鳥のソマイトパターニングに関与する横軸信号:BMP4の役割
O Pourquié1, C M Fan, M Coltey
1Institut d'Embryologie du Centre National de la Recherche Scientifique et du Collège de France, Nogent sur Marne.
Cell
|February 9, 1996
まとめ
研究者らは,cSim1を横側ソミット発達のマーカーとして特定した. この研究では,神経管と横板メソデルマからの敵対的な信号が明らかにされ,骨形態遺伝タンパク質4 (BMP4) が横向化に不可欠である.
科学分野:
- 発達生物学 発達生物学とは
- 胚学 胚学について
- 分子生物学は分子生物学である.
背景:
- 脊椎動物の筋肉は,胚のソミットから生まれます.
- ソミット部 (中間部,横部) は,異なる筋肉群を特定しています.
- Dorsoventral somiteのパターンは理解されていますが,中側側側のパターンのメカニズムは不明です.
研究 の 目的:
- lateral somitic compartmentの仕様のための分子マーカーを特定する.
- 中側側ソミットパターンを制御するシグナル伝達経路を調査する.
- 系統の仕様における特定のシグナル伝達分子の役割を明らかにする.
主な方法:
- lateral somitic compartmentのための新しいマーカーとしてcSim1の識別.
- cSim1を使用して,細胞系統を追跡し,ソミットパターンを分析します.
- 周囲の組織からの信号分子の影響を調査する.
主要な成果:
- cSim1は,横側ソミティック区間とその派生体をマークします.
- 証拠は,敵対的な媒介化および横向化シグナルがソマイトをパターン化することを示唆しています.
- 骨形態遺伝タンパク質4 (BMP4) は,重要な横向化信号として関与しています.
結論:
- cSim1は lateral somitic lineageの仕様を研究するための貴重なマーカーです.
- 中側側ソミットパターンは,対極のシグナル信号のバランスを含む.
- BMP4は,ソミト性原始細胞の横向化を誘導する上で重要な役割を果たします.
さらに関連する動画
12:59Three and Four-Dimensional Visualization and Analysis Approaches to Study Vertebrate Axial Elongation and Segmentation
Published on: February 28, 2021
3.4K
06:49Analysis of Cell Differentiation, Morphogenesis, and Patterning During Chicken Embryogenesis Using the Soaked-Bead Assay
Published on: January 12, 2022
3.0K
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
Determination
16.3K
During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In...
16.3K
Notch Signaling Pathway
4.6K
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not...
4.6K
Hedgehog Signaling Pathway
7.1K
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
7.1K
Non-Canonical Wnt Signaling Pathways
6.4K
Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...
6.4K
Role Of Notch Signalling In Intestinal Stem Cell Renewal
1.8K
Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
1.8K
