媒介激酶抑制抑制了唐氏综合征中过度活跃的干扰素信号传递
Kira A Cozzolino1, Lynn Sanford2,3, Samuel Hunter2,3
1Department of Biochemistry, University of Colorado, Boulder, United States.
eLife
|February 10, 2025
概括
抑制中介激酶CDK8/CDK19通过影响基因表达,新陈代谢和细胞因子,平息了唐氏综合征 (DS) 中的过度活跃的干扰素信号传递. 这一发现为DS和慢性炎症疾病提供了新的治疗策略.
科学领域:
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
- 遗传学 遗传学 是一个
背景情况:
- 过度活跃的干扰素 (IFN) 信号传递是唐氏综合征 (DS) 的一个关键特征,由三体 21 (T21) 引起.
- 与调解器相关的激酶CDK8和CDK19通过不太了解的机制参与炎症反应.
研究的目的:
- 在DS的背景下,研究介质酶CDK8和CDK19在过度活跃的IFN信号传递中的作用.
- 探索介质酶调节基因表达的新机制,包括转录,代谢和拼接途径.
主要方法:
- 利用具有和没有T21的兄弟匹配细胞系来研究介质激酶功能.
- 使用CDK8/CDK19抑制剂皮质素A (CA) 并分析基因表达,转录因子活性和拼接.
- 进行了细胞因子查和代谢学实验,以评估更广泛的细胞反应.
主要成果:
- 皮质素A治疗通过抑制转录因子活性和受影响的基因拼接来抑制IFN响应基因激活.
- 发现介质激酶通过对细胞因子基因和受体的转录调节来驱动IFN依赖的细胞因子反应.
- 抑制介质酶改变了代谢途径和高调的抗炎性脂质介质,激活核受体PPAR和LXR.
结论:
- CDK8/CDK19作为特定环境的代谢调节剂,通过转录因子,代谢和剪接控制基因表达.
- 媒介酶抑制通过转录,代谢和细胞因子通路对抗IFN信号传递.
- 这些发现对开发唐氏综合征和其他慢性炎症状况的治疗策略具有重要意义.
相关概念视频
Interactions Between Signaling Pathways
6.2K
Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
6.2K
The JAK-STAT Signaling Pathway
8.6K
Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...
8.6K
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
Receptor Downregulation in MVBs
2.0K
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...
2.0K
TGF - β Signaling Pathway
7.2K
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...
7.2K
Experimental RNAi
6.0K
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
6.0K


