Tcf3 promotes cell migration and wound repair through regulation of lipocalin 2.

Tcf3 promotes cell migration and wound repair through regulation of lipocalin 2.
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DOI:
10.1038/ncomms5088
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发表时间:
2014-06-09
影响因子:
16.6
通讯作者:
Nguyen, Hoang
Nguyen, Hoang
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Miao, Qi;Ku, Amy T.;Nishino, Yudai;Howard, Jeffrey M.;Rao, Ajay S.;Shaver, Timothy M.;Garcia, Gloria E.;Le, Diep N.;Karlin, Kristen L.;Westbrook, Thomas F.;Poli, Valeria;Nguyen, Hoang

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细胞迁移是皮肤伤口愈合过程中上皮再形成的一个组成部分,这是一个涉及分子控制的复杂过程,但目前仍然很大程度上未知。在这里,我们确定了 Tcf3(一种调节胚胎和成人皮肤干细胞功能的重要转录因子)作为表皮伤口修复的关键效应器的新作用。我们发现 Tcf3 在皮肤伤口中表达上调,并且 Tcf3 过度表达可加速角质形成细胞迁移和皮肤伤口愈合。我们还将 Stat3 确定为 Tcf3 的上游调节因子。我们证明 Tcf3 的促迁移作用是非细胞自主的,并且独立于其与 β-连环蛋白相互作用的能力而发生。最后,我们确定 lipocalin-2 是 Tcf3 下游的关键分泌因子,可促进体外细胞迁移和体内伤口愈合。我们的研究结果为伤口相关细胞迁移的分子控制提供了新的见解,并确定了治疗有缺陷的伤口修复的潜在治疗靶点。
Cell migration is an integral part of re-epithelialization during skin wound healing, a complex process involving molecular controls that are still largely unknown. Here we identify a novel role for Tcf3, an essential transcription factor regulating embryonic and adult skin stem cell functions, as a key effector of epidermal wound repair. We show that Tcf3 is upregulated in skin wounds and that Tcf3 overexpression accelerates keratinocyte migration and skin wound healing. We also identify Stat3 as an upstream regulator of Tcf3. We show that the pro-migration effects of Tcf3 are non-cell autonomous and occur independently of its ability to interact with β-catenin. Finally, we identify lipocalin-2 as the key secreted factor downstream of Tcf3 that promotes cell migration in vitro and wound healing in vivo. Our findings provide new insights into the molecular controls of wound-associated cell migration and identify potential therapeutic targets for the treatment of defective wound repair.
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