单细胞RNA测序揭示了在产后核脉中出现的诺托科德衍生的细胞亚群
bioRxiv : the preprint server for biology
|June 9, 2023
概括
研究人员在脊柱中发现了不同的早期和晚期细胞核. 被Cd9标记的晚期细胞对于维持脊椎盘外细胞基质至关重要,并可能改善腰痛的治疗方法.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 再生医学是一种再生医学.
背景情况:
- 椎间盘退化是慢性腰部疼痛的主要原因.
- 目前用于磁盘退行症的基于细胞的疗法在复制原生核脉细胞功能方面面临挑战.
- 核脉细胞是独特的骨细胞,起源于胚胎内.
研究的目的:
- 为了研究出生后小鼠圆盘中来自心弦核的核脉细胞中的异质性.
- 识别不同细胞群的新型标记物和功能特征.
- 探索这些细胞在维护磁盘细胞外基质中的作用以及它们与退化的潜在相关性.
主要方法:
- 产后小鼠脊椎间盘的单细胞RNA测序.
- 核脉动细胞亚群的识别和表征.
- 在山羊椎间盘退化模型中进行免疫组织化学分析和验证.
主要成果:
- 发现了两个不同的细胞群:早期 (原始) 和晚期 (成熟) 细胞.
- 晚期细胞表现出更高的细胞外基因基因表达和增强的TGF-β和PI3K-Akt信号传递.
- Cd9被确定为晚期细胞的新型表面标记物,位于磁盘外围,与富含糖氨基甘氨酸的基质相关.
- 在一只山羊的磁盘退化模型中,Cd9+细胞数量下降,表明它们在矩阵维护中的作用.
结论:
- 确定了在产后脊柱中具有不同功能的独特细胞群.
- Cd9标志着成熟的细胞核,这些细胞对细胞外基质维护至关重要.
- 了解这些发育机制可以推进对磁盘退化和腰部疼痛的再生策略.
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