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Animal Models in Biomedical Research
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Animal Models in Biomedical Research

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Questions and Answers

Which technique has been widely used for creating transgenic mice with tissue-specific promoters or chemical mediators?

  • Lentivirus-mediated transgenic manipulation
  • Zinc-finger nucleases
  • The Cre-lox system (correct)
  • The microinjection method
  • What has the microinjection method for producing transgenic mice been modified to transfer?

  • YAC transgenic mice
  • Lentivirus-mediated transgenic manipulation
  • Large multilocus segments of human DNA (correct)
  • TAL effector elements
  • Which technique has been used to create YAC transgenic mice to study higher levels of transcription and developmental regulation of gene expression?

  • The TALEN technique
  • The Cre-lox system
  • YAC transgenic mice (correct)
  • Zinc-finger nucleases
  • Compared to other mammalian genomes, which genome is relatively easy to genetically manipulate?

    <p>Mouse embryo</p> Signup and view all the answers

    What is a limiting factor for targeted mutation in non-mouse species?

    <p>Low frequency of recombinational events</p> Signup and view all the answers

    Which technique has been efficient for creating transgenic animals due to its ability to allow a higher percentage of progeny expressing the transgene?

    <p>Lentivirus-mediated transgenic manipulation</p> Signup and view all the answers

    Which technique relies on the normal double-strand break repair process of the host?

    <p>Zinc-finger nucleases</p> Signup and view all the answers

    What does the TALEN technique utilize to generate DNA cleavage in a site-specific fashion?

    <p>TAL effector elements</p> Signup and view all the answers

    In which organisms has TALEN technology proven highly efficient?

    <p>Plants and large agricultural animals</p> Signup and view all the answers

    What is the reported efficiency of both zinc-finger nucleases and TALEN compared to standard strategies?

    <p>Around 10%</p> Signup and view all the answers

    What have the advanced techniques allowed for more efficient creation of?

    <p>Non-mouse transgenic/knockout animals</p> Signup and view all the answers

    Which type of animal model involves transplanting tissue biopsies into immunodeficient mice to test treatment modalities for specific tumors?

    <p>Personalized cancer treatment models</p> Signup and view all the answers

    Which animal model is used to study human infectious and immunological diseases by reconstituting with human stem cells?

    <p>NSG (NOD, SCID, IL2 receptor knockout) mouse model</p> Signup and view all the answers

    Which animal model is crucial in demonstrating the critical role of the microbiome in the development of diet-induced obesity and its impact on diverse diseases?

    <p>Gnotobiotic mice</p> Signup and view all the answers

    Which type of animal model involves chemical mutagenesis, diet-induced models, and complex induced models to study diseases, nutrient deficiencies, and physiological processes?

    <p>Induced animal models</p> Signup and view all the answers

    Which animal model is used to study the impact of microbiota on host processes and its variability in research subjects?

    <p>Gnotobiotic mice</p> Signup and view all the answers

    Which animal model is used as a small-animal model for studying immune-related diseases by injecting with human lymphocytes or stem cells?

    <p>NSG (NOD, SCID, IL2 receptor knockout) mouse model</p> Signup and view all the answers

    Which type of animal model involves using veterinary clinical patients with spontaneous tumors to evaluate new cancer treatments?

    <p>Spontaneous tumor models</p> Signup and view all the answers

    Which animal model has contributed significantly to understanding brain plasticity, organ transplantation, and the development of various medical treatments and procedures?

    <p>Induced animal models</p> Signup and view all the answers

    Which animal model is used to study the microbiome's critical role in various diseases by manipulating the host microbiota?

    <p>Gnotobiotic mice</p> Signup and view all the answers

    Which animal model is used to study toxicology and drug safety assessments in biomedical research?

    <p>Veterinary clinical patients with spontaneous tumors</p> Signup and view all the answers

    Which animal models are commonly used in toxicological and drug safety research?

    <p>Dogs, nonhuman primates, and swine</p> Signup and view all the answers

    What technique is used to create genetically manipulated animals through single base pair mutations in germ cells?

    <p>Chemical mutagenesis using ENU injection in male mice</p> Signup and view all the answers

    What method of transgenic manipulation involved direct insertion of cloned genetic material into the pronucleus of a fertilized mouse egg?

    <p>Pronuclear microinjection</p> Signup and view all the answers

    What allows genes to be turned off or on in response to tetracycline administration?

