Human chondrogenic paraxial mesoderm, directed specification and prospective isolation from pluripotent stem cells.

Human chondrogenic paraxial mesoderm, directed specification and prospective isolation from pluripotent stem cells.
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DOI:
10.1038/srep00455
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发表时间:
2012
期刊:
影响因子:
4.6
通讯作者:
Nakayama N
Nakayama N
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Umeda K;Zhao J;Simmons P;Stanley E;Elefanty A;Nakayama N

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尚未实现从人多能干(PS)细胞中定向分化和前瞻性分离软骨形成近轴中胚层后代。在这里,我们报告了在含有典型 WNT 信号激活剂、BMP 抑制剂和 Nodal/Activin/TGFβ 信号控制器的化学成分确定的培养基中成功生成了表达近轴中胚层基因和中内胚层报告基因 MIXL1-GFP 的 KDR−PDGFRα+ 后代。分离的 (GFP+)KDR−PDGFRα+ 中胚层细胞对连续添加三种软骨形成因子 PDGF、TGFβ 和 BMP 敏感。在这些条件下,细胞在微团培养中表现出强大的软骨形成活性,并在无血清培养基中产生透明样半透明软骨颗粒。相比之下,来自成人骨髓的STRO1+间充质干/基质细胞和hPS细胞自发产生的间充质细胞在体外表现出相对较弱的软骨形成反应,并形成更多的纤维化软骨颗粒。因此,hPS细胞衍生的KDR−PDGFRα+近轴中胚层样细胞在工程化软骨形成和软骨修复中具有潜力。
Directed specification and prospective isolation of chondrogenic paraxial mesoderm progeny from human pluripotent stem (PS) cells have not yet been achieved. Here we report the successful generation of KDR−PDGFRα+ progeny expressing paraxial mesoderm genes and the mesendoderm reporter MIXL1-GFP in a chemically defined medium containing the canonical WNT signaling activator, BMP-inhibitor, and the Nodal/Activin/TGFβ signaling controller. Isolated (GFP+)KDR−PDGFRα+ mesoderm cells were sensitive to sequential addition of the three chondrogenic factors PDGF, TGFβ and BMP. Under these conditions, the cells showed robust chondrogenic activity in micromass culture, and generated a hyaline-like translucent cartilage particle in serum-free medium. In contrast, both STRO1+ mesenchymal stem/stromal cells from adult human marrow and mesenchymal cells spontaneously arising from hPS cells showed a relatively weaker chondrogenic response in vitro, and formed more of the fibrotic cartilage particles. Thus, hPS cell-derived KDR−PDGFRα+ paraxial mesoderm-like cells have potential in engineered cartilage formation and cartilage repair.
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