相关实验视频
Updated: Feb 10, 2026

10:07
Measuring Motor Coordination in Mice
Published on: May 29, 2013
102.3K
LRRC55调节BK通道,以支持普尔金耶细胞的可塑性和运动协调
bioRxiv : the preprint server for biology
|February 9, 2026
概括
LRRC55是一种蛋白质,对小脑Purkinje细胞中BK通道功能至关重要. 它的缺失会通过破坏神经元刺激性和突触可塑性来损害运动控制,从而导致动力衰竭.
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
- 遗传学 是一个遗传学.
背景情况:
- 大导电性Ca2+-和电压激活的K+ (BK) 通道调节神经元刺激性.
- 特定于细胞类型的辅助子单元调节BK通道功能.
- LRRC55 (BK γ3) 是一个辅助子单元,其 in vivo 功能和分布在很大程度上是未知的.
研究的目的:
- 研究大脑中LRRC55的表达,分布和生理功能.
- 确定LRRC55在BK通道介导的神经元刺激性和大脑小脑Purkinje细胞中的突触可塑性中的作用.
- 为了阐明LRRC55对运动行为的贡献.
主要方法:
- 生成带有LRRC55标记的敲入小鼠来映射蛋白质表达.
- 创建了Lrrc55淘汰赛小鼠以评估体内功能.
- 在急性脑部切片中利用电生理学来检查普尔金尼细胞发射和突触可塑性.
- 通过步态,平衡和协调测试来评估运动行为.
主要成果:
- LRRC55蛋白在小脑Purkinje细胞中被选择性丰富.
- 由于Lrrc55的缺失,导致运动功能出现着类似于动力衰竭的障碍.
- 丢失LRRC55使Purkinje细胞对BK通道封锁不敏感,这表明LRRC55是BK通道调节发射所需的.
- LRRC55缺陷破坏了小脑突触可塑性,消除了长期的强化和长期的抑郁.
结论:
- LRRC55是一种Purkinje细胞丰富的辅助子单元,对BK通道功能至关重要.
- LRRC55对于调节小脑中BK依赖的神经元刺激性和突触可塑性至关重要.
- LRRC55在维持正常小脑运动功能方面发挥着至关重要的作用.
相关概念视频
Coordination Number and Geometry
19.1K
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
19.1K
Lattice Centering and Coordination Number
11.7K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
Types of Unit Cells
Imagine taking a large number of identical...
11.7K
Coordination Compounds and Nomenclature
26.9K
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
26.9K
Cytoskeletal Coordination in Cell Migration
5.6K
A migrating cell changes its shape during the cyclic events of attachment and detachment from the substratum and repositions the cell organelles correspondingly. These complex events are orchestrated by the dynamic cytoskeletal network comprising actin filaments, intermediate filaments, and microtubules. Cytoskeletal crosstalk — the direct and indirect communication between the different components — is crucial for this coordination. Direct communication involves various linker...
5.6K
Cells Coordinate Growth and Proliferation
5.1K
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,...
5.1K
Plasticity
3.1K
Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
3.1K

