相关实验视频
Updated: Jul 14, 2025

07:44
Evaluation of Synapse Density in Hippocampal Rodent Brain Slices
Published on: October 6, 2017
17.2K
通过TCF7L2传递星细胞β-catenin信号,调节突触发育和社会行为
Lukasz Mateusz Szewczyk1,2, Marcin Andrzej Lipiec3,4, Ewa Liszewska5
1Department of Psychiatry and Behavioral Sciences/Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA, USA. l.szewczyk@cent.uw.edu.pl.
Molecular psychiatry
|October 5, 2023
概括
TCF7L2,一个Wnt/β-catenin通路效应体,对于星球细胞成熟至关重要. 在星球细胞中缺少它会增加突触数量,并增强成年小鼠的社会行为,揭示了神经电路调节中的作用.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 发展生物学 发展生物学
背景情况:
- Wnt/β-catenin通路与神经发育障碍有关,但它在神经回路中的特定作用是复杂的.
- 在不同类型的大脑细胞中确定Wnt通路效应者的精确功能对于理解神经发育至关重要.
研究的目的:
- 调查TCF7L2的细胞自主作用,这是一个关键的Wnt/β-catenin效应因子,在天体细胞的发育和功能.
- 确定天体细胞中TCF7L2对神经电路形成和成人社会行为的影响.
主要方法:
- 利用条件淘汰赛小鼠模型,在产后天体细胞中专门删除Tcf7l2.
- 评估了天体细胞形态,成熟和细胞间通信 (间隙结合).
- 量化了突触密度和评估了成年人的社交互动行为.
主要成果:
- TCF7L2是小鼠和人类天体细胞中占主导地位的Wnt效应因子,在成熟期间达到峰值.
- 天体细胞中TCF7l2的条件淘汰导致细胞扩大,和间隙结合合受损.
- 在星球细胞中缺乏TCF7L2的小鼠表现出皮质刺激和抑制突触的增加和成年人社会互动的增强.
结论:
- 发育性Wnt/β-catenin信号传递,由天体细胞中的TCF7L2介导,限制激发性突触数量.
- 天体细胞TCF7L2通过突触调节在调节成年人的社会行为方面发挥着关键的细胞自主作用.
相关概念视频
Catenins
2.3K
Catenins are characterized by multiple binding domains and dynamic structures that allow them to function as linker proteins in cell junction complexes. All catenins, except α-catenin, contain a characteristic protein sequence called the armadillo repeat and are therefore also called armadillo proteins.
Catenins in Cell Junctions
Catenins bind to cell adhesion molecules such as cadherins and link them to different cytoskeletal proteins depending on the type of cell junction. At the...
Catenins in Cell Junctions
Catenins bind to cell adhesion molecules such as cadherins and link them to different cytoskeletal proteins depending on the type of cell junction. At the...
2.3K
Canonical Wnt Signaling Pathway
8.8K
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...
8.8K
Non-Canonical Wnt Signaling Pathways
7.3K
Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...
7.3K
Hedgehog Signaling Pathway
7.4K
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...
7.4K
Cadherins in Tissue Organization
3.0K
The cadherins are a superfamily of cell adhesion molecules comprising over 180 variants, with specific tissues expressing a particular combination of cadherin types. Cadherins generally exhibit homophilic binding; i.e., cadherins on one cell bind to cadherins of the same or closely related type on another cell. Thus, cells of the same type have a specific affinity to bind to each other and sort themselves into clusters to form tissues.
Cell Sorting During Development
Cell sorting plays an...
Cell Sorting During Development
Cell sorting plays an...
3.0K
TGF - β Signaling Pathway
7.4K
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...
7.4K

