H3K9me3损失和ERVs激活是骨关节炎进展和膝关节衰老的标志
Ye Liu1, Vladimir Molchanov1, Yaguang Zhao1
1Department of Cell Biology, Van Andel Institute, Grand Rapids, MI 49503, USA.
Osteoarthritis and cartilage
|August 17, 2024
概括
内源逆转录病毒 (ERV) 的异常激活与骨关节炎 (OA) 的进展有关. 软骨中H3K9me3表观遗传标记的丢失可能会导致ERV的重新激活,从而导致OA的发病.
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.
- 分子生物学分子生物学
- 类风湿病学 类风湿病学
背景情况:
- 骨关节炎 (OA) 是一种退行性关节疾病,具有复杂的发病因子.
- 内源逆转录病毒 (ERV) 是基因组内古代病毒感染的遗留物.
- 包括ERV在内的异常基因表达越来越多地与各种疾病有关.
研究的目的:
- 调查内源逆转录病毒 (ERV) 激活在骨关节炎 (OA) 进展中的作用.
- 为了比较疾病和完整的OA关节组织中的染色质可访问性和转录基因景观.
- 探索表观遗传修饰,特别是H3K9me3和OA中的ERV活性之间的关系.
主要方法:
- 来自OA患者软骨的ATAC-seq和RNA-seq数据的分析.
- 完整的 (侧侧平原外部区域) 和受损的 (中侧平原内部区域) OA软骨的比较分析.
- 在OA患者和小鼠模型软骨中对全球H3K9me3丰度进行免疫组织化学染色.
主要成果:
- 丰富的染色质可访问性和ERVs的高转录,特别是ERV1和ERVL家族,在OA软骨中.
- 证据表明,在OA中,与H3K9me3相关的异染色素损失和ERV激活之间存在机械联系.
- 全球H3K9me3水平与完整组织相比,在患有OA软骨中显著降低.
结论:
- 可能由于衰老或压力而导致的H3K9me3的损失可能会重新激活ERV,从而导致OA的进展和炎症.
- 这项研究强调了表观遗传变化,ERV激活和OA病变之间的相互作用.
- 这些发现为针对OA的表观遗传机制和ERV活动的治疗策略开辟了道路.
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