骨质保护素启用免疫逃避病理性脂肪性干细胞驱动肥胖中的代谢功能障碍
bioRxiv : the preprint server for biology
|February 6, 2026
概括
饮食引起的肥胖会导致衰老的脂肪原生细胞 (sAPCs) 在脂肪组织中积累. 这些sAPCs促进免疫变化和代谢功能障碍,但可以通过OPG中和来恢复健康.
科学领域:
- 代谢性疾病研究研究.
- 脂肪组织生物学 脂肪组织生物学
- 细胞衰老 细胞衰老
背景情况:
- 饮食诱导的肥胖 (DIO) 会导致脂肪组织 (AT) 中的衰老性树皮细胞.
- 清除这些衰老细胞可以改善肥胖小鼠的葡萄糖平衡.
- 具体负责衰老的树皮细胞群落仍然未被确定.
研究的目的:
- 为了识别在DIO期间在脂肪组织中积累的衰老 stromal 细胞群.
- 研究这些细胞在代谢功能障碍和免疫重塑中的作用.
- 探索针对这些衰老细胞的治疗策略.
主要方法:
- 来自DIO和对照小鼠的AT stromal细胞的转录概况.
- 基于C12FDG的衰老细胞种群的丰富.
- 对细胞与细胞相互作用和分泌因子 (例如,OPG) 的分析.
- 在体外和体内实验中使用老化剂,iNKT细胞和OPG中和的实验.
主要成果:
- 一个独特的衰老脂肪原始细胞 (sAPCs) 的子集在多个AT存储处积聚在DIO中.
- sAPCs是活跃的结构组织者,促进CCR2依赖的巨细胞化学反应,并将衰老与免疫改造联系起来.
- sAPCs分泌骨质保护蛋白 (OPG),它抑制了iNKT细胞介导的杀死,从而使免疫逃避.
- 在肥胖小鼠中,OPG中和降低了sAPC积累,并使葡萄糖平衡正常化.
结论:
- 衰老的脂肪原生细胞 (sAPCs) 是一种病理性 stromal 群体,在肥胖中不断扩大.
- 由sAPCs分泌的OPG促进免疫逃避,并导致代谢功能障碍.
- OPG和sAPC代表了脂肪组织中代谢和免疫恒温的有希望的治疗点.
相关概念视频
Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion
191
Drug metabolism, a critical process in the liver, involves two primary phases: Phase I reactions and Phase II conjugation. Obesity introduces significant alterations in this metabolic process, primarily due to fatty infiltration of the liver, leading to conditions such as nonalcoholic fatty liver disease (NAFLD). This condition can modify the activities of both Phase I and II enzymes, impacting how drugs are metabolized in obese patients.Phase I metabolism sees variable effects across...
191
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
What is Metabolism?
132.0K
Overview
132.0K
What is the Immune System?
130.5K
Overview
130.5K
Energy to Drive Translocation
2.9K
Mitochondrial protein import is powered by two distinct energy sources: ATP hydrolysis and electrochemical potential across the inner membrane. Newly synthesized precursors are bound by cytosolic chaperones of the Hsp70 family, which guide them to the import receptors on the mitochondrial surface. Utilizing the energy of ATP hydrolysis, Hsp70 chaperones transfer these precursors to the TOM receptors on the mitochondrial outer membrane.
Generally, polypeptides are unfolded by two distinct...
Generally, polypeptides are unfolded by two distinct...
2.9K
M-Cdk Drives Transition Into Mitosis
6.6K
Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
6.6K


