Alternative Animal Models
Alternative Animal Models - Related Videos
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...
26:43
Computer-Generated Animal Model Stimuli
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Cited by 8 •
2007
Computer-generated stimuli using the Jacky dragon as a model.
01:31
Zebrafish as an Alternative Vertebrate Model Organism in Biomedical Research
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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. Zebrafish (Danio rerio) are widely used as an alternative vertebrate model organism in biomedical research. Their genetic similarity to humans, rapid development, and suitability for large-scale studies make them valuable tools...
04:28
Utilizing an Orally Dissolving Strip for Pharmacological and Toxicological Studies: A Simple and Humane Alternative to Oral Gavage for Animals
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Cited by 4 •
2016
The following protocol describes a novel method for chronic oral drug administration using an orally dissolving strip (ODS) in lieu of the more commonly used oral gavage method. We demonstrate that preclinical, oral drug delivery using the ODS method represents a safe, convenient, and humane alternative to oral gavage.
10:02
Assessment of Spontaneous Alternation, Novel Object Recognition and Limb Clasping in Transgenic Mouse Models of Amyloid-β and Tau Neuropathology
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Cited by 199 •
2017
Described here is a staged, behavioral screening approach that can be used to screen for compounds that exhibit in vivo efficacy on cognitive and functional motor behaviors in transgenic mouse models of β-amyloidosis and tauopathy. These methods are optimized to screen compounds for activity in short-term and working memory tasks.
FAQs
Conserved genes, cellular pathways, and physiological traits allow findings in one organism to illuminate related processes in another. Researchers can use these shared features to investigate biological mechanisms, disease, development, or environmental responses without relying exclusively on standard laboratory species. The value of a model depends on how closely its conserved biology matches the question being studied.
Practical and biological characteristics both influence model selection. Rapid reproduction can support efficient experiments, genetic tractability can help researchers investigate biological mechanisms, and transparent embryos can make developmental processes easier to examine. Adaptation to specialized environments may also suit environmental-response studies. These advantages should be matched to the specific hypothesis rather than treated as universally beneficial.
Using both types of organisms can combine efficient discovery with broader biological relevance. Alternative models may reveal mechanisms quickly or provide access to traits such as transparent embryos, while standard species can support later investigation in a different biological context. This complementary strategy helps researchers test hypotheses efficiently and determine which findings merit further mammalian study.
Selection begins with the biological process and the model's relevant strengths. Zebrafish, fruit flies, nematodes, amphibians, and other invertebrates offer different combinations of conserved biology, reproduction rate, genetic tractability, embryo visibility, and environmental adaptation. Researchers therefore choose the organism whose traits best expose the mechanism or response under investigation, rather than selecting a model solely by familiarity.
These organisms can support studies of development, host-pathogen interaction, toxicity, regeneration, disease, and environmental responses. Their practical advantages make it possible to test hypotheses efficiently across several biological contexts. Results can reveal mechanisms or patterns that guide subsequent research, including studies that examine whether the findings are relevant to mammalian biology or specialized environmental conditions.
Models adapted to specialized environments can help researchers examine biological responses to environmental conditions. The broader range of organisms also supports conservation research by extending investigation beyond standard laboratory species. In this context, the model is selected for its relevant physiological traits and environmental relationship, allowing researchers to connect biological mechanisms with responses important to particular organisms or settings.
Findings from these models can identify biological mechanisms, disease-related processes, developmental patterns, or responses that warrant examination in mammals. They do not automatically replace mammalian research; instead, they help researchers test hypotheses efficiently and prioritize questions for subsequent investigation. This progression can also inform decisions about which model is best suited to a specific scientific question.