Identification of the Human Skeletal Stem Cell.

Identification of the Human Skeletal Stem Cell.
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DOI:
10.1016/j.cell.2018.07.029
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发表时间:
2018-09-20
期刊:
影响因子:
64.5
通讯作者:
Longaker MT
Longaker MT
中科院分区:
生物学1区
文献类型:
--
作者:
Chan CKF;Gulati GS;Sinha R;Tompkins JV;Lopez M;Carter AC;Ransom RC;Reinisch A;Wearda T;Murphy M;Brewer RE;Koepke LS;Marecic O;Manjunath A;Seo EY;Leavitt T;Lu WJ;Nguyen A;Conley SD;Salhotra A;Ambrosi TH;Borrelli MR;Siebel T;Chan K;Schallmoser K;Seita J;Sahoo D;Goodnough H;Bishop J;Gardner M;Majeti R;Wan DC;Goodman S;Weissman IL;Chang HY;Longaker MT

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人类骨骼祖细胞的干细胞调节和等级组织仍然在很大程度上未被探索。在这里,我们报告了一个自我更新和多能的人骨骼干细胞(hSSC)的分离,产生骨,软骨和基质的祖细胞,但不是脂肪。自我更新和多能hSSC存在于胎儿和成人骨骼中,并且还可以来源于BMP 2处理的人脂肪基质(B-HAS)和诱导的多能干细胞(iPSC)。单个hSSC的基因表达分析揭示了从不同来源获得的hSSC之间的总体相似性,并部分解释了胎儿和iPSC衍生的hSSC中偏向软骨的分化。hSSC响应于急性骨骼损伤而经历局部扩增。此外,hSSC衍生的基质可以在无血清培养条件下维持人造血干细胞(hHSC)。最后,我们结合联合收割机基因表达和小鼠骨骼干细胞(mSSCs)和hSSCs的表观遗传学数据,以确定进化保守和不同的途径驱动SSC介导的骨骼发生。人类骨骼干细胞的鉴定揭示了骨骼发育和对损伤的反应中保守的和物种特异性的途径,并将指导未来的再生方法。
Stem cell regulation and hierarchical organization of human skeletal progenitors remain largely unexplored. Here, we report the isolation of a self-renewing and multipotent human skeletal stem cell (hSSC) that generates progenitors of bone, cartilage, and stroma, but not fat. Self-renewing and multipotent hSSCs are present in fetal and adult bones and can also be derived from BMP2-treated human adipose stroma (B-HAS) and induced pluripotent stem cells (iPSCs). Gene expression analysis of individual hSSCs reveals overall similarity between hSSCs obtained from different sources and partially explains skewed differentiation towards cartilage in fetal and iPSC-derived hSSCs. hSSCs undergo local expansion in response to acute skeletal injury. In addition, hSSC-derived stroma can maintain human hematopoietic stem cells (hHSCs) in serum-free culture conditions. Finally, we combine gene expression and epigenetic data of mouse skeletal stem cells (mSSCs) and hSSCs to identify evolutionarily conserved and divergent pathways driving SSC-mediated skeletogenesis. Identification of a human skeletal stem cell reveals conserved and species-specific pathways in skeletal development and response to injury and will guide future regenerative approaches.
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