通过胆固醇代谢,PIM1调节CD4+T细胞子集与败血症相关的炎症失衡
Mei Liu1,2,3, Jia-Qi Wang1,2,3,4, Jia-Ning Wang1,2,3,4
1National Clinical Research Center for Laboratory Medicine, The First Hospital of China Medical University, Shenyang, China.
mBio
|September 3, 2025
概括
在败血症期间,Moloney小鼠白血病病毒1 (PIM1) 的前病毒集成部位在CD4+T细胞上调,导致免疫失衡. PIM1通过胆固醇代谢调节Th1,Th17和Treg细胞平衡,为败血症提供治疗点.
科学领域:
- 免疫学
- 分子生物学
- 败血症的发生
背景情况:
- 败血症涉及免疫失衡由调节的亲和抗炎反应驱动.
- CD4+ T 细胞对于败血症的免疫平衡至关重要,分化为效应子集.
- 了解败血症中CD4+T细胞子集机制对于治疗的发展至关重要.
研究的目的:
- 阐明在败血症期间CD4+T细胞子集的炎症和抗炎症失衡的机制.
- 确定免疫失调的关键分子调节剂.
- 探索PIM1和胆固醇代谢在败血症引起的免疫失衡中的作用.
主要方法:
- 综合转录组元分析以确定毒性CD4+T细胞中的上调基因.
- 分析PIM1表达与败血症严重程度的相关性 (SOFA,APACHE II).
- 在体外实验中抑制PIM1激酶活性,RNA测序和胆固醇水平评估.
- 评估CD4+T细胞亚群分化 (Th1,Th17,Treg) 和胆固醇补充剂的影响.
主要成果:
- 来自败血症患者的CD4+T细胞中,莫洛尼小鼠白血病病毒1 (PIM1) 的Proviral整合部位显著上调.
- 与败血症严重程度相关的PIM1表达 (SOFA和APACHE II分数).
- 在抑制Treg分化的同时,PIM1促进了Th1和Th17分化.
- 抑制PIM1导致胆固醇代谢基因ABCG1的上调,并降低了细胞内胆固醇.
- 胆固醇补充可以逆转Th1,Th17和Treg细胞群中的PIM1抑制诱导的变化.
结论:
- 在败血症中,PIM1是CD4+T细胞子集失衡的关键调节者.
- PIM1以胆固醇依赖的方式调节Th1,Th17和Treg平衡.
- 可能由ABCG1调节的胆固醇代谢与PIM1的调节作用有关.
- 这些发现为败血症的发病和免疫调节的潜在治疗目标提供了新的见解.
相关概念视频
Phosphoinositides and PIPs
8.7K
Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
8.7K
Cholesterol: Significance and Regulation
669
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...
669
IP3/DAG Signaling Pathway
12.4K
Membrane lipids such as phosphatidylinositol (PI) are precursors for several membrane-bound and soluble second messengers. Specific kinases phosphorylate PI and produce phosphorylated inositol phospholipids. One such inositol phospholipids are the phosphatidylinositol-4,5 bisphosphate [PI(4,5)P2], present in the inner half of the lipid bilayer. Upon ligand binding, GPCR stimulates Gq proteins to turn on phospholipase Cꞵ. Activated phospholipase Cꞵ cleaves PI(4,5)P2 and...
12.4K
Differentiation of Common Myeloid Progenitor Cells
3.3K
Common myeloid progenitors (CMPs) are oligopotent cells that can differentiate into granulocytes and macrophages. Granulocytes and macrophages are essential for protecting the body against bacterial, viral, or fungal infections. They migrate from the bone marrow into the circulating blood to reach specific tissue sites where they differentiate and help in immune surveillance. However, they survive only for a few days and must be continuously made available to the organism to maintain a robust...
3.3K


