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Rats, Nude: A mutant strain of Rattus norvegicus without a thymus and with depressed or absent T-cell function. This strain of rats may have a small amount of hair at times, but then lose it.
 Science Education: Essentials of Lab Animal Research

Basic Care Procedures

JoVE Science Education

Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN

Mice and rats account for over 90% of the animals used for biomedical research. The proper care of these research animals is critical to the outcome of experiments. There are general procedures that apply to the majority of these mice and rats, but some of the animals, such as the immunocompromised ones, require additional steps to be taken to sustain them for experimentation. Commonly used immunocompromised mice include those that have naturally occurred in inbred mice and those that have been created through genetic engineering. The first immunocompromised mice used in research were "nude" mice. The BALB/c Nude (nu) mouse was discovered in 1966, within a BALB/c colony that was producing mice lacking both hair and a thymus. These athymic mice have an inhibited immune system that is devoid of T cells. The value of this animal was soon discovered for the use in studies of microbial infections, immune deficiencies, and autoimmunity. Although not as commonly used as the nude mouse, there is also a nude rat. The nude rat is T cell deficient and shows depleted cell populations in thymus-dependent areas of peripheral lymphoid organs. Another naturally occurring immune deficient mouse is the severe comb

 JoVE Medicine

Automated Measurement of Microcirculatory Blood Flow Velocity in Pulmonary Metastases of Rats

1Division of Plastic, Maxillofacial, and Oral Surgery, Duke University Medical Center, 2Department of Radiation Oncology, Duke University Medical Center, 3Department of Cardiology, University of Colorado Denver, 4Department of Physical Chemistry, University of Mainz


JoVE 51630

 Science Education: Essentials of Lab Animal Research

Rodent Handling and Restraint Techniques

JoVE Science Education

Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN 

It has been demonstrated that even minimal handling of mice and rats is stressful to the animals. Handling for cage changing and other noninvasive procedures causes an increase in heart rate, blood pressure, and other physiological parameters, such as serum corticosterone levels. Fluctuations can continue for up to several hours. The methods of restraint required for injections and blood withdrawals also cause physiological changes that can potentially affect scientific data. Training in the proper handling of mice and rats is required to minimize the effects to the animals.1 Mice and rats can be restrained manually with restraint devices, or with chemical agents. Manual methods and the use of restraint devices are covered in this manuscript. All restraint methods include the process of lifting the animals from their home cage.

 JoVE In-Press

Creation and Transplantation of an Adipose-derived Stem Cell (ASC) Sheet in a Diabetic Wound-healing Model

1Diabetic Center, Tokyo Women's Medical University School of Medicine, 2The Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, 3The Department of Anatomy and Developmental Biology, Tokyo Women's Medical University School of Medicine

Video Coming Soon

JoVE 54539

 JoVE Bioengineering

Bioluminescence Imaging for Assessment of Immune Responses Following Implantation of Engineered Heart Tissue (EHT)

1Transplant and Stem Cell Immunobiology Lab (TSI) and CVRC, University Hospital Hamburg, University Heart Center Hamburg, 2Department of Experimental and Clinical Pharmacology and Toxicology, University Heart Center Hamburg, 3CT Surgery, Stanford University School of Medicine


JoVE 2605

 Science Education: Essentials of Lab Animal Research

Compound Administration I

JoVE Science Education

Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN

As many research protocols require that a substance be injected into an animal, the route of delivery and the amount of the substance must be accurately determined. There are several routes of administration available in the mouse and rat. Which route to use is determined by several factors of the substance to be injected: the pH of the solution, the volume required for the desired dosage, and the viscosity of the solution. Severe tissue damage can occur if a substance is administered incorrectly. This video looks at the various restraint methods and technical details for the most commonly used injection routes.

 JoVE Medicine

Renal Capsule Xenografting and Subcutaneous Pellet Implantation for the Evaluation of Prostate Carcinogenesis and Benign Prostatic Hyperplasia

1Department of Urology, University of Wisconsin-Madison, 2Medical Scientist (MD/PhD) Training Program, University of Rochester School of Medicine & Dentistry, 3Molecular and Environmental Toxicology Center, University of Wisconsin-Madison


JoVE 50574

 JoVE Bioengineering

A Full Skin Defect Model to Evaluate Vascularization of Biomaterials In Vivo

1Department of Plastic Surgery and Hand Surgery, University Hospital rechts der Isar, Technische Universität München, 2Institute for Signal Processing, University of Lübeck, 3Department of Plastic Surgery and Hand Surgery, University Hospital Zürich, 4FONDAP Center for Genome Regulation, Facultad de Ciencias, Universidad de Chile


