C Elegans Assay
C Elegans Assay - Related Videos
08:57
C. elegans Chemotaxis Assay
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2023
Chemotaxis is a process in which cells or organisms move in response to a chemical stimulus. In nature, chemotaxis is important for organisms to sense and move toward food sources and move away from stimuli that may be toxic or harmful. Chemotaxis is also important at the cellular level. For example, chemotaxis is required for the movement of sperm toward an egg prior to fertilization. In the lab, chemotaxis is frequently examined in the nematode, C. elegans, which is known to migrate...
06:28
C. elegans Chemotaxis Assay
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Cited by 163 •
2013
A method of quantitatively evaluating the chemotactic response of Caenorhabditis elegans is described. A chemotactic index (CI) was employed as a way to precisely evaluate the response of worms to certain targets, and serve as a platform of comparison between strains and compounds of interest.
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.
04:43
C. elegans Chemotaxis Assay: A Method to Test Chemosensation in Worms
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2023
This video introduces chemotaxis in the nematode C. elegans and shows a sample protocol testing chemotactic aversion to copper sulfate.
03:22
Electrotaxis Assay: A Method to Observe Locomotion in C. elegans
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2023
Researchers can trigger on-demand movement in C. elegans by applying an electric field that worms sense and respond to. This video introduces electrotactic behavior and shows a sample protocol that is done in a microfluidic device.
FAQs
Conserved cellular pathways allow researchers to relate a molecular change to an organism-level phenotype, such as altered movement, development, reproduction, survival, or behavior. This connection helps bridge different levels of biological organization: an intervention can be examined first through its effect on genes or cellular processes and then through measurable changes in the whole worm.
The measured outcome should match the biological question. Survival can indicate a harmful effect, whereas development and reproduction can reveal effects that do not immediately cause death. Movement and behavior provide additional organism-level readouts, helping researchers distinguish broad viability changes from effects that are more closely associated with function or behavioral responses.
A short life cycle allows biological effects to be evaluated across relevant stages within a relatively rapid experimental timeline. Well-characterized genetics supports studies that connect specific genetic changes with observed phenotypes. Together, these features make the model suitable for experiments that need both genetic interpretability and the ability to examine responses at the organism level.
Researchers maintain the worms under controlled conditions, introduce the compound or environmental condition, and then quantify a selected response. The same general workflow can be adapted to genetic changes. Outcomes may include survival, development, movement, reproduction, or behavior, so the chosen measurement should correspond to the biological effect being investigated.
For gene function studies, researchers can examine how a genetic change alters an observable worm phenotype. In toxicology, they can measure how a compound or environmental condition affects survival, development, movement, reproduction, or behavior. The model is especially useful when investigators need a relatively rapid and scalable way to connect an intervention with biological effects.
In drug discovery, the assay can help evaluate biological responses to compounds before testing in more complex systems. Its measurable organism-level outcomes also support aging research and neurobiology, where changes in survival, development, movement, reproduction, or behavior may reveal relevant effects. These applications extend the model beyond single-gene analysis to broader biological questions.