Transgenic Strains
Transgenic Strains - Related Videos
02:58
Measurement of Compressive Stress-Strain Response at Small-Strains
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2025
This protocol presents the configuration of a compression test device capable of precisely measuring the mechanical properties of microstructures in the small-strain region, along with a systematic method for compression testing using this device. The proposed device can be used to analyze various microstructures and the mechanical behavior of polymer-based materials.
10:15
Generation of Transgenic C. elegans by Biolistic Transformation
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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.
02:16
Differentiating Non-Transgenic and Transgenic Human Pluripotent Stem Cells into Neural Progenitor Cells
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2025
This video demonstrates the generation of neural progenitor cells from non-transgenic and transgenic human pluripotent stem cells (hPSCs). hPSCs are differentiated into neural progenitor cells using a neuronal differentiation medium. While differentiation is induced in non-transgenic cells using small molecules, the transgenic hPSCs are differentiated by adding an antibiotic that induces the promoter for a neuronal differentiation-specific transcription factor.
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.
14:53
Stress-Strain Characteristics of Aluminum
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2023
Source: Roberto Leon, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA Aluminum is one of the most abundant materials in our lives, as it is omnipresent in everything from soda cans to airplane components. Its widespread use is relatively recent (1900AD), primarily because aluminum does not occur in its free state, but rather in combination with oxygen and other elements, often in the form of Al2O3. Aluminum was originally obtained from bauxite mineral deposits...
FAQs
The genomic location of an introduced construct can influence how strongly or consistently it is expressed, making insertion-site validation important. Researchers must determine whether observed traits reflect the intended gene activity or effects associated with where the DNA integrated. Comparing validated lines and appropriate controls helps distinguish transgene-related phenotypes from insertion-associated variation.
Regulatory elements determine when and where the introduced gene or construct is active. By controlling expression patterns, they allow researchers to examine gene effects in particular biological contexts rather than throughout the entire organism. This control supports studies of gene function, cell behavior, and disease-related processes by linking expression to specific tissues, stages, or conditions.
Genetic background can influence biological traits independently of the introduced construct. Consequently, differences between a transgenic line and a comparison group may not arise solely from transgene activity. Maintaining suitable controls and accounting for background variation improves phenotype interpretation, supports comparisons among lines, and reduces the risk of attributing unrelated genetic effects to the introduced sequence.
Generation begins by introducing foreign DNA or a genetic construct into reproductive cells or early embryos. If the construct integrates into the genome, the resulting organism can be evaluated for insertion and expression. Lines showing the desired genetic and biological characteristics may then be followed across generations to assess inheritance and establish a useful research strain.
Researchers can examine how a specific DNA sequence changes biology by observing traits associated with its expression in a transgenic strain. These organisms can model aspects of human disease and help connect gene activity with biological outcomes. The resulting phenotypes provide experimental evidence about gene function, especially when expression patterns and appropriate controls are carefully validated.
In addition to human disease studies, these strains can help track cell lineages, revealing how cells contribute to biological structures or processes over time. They can also be used to test therapeutic traits and agricultural traits. The value of each application depends on confirming where the construct integrated, how it is expressed, and whether controls support the interpretation.