Comparative analysis of transcriptome profiles reveals stage- and TR-dependent gene regulation programs underlying the initiation of tail regeneration in Xenopus tropicalis
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ABSTRACT:
ORGANISM(S): Xenopus tropicalis
PROVIDER: GSE225045 | GEO | 2024/12/17
REPOSITORIES: GEO
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Project description:In this experiment, we show transcription profiling of the Xenopus tropicalis tadpole tail tissue regeneration following removal. The tail tissues include its spinal cord, notochord, muscle, and dorsal aorta. We characterized the early, intermediate, and late stages of Xenopus tropicalis tail regeneration using the Xenopus tropicalis Affymetrix genome array in biological replicate.
2010-10-01 | E-MEXP-2420 | biostudies-arrayexpress
Project description:In contrast to humans, many amphibians are able to rapidly and completely regenerate complex tissues, including complete appendages. Following tail amputation, Xenopus tropicalis tadpoles quickly regenerate muscle, spinal cord, cartilage, vasculature and skin, all properly patterned in three dimensions. To better understand the molecular basis of this regenerative competence, we performed a transcriptional analysis of regeneration using RNA-Seq. We profiled the transcriptome at 6 timepoints during tail regeneration, and used clustering analysis to identify biological processes that are prioritized during different transitions in the regeneration process. Our work expands significantly on previous expression analyses of tail regeneration. We are able to refine the windows during which many key biological signaling processes act, including embryonic patterning signals, immune responses, bioelectrical signaling and apoptosis. By including multiple timepoints within the first 24 hours post-amputation, we have also identified new processes that are highly prioritized early in regeneration, including axonogenesis, chemotaxis, and RNA metabolism. Our work provides a deep database for researchers interested in appendage regeneration, and highlights new avenues for further study.
2017-01-30 | GSE88975 | GEO
Project description:Premetamorphic Xenopus laevis tadpole tail respond to thyroid hormone by resorption. The goal of this experiment is to identify the genes involved in the TH-induced resorption tadpole tail and compare it to TH-induced proliferation and differentiation program in tadpole limb and brain. Xenopus tadpoles (NF54) were treated with 100 nM T3 in 0.1 x MMR for another 24h and 48h or without T3 for 48h (control group). NF 61 tadpoles were in 0.1 X MMR till they reached NF stage 62. The tails were dissected after the experiment. Keywords: development or differentiation design,organism part comparison design,reference design,replicate design,time series design
2005-10-04 | GSE3405 | GEO
Project description:Mammals possess limited regeneration capabilities, where the few examples of scarless healing tend to be restricted to early development. In light of this, it is of great interest to study animals that can faithfully regrow complete appendages, and uncover the biological properties that facilitate this process. Xenopus tropicalis tadpoles are excellent vertebrate models of regeneration, as they rapidly recover lost tails within just one week post amputation. Though we have some understanding of what pathways are required for tail regeneration, we have yet to systematically chronicle the regulatory events that coordinate this specialized response to injury. Here, we highlight a striking phenomenon in Xenopus regeneration, whereby nuclei within the fin epithelium of an amputated tail change shape in a dramatic and stereotyped manner during regeneration. We assess chromatin accessibility dynamics through ATAC-Seq of nine time points of regeneration, and find that large scale changes in chromatin state are highly correlated to changes in nuclear shape. To identify critical regulators of these chromatin dynamics, we describe and apply a machine learning method, PFBoost, which integrates information from motifs underlying dynamically accessible ATAC-Seq peaks and differentially expressed transcription factors from time-matched RNA-Seq data to predict chromatin state. To functionally evaluate PFBoost-predicted regeneration regulators, we developed an inducible CRISPRi system utilizing the FKBP derived destabilizing domain, and knockdown expression of these regulators during the early hours of regeneration. With this methodology, we identified and describe two novel regulators of regeneration, spib and chd8. We provide not only an abundant resource for chromatin dynamics in tail regeneration, but also chronicle an intriguing mechanism of regeneration regulation in the form of nuclear shape change and coordinate changes in chromatin state.
2020-01-31 | GSE138303 | GEO
Project description:ATAC-Seq of Xenopus tail regeneration
| PRJNA575367 | ENA
Project description:To identify changes in metabolites that correlate with progression of tail regeneration, we collected a timecourse of tissues containing 250 um of tissue anterior to the wound site as well as all regenerating tissue at 0, 3, and 24 hours post amputation. We also collected the posterior 500 um of the developing tail to represent the metabolic profile of uninjured tissues. Tissues from 25 individuals were collected and frozen in more than 5-8 minutes per replicate before processing as in the methods. 104 metabolites were identified in these samples and relative peak intensities were compared to identify changes in abundance corresponding to regeneration. 42 differentially abundant metabolites were found using MetaboAnalyst, the majority of which were increased 24 hours post amputation. Further investigation of these 24 hours post amputation enriched metabolites revealed that these metabolites were largely associated with increased growth and nucleotide metabolism. This finding is in line with the growth of new tissue seen at this timepoint and also suggests that generation of nucleotides are a major factor in sustaining this growth.
2022-08-03 | ST002271 | MetabolomicsWorkbench
Project description:Comparative analysis of transcriptome profiles reveals stage- and TR-dependent gene regulation programs underlying the initiation of tail regeneration in Xenopus tropicalis
| PRJNA933614 | ENA
Project description:Tissue regeneration is of fast growing importance in the development of biomedicine, particularly organ replacement therapies. Unfortunately, many human organs cannot regenerate. Anuran Xenopus laevis has been used as a model to study regeneration as many tadpole organs can regenerate. In particular, the tail, which consists of many axial and paraxial tissues, such as spinal cord, dorsal aorta and muscle, commonly present in vertebrates, can fully regenerate when amputated at late embryonic stages and most of the tadpole stages. Interestingly, between stage 45 when feeding begins to stage 47, the Xenopus laevis tail cannot regenerate after amputation. This period, termed "refractory period", has been known for about 20 years. The underlying molecular and genetic basis is unclear in part due to the difficult to carry out genetic studies in this pseudo-tetraploid species. Here we compared tail regeneration between Xenopus laevis and the highly related diploid anuran Xenopus tropicalis and found surprisingly that Xenopus tropicalis lacks the refractory period. Further molecular and genetic studies, more feasible in this diploid species, should reveal the basis for this evolutionary divergence in tail regeneration between two related species and facilitate the understanding how tissue regenerative capacity is controlled, thus with important implications for human regenerative medicine.
| S-EPMC8028753 | biostudies-literature
Project description:Xenopus laevis tadpoles differ in their regenerative potential according to their developmental stage. Here, we focus on tail regeneration following amputation. By comparing the regenerative response during the naturally occurring regeneration-competent and -incompetent stages, scRNAseq can reveal cell type changes that are required for successful regeneration.
2019-04-23 | E-MTAB-7716 | biostudies-arrayexpress