The Journal of Visualized Experiments (JoVE) is a peer reviewed, PubMed-indexed video journal. Our mission is to increase the productivity of scientific research.

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The use of SC1 (Pluripotin) to Support mESC Self-renewal in the Absence of LIF


JoVE 1550 11/18/2009

1Research and Development, Stemgent, 2Product Marketing, Stemgent

SC1 functions through dual inhibition of Ras- GAP and ERK1. We tested the function of SC1 in supporting mouse ES cell self-renewal in the absence of LIF and showed that SC1 is able to maintain self-renewal of mouse ES cell cultures.

 

In vivo Quantification of G Protein Coupled Receptor Interactions using Spectrally Resolved Two-photon Microscopy


JoVE 2247 1/19/2011

1Department of Physics, University of Wisconsin - Milwaukee, 2Department of Biological Sciences, University of Wisconsin - Milwaukee

By employing a spectrally resolved two-photon microscopy imaging system, pixel-level maps of Förster Resonance Energy Transfer (FRET) efficiencies are obtained for cells expressing membrane receptors hypothesized to form homo-oligomeric complexes. From the FRET efficiency maps, we are able to estimate stoichiometric information about the oligomer complex under study.

 

Preparation of Acute Hippocampal Slices from Rats and Transgenic Mice for the Study of Synaptic Alterations during Aging and Amyloid Pathology


JoVE 2330 3/23/2011

1Graduate Center for Gerontology, University of Kentucky College of Public Health, 2Department of Molecular and Biomedical Pharmacology, University of Kentucky College of Medicine, 3Sanders-Brown Center on Aging, University of Kentucky College of Medicine

This article outlines procedures for preparing hippocampal slices from rats and transgenic mice for the study of synaptic alterations associated with brain aging and age-related neurodegenerative diseases, such as Alzheimer’s disease.

 

A Technique for Serial Collection of Cerebrospinal Fluid from the Cisterna Magna in Mouse


JoVE 960 11/10/2008

Department of Pathology, Columbia University

Transgenic (Tg) mouse models of AD provide an excellent opportunity to investigate how and why Aβ or tau levels in CSF change as the disease progresses in human patients. Here, we demonstrate a refined cisterna magna puncture technique for serial CSF sampling from the mouse.

 

In utero Electroporation followed by Primary Neuronal Culture for Studying Gene Function in Subset of Cortical Neurons


JoVE 2103 10/08/2010

1Center for Neurologic Diseases, Brigham and Woman's Hospital and Harvard Medical School, 2Department of Physiology and Neurobiology, University of Connecticut

In utero electroporation is a valuable method for transfecting neuronal progenitor cells in vivo. Depending upon the placement of the electrodes and the developmental timepoint of electroporation, certain subsets of cortical cells can be targeted. Targeted cells can then be analyzed in vivo or in vitro for effects of genetic alteration.

 

Gene Transfer for Ischemic Heart Failure in a Preclinical Model


JoVE 2778 5/15/2011

Cardiovascular Research Center, Mount Sinai School of Medicine

A method of gene transfer for the treatment of ischemic heart failure is described using a swine model of myocardial infarction. Our simple and reproducible method enables us to readily evaluate the efficacy of various gene transfers with a very simple and reproducible way.

 

Detection of Neuritic Plaques in Alzheimer's Disease Mouse Model


JoVE 2831 7/26/2011

Department of Neuroscience, The University of British Columbia

One of the pathological characteristics of AD is the formation of Amyloid β protein positive neuritic plaques. In this protocol we describe two methods to detect neuritic plaques in transgenic AD model mice: immunohistochemical detection using the ABC and DAB method and fluorescent detection using thioflavin S staining method.

 

Time-lapse Imaging of Mitosis After siRNA Transfection


JoVE 1878 6/06/2010

1Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah, 2Fluorescence Microscopy Core Facility, University of Utah

Here we describe a basic protocol to image and quantify the mitotic timing of live mammalian tissue culture cells after siRNA transfection.

 

SDS-PAGE/Immunoblot Detection of Aβ Multimers in Human Cortical Tissue Homogenates using Antigen-Epitope Retrieval


JoVE 1916 4/23/2010

1Yerkes National Primate Research Center, Emory University, 2Department of Neurology, Institute of Clinical Medicine, Tsukuba University, 3Department of Pathology, New York University School of Medicine, 4Department of Neurology, Emory University

We describe a technique for the preparation of clarified human cortical homogenates, protein separation by SDS-PAGE, antigen retrieval and immunoblotting with an antibody to the Aβ peptide. Using this protocol, we consistently detect monomeric and multimeric Aβ in cortical tissue from humans with Alzheimer's pathology.

 

Coherence between Brain Cortical Function and Neurocognitive Performance during Changed Gravity Conditions


JoVE 2670 5/23/2011

1Institute of Movement and Neurosciences, German Sport University Cologne, 2Deptartment of Surgical Skills, University of Toronto, 3School of Human Movement Studies, Institute of Health and Biomedical Innovation, Queensland University of Technology, 4Brain Products GmbH, Scientific Support, Gilching, Germany

The effect of weightlessness and hypergravity on both hemodynamic and electrophysiological processes in the brain is going to be followed during parabolic flight by EEG and NIRS techniques. A feasibility study of a more complex experiment, which is planned to carry out during medium- and long-term space flight.

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