Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853, USA.
Aging Cell. 2012 Aug;11(4):717-21. doi: 10.1111/j.1474-9726.2012.00831.x. Epub 2012 Jun 4.
Host cell factor-1 (HCF-1) is a conserved regulator of the longevity and stress response functions of DAF-16/FOXO. SKN-1 transcription factor is an evolutionarily conserved xenobiotic stress regulator and a pro-longevity factor. Here, we demonstrate that SKN-1 contributes to the enhanced oxidative stress resistance incurred by hcf-1 mutation in C. elegans. HCF-1 prevents the nuclear accumulation of SKN-1 and represses the transcriptional activation of SKN-1 specifically at target genes involved in cellular detoxification pathways. Our findings reveal a novel and context-specific regulatory relationship between two highly conserved longevity and stress response factors HCF-1 and SKN-1.
宿主细胞因子-1 (HCF-1) 是 DAF-16/FOXO 寿命和应激反应功能的保守调节剂。SKN-1 转录因子是一种进化上保守的外来应激调节剂和促长寿因子。在这里,我们证明 SKN-1 有助于增强 hcf-1 突变引起的秀丽隐杆线虫的氧化应激抗性。HCF-1 阻止 SKN-1 的核积累,并特异性地抑制参与细胞解毒途径的靶基因的 SKN-1 的转录激活。我们的发现揭示了两种高度保守的寿命和应激反应因子 HCF-1 和 SKN-1 之间的一种新的、特定于上下文的调节关系。