The antidepressant roles of Wnt2 and Wnt3 in stress-induced depression-like behaviors.

The antidepressant roles of Wnt2 and Wnt3 in stress-induced depression-like behaviors.
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Wnt2 和 Wnt3 在应激诱发的抑郁样行为中的抗抑郁作用

DOI:
10.1038/tp.2016.122
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发表时间:
2016-09-13
影响因子:
6.8
通讯作者:
Chen ZY
Chen ZY
中科院分区:
医学1区
文献类型:
--
作者:
Zhou WJ;Xu N;Kong L;Sun SC;Xu XF;Jia MZ;Wang Y;Chen ZY

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wnt信号通路在应激诱导的抑郁样行为的发病机制中起重要作用。然而,有相对较少的直接证据表明Wnt配体对这一过程的影响。在这里,我们研究了Wnts在介导慢性束缚应激(CRS)诱导的抑郁样行为中的作用。我们发现CRS诱导腹侧海马(VH)中Wnt 2和Wnt 3的表达显著降低,但在背侧海马中没有。在VH中敲低Wnt 2或Wnt 3导致Wnt/β-catenin信号传导受损、神经发生缺陷和抑郁样行为。相反,Wnt 2或Wnt 3的过表达逆转了CRS诱导的抑郁样行为。此外,Wnt 2和Wnt 3激活cAMP反应元件结合蛋白(CREB),Wnt 2和Wnt 3之间存在CREB依赖性正反馈。最后,氟西汀治疗增加了VH中的Wnt 2和Wnt 3水平,并且敲低Wnt 2或Wnt 3消除了氟西汀的抗抑郁作用。总之,我们的研究表明Wnt 2和Wnt 3在CRS诱导的抑郁样行为和抗抑郁药中起着重要作用。
Wnts-related signaling pathways have been reported to play roles in the pathogenesis of stress-induced depression-like behaviors. However, there is relatively few direct evidence to indicate the effect of Wnt ligands on this process. Here, we investigated the role of Wnts in mediating chronic restraint stress (CRS)-induced depression-like behaviors. We found that CRS induced a significant decrease in the expression of Wnt2 and Wnt3 in the ventral hippocampus (VH) but not in the dorsal hippocampus. Knocking down Wnt2 or Wnt3 in the VH led to impaired Wnt/β-catenin signaling, neurogenesis deficits and depression-like behaviors. In contrast, overexpression of Wnt2 or Wnt3 reversed CRS-induced depression-like behaviors. Moreover, Wnt2 and Wnt3 activated cAMP response element-binding protein (CREB) and there was CREB-dependent positive feedback between Wnt2 and Wnt3. Finally, fluoxetine treatment increased Wnt2 and Wnt3 levels in the VH and knocking down Wnt2 or Wnt3 abolished the antidepressant effect of fluoxetine. Taken together, our study indicates essential roles for Wnt2 and Wnt3 in CRS-induced depression-like behaviors and antidepressant.
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