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Unknown,Transcriptomics,Genomics,Proteomics

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Allelic dilution series series of C57BL6/J:CAST/EiJ RNA using Smart-seq3

ABSTRACT: Technical control for allelic detection using Smart-seq3. Liver RNA from pure C57BL6/J and CAST/EiJ strains was combined at varying ratios (0:1, 1:7, 1:3, 3:5, 1:1, 5:3, 3:1, 7:1, 1:0) for a total of 200 pg RNA per sample.

INSTRUMENT(S): NextSeq 550

ORGANISM(S): Mus musculus

SUBMITTER: Antonio Lentini

PROVIDER: E-MTAB-10709 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Elastic dosage compensation by X-chromosome upregulation.

Lentini Antonio A Cheng Huaitao H Noble J C JC Papanicolaou Natali N Coucoravas Christos C Andrews Nathanael N Deng Qiaolin Q Enge Martin M Reinius Björn B

Nature communications 20220406 1

X-chromosome inactivation and X-upregulation are the fundamental modes of chromosome-wide gene regulation that collectively achieve dosage compensation in mammals, but the regulatory link between the two remains elusive and the X-upregulation dynamics are unknown. Here, we use allele-resolved single-cell RNA-seq combined with chromatin accessibility profiling and finely dissect their separate effects on RNA levels during mouse development. Surprisingly, we uncover that X-upregulation elastically ...[more]

PMID: 35388014

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Multi-modal single-cell sequencing of differentiating mESCs using Smart-seq3 and scATAC-seq

Project description:We report dynamics of X-chromosome upregulation (XCU) along X-chromosome inactivation (XCI) in mESCs as they differentiate into EpiSCs. F1 hybrid C57BL6/J × CAST/EiJ male and female mESCs were grown in serum/LIF conditions were differentiated using Fgf2 and Activin A for 1, 2, 4 and 7 days to induce random XCI in female cells. Multi-modal single-cell sequencing was performed using scATAC on nuclei and Smart-seq3 to assay chromatin accessibility and poly-A+ RNA expression, respectively. Allelic resolution is achieved using strain-specific SNPs in the data. We reveal dynamic balancing of X alleles as cells undergo XCI to compensate dosage imbalances between sexes as well as between X and autosomes. Furthermore, we reveal that female naïve mESCs with two active X chromosomes lack XCU on both alleles which has major implications for reprogramming studies. Finally, we estimate allelic transcriptional burst kinetics from the data and find that progressively increased burst frequencies underlies the XCU process.

2022-02-14 | E-MTAB-10714 | biostudies-arrayexpress

Single-cell RNA sequencing of differentiating mESCs using Smart-seq3

Project description:We report dynamics of X-chromosome upregulation (XCU) along X-chromosome inactivation (XCI) in mESCs as they differentiate into EpiSCs. F1 hybrid C57BL6/J × CAST/EiJ male and female mESCs were adapted to 2i/LIF and female cells grown in serum/LIF conditions were differentiated using Fgf2 and Activin A for 1, 2, 4 and 7 days to induce random XCI. scRNA-seq was performed using the Smart-seq3 protocol, providing full-length coverage together with molecular counting using UMIs. Allelic resolution is achieved using strain-specific SNPs in the data. We reveal dynamic balancing of X alleles as cells undergo XCI to compensate dosage imbalances between sexes as well as between X and autosomes. Furthermore, we reveal that female naïve mESCs with two active X chromosomes lack XCU on both alleles which has major implications for reprogramming studies. Finally, we estimate allelic transcriptional burst kinetics from the data and find that progressively increased burst frequencies underlies the XCU process.

