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Gene expression profiling for: activin-2 is required for regeneration of polarity on the planarian anterior-posterior axis

ABSTRACT: Gene expression profiling for: activin-2 is required for regeneration of polarity on the planarian anterior-posterior axis

PROVIDER: PRJNA624098 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11518700.fastq.gz	Fastqsanger.gz
	SRR11518701.fastq.gz	Fastqsanger.gz
	SRR11518702.fastq.gz	Fastqsanger.gz
	SRR11518703.fastq.gz	Fastqsanger.gz
	SRR11518704.fastq.gz	Fastqsanger.gz

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Gene expression profiling for: activin-2 is required for regeneration of polarity on the planarian anterior-posterior axis

Project description:The goal of this data set is to identify transcriptional changes in activin-2 RNAi animals vs control animals. We did bulk RNA sequencing of a wound induced time course to try to identify changes in the context of activin-2 RNAi, and targets of activin-2. These changes may help explain some of the phenotypic chnages seen in activin-2 RNAi animals.

2020-05-15 | GSE148376 | GEO

Deciphering m6A dynamics at single-base level during planarian anterior-posterior (AP) axis specification

Project description:Background: The establishment of the anterior-posterior (A-P) axis is a crucial step during tissue repair and regeneration. Despite the association reported recently of N6-methyladenosine (m6A) with regeneration, the mechanism underlying the regulation of m6A in A-P axis specification during regeneration remains unknown. Herein, we deciphered the m6A landscape at a single-base resolution at multiple time points during A-P axis regeneration and constructed the de novo transcriptome assembly of the Dugesia japonica planarian.

2023-09-28 | GSE216412 | GEO

activin-2 is required for regeneration of polarity on the planarian anterior-posterior axis.

Project description:Planarians are flatworms and can perform whole-body regeneration. This ability involves a mechanism to distinguish between anterior-facing wounds that require head regeneration and posterior-facing wounds that require tail regeneration. How this head-tail regeneration polarity decision is made is studied to identify principles underlying tissue-identity specification in regeneration. We report that inhibition of activin-2, which encodes an Activin-like signaling ligand, resulted in the regeneration of ectopic posterior-facing heads following amputation. During tissue turnover in uninjured planarians, positional information is constitutively expressed in muscle to maintain proper patterning. Positional information includes Wnts expressed in the posterior and Wnt antagonists expressed in the anterior. Upon amputation, several wound-induced genes promote re-establishment of positional information. The head-versus-tail regeneration decision involves preferential wound induction of the Wnt antagonist notum at anterior-facing over posterior-facing wounds. Asymmetric activation of notum represents the earliest known molecular distinction between head and tail regeneration, yet how it occurs is unknown. activin-2 RNAi animals displayed symmetric wound-induced activation of notum at anterior- and posterior-facing wounds, providing a molecular explanation for their ectopic posterior-head phenotype. activin-2 RNAi animals also displayed anterior-posterior (AP) axis splitting, with two heads appearing in anterior blastemas, and various combinations of heads and tails appearing in posterior blastemas. This was associated with ectopic nucleation of anterior poles, which are head-tip muscle cells that facilitate AP and medial-lateral (ML) pattern at posterior-facing wounds. These findings reveal a role for Activin signaling in determining the outcome of AP-axis-patterning events that are specific to regeneration.

| S-EPMC8057570 | biostudies-literature

Calcineurin Controls Proximodistal Blastema Polarity in Zebrafish Fin Regeneration

Project description:Planarian flatworms regenerate their heads and tails from anterior or posterior wounds and this blastema regeneration polarity is controlled by Wnt/β-catenin signaling. It is well known that a regeneration blastema of appendages of vertebrates such as fish and amphibians grows distally. However, it remains unclear whether a regeneration blastema in vertebrate appendages can grow proximally. Here, we show that a regeneration blastema in zebrafish fins can grow proximally along the proximodistal axis by calcineurin inhibition. We used fin excavation in adult zebrafish to observe the unidirectional regeneration, from the anterior cut edge (ACE) to the posterior cut edge (PCE) of the cavity and this unidirectional regeneration polarity occurs as the PCE fails to build blastemas. Furthermore, we found that calcineurin activities in the ACE were greater than in the PCE. Calcineurin inhibition induced the PCE blastemas, and calcineurin hyperactivation suppressed fin regeneration. Collectively, these findings identify calcineurin as a molecular switch to specify the PCE blastema of the proximodistal axis and regeneration polarity in zebrafish fin.

2020-10-20 | GSE159560 | GEO

Mass Spectrometry analysis of human matched Anterior and Posterior lobes of Pituitary

Project description:This study provides a comprehensive proteomic analysis of five matched pairs of the anterior and posterior lobe of the pituitary, which was used to study the proteomic signature specific to both anterior and posterior lobes. Anterior Lobe n=5 Posterior Lobe n=5 A441 PT441 A442 PT442 A457 PT457 A459 PT459 A460 PT460

2022-12-07 | PXD030235 | Pride

Deciphering m6A dynamics at single-base level during planarian anterior-posterior (AP) axis specification

Project description:Deciphering m6A dynamics at single-base level during planarian anterior-posterior (AP) axis specification

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Vu2019 - Planarian double-head regeneration

Project description:This spatio-temporal model explores tissue polarity re-organization during planarian double-head formation upon regeneration with beta-catenin-1 RNAi treatment. Initial conditions for A and M polarity fields are chosen near the wild type pattern and the first 100 time steps are used to establish the typical wild type splay pattern. The induction of the ectopic head occurs at time-step 100 (interpreted as tail amputation time) at the position where the former tail was (right end), subsequently affects the nearby tissue with some lag and then re-polarizes the posterior half of the tissue from time-step 200 onward. Of these polarity fields, A represents the anterior-posterior polarization system provided by the core PCP pathway, M represents the medio-lateral polarization system provided by the Ft/Ds pathway and P represents the resulting superimposed and normalized polarization. P can be compared to the observable polarity data of ciliary rootlets. This simulation reproduces Figure 4D of the referenced paper. Parameter values correspond to the beta-catenin-1(RNAi) pattern as given in Table S2 of the referenced paper. The model file is in MorpheusML format and can be opened in the free, open-source multicellular modeling software Morpheus (https://morpheus.gitlab.io) to simulate the time course (movie) of the spatio-temporal dynamics.

2021-10-06 | MODEL2110050001 | BioModels

RNA sequencing of single cells from the midline posterior extremity in planarian Schmidtea mediterranea

Project description:RNA sequencing of single cells from the midline posterior tip of the tail and posterior blastema in planarian Schmidtea mediterranea identified new posterior-pole enriched genes

2019-05-25 | GSE121047 | GEO

Deciphering m6A dynamics at single-base level during planarian anterior-posterior (AP) axis specification [mRNA]

Project description:Deciphering m6A dynamics at single-base level during planarian anterior-posterior (AP) axis specification [mRNA]

| PRJNA893586 | ENA

Deciphering m6A dynamics at single-base level during planarian anterior-posterior (AP) axis specification [m6A]

Project description:Deciphering m6A dynamics at single-base level during planarian anterior-posterior (AP) axis specification [m6A]

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