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在衰老的视网膜色素上皮质中,缺少素和低乙化

Sushil K Dubey¹, Rashmi Dubey¹, Subhash C Prajapati²

¹Department of Surgery, East Tennessee State University, Johnson City, Tennessee, USA.

|February 26, 2024

概括

衰老会导致视网膜色素表皮质 (RPE) 中的基因损失,影响基因表达和细胞功能. 这项研究揭示了基因组减少是RPE衰老的关键特征,与衰老有关.

科学领域:

表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.
细胞衰老细胞衰老
眼科医生眼科眼科

背景情况:

基因组具有对基因表达和细胞功能至关重要的表观遗传标记.
衰老中的基因素损失会影响染色体结构和基因表达.
衰老的视网膜色素表皮 (RPE) 容易受到表观遗传变化的影响.

研究的目的:

为了研究与年龄相关的组织素水平变化和小鼠RPE和视网膜中的乙化.
探索质素损失和质素位体 (HLB) 复合体在RPE衰老和衰老中的作用.

主要方法:

在老年与年轻小鼠的RPE/choroid和神经视网膜中对基因组水平 (H1,H2A,H2B,H3,H4) 的比较分析.
转录基因分析以确定老年RPE/choroid中下调的基因组和HLB组件.
试验室研究涉及HINFP在人类RPE细胞中的淘汰.
对与年龄相关的RPE基因组损失的人类视网膜截面的分析.
在老老鼠RPE/choroid中进行乙基组组胺 (H3K14ac,H3K56ac,H4K16ac) 分析.

主要成果:

在老年小鼠的RPE/choroid中观察到总体降低了H1,H2A,H2B,H3和H4基因组,但在神经视网膜中没有.
在老年RPE/choroid中,发生了显著的组织蛋白和HLB组件的下调,包括HINFP.
在人类的RPE细胞中,HINFP的淘汰诱导了组蛋白损失,衰老和SASP标记物.
在人类RPE细胞的复制性衰老和时间性衰老中观察到质子损失和SASP获取.
在老老鼠的RPE/choroid中发现了一种特定的乙-希斯特征,包括降低的H3K14ac,H3K56ac和H4K16ac.

结论:

激素损失是RPE衰老的一个明显特征.
在RPE中,与年龄相关的组织蛋白损失与细胞衰老和SASP有关.
这些发现提供了关于连接基斯顿动态,RPE衰老和衰老的机制的见解.

关键词:

在HINFP的研究中,HINFP是HINFP.衰老的衰老衰老的衰老表观遗传学是指表观遗传学.基因素乙化基因素乙化基因素乙化基因组基因组基因组复制性衰老是一种复制性的衰老.视网膜色素表皮质是视网膜色素表皮质.

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