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Tissue disaggregation and isolation of specific cell types from transgenic Xenopus appendages for transcriptional analysis by FACS

ABSTRACT: Tissue disaggregation and isolation of specific cell types from transgenic Xenopus appendages for transcriptional analysis by FACS

PROVIDER: PRJNA664919 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12691427_1.fastq.gz	Fastqsanger.gz
	SRR12691427_2.fastq.gz	Fastqsanger.gz
	SRR12691428_1.fastq.gz	Fastqsanger.gz
	SRR12691428_2.fastq.gz	Fastqsanger.gz

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Tissue disaggregation and isolation of specific cell types from transgenic Xenopus appendages for transcriptional analysis by FACS

Project description:Xenopus embryos and tadpoles are versatile models for embryological, cell biological, and regenerative studies. Genomic and transcriptomic approaches have been increasingly employed in these frogs. Most of these genome-wide analyses have profiled tissues in bulk, but there are many scenarios where isolation of single cells may be advantageous, including isolation of a preferred cell type, or generation of a single-cell suspension for applications such as scRNA-Seq. Here we present a protocol for the disaggregation of complex tail and limb bud tissue, and use cell type-specific fluorescence in transgenic X. tropicalis appendages to isolate specific cell populations using fluorescence activated cell sorting (FACS). Our protocol addresses a specific challenge in Xenopus embryos and tadpoles: the storage of maternal yolk platelets in each cell, which can introduce light scatter and thereby false positives into FACS analysis. Here we gate against both non-transgenic and ubiquitously transgenic animals to reduce both false positives and false negatives. We use the Xtr.Tg(pax6:GFP;cryga:RFP;actc1:RFP)Papal transgenic line as a test case to demonstrate that nucleic acid preparations made from sorted cells are high quality and specific. We anticipate this method will be adaptable to study various cell types that have transgenic reporter lines to better profile cell types of interest.

2020-09-23 | GSE158331 | GEO

Tissue disaggregation and isolation of specific cell types from transgenic Xenopus appendages for transcriptional analysis by FACS.

Project description:BackgroundXenopus embryos and tadpoles are versatile models for embryological, cell biological, and regenerative studies. Genomic and transcriptomic approaches have been increasingly employed in these frogs. Most of these genome-wide analyses have profiled tissues in bulk, but there are many scenarios where isolation of single cells may be advantageous, including isolation of a preferred cell type, or generation of a single-cell suspension for applications such as scRNA-Seq.ResultsHere we present a protocol for the disaggregation of complex tail and limb bud tissue, and use cell type-specific fluorescence in transgenic X. tropicalis appendages to isolate specific cell populations using fluorescence activated cell sorting (FACS). Our protocol addresses a specific challenge in Xenopus embryos and tadpoles: the storage of maternal yolk platelets in each cell, which can introduce light scatter and thereby false positives into FACS analysis.ConclusionsHere we gate against both nontransgenic and ubiquitously transgenic animals to reduce both false positives and false negatives. We use the Xtr.Tg(pax6:GFP;cryga:RFP;actc1:RFP)Papal transgenic line as a test case to demonstrate that nucleic acid preparations made from sorted cells are high quality and specific. We anticipate this method will be adaptable to study various cell types that have transgenic reporter lines to better profile cell types of interest.

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Gene expression profiles of E11.5 metanephric mesenchyme and Adult Juxtaglomerular Complex cells or renal cortex from the kidneys of Crym-GFP or Ren1c-YFP transgenic mice using FACS or single-cell isolation techniques (GUDMAP Series ID:47).

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Project description:Affymetrix miRNA arrays were used to generate miRNA profiles of peripheral blood leukocytes and FACS sorted neutrophils, monocytes, B-cells, T-cells, CD4+ T-cells, and CD8+ T-cells, being the major leukocyte cell types in human. The study allowed for the determination of the miRNAs that were expressed in each leukocyte cell subtype. Two-way hierarchical clustering on the miRNAs and samples illustrated that miRNA expression profiles of B- and T-cells were very much alike, and that there there were a number of miRNAs which appeared to have an expression profile specific to certain leukocyte cell subtypes. This study will facilitate the identification of microRNAs associated with and contributing to single leukocyte cell subtypes. Peripheral blood leukocytes were extracted, and neutrophils, monocytes, B-cells, T-cells, CD4+ T-cells, and CD8+ T-cells were FACS sorted from total blood from a healthy subject. In order to determine the miRNA expression profile of these cells, RNA was extracted, labeled and hybridized on an Affymetrix miRNA array.

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Bulk RNA-sequencing of cell types isolated by FACS from normal human prostates

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Comparison of regenerating and non regenerating transgenic stage 52 Xenopus hind limbs

Project description:Epimorphic regeneration is the process by which complete regeneration of a complex structure such as a limb occurs through production of a proliferating blastema. This type of regeneration is rare among vertebrates but does occur in the African clawed frog Xenopus laevis, traditionally a model organism for the study of early development. Xenopus tadpoles can regenerate tails, limb buds and the lens of the eye, although the ability of the latter two organs to regenerate diminishes with advancing developmental stage. Using a heat shock inducible transgene that remains silent unless activated, we have established a stable line of transgenic Xenopus in which the BMP inhibitor Noggin can be over-expressed at any time during development. We have previously shown that activation of this transgene blocks regeneration of the tail and limb of Xenopus tadpoles. In the current study, we have taken advantage of this transgenic line to directly compare gene expression in same stage regenerating vs. non-regenerating hind limb buds. Using Affymetrix gene chip analysis, we have identified genes whose expression levels are linked to regenerative success. These include the BMP inhibitor Gremlin and the stress protein Hsp60 (no blastema in zebrafish). Analysis of overrepresented Gene Ontology functional groupings suggests that successful regeneration in the Xenopus hind limb depends on induction of stress response pathways. Furthermore, as expected, genes involved in embryonic development and growth are also significantly over-represented in regenerating early hind limb buds. Keywords: Differential expression, regeneration

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