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TMT mass spectrometry analysis of wild type and Mecp2 null mouse CSF of animals aged 46 days

ABSTRACT: TMT mass spectrometry analysis of wild type and Mecp2 null mouse CSF of animals aged 46 days

INSTRUMENT(S): Orbitrap Fusion Lumos

ORGANISM(S): Mus Musculus (mouse)

TISSUE(S): Cerebrospinal Fluid

SUBMITTER: Duc Duong

LAB HEAD: Victor Faundez

PROVIDER: PXD029809 | Pride | 2022-10-14

REPOSITORIES: Pride

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			Action	DRS
	checksum.txt	Txt
	vf_2batch_mousecsftmtmutliconcensus_InputFiles.txt	Txt
	vf_2batch_mousecsftmtmutliconcensus_PeptideGroups.txt	Txt
	vf_2batch_mousecsftmtmutliconcensus_Proteins.txt	Txt
	vf_b1_01.raw	Raw

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Publications

Convergent cerebrospinal fluid proteomes and metabolic ontologies in humans and animal models of Rett syndrome.

Zlatic Stephanie A SA Duong Duc D Gadalla Kamal K E KKE Murage Brenda B Ping Lingyan L Shah Ruth R Fink James J JJ Khwaja Omar O Swanson Lindsay C LC Sahin Mustafa M Rayaprolu Sruti S Kumar Prateek P Rangaraju Srikant S Bird Adrian A Tarquinio Daniel D Carpenter Randall R Cobb Stuart S Faundez Victor V

iScience 20220817 9

MECP2 loss-of-function mutations cause Rett syndrome, a neurodevelopmental disorder resulting from a disrupted brain transcriptome. How these transcriptional defects are decoded into a disease proteome remains unknown. We studied the proteome of Rett cerebrospinal fluid (CSF) to identify consensus Rett proteome and ontologies shared across three species. Rett CSF proteomes enriched proteins annotated to HDL lipoproteins, complement, mitochondria, citrate/pyruvate metabolism, synapse compartments ...[more]

PMID: 36060065

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TMT mass spectrometry analysis of wild type and Mecp2 null rat CSF of animals aged 23-26 days

Project description:TMT mass spectrometry analysis of wild type and Mecp2 null rat CSF of animals aged 23-26 days

2022-10-14 | PXD029808 | Pride

TMT mass spectrometry analysis of wild type and Cdkl5 null mouse CSF of animals aged 46 days

Project description:TMT mass spectrometry analysis of wild type and Cdkl5 null mouse CSF of animals aged 46 dayss

2022-10-14 | PXD029811 | Pride

Heterogeneous Expression of Nuclear Encoded Mitochondrial Genes Distinguishes Inhibitory and Excitatory Neurons.

Project description:Mitochondrial composition varies by organ and their constituent cell types. This mitochondrial diversity likely determines variations in mitochondrial function. However, the heterogeneity of mitochondria in the brain remains underexplored despite the large diversity of cell types in neuronal tissue. Here, we used molecular systems biology tools to address whether mitochondrial composition varies by brain region and neuronal cell type. We reasoned that proteomics and transcriptomics of microdissected brain regions combined with analysis of single cell mRNA sequencing could reveal the extent of mitochondrial compositional diversity. We selected nuclear encoded gene products forming complexes of fixed stoichiometry, such as the respiratory chain complexes and the mitochondrial ribosome, as well as molecules likely to perform their function as monomers, such as the family of SLC25 transporters. We found that only the proteome encompassing these nuclear-encoded mitochondrial genes and obtained from microdissected brain tissue segregated the hippocampus, striatum, and cortex from each other. Nuclear-encoded mitochondrial transcripts could only segregate cell types and brain regions when the analysis was performed at the single cell level. In fact, single cell mitochondrial transcriptomes were able to distinguish glutamatergic and distinct types of GABAergic neurons from one another. Within these cell categories, unique SLC25A transporters were able to identify distinct cell subpopulations. Our results demonstrate heterogeneous mitochondrial composition across brain regions and cell types. We postulate that mitochondrial heterogeneity influences regional and cell type specific mechanisms in health and disease.

2022-02-17 | PXD026104 | Pride

SORL1 regulates APOE and CLU levels in human neurons

Project description:SORL1 is implicated in the pathogenesis of Alzheimer’s disease (AD) through genetic studies. To interrogate the role(s) of SORL1 in human brain cells, SORL1 null iPSCs are differentiated to neuron, astrocyte, microglial, and endothelial cell fates. Loss of SORL1 leads to alterations in both overlapping and distinct pathways across cell types, with the greatest effects in neurons and astrocytes. SORL1 loss induces a neuron-specific reduction in APOE and CLU and altered lipid profiles. Enhancement of retromer-mediated trafficking rescues tau phenotypes observed in SORL1 null neurons but does not rescue APOE levels. Pathway analyses implicate TGF-β/SMAD signaling in SORL1 function, and modulating SMAD signaling in neurons alters APOE RNA levels in a SORL1-dependent manner. Analyses of iPSCs derived from a large cohort reveal a neuron-specific association between SORL1, APOE, and CLU levels, a finding validated in post-mortem brain. These studies provide a mechanistic link between strong genetic risk factors for AD.

