通过表观遗传抑制KLF4和C/EBPδ,CUL4B调节了中酶体干细胞的参与
Ruiqi Yu1, Hong Han1, Shuxian Chu1
1The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Genetics, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, China.
Bone research
|June 2, 2023
概括
库林4B (CUL4B) 对于介质干细胞 (MSC) 承诺至关重要,促进骨形成和抑制脂肪的发展. 它的缺乏会损害骨发育,并使骨质疏松症恶化,突出显示CUL4B.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 介质干细胞 (MSC) 血统承诺对骨健康至关重要,其失调与骨质疏松症和衰老有关.
- 控制MSC承诺的精确分子机制,特别是骨质生成和脂肪生成之间的平衡,尚未完全理解.
研究的目的:
- 确定和描述介质干细胞 (MSC) 承诺的新型调节剂.
- 阐明Cullin 4B (CUL4B) 在调节MSC骨质生成和脂肪生成中的作用.
主要方法:
- 条件淘汰赛小鼠模型被用来评估Cullin 4B (CUL4B) 在介酶干细胞 (MSC) 的体内功能.
- 进行了涉及MSC的体外研究,以调查CUL4B调节基因表达的分子机制.
- 染色体免疫沉 (ChIP) 试验被用来确定CUL4B复合物的直接结合到向基因促进体.
主要成果:
- 在老鼠和人类的骨髓MSCs (BMSCs) 中,库林4B (CUL4B) 表达随着年龄的增长而下降.
- 在MSC中CUL4B的有条件淘汰导致骨发育受损,骨质减少,骨形成减少.
- CUL4B缺乏症加剧了与年龄相关的骨损失和骨髓脂肪组织积累,骨强度降低.
- CUL4B在表观遗传上抑制了KLF4和C/EBPδ的表达,从而促进骨质生成和抑制脂肪生成.
结论:
- 库林4B (CUL4B) 是介质干细胞 (MSC) 谱系承诺的关键表观遗传调节者.
- 通过抑制KLF4和C/EBPδ,CUL4B促进骨质生成,同时抑制脂肪生成.
- 准CUL4B可能为治疗骨质疏松症和与年龄有关的骨质损失提供治疗策略.
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