C-Jun N-terminal kinase (JNK) mediates Wnt5a-induced cell motility dependent or independent of RhoA pathway in human dental papilla cells.

C-Jun N-terminal kinase (JNK) mediates Wnt5a-induced cell motility dependent or independent of RhoA pathway in human dental papilla cells.
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C-Jun N 末端激酶 (JNK) 介导人牙乳头细胞中 Wnt5a 诱导的细胞运动依赖或独立于 RhoA 途径

DOI:
10.1371/journal.pone.0069440
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Ye L
Ye L
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Wang C;Zhao Y;Su Y;Li R;Lin Y;Zhou X;Ye L

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WNT5A通过调节细胞迁移在组织发育中发挥重要作用,但其分子机制仍不完全清楚。我们的研究探讨了牙本质和牙髓形成过程中参与WNT5a依赖的细胞运动的途径。Wnt5a的过表达促进了人牙乳头细胞(HDPC)的细胞黏附和焦点黏附复合体(FACS)的形成,而抑制了细胞的迁移。Wnt5a刺激不是激活hDPC中典型的Wnt信号通路,而是以RhoA依赖或独立的方式诱导JNK信号的激活。抑制JNK可阻断Wnt5a诱导的FACS的形成,但不影响细胞骨架重排。显性负性RhoA(RhoA T19N)和成分活性RhoA突变体(RhoA Q63L)也阻断了依赖Wnt5a的hDPC黏附、迁移和细胞骨架重排的变化,但FAC的形成除外。综上所述,我们的研究表明,RhoA和JNK信号通路在介导Wnt5a依赖的hDPC的黏附和迁移中起作用,而Wnt5a/JNK通路的作用依赖于和不依赖于RhoA通路。
Wnt5a plays an essential role in tissue development by regulating cell migration, though the molecular mechanisms are still not fully understood. Our study investigated the pathways involved in Wnt5a-dependent cell motility during the formation of dentin and pulp. Over-expression of Wnt5a promoted cell adhesion and formation of focal adhesion complexes (FACs) in human dental papilla cells (hDPCs), while inhibiting cell migration. Instead of activating the canonical Wnt signal pathway in hDPCs, Wnt5a stimulation induced activation of the JNK signal in a RhoA-dependent or independent manner. Inhibiting JNK abrogated Wnt5a-induced FACs formation but not cytoskeletal rearrangement. Both dominant negative RhoA (RhoA T19N) and constitutively active RhoA mutants (RhoA Q63L) blocked the Wnt5a-dependent changes in hDPCs adhesion, migration and cytoskeletal rearrangement here too, with the exception of the formation of FACs. Taken together, our study suggested that RhoA and JNK signaling have roles in mediating Wnt5a-dependent adhesion and migration in hDPCs, and the Wnt5a/JNK pathway acts both dependently and independently of the RhoA pathway.
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