関連する実験動画
Updated: Mar 7, 2026

07:42
Live Cell Imaging during Mechanical Stretch
Published on: August 19, 2015
11.1K
機械的なストレッチは,Piezo1を通じた急速な上皮細胞分裂を誘発する
S A Gudipaty1, J Lindblom1, P D Loftus1
1Huntsman Cancer Institute, University of Utah, 2000 Circle of Hope, Salt Lake City, Utah 84102, USA.
Nature
|February 16, 2017
まとめ
機械的な力が表皮細胞の数を調節する ピエゾ1チャネルは細胞分裂を促すため 伸縮を感知し 細胞挤出を誘発し 組織ホメオスタシスを維持します
科学分野:
- 細胞生物学
- バイオ物理学
- 組織ホメオスタシス
背景:
- 皮質細胞は 重要なバリアを形成しますが 転生率が高くなります
- 細胞分裂と死亡のバランスをとる必要があります.
- 細胞分裂を制御するメカニズムは不明です
研究 の 目的:
- 表面細胞の分裂と死を制御する力について調べる
- 皮質ホメオスタシスにおけるPiezo1チャネルの役割を明らかにする.
- 異なるメカニカルシグナルが 異なる細胞結果につながることを理解する
主な方法:
- 哺乳類の表皮の実験的な機械的伸縮
- 細胞分裂と流出率の分析
- ピエゾ1チャネルの局所化と活性化の調査
- 細胞サイクル進行マーカー (例えば,サイクリンB) とシグナル伝達経路 (例えば,ERK1/2リン酸化) の評価.
主要な成果:
- 機械的なストレッチは,ピエゾ1の活性化によって上皮細胞の分裂を迅速に刺激する.
- ストレッチは,カルシウム依存のERK1/ 2リン酸化とサイクリンB転写を活性化することによって,G2相細胞の分裂を誘発する.
- 細胞の混雑は細胞の流出を誘導し,またPiezo1を必要とします.
- ピエゾ1の局所化は異なる:分裂する細胞におけるプラズマ膜/サイトプラズマ,排出する細胞におけるサイトプラズマ集積.
結論:
- Piezo1によって感知される機械的な力は,上皮細胞数の重要な調節因子です.
- ストレッチは細胞分裂を促し,混雑は細胞挤出を誘導し,組織ホメオスタシスを維持します.
- 異なるピエゾ1の局所化と活性化により,機械的なシグナルに対する異なる細胞反応が決定されます.
関連する概念動画
Cell-matrix's Response to Mechanical Forces
3.7K
In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue.
Anchoring junctions mechanically attach a cell to the...
Anchoring junctions mechanically attach a cell to the...
3.7K
Mechanically-gated Ion Channels
8.0K
Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
8.0K
Tension Response at Adherens Junctions
3.8K
The adherens junctions that anchor cells together are multi-protein complexes that dynamically adapt to mechanical stimuli such as tensile forces and shear stress. Mechanosensory proteins in these junctions can sense such mechanical stimuli and undergo a shift in their conformation, resulting in an altered function — a process called mechanotransduction.
α-Catenin as a Mechanosensory Protein
The α-catenin of adherens junctions is an allosteric protein with three VH (vinculin...
α-Catenin as a Mechanosensory Protein
The α-catenin of adherens junctions is an allosteric protein with three VH (vinculin...
3.8K
Cell Motility through Blebbing
2.6K
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
In multicellular...
Blebbing Through the Matrix
In multicellular...
2.6K
Mitogens and the Cell Cycle
8.2K
Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...
8.2K
Overview of Cell-Matrix Interactions
9.5K
The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
9.5K

