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Circadian Rhythm: The regular recurrence, in cycles of about 24 hours, of biological processes or activities, such as sensitivity to drugs and stimuli, hormone secretion, sleeping, and feeding.
 JoVE Genetics

Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures

1Department of Medical Specialties, Division of Endocrinology, Diabetes, Hypertension and Nutrition, Diabetes Center, University of Geneva Medical School, Institute of Genetics and Genomics in Geneva (iGE3), 2Population Epidemiology Unit (UEP), Community Medicine, Geneva University Hospital


JoVE 54673

 JoVE In-Press

Drosophila Preparation and Longitudinal Imaging of Heart Function In Vivo Using Optical Coherence Microscopy

1Bioengineering Program, Lehigh University, 2Center for Photonics and Nanoelectronics, Lehigh University, 3Department of Electrical and Computer Engineering, Lehigh University, 4State Key Laboratory of Software Engineering, Wuhan University, 5Genetics and Aging Research Unit, Department of Neurology, Massachusetts General Hospital and Harvard Medical School

Video Coming Soon

JoVE 55002

 JoVE Neuroscience

Vibratome Sectioning Mouse Retina to Prepare Photoreceptor Cultures

1Department of Genetics, UMR_S 968, Institut de la Vision, 2Department of Visual Information, UMR_S 968, Institut de la Vision, 3Exploratory Team, UMR_S 968, Institut de la Vision, 4Sorbonne Universités, Paris 06, UMR_S 968, Institut de la Vision, 5INSERM, U968, Institut de la Vision, 6CNRS, UMR_7210, Institut de la Vision


JoVE 51954

 Science Education: Essentials of Biology 2

Basic Mouse Care and Maintenance

JoVE Science Education

Mice (Mus musculus) are small rodents that breed and sexually mature quickly, making them perfectly suited to generating large animal colonies for biological research. As compared to other mammalian species, mice are simple and inexpensive to maintain in the laboratory. Nevertheless, mouse colonies do have specific husbandry needs that are critical to preserving animal health and safety as well as experimental reproducibility. This video demonstrates standard practices that ensure mice are treated as humanely as possible within the laboratory animal facility, or vivarium. The discussion begins by reviewing a typical mouse housing setup, consisting of a plastic cage equipped with a layer of soft bedding and nesting material. The preformulated food pellets (also known as chow) that comprise the typical mouse diet are also introduced. In order to facilitate experiments performed on mice, safe animal handling practices are demonstrated, including common restraint techniques like “scruffing,” and the strategies used by researchers to keep track of individual mice within the facility. Finally, experimental manipulations of mouse housing and diet are discussed, in addition to one of the most common applications of the scruffing technique — performing injections.

 JoVE In-Press

Manipulation of Epileptiform ECoGs and Sleep in Rats and Mice by Acupuncture

1Department of Sports, Health & Leisure, College of Tourism, Leisure and Sports, Aletheia University, Tainan Campus, 2Department of Neurology, Mackay Memorial Hospital and Mackay Medical College, 3Department of Veterinary Medicine, School of Veterinary Medicine, National Taiwan University, 4Graduate Institute of Brain & Mind Sciences, College of Medicine, National Taiwan University, 5Graduate Institute of Acupuncture Science, College of Chinese Medicine, China Medical University

Video Coming Soon

JoVE 54896

 JoVE Immunology and Infection

Large-Scale Purification of Porcine or Bovine Photoreceptor Outer Segments for Phagocytosis Assays on Retinal Pigment Epithelial Cells

1INSERM, U968, 2Sorbonne Universités, UPMC Paris 06, UMR_S 968, Institut de la Vision, 3CNRS, UMR_7210, 4Department of Biological Sciences, Center for Cancer, Genetic Diseases and Gene Regulation, Fordham University


JoVE 52100

 JoVE Neuroscience

A Simple One-step Dissection Protocol for Whole-mount Preparation of Adult Drosophila Brains

1Center for Metabolic and Degenerative Diseases, The Brown Foundation Institute of Molecular Medicine, Programs in Human and Molecular Genetics and Neuroscience, The Graduate School of Biomedical Sciences at Houston, The University of Texas Health Science Center at Houston, 2Department of Natural Sciences, University of Houston - Downtown, 3Department of Neurobiology and Anatomy, McGovern Medical School, The University of Texas Health Science Center at Houston


JoVE 55128

 JoVE Neuroscience

A Visual Description of the Dissection of the Cerebral Surface Vasculature and Associated Meninges and the Choroid Plexus from Rat Brain

1Division of Neurotoxicology, National Center for Toxicological Research, 2Division of Personalized Nutrition and Medicine, National Center for Toxicological Research, 3Office of Planning, Finance, and Information Technology, National Center for Toxicological Research


JoVE 4285

 JoVE Medicine

Experimental Glaucoma Induced by Ocular Injection of Magnetic Microspheres

1Ocular Biology and Therapeutics, University College London Institute of Ophthalmology, 2University College London Institue of Ophthalmology, 3Moorfields Eye Hospital, 4NIHR Biomedical Research Centre, Moorfields Eye Hospital, 5Schepens Eye Research Institute, Harvard Medical School, 6Hoffman-La Roche


JoVE 52400

 Science Education: Essentials of Biology 2

Development and Reproduction of the Laboratory Mouse

JoVE Science Education

Successful breeding of the laboratory mouse (Mus musculus) is critical to the establishment and maintenance of a productive animal colony. Additionally, mouse embryos are frequently studied to answer questions about developmental processes. A wide variety of genetic tools now exist for regulating gene expression during mouse embryonic and postnatal development, which can help scientists to understand more about heritable diseases affecting human development. This video provides an introduction to the reproduction and development of mice. In addition to clarifying the terminology used to describe developmental progression, the presentation reviews key stages of the mouse life cycle. First, major development events that take place in utero are described, with special attention given to the unique layout of early rodent embryos. Next, husbandry protocols are provided for postnatal mice, or pups, including the process of weaning, or removal of pups from their mother's cage. Since males and females must be separated at this stage to prevent unscheduled mating, the demonstration also reveals how to determine mouse sex. Subsequently, instructions are given for carrying out controlled mouse breeding, including screening for the copulatory plug, which is useful for precisely timed embryonic development. Finally, the video highlights strategies used to in

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