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Schmidtea mediterranea

ABSTRACT: The planarian TCF/LEF factor Smed-tcf1 is required for the regeneration of dorsal-lateral neuronal subtypes

PROVIDER: PRJNA397658 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR5917960.fastq.gz	Fastqsanger.gz
	SRR5917970.fastq.gz	Fastqsanger.gz
	SRR5917961.fastq.gz	Fastqsanger.gz
	SRR5917971.fastq.gz	Fastqsanger.gz
	SRR5917962.fastq.gz	Fastqsanger.gz

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Similar Datasets

The planarian TCF/LEF factor Smed-tcf1 is required for the regeneration of dorsal-lateral neuronal subtypes

Project description:The adult brain of the planarian Schmidtea mediterranea (a freshwater flatworm) is a dynamic structure with constant cell turnover as well as the ability to completely regenerate de novo. Despite this, function and pattern is achieved in a reproducible manner from individual to individual in terms of the correct spatial and temporal production of specific neuronal subtypes. Although several signalling molecules have been found to be key to scaling and cell turnover, the mechanisms by which specific neural subtypes are specified remain largely unknown. Here we performed a 6 day RNAseq time course on planarians that were regenerating either 0, 1, or 2 heads in order to identify novel regulators of brain regeneration. Focusing on transcription factors, we identified a TCF/LEF factor, Smed-tcf1, which was required to correctly pattern the dorsal-lateral cell types of the regenerating brain. The most severely affected neurons in Smed-tcf1(RNAi) animals were the dorsal GABAergic neurons, which failed to regenerate, leading to an inability of the animals to phototax away from light. Together, Smed-tcf1 is a critical regulator, required to pattern the dorsal-lateral region of the regenerating planarian brain.

2017-10-01 | GSE102399 | GEO

Schmidtea mediterranea

Project description:Smed-hippo(RNAi) RNA-Seq

| PRJNA376157 | ENA

Tnfaip2/Exoc3 driven lipid metabolism is essential for stem cell differentiation & organ homeostasis [Schmidtea mediterranea]

Project description:Lipid metabolism is recognized as a key process for stem cell maintenance and differentiation but genetic factors that instruct stem cell function by influencing lipid metabolism remain to be delineated. Here we identify Tnfaip2 as an inhibitor of reprogramming of mouse fibroblasts into induced pluripotent stem cells. Tnfaip2 knockout embryonic stem cells (ESCs) exhibit differentiation failure and knockdown of the planarian orthologue, Smed-exoc3, abrogates in vivo differentiation of somatic stem cells, tissue homeostasis, and regeneration. Tnfaip2 deficient ESCs fail to induce synthesis of cellular triacylglycerol (TAG) and lipid droplets (LD) coinciding with reduced expression of Vimentin (Vim) – a known inducer of LD formation. Knockdown of Vim and Tnfaip2 act epistatically in enhancing cellular reprogramming of mouse fibroblasts. Similarly, planarians devoid of Smed-exoc3 displayed acute loss of TAGs. Supplementation of palmitic acid (PA) and palmitoyl-L-carnitine (a mitochondrial carrier of PA) restores the differentiation capacity of Tnfaip2 deficient ESCs as well as stem cell differentiation and organ maintenance in Smed-exoc3-depleted planarians. Together, these results identify a novel pathway, which is essential for stem cell differentiation and organ maintenance by instructing lipid metabolism.

2020-11-16 | GSE134300 | GEO

RNA Seq analysis of neoblasts from Schmidtea mediterranea treated with RNAi against zfp1, p53, or unc22 to identify factors involved in neoblast differentiation.

Project description:Epidermis is essential for animal survival, providing both a protective barrier and cellular sensor to the external environment. Interestingly, the epidermes of different species show broad morphological and functional diversity yet it is unclear whether this diversity came from modification of an existing gene regulatory network or de novo innovation of new genes. Here we identify the transcriptional regulators underlying the differentiation program of planarian epidermal lineage. We classify Smed-p53 as the most upstream molecule in this transcriptional cascade, suggesting a potentially conserved role for this gene in epidermal differentiation similar to TP63 in vertebrates. Moreover, we find that homologs of Sox and Pax family transcription factors, Smed-soxP-3 and Smed-pax-5, act cooperatively to activate the expression of epidermal markers. Together, these data show that planarian epidermal differentiation is regulated by a combination of conserved elements (p53/p63), recruitment of a non-conventional transcription module (soxP-3/pax-5), and novel genes (prog); they also suggest that specialized adpatations, such as epidermal mucus-secretion, arise from complex changes to gene networks. This experiment aims to identify regulators involved in epidermal differentiation at the neoblast stage by using RNA Seq to examine transcriptional changes in neoblasts (X1 population) isolated from animals treated with zfp-1 or p53 dsRNA.

2016-09-01 | GSE80544 | GEO

Schmidtea mediterranea

Project description:Planarian stem cell transcriptome

| PRJNA167022 | ENA

Schmidtea mediterranea

Project description:neuroendocrine control of planarian regeneration

| PRJNA866846 | ENA

The head-regeneration transcriptome of the planarian Schmidtea mediterranea

Project description:The head-regeneration transcriptome of the planarian Schmidtea mediterranea

2011-07-15 | E-MTAB-607 | biostudies-arrayexpress

Schmidtea mediterranea breed:asexual

Project description:transcriptome of Smed-LPT RNAi

| PRJNA338115 | ENA

Schmidtea mediterranea

Project description:Transcriptional profiling of Schmidtea mediterranea planarians (smed-runt-1 RNAi vs. control RNAi)

| PRJNA157041 | ENA

Transcriptional profiling of laser captured intestinal tissue from the planarian Schmidtea mediterranea

Project description:Proper function and repair of the digestive system are vital to most animals. Deciphering the mechanisms involved in these processes requires an atlas of gene expression and cell types. Here, we applied laser-capture microdissection (LCM) and RNA-seq to characterize the intestinal transcriptome of Schmidtea mediterranea, a planarian flatworm that can regenerate all organs, including the gut. We identified hundreds of genes with intestinal expression undetected by previous approaches. Systematic analyses revealed extensive conservation of digestive physiology and cell types with other animals, including humans. Furthermore, spatial LCM enabled us to uncover previously unappreciated regionalization of gene expression in the planarian intestine along the medio-lateral axis, especially among intestinal goblet cells. Finally, we identified two intestine-enriched transcription factors that specifically regulate regeneration (hedgehog signaling effector gli-1) or maintenance (RREB2) of goblet cells. Altogether, this work provides resources for further investigation of mechanisms involved in gastrointestinal function, repair and regeneration.

2020-03-20 | GSE135351 | GEO

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