Related Experiment Video
Updated: Jun 16, 2026
07:25
Long-Term Culture of Individual Caenorhabditis elegans on Solid Media for Longitudinal Fluorescence Monitoring and Aversive Interventions
Published on: December 2, 2022
1.6K
Analysis of Different Strains of the Turquoise Killifish Identify Transcriptomic Signatures Associated With Heritable
Mariateresa Mazzetto1, Kathrin Reichwald2, Philipp Koch2
1BIO@SNS, Scuola Normale Superiore, Pisa, Italy.
Summary
The African turquoise killifish (Nothobranchius furzeri) shows lifespan differences due to early-life gene expression, not age. This finding impacts aging research using this model organism.
Area of Science:
- Genomics
- Aging Research
- Comparative Biology
Background:
- The African turquoise killifish (Nothobranchius furzeri) is a valuable model for aging research.
- Captive strains exhibit significant lifespan variations, prompting investigation into genetic underpinnings.
Purpose of the Study:
- To identify gene expression differences correlating with lifespan variations between Nothobranchius furzeri strains.
- To understand the genetic basis of lifespan determination in this model organism.
Main Methods:
- Transcriptomic analysis of four tissues and embryos from GRZ and MZM0410 strains.
- Validation using a dataset from a third, longer-lived strain.
- Network analysis to identify key biological pathways.
Main Results:
- Distinct transcriptome patterns observed between strains from the embryonic stage.
- Genotype significantly impacts gene expression more than age.
- Upregulated RNA processing and histone modification pathways in the shorter-lived GRZ strain.
- GRZ strain exhibits transcriptional aging signatures early in life, indicating anticipated aging.
Conclusions:
- Lifespan differences in Nothobranchius furzeri are influenced by early-life genetic events rather than progressive age-related accumulation of differences.
- The GRZ strain's short lifespan is associated with premature transcriptional aging.
- Replication of intervention studies in longer-lived strains is recommended due to observed strain-specific genetic effects.
More Related Videos
Related Concept Videos
01:08Evolution of Microbial Genome
Microbial genome evolution is a highly dynamic process shaped by continual gene gain and loss across species and strains. This genomic flexibility allows microorganisms to adapt rapidly to environmental pressures and interactions with other organisms. Central to understanding this diversity is the distinction between the core and pan genomes.The core genome comprises the genes shared by all sampled strains of a species, representing essential functions needed for fundamental cellular processes.
01:24Evolution of New Traits in Microbes
Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...
02:11Reporter Genes
Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
Commonly used reporter...
Commonly used reporter...
02:05Gene Evolution - Fast or Slow?
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...