Worm Mutagenesis
Worm Mutagenesis - Related Videos
10:44
An Introduction to Worm Lab: from Culturing Worms to Mutagenesis
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Cited by 27 •
2011
Screening for mutants with phenotypic defects is a straightforward method for identifying genes that function in a given biological process. In this article we describe how to culture free living worms (e.g., Pristionchus pacificus) in the laboratory and show two different mutagenesis methods, EMS and TMP/UV.
04:51
Optogenetic Random Mutagenesis Using Histone-miniSOG in C. elegans
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Cited by 6 •
2016
Genetically-encoded histone-miniSOG induces genome-wide heritable mutations in a blue light-dependent manner. This mutagenesis method is simple, fast, free of toxic chemicals, and well-suited for forward genetic screening and transgene integration.
01:36
Worms as an Alternative Model Organism
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2026
All animal procedures described here must be conducted in accordance with institutional animal ethics guidelines and approved by IACUC. All procedures must follow the principles of the 3Rs—Replacement, Reduction, and Refinement—and must be performed by trained personnel. Introduction to C. elegans The nematode (roundworm) Caenorhabditis elegans, commonly known as C. elegans, is a widely used non-vertebrate animal model for studying fundamental biological processes. Because many cellular and...
13:18
Single Oocyte Bisulfite Mutagenesis
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Cited by 14 •
2012
Bisulfite mutagenesis is the gold standard for analyzing DNA methylation. Our modified protocol allows for DNA methylation analysis at the single-cell level and was specifically designed for individual oocytes. It can also be used for cleavage-stage embryos.
04:19
Selective Cleaning of Caenorhabditis Worms for Enrichment of Intestinal Microbiota
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2026
Source: Morgan, E., et al. Selective Cleaning of Wild Caenorhabditis Nematodes to Enrich for Intestinal Microbiome Bacteria. J. Vis. Exp. (2021)This video demonstrates a protocol for isolating intestinal bacteria of interest from wild Caenorhabditis worms. The worms are first starved and washed to eliminate residual feeding bacteria from their surface and intestinal lumen while preserving the target microbes. After surface cleaning and multiple crawling steps, the worms are dissected to extract...
FAQs
Chemical mutagens such as ethyl methanesulfonate act by damaging or modifying DNA bases, creating sequence changes that may alter gene activity or function. Because the resulting changes can enter the germline, researchers can examine descendants rather than only treated animals. This makes it possible to associate an inherited molecular change with a phenotype observed in later generations.
Transmission through the germline is central because it converts a DNA alteration into a heritable experimental trait. Researchers can screen offspring for altered development, behavior, aging-related traits, or disease-relevant phenotypes, then retain individuals whose differences provide a starting point for genetic analysis. The phenotype therefore serves as an observable entry point into gene and pathway function.
Mapping, complementation, and sequencing offer complementary ways to connect an inherited phenotype with its genetic cause. Mapping helps relate the phenotype to a genomic location, complementation provides an additional genetic test, and sequencing examines DNA changes associated with the mutant. Used together, these approaches can move analysis from an observed trait toward a specific gene and pathway.
An altered trait does more than mark a changed worm: it can indicate that the affected gene participates in a biological process. After researchers connect the phenotype to a specific gene, they can place that gene in relation to a pathway. This helps interpret how genetic changes influence development, behavior, aging, or disease biology.
Researchers begin by generating mutations in nematodes, then examine offspring for altered phenotypes. Individuals showing informative traits are isolated for further genetic work. The mutant can then be mapped, complemented, or analyzed by sequencing, allowing investigators to connect the visible difference with a gene or pathway. This staged workflow links screening, inheritance, and molecular interpretation.
It is useful when researchers need to connect a biological trait with gene function in a manageable animal model. The approach supports investigations of development, behavior, aging, and disease biology, while nematodes provide tractable systems for testing conserved biological mechanisms. Findings can also identify targets for further research, extending the value beyond the initial mutant phenotype.
The nematode context matters because Caenorhabditis elegans provides a tractable model in which inherited phenotypes can be isolated and followed through genetic analysis. This enables researchers to study conserved biological mechanisms in an experimentally accessible organism. Consequently, worm mutants can serve as entry points for questions that extend from basic gene function to disease biology.