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相关概念视频

Mechanism of Ciliary Motion01:05

Mechanism of Ciliary Motion

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The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
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Cell Motility through Blebbing01:16

Cell Motility through Blebbing

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Blebs are a type of membrane protrusion formed by the internal hydrostatic pressure of the cytoplasm. Blebs are observed in several cell types, including fibroblasts, immune cells, and single-celled organisms like the amoeba. The primary function of blebs is cell locomotion and apoptosis, but they are also found during necrosis and cell division. The life cycle of a bleb comprises an initiation phase followed by the expansion and retraction phases.
Blebbing Through the Matrix
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Mechanism of Filopodia Formation01:39

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Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
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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...
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Microtubules in Signaling

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The primary cilium, made up of microtubules, acts as antennae on the cell surfaces for relaying external stimuli into the cells. These fine hair-like structures are present, generally one per cell. These are non-motile cilia in a 9+0 microtubules arrangement, where the central pair of microtubules are absent. The primary cilia arise from the basal body embedded in the cell membrane. Intraflagellar transport (IFT) carries requisite proteins from the cytoplasm to the cilium because the primary...
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Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
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相关实验视频

Updated: Jun 25, 2025

Author Spotlight: In-Depth Morphometric Examination and Quantification of Native Lens Structure Using Whole Mount Imaging
05:45

Author Spotlight: In-Depth Morphometric Examination and Quantification of Native Lens Structure Using Whole Mount Imaging

Published on: January 19, 2024

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纤毛尖的行为动力学调节光受体外段的完整性.

Roly Megaw1,2, Abigail Moye3, Zhixian Zhang3

  • 1MRC Human Genetics Unit, MRC Institute of Genetics & Cancer, University of Edinburgh, Western General Hospital, Edinburgh, EH4 2XU, UK. roly.megaw@ed.ac.uk.

Nature communications
|May 21, 2024
PubMed
概括
此摘要是机器生成的。

毛通过actin驱动的膜变化调节光受体外部,类似于ectocytosis. 这个过程中的缺陷,与RPGR突变相关,导致视网膜色素炎 (RP) 模型的视力丧失.

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Application of High-speed Super-resolution SPEED Microscopy in Live Primary Cilium
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相关实验视频

Last Updated: Jun 25, 2025

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Imaging Ca2+ Dynamics in Cone Photoreceptor Axon Terminals of the Mouse Retina
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Application of High-speed Super-resolution SPEED Microscopy in Live Primary Cilium
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Application of High-speed Super-resolution SPEED Microscopy in Live Primary Cilium

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科学领域:

  • 细胞生物学 细胞生物学
  • 眼科医生 眼科 眼科
  • 遗传学 是一个遗传学.

背景情况:

  • 毛细胞作为信号器官,通过细胞外来调节G蛋白合受体 (GPCR) 含量.
  • 光受体外部段,专门的眼,在每天脱落和再生的折叠圆盘内集中光敏感的GPCRs.
  • 外部片段盘周转缺陷与视网膜色素炎 (RP) 有关,视力损失的主要原因之一.

研究的目的:

  • 阐明光受体磁盘生成的机制及其与actin动态的关系.
  • 调查RPGR的作用,一个关键的基因在RP,在调节外部部门的营业额.
  • 探索潜在的治疗策略,针对RP中的actin介导途径.

主要方法:

  • 利用了在Rpgr基因中发生突变的小鼠模型.
  • 分析了光受体外段中的actin动力学和膜脱落过程.
  • 研究了actin操纵对光受体健康和视觉功能的影响.

主要成果:

  • 光受体磁盘的产生是由局部的活性动态驱动的,类似于ectocytosis.
  • 发现RPGR调节了对磁盘形成至关重要的动氨酸结合蛋白活性.
  • 在Rpgr小鼠模型中,乱的行为动态导致了异常的膜脱落,光受体死亡和视力丧失.

结论:

  • 作用因子介导的膜动力学对于光受体外段周转是必不可少的.
  • 这些动态的失调,特别是涉及RPGR,有助于视网膜色素炎的发病.
  • 准actin动态呈现了一个潜在的治疗途径,用于视力恢复在RP.