Imparting regenerative capacity to limbs by progenitor cell transplantation.

Imparting regenerative capacity to limbs by progenitor cell transplantation.
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DOI:
10.1016/j.devcel.2012.11.017
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发表时间:
2013-01-14
期刊:
影响因子:
11.8
通讯作者:
Slack, Jonathan M. W.
Slack, Jonathan M. W.
中科院分区:
生物学1区
文献类型:
--
作者:
Lin, Gufa;Chen, Ying;Slack, Jonathan M. W.

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非洲爪蟾在早期发育阶段通常可以再生四肢,但在变态过程中失去了这种能力。这种行为提供了一个潜在的功能获得模型的措施,可以提高肢体再生。在这里,我们表明,青蛙四肢可以形成多指再生后,接受移植的幼虫肢体祖细胞。需要激活细胞中的Wnt/β -catenin信号传导,并添加Sonic hedgehog、FGF 10和胸腺素β4。这些因子促进移植细胞的存活和生长,并提供模式信息。最终的再生体不仅仅由供体组织组成;尽管宿主细胞缺乏再生能力,但它们也做出了实质性的贡献。来自成年青蛙腿或再生蝌蚪尾巴的细胞不能促进肢体再生,这证明了肢体祖细胞的必要性。这些发现对于开发促进哺乳动物肢体再生的技术具有明显的意义。
The frog Xenopus can normally regenerate its limbs at early developmental stages but loses the ability during metamorphosis. This behavior provides a potential gain-of-function model for measures that can enhance limb regeneration. Here we show that frog limbs can be caused to form multidigit regenerates after receiving transplants of larval limb progenitor cells. It is necessary to activate Wnt/β -catenin signaling in the cells, and to add Sonic hedgehog, FGF10 and thymosin β4. These factors promote survival and growth of the grafted cells and also provide pattern information. The eventual regenerates are not composed solely of donor tissue; the host cells also make a substantial contribution despite their lack of regeneration-competence. Cells from adult frog legs or from regenerating tadpole tails do not promote limb regeneration, demonstrating the necessity for limb progenitor cells. These findings have obvious implications for the development of a technology to promote limb regeneration in mammals.
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