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ABSTRACT: Updating the genome of the African turquoise killifish (Nothobranchius furzeri)

PROVIDER: PRJNA1282602 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR34221554_subreads.fastq.gz	Fastqsanger.gz

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Circular RNAs in the ageing African turquoise killifish

Project description: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.

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Project description:Aging individuals exhibit a pervasive decline in adaptive immune function, with important implications for health and lifespan. Previous studies have found a pervasive loss of immune-repertoire diversity in human peripheral blood; however, little is known about repertoire aging in other immune compartments, or in species other than humans. Here, we perform the first study of immune-repertoire aging in an emerging model of vertebrate aging, the African turquoise killifish (Nothobranchius furzeri). Despite their extremely short lifespans, these killifish exhibit complex and individualised heavy-chain repertoires, with a generative process capable of producing millions of distinct productive sequences. Whole-body killifish repertoires decline rapidly in within-individual diversity with age, while between-individual variability increases. Large, expanded B-cell clones exhibit far greater diversity loss with age than small clones, suggesting an important difference in the age-sensitivity of different B cell populations. Compared to the whole body, the immune repertoires of isolated intestinal samples exhibit much more dramatic age-related phenotypes, apparently due to an elevated prevalence of age-sensitive expanded clones. Our results highlight the importance of organ-specific dynamics in adaptive immunosenescence.

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Identification of retinal cell types within the ageing African turquoise killifish retina and their respective age-related transcriptional changes using scRNA-seq

Project description:The mammalian central nervous system (CNS) and its retina are susceptible to age-related patholgoies, resulting in progressive, irreversible diseases like glaucoma and age-related macular degeneration (AMD), which are increasingly prevalent with rising life expectancy. Currently, there are no targeted long-term therapies to prevent vision loss. The short lived African turquoise killifsh (Nothobranchius furzeri, GRZ-AD) is a valuable genetic model for ageing studies, displaying rapid ageing phenotypes within its four to six-month lifespan. Our investigation on the molecular consequences of ageing in the retina, employing scRNA-sequencing, shows a a comprehensive overview of the cellular heterogeneity of the killifish retina, uncovering age-related gene expression changes specific to certain retinal cell populations.

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Project description:The mammalian central nervous system (CNS) is susceptible to age-related pathologies, resulting in progressive, irreversible disease. Neurodegenerative eye conditions, like glaucoma and age-related macular degeneneration (AMD), are on the rise due to increased life expectancy. Despite this, there are currently no long-term therapies to prevent degeneration and vision loss. The short-lived African turquoise kililfsh (Nothobranchius furzeri GRZ-AD) is an ideal genetic model for ageing studies, exhibiting rapid ageing phenotypes within its four to six-mont lifespan. Investigating the molecular consequences of ageing in the retina, we conducted bulk RNA-sequencing, revealing dysregulation of genetic pathways associated with ageing CNS and retinal diseas in the aged killifish retina.

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

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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.

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