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Overlapping transcriptional programs promote survival and axonal regeneration of injured retinal ganglion cells

ABSTRACT: Overlapping transcriptional programs promote survival and axonal regeneration of injured retinal ganglion cells

PROVIDER: PRJNA834803 | ENA |

REPOSITORIES: ENA

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	SRR19065100_1.fastq.gz	Fastqsanger.gz
	SRR19065100_2.fastq.gz	Fastqsanger.gz
	SRR19065200_1.fastq.gz	Fastqsanger.gz
	SRR19065200_2.fastq.gz	Fastqsanger.gz

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Overlapping transcriptional programs promote survival and axonal regeneration of injured retinal ganglion cells [2]

Project description:Overlapping transcriptional programs promote survival and axonal regeneration of injured retinal ganglion cells [2]

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Overlapping transcriptional programs promote survival and axonal regeneration of injured retinal ganglion cells [1]

Project description:Overlapping transcriptional programs promote survival and axonal regeneration of injured retinal ganglion cells [1]

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Overlapping transcriptional programs promote survival and axonal regeneration of injured retinal ganglion cells [2]

Project description:Neurons of the central nervous system (CNS) display only a limited ability to survive and regenerate their axons after an injury. In mice, 85% of retinal ganglion cells (RGCs) die within 2 weeks of axotomy by optic nerve crush (ONC) and only few survivors regenerate axons. In the past years, a multitude of interventions have been identified to improve RGC survival and regeneration after an injury, however, each only protects a subset of neurons and stimulates axon regrowth in an even smaller set.. Here, we sought out to elucidate the molecular mechanisms underlying this selective responsiveness and investigated genes regulated by three well established survival and regeneration-promoting interventions – activation of the MTOR pathway via deletion of its inhibitor Pten, activation of the Jak/Stat-pathway by deletion of its endogenous inhibitor Socs3, and overexpression of the neurotrophic cytokine CNTF. Analysis of the transcriptomes from >125,000 single RGCs at various time points after ONC showed that while broad survival of all RGC types could be induced with each intervention, type-independent axon regeneration was only overcome with the manipulation of multiple pathways. Those RGCs were able to mitigate the injury response and simultaneously upregulated survival and regeneration associated programs (prior and after injury). Four independent ways of analysis identified these programs to be differentially regulated among RGCs, with distinct signatures for degenerating, surviving and regenerating cells. Finally, testing some genes associated with the regeneration-program in vivo identified potential future therapeutic targets to promote neuroprotection and axonal regeneration.

2022-06-28 | GSE202154 | GEO

Overlapping transcriptional programs promote survival and axonal regeneration of injured retinal ganglion cells [1]

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Transcriptional control of retinal ganglion cell death after axonal injury

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Chromatin accessibility and transcriptome changes in injured retinal ganglion cells (RGCs) after Arid1a deletion

Project description:To gain a deeper insight into roles of Arid1a in injured retinal ganglion cells (RGCs), we performed ATAC-seq and RNA-seq to analyze the genome-wide changes of chromatin accessibility and transcriptome changes before and after Arid1a deletion in RGCs of the adult mouse using Cre-lox system.

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Amacrine cells suppress retinal ganglion cells survival and optic nerve regeneration bu releasing intersynaptic zinc

Project description:Retinal ganglion cells (RGCs) convey the major output of information collected from the eye to the brain. RGCs are irreversibly lost when injured in degenerative diseases such as glaucoma; this failure can be partially reversed by eliminating the retinal mobile zinc (Zn2+) and leads to substantial axon regeneration. ZnT3 conditional knockout in retinal amacrine cells blocks the synaptic transport of Zn2+, which promotes RGC survival and axonal regeneration in optic nerve jinjury (ONC). Here, we conducted an mRNA sequencing of flow cytometry-isolated RGCs 3 days after optic nerve injury with or without ZnT3 expression in retinal amacrine cells.

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Overlapping transcriptional programs promote survival and axonal regeneration of injured retinal ganglion cells.

Project description:Injured neurons in the adult mammalian central nervous system often die and seldom regenerate axons. To uncover transcriptional pathways that could ameliorate these disappointing responses, we analyzed three interventions that increase survival and regeneration of mouse retinal ganglion cells (RGCs) following optic nerve crush (ONC) injury, albeit not to a clinically useful extent. We assessed gene expression in each of 46 RGC types by single-cell transcriptomics following ONC and treatment. We also compared RGCs that regenerated with those that survived but did not regenerate. Each intervention enhanced survival of most RGC types, but type-independent axon regeneration required manipulation of multiple pathways. Distinct computational methods converged on separate sets of genes selectively expressed by RGCs likely to be dying, surviving, or regenerating. Overexpression of genes associated with the regeneration program enhanced both survival and axon regeneration in vivo, indicating that mechanistic analysis can be used to identify novel therapeutic strategies.

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The dynamic translatome of retinal ganglion cell axons during assembly and maintenance of the mouse visual system

Project description:Local mRNA translation mediates the adaptive responses of axons to extrinsic signals but direct evidence that it occurs in mammalian CNS axons in vivo is scant. We developed an axon-TRAP-RiboTag approach in mouse that allows deep-sequencing analysis of ribosome-bound mRNAs in the retinal ganglion cell axons of the developing and adult retinotectal projection in vivo. The embryonic-to-postnatal axonal translatome comprises an evolving subset of enriched genes with axon-specific roles suggesting distinct steps in axon wiring, such as elongation, pruning and synaptogenesis. Adult axons, remarkably, have a complex translatome with strong links to axon survival, neurotransmission and neurodegenerative disease. Translationally co-regulated mRNA subsets share common upstream regulators, and novel sequence elements generated by alternative splicing that promote axonal mRNA translation. Our results indicate that intricate regulation of compartment-specific mRNA translation in mammalian CNS axons supports the formation and maintenance of neural circuits in vivo. The profiling of ribosome-bound mRNAs in mouse retinal ganglion cell axons at 4 different developmental stages

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Overlapping transcriptional programs promote survival and axonal regeneration of injured retinal ganglion cells

Project description:This SuperSeries is composed of the SubSeries listed below.

2022-06-28 | GSE202155 | GEO