脂质滴是刚性的,并且在物理上抑制了细胞形成,除非细胞的压缩或拉伸激活了actomyosin
Michael P Tobin1,2, Irena L Ivanovska1, Steven H Phan1,3
1Molecular and Cell Biophysics Lab, University of Pennsylvania, Philadelphia, PA.
Molecular biology of the cell
|January 28, 2026
概括
巨细胞中的脂质滴 (LDs) 通过改变细胞骨架来破坏细胞功能,如细胞形成和迁移. 然而,机械压力可以激活actomyosin,拯救这些必要的细胞过程.
科学领域:
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
- 生物物理学的生物物理.
背景情况:
- 巨细胞利用 fagocytosis 清除病原体和细胞碎片.
- 脂质滴 (LD) 是细胞内脂质储存物,存在于各种细胞类型中,包括巨细胞.
- LDs对巨细胞和机动性的影响仍然不太清楚.
研究的目的:
- 为了研究脂质滴 (LDs) 对巨细胞和迁移的影响.
- 确定细胞骨和actomyosin在LD介导的细胞功能障碍中的作用.
- 探索LD载荷巨细胞中拯救细胞和运动的机制.
主要方法:
- 培养的巨细胞充满了脂质滴 (LDs).
- 显微镜技术可视化细胞骨和LDs.
- 检测目标的细胞分裂和细胞通过毛孔迁移.
- 将机械应力 (压缩/拉伸) 应用于负载的电池.
主要成果:
- LDs重组了巨细胞骨架,并损害了由actomyosin驱动的细胞形成.
- LDs取代了角性actomyosin,阻碍了最初的吞.
- 压缩或拉伸的压力激活了actomyosin,拯救了细胞化.
- LDs阻碍了巨细胞通过小孔的迁移.
- 当LDs被压入核中时,核破裂可能会发生.
结论:
- 脂质液滴破坏了巨细胞骨组织,细胞和迁移.
- 通过机械压力激活actomyosin可以恢复这些功能.
- 在特定条件下,LDs对核完整性构成威胁.
相关概念视频
00:41Phagocytosis
92.9K
Cells pull particles inward and engulf them in spherical vesicles in an energy-requiring process called endocytosis. Phagocytosis (“cellular eating”) is one of three major types of endocytosis. Cells use phagocytosis to take in large objects—such as other cells (or their debris), bacteria, and even viruses.
92.9K
00:41Phagocytosis
7.9K
Cells pull particles inward and engulf them in spherical vesicles in an energy-requiring process called endocytosis. Phagocytosis ("cellular eating") is one of three major types of endocytosis. Cells use phagocytosis to take in large objects, such as other cells (or their debris), bacteria, and even viruses.
The objective of phagocytosis is often destruction. Cells use phagocytosis to eliminate unwelcome visitors, like pathogens (e.g., viruses and bacteria). Many immune system cells,...
The objective of phagocytosis is often destruction. Cells use phagocytosis to eliminate unwelcome visitors, like pathogens (e.g., viruses and bacteria). Many immune system cells,...
7.9K
01:06Lipid Digestion
99.2K
Lipids are large molecules that are generally not water-soluble. Since most of the digestive enzymes in the human body are water-based, there are specific steps the body must take to break down lipids and make them available for use.
99.2K
01:17Phagocytosis of Apoptotic Cells
5.1K
Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or immature dendritic cells. Non-professional phagocytes such as epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes.
Normal cells contain receptors that prevent them from being recognized...
Normal cells contain receptors that prevent them from being recognized...
5.1K
01:38What are Lipids?
220.0K
Overview
220.0K
03:38Structure of Lipids
98.7K
Lipids include a diverse group of compounds that are largely nonpolar in nature. This is because they are hydrocarbons that include mostly nonpolar carbon-carbon or carbon-hydrogen bonds. Non-polar molecules are hydrophobic (“water fearing”), or insoluble in water. Lipids perform many different functions in a cell. Cells store energy for long-term use in the form of fats. Lipids also provide insulation from the environment for plants and animals. For example, they help keep aquatic...
98.7K