相关实验视频
Updated: Jul 11, 2025
08:58
Optimized Analysis of In Vivo and In Vitro Hepatic Steatosis
Published on: March 11, 2017
16.0K
拉普1激活保护脂肪肝和非酒精性胆固醇肝炎的发展
bioRxiv : the preprint server for biology
|November 14, 2023
概括
在肥胖症中肝脏Rap1a蛋白质缺乏会使脂肪肝和葡萄糖不耐症恶化. 恢复Rap1a活性可以改善肝硬化症并降低脂质基因,这表明对非酒精性脂肪性肝病 (NAFLD) 和NASH的治疗潜力.
科学领域:
- 代谢性疾病是一种代谢性疾病.
- 肝病学 肝病学是一种肝病学.
- 分子信号传递是分子信号传递.
背景情况:
- 小G蛋白Rap1a的肝脏激活在肥胖中被抑制,导致葡萄糖产量增加和不耐受.
- 在肥胖小鼠肝脏中抑制Rap1a有助于脂肪肝的形成,这是糖尿病肝病的特征.
研究的目的:
- 研究肝脏Rap1a在非酒精性脂肪性肝病 (NAFLD) 和非酒精性脂肪性肝炎 (NASH) 中的作用.
- 探索Rap1a作为代谢功能障碍和肝硬化症的潜在治疗点.
主要方法:
- 在人类NASH患者和NAFLD/NASH小鼠模型中评估了Rap1a活性.
- 在小鼠模型中利用了Rap1a的遗传操纵 (过度表达/缺乏).
- 研究了Rap1a,Srebp1处理和mTORC1信号之间的机制联系.
- 在肥胖小鼠中测试了Rap1a (8-pCPT) 的小分子激活剂和Rap1Gap的抑制剂.
主要成果:
- 在NASH患者的肝脏和NAFLD/NASH小鼠模型中,Rap1a活性下降.
- 恢复肝脏Rap1a抑制的Srebp1处理和肝脏甘油三积累,改善脂肪.
- 通过通过mTORC1过度激活增加Srebp1处理,Rap1a缺乏症加剧了肥胖症.
- 肥胖小鼠中Rap1a的药理激活改善了肝硬化症和降低了脂原基因表达.
结论:
- 肝脏Rap1a作为肝脏葡萄糖生成和脂肪的关键抑制剂.
- 抑制肝脏的Rap1a活性有助于产生葡萄糖不耐症和NAFLD/NASH.
- 准肝脏Rap1a活动为NAFLD/NASH和相关代谢障碍提供了一个有前途的治疗策略.
更多相关视频
08:35A Model of Experimental Steatosis In Vitro: Hepatocyte Cell Culture in Lipid Overload-Conditioned Medium
Published on: May 18, 2021
6.4K
07:03Author Spotlight: Establishing MASLD Cell Models for Investigating Disease Mechanisms and the Lipid-Lowering Effects of Koumiss
Published on: July 19, 2024
930
相关概念视频
01:31Regulation of the Unfolded Protein Response
2.4K
Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
2.4K
01:22PI3K/mTOR/AKT Signaling Pathway
3.6K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
3.6K
01:24Liver Regeneration
3.3K
The liver is an important organ in vertebrates that plays an essential role in metabolism. It is also responsible for storing and redistributing nutrients such as carbohydrates, fats, and vitamins in the body. Additionally, the liver releases bile salts which are critical for digesting food and eliminating toxic metabolites from the body.
Cells of Liver
The liver comprises four major types of cells— hepatocytes, stellate, Kupffer, and sinusoidal endothelial cells. The hepatocytes are...
Cells of Liver
The liver comprises four major types of cells— hepatocytes, stellate, Kupffer, and sinusoidal endothelial cells. The hepatocytes are...
3.3K
01:24Chronic Pancreatitis I: Introduction
93
The pancreas, an elongated and flat gland situated behind the stomach, serves a vital function in digesting food and managing blood sugar levels.
Pancreatitis is the inflammation of the pancreas, which occurs when the immune system becomes active and causes swelling, pain, and disruptions in organ function. Pancreatitis can manifest as either an acute or chronic condition.
Acute pancreatitis arises suddenly and lasts for a brief duration, while chronic pancreatitis is a long-term affliction...
Pancreatitis is the inflammation of the pancreas, which occurs when the immune system becomes active and causes swelling, pain, and disruptions in organ function. Pancreatitis can manifest as either an acute or chronic condition.
Acute pancreatitis arises suddenly and lasts for a brief duration, while chronic pancreatitis is a long-term affliction...
93