细胞外囊泡的多佩依赖调节维持神经元形态
Seungmee Park1, Nathaniel Noblett2, Lauren Pitts3
1Department of Neurobiology, School of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA.
Current biology : CB
|October 8, 2024
概括
保持成熟的神经元形状至关重要. 一项新的研究显示,DIP-2,SAX-2,PAD-1和TAT-5形成了一个调节神经元形态和细胞外囊泡释放的网络.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
背景情况:
- 成熟的神经元需要机制来维持其结构在整个成年生活.
- 人们对控制维持神经元形态的分子通路知之甚少.
- 在C. elegans dip-2中功能丧失导致成年神经元中神经元过度生长.
研究的目的:
- 研究维持成熟神经元形态的机制.
- 识别神经元结构中涉及的遗传相互作用和新型调节剂.
- 探索细胞外囊泡 (EV) 释放在神经元维护中的作用.
主要方法:
- 在C. elegans中进行遗传选,以确定神经元缺陷的抑制剂.
- 通过功能丧失和功能增益突变分析基因功能.
- 通过细胞特异性淘汰和膜关联研究来研究蛋白质局部化和功能.
主要成果:
- dip-2突变体显示与sax-2的遗传相互作用,并结合损失破坏神经元形态,并提高EV释放.
- 在PAD-1和TAT-5中获得功能的突变抑制了dip-2/sax-2缺陷,恢复神经元形态和正常的EV水平.
- PAD-1功能增益在神经元中以细胞自主作用,增加血关联并抑制EV释放.
结论:
- 一个涉及DIP-2,SAX-2,PAD-1和TAT-5的新功能网络维持神经元形态.
- 这个网络在调节神经元细胞外囊泡释放方面发挥着至关重要的作用.
- 了解这些机制可以了解神经元的稳定性和潜在的治疗点.
相关概念视频
Overview of Secretory Vesicles
8.5K
Secretory vesicles, also known as dense core vesicles (DCVs), are membrane-bound vesicles that transport secretory proteins, such as hormones or neurotransmitters. Regulated secretory vesicles transport proteins from the trans-Golgi network to the exterior of the cell. Proteins present in regulated secretory vesicles are required to be rapidly exocytosed in large amounts upon a specific stimulus.
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
8.5K
Neural Regulation
39.1K
Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
39.1K
Receptor Downregulation in MVBs
2.0K
Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
2.0K
Regulation of Nuclear Protein Sorting
2.4K
Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
2.4K
Fusion of Secretory Vesicles with the Plasma Membrane
11.0K
Proteins and neurotransmitters in secretory vesicles can be released from a cell upon vesicle docking, priming, and fusion with the plasma membrane. Vesicles are docked and primed in preparation for the quick exocytosis of their contents in response to a stimulus. The fusion process is mainly carried out by a SNAP Receptor or SNARE complex, consisting of synaptobrevin, syntaxin-1, and SNAP-25.
In 1993, Jim Rothman proposed that the antiparallel pairing of vesicular and transmembrane SNAREs, or...
In 1993, Jim Rothman proposed that the antiparallel pairing of vesicular and transmembrane SNAREs, or...
11.0K
Assembly of Complex Microtubule Structures
1.8K
Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
1.8K


