塞巴的内基增强剂通过长距离循环形成来调节脂肪细胞分化和脂肪组织发育
Xiaokai Li1,2, Sha Zeng1,2, Li Chen3,4,5
1State Key Laboratory of Swine and Poultry Breeding Industry, Sichuan Agricultural University, Chengdu, China.
Cell proliferation
|October 31, 2023
概括
研究人员发现增强剂如何与CEBPA基因促进体相互作用,以控制脂肪细胞 (脂肪细胞) 的发展. 这项研究揭示了脂肪组织形成和功能所必需的关键调节机制.
科学领域:
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
- 细胞生物学 细胞生物学
背景情况:
- Cebpa是脂肪生成的关键转录因子.
- 在脂肪生成过程中调节CEBPA的增强剂-促进剂相互作用的机制尚不清楚.
研究的目的:
- 为了研究Cebpa在脂肪生成过程中的3D染色质结构变化.
- 识别和功能性描述控制CEBPA表达的增强剂.
主要方法:
- 在3T3-L1细胞中循环化染色体构造捕获序列 (4C-seq).
- 表观基因组数据分析和 luciferase 记者测定.
- 对于表观遗传抑制和凝聚力耗尽实验的CRISPR干扰 (dCas9-KRAB).
- 在小鼠部白脂肪组织 (iWAT) 的体内研究.
主要成果:
- 在脂肪细胞中确定了五种CEBPA的活性增强剂.
- 证明抑制增强剂Cebpa-L1-AD-En2或Cebpa-L1-AD-En13可以抑制脂肪生成.
- 显示的凝聚素调解了增强剂和CEBPA促进剂之间的长距离相互作用.
- RXRA和PPARG协同调节Cebpa-L1-AD-En2的活动.
- 在体内抑制Cebpa-L1-AD-En2会影响iWAT发育,减少脂肪细胞大小和改变基因表达.
结论:
- 确定了调节CEBPA表达的功能增强剂.
- Cebpa-L1-AD-En2与Cebpa促进体之间的相互作用对于脂肪细胞的分化至关重要.
- 这种增强剂-促进剂相互作用在脂肪组织发育中起着至关重要的作用.
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