Here are some highlights from the September 2011 Issue of Journal of Visualized Experiments (JoVE).
Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction
1Division Woman and Child, Department Women, University Hospitals Leuven, 2The Ritchie Centre, Monash Institute of Medical Research, Department of Obstetrics and Gynaecology, Monash University, Victoria, Australia, 3Department of Cardiovascular Sciences, Katholieke Universiteit Leuven, 4Fetal and Perinatal Medicine Research Group, Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS), 5Maternal-Fetal Medicine Department, ICGON, Hospital Clínic, Universitat de Barcelona, Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER)
We describe examination of fetal cardiac function with contemporary functional fetal echocardiography and fetoplacental Doppler ultrasound using the VisualSonics VEVO 2100 microultrasound in a surgically induced model of intrauterine fetal growth restriction in a rabbit.
1Division of Neonatology, Department of Pediatrics, Leiden University Medical Center, 2Division of Fetal Therapy, Department of Obstetrics, Leiden University Medical Center, 3Department of Obstetrics, Leiden University Medical Center
Twin-to-twin transfusion syndrome and twin anemia polycythemia sequence are two potentially devastating problems in perinatal medicine. Both disorders occur only in monochorionic twins and result from unbalanced blood flow through placental vascular anastomoses. We provide a simple protocol to accurately evaluate the presence of vascular anastomoses using colored dye injection of placental vessels after birth.
Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas
1Division of Pediatric and Fetal Surgery, Department of Surgery, University of California, San Francisco, 2Department of Pathology, University of Alberta, 3Department of Obstretics and Gynecology, University of California, San Francisco, 4Department of Radiology, University of California, San Francisco
Vascular mapping of monochorionic (MC) twin placentas after birth provides a means for detailed demonstration of vascular connections between the twins’ circulations. Imbalance of these connections is thought to play a pivotal role in the development of complications of MC twinning including twin-to-twin transfusion syndrome.
High-throughput Flow Cytometry Cell-based Assay to Detect Antibodies to N-Methyl-D-aspartate Receptor or Dopamine-2 Receptor in Human Serum
1Institute for Neuroscience and Muscle Research, The Kids Research Institute at the Children's Hospital at Westmead, The University of Sydney, 2Flow Cytometry Centre, Westmead Millennium Institute for Medical Research
Over the recent years, live cell-based assays have been used successfully to detect antibodies against surface and conformational antigens. Here, we describe a method using high-throughput flow cytometry enabling the analysis of large cohorts of patients. Detection of novel antibodies will improve diagnosis and treatment of immune-mediated disorders.
Handwriting Analysis Indicates Spontaneous Dyskinesias in Neuroleptic Naïve Adolescents at High Risk for Psychosis
1Department of Psychology and Neuroscience, Center for Neuroscience, University of Colorado Boulder, 2NeuroScript LLC, 3Department of Psychiatry, University of California, San Diego
Handwriting analysis software significantly improves upon existing instruments measuring movement disorders. Individuals at risk for psychosis and healthy controls completed handwriting tasks to test for dyskinesia. Results suggest that youth at risk for psychosis exhibit dyskinesia and that handwriting analysis could significantly contribute to wider dissemination of early identification efforts
1Department of Cell and Molecular Biology, Feinberg School of Medicine, Northwestern University, 2IKERBASQUE, Basque Foundation for Science
Drosophila S2 cells and cultured neurons are great systems for imaging of motor-driven organelle transport in vivo. Here we describe detailed protocols for culturing both cell types, their imaging and analysis of transport.
Optimized System for Cerebral Perfusion Monitoring in the Rat Stroke Model of Intraluminal Middle Cerebral Artery Occlusion
Cerebral perfusion monitoring has been demonstrated to improve accuracy in ischemic stroke models. Technical difficulties often limit the use of this essential tool for cerebrovascular research. In this video, an optimized system is shown to obtain a single or multi-site hemodynamic monitoring during intraluminal middle cerebral artery occlusion in rats.
Expression of Functional Recombinant Hemagglutinin and Neuraminidase Proteins from the Novel H7N9 Influenza Virus Using the Baculovirus Expression System
1Department of Microbiology, Icahn School of Medicine at Mount Sinai, 2Graduate School of Biological Sciences, Icahn School of Medicine at Mount Sinai, 3Department of Medicine, Icahn School of Medicine at Mount Sinai
Here we describe a way to express correctly folded and functional influenza virus surface antigens derived from the novel Chinese H7N9 virus in insect cells. The technique can be adapted to express ectodomains of any viral or cellular surface proteins.
Enteric Bacterial Invasion Of Intestinal Epithelial Cells In Vitro Is Dramatically Enhanced Using a Vertical Diffusion Chamber Model
1Faculty of Infectious & Tropical Diseases, London School of Hygiene & Tropical Medicine
Performing cell culture assays for investigating bacterial adhesion and invasion under aerobic conditions is usually unrