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Microarray of Sirt1 KO and control astrocytes after cocktail stimulation

ABSTRACT: The affection of Sirt1 on astrocyte is not well understanded. Here we studied the change of RNA expression profile after Sirt1 knockout in primary astrocyte after stimulating with A1 astrocyte inducing cocktails. To analyze the change of RNA expression profile after Sirt1 knockout in astrocytes, we built Sirt1 knockout and control astrocytes using crispr technique, and analyzed RNA expression profiles of Sirt1 KO and control astrocytes after treating with cocktail (C1q, IL-1α, TNF-α) by using microarray.

ORGANISM(S): Mus musculus

PROVIDER: GSE212924 | GEO | 2022/10/17

REPOSITORIES: GEO

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Complement C1q-dependent synapse elimination by astrocytes in a mouse model of Alzheimer's disease

Project description:Synapse loss and glial activation are hallmarks of Alzheimer's disease (AD). In Tau P301S transgenic mice, the complement pathway contributes to neuronal damage through microglial elimination of synapses. Here, we used unbiased proteomic profiling of postsynaptic density (PSD) fractions from Tau P301S mice in C1q-WT versus C1q knockout backgrounds to identify C1q-dependent changes at synapses. Integrative multi-omics analysis revealed that astrocyte- and microglia- specific proteins are increased in Tau P301S synapse fractions with age and in a C1q-dependent manner. The same set of glial proteins (including C1q, C4, Gpnmb, and S100a4) is elevated in human AD synaptic fractions, and C4 levels are raised in cerebrospinal fluid (CSF) from AD patients. Besides microglia, we show that astrocytes contribute substantially to excitatory and inhibitory synapse engulfment in Tau P301S hippocampus. Based on staining of synapse markers within lysosomes, astrocytes showed preference for excitatory synapses whereas microglia preferred to engulf inhibitory synapse markers. Genetic deletion of C1q reduced astrocytic eating of excitatory and inhibitory synapses in Tau P301S mice, and rescued synapse density. Together, our data indicate that astrocytes contact and phagocytose synapses in a C1q- dependent manner and thereby contribute to synapse loss and neurodegeneration in AD.

2021-11-03 | MSV000088313 | MassIVE

A SIRT1-centered Circuitry Regulates Breast Cancer Stemness and Metastasis

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SIRT1 and H1AcK26 promoter-association in mouse ES cells changes upon oxidative stress

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RNAseq in Sirt1 wild-type or conditional KO mouse T-ALLs

Project description:C57BL6 mice harboring Sirt1 conditional knockout NOTCH1-DE-induced leukemias were treated with vehicle (control) or tamoxifen to induce isogenic deletion of Sirt1. Here we report the gene expression profile of leukemic blasts obtained from the spleen from control- or tamoxifen-treated leukemic mice.

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SIRT1 and H1AcK26 promoter-association in mouse ES cells changes upon oxidative stress

2010-05-15 | E-GEOD-13075 | biostudies-arrayexpress

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Roles of SIRT1 in Hematopoietic Stem Cell Aging

Project description:The purpose of this study was to determine gene expression changes in hematopoietic stem cells (HSCs) in young and old BALB/c mice, and the impact of Sirt1 gene knockout on HSC aging.

2022-05-04 | GSE169387 | GEO

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