相关实验视频
Updated: Jan 30, 2026

06:31
Force and Position Control in Humans - The Role of Augmented Feedback
Published on: June 19, 2016
8.2K
针对FOSL1/IKKα正反循环,通过抑制NF-κB信号,减轻质母细胞瘤的恶性病变
Beichen Zhang1,2, Hao Tian2, Haoyu Zhou1,2
1Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China.
Theranostics
|January 29, 2026
概括
质母细胞瘤 (GBM) 的进展是由与IKKα和UCHL3的FOS样抗原1 (FOSL1) 反循环驱动的,激活NF-κB信号. 用siRNA纳米颗粒准这一轴为GBM提供了一个有前途的治疗策略.
科学领域:
- 神经瘤学神经瘤学
- 分子生物学分子生物学
- 癌症遗传学 癌症遗传学
背景情况:
- 质母细胞瘤 (GBM) 是一种高度侵略性的脑瘤,由于其分子异质性和治疗耐药性,治疗选择有限.
- 迫切需要新的治疗目标来克服治疗GBM的挑战.
研究的目的:
- 确定GBM进展的关键分子驱动因素.
- 阐明GBM病原体的潜在机制.
- 开发和评估针对GBM的有针对性的治疗策略.
主要方法:
- 从TCGA和CGGA数据集中分析基因表达特征,以确定预后转录因子.
- 使用细胞系模型与lentiviral介导的基因操纵进行功能验证.
- 通过ChIP,co-IP,ubiquitination和激酶试验来研究分子机制.
- 开发和评估基于纳米囊的siRNA输送系统,用于穿透血脑屏障.
- 在 ортотоп GBM 模型中评估治疗疗效.
主要成果:
- FOS样抗原1 (FOSL1) 被确定为GBM的关键瘤原体驱动因素.
- 在FOSL1和核因子卡帕-B激酶亚单元α (IKKα) 抑制剂之间形成了积极的反循环,涉及UCHL3介导的FOSL1脱和稳定.
- 这种反循环激活NF-κB信号,促进GBM入侵和恶性瘤.
- 一个基于纳米粒子的siRNA传递系统针对FOSL1 (plofsome@siFOSL1),在临床前模型中有效抑制了FOSL1表达和减弱了GBM恶性表型.
结论:
- 一个新的FOSL1/IKKα/UCHL3正反循环是通过NF-κB激活的GBM病原体的关键驱动力.
- 这种反循环代表了对GBM治疗的有希望的治疗目标.
- 针对FOSL1的纳米颗粒介导siRNA传递显示出作为GBM新治疗策略的潜力.
相关概念视频
Positive and Negative Feedback Loops
25.1K
Animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis ("steady state"). Examples of these changes include regulation of the level of glucose or calcium in the blood or internal responses to external temperatures. Homeostasis requires maintaining an internal dynamic equilibrium:
25.1K
Cell Signaling Feedback Loops
7.3K
Positive and negative feedback loops are crucial for regulating biological signaling systems. These feedback loops are processes that connect output signals to their inputs.
Negative feedback loops
Most signaling systems have negative feedback loops that can perform different functions such as output limiter, and adaptation.
Output limiter
Upon receiving an input signal, the cellular response rapidly increases until a threshold is reached. Beyond this threshold, a negative feedback loop...
Negative feedback loops
Most signaling systems have negative feedback loops that can perform different functions such as output limiter, and adaptation.
Output limiter
Upon receiving an input signal, the cellular response rapidly increases until a threshold is reached. Beyond this threshold, a negative feedback loop...
7.3K
Feedback Loops
64.3K
In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.
64.3K
NF-κB-dependent Signaling Pathway
10.0K
The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The...
NF-κB-dependent Signaling Mechanism
The...
10.0K
Root Loci for Positive-Feedback Systems
347
The Hartley oscillator is a positive feedback system that sustains oscillations by feeding the output back to the input in phase, thereby reinforcing the signal. Positive feedback systems can be viewed as negative feedback systems with inverted feedback signals. In these systems, the root locus encompasses all points on the s-plane where the angle of the system transfer function equals 360 degrees.
The construction rules for the root locus in positive feedback systems are similar to those in...
The construction rules for the root locus in positive feedback systems are similar to those in...
347
Feedback Inhibition
57.1K
Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
57.1K

