人間の早期脳のオルガノイド発達の形態動力学
Akanksha Jain1, Gilles Gut2, Fátima Sanchis-Calleja2
1Department of Biosystems Science and Engineering, ETH Zürich, Basel, Switzerland. akanksha.jain@bsse.ethz.ch.
Nature
|June 18, 2025
まとめ
研究者は人間の脳内臓の 発達を観察するために 進化した生体顕微鏡を開発しました 細胞外マトリックスが 脳の領域形成と組織組織を 機械感知で導くことを発見しました
科学分野:
- 発達生物学
- 神経科学
- 幹細胞生物学
背景:
- 脳オーガノイドは人間の脳の発達と自己組織を研究するためのモデルを提供します.
- 現在の方法は,オルガノイド内のダイナミックな細胞過程の長期観察を制限しています.
研究 の 目的:
- 人間の脳のオーガノイドの発達を数週間にわたって追跡するための生体顕微鏡技術を確立する.
- 細胞外マトリックスとメカノセンシングの脳地域化と形態変異における役割を調査する.
主な方法:
- 光で標識された人間の脳オーガノイドの長時間生きた光シート顕微鏡
- 新しい2チャネル,マルチモザイク,マルチタンパク質のラベリング戦略を 計算式デマルチプレキシングで
- 細胞下ダイナミクス (アクチン,チューブリン,膜,核) と細胞形態測定の同時定量化
主要な成果:
- 重要な発達移行 (神経皮質誘導,発光,地域化) 中の組織形態と細胞行動の詳細な追跡.
- 球膜の膨張と細胞構成は細胞外マトリックス経路の調節体と機械感知遺伝子発現と相関する.
- 外的マトリックスは,光膜の膨張とテレンセファロンの形成を促進し,その欠如は形態の変化とニューラル・クライストのアイデンティティの増大につながります.
- マトリックス誘発の地域誘導とルメン形態化は,WNTとHippo (YAP1) のシグナル伝達経路と関連しています.
結論:
- 細胞外マトリックスと機械感知は 人間の脳の地域化と形態変異を導く上で 重要な役割を果たします
- この研究は,脳形態動力学を in vitro で研究するための新しいツールを提供します.
- WNTとHippo (YAP1) のシグナル伝達経路は,マトリックス誘発発達パターンの主要な媒介である.
関連する概念動画
01:30Neurulation
40.2K
Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the...
40.2K
01:29Bone Formation by Intramembranous Ossification
16.1K
Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into ...
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into ...
16.1K
01:09Changes in the Appendicular Skeleton with Age
3.2K
The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
3.2K
01:30Three-Dimensional Force System:Problem Solving
1.5K
A three-dimensional force system refers to a scenario in which three forces act simultaneously in three different directions. This type of problem is commonly encountered in physics and engineering, where it is necessary to calculate the resultant force on the system, which can then be used to predict or analyze the behavior of the object or structure under consideration.
To solve a three-dimensional force system, first resolve each force into its respective scalar components. Do this using...
To solve a three-dimensional force system, first resolve each force into its respective scalar components. Do this using...
1.5K
01:30Machines: Problem Solving II
791
Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. Consider a lifting tong carrying a 100 kg load. It comprises movable sections DAF and CBG linked together with member AB.
791
01:12General Case of Eccentric Axial Loading
691
Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from symmetrical bending, which are essential for designing structures to withstand different loading conditions.
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
691