Regeneration of amputated zebrafish fin rays from de novo osteoblasts.

Regeneration of amputated zebrafish fin rays from de novo osteoblasts.
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DOI:
10.1016/j.devcel.2012.03.006
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发表时间:
2012-04-17
期刊:
影响因子:
11.8
通讯作者:
Poss, Kenneth D.
Poss, Kenneth D.
中科院分区:
生物学1区
文献类型:
--
作者:
Singh, Sumeet Pal;Holdway, Jennifer E.;Poss, Kenneth D.

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确定新骨骼元素的细胞来源对于理解两栖动物和鱼类的附属物再生至关重要。最近的谱系追踪研究表明,斑马鱼鳍骨的再生是通过保留的成骨细胞的去分化和增殖来实现的,其他细胞类型的贡献是有限的。在这里,我们通过使用基因消融技术来破坏成年斑马鱼鳍中几乎所有的骨骼成骨细胞来研究这种机制的需求。动物在这种损伤中存活下来,并在两周内恢复了成骨细胞群。此外,失去成骨细胞的断肢鳍再生新的鳍状结构的速度与拥有常驻成骨细胞群的鳍的速度几乎没有区别。诱导遗传命运图谱证实,在这些条件下,新的骨细胞不会从去分化的成骨细胞中产生。我们的研究结果证明了附属骨细胞起源的多样性,并揭示了新生成骨细胞可以完全支持斑马鱼断肢鳍的再生。
Determining the cellular source of new skeletal elements is critical for understanding appendage regeneration in amphibians and fish. Recent lineage-tracing studies indicated that zebrafish fin ray bone regenerates through the de-differentiation and proliferation of spared osteoblasts, with limited if any contribution from other cell types. Here, we examined the requirement for this mechanism by using genetic ablation techniques to destroy virtually all skeletal osteoblasts in adult zebrafish fins. Animals survived this injury and restored the osteoblast population within two weeks. Moreover, amputated fins depleted of osteoblasts regenerated new fin ray structures at rates indistinguishable from fins possessing a resident osteoblast population. Inducible genetic fate-mapping confirmed that new bone cells do not arise from de-differentiated osteoblasts under these conditions. Our findings demonstrate diversity in the cellular origins of appendage bone, and reveal that de novo osteoblasts can fully support the regeneration of amputated zebrafish fins.
DOI: 10.1126/science.1077857
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