在11q13.3处的功能变体rs9344调节了多发性骨髓瘤中CCND1的表达,具有t(11;14)
Hongwei Tang1, Huihuang Yan2, Suganti Shivaram1
1Division of Hematopathology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA.
Leukemia
|October 14, 2024
概括
通过增加CCND1基因表达,rs9344 G等位基因与患多发性骨髓瘤 (MM) 的风险更高有关. 这种遗传变异影响了t(11;14) 转位,这是MM发展的关键因素.
科学领域:
- 遗传学 是一个遗传学.
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 多发性骨髓瘤 (MM) 是一种血细胞恶性瘤,通常由t(11;14) 染色体转位驱动.
- 这种转位导致CCND1基因过度表达,这是MM病变发生的一个关键事件.
研究的目的:
- 为了研究RS9344单核酸多态 (SNP) 在CCND1基因中的作用,在MM中的t(11;14) 转位的背景下.
- 阐明RS9344G等位基因影响CCND1表达和MM发育的分子机制.
主要方法:
- 从两个独立的MM队列 (CoMMpass和梅奥诊所) 的遗传测序数据分析.
- 评估rs9344基因型与t(11;14) 转位的存在/特征之间的关联.
- 使用CRISPR/Cas9基因编辑来将rs9344 A基因转换为G基因,并评估其对CCND1表达和表观遗传标记的影响.
- 使用ENCODE ChIP-seq数据识别RS9344附近的转录因子结合位点,并评估PAX5过度表达的影响.
主要成果:
- 在MM患者中,rs9344 G等位基与t(11;14) 转位显著相关.
- 具有t(11;14) 个体对发生在rs9344 G等位基因上t(11;14) 事件的生物偏好.
- G等位基因与CCND1表达的增加,H3K27ac和H3K4me3基因组修饰的升高有关.
- 通过CRISPR/Cas9介导的转换到G等位基因增加了H3K27ac和CCND1的表达.
- PAX5转录因子优先结合rs9344增强器区域的G等位基因,导致CCND1表达的增加.
结论:
- rs9344 G基因基因基因表现为一个关键的增强元件,促进多发性骨髓瘤中CCND1的过度表达.
- 这种遗传变异及其与PAX5结合的相互作用对具有t(11;14) 转位的MM的发病有显著的贡献.
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