相关实验视频

Updated: Jan 14, 2026

The Isolation of Flowing Mesenteric Lymph in Mice to Quantify In Vivo Kinetics of Dietary Lipid Absorption and Chylomicron Secretion

The Isolation of Flowing Mesenteric Lymph in Mice to Quantify In Vivo Kinetics of Dietary Lipid Absorption and Chylomicron Secretion

Published on: November 30, 2022

网站-1蛋白酶介导的胆固醇代谢对于小鼠的淋巴发育至关重要

Yuji Kondo^1,2, Yizhi Jiang¹, Xin Geng¹

¹Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA.

|October 22, 2025

概括

网站-1蛋白酶 (S1P) 和固醇调节元素结合蛋白2 (SREBP2) 途径对于淋巴血管发育至关重要. 这一途径调节胆固醇生物合成,对于淋巴内皮细胞功能和生存至关重要.

科学领域:

血管生物学血管生物学
细胞代谢的细胞代谢.
分子信号传递是分子信号传递.

背景情况:

细胞代谢,包括淋巴内皮细胞 (LEC) 中的糖解和脂肪酸合成,对于淋巴系统发育至关重要.
站点-1蛋白酶 (S1P) 激活了固醇调节元素结合蛋白 (SREBPs),这些蛋白质是脂质生物合成的关键调节者.

研究的目的:

研究S1P-SREBP2轴在淋巴血管发育和功能中的作用.
阐明S1P和SREBP2影响LEC和淋巴血管结构的机制.

主要方法:

产生患有S1P或SREBP2.2全内皮或LEC特异性缺陷的小鼠.
在淘汰赛小鼠中分析淋巴和血液血管系统的发展.
评估脂原基因表达,VEGFR3表达和脂质积累.
在体外研究中,使用人体皮肤LEC治疗了VEGF-C,S1P抑制剂或SREBP抑制剂.

主要成果:

特定于LEC的S1P或SREBP2缺乏导致状,减少脂质生成,减少VEGFR3表达和产后死亡率.
在LEC中SREBP2的缺失导致乳腺扩张,介质淋巴扩张和脂质积累,表明淋巴功能障碍.
在人类LEC中,VEGF-C治疗诱导了SREBP2激活和胆固醇生物合成基因表达,S1P或SREBP抑制剂阻断了这些效应.

结论:

通过S1P-SREBP2介导的胆固醇生物合成途径对于适当的淋巴血管发育和功能至关重要.
S1P/SREBP2轴是LEC中VEGF-C/VEGFR3信号传递的关键组成部分,影响它们的真菌生成反应和生存.

关键词:

内皮细胞是内皮细胞.代谢过程中的代谢.血管生物学血管生物学

更多相关视频

Enrichment of Mammalian Tissues and Xenopus Oocytes with Cholesterol

Enrichment of Mammalian Tissues and Xenopus Oocytes with Cholesterol

Published on: March 25, 2020

Quantification of Atherosclerosis in Mice

Quantification of Atherosclerosis in Mice

Published on: June 12, 2019

相关概念视频

Cholesterol: Significance and Regulation

Cholesterol: Significance and Regulation

Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
Considering cholesterol and...

Regulation of Nuclear Protein Sorting

Regulation of Nuclear Protein Sorting

Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...