関連する実験動画
Updated: Jun 20, 2026
07:30
Measuring Synaptic Vesicle Endocytosis in Cultured Hippocampal Neurons
Published on: September 4, 2017
シナプスベシクルに関連したCa2+チャネルは,エンドサイトーシスを促進し,エクソサイトーシスをエンドサイトーシスに結合します
Chi-Kuang Yao1, Yong Qi Lin, Cindy V Ly
1Howard Hughes Medical Institute, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA.
Cell
|September 10, 2009
まとめ
花は,新しいタンパク質で,シナプス内細胞化を調節するために,カルシウム流入を制御します. この発見は,持続的な神経伝達に不可欠なシナプス膀エクソサイトーシスとエンドサイトーシスを関連付けています.
科学分野:
- 神経科学は神経科学である.
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
背景:
- シナプス везикул (SV) のエクソサイトーシスとエンドサイトーシスは,神経伝達に極めて重要です.
- この2つのプロセスは,細胞内カルシウム (Ca2+) によって調節されます.
- 細胞外Ca2+はエンドサイトーシスに必要ですが,正確なメカニズムは不明です.
研究 の 目的:
- Ca2 + 調節されたシナプス内分泌細胞症に関与するタンパク質を特定し,特徴づけること.
- 新型トランスメブランタンパク質の役割,花,シナプス機能の解明.
主な方法:
- タンパク質の識別と特徴付け.
- 花のタンパク質の局所化研究.
- 細胞内Ca2+レベルを分析する.
- フラワー欠乏モデルにおけるシナプスエンドサイトーシスの評価.
主要な成果:
- 新しいSV関連型トランスメブランタンパク質,Flowerが特定されました.
- 花は,SV融合後,ペリアクティブゾーンに局所する.
- 花の喪失は,細胞内Ca2+ホメオスタシスとシナプス内細胞分裂を損なう.
- 花は多元化し,Ca2+チャネルとして機能する.
結論:
- 花はCa2+チャネルとして作用し,シナプス内細胞化を調節する.
- このメカニズムは,SVエクソサイトーシスをエンドサイトーシスと結合させ,持続的な神経伝達を確保します.
関連する概念動画
01:26Fusion of Secretory Vesicles with the Plasma Membrane
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...
00:50Exocytosis
Exocytosis is a process that releases molecules outside the cell. Like other bulk transport mechanisms, exocytosis requires energy.
Exocytosis is the opposite of endocytosis, which brings molecules inside the cell. Sometimes, the released materials are signaling molecules. For example, neurons typically use exocytosis to release neurotransmitters. Cells also use exocytosis to insert proteins such as ion channels into their cell membranes, secrete proteins for use in the extracellular matrix, or...
Exocytosis is the opposite of endocytosis, which brings molecules inside the cell. Sometimes, the released materials are signaling molecules. For example, neurons typically use exocytosis to release neurotransmitters. Cells also use exocytosis to insert proteins such as ion channels into their cell membranes, secrete proteins for use in the extracellular matrix, or...
00:51Exocytosis
Exocytosis is used to release material from cells. Like other bulk transport mechanisms, exocytosis requires energy.
01:45Vesicular Tubular Clusters
After budding out from the ER membrane, some COPII vesicles lose their coat and fuse with one another to form larger vesicles and interconnected tubules called vesicular tubular clusters or VTCs. These clusters constitute a compartment at the ER-Golgi interface known as ERGIC (Endoplasmic Reticulum Golgi Intermediate Compartment). The ERGIC is a mobile membrane-bound cargo transport system that sorts proteins secreted from ER and delivers them to the Golgi.
With the help of motor proteins such...
With the help of motor proteins such...
01:18Vesicular Trasport: Endocytosis, Transcytosis and Exocytosis
Vesicular transport is a cellular process that encompasses the engulfment of particles or dissolved substances by cells. It involves endocytosis, transcytosis, and exocytosis.
Endocytosis is a cellular mechanism that involves the inward folding of the cell membrane to create vesicles that capture and transport large drug molecules. This process comprises two distinct methods: pinocytosis (often referred to as "cell drinking") and phagocytosis (often referred to as "cell eating"). Pinocytosis is...
Endocytosis is a cellular mechanism that involves the inward folding of the cell membrane to create vesicles that capture and transport large drug molecules. This process comprises two distinct methods: pinocytosis (often referred to as "cell drinking") and phagocytosis (often referred to as "cell eating"). Pinocytosis is...
01:33Overview of Secretory Vesicles
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...