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関連する概念動画

Cell Size01:22

Cell Size

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Cell sizes vary widely among and within organisms. Bacterial cells range between 1-10 micrometers (μm)and are considerably smaller than most eukaryotic cells. The smallest bacteria are 0.1 μm in diameter—about a thousand times smaller than eukaryotic cells, which typically range from 10-100 μm.
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Cluster Sampling Method01:20

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Appropriate sampling methods ensure that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
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After budding out from the ER membrane, some COPII vesicles lose their coat and fuse with one another to form larger vesicles and interconnected tubules called vesicular tubular clusters or VTCs. These clusters constitute a compartment at the ER-Golgi interface known as ERGIC (Endoplasmic Reticulum Golgi Intermediate Compartment). The ERGIC is a mobile membrane-bound cargo transport system that sorts proteins secreted from ER and delivers them to the Golgi.
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Genome Size and the Evolution of New Genes03:21

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While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
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A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
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Mitochondria are double-membrane organelles of the eukaryotes involved in cellular metabolism, signaling, ATP synthesis, and programmed cell death.  Each of these processes requires specific proteins and enzymes that must be correctly sorted to the right mitochondrial subcompartment for the proper functioning of the organelle.
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Measurement of Dynamic Scapular Kinematics Using an Acromion Marker Cluster to Minimize Skin Movement Artifact
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動的細菌クラスターのサイズベースのソート

Elham Akbari1, Jason P Beech1, Johannes Kumra Ahnlide2

  • 1Department of Physics, Division of Solid State Physics, Lund University, Lund, Sweden. jonas.tegenfeldt@ftf.lth.se.

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PubMed
まとめ
この要約は機械生成です。

決定論的横方向変位（DLD）マイクロ流体は、A群レンサス菌（GAS）凝集体をサイズ別に効果的に分離します。これにより、細菌クラスターサイズが宿主免疫応答にどのように影響するかについての新たな研究が可能になります。

キーワード:
マイクロ流体工学細菌学免疫学A群レンサス菌宿主病原体相互作用細胞サイズ分離

さらに関連する動画

A Simple Method for the Size Controlled Synthesis of Stable Oligomeric Clusters of Gold Nanoparticles under Ambient Conditions
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Image Processing Protocol for the Analysis of the Diffusion and Cluster Size of Membrane Receptors by Fluorescence Microscopy
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関連する実験動画

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10:07

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A Simple Method for the Size Controlled Synthesis of Stable Oligomeric Clusters of Gold Nanoparticles under Ambient Conditions
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Image Processing Protocol for the Analysis of the Diffusion and Cluster Size of Membrane Receptors by Fluorescence Microscopy
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科学分野:

  • マイクロ流体工学
  • 細菌学
  • 免疫学

背景:

  • A群レンサス菌（GAS）は、複雑で変形可能な様々なサイズの凝集体を形成し、正確な生物学的分析や宿主病原体相互作用の研究を妨げています。
  • 現在の方法では、特定の特性を持つGASクラスターを単離することが困難であり、サイズ依存的な相互作用の研究が制限されています。

研究 の 目的:

  • 細菌凝集体をサイズに基づいて分離するためのマイクロ流体デバイスを開発および検証すること。
  • GAS凝集体のサイズに影響される宿主病原体相互作用の研究を可能にすること。

主な方法:

  • 小さな変位角度を持つ決定論的横方向変位（DLD）マイクロ流体デバイスを設計しました。
  • 臨界直径付近の凝集体の分散を管理するために、中間出口を組み込みました。
  • 画像解析と二重染色実験を使用して、純度を評価し、サンプルへの影響を最小限に抑えました。

主要な成果:

  • DLDデバイスは、有効サイズに基づいてGASクラスターを分離する際に90%以上の純度を達成しました。
  • 細菌クラスターの断片化や追加の凝集は最小限に抑えられました。
  • ヒト免疫細胞は、GAS凝集体のサイズに応じて異なる移動パターンを示しました。

結論:

  • DLDマイクロ流体は、細菌凝集体のサイズベースの分離のための堅牢な方法を提供します。
  • GAS凝集体の生物学的に関連性のある画分が得られ、免疫細胞の挙動に関する研究が容易になります。
  • この技術は、宿主病原体ダイナミクスにおける細菌凝集体のサイズの役割を調査するための道を開きます。