C. Elegans Screening
C. Elegans Screening - Related Videos
14:53
High-throughput Screening and Biosensing with Fluorescent C. elegans Strains
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Cited by 63 •
2011
A procedure for liquid-based culturing and dispensing of C. elegans strains expressing fluorescent reporter proteins is described that does not require expensive sorting equipment. This approach can be applied to numerous inducible C. elegans genes for drug discovery or biosensing of contaminants.
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.
02:35
A Multiwell Liquid-Based Assay for Screening C. elegans Knockdowns
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2025
Source: Anderson, Q. L. et al. A High-throughput, High-content, Liquid-based C. elegans Pathosystem. J. Vis. Exp. (2018)This video demonstrates a high-throughput screening method using Caenorhabditis elegans to study gene knockdowns during host-pathogen interactions. It outlines the procedure for preparing knockdown worms and transferring them to assay plates to evaluate the effects of pathogen-induced worm killing.
09:40
RNAi Screening to Identify Postembryonic Phenotypes in C. elegans
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Cited by 9 •
2012
We describe a sensitized method to identify postembryonic regulators of protein expression and localization in C. elegans using an RNAi-based genomic screen and an integrated transgene that expresses a functional, fluorescently tagged protein.
09:51
RNAi in C. elegans
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2023
RNA interference (RNAi) is a widely used technique in which double stranded RNA is exogenously introduced into an organism, causing knockdown of a target gene. In the nematode, C. elegans, RNAi is particularly easy and effective because it can be delivered simply by feeding the worms bacteria that express double stranded RNA (dsRNA) that is complementary to a gene of interest. First, this video will introduce the concept of RNA interference and explain how it causes targeted gene knockdown.
FAQs
Primary screens are designed to find candidates, whereas follow-up assays test whether an observed phenotype is reproducible and biologically meaningful. In C. elegans screening, researchers first identify altered movement, development, reproduction, or lifespan, then examine selected candidates more carefully. Genetic validation can strengthen evidence that a gene or perturbation contributes to the trait rather than reflecting an isolated observation.
These traits provide measurable views of distinct biological processes. Movement can reveal effects on organismal function, while development and reproduction show consequences for growth and fertility. Lifespan supports studies of aging and long-term biological effects. Because the nematode has a transparent body and defined cell lineage, researchers can connect visible or measurable outcomes with underlying biological questions.
The screening design can apply different types of perturbation, including changes affecting genes, test compounds, or environmental factors. Researchers then compare the resulting phenotypes across the selected conditions, using traits such as movement, development, reproduction, or lifespan as outcome measures. Follow-up assays and genetic validation help clarify whether a candidate effect is consistent and associated with the intended biological process.
A typical workflow begins by applying a genetic perturbation, test substance, or environmental condition to the nematodes. Researchers then score a defined phenotype, identify candidates that alter the selected trait, and repeat or extend the analysis in follow-up assays. Genetic validation provides an additional step for testing mechanism and reproducibility before interpreting the finding more broadly.
The approach is useful when researchers need an efficient biological system for finding compounds that change measurable traits or for detecting potentially harmful effects. Screening can reveal candidates that influence movement, development, reproduction, or lifespan. Those results provide evidence for prioritizing compounds and can guide later investigation in more complex organisms, rather than serving as a complete substitute for them.
C. elegans screening supports research on gene function, aging, neurobiology, disease mechanisms, and drug discovery. Its conserved molecular pathways allow findings in the nematode to provide evidence relevant to broader biological questions, while its short generation time and defined cell lineage support efficient investigation. Researchers can use these results to guide studies in more complex organisms and refine mechanistic hypotheses.