    <p>Insertion of a tetracycline element into the system</p> Signup and view all the answers

    Which animal has been extensively used for development studies due to their transparent embryos and large-scale mutagenesis using compounds like ENU?

    <p>Zebrafish</p> Signup and view all the answers

    What is used to alter gene expression in a tissue-specific or temporally regulated fashion?

    <p>Tissue-specific promoters, enhancers, and receptors</p> Signup and view all the answers

    What has been used as a germline mutagen, causing small chromosomal deletions in mice spermatogonia, postmeiotic germ cells, and oocytes?

    <p>Irradiation</p> Signup and view all the answers

    Which animal models are known for their close homology to the human genome, leading to the creation of animal models that mimic human diseases?

    <p>Mouse</p> Signup and view all the answers

    What technique involves the insertion of genes by targeted homologous recombination, producing chimeras and eventually founders with germline expression of the mutation?

    <p>Mouse ESC lines</p> Signup and view all the answers

    What is used for traditional rodent models for toxicology studies?

    <p>B6C3F1 hybrid mouse and the Fisher F344 rat</p> Signup and view all the answers

    What creates small base pair mutations in germ cells, leading to the creation of useful models for human diseases?

    <p>Chemical mutagenesis using ENU injection in male mice</p> Signup and view all the answers

    What is the primary purpose of animal models in biomedical research?

    <p>To represent analogous or homologous processes related to genetic sequences</p> Signup and view all the answers

    Which type of modeling evaluates hierarchical levels of a process?

    <p>Many-to-many modeling</p> Signup and view all the answers

    What is a significant limitation of spontaneous models in biomedical research?

    <p>Their unpredictable development and reliance on chance</p> Signup and view all the answers

    Which type of animals have contributed to research in neurobiology, genetics, and development?

    <p>Nematodes, fruit flies, and sea urchins</p> Signup and view all the answers

    What is the primary driver of homologous modeling mentioned in the text?

    <p>The genetically manipulated mouse</p> Signup and view all the answers

    Which type of diseases are commonly studied using many-to-many modeling?

    <p>Complex and often polygenic diseases like cancer and obesity</p> Signup and view all the answers

    What do comparative genomics demonstrate between commonly used research species and humans?

    <p>Genetic conservation</p> Signup and view all the answers

    What are induced models in biomedical research?

    <p>Models resulting from surgical, genetic, chemical, or other manipulation</p> Signup and view all the answers

    What are spontaneous models in biomedical research?

    <p>Models that are naturally occurring</p> Signup and view all the answers

    Which animals are examples of well-known spontaneous models mentioned in the text?

    <p>All of the above</p> Signup and view all the answers

    What is the focus of comparative genomics in the context of animal models?

    <p>To show genetic conservation between commonly used research species and humans</p> Signup and view all the answers

    What is the purpose of one-to-one modeling in biomedical research?

    <p>To seek similar phenotypes</p> Signup and view all the answers

    Study Notes

    Animal Models in Biomedical Research

    • Animal models used in research include vertebrate and invertebrate animals.
    • Invertebrate models like nematodes, fruit flies, and sea urchins have contributed to research in neurobiology, genetics, and development.
    • Models serve as surrogates and need not be identical to the subject being modeled.
    • Animal models can represent analogous or homologous processes, relating to genetic sequences, and have been primarily used for studying the human biological system.
    • The genetically manipulated mouse has been a primary driver of homologous modeling, but genetic manipulation in other species is advancing.
    • One-to-one modeling seeks similar phenotypes, while many-to-many modeling evaluates hierarchical levels of a process.
    • Diseases like cancer and obesity, which are complex and often polygenic, are commonly studied using many-to-many modeling.
    • Comparative genomics demonstrate genetic conservation between commonly used research species and humans.
    • Animal models can be spontaneous (normal animals with phenotypic similarity or those with spontaneous mutations) or induced (resulting from surgical, genetic, chemical, or other manipulation).
    • Spontaneous models include animals with naturally occurring mutations leading to disorders similar to those in humans.
    • Some well-known spontaneous models include rats with hereditary hyperbilirubinemia, mice with aganglionic megacolon, and dogs with Duchenne X-linked muscular dystrophy.
    • A significant limitation of spontaneous models is their unpredictable development and reliance on chance.

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    Test your knowledge of animal models in biomedical research with this quiz. Explore the use of vertebrate and invertebrate animals, genetic manipulation, disease modeling, and comparative genomics. Discover the significance of spontaneous and induced models in studying complex human disorders.

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