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相关概念视频

Bacterial Signaling01:30

Bacterial Signaling

Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
Contact-dependent Signaling01:19

Contact-dependent Signaling

Contact-dependent signaling, as the name suggests, requires that communicating cells be in direct contact with each other. This is achieved either through receptor-ligand interactions or by specialized cytoplasmic channels that allow the flow of small molecules between cells. In animal cells, channels called gap junctions facilitate contact-dependent signaling in certain tissues, whereas, plasmodesmata perform a similar function in plants.
Gap Junctions
In animal cells, gap junctions are formed...
What is Cell Signaling?02:03

What is Cell Signaling?

Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate to respond to the environment.
Cytoskeletal Proteins in Bacteria01:29

Cytoskeletal Proteins in Bacteria

Bacterial cells were initially considered simple, randomly organized structures lacking a cytoskeleton. However, the discovery of cytoskeleton homologs in bacteria led to the change of this opinion. Bacterial cytoskeletal filaments regulate the cell shape, cell polarity, cell division, and partitioning of plasmids during cell division. It was later discovered that bacterial cytoskeletal proteins, mainly actin and tubulin homologs, are diverse compared to their eukaryotic counterparts. On the...
Intracellular Movement of Viruses and Bacteria01:10

Intracellular Movement of Viruses and Bacteria

Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a virus that...
Microbial Interactions: Cooperation01:26

Microbial Interactions: Cooperation

Microbial cooperation involves beneficial interactions in which different species work together for individual or mutual advantage. These interactions can profoundly influence ecological dynamics and evolutionary processes, and they are essential to many pathogenic and symbiotic relationships.Nematode–Bacteria CooperationA striking example is the relationship between the Gram-negative bacterium Xenorhabdus nematophila and the parasitic nematode Steinernema carpocapsae. Juvenile nematodes...

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相关实验视频

Updated: Jun 4, 2026

Single-cell Microinjection for Cell Communication Analysis
09:59

Single-cell Microinjection for Cell Communication Analysis

Published on: February 26, 2017

细胞间纳米管介导细菌的通信.

Gyanendra P Dubey1, Sigal Ben-Yehuda

  • 1Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, The Hebrew University of Jerusalem, Israel.

Cell
|February 22, 2011
PubMed
概括
此摘要是机器生成的。

细菌通过纳米管进行交流,细胞之间转移分子和基因. 这种新发现的细菌通信方法促进了跨物种的非遗传性耐药性和遗传性特征的获得.

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Assembly and Tracking of Microbial Community Development within a Microwell Array Platform

Published on: June 6, 2017

相关实验视频

Last Updated: Jun 4, 2026

Single-cell Microinjection for Cell Communication Analysis
09:59

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Published on: February 26, 2017

T Cells Capture Bacteria by Transinfection from Dendritic Cells
11:39

T Cells Capture Bacteria by Transinfection from Dendritic Cells

Published on: January 13, 2016

Assembly and Tracking of Microbial Community Development within a Microwell Array Platform
09:24

Assembly and Tracking of Microbial Community Development within a Microwell Array Platform

Published on: June 6, 2017

科学领域:

  • 微生物学 微生物学
  • 细胞生物学 细胞生物学
  • 细菌的传播 细菌的传播

背景情况:

  • 细菌传统上通过分泌的细胞外因子进行交流.
  • 细菌中细胞间直接通信的机制尚未完全理解.
  • 了解细菌相互作用对于医学和生物技术等领域至关重要.

研究的目的:

  • 识别和描述细菌传播的新型形式.
  • 研究纳米管在细胞间分子交换中的作用.
  • 确定纳米管是否有助于遗传物质的转移和特征的获得.

主要方法:

  • 使用Bacillus subtilis作为一个模型生物体.
  • 使用光标记器可视化细胞质分子转移.
  • 使用电子显微镜识别纳米管结构.
  • 进行了抗生素耐药菌株和非结合性等离子体的共同培养实验.

主要成果:

  • 通过纳米管,通过相邻的细菌细胞之间确认了细胞质分子的直接转移.
  • 通过分子交换证明过渡性获得抗生素耐药性.
  • 展示了非结合性等离子体的转移,赋予遗传特征.
  • 在 Bacillus subtilis, Staphylococcus aureus 和 Escherichia coli 之间观察到跨物种的纳米管形成.

结论:

  • 细菌纳米管代表了一种重要的,以前未被描述的细胞间通信模式.
  • 纳米管介导的交换促进了细菌群体的快速适应和遗传多样化.
  • 这种机制为细菌物种内部和之间进行分子和遗传交换提供了一个网络.