2022-02-14 | E-MTAB-9324 | biostudies-arrayexpress

Transposable element expression at unique loci in single cells with CELLO-seq

Project description:We introduce a novel method (CELLO-seq) for long-read RNA sequencing at single cell resolution. CELLO-seq allows for full-length RNA sequencing and enables measurement of allelic, isoform and Transposable Element (TE) expression at unique loci. We use CELLO-seq to assess the widespread expression of TEs in 2-cell mouse blastomeres as well as human induced pluripotent stem cells (hiPSCs). Across both species, old and young TEs showed evidence of locus-specific expression, with simulations demonstrating that only a small number of very young elements in the mouse could not be mapped back to with high confidence. Exploring the relationship between the expression of individual elements and putative regulators revealed surprising heterogeneity, with TEs within a class showing different patterns of correlation, suggesting distinct regulatory mechanisms. CELLO-seq thus represents a significant advance in the research of TEs, highlighting that studying TEs in single cells and at single loci resolution is necessary for understanding how such elements are regulated and for gaining insight into their role during development.

2020-10-01 | E-MTAB-9577 | biostudies-arrayexpress

Functional genomics of cattle through integration of multi-omics data - ATAC-seq

Project description:Functional annotations of cattle genome

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Single cell RNA-seq of sorted epitope-specific autoreactive B cells from healthy donor buffy coats

Project description:The aim of the experiment is to identify candidate genes to phenotype epitope-specific autoreactive B cells. These genes could serve as markers to delineate further populations of autoreactive B cells that were shown to be key players in regulating autoimmunity and in explaining B cell selection.

2023-08-31 | E-MTAB-13291 | biostudies-arrayexpress

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2024-07-29 | E-MTAB-13873 | biostudies-arrayexpress

Multi-platform single cell transcriptomic profiling as a benchmarking resource

Project description:In this study, we perform comparative analysis of Illumina HiSeq and BGISEQ-500 sequencing platforms for single-cell transcriptomics data. We performed scRNA-seq on a homogenous population of mouse embryonic stem cells along with two kinds of control spike-in molecules and sequenced across both sequencing platforms. The matched Illumina platform datasets can be found with accession numbers (E-MTAB-5483, E-MTAB-5484, E-MTAB-5485). The additional data comparison performed in the study can be found (BioProject# PRJNA430491, SRA# SRP132313 and CNBG# CNP0000075).

2019-03-01 | E-MTAB-7239 | biostudies-arrayexpress

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2022-12-31 | E-MTAB-11208 | biostudies-arrayexpress

Bulk RNA sequencing of cycling and non-cycling NEUROG3-positive and negative human embryonic stem cell-derived pancreatic cells using a dual NEUROG3-reporter

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2022-12-31 | E-MTAB-11210 | biostudies-arrayexpress

CUT&RUN experiment at four time points in HEK293T and hESC cells, assessing the time-resolved response of β-catenin genomic occupancy upon Wnt signaling activation

Project description:Wnt/β-catenin signaling is a highly organized biochemical cascade that triggers a gene expression program in the signal-receiving cell. The Wnt/β-catenin-driven transcriptional response is involved in virtually all cellular processes during development, homeostasis, and its deregulation causes human disease. However, outstanding questions remain unanswered. A first question concerns cell-specificity: how this response is integrated into lineage-specific choices is still unknown. A second question concerns time: it is not known whether β-catenin associates with its targets simultaneously or in a time-dependent fashion. For instance, while TCF/LEF and other components of the Wnt transcriptional complex are constitutively associated with the chromatin, it is β-catenin arrival, upon Wnt induction, that launches target genes transcription. Therefore, discovering the dynamics of the genome-wide β-catenin binding pattern is required to unambiguously define the direct targets of Wnt signaling To address these questions, we realized a time-resolved atlas of β-catenin genome-wide occupancy in two human cell types, human embryonic kidney cells 293T (HEK293T) and human embryonic stem cells (hESCs). To this end, we treated HEK293T and hESCs with the GSK3 inhibitor/Wnt activator CHIR99021 (10 mM) for 3 days, and assessed β-catenin binding via CUT&RUN-LoV-U (Zambanini et al., 2022) 90 minutes, 4 hours, 24 hours and 3 days after the onset of the stimulation. This approach allowed us to establish that β-catenin repositions to different genomic loci along stimulation time, showing that a definition of Wnt target genes must take into account the time-dimension. Moreover, β-catenin physical targets are largely cell-type specific, as only a subset of them is present across the examined contexts.

2022-09-30 | E-MTAB-12077 | biostudies-arrayexpress

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