ブラストダームがベテリン膜に付着すると,昆虫の胃化に影響する

Stefan Münster^1,2,3,4, Akanksha Jain¹, Alexander Mietke^1,2,3,5

¹Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany.

Nature

|March 29, 2019

まとめ

胚の組織が保護殻に付着することで発達を形作る力が生成されますこの研究では組織と殻の相互作用が昆虫の胃細胞の動きを導いており保存されたメカニズムを明らかにしています

科学分野:

発達生物学
細胞生物学
バイオ物理学

背景:

胎児の組織を複雑な体型に変形させる物理的な力です
組織内部の収縮性が胃を動かすことが知られているが,周囲の構造からの外的な力はあまり理解されていない.
胚はしばしば固い殻に包まれていて発達メカニズムにおける胚の役割について疑問を投げかけています

研究の目的:

胚の組織と周囲の殻の相互作用が胃化の過程で力を加えるかどうかを調べる.
組織と殻の結合と胚の発達に及ぼす影響の分子メカニズムを特定する.
このメカニズムが異なる昆虫種に共通するかどうかを調べるため

主な方法:

赤粉虫 (Tribolium castaneum) とフルーツフライ (Drosophila melanogaster) の胚を研究した.
αPS2インテグリン (膨らんだ) とαPS3インテグリン () のブラストダームの粘着における役割を調査した.
ゲノムノックダウンを利用し,胃細胞のフェノタイプを観察し,組織と殻の相互作用を分析した.

主要な成果:

トリボリウムカスタニアムのブラスト皮膚組織が協調した方法でヴィテリン包膜に付着することを発見した.
この粘着は,ガストルーレーション中に非対称な組織運動を生成する反作用力を発生させます.
αPS2インテグリンのノックダウンにより,この結合が破壊され,ガストルレーションの欠陥が生じました.

結論:

繊維膜への組織粘着は,胃の動きを形作る重要な対抗力を提供します.
特定のインテグリンに依存するこのメカニズムは,Tribolium castaneumやDrosophila melanogasterのような昆虫に保存されています.
組織粘着の空間時間的な制御は,胚の形態変異の重要な要因です.

さらに関連する動画

09:14

Author Spotlight: A Pipeline to Analyze Lineage-Specific Mutant Embryos at Single-Cell Resolution

Published on: June 14, 2024

1.7K

04:42

Imaging of Cell Shape Alteration and Cell Movement in Drosophila Gastrulation Using DE-cadherin Reporter Transgenic Flies

Published on: December 29, 2016

7.7K

関連する概念動画

01:56

Gastrulation

66.9K

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...

66.9K

01:47

Osmoregulation in Insects

17.5K

Malpighian tubules are specialized structures found in the digestive systems of many arthropods, including most insects, that handle excretion and osmoregulation. The tubules are typically arranged in pairs and have a convoluted structure that increases their surface area.

17.5K

01:20

Attachment

522

Attachment is vital for infant development, as warm social interactions support growth and well-being. In a classic 1958 study by Harry Harlow, the significance of warmth and comfort in forming attachments was examined. Harlow separated newborn monkeys from their mothers and provided two artificial "mothers": one made of cold wire and the other covered in soft cloth. Despite the wire mother offering food, the infant monkeys preferred the comfort of the cloth mother, demonstrating that...

522

01:18

Outer Layers of the Cell Envelope

1.0K

The outermost layers of prokaryotic cells play a critical role in their survival, virulence, and interaction with the environment. These layers, often composed of polysaccharides, polypeptides, or proteins, form protective and adhesive structures that vary in organization and function.Capsules and Slime LayersCapsules are highly organized, tightly bound layers that firmly attach to the bacterial cell wall. Capsules are usually made of polysaccharides, though some are made of polypeptides. These...

1.0K

01:24

Attachment Styles

430

Jeffrey Simpson's attachment theory suggests that early caregiver relationships shape lasting patterns of behavior and emotional regulation, known as attachment styles. These patterns are organized along two key dimensions: self-esteem and interpersonal trust. The intersection of these dimensions produces four primary attachment styles that typically persist throughout life and significantly influence how individuals form and maintain relationships.Secure Attachment StyleIndividuals with a...

430

02:57

Attachment of Sister Chromatids

4.0K

As cells progress into mitosis, the nuclear envelope breaks down, and the condensed chromosomes are exposed to the array of bipolar microtubules of the mitotic spindle. The kinetochore, a large, disc-shaped protein complex, is present at the centromere region of the sister chromatids and acts as a binding site for the microtubules. Usually, the plus-end of a single microtubule is embedded within the kinetochore. However, some kinetochores first establish lateral contact with the side-wall...