Ann Rheum Dis:单细胞RNA-seq分析可以识别半月板祖细胞并揭示半月板变性的进展

2020-01-07 xiangting MedSci原创

识别半月板祖细胞为基于细胞的半月板组织工程学提供了全新的角度,并证明了半月板变性的新机制,而这有助于开发新的治疗策略。

目前半月板细胞的异质性和半月板变性机制尚不清楚。这项研究使用单细胞RNA测序(scRNA-seq)确定各种半月板细胞亚群,并探讨了半月板变性的机制。

使用scRNA-seq识别健康人和退化半月板细胞的细胞亚群及其基因标记,从而确定它们的分化关系并表征特定细胞类型内的多样性。使用集落形成、多分化测定和小鼠半月板损伤模型识别半月板祖细胞。研究人员使用计算分析和实验验证,分析了半月板变性期间变性半月板祖细胞(DegP)细胞簇的作用。

在健康人的半月板中确定了7个细胞簇,其中包括5个根据经验定义的种群和2个新种群。伪时间分析显示,在伪空间轨迹开始时存在内皮细胞和纤维软骨祖细胞(FCP)。黑色素瘤细胞粘附分子((MCAM/CD146)在2个簇中呈高表达。CD146+半月板细胞分化为成骨细胞和脂肪细胞并形成细胞群。研究确定了变性半月板细胞簇比例的变化,并发现了一个具有祖细胞特征的变性半月板特异性簇。对4个祖细胞簇进行重建表明FCP分化为DegP是一个异常过程。在健康人的半月板细胞中,白介素刺激CD318+细胞增多,而在变性半月板细胞中TGFβ1减弱了CD318+细胞的增多。

识别半月板祖细胞为基于细胞的半月板组织工程学提供了全新的角度,并证明了半月板变性的新机制,而这有助于开发新的治疗策略。

原始出处:

Hao Sun. Single-cell RNA-seq analysis identifies meniscus progenitors and reveals the progression of meniscus degeneration. Ann Rheum Dis. December 2019.

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    2020-01-09 lifestar
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    2020-01-09 huangdf
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