对于颗粒细胞神经元前体的发展和Sonic Hedgehog Medulloblastoma生长,需要SMARCA5
Foteini Tsiami1,2, Layla Drwesh3, Surender Surender1,2
1Department of Neurology and Interdisciplinary Neuro-Oncology, Hertie Institute for Clinical Brain Research, University Hospital Tübingen, Eberhard Karls University Tübingen, 72076, Tübingen, Germany.
Scientific reports
|July 18, 2025
概括
研究人员确定SMARCA5是Sonic hedgehog medulloblastoma (SHH-MB) 中的一个关键遗传依赖. 向SMARCA5可以抑制瘤生长,并改善小鼠模型的存活率,突出其在小脑发育和SHH-MB病变发生中的作用.
科学领域:
- 神经瘤学神经瘤学
- 发展生物学 发展生物学
- 遗传学 遗传学 是一个
背景情况:
- 脑髓母细胞瘤是一种多样化的恶性胚胎脑瘤.
- 声波刺髓母细胞瘤 (SHH-MB) 的特征是SHH通路的激活.
- 由于缺乏细胞模型,对SHH-MB在SHH通路之外的遗传依赖存在有限的知识.
研究的目的:
- 使用CRISPR-Cas9脱落屏幕识别SHH-MB中的遗传漏洞.
- 调查已识别的遗传依赖在SHH-MB病原和小脑发育中的作用.
主要方法:
- 在SMB21 SHH-MB细胞中使用CRISPR-Cas9脱落屏幕.
- 通过基因淘汰和废除研究验证遗传依赖.
- 在小鼠模型中进行的SHH-MB和小脑发育的体内实验.
主要成果:
- 一种依赖ATP的染色体重塑剂SMARCA5,成为SHH-MB的一个关键遗传依赖.
- SMARCA5淘汰抑制了SHH通路激活和SHH-MB细胞增殖.
- 在小脑颗粒细胞前体 (GCNPs) 中条件删除SMARCA5导致小脑低成形并减少了GCNP的增殖.
- 在SHH-MB小鼠模型中失去SMARCA5延长了瘤携带小鼠的存活时间.
结论:
- 在小脑发育和SHH-MB病变发生过程中,SMARCA5起着至关重要的作用.
- 准SMARCA5代表了SHH-MB的潜在治疗策略.
相关概念视频
Hedgehog Signaling Pathway
7.5K
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
7.5K
Role Of Notch Signalling In Intestinal Stem Cell Renewal
2.2K
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...
2.2K
Cells Coordinate Growth and Proliferation
4.6K
Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
4.6K
Zygotic Development And Stem Cell Formation
5.5K
The development of all multicellular organisms starts with the fusion of haploid cells called sperm and egg to form a diploid zygote. A zygote is a totipotent cell that can develop into a complete organism. The zygote undergoes cell division or cleavage to form an 8-cell mass. Until this stage, the cells are spherical, loosely attached, and remain totipotent. Totipotent cells are capable of developing both the embryonic and the extraembryonic tissues. However, as they continue to divide, they...
5.5K
Abnormal Proliferation
4.6K
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...
4.6K
Notch Signaling Pathway
4.4K
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...
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...
4.4K


