GSE163237
Functional network of the long non-coding RNA growth arrest specific transcript 5 (GAS5) and its interacting proteins in senescence
Increasing studies show that long non-coding RNAs (lncRNAs) play essential roles in various fundamental processes. Long non-coding RNA growth arrest-specific transcript 5 (GAS5) showed differential expressions between young and old mouse brains in our previous RNA-Seq data, suggesting its potential role in senescence and brain aging. Examination using RT-qPCR revealed that GAS5 had a significantly higher expression level in old mouse brain hippocampus region than the young one. Cellular fractionation using hippocampus-derived HT22 cell line confirmed its nucleoplasm and cytoplasm subcellular localization. We then performed overexpression (OE) or knockdown (KD) of GAS5 in HT22 cell line and found that GAS5 inhibits cell cycle progression and promotes cell apoptosis. RNA-Seq analysis of GAS5-knockdown HT22 cell identified differential expressed genes related to cell proliferation (e.g., DNA replication and nucleosome assembly biological processes). RNA pull-down assay using mouse brain hippocampus tissues revealed that potential GAS5 interacting proteins can be enriched into several KEGG pathways and some of them are involved in senescence associated diseases such as Parkinson and Alzheimer's Disease. These results contribute to better understand the underlying functional network of GAS5 and its interacting proteins in senescence at brain tissue and brain-derived cell line levels. Our study may also provide reference for developing diagnostic and clinic biomarkers of GAS5 in senescence and brain aging. Overall design: RNA-seq of GAS5 knock down in HT22 cells