Crustacean leg regeneration restores cell diversity
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA853193 | ENA |
REPOSITORIES: ENA
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Project description:Animals can regenerate complex organs, yet this frequently results in imprecise replicas of the original structure. In the crustacean Parhyale, we examine the fidelity of leg regeneration using cellular composition and cell molecular profiles. Single-nuclei sequencing shows that regenerated and uninjured legs are indistinguishable in terms of cell type composition and transcriptional profiles.
2022-06-30 | GSE206980 | GEO
Project description:Regenerating animals have the ability to reproduce body parts that were originally made in the embryo and subsequently lost due to injury. Understanding whether the process of regeneration mirrors development is an open question in most regenerative species. Here we take a transcriptomics approach to examine to what extent leg regeneration shows the same temporal patterns of gene expression as leg development in the embryo, in the crustacean Parhyale hawaiensis. We find that leg development in the embryo shows stereotypic temporal patterns of gene expression. In contrast, global patterns of gene expression during leg regeneration show a high degree of variation, related to the physiology of individual animals. A major driver of this variation is the molting cycle. After dissecting the transcriptional signals of individual physiology from regeneration, we obtain temporal signals that mark distinct phases of leg regeneration. Comparing the transcriptional dynamics of development and regeneration we find that, although both processes use largely the same genes, the temporal patterns in which these gene sets are deployed are different and cannot be systematically aligned.
2022-06-15 | GSE196485 | GEO
Project description:crustacean metagenome Raw sequence reads
| PRJNA533204 | ENA
Project description:crustacean metagenome Raw sequence reads
| PRJNA322089 | ENA
Project description:crustacean metagenome Raw sequence reads
| PRJNA330760 | ENA
Project description:Although axon regeneration can now be induced experimentally across anatomically complete spinal cord injury (SCI), restoring meaningful function after such injuries has been elusive. This failure contrasts with the spontaneous, naturally occuring repair that restores walking after severe but incomplete SCI. Here, we applied projection-specific and comparative single-nucleus RNA sequencing to uncover the transcriptional phenotype and connectome of neuronal subpopulations involved in natural spinal cord repair. We identified a molecularly defined population of excitatory projection neurons in the thoracic spinal cord that extend axons to the lumbar spinal cord where walking execution centers reside. We show that regrowing axons from these specific neurons across anatomically complete SCI and guiding them to reconnect with their appropriate target region in the lumbar spinal cord restores walking in mice. These results demonstrate that mechanism-based repair strategies that recapitulate the natural topology of molecularly defined neuronal subpopulations can restore neurological functions. Expanding this principle to different classes of neurons across the central nervous system may unlock the framework to achieve complete repair of the injured spinal cord.
2023-09-20 | GSE198949 | GEO
Project description:Leg muscle mdx and control: 7,14,23 day Keywords: other
2004-02-05 | GSE1018 | GEO