12,13-diHOME通过调节肥胖小鼠中的Sestrin2介导的AMPK/ULK1/脂质来改善MASLD
Kexin Zhang1, Chengxia Kan1, Hongyan Qiu1
1Department of Endocrinology and Metabolism, Shandong Provincial Key Medical and Health Laboratory of Endocrinology and Metabolic Diseases, Affiliated Hospital of Shandong Second Medical University, Weifang, China; Clinical Research Center, Affiliated Hospital of Shandong Second Medical University, Weifang, China.
Biochimica et biophysica acta. Molecular basis of disease
|February 6, 2026
概括
12,13-diHOME是棕色脂肪中的脂质,通过促进脂质消化来对抗与代谢功能障碍相关的脂肪性肝病 (MASLD). 这一由Sestrin2调解的过程清除肝脏脂肪,改善代谢健康.
科学领域:
- 代谢性疾病研究研究.
- 肝病学 肝病学是一种肝病学.
- 细胞生物学 细胞生物学
背景情况:
- 与代谢功能障碍相关的脂肪性肝病 (MASLD) 涉及肝脏脂肪积累和脂质代谢受损.
- 脂质,即通过自来降解脂质滴,是MASLD的潜在治疗标.
- 塞斯特林2是一种压力蛋白,通过AMPK/ULK1通路增强脂质.
研究的目的:
- 研究来自棕色脂肪组织的脂质12,13-diHOME在调节MASLD中的作用.
- 为了确定12,13-diHOME是否通过Sestrin2蛋白发挥其作用.
- 探索12,13-diHOME作为MASLD的潜在治疗剂.
主要方法:
- 使用雄性Sestrin2淘汰赛和野生型小鼠食高脂肪饮食 (HFD).
- 向HFD养的小鼠注射了12,13-diHOME,并分析了代谢参数,肝脏组织学和脂质缩标志物.
- 检查了对Sestrin2,AMPK/ULK1信号的表达,以及对12,13-diHOME的反应中的mTOR酸化.
主要成果:
- 12,13-diHOME治疗改善了野生类型小鼠的胰岛素敏感性,降低了血甘油三和自由脂肪酸.
- 在野生型小鼠中,肝硬化和纤维化得到缓解,伴随着增强的脂质.
- 12,13-diHOME增加了塞斯特林2的表达,激活了AMPK/ULK1,抑制了mTOR酸化,并促进了脂质滴滴的降解.
- 在Sestrin2缺乏的小鼠中,这些有益效果是缺失的,这证实了Sestrin2的重要作用.
结论:
- 12,13-diHOME通过增强Sestrin2-介导的脂质,有效地改善了小鼠的MASLD.
- 塞斯特林2对于12,13-diHOME对饮食引起的肝病的保护作用至关重要.
- 12,13-diHOME是MASLD的一种有前途的治疗候选药物,通过Sestrin2-AMPK/ULK1通路起作用.
相关概念视频
Obesity
1.4K
The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in...
1.4K
Regulated Protein Degradation
8.9K
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
8.9K
Master Transcription Regulators
7.8K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
7.8K
Regulation of Expression Occurs at Multiple Steps
26.5K
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
26.5K
Epigenetic Regulation
33.9K
Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
33.9K
GTPases and their Regulation
9.9K
Guanine nucleotide-binding proteins (G-proteins), also known as GTPases, are a superfamily of proteins that regulate many cellular processes, such as cell signaling, vesicular transport, and the regulation of cell shape and motility. Mutation or dysfunction of these proteins can lead to disease. There are around 40,000 known G-proteins that can broadly be classified into two groups ‒ small G-proteins consisting of a single domain and large multi-domain G-proteins.
Large G-proteins,...
Large G-proteins,...
9.9K


