Transgenic Worm Strains
Transgenic Worm Strains - Related Videos
02:48
Examine Chemoavoidance Behavior in Transgenic Worms Using Osmotic Avoidance Assay
0 Views •
2025
This video describes an osmotic avoidance assay to examine chemoavoidance behavior in a transgenic worm model. Avoidance behavior is tested in a plate in the presence of a high-osmotic barrier and chemoattractant. The worms with a functional loss of neurons get attracted by the chemoattractant, cross the high-osmotic barrier, and become paralyzed in the trap zone because of the anesthetic solution.
10:44
An Introduction to Worm Lab: from Culturing Worms to Mutagenesis
0 Views •
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.
01:36
Worms as an Alternative Model Organism
0 Views •
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...
10:15
Generation of Transgenic C. elegans by Biolistic Transformation
0 Views •
Cited by 27 •
2010
Transgenic worms are commonly used in C. elegans research. Described is a simple, yet effective, protocol to introduce transgenes into worms using biolistic bombardment with DNA-coated gold particles. The effort involved and results of bombardment compare favorably with microinjection for the generation of transgenic animals.
13:59
Assaying β-amyloid Toxicity using a Transgenic C. elegans Model
0 Views •
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.
FAQs
The introduced DNA construct combines a gene of interest with regulatory sequences that control its activity. These sequences help determine whether the gene is expressed, as well as the developmental or adult context in which its effects can be observed. Their inclusion allows researchers to connect gene activity with specific biological processes rather than examining the gene in isolation.
Tissue-specific promoters restrict expression of an introduced gene to selected tissues, making it possible to examine localized gene function. This approach can reveal whether a gene acts in a particular biological context and can help distinguish tissue-specific effects from consequences of expression throughout the worm. Such comparisons are especially relevant to development and neuroscience studies.
Reporter genes provide visible or otherwise measurable information about when and where genetic activity occurs, whereas targeted gene modifications are used to alter a biological process and examine the resulting phenotype. Using either strategy, or combining them with regulatory elements, lets researchers relate gene expression patterns to functional consequences in living worms.
A typical workflow begins with designing a DNA construct containing the gene of interest and appropriate regulatory sequences. The construct is delivered into the worm germline, and resulting lines are evaluated for inherited sequence activity and observable effects. Researchers then examine developing or adult worms to relate expression patterns or genetic changes to biological outcomes.
These strains can connect a molecular change with an observable phenotype in a living organism. Reporter-based designs can indicate when and where a gene acts, while modified genes can reveal effects on biological processes. Examining both developing and adult worms may show whether the consequences vary across life stages or reflect a broader role.
Their value comes from combining inherited genetic changes with observations made in a tractable living model. Researchers can investigate gene function in genetics, development, neuroscience, aging, and disease biology, then compare molecular alterations with organism-level phenotypes. This breadth makes the strains useful for studying how gene activity contributes to normal processes and disease-related biology.