相关实验视频
Updated: Jun 2, 2026

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Stimulation of Notch Signaling in Mouse Osteoclast Precursors
Published on: February 28, 2017
在骨髓性白血病中,诺奇通路的新瘤抑制功能
Apostolos Klinakis1, Camille Lobry, Omar Abdel-Wahab
1Biomedical Research Foundation, Academy of Athens, Athens, Greece.
Nature
|May 13, 2011
概括
痕信号通常调节细胞分化. 这项研究发现,诺奇信号中的失活突变会通过破坏血造干细胞分化,导致慢性骨髓单细胞白血病 (CMML).
科学领域:
- 血液学 血液学 血液学
- 分子生物学分子生物学
- 癌症生物学 癌症生物学
背景情况:
- 由γ-分泌酶 (γSE) 综合体调节的痕信号传递对于细胞分化至关重要.
- 虽然Notch信号在固体瘤中具有双重作用,但它主要在造血系统中起瘤作用,例如T细胞急性淋巴细胞白血病.
- 它在慢性骨髓单细胞白血病 (CMML) 中的作用尚不清楚.
研究的目的:
- 调查Notch信号在慢性骨髓单细胞白血病 (CMML) 中的作用.
- 为了识别影响CMML患者Notch通路的新突变.
- 阐明Notch通路在造血干细胞 (HSCs) 中失活的功能后果.
主要方法:
- 在CMML患者样本中进行体质突变分析.
- 在小鼠造血干细胞 (HSC) 中,诺奇信号的失活.
- 对造血原体种群和小鼠疾病诱导的分析.
- 转录组分析以确定受调的基因表达特征.
主要成果:
- 在CMML患者中,在Notch路径中发现了新的体内无活化突变.
- 在小鼠HSC中失活的Notch信号导致了粒细胞/单细胞前体 (GMP) 积累和CMML类疾病.
- 发现痕信号调节了髓单细胞特异性基因特征.
- 诺奇的目标Hes1直接抑制基因转录,调解诺奇的调节作用.
结论:
- 痕信号在早期的高状细胞分化中起着一种新的抑制作用.
- 诺奇信号的不激活有助于CMML的发病.
- 诺奇路径在同一组织内表现出取决于环境的瘤抑制和瘤促进功能.
相关概念视频
Notch Signaling Pathway
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
Notch Signaling Pathway
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
Role Of Notch Signalling In Intestinal Stem Cell Renewal
Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
Abnormal Proliferation
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 daughter...
Canonical Wnt Signaling Pathway
The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which results in tumor...
Loss of Tumor Suppressor Gene Functions
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
