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Circular RNAs in the ageing African turquoise killifish

ABSTRACT: In this work we took 9 samples from brain and 6 samples from muscle of the African turquoise killifish (Nothobranchius furzeri) at 3.5, 8.5 and 14 weeks. Total RNA was sequenced and circRNAs were detected.

ORGANISM(S): Nothobranchius furzeri

PROVIDER: GSE134065 | GEO | 2019/07/31

REPOSITORIES: GEO

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Nothobranchius furzeri

Project description:Turquoise killifish (Nothobranchius furzeri) gut microbiota

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Circular RNAs in the ageing African turquoise killifish

Project description:Circular RNAs in the ageing African turquoise killifish

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A cross-sectional study of gene expression in different strains of Nothobranchius furzeri

Project description:We quantified gene expression in three different strains of the short-lived killifish Nothobranchius furzeri during aging.

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RNA sequencing of gonad tissue of Nothobranchius furzeri at different age in males and females

Project description:Quantification of gene expression at different dvelopmental stages of the short-lived killifish Nothobranchius furzeri GRZ strain.

2024-04-15 | GSE263626 | GEO

Nothobranchius furzeri strain:GRZ

Project description:Low coverage genome sequence of the turquoise killifish, Nothobranchius furzeri

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Longitudinal RNA-Seq study of Nothobranchius furzeri fin biopsies

Project description:Here, we performed a longitudinal study of genome-wide gene expression in the short-lived killifish Nothobranchius furzeri (MZM-0410 strain) and correlated variations in transcript abundance at two time points during early adult life with age at death.

2020-06-24 | GSE150318 | GEO

Evolution of diapause in the African killifish by remodeling ancient gene regulatory landscape

Project description:Suspended animation (e.g. hibernation, diapause) allows organisms to survive extreme environments. But the mechanisms underlying the evolution of suspended animation states are unknown. The African turquoise killifish has evolved diapause as a form of suspended development to survive the complete drought that occurs every summer. Here, we show that gene duplicates – paralogs – exhibit specialized expression in diapause compared to normal development in the African turquoise killifish. Surprisingly, paralogs with specialized expression in diapause are evolutionarily very ancient and are present even in vertebrates that do not exhibit diapause. To determine if evolution of diapause is due to the regulatory landscape rewiring at ancient paralogs, we assessed chromatin accessibility genome-wide in fish species with or without diapause. This analysis revealed an evolutionary recent increase in chromatin accessibility at very ancient paralogs in African turquoise killifish. The increase in chromatin accessibility is linked to the presence of new binding sites for transcription factors, likely due to de novo mutations and transposable element (TE) insertion. Interestingly, accessible chromatin regions in diapause are enriched for lipid metabolism genes, and our lipidomics studies uncover a striking difference in lipid species in African turquoise killifish diapause, which could be critical for long-term survival. Together, our results show that diapause likely originated by repurposing pre-existing gene programs via recent changes in the regulatory landscape. This work raises the possibility that suspended animation programs could be reactivated in other species for long-term preservation via transcription factor remodeling and suggests a mechanism for how complex adaptations evolve in nature.

2021-08-05 | ST001898 | MetabolomicsWorkbench

small RNA-seq of three tissues (brain, liver, skin) of Nothobranchius furzeri (at different ages) and Brain samples of 6 other killifish species

Project description:The RNA-seq data contain 3 tissues (brain, liver, skin) of N. furzeri strains MZM-0410 and GRZ plus 2 biological replicates of brain of 6 other killifish species. Jena Centre for Systems Biology of Ageing - JenAge (www.jenage.de)

2017-09-29 | GSE104321 | GEO

Senolytics improve the neurogenic potential of non-glial progenitors and neurorepair in the dorsal pallium of aged killifish independent of inflammation

Project description:With advancing age, senescent cells accumulate as they are not efficiently cleared by the immune system anymore. Via a senescence-associated secretory phenotype, chronic senescent cells alter the microenvironment, creating an unfavorable milieu for neurogenesis and neurorepair. Using an innovative and rapid aging model, the African turquoise killifish, we have previously demonstrated a dramatic decline in neurogenic potential of non-glial progenitors with age. Even after traumatic brain injury, progenitor proliferation and neuron production was very low in aged killifish in comparison to young adult killifish, and overall neurorepair was incomplete. In the present study, we validated if the senolytic cocktail dasatinib and quercetin (D+Q) could reboot the neurogenic output by clearing chronic senescent cells from the aged killifish brain to re-create the necessary supportive environment. Our results confirm that the aged killifish telencephalon holds a very high senescent cell burden, which we could diminish by short-term systemic D+Q treatment. As a consequence of D+Q administration, proliferation of non-glial progenitors increased and more new neurons were generated and migrated into the parenchyma after injury. Injury-induced inflammation and glial scarring, a phenomenon only seen in aged killifish, remained unaltered. Senolytic treatment with D+Q might thus hold promise for improving brain function in aged populations, and is especially interesting for reviving the neurogenic potential of an already aged central nervous system.

2023-07-20 | PXD036437 | Pride

Protein Aggregation and Quality Control in Aging Killifish

Project description:Protein aggregation is a hallmark of age-related neurodegeneration. Yet whether aggregation drives age-related dysfunction and disease in other tissues is poorly understood. Here, we leverage the African turquoise killifish to obtain a systematic understanding of protein aggregation in seven tissues in an aging vertebrate.

2020-10-17 | MSV000086315 | MassIVE

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