Amniotic fluid activates the nrf2/keap1 pathway to repair an epidermal barrier defect in utero.

Amniotic fluid activates the nrf2/keap1 pathway to repair an epidermal barrier defect in utero.
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DOI:
10.1016/j.devcel.2012.11.002
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发表时间:
2012-12-11
期刊:
影响因子:
11.8
通讯作者:
Roop, Dennis R.
Roop, Dennis R.
中科院分区:
生物学1区
文献类型:
--
作者:
Huebner, Aaron J.;Dai, Daisy;Morasso, Maria;Schmidt, Edward E.;Schaefer, Matthias;Werner, Sabine;Roop, Dennis R.

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角化包膜的主要成分氯氯丙烷的丢失会导致表皮屏障形成的延迟。因此,表皮的生活层被异常地暴露在晚期羊水中,这可能是上调基因的信号,这些基因在功能上补偿氯氯丙烷的损失。与这一假设一致的是,代谢组研究显示,产后14.5天至16.5天期间羊水发生了显著变化。此外,我们还发现,Nrf2/Keap1通路可以检测到这些成分的变化,并直接上调参与代偿反应的基因的表达,从而确保出生后的存活。为了支持这一发现,我们证明了从基因上阻断Nrf2途径可以取消代偿反应,并且先发制人地激活Nrf2在药物上拯救了宫内屏障形成的延迟。我们的发现表明,Nrf2的功能和羊水成分共同进化,确保了功能性屏障的形成。
The loss of loricrin, a major component of the cornified envelope, results in a delay of epidermal barrier formation. Therefore, the living layers of the epidermis are aberrantly exposed to late-stage amniotic fluid, which may serve as the signal to upregulate genes that functionally compensate for the loss of loricrin. Consistent with this hypothesis, metabolomic studies revealed marked changes in amniotic fluid between E14.5 and E16.5 days postcoitum. In addition, we discovered that the Nrf2/Keap1 pathway detects these compositional changes and directly upregulates the expression of genes involved in the compensatory response, thus ensuring postnatal survival. In support of this finding, we demonstrate that genetically blocking the Nrf2 pathway abolishes the compensatory response and that preemptively activating Nrf2 pharmacologically rescues the delay in barrier formation in utero. Our findings reveal that the functions of Nrf2 and the composition of amniotic fluid have coevolved to ensure the formation of a functional barrier.
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