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单核空间转录组测序揭示了鼠标模型中脊椎间盘中明显的刺穿诱导的细胞亚群
Guoyan Liang1, Jing Tan2, Chong Chen1
1Department of Spine Surgery, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, P.R. China.
Clinical and translational medicine
|June 14, 2025
概括
氧化应激通过应激区启动椎间盘退化 (IVDD),激活特定细胞群,如Lcn2+ AFCs和Col3hi NPCs. 这些细胞有助于NP纤维化,而Pdgfra+细胞具有双重起源.
科学领域:
- 生物医学科学 生物医学科学
- 再生医学是一种再生医学.
- 细胞生物学 细胞生物学
背景情况:
- 椎间盘退化 (IVDD) 是一个复杂的过程,涉及细胞和分子变化.
- 了解细胞亚群的时空动态对于开发IVDD有效治疗非常重要.
研究的目的:
- 在IVD退化 (IVDD) 期间调查椎间盘 (IVD) 细胞亚群的时空动态.
- 确定参与IVDD启动和进展的关键细胞群和途径.
主要方法:
- 空间转录组测序 (stRNA-seq) 和单核RNA测序 (snRNA-seq) 在老鼠穿孔诱导的IVDD模型中使用.
- 免疫染和qRT-PCR用于在老鼠和人类IVD中进行验证.
- 使用PdgfraCreERT2;R26tdTomato的谱系追踪小鼠追踪了血小板衍生的生生长因子受体α (Pdgfra) 阳性细胞.
主要成果:
- 穿孔诱导的氧化应激是在一个"应激区"中,其特点是Lcn2+环状纤维细胞 (AFC),这些细胞迁移到细胞核 (NP).
- 科尔希NP细胞 (NPCs) 呈现出具有高表皮-介质细胞过渡激活的纤维肌细胞表型,有助于NP纤维化.
- 血统追踪证实了Pdgfra+ AFCs在NP中的迁移和扩散,这表明NP纤维化的双重起源.
结论:
- 穿孔引起的氧化应激是IVDD的主要发起者.
- 确定了关键细胞亚群 (Lcn2+ AFC,Col3hi NPC,Pdgfra+ AFC) 以及它们在IVDD中的作用.
- 突出了AF衍生细胞对NP退化和NP纤维化复杂细胞起源的贡献.
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