ISM1通过抑制脂肪细胞分化和增强炎症来调节白色脂肪组织的重塑
Yajun Hu1,2, Zhiyuan Shen1, Liu Yang1
1Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, China.
Diabetes, obesity & metabolism
|March 7, 2025
概括
石-1 (ISM1) 蛋白主要来自白色脂肪组织干细胞,破坏脂肪细胞的分化并促进炎症. 这表明ISM1在高脂肪饮食引起的代谢功能障碍中起着关键作用.
科学领域:
- 代谢研究的研究.
- 脂肪组织生物学 脂肪组织生物学
- 细胞分化的细胞分化.
背景情况:
- 伊斯敏-1 (ISM1) 是一种分泌蛋白质,已知可以改善葡萄糖耐受性和减少肝脏脂肪.
- 它在白脂肪组织 (WAT) 重塑中的作用及其对胰岛素敏感性的影响尚不清楚.
- WAT重塑显著影响全身代谢健康.
研究的目的:
- 为了研究伊斯敏-1 (ISM1) 在白脂肪组织 (WAT) 改造中的功能.
- 确定ISM1对脂肪细胞分化和炎症反应的影响.
- 探索ISM1在高脂肪饮食 (HFD) 诱导的代谢变化中的作用.
主要方法:
- 人类和小鼠组织中ISM1表达特征的系统性表征.
- 在实验室研究中,使用小鼠前脂肪细胞细胞系来评估ISM1干预的脂肪细胞分化.
- 在体外评估由棕酸 (PA) 诱导的脂肪细胞和巨细胞的炎症反应.
- 在体内研究涉及ISM1在小鼠白脂肪组织中的过度表达,其次是高脂肪饮食 (HFD).
主要成果:
- 仅在白色脂肪组织干细胞和原始细胞中发现ISM1的表达.
- 在3T3-F442A细胞中ISM1的过度表达抑制了脂肪细胞的分化,并促进了肌纤维细胞样分化.
- 在棕酸 (PA) 刺激下,ISM1在脂肪细胞前体和巨细胞中放大了促炎反应.
- 在体内,小鼠的ISM1过度表达导致抑制脂肪细胞原始体分化,并在HFD期间增加巨细胞在WAT中的积累.
结论:
- 伊斯-1 (ISM1) 主要来自白色脂肪组织中的干细胞/原始细胞.
- ISM1显著促进高脂肪饮食 (HFD) 诱导的白色脂肪组织重塑.
- 这些发现凸显了ISM1的复杂作用和对胰岛素抵抗和代谢障碍的潜在治疗影响.
相关概念视频
Inflammatory Response
1.7K
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,...
1.7K
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
Inflammation
52.2K
Overview
52.2K
T Cell Types and Functions
756
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...
756
TGF - β Signaling Pathway
7.2K
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors...
7.2K


