在自噬通量增加期间,与神经退行性途径相关的转录靶标与 senataxin 和 E2 启动子结合因子有关。

Transcriptional targets of senataxin and E2 promoter binding factors are associated with neuro-degenerative pathways during increased autophagic flux.

机构信息

Computational and Systems Biology Program, Precision Medicine Theme, South Australian Health and Medical Research Institute, North Terrace, Adelaide, SA, 5000, Australia.

Australian Centre for Precision Health, Cancer Research Institute, University of South Australia, Adelaide, Australia.

出版信息

Sci Rep. 2022 Oct 21;12(1):17665. doi: 10.1038/s41598-022-21617-2.

Abstract

Autophagy is an intracellular recycling process that degrades harmful molecules and enables survival during starvation, with implications for diseases including dementia, cancer and atherosclerosis. Previous studies demonstrate how a limited number of transcription factors (TFs) can increase autophagy. However, this knowledge has not resulted in translation into therapy, thus, to gain understanding of more suitable targets, we utilized a systems biology approach. We induced autophagy by amino acid starvation and mTOR inhibition in HeLa, HEK 293 and SH-SY5Y cells and measured temporal gene expression using RNA-seq. We observed 456 differentially expressed genes due to starvation and 285 genes due to mTOR inhibition (P < 0.05 in every cell line). Pathway analyses implicated Alzheimer's and Parkinson's diseases (P ≤ 0.024 in SH-SY5Y and HeLa) and amyotrophic lateral sclerosis (ALS, P < 0.05 in mTOR inhibition experiments). Differential expression of the Senataxin (SETX) target gene set was predicted to activate multiple neurodegenerative pathways (P ≤ 0.04). In the SH-SY5Y cells of neuronal origin, the E2F transcription family was predicted to activate Alzheimer's disease pathway (P ≤ 0.0065). These exploratory analyses suggest that SETX and E2F may mediate transcriptional regulation of autophagy and further investigations into their possible role in neuro-degeneration are warranted.

摘要

自噬是一种细胞内的回收过程,可降解有害分子,并使细胞在饥饿时存活,这与痴呆、癌症和动脉粥样硬化等疾病有关。先前的研究表明,有限数量的转录因子 (TFs) 如何增加自噬。然而,这方面的知识尚未转化为治疗方法,因此,为了更好地了解合适的靶点,我们采用了系统生物学的方法。我们通过氨基酸饥饿和 mTOR 抑制诱导 HeLa、HEK 293 和 SH-SY5Y 细胞中的自噬,并使用 RNA-seq 测量时间基因表达。我们观察到由于饥饿而导致的 456 个差异表达基因和由于 mTOR 抑制而导致的 285 个基因(在每个细胞系中 P<0.05)。途径分析表明与阿尔茨海默病和帕金森病(在 SH-SY5Y 和 HeLa 中 P≤0.024)和肌萎缩侧索硬化症(ALS,在 mTOR 抑制实验中 P<0.05)有关。预测 Senataxin (SETX) 靶基因集的差异表达将激活多个神经退行性途径(在 P≤0.04)。在神经元起源的 SH-SY5Y 细胞中,E2F 转录家族被预测可激活阿尔茨海默病途径(P≤0.0065)。这些探索性分析表明,SETX 和 E2F 可能介导自噬的转录调节,需要进一步研究它们在神经变性中的可能作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8d2f/9587291/60d6bf25f794/41598_2022_21617_Fig1_HTML.jpg

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