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相关概念视频

Receptor-mediated Endocytosis01:38

Receptor-mediated Endocytosis

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Overview
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Fimbriae, Pili, and Axial Filaments01:28

Fimbriae, Pili, and Axial Filaments

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Fimbriae and pili are specialized bacterial surface structures that play pivotal roles in adhesion, genetic exchange, and motility. Composed primarily of pilin protein, these hairlike appendages are crucial for bacterial survival and pathogenicity in various environments.Fimbriae: Adhesion and PathogenicityFimbriae are fine, filamentous structures measuring 2–10 nanometers in diameter and are densely distributed on the bacterial cell surface. They facilitate bacterial adhesion to abiotic...
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Adherens Junctions01:24

Adherens Junctions

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Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types –  adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as  epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as  heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
Adherens Junctions are Dynamic
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Receptor-mediated Endocytosis01:20

Receptor-mediated Endocytosis

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Receptor-mediated endocytosis is when bulk amounts of specific molecules are imported into a cell after binding to cell surface receptors. The molecules bound to these receptors are taken into the cell through inward folding of the cell surface membrane, which is eventually pinched off into a vesicle within the cell. Structural proteins, such as clathrin, coat the budding vesicle.
Clathrin-Mediated Endocytosis of LDL
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Intracellular Movement of Viruses and Bacteria01:10

Intracellular Movement of Viruses and Bacteria

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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...
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Intracellular Signaling Affects Focal Adhesions01:17

Intracellular Signaling Affects Focal Adhesions

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Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
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相关实验视频

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Automated, High-Throughput Detection of Bacterial Adherence to Host Cells
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细菌的粘附和进入宿主细胞.

Javier Pizarro-Cerdá1, Pascale Cossart

  • 1Institut Pasteur, Unité des Interactions Bactéries-Cellules, Paris, F-75015 France. pizarroj@pasteur.fr

Cell
|February 25, 2006
PubMed
概括

细菌病原体通过专门的分子机器粘附并入侵宿主细胞. 这种复杂的宿主-病原体相互作用颠覆细胞功能,导致疾病的建立和传播.

科学领域:

  • 微生物学 微生物学
  • 病变的发生和发病.
  • 分子生物学分子生物学

背景情况:

  • 细菌感染依赖于病原体的粘附,殖民和入侵宿主细胞.
  • 复杂的细菌分子机器介导宿主-病原体相互作用.
  • 这些相互作用导致细胞功能和疾病的颠覆.

研究的目的:

  • 阐明细菌用来建立感染的分子机制.
  • 了解细菌粘附和分泌系统是如何促进宿主细胞操纵的.

主要方法:

  • 细菌粘合素和侵入素的分析.
  • 研究大分子机器,如III型分泌系统和IV型分泌系统.
  • 对宿主-病原体分子交叉声的研究.

主要成果:

  • 单质粘合素和侵入素对于最初的细菌附着至关重要.
  • 复杂的机器,如III型分泌系统和IV型 pili,可以进行更深层的组织殖民和侵入.
  • 细菌通过分子交叉通话有效地颠覆宿主细胞功能.

结论:

  • 细菌病原体利用多种分子策略来对宿主细胞进行粘附,入侵和殖民.

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  • 复杂的细菌机械在颠覆宿主防御和确立疾病方面发挥着关键作用.
  • 了解这些机制对于开发新型抗感染疗法至关重要.