JoVE 51428

 JoVE Medicine

Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers

1Thayer School of Engineering, Dartmouth College, 2Department of Physics and Astronomy, Dartmouth College, 3Darmouth Medical School, Dartmouth College, 4School of Computer Science, University of Birmingham


JoVE 4050

 JoVE Bioengineering

Gene Transfection toward Spheroid Cells on Micropatterned Culture Plates for Genetically-modified Cell Transplantation

1Graduate School of Medicine, Laboratory of Clinical Biotechnology, The University of Tokyo, 2Graduate School of Engineering, Department of Materials Engineering, The University of Tokyo, 3Graduate School of Engineering, Department of Bioengineering, The University of Tokyo


JoVE 52384

 JoVE Medicine

Human Internal Mammary Artery (IMA) Transplantation and Stenting: A Human Model to Study the Development of In-Stent Restenosis

1University Heart Center Hamburg, TSI-Lab, Germany, 2Cardiovascular Research Center, University of Hamburg, 3Department of Medicine, Cardiology Division, Pulmonary Hypertension Program, University of Alberta, 4Department of Medicine, Stanford University School of Medicine, 5Department of Biomedical Sciences, Institute of Physiology, Pathophysiology, and Biophysics, University of Veterinary Medicine, Vienna, 6Translumina GmbH, Hechingen, 7Department of Cardiothoracic Surgery, Stanford University School of Medicine


JoVE 3663

 JoVE Medicine

Transplantation into the Anterior Chamber of the Eye for Longitudinal, Non-invasive In vivo Imaging with Single-cell Resolution in Real-time

1Diabetes Research Institute, University of Miami Miller School of Medicine, 2Department of Surgery, University of Miami Miller School of Medicine, 3Department of Medicine, University of Miami Miller School of Medicine, 4Department of Physiology & Biophysics, University of Miami Miller School of Medicine, 5The Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska Institutet


JoVE 50466

 JoVE Bioengineering

Fabrication of Micro-tissues using Modules of Collagen Gel Containing Cells

1Institute of Biomaterials and Biomedical Engineering / Department of Chemical Engineering and Applied Chemistry, University of Toronto, 2Institute of Biomaterials and Biomedical Engineering, University of Toronto


JoVE 2177

 JoVE Medicine

Transposon Mediated Integration of Plasmid DNA into the Subventricular Zone of Neonatal Mice to Generate Novel Models of Glioblastoma

1Department of Neurosurgery, University of Michigan School of Medicine, 2Department of Pediatrics, Division of Hematology-Oncology, University of Michigan School of Medicine, 3Department of Cell and Developmental Biology, University of Michigan


JoVE 52443

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 JoVE Immunology and Infection

Optimized Protocols for Mycobacterium leprae Strain Management: Frozen Stock Preservation and Maintenance in Athymic Nude Mice

1Department of Pathology, Instituto Lauro de Souza Lima (ILSL), 2Laboratory Animal House, Instituto Lauro de Souza Lima (ILSL), 3Department of Microbiology, Instituto Lauro de Souza Lima (ILSL), 4Department of Pharmacology, Instituto Lauro de Souza Lima (ILSL)


JoVE 50620

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 JoVE Medicine

Generation of Organ-conditioned Media and Applications for Studying Organ-specific Influences on Breast Cancer Metastatic Behavior

1London Regional Cancer Program, London Health Sciences Centre, 2Department of Anatomy & Cell Biology, Schulich School of Medicine & Dentistry, Western University, 3Department of Biochemistry, Schulich School of Medicine & Dentistry, Western University, 4Department of Oncology, Schulich School of Medicine & Dentistry, Western University, 5Lawson Health Research Institute


JoVE 54037

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 JoVE Medicine

Diffuse Optical Spectroscopy for the Quantitative Assessment of Acute Ionizing Radiation Induced Skin Toxicity Using a Mouse Model

1Department of Radiation Oncology, University of Toronto, 2Department of Physics, Ryerson University, 3Department of Medical Biophysics, University of Toronto, 4Ontario Cancer Institute / Campbell Family Institute for Cancer Research


JoVE 53573

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 JoVE Neuroscience

Simultaneous Detection of c-Fos Activation from Mesolimbic and Mesocortical Dopamine Reward Sites Following Naive Sugar and Fat Ingestion in Rats

1Behavioral and Cognitive Neuroscience Cluster, Psychology Doctoral Program, The Graduate Center, CUNY, New York, NY, 2Department of Psychology, Queens College, CUNY, Flushing, NY, 3Behavioral and Cognitive Neuroscience Cluster, Psychology Doctoral Program, The Graduate Center, CUNY, Flushing, NY


JoVE 53897

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