相关实验视频
Updated: May 22, 2025

07:24
A Protocol for the Production of KLRG1 Tetramer
Published on: January 12, 2010
9.9K
Erk1R84H是一种型蛋白质,在小鼠中引起肝细胞癌,并强加严格的负反循环
Nadine Soudah1, Alexey Baskin1, Merav Darash-Yahana1
1Department of Biological Chemistry, Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel.
Oncogene
|May 20, 2025
概括
改造的Erk1蛋白可以在小鼠中引起肝癌,这表明它可能是这种途径的主要驱动因素.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 信号传输 信号传输
背景情况:
- 受体氨酸激酶 (RTK) -Ras-Raf-MEK-Erk通路在各种癌症中经常发生变化.
- 埃尔克在调解致癌性方面的确切作用和所需的活性水平尚不清楚.
研究的目的:
- 调查Erk是否是RTK-Ras-Raf-MEK-Erk通路瘤潜在的唯一调解者.
- 为了确定癌原性所必需的Erk活性程度.
主要方法:
- 在小鼠肝脏中诱导了内在活跃的Erk1变体 (Erk1R84H) 的表达.
- 在肝细胞癌 (HCC) 发育期间分析Erk1R84H酸化水平.
- 对Erk1R84H转化NIH3T3细胞的检查.
主要成果:
- 在小鼠肝脏中诱导的Erk1R84H表达导致肝细胞癌 (HCC).
- 在HCC进展过程中,活性酸化Erk1R84H水平显著下降,在成熟的瘤中无法检测到.
- 化Erk1R84H在Erk1R84H转换的NIH3T3细胞中也无法检测到.
结论:
- Erk1可以独立诱导HCC,这表明它是其通路中的主要或唯一的致癌媒介.
- 由Erk1R84H驱动的瘤维护只需要最小的Erk活动.
- Erk1R84H突变可能是人类癌症恶性瘤的驱动因素.
相关概念视频
Regulation of the Unfolded Protein Response
2.4K
Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
2.4K
Non-LTR Retrotransposons
11.3K
As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...
11.3K
Enzyme-linked Receptors
76.8K
Enzyme-linked receptors are proteins that act as both receptor and enzyme, activating multiple intracellular signals. This is a large group of receptors that include the receptor tyrosine kinase (RTK) family. Many growth factors and hormones bind to and activate the RTKs.
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
76.8K
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

