Gestational zinc deficiency affects the regulation of transcription factors AP-1, NF-κB and NFAT in fetal brain.

Gestational zinc deficiency affects the regulation of transcription factors AP-1, NF-κB and NFAT in fetal brain.
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DOI:
10.1016/j.jnutbio.2009.09.003
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发表时间:
2010-11
影响因子:
5.6
通讯作者:
Oteiza, Patricia I.
Oteiza, Patricia I.
中科院分区:
医学2区
文献类型:
--
作者:
Aimo, Lucila;Mackenzie, Gerardo G.;Keenan, Alison H.;Oteiza, Patricia I.

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转录因子 AP-1、NF-κB 和 NFAT 通过调节调节细胞增殖、分化、凋亡和突触可塑性的基因表达,对大脑发育至关重要。这项工作研究了妊娠期间给母鼠饲喂缺锌和锌含量不足的饮食对胎儿大脑中 AP-1、NF-κB 和 NFAT 调节的影响。 Sprague-Dawley大鼠从妊娠第0天起随意喂养对照饮食(25μg锌/g饮食,C),随意喂养缺锌饮食(0.5μg锌/g饮食,ZD),ZD大鼠进食量的对照饮食(限制喂养,RF),或随意含有边际锌浓度的饮食(10μg锌/g饮食,MZD),直到妊娠第19天。与对照相比,从 ZD、RF 和 MZD 胎儿脑中分离的核部分中的 AP-1-DNA 结合更高 (50-190%)。在 MZD 胎儿大脑中,观察到上游丝裂原激活蛋白激酶 JNK 和 p38 的高水平激活以及 ERK 磷酸化的低水平。 ZD 和 MZD 组中 NF-κB 和 NFAT 激活的总水平分别高于或相似于对照组。然而,ZD 和 MZD 胎儿脑中核组分中 NF-κB- 和 NFAT-DNA 的结合明显低于对照组 (50-80%)。后者可能与缺锌相关的细胞骨架改变有关,而细胞骨架是 NF-κB 和 NFAT 核运输所必需的。总之,妊娠期间锌营养不良可能会对大脑功能造成长期影响,部分原因是转录因子 AP-1、NF-κB 和 NFAT 的失调。
Transcription factors AP-1, NF- κB and NFAT are central to brain development by regulating the expression of genes that modulate cell proliferation, differentiation, apoptosis, and synaptic plasticity. This work investigated the consequences of feeding zinc deficient and marginal zinc diets to rat dams during gestation on the modulation of AP-1, NF- κB and NFAT in fetal brain. Sprague-Dawley rats were fed from gestation day 0 a control diet ad libitum (25 μg zinc/g diet, C), a zinc deficient diet ad libitum (0.5 μg zinc/g diet, ZD), the control diet in the amounts eaten by the ZD rats (restrict fed, RF), or a diet containing a marginal zinc concentration ad libitum (10 μg zinc/g diet, MZD) until gestation day 19. AP-1-DNA binding was higher (50-190%) in nuclear fraction isolated from ZD, RF and MZD fetal brains compared to controls. In MZD fetal brain high levels of activation of the upstream mitogen-activated protein kinases JNK and p38 and low levels of ERK phosphorylation were observed. Total levels of NF- κB and NFAT activation were higher or similar in the ZD and MZD groups than in controls, respectively. However, NF- κB- and NFAT-DNA binding in nuclear fractions was markedly lower in ZD and MZD fetal brain than in controls (50-80%). The latter could be related to zinc deficiency-associated alterations of the cytoskeleton which is required for NF- κB and NFAT nuclear transport. In summary, suboptimal zinc nutrition during gestation could cause long term effects on brain function, partially through a deregulation of transcription factors AP-1, NF- κB and NFAT.
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期刊: DEVELOPMENTAL BRAIN RESEARCH
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