RNF220调解了STAT3的K63相关的多基化,并加剧了病理性心脏缩
Yan Gao1,2,3, Zhuo Zhao3, Xuepin Chen1,2
1Department of Cardiology, Qingdao University, Qingdao, 266071, China.
Cell death and differentiation
|November 11, 2025
概括
环指蛋白220 (RNF220) 通过稳定STAT3蛋白来调节病态心脏缩. 缺少RNF220可以防止心脏膨胀,而过度表达会恶化心脏功能障碍,从而成为心脏衰竭的治疗点.
科学领域:
- 心血管生物学 心血管生物学
- 疾病的分子机制.
- 乌比奎丁-蛋白质酶体系统
背景情况:
- 病态心脏缩是心力衰竭的主要危险因素.
- 心脏缩的分子基础尚未完全理解.
- 在心脏缩期间,无素-蛋白酶体系统 (UPS) 在蛋白质调节中起着至关重要的作用.
研究的目的:
- 为了研究E3泛素酶环指蛋白220 (RNF220) 在病理性心脏缩中的作用.
- 阐明RNF220影响心脏缩的分子机制.
- 确定RNF220作为心力衰竭的潜在治疗点.
主要方法:
- 使用了血管激素II (Ang II) 诱导的心脏缩的小鼠模型.
- 使用RNF220淘汰和过度表达的小鼠线.
- 进行了蛋白质分子质谱和共免疫沉 (Co-IP) 试验.
- 使用STAT3抑制剂和基因沉默进行了救援实验.
主要成果:
- 缺乏RNF220使得抗 Ang II 诱导的心脏缩和纤维化.
- 过度表达RNF220会加剧心脏功能障碍和高性反应.
- 确定了RNF220和STAT3之间的直接相互作用,其中RNF220促进了STAT3 K63相关的多比基因化和稳定.
- STAT3的抑制或沉默逆转了RNF220过度表达引起的心脏缩.
结论:
- RNF220通过特定的多比基因化稳定STAT3,从而驱动病态心脏缩.
- RNF220代表了一种新的治疗点,用于干预心力衰竭的进展.
- 这项研究揭示了在心脏缩中通过UPS介导的新调节途径.
更多相关视频
08:00Enhancing the Engraftment of Human Induced Pluripotent Stem Cell-derived Cardiomyocytes via a Transient Inhibition of Rho Kinase Activity
Published on: July 10, 2019
6.5K
11:19Merging Absolute and Relative Quantitative PCR Data to Quantify STAT3 Splice Variant Transcripts
Published on: October 9, 2016
15.4K
相关概念视频
NF-κB-dependent Signaling Pathway
9.7K
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...
9.7K
The JAK-STAT Signaling Pathway
11.9K
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...
11.9K
PI3K/mTOR/AKT Signaling Pathway
5.3K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
5.3K
MAPK Signaling Cascades
7.8K
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...
7.8K
Abnormal Proliferation
5.1K
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...
5.1K
mTOR Signaling and Cancer Progression
4.6K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
4.6K