2023-10-24 | PXD044093 | Pride

INPP5D regulates inflammasome activation in human microglia

Project description:Microglia and neuroinflammation play an important role in the development and progression of Alzheimer’s disease (AD). Inositol polyphosphate-5-phosphatase D (INPP5D) is a myeloid-expressed gene genetically-associated with AD. Through unbiased analyses of RNA and protein profiles in INPP5D-disrupted iPSC-derived human microglia, we find that reduction in INPP5D activity is associated with molecular profiles consistent with disrupted autophagy and inflammasome activation. These findings are validated through targeted pharmacological experiments which demonstrate that reduced INPP5D activity induces the formation of the NLRP3 inflammasome, cleavage of CASP1, and secretion of IL-1 and IL-18. Further, in-depth analyses of human brain tissue across hundreds of individuals using a multi-analytic approach provides evidence that a reduction in function of INPP5D in microglia results in inflammasome activation in AD. These findings provide insights into the molecular mechanisms underlying microglia-mediated processes in AD and highlight the inflammasome as a potential therapeutic target for modulating INPP5D-mediated vulnerability to AD.

2024-01-26 | PXD046040 | Pride

MeCP2 and H3K27me3 binding in Mecp2-knockout and MECP2-transgenic hippocampus

Project description:MeCP2 globally regulates gene expression in the brain. One example is Growth-differentiation factor 11 (Gdf11), which is down-regulated upon loss of MeCP2 and up-regulated upon gain of MeCP2. To assess if MeCP2 binds near the Gdf11 locus we performed CUT&RUN for MeCP2 in Mecp2-knockout or MECP2-transgenic hippocampus. To assess if a repressive histone modification (H3K27me3) was concordantly changed we profiled H3k27me3 in these same matched tissues.

2023-02-23 | GSE213752 | GEO

MeCP2-R270X and MeCP2-G273X ChIP-Seq

Project description:MECP2-R270X transgenic mice (TG) and MECP2-G273X TG mice were generated in the Zoghbi Lab. These mice express the respective truncated form of MeCP2 tagged with GFP at the C-terminus from a transgenic human PAC containing all known regulatory sequences. These transgenes were maintained on a wild-type pure FVB background. For experiments each transgenic line was crossed by Mecp2 null mice (Mecp2 tm1.1Bird) on a pure 129SvEv background and the resulting male F1 hybrid progeny (FVB;129SvEv) that lacked endogenous MeCP2 expression but expressed either transgene (Mecp2 -/y; MECP2-R270X TG or Mecp2-/y; MECP2-G273X TG) were used for ChIP-Seq analysis. Whole brain from either the R270X mice (Mecp2 -/y; MECP2-R270X TG) or the G273X mice (Mecp2 -/y; MECP2-G273X TG) was formaldehyde crosslinked and purified chromatin was immunoprecipitated with anti-GFP antibody (Abcam ab6556).

2013-03-12 | GSE36536 | GEO

MeCP2-R270X and MeCP2-G273X ChIP-Seq

2013-03-12 | E-GEOD-36536 | biostudies-arrayexpress

MeCP2 and H3K27me3 binding in Mecp2-knockout and MECP2-transgenic hippocampus

Project description:MeCP2 and H3K27me3 binding in Mecp2-knockout and MECP2-transgenic hippocampus

| PRJNA882406 | ENA

Cerebellar gene expression data from Mecp2-null and MECP2-transgenic mice

Project description:We compared gene expression changes in the cerebellum of mice lacking MeCP2 (Mecp2-null) and mice overexpressing MeCP2 (MECP2-transgenic). A group of postnatal neurodevelopmental disorders collectively referred to as MeCP2 disorders are caused by aberrations in the gene encoding methyl-CpG-binding protein 2 (MECP2). Loss of MeCP2 function causes Rett syndrome (RTT), whereas increased copy number of the gene causes MECP2 duplication or triplication syndromes. MeCP2 acts as a transcriptional repressor, however the gene expression changes observed in the hypothalamus of MeCP2 disorder mouse models suggest that MeCP2 can also upregulate gene expression. To determine if this dual role of MeCP2 extends beyond the hypothalamus, we studied gene expression patterns in the cerebellum of Mecp2-null and MECP2-Tg mice, modeling RTT and MECP2 duplication syndrome, respectively. We found that abnormal MeCP2 dosage causes alterations in the expression of hundreds of genes in the cerebellum. The majority of genes were upregulated in MECP2-Tg mice and downregulated in Mecp2-null mice, consistent with a role for MeCP2 as a modulator that can both increase and decrease gene expression. Interestingly, many of the genes altered in the cerebellum, particularly those increased by the presence of MeCP2 and decreased in its absence, were similarly altered in the hypothalamus. Keywords: Comparison of cerebellar gene expression data between Mecp2-null mice and Mecp2-transgenic mice

2009-04-07 | GSE15574 | GEO

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