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関連する概念動画

Cell-matrix's Response to Mechanical Forces01:13

Cell-matrix's Response to Mechanical Forces

2.7K
In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
Anchoring junctions mechanically attach a cell to the...
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Fibril-associated Collagen01:11

Fibril-associated Collagen

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Fibril-associated collagens are a type of collagens present in the extracellular matrix with interrupted triple helices or FACIT (Fibril-associated collagens interrupted triple-helices). FACIT help connect and attach the collagen fibrils with each other as well as with other proteins of the extracellular matrix.
For example, the type II collagen fibrils in cartilage have covalently bound type IX fibril-associated collagens at regular intervals. Other types of fibril-associated collagens are...
2.7K
The Bone Matrix01:18

The Bone Matrix

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Bone contains a relatively small number of cells entrenched in a matrix of collagen fibers that provide an adherent surface for inorganic salt crystals. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. Without collagen, bones would be brittle and shatter easily. Without mineral crystals, bones would flex and provide little support. This can be observed by an experiment: when the minerals of a bone are dissolved by soaking the bone in...
4.5K
Type IV Collagen of Basal Lamina01:05

Type IV Collagen of Basal Lamina

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Type IV collagen is a 400 nm long, network-forming collagen that acts as a barrier between the epithelial and endothelial cells. Type IV collagen  forms the backbone of the basement membrane by scaffolding with laminin, entactin, proteoglycans, and fibronectin. Apart from rendering structural support to the basement membrane, it also helps entail signaling potentials necessary for both pathological and physiological functions.
A type IV collagen molecule has six alpha chains which can...
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The Extracellular Matrix01:42

The Extracellular Matrix

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Overview
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Structural Protein Function01:56

Structural Protein Function

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Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity.  In bones and teeth, it mineralizes to...
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Updated: Sep 10, 2025

Microengineering 3D Collagen Hydrogels with Long-Range Fiber Alignment
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鉱物化されたコラーゲン界面における分子規模の相互作用は,ネットワークの浸透を防止し,コンプライアンスを維持します.

Amadeus C S de Alcântara1,2,3, Mario Milazzo4,5, Eesha Khare1,6

  • 1Laboratory for Atomistic and Molecular Mechanics (LAMM), Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.

ACS nano
|August 27, 2025
PubMed
まとめ

自然

キーワード:
原子モデル化コラーゲン繊維エンテシス機械的特性鉱物化したコラーゲン繊維分子動力学と骨のインターフェース

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Preparation of 3D Collagen Gels and Microchannels for the Study of 3D Interactions In Vivo
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Revealing the Cytoskeletal Organization of Invasive Cancer Cells in 3D
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Revealing the Cytoskeletal Organization of Invasive Cancer Cells in 3D

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関連する実験動画

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Preparation of 3D Collagen Gels and Microchannels for the Study of 3D Interactions In Vivo
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科学分野:

  • バイオマテリアル科学
  • 分子生物物理学
  • 組織工学

背景:

  • インターフェースは技術と工学において極めて重要であり,デバイスの効率と耐久性に影響を与えます.
  • 生物学的エンテシス (から骨への接点) は耐久性に対する重要な適合性を示しているが,分子メカニズムは不明である.
  • 鉱物で満たされた生物学的複合材料は しばしばエンテシスとは違って硬くなります

研究 の 目的:

  • エンテシスの適合の基礎となる分子機構を調査する.
  • ミネラル粒子がコラーゲン繊維と相互作用して 組織の適合性を維持する方法を理解する
  • バイオインスピレーション材料と外科的な修復における潜在的な応用を探求する.

主な方法:

  • 分子相互作用をモデル化するために完全な原子模擬を用いた.
  • ミネラル粒子とコラーゲン繊維の相互作用が 機械的性質に及ぼす影響を分析した.
  • 従来の複合材料理論と比較したシミュレーション結果.

主要な成果:

  • 鉱物粒子とコラーゲンの間の水素結合が 連続した鉱物ネットワークの形成を防ぐことが発見されました
  • 鉱物含有量の増加は従順性を維持し,典型的な複合物の行動に逆らった.
  • コラーゲン結合によって個々の鉱物群が分離され,全体的な硬化が防止される.

結論:

  • ミネラルとコラーゲンの間の分子相互作用は,エンテシス適合性を維持する鍵です.
  • このメカニズムは生物学的複合材料とポリマーマトリックス複合材料に関する新しい理解を提供します.
  • 発見は先進的なバイオインスピレーション材料の設計と 外科的な修復戦略の改善に役立つでしょう