病的过度活化. MEF2C损失导致过度激活,但CDK2抑制与BMS265246恢复平衡,为神经炎症提供治疗点.
科学领域:
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
- 遗传学 遗传学 是一个
背景情况:
- 微质免疫检查点对于防止过度活化和维持免疫平衡至关重要.
- 微质过度激活与神经系统疾病有关,包括自闭症谱系障碍 (ASD).
- MEF2C是一个关键的免疫检查点,调节微质激活,但其精确的机制尚未完全理解.
研究的目的:
- 阐明MEF2C调节微质激活的机制.
- 在神经炎症条件下识别微质过度活化的潜在治疗点.
主要方法:
- 利用来自MEF2C缺乏 (MEF2C-/-) 和野生类型背景的人类多能干细胞衍生微状细胞 (iMGLs).
- 进行高通量选,以识别抑制微质过度活化的化合物.
- 研究了涉及MEF2C,p21,CDK2,RB和NFκB的分子途径.
- 在试验室和Mef2c缺乏的小鼠模型中评估了CDK2抑制剂 (BMS265246) 的疗效.
主要成果:
- 在脂多糖糖刺激时,MEF2C-/- iMGLs表现出过度活化.
- BMS265246,一种CDK2抑制剂,抑制了MEF2C-/- iMGL过度活化和正常化的炎症反应.
- MEF2C上调 p21,抑制 CDK2 介导的 RB 降解,防止 NFκB 核转位和微质过度激活.
- 在Mef2c缺乏的小鼠中,BMS265246治疗改善了微质过度活化和ASD类行为.
结论:
- MEF2C-p21-CDK2-RB-NFκB轴对于维持微质平衡至关重要.
- 抑制CDK2代表了神经炎症和相关的神经疾病的有前途的治疗策略.
相关概念视频
Master Transcription Regulators
6.8K
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...
6.8K
Calmodulin-dependent Signaling
5.0K
Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
5.0K
MAPK Signaling Cascades
5.0K
Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
5.0K
M-Cdk Drives Transition Into Mitosis
5.5K
Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
5.5K
Abnormal Proliferation
4.4K
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...
4.4K
Eukaryotic Transcription Inhibitors
9.7K
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
9.7K


