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相关概念视频

Urea Cycle01:23

Urea Cycle

43.3K
The urea cycle describes how liver cells convert ammonia to urea. Ammonia is a toxic waste product of protein catabolism. Land animals must convert ammonia into the less toxic urea which can be safely eliminated by the kidneys through urine. Marine animals excrete ammonia directly, and the surrounding water dilutes the ammonia to safe levels.
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Overview of Cell Death01:30

Overview of Cell Death

6.2K
Cell death is an essential process where the body gets rid of old or damaged cells. Cell proliferation and death need to be balanced, as an imbalance between the two may lead to cancer or autoimmune diseases.
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the...
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Autophagic Cell Death01:18

Autophagic Cell Death

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Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and...
2.9K
Necrosis01:16

Necrosis

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Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
3.9K
Apoptosis01:30

Apoptosis

10.5K
Apoptosis is a combination of two Greek words, 'apo' and 'ptosis,' meaning separation and falling off, respectively. Hippocrates used this word to describe gangrene, which was caused due to bandaging of fractured bones. Apoptosis was distinguished from necrosis in 1970 when John Kerr reported observations of morphological changes occurring during apoptosis. During one experiment, he observed that the disruption of blood supply to the liver tissue resulted in a size...
10.5K
Phagocytosis of Apoptotic Cells01:17

Phagocytosis of Apoptotic Cells

3.3K
Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or  immature dendritic cells. Non-professional phagocytes such as  epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes. 
Normal cells contain receptors that prevent them from being recognized...
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相关实验视频

Updated: May 23, 2025

Author Spotlight: THP-1 Macrophage Response to LPS/ATP &#8212; Unveiling the Pyroptosis, Apoptosis, and Necroptosis Spectrum
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Author Spotlight: THP-1 Macrophage Response to LPS/ATP — Unveiling the Pyroptosis, Apoptosis, and Necroptosis Spectrum

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超氨血症诱导了编程的肝细胞死亡.

Annarein J C Kerbert1,2, Cornelius Engelmann1,3, Abeba Habtesion1

  • 1Liver Failure Group, Institute for Liver and Digestive Health, University College London, Royal Free Campus, London, UK.

Science advances
|March 7, 2025
PubMed
概括
此摘要是机器生成的。

超血导致肝损伤,纤维生成和细胞死亡,因为它破坏了尿素循环. 抑制RIPK1和TLR4可以保护肝脏免受这些影响,为肝脏疾病提供潜在的治疗点.

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Author Spotlight: THP-1 Macrophage Response to LPS/ATP &#8212; Unveiling the Pyroptosis, Apoptosis, and Necroptosis Spectrum
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科学领域:

  • 肝病学 肝病学是一种肝病学.
  • 细胞生物学 细胞生物学
  • 生物化学 生物化学

背景情况:

  • 超血症在肝硬化中很常见,并且与肝脏脑病变有关.
  • 对于高氨血的肝毒性特异性机制,人们对其了解甚少.
  • 了解这些机制对于控制肝病进展至关重要.

研究的目的:

  • 为了描述慢性高血的肝毒性作用.
  • 为了研究受体相互作用的血清蛋白/氨酸蛋白激酶1 (RIPK1) 和托尔类受体4 (TLR4) 在高氨血症引起的肝损伤中的作用.
  • 探索抑制RIPK1和TLR4.4的治疗潜力.

主要方法:

  • 使用了一种患有慢性高氨血症的小鼠模型,没有先前存在的肝病.
  • 检查了肝脏纤维化,死细胞死亡和尿素循环功能.
  • 研究了RIPK1和TLR4抑制在各种动物模型的高氨血的效果.

主要成果:

  • 慢性高血导致小鼠肝脏纤维化和死细胞死亡.
  • 高氨血导致尿素循环失调,包括酶下调和代谢物积累.
  • 在相关模型中,抑制RIPK1和TLR4改善了肝损伤和降低了氨水平.

结论:

  • 高氨血症驱动肝纤维化和RIPK1-介导的细胞死亡,加上尿素循环功能障碍.
  • 向RIPK1和TLR4显示出对高氨血症引起的肝损伤的保护作用.
  • 抑制RIPK1和TLR4代表了高氨血症和慢性肝病进展的潜在治疗策略.