毒素菌通过通过SREBP2激活来调节胆固醇生物合成和吸收来维持生存
Yi-Min Fan1, Qing-Qi Zhang2, Ming Pan2
1Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University, and Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, and Jiangsu Key Laboratory of Zoonosis, Yangzhou, Jiangsu Province, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, PR China.
Journal of lipid research
|November 4, 2024
概括
毒素菌感染劫持宿主胆固醇通过上调SREBP2,一个关键的调节器. 抑制SREBP2或胆固醇代谢会损害寄生虫的生长,为毒素菌提供新的治疗点.
科学领域:
- 寄生虫学的寄生虫学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 毒素菌 (T. gondii) 是一种有义务的细胞内寄生虫,缺乏胆固醇生物合成途径.
- 氏菌依赖宿主衍生的胆固醇来维持生存和繁殖.
研究的目的:
- 为了研究宿主胆固醇代谢调节在T. gondii感染期间的作用.
- 为了确定参与T. gondii胆固醇获取的关键宿主因素.
主要方法:
- 对宿主胆固醇合成和摄取基因 (HMGCR,SQLE,DHCR7,LDLR) 的基因表达分析.
- 研究固醇调节元素结合蛋白2 (SREBP2) 的定位和功能.
- SREBP2敲击实验和评估T. gondii的入侵,复制和布拉迪佐伊特的发展.
- 在体外抑制T. gondii复制使用AY9944,一个胆固醇代谢抑制剂.
主要成果:
- 在T. gondii的感染上调节了宿主胆固醇合成 (HMGCR,SQLE,DHCR7) 和摄取 (LDLR) 基因.
- T. gondii感染诱导了SREBP2.2的剂量依赖的核转位.
- 抑制SREBP2显著降低了宿主胆固醇的生物合成和吸收,损害了T. gondii的入侵,复制和布拉迪佐伊特的发展.
- AY9944治疗有效地抑制了T. gondii的复制.
结论:
- SREBP2是T. gondii利用的胆固醇代谢的关键宿主调节器.
- 准SREBP2或宿主胆固醇代谢是一种潜在的治疗策略,可以对抗毒素菌.
相关概念视频
Cholesterol: Significance and Regulation
511
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...
Considering cholesterol and...
511
Regulation of Nuclear Protein Sorting
2.4K
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...
2.4K
Lipid Catabolism
1
Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
1
Biosynthesis of Lipids
1
Microbial membranes exhibit remarkable diversity in lipid composition, reflecting evolutionary adaptations to various environmental conditions. The three domains of life—Bacteria, Archaea, and Eukarya—synthesize membrane lipids through distinct biosynthetic pathways, leading to fundamental structural differences that impact membrane stability, function, and adaptability.Fatty Acid-Based Lipids in Bacteria and EukaryaBacteria and eukaryotes share a common fatty acid biosynthesis...
1


