通过协调核大小和上皮细胞形态异质性,调节染色质修饰的调节
bioRxiv : the preprint server for biology
|May 7, 2024
概括
表皮细胞和细胞核大小的变化源于不对称的细胞分裂. 这种细胞形态异质性会影响染色体的修饰,影响基因表达和细胞功能.
科学领域:
- 细胞生物学 细胞生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 发育生物学是发展生物学.
背景情况:
- 细胞形态异质性在上皮组织中很常见,但人们对其了解甚少.
- 驱动这种多样性的机制及其功能后果尚不清楚.
研究的目的:
- 研究细胞和细胞核形态异质性在上皮组织的起源.
- 探索核形态学对染色体修饰和基因表达的影响.
主要方法:
- 在多种表皮模型系统中分析细胞和细胞核形态.
- 使用实时成像研究细胞分裂过程.
- 染色体免疫沉,然后进行测序 (ChIP-seq) 来评估基因组修饰.
- 生物化学试验研究基因组脱甲基酶活性.
主要成果:
- 一个日志常态分布的特征是细胞和细胞核区域,表明一致的形态多样性.
- 细胞分裂期间的不对称分区被确定为这种异质性的来源.
- 约束核大小改变了染色质状态,降低了 euchromatin (H3K9ac) 和提高了 heterochromatin (H3K27me3).
- 核的大小被证明可以通过组织素脱甲基酶UTX调节H3K27me3水平.
结论:
- 由不对称的细胞分裂驱动的细胞形态异质性是产生染色体状态多样性的关键因素.
- 染色体状态的这种多样性有助于表皮组织内的功能变化.
- 细胞核形态在表观遗传修饰中起着调节作用,影响细胞功能.
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