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ACME dissociation: a versatile cell fixation-dissociation method for single-cell transcriptomics

ABSTRACT: We performed single-cell transcriptome analysis (using 10x genomics 3' scRNA-seq v3.1 chemistry) in the sea anemone Nematostella vectensis (Cnidaria).

ORGANISM(S): Nematostella vectensis

PROVIDER: GSE166977 | GEO | 2021/04/01

REPOSITORIES: GEO

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Post transcriptional modifications of miRNAs in the cnidarian Nematostella vectensis

Project description:MicroRNAs of bilaterian animals undergo posttranscriptional modifications such as methylation, tailing and trimming that regulate miRNA stability and function. To gain insight on the evolution of miRNA posttranscriptional modification, we studied regulation of miRNA stability by methylation in the sea anemone Nematostella vectensis, a representative of Cnidaria, the sister group of Bilateria.

2017-08-15 | GSE94526 | GEO

Decoupling behavioral and transcriptional responses to color in an eyeless cnidarian

Project description:We utilized the eyeless sea anemone, Nematostella vectensis, to quantify gene expression differences between different colors of light (red, green, blue) and in constant darkness through comparisons of 96 transcriptomes

2019-06-12 | GSE132526 | GEO

RNA-seq of NvNcol3::mOrange2 positive and NvNcol3::mOrange2 negative cells from Nematostella vectensis

Project description:NvNcol3::mOrange2 is a stable transgenic line that labels cnidocytes(stinging cells) of the sea anemone Nematostella vectensis (Nakanishi et al., Development 2012). Two week old primary polyps were dissociated and the NvNcol3::mOrange2 positive and negative cells were enriched by FACS.

2021-07-01 | E-MTAB-9556 | biostudies-arrayexpress

RNA-seq of NvElav1::mOrange positive and NvElav1::mOrange negative cells from Nematostella vectensis

Project description:NvElav1::mOrange is a stable transgenic line that labels a large fraction of the nervous system of the sea anemone Nematostella vectensis (Nakanishi et al., Development 2012). Two week old primary polyps were dissociated and the NvElav1::mOrange positive cells were enriched by FACS.

2020-02-28 | E-MTAB-8794 | biostudies-arrayexpress

The chromatin-regulating CoREST complex is animal specific and essential for development in the cnidarian Nematostella vectensis

Project description:Using the sea anemone Nematostella vectensis as a model for early branching metazoans, we show that CoREST is an animal-specific protein that assembles a conserved histone-modifying complex including Lsd1 and HDAC1/2. We further show that the Nematostella complex is similar in composition to vertebrates.

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MAPK signaling promotes embryonic neural induction and expression of embryonic patterning genes in Nematostella vectensis

Project description:While FGF mediated MEK/ERK signaling is required for apical tuft formation and metamorphosis in the sea anemone Nematostella vectensis (Rentzsch et al, 2008), nothing is known about the role of MEK/ERK signaling in inducing germ layers and cell types during early developmental stages. We therefore performed a genome wide expression array on UO126 (MEK inhibitor) treated blastula stages compared to DMSO treated control embryos and identified genes potentially involved in neurogenesis, germ layer specification and axial patterning.We performed transcriptional profiling of Nematostella vectensis blastula stages (24 hours post fertilisation @ 17C) using a custom made whole genome array (4x72K - A-MEXP-2380). DMSO treated wild-type embryos were compared to U0126 (MEK Inhibitor) treated embryos at the blastula stage.

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Project description:The aim of this part of the wider project is to identify neuropeptide precursors, investigate cleavage sites on neuropeptide precursors and predict mature peptides in the sea anemone Nematostella vectensis. This was done to create a synthetic library of N. vectensis neuropeptides which were then used to test neuropeptide receptor candidates for activation by the different peptides.

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Global temporal gene expression of Nematostella vectensis in-situ

Project description:We assessed genome-wide temporal transcript expression patterns in the sea anemone, Nematostella vectensis, in Great Sippewissett Marsh in Massachusetts, where anemones experienced a natural light cycle with intensity varying from 0-200 lum/ft2, daily temperature fluctuations of ~9C. We measured ‘in situ’ gene expression from recaptured anemones every hour from 0800 to 1700 and identified six time-dependent gene clusters, represented by several genes involved in metabolism, stress, and transcription-translation related functions.

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Spatial transcriptomics reveals a conserved segment polarity program that governs muscle patterning in Nematostella vectensis

Project description:During early animal evolution, the emergence of axially-polarized segments was central to the diversification of complex bilaterian body plans. Nevertheless, precisely how and when segment polarity pathways arose remains obscure. Here we demonstrate the molecular basis for segment polarization in developing larvae of the pre-bilaterian sea anemone Nematostella vectensis. Utilizing spatial transcriptomics, we first constructed a 3-D gene expression atlas of developing larval segments. Capitalizing on accurate in silico predictions, we identified Lbx and Uncx, conserved homeodomain-containing genes that occupy opposing subsegmental domains under the control of both BMP signaling and the Hox-Gbx cascade. Functionally, Lbx mutagenesis eliminated all molecular evidence of segment polarization at larval stage and resulted in an aberrant mirror-symmetric pattern of retractor muscles in primary polyps. These results demonstrate the molecular basis for segment polarity in a pre-bilaterian animal, suggesting that polarized metameric structures were present in the Cnidaria-Bilateria common ancestor over 600 million years ago.

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Geographical temperature stress in the sea anemone Nematostella vectensis

Project description:Geographical temperature stress in the sea anemone Nematostella vectensis

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