在白色脂肪组织发育和新陈代谢中,C/EBPα的仓库特定作用
Krista Y Hu1, Esme A Dodge1, Olivia A B Maguire1
1Cardiometabolic Genomics Program, Division of Cardiology, Department of Medicine, Columbia University, New York, NY 10032.
bioRxiv : the preprint server for biology
|August 8, 2025
概括
转录因子C/EBPα对于白色脂肪组织 (WAT) 的发育和分布至关重要. 在小鼠中,脂肪细胞特异性Cebpa淘汰揭示了仓库特异性的作用和对代谢平衡的影响.
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
- 遗传学和基因调节的研究.
背景情况:
- 肥胖和相关代谢并发病率的上升凸显了需要了解白色脂肪组织 (WAT) 分布的必要性.
- 遗传学研究将CEBPA基因附近的单核酸多态 (SNPs) 与心脏代谢特征联系起来,这表明它在WAT分布中发挥了作用.
- CEBPA编码C/EBPα,这是已知的脂肪细胞分化的调节器,但其仓库特异性的功能仍然不清楚.
研究的目的:
- 调查转录因子C/EBPα在白脂肪组织 (WAT) 发育和功能中的仓库特异性作用.
- 阐明CEBPA影响WAT分布的机制及其与代谢疾病的联系.
主要方法:
- 产生细胞特异性Cebpa淘汰赛 (Cebpa_ASKO) 鼠标.
- 在Cebpa_ASKO小鼠中分析WAT储存特征 (例如脂肪细胞大小和数量).
- RNA测序 (RNA-seq) 和功能性研究,以评估脂质代谢和脂肪细胞功能.
- 评估代谢表型,包括棕色脂肪组织 (BAT),肝脏甘油三和血胆固醇.
主要成果:
- Cebpa_ASKO小鼠几乎完全缺少淋巴腺WAT (gWAT),但保留了 inguinal WAT (iWAT).
- 尽管在Cebpa_ASKO小鼠中发展了iWAT,但在高脂肪饮食条件下脂肪细胞较少,较大,扩张受损.
- 在Cebpa_ASKO iWAT中观察到脂肪代谢和脂肪细胞功能的改变.
- 代谢障碍包括含脂量较高的BAT,肝脏甘油三脂的增加和血胆固醇的升高,高脂肪食加剧了这种情况.
结论:
- C/EBPα 在脂肪组织发育中起关键的仓库特异性作用.
- 脂肪细胞C/EBPα对于维持新陈代谢平衡至关重要.
- 准C/EBPα可能为与肥胖相关的代谢疾病提供新的治疗策略.
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