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Spatially-resolved chromatin accessibility profiling of the developing mouse embryo

ABSTRACT: We profiled the epigenetic landscape of the developing mouse embryo across three ages (E12.5, E13.5, and E15.5) using fresh frozen tissue sections processed with 10X Genomics's OMNI ATAC, which allows to record regions of open chromatin while retaining spatial resolution.

ORGANISM(S): Mus musculus

PROVIDER: GSE214986 | GEO | 2022/11/03

REPOSITORIES: GEO

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Spatial transcriptomics profiling of the developing mouse embryo

Project description:We profiled the gene expression landscape of the developing mouse embryo across three ages (E12.5, E13.5, and E15.5) using fresh frozed tissue sections processed with 10X Genomics's Visium platform.

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Chromatin accessibility profiling of the developing mouse embryo at the single nulceus level

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Chronological expression data from mouse skeletal muscle stem cells

Project description:Satellite cells are the primary source of stem cells for skeletal muscle growth and regeneration. Since adult stem cell maintenance involves a fine balance between intrinsic and extrinsic mechanisms, we performed genome-wide chronological expression profiling to identify the transcriptomic changes involved in acquisition of muscle stem cell characteristics. Muscle samples were isolated from the trunk during development, postnatally and in adult and aged Pax3GFP/+ mice. After digestion, GFP cells were purified via FACS and process for RNA extraction and hybridization on Affymetrix microarrays (Affymetrix Mouse Genome 430 2.0 Arrays). The different ages selected for sample isolation were E11.5-E12.5-E13.5-E14.5-E15.5-E17.5-P1-P12-1MO-2MO-18MO (E, Embryonic days; P, Postnatal days; MO, age in months), covering embryonic and fetal progenitors and proliferant, quiescent satellite cells. The eleven stages were done in triplicate for E11.5-E12.5-E14.5-E15.5-1MO-2MO-18MO, twice for E13.5, 4 times for P1-P12 and 5 times for E17.5, so 36 samples included in the microarray.

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A Time-resolved Multi-omic Atlas of the Developing Mouse Stomach

Project description:We collected 3 replicates of whole stomach organs at 15 time points that covered embryonic days (E12.5, E13.5, E14.5, E15.5, E16.5, E17.5, E18.5), postnatal days (D1, D3, D5), and postnatal weeks (W1, W2, W3, W6, W8). The sampling time window covered from the earliest day that stomach sampling is anatomically feasible to the latest weeks when stomachs are close to mature. We applied a fast-seq proteomics workflow, a label-free quantitative proteomics approach in combination with small scale reverse phase pre-fractionation strategy.

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The Comprehensive Mouse Retina Proteome

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Transcription factors Bcl11a and Bcl11b are Required for the production and differentiation of cortical projection neurons

Project description:Purpose:To assess changes in gene expression profiles of single cell from the wild type littermate controls cortices in E13.5, E15.5 and P0, and conditional knockout Bcl11a (and Bcl11b) at cortical projection neurons in the mouse cortices of the same ages. Methods: E13.5, E15.5 and P0 control and mutant cortices were carefully dissected under a clean environment. Then total RNA was isolated using an RNeasy Mini Kit (QIAGEN) according to the manufacturer’s protocol, quantified using NanoDrop ND-2000, and checked for RNA integrity using Agilent 2100 bioanalyzer. RNA-seq libraries were prepared according to the Illumina TruSeq protocol. Results: An average of 15 million reads per sample were obtained.

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Single cell RNA-seq developmental series in mouse hypothalamus in wild-type and Eed-cKO

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Spatially resolved transcriptomic profiling of degraded and challenging fresh frozen samples

Project description:Spatially resolved transcriptomics has enabled precise genome-wide mRNA expression profiling within tissue sections. The performance of unbiased SRT methods targeting the polyA tail of mRNA, relies on the availability of specimens with high RNA quality. Moreover, the high cost of currently available SRT assays requires a careful sample screening process to increase the chance of obtaining high-quality data. Indeed, the upfront analysis of RNA quality can show considerable variability due to sample handling, storage, and/or intrinsic factors. We present RNA-Rescue Spatial Transcriptomics (RRST), an SRT workflow designed to improve mRNA recovery from fresh frozen specimens with moderate to low RNA quality. First, we provide a benchmark of RRST against the standard Visium spatial gene expression protocol on high RNA quality samples represented by mouse brain and prostate cancer samples. Then, we demonstrate the RRST protocol on tissue sections collected from five challenging tissue types, including: human lung, colon, small intestine, pediatric brain tumor, and mouse bone/cartilage. In total, we analyzed 52 tissue sections and our results demonstrate that RRST is a versatile, powerful, and reproducible protocol for FF specimens of different qualities and origins.

2022-12-25 | GSE221571 | GEO

Whole transcriptome RNAseq analysis of somatic cells in Inhba fetal testes

Project description:We performed RNA-seq on testicular somatic cells from fetal activin A-deficient mice (Inhba KO) and wildtype littermates at embryonic ages E13.5 and E15.5. Activin A deficiency predominantly affects the Sertoli cell transcriptome. New candidate targets include Minar1, Sel1l3, Vnn1, Sfrp4, Masp1, Nell1, Tthy1 and Prss12. Importantly, the testosterone (T) biosynthetic enzymes present in fetal Sertoli cells, Hsd17b1 and Hsd17b3, were identified as activin-responsive. Activin-deficient testes contained elevated androstenedione (A4), displayed an Inhba gene dose-dependent A4/T ratio, and contained 11-keto androgens.

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