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相关概念视频

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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Tight Junctions01:29

Tight Junctions

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Tight junctions are molecular seals between cells that prevent the leaking of fluids, ions, and other small solutes across cavities and compartments in multicellular organisms. They are mainly composed of claudin and occludin transmembrane proteins, and other proteins such as tricellulin and JAM (junctional adhesion molecule). All these proteins are 4-pass transmembrane proteins, except JAM, which is a single-pass transmembrane protein belonging to the immunoglobulin superfamily. The...
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Microvilli00:55

Microvilli

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Microvilli are tiny finger-like projections found on the surface of certain cells. Their purpose is to increase the surface area of the cell's apical surface, resulting in more effective absorption or secretion of substances.
These microvilli are predominantly present in cells lining the small intestine, kidney tubules, and certain cells in the respiratory and reproductive systems. By significantly expanding the surface area of the cell membrane, microvilli enhance the cell's capacity...
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Mucosal Barrier of the Stomach01:25

Mucosal Barrier of the Stomach

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The gastric glands contain parietal cells that secrete hydrochloric acid (HCl) for digestion. The cells secrete HCl because it is highly corrosive and essential for breaking down food. To achieve this, they secrete hydrogen and chloride ions into the lumen of the gastric glands, which combine to form HCl.
Within parietal cells, carbonic acid is first formed through the reaction of water and carbon dioxide. The dissociation of carbonic acid releases bicarbonate and hydrogen ions. The bicarbonate...
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Immunoglobulin-like Cell Adhesion Molecules01:31

Immunoglobulin-like Cell Adhesion Molecules

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Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
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Role Of Notch Signalling In Intestinal Stem Cell Renewal01:12

Role Of Notch Signalling In Intestinal Stem Cell Renewal

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Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
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An Intravital Microscopy-Based Approach to Assess Intestinal Permeability and Epithelial Cell Shedding Performance
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在肠道屏障功能和炎症中,微小体间粘附复合体具有关键作用.

Bernadette Mödl1, Katy Schmidt2, Doris Moser3

  • 1Center for Cancer Research, Medical University of Vienna & Comprehensive Cancer Center, 1090 Vienna, Austria.

Exploration of digestive diseases
|August 2, 2024
PubMed
概括

微小细胞间粘附复合体 (IMAC) 组织肠道细胞的刷边缘. IMAC功能障碍导致微型病毒的失调,这表明炎症性肠病的潜在上皮原点.

关键词:
炎症性肠病是一种炎症性肠病.细菌 细菌 细菌是一种细菌.刷边界边界 刷边界边界大肠炎是一种大肠炎.微生物组是一个微生物组.我们的微生物群.微型微型微型微型.

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科学领域:

  • 细胞生物学 细胞生物学
  • 胃肠病学 胃肠病学
  • 免疫学 免疫学 免疫学

背景情况:

  • 肠上皮细胞具有由微组成的刷边缘,对营养吸收和屏障功能至关重要.
  • 2014年发现的微小体间粘附复合体 (IMAC) 负责微小体的空间组织.
  • 在炎症性肠病 (IBD) 中观察到的微细菌失组织,与免疫功能障碍有关,但现在认为是上皮起源.

研究的目的:

  • 探索刷边界和IMAC在维护肠道屏障完整性的作用.
  • 调查IMAC功能与肠道炎症之间的潜在联系.
  • 提出IMAC的交叉连接功能作为一种防护机制,防止炎症.

主要方法:

  • 关于微型菌,IMAC和炎症性肠病的现有文献的审查.
  • 在小鼠模型中分析了涉及IMAC组件 (例如CDHR2) 遗传删除的研究.
  • 在肠道健康的背景下讨论IMAC的结构和功能影响.

主要成果:

  • 删除IMAC组件会导致微型病毒的破坏和散发,这是IBD中观察到的表型.
  • 对于其结构完整性来说,IMAC对刷边界的定期空间组织至关重要.
  • 这些发现表明,上皮对IBD的发病有潜在的贡献.

结论:

  • 在保持刷边界结构和功能方面,IMAC起着至关重要的作用.
  • IMAC功能障碍可能会导致炎症性肠病中出现的上皮缺陷.
  • IMAC的微型病毒交叉链接活动可能会保护肠道免受炎症,将重点转向IBD的上皮起源.