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受体激活器NF-κB (RANK) 基因促进区的CpG甲基化划定了与衰老相关的RANK基因表达的减少
Riko Kitazawa1,2, Ryuma Haraguchi1, Yuki Murata1
1Department of Molecular Pathology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan.
Acta histochemica et cytochemica
|September 4, 2024
概括
与年龄相关的DNA甲基化减少了骨质细胞前体中的受体激活剂NF-κB (RANK) 基因表达. 这种表观遗传变化通过损害骨形成,有助于老年骨质疏松症的发展.
科学领域:
- 老年学是指老年学的学科.
- 分子生物学分子生物学
- 骨生物学 骨生物学 骨生物学
背景情况:
- 绝经后的骨质疏松症与雌激素的下降有关,但老年人老年骨质疏松症的原因尚不清楚.
- 衰老会影响骨密度,导致骨质疏松症,无论性别如何,其潜在机制尚不清楚.
研究的目的:
- 为了研究与年龄相关的受体激活器NF-κB (RANK) 基因在骨质细胞生成中的表观遗传调节.
- 为了确定DNA甲基化在老年骨质疏松症的发病过程中的作用.
主要方法:
- 作为一个体外衰老模型,利用了一种高过渡的小鼠骨质细胞原生细胞系 (RAW264.7).
- 采用甲基化特异性PCR,二硫酸盐映射和ICON探针介导的现场评估来分析RANK基因促进物甲基化.
- 从年轻和老老的小鼠身上进行脏巨细胞的ex vivo培养.
主要成果:
- RAW264.7细胞的重复传递导致RANK表达的下调和骨质细胞生成的减少.
- 在老化细胞和经过细胞中观察到RANK基因促进体中CpG位点的高甲基化.
- 脱甲基剂治疗恢复了RANK表达和骨质细胞形成,而老年小鼠在巨细胞中显示出CpG甲基化占主导地位,减少了RANK表达.
结论:
- 骨质细胞前体细胞中与年龄相关的DNA甲基化积累减少了RANK的表达.
- 这种表观遗传机制导致骨质细胞形成减少,可能导致老年骨质疏松症的低转换骨特征.
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