Dataset Information

Proteomics analysis of whole-cell, soma and neuronal projection fractions from day 35 iNeurons in Control and ASAH1-/-

ABSTRACT: This experiment describes the quantitative proteomic profiling of whole-cell, soma, and neuronal projection fractions from day 35 induced neurons (iN) derived from control and ASAH1 knockout human embryonic stem cells. Soma and projection compartments were physically separated using Transwell culture inserts, and triplicate biological replicates were processed using TMTpro 18-plex labeling and high-resolution Orbitrap mass spectrometry with FAIMS. Data were searched against the human proteome with stringent FDR control and reporter ion quantification, enabling compartment-resolved analysis of proteome alterations associated with ASAH1 deficiency.

INSTRUMENT(S):

ORGANISM(S): Homo Sapiens (human)

TISSUE(S): Stem Cell, Cell Culture

DISEASE(S): Lysosomal Storage Disease

SUBMITTER: Felix Kraus

LAB HEAD: J. Wade Harper

PROVIDER: PXD067229 | Pride | 2025-08-12

REPOSITORIES: Pride

ACCESS DATA

Dataset's files

Source:

Items per page:

1 - 5 of 37

Similar Datasets

Project description:Kabuki Syndrome (KS) is a multisystemic rare disorder, characterized by growth delay, distinctive facial features, intellectual disability, and rarely autism spectrum disorder. This condition is mostly caused by de novo mutations of KMT2D, encoding a catalytic subunit of the COMPASS complex involved in enhancer regulation. KMT2D catalyzes the deposition of histone-3-lysine-4 mono-methyl (H3K4Me1) that marks active and poised enhancers. To assess the impact of KMT2D mutations in the chromatin landscape of KS tissues, we have generated patient-derived induced pluripotent stem cells (iPSC), which we further differentiated into neural crest stem cells (NCSC), mesenchymal stem cells (MSC) and cortical neurons (iN). In addition, we further collected blood samples from 5 additional KS patients. To complete our disease modeling cohort we generated an isogenic KMT2D mutant line from human embryonic stem cells, which we differentiated into neural precursor and mature neurons. Micro-electrode-array (MEA)-based neural network analysis of KS iNs revealed an altered pattern of spontaneous network-bursts in a Kabuki-specific pattern. RNA-seq profiling was performed to relate this aberrant MEA pattern to transcriptional dysregulations, revealing that dysregulated genes were enriched for neuronal functions, such as ion channels, synapse activity, and electrophysiological activity. Here we show that KMT2D haploinsufficiency tends to heavily affect the transcriptome of cortical neurons and differentiated tissues while sparing multipotent states, suggesting that KMT2D has a most prevalent role in terminally differentiated cell and activate transcriptional circuitry unique to each cell type. Moreover, thorough profiling of H3K4Me1 unveiled the almost complete uncoupling between this chromatin mark and the regulatory effects of KMT2D on transcription, which is instead reflected by a defect of H3K27Ac. By integrating RNA-seq with ChIP-seq data we defined TEAD and REST as the master effectors of KMT2D haploinsufficiency. Also, we identified a subset of genes whose regulation is controlled by the balance between KMT2D and EZH2 dosage. Finally, we identified the bona fide direct targets of KMT2D in healthy and KS mature cortical neurons and TEAD2 as the main proxy of KMT2D dysregulation in KS. Overall, our study provides the transcriptional and epigenomic characterization of patient-derived tissues as well as iPSCs and differentiated disease-relevant cell types, as well as the identification of KMT2D direct target in cortical neurons, together with the identification of a neuronal phenotype of the spontaneous electrical activity.

			Action	DRS
	checksum.txt	Txt
	sa02866.mzIdentML	Mzid
	sa02866.mzXML	Mzxml
	sa02866.raw	Raw
	sa02867.mzIdentML	Mzid

Dataset Information

Proteomics analysis of whole-cell, soma and neuronal projection fractions from day 35 iNeurons in Control and ASAH1-/-

Dataset's files

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets