PCPとセプティンは,皮質アクトミオシンを区画化し,集団細胞の移動を直接制御する
Asako Shindo1, John B Wallingford
1Howard Hughes Medical Institute and University of Texas at Austin, Austin, TX 78712, USA.
まとめ
平面細胞の極性タンパク質は,セプチン細胞骨格を制御することによって,脊椎動物胚の集団細胞運動を調節する. このメカニズムは細胞間の消化と胚の発達を駆動し,先天性欠陥の洞察を提供します.
科学分野:
- 発達生物学 発達生物学とは
- 細胞生物学 細胞生物学
- バイオフィジックス 生物物理学
背景:
- 個々の細胞の移動におけるアクトミオシンの役割は理解されているが,脊椎動物の胚内の集団細胞の移動におけるその機能は不明である.
- 収束的な伸縮運動は,初期の胚の再編成とオルガノゲネシスにとって極めて重要です.
研究 の 目的:
- アクトミオシンが脊椎動物の胚の発達中に集団細胞の動きを促すメカニズムを解明する.
- 平面細胞極性 (PCP) タンパク質とセプチン細胞骨格のコンバージェント拡張における役割を調査する.
主な方法:
- PCPタンパク質,セプチン細胞骨格,アクトミオシンダイナミクスの相互作用を研究した.
- 細胞間接触の縮小と細胞間関節の調整を分析した.
主要な成果:
- 平面細胞極性 (PCP) タンパク質はセプチン細胞骨格を利用して,収束拡張を制御する.
- PCPタンパク質は,皮質アクトミオシンがセプチン媒介で区画化することを直接導きます.
- この協調は,メゼンキマ細胞-細胞接触の短縮につながり,細胞のインターディジテーションを促します.
結論:
- この研究は,PCPタンパク質とセプチンがアクトミオシンをオーケストラ化して,胚の集合細胞移動を促す方法を明らかにしています.
- 発見は,発達シグナル伝達と細胞行動を結びつける基本的なメカニズムについての洞察を提供します.
- この研究は,スピナビフィーダや先天性腎臓キスタなどのヒトの先天性欠陥のエチオロジーに情報を与えるかもしれません.
関連する概念動画
Role of Septins
1.5K
Septins are the recently discovered fourth major protein component of the cytoskeleton, along with microfilaments, microtubules, and intermediate filaments. These proteins can associate with other cytoskeletal filaments and carry out varied roles or can be free-floating in the cytoplasm.
Cellular Functions of Septins
Recent studies have revealed the multifaceted roles of septins in various cellular processes such as cytokinesis, ciliogenesis, and neurogenesis. Septins act as scaffolds and...
Cellular Functions of Septins
Recent studies have revealed the multifaceted roles of septins in various cellular processes such as cytokinesis, ciliogenesis, and neurogenesis. Septins act as scaffolds and...
1.5K
The Role of Actin and Myosin in Non-muscle Cells
4.7K
Actin and myosin or actomyosin filaments also play a significant role in cells other than those involved in muscle contraction (which occurs within the sarcomere of muscle cells). The mechanism of non-muscle cell contractile bundles was first observed in Dictyostelium and Acanthamoeba. In non-muscle cells, two bundles are commonly found: stress fibers and actomyosin adherence belts. These contractile bundles are smaller and less organized than the ones found in muscle cells. They are held...
4.7K
Cell Motility through Blebbing
1.9K
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...
1.9K
Cytoskeletal Coordination in Cell Migration
4.9K
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...
4.9K
The Contractile Ring
6.1K
Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle.
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
6.1K
The Contractile Ring
2.7K
2.7K


