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Effect of housing condition (group- or single-housing) on gene expression in African turquoise killifish I.

ABSTRACT: To explore the effects of the housing condition (group- or single-housing) on killifish, we performed RNA-seq analysis for the whole bodies of male and female juveniles, gonads of males and females from puberty to middle age, and livers of young and old males.

ORGANISM(S): Nothobranchius furzeri

PROVIDER: GSE245480 | GEO | 2024/10/13

REPOSITORIES: GEO

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Effect of housing condition (group- or single-housing) on gene expression in African turquoise killifish II.

Project description:To explore the effects of the housing condition (group- or single-housing) on killifish, we performed RNA-seq analysis for the whole bodies of male and female juveniles, gonads of males and females from puberty to middle age, and livers of young and old males.

2024-10-13 | GSE245481 | GEO

Circular RNAs in the ageing African turquoise killifish

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Effect of housing condition (group- or single-housing) on gene expression in African turquoise killifish

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

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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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Chromosome conformation capture (Hi-C) of the turquoise killifish

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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:Lifespan is a remarkably diverse trait ranging from a few days to several hundred years in nature, but the mechanisms underlying the evolution of lifespan differences remain elusive. Here we de novo assemble a reference genome for the naturally short-lived African turquoise killifish, providing a unique resource for comparative and experimental genomics. The identification of genes under positive selection in this fish reveals potential candidates to explain its compressed lifespan. Several aging genes are under positive selection in this short-lived fish and long-lived species, raising the intriguing possibility that the same gene could underlie evolution of both compressed and extended lifespans. Comparative genomics and linkage analysis identify candidate genes associated with lifespan differences between various turquoise killifish strains. Remarkably, these genes are clustered on the sex chromosome, suggesting that short lifespan might have co-evolved with sex determination. Our study provides insights into the evolutionary forces that shape lifespan in nature.

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Project description:To study the effect of dietary restriction on killifish, we generated transcriptomes (RNA-seq) for the livers and brains of male and female killifish that had been subjected to different dietary treatements.

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Project description:Gut bacteria occupy the interface between the organism and the external environment, contributing to homeostasis and disease. Yet, the causal role of the gut microbiota during host aging is largely unexplored. Here, using the African turquoise killifish (Nothobranchius furzeri), a naturally short-lived vertebrate, we show that the gut microbiota plays a key role in modulating vertebrate life span. Recolonizing the gut of middle-age individuals with bacteria from young donors resulted in life span extension and delayed behavioral decline. This intervention prevented the decrease in microbial diversity associated with host aging and maintained a young-like gut bacterial community, characterized by overrepresentation of the key genera Exiguobacterium, Planococcus, Propionigenium and Psychrobacter. Our findings demonstrate that the natural microbial gut community of young individuals can causally induce long-lasting beneficial systemic effects that lead to life span extension in a vertebrate model.

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