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Genome-wide microarray analysis of brain gene expression in mice on a short-term high iron diet.

机译:短期高铁饮食对小鼠脑基因表达的全基因组微阵列分析。

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摘要

The effects of systemic iron overload on the brain are unclear. Microarray analysis of brain gene expression in mice following short-term iron supplementation revealed altered expression of 287 genes, although most changes were small. Transcripts for the iron storage protein ferritin light chain increased 20% (p=0.002) and transcripts for iron regulatory protein 1, which negatively regulates ferritin translation, decreased 28% (p=0.048). There were expression changes for genes involved in important brain functions such as neurotransmission and nitric oxide signaling, which is dependent on iron. Few changes related to reactive oxygen species, inflammation or apoptosis, however expression changes were observed for genes causatively linked to neurological disorders, including Charcot-Marie-Tooth disease, neuronal ceroid lipofuscinosis and mucolipidosis. The latter involve intralysosomal lipofuscin build-up that may reflect lysosomal iron accumulation. The findings suggest that high iron intake may cause subtle brain effects of clinical relevance in some circumstances.
机译:全身铁超负荷对大脑的影响尚不清楚。短期补铁后小鼠大脑基因表达的微阵列分析显示,虽然大多数变化很小,但287个基因的表达发生了改变。铁储存蛋白铁蛋白轻链的转录物增加20%(p = 0.002),负调节铁蛋白翻译的铁调节蛋白1的转录物减少28%(p = 0.048)。与重要的脑功能有关的基因表达发生变化,例如神经传递和一氧化氮信号传导,这取决于铁。很少有与活性氧,炎症或凋亡相关的变化,但是观察到与神经系统疾病(包括夏科特-玛丽齿病,神经元类脂褐藻病和粘膜脂溢性疾病)有因果关系的基因表达变化。后者涉及溶酶体内脂褐素的积累,可能反映了溶酶体铁的积累。这些发现表明,在某些情况下,高铁摄入量可能会引起与临床相关的微妙脑效应。

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