STAT3 integrates cytokine and neurotrophin signals to promote sympathetic axon regeneration.

STAT3 integrates cytokine and neurotrophin signals to promote sympathetic axon regeneration.
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DOI:
10.1016/j.mcn.2013.06.005
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发表时间:
2013-09
影响因子:
3.5
通讯作者:
Habecker, Beth A.
Habecker, Beth A.
中科院分区:
医学3区
文献类型:
--
作者:
Pellegrino, Michael J.;Habecker, Beth A.

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转录因子STAT3与轴突再生有关。在这里,我们研究了STAT3在心肌梗死(MI)后交感神经萌发中的作用--心肌梗死是人类的一种常见损伤。我们发现,NGF通过ERK1/2刺激交感神经元中STAT3的丝氨酸磷酸化(S727),而不是Y705的细胞因子磷酸化。体外最大的交感神经轴突再生需要S727和Y705的磷酸化。此外,细胞因子信号转导对于NGF诱导的交感神经在心肌梗死后的心脏发芽是必要的。在缺乏STAT3的神经元中的转基因研究表明,在S727或Y705上有两个独立的STAT3池,它们通过转录和非转录方式调节交感神经再生。更多的数据表明,STAT3与微管的相互作用可能会补充STAT3刺激再生相关基因的已知作用。这些数据表明,STAT3在体外和体内对交感神经轴突再生至关重要,并确定了一种新的非转录作用模式。
The transcription factor STAT3 has been implicated in axon regeneration. Here we investigate a role for STAT3 in sympathetic nerve sprouting after myocardial infarction (MI) - a common injury in humans. We show that NGF stimulates serine phosphorylation (S727) of STAT3 in sympathetic neurons via ERK1/2, in contrast to cytokine phosphorylation of Y705. Maximal sympathetic axon regeneration in vitro requires phosphorylation of both S727 and Y705. Furthermore, cytokine signaling is necessary for NGF-induced sympathetic nerve sprouting in the heart after MI. Transfection studies in neurons lacking STAT3 suggest two independent pools of STAT3, phosphorylated on either S727 or Y705, that regulate sympathetic regeneration via both transcriptional and non-transcriptional means. Additional data identify STAT3-microtubule interactions that may complement the well-characterized role of STAT3 stimulating regeneration associated genes. These data show that STAT3 is critical for sympathetic axon regeneration in vitro and in vivo, and identify a novel non-transcriptional mode of action.
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