平面的な細胞の極性シグナリングは,ゼブラフィッシュの胃化の際に細胞分裂の方向性を制御します
Ying Gong1, Chunhui Mo, Scott E Fraser
1Biological Imaging Center, Beckman Institute, California Institute of Technology, Pasadena, California 91125, USA.
Nature
|July 16, 2004
まとめ
ゼブラフィッシュの細胞は,非正規のWntシグナル伝達によって誘発される胃化の際に動物植物軸に沿って分裂する. この指向的な細胞分裂は,脊椎動物の軸の伸びにとって極めて重要です.
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
- 分子生物学は分子生物学である.
背景:
- オリエンテッド・セル・ディビジョンは,組織の発達と形成に不可欠です.
- 細胞分裂指向を調節するメカニズムは,特に脊椎動物ではほとんど理解されていません.
- 以前の研究では,主にCaenorhabditis elegansやDrosophila melanogasterのような無脊椎動物に焦点を当てていた.
研究 の 目的:
- 斑馬魚の胃増殖中にミトス分裂指向を調節するメカニズムを調査する.
- 細胞分裂極性の確立におけるWnt信号伝達の役割を決定する.
- 脊椎動物の軸の伸びに対する指向細胞分裂の貢献を調査する.
主な方法:
- ガストルーレーション中のゼブラフィッシュの胚のインビボコンフォカル画像撮影.
- 背中の組織におけるミトス分裂の分析.
- Wnt経路のコンポーネント (Silberblick/Wnt11,Dishevelled, Strabismus) を調査する.
主要な成果:
- 背部の組織にあるゼブラフィッシュの細胞は,動物-植物軸に沿って優先的に分裂する.
- Silberblick/Wnt11,Dishevelled,およびStrabismusを含むWnt経路は,この極性を確立するために不可欠です.
- 非正規のWntシグナル伝達は,ゼブラフィッシュの胃増殖中の指向細胞分裂に重要な役割を果たします.
結論:
- オリエンテッド・セル・ディビジョンは,ゼブラフィッシュの軸延長の主要な要因です.
- 非正規のWntシグナリングは,細胞分裂指向の調節に不可欠です.
- 非正規のWntシグナリングは,脊椎動物の軸延伸に保存された役割を果たし,細胞のインターカレーションと分裂の両方に影響を与える可能性が高い.
関連する概念動画
Gastrulation
52.8K
Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata...
52.8K
Cell Migration
16.6K
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.
16.6K
Determining the Plane of Cell Division
2.7K
Positioning the cell division plane is a critical step during development and cell differentiation, particularly during mitosis when the plane is essential for determining the size of the two daughter cells. The cell division plane is perpendicular to the plane of chromosome segregation, but different types of organisms have different cell division mechanisms to suit their morphology and function.
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division...
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division...
2.7K
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
Cell Polarization by Rho Proteins
3.2K
Cell polarity is the asymmetric distribution of cellular and membrane components, making one side of the cell different from the other. This polarity is essential to many processes such as embryogenesis, axon migration, glucose transport across epithelial cells, and directional cell migration. A migrating cell responds to intracellular or extracellular signals via molecular cascades that reorganize the actin cytoskeleton to establish this polarity. In these cells, the Rho family proteins Cdc42,...
3.2K


