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関連する概念動画

Cell Motility through Blebbing01:16

Cell Motility through Blebbing

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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
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Mechanism of Filopodia Formation01:39

Mechanism of Filopodia Formation

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Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
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Fascicle Arrangement in Skeletal Muscles01:25

Fascicle Arrangement in Skeletal Muscles

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Fascicles are bundles of muscle fibers in a skeletal muscle. Muscle fascicle arrangement is directly associated with the power and range of motion of various muscles. The configuration of these fascicles can vary, leading to different functional outcomes.
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Actin Polymerization and Cell Motility01:13

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Actin is a family of globular proteins that are highly abundant in eukaryotic cells. It makes up approximately 1-5% of total cell protein concentration. Actin monomers polymerize to form a complex network of polarized filaments, the actin cytoskeleton, that plays a crucial role in many cellular processes, including cell motility, division, endocytosis, and metastasis of cancer cells.
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Smooth muscle tissue is a type of muscle tissue that can be found lining various vital organs in the human body, including the lungs, blood vessels, digestive tract, and respiratory tract. This type of tissue is responsible for regulating the movements of these organs, playing crucial roles in the functioning of various systems, including the vascular, digestive, respiratory, and urinary systems.
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Actin and myosin or actomyosin filaments also play a significant role in cells other than those involved in muscle contraction (which occurs within the sarcomere of muscle cells). The mechanism of non-muscle cell contractile bundles was first observed in Dictyostelium and Acanthamoeba. In non-muscle cells, two bundles are commonly found: stress fibers and actomyosin adherence belts. These contractile bundles are smaller and less organized than the ones found in muscle cells. They  are held...
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Updated: Sep 9, 2025

Flexural Rigidity Measurements of Biopolymers Using Gliding Assays
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"フレキシクル"の集団的行動

Philipp W A Schönhöfer1, Sharon C Glotzer1,2

  • 1Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109.

Proceedings of the National Academy of Sciences of the United States of America
|September 4, 2025
PubMed
まとめ
この要約は機械生成です。

柔軟性と呼ばれる 合成活性微粒子は 生物学的細胞を模倣します 衝突時の形状の変化は 集団的な動きを促し 反応性の高いマイクロロボットの 設計に道を開きます

キーワード:
活性物質コロイド分子動力学運動性による相分離群集する

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Traction Microscopy Integrated with Microfluidics for Chemotactic Collective Migration
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Author Spotlight: Collective Behavioral Analysis of the Nematode, Caenorhabditis elegans
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Author Spotlight: Collective Behavioral Analysis of the Nematode, Caenorhabditis elegans

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関連する実験動画

Last Updated: Sep 9, 2025

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Traction Microscopy Integrated with Microfluidics for Chemotactic Collective Migration
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Author Spotlight: Collective Behavioral Analysis of the Nematode, Caenorhabditis elegans
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科学分野:

  • 柔らかい物質の物理
  • 活性物質システム
  • コロイド科学

背景:

  • 合成活性微粒子は 生物学的対称性を模倣しています
  • マイクロスケールシステムにおける自律的な振る舞いを理解することは依然として課題です
  • 合成物質と生物学的活性物質の間のギャップを埋めることは極めて重要です.

研究 の 目的:

  • "フレキシクル"と呼ばれる 変形可能な細胞の複合粒子を モデル化し調査する.
  • シミュレーションを使用して,密度の高いフレキシクルシステムの集団的行動を探求する.
  • 粒子の変形性が活性物質のダイナミクスをどのように影響するのかを理解する.

主な方法:

  • 3D変形性細胞複合粒子モデル (flexicle) の開発
  • 柔軟な水泡の中に自己駆動の棒状のコロイドを組み込む.
  • フレキシクルシステムを研究するために分子ダイナミクスシミュレーションを使用する.

主要な成果:

  • フレキシクルは粒子同士の衝突で形状が変化し,内部棒の動態が変化します.
  • 衝突による形状の変形は,柔らかい動きを遅らせる.
  • 運動性による相分離と自発的な集団流動現象を観察した.
  • 密度の高い組織における細胞移動に類似した新興行動を示した.

結論:

  • フレキシクルの変形性は 活性物質の集合的行動の鍵です
  • この発見は 反応性のある細胞のような活性粒子を 設計するための基礎となるものです
  • マイクロ/コロイドスケールでの群れ移動と自律的な行動の制御の可能性.