在性结肠炎中,mTOR通过HIF1信号通路促进炎症反应
Yue Wang1, Ming Li2, AnSheng Zha3
1Department of Gastroenterology, The First Affiliated Hospital of Anhui University of Chinese Medicine, Hefei 230031, People's Republic of China; Graduate School of Anhui University of Chinese Medicine, Hefei 230031, People's Republic of China.
International immunopharmacology
|May 8, 2024
概括
拉巴胺素的哺乳动物标 (mTOR) 通过通过缺氧诱导因子-1α (HIF-1α) 途径促进T辅助者17 (Th17) 细胞分化,加剧性结肠炎 (UC) 炎症. 沉默mTOR可能会减少炎症,这表明mTOR抑制剂是潜在的UC治疗方法.
科学领域:
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
- 分子生物学分子生物学
背景情况:
- 性结肠炎 (UC) 的发病包括T辅助细胞17 (Th17) 和调节性T细胞 (Treg) 之间的不平衡.
- 猛素的哺乳动物标 (mTOR) 影响T细胞分化,但其在UC中的Th17/Treg平衡中的特定作用尚未完全理解.
- 缺氧诱导因子-1α (HIF-1α) 途径与炎症过程有关.
研究的目的:
- 在UC的背景下,研究mTOR调制 (过度表达和沉默) 对HIF-1α-Th17/Treg信号通路的影响.
- 为了确定mTOR是否通过HIF-1α通路调节Th17/Treg细胞平衡和相关的炎症标志物.
- 探索针对mTOR在UC中的治疗潜力.
主要方法:
- 使用HT-29结肠癌上皮细胞和人类CD4+T细胞建立共同培养系统.
- 用瘤坏死因子-α (TNF-α) 治疗共同培养系统以模仿炎症状况.
- 通过过度表达和沉默来操纵mTOR水平,然后对HIF-1α,Th17/Treg比例,糖解以及炎症/抗炎症因素进行分析.
主要成果:
- TNF-α刺激增加了HIF-1α水平,促进了葡萄糖分解,倾斜T细胞分化向Th17,降低了Treg细胞,增加了促炎因素,减少了抗炎因素.
- mTOR沉默导致HIF-1α水平降低,糖分解减少,Th17分化减少,促炎因素降低,抗炎因素增加.
- mTOR过度表达产生了相反的效果,加剧了炎症概况.
结论:
- mTOR通过调节HIF-1α信号通路来促进UC中的炎症,影响Th17/Treg细胞平衡和糖解.
- 沉默mTOR显示出缓解UC相关炎症的潜力.
- 用抑制剂向mTOR是一种有前途的治疗策略,用于治疗性结肠炎.
更多相关视频
相关概念视频
mTOR Signaling and Cancer Progression
3.8K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
3.8K
PI3K/mTOR/AKT Signaling Pathway
3.5K
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...
3.5K
Inflammatory Response
2.0K
An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
2.0K
Regulation 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
T Cell Types and Functions
1.0K
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
1.0K
Regulation of Angiogenesis and Blood Supply
2.6K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
2.6K


