関連する実験動画
Updated: Jul 19, 2026

09:20
In situ Subcellular Fractionation of Adherent and Non-adherent Mammalian Cells
Published on: July 23, 2010
まとめ
ウサギの白血球からのカチオンのタンパク質分子は,白血球の粘着と移住を引き起こし,マイクロ循環の出血を引き起こします. この発見は,炎症反応と血管の浸透性を理解する上で重要である.
科学分野:
- 免疫学 免疫学とは
- 細胞生物学 細胞生物学
- 血管生物学 血管生物学
背景:
- ポリモルフォ核白血球 (PMNs) は,炎症および免疫反応において重要な役割を果たします.
- PMN内のライソソームには,細胞の行動と血管の完全性に影響を与える様々な生物活性タンパク質が含まれています.
研究 の 目的:
- ウサギのPMNライソソームからの特定のカチオンのタンパク質分子が微循環イベントに及ぼす影響を調査する.
- このタンパク質分子が白血球の結合,移住,出血を誘発できるかどうかを判断する.
主な方法:
- ウサギのPMNライソソームからカチオンタンパク質分子の分離.
- ネズミとウサギの内腔内視鏡で,微循環反応を観察する.
- タンパク質分子を投与して,白血球の行動と血管の完全性への影響を評価する.
主要な成果:
- カチオンのタンパク質分子は,ラットとウサギの腹腔内における白血球の有意な粘着と脱出を誘導した.
- 断片の投与は,観察可能なペテキアル出血を引き起こし,血管の透過性の増加を示しました.
- これらの効果はマイクロ循環で観察され,タンパク質の局所的な影響を強調しました.
結論:
- ウサギのPMNライソソームから分離されたカチオンのタンパク質は,炎症を誘発する性質を持っています.
- このタンパク質は白血球の徴集を直接仲介し,マイクロ血管の完全性を損なう可能性があります.
- この発見は,炎症プロセスと血管損傷におけるこのタンパク質分子の潜在的な役割を示唆しています.
関連する概念動画
Cell Migration
Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.
Lysosomes
Lysosomes are membrane-enclosed spherical sacs derived from the Golgi apparatus. The most important function of the lysosome is degrading macromolecules and biological polymers that are released during membrane trafficking events such as the secretory, endocytic, autophagic, and phagocytic pathways. The degradation is carried out by several hydrolytic enzymes active in an acidic environment of the lysosomal lumen. These acid hydrolases are involved in cellular processes such as cell signaling,...
Delivery Pathways to the Lysosome
Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
Cell Migration
Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.
Cytoskeletal Coordination in Cell Migration
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 proteins that...
Lysosomes
Lysosomes are membrane-enclosed spherical sacs derived from the Golgi apparatus. The most important function of the lysosome is degrading macromolecules and biological polymers that are released during membrane trafficking events such as the secretory, endocytic, autophagic, and phagocytic pathways. The degradation is carried out by several hydrolytic enzymes active in an acidic environment of the lysosomal lumen. These acid hydrolases are involved in cellular processes such as cell signaling,...

