C. Elegans Toxicity
C. Elegans Toxicity - Related Videos
02:05
Evaluating Bacterial Virulence Using the C. elegans Liquid Toxicity Assay
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2026
Source: Chen, Y., et al. Evaluating Virulence and Pathogenesis of Aeromonas Infection in a Caenorhabditis elegans Model. J. Vis. Exp. (2018).This video demonstrates the C. elegans Liquid Toxicity Assay with Aeromonas, a method used to evaluate bacterial virulence by measuring worm survival in a nutrient-limited liquid environment. The assay reveals strain-specific pathogenicity based on the extent of toxin-induced damage and mortality in C. elegans.
10:49
Measuring RAN Peptide Toxicity in C. elegans
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Cited by 5 •
2020
Repeat-associated non-ATG-dependent translational products are emerging pathogenic features of several repeat expansion-based diseases. The goal of the protocol described is to evaluate toxicity caused by these peptides using behavioral and cellular assays in the model system C. elegans.
13:59
Assaying β-amyloid Toxicity using a Transgenic C. elegans Model
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Cited by 76 •
2010
The intensely studied nematode worm Caenorhabditis elegans can be transgenically engineered to express the human β-amyloid peptide (Aβ). Induced expression of Aβ in C. elegans muscle leads to a rapid, reproducible paralysis phenotype that can be used to monitor treatments that modulate Aβ toxicity.
02:56
C. elegans Survival Assay: A Short-Term Toxicity Test
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2023
This video introduces a short-term survival assay that tests a treatment for acute toxicity or tests a genetic strain for resistance to a toxic condition. The example protocol shows an example survival assay in which worms are tested for their ability to resist oxidative stress induced by paraquat (PQ).
11:34
Basic Caenorhabditis elegans Methods: Synchronization and Observation
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Cited by 452 •
2012
The easiness of maintaining and propagating the nematode C. elegans make it a nice model organism to work with. The possibility of synchronizing worms allows the work with a significant amount of subjects at the same developmental stage, what facilitates the study of one particular process in many animals.
FAQs
Dose links the concentration of an exposure to the severity of a biological response. Testing defined concentrations allows researchers to determine whether increasing exposure is associated with greater effects on survival, growth, movement, reproduction, or cellular stress. This relationship helps distinguish relatively mild physiological changes from more substantial toxicity and supports comparison among chemicals or drugs.
Different endpoints provide clues about which biological processes are affected. Developmental changes can indicate disrupted growth, whereas altered movement may point to impaired neuromuscular function. Effects on reproduction or cellular stress provide additional evidence of physiological damage. Examining several outcomes together gives a more informative picture than relying on survival alone.
Because C. elegans is genetically tractable, researchers can investigate toxicity in relation to biological pathways and disease-related mechanisms. This feature helps connect an observed response, such as impaired movement or development, with underlying cellular processes. In medicine, that mechanistic perspective can make toxicity findings more useful for evaluating drug effects and safety.
A typical assay exposes C. elegans to defined concentrations of a chemical, drug, or other test substance, then measures selected biological outcomes. Researchers may assess survival, growth, movement, reproduction, and cellular stress, depending on the question. Comparing these measurements across exposure levels reveals dose-related physiological damage and identifies which functions are most affected.
The method is especially useful during early drug safety assessment and pharmacological screening. It enables researchers to examine harmful effects before advancing a candidate to testing in more complex animal models. Because multiple physiological outcomes can be measured, the approach can help identify concerning responses while supporting relatively rapid and cost-effective evaluation.
Toxicity responses can connect exposure to processes relevant to disease biology, including disrupted development, impaired neuromuscular function, and cellular stress. Researchers can use these phenotypes to investigate how a drug or chemical affects biological pathways in a living model. This context supports mechanistic interpretation and helps prioritize questions for subsequent studies in more complex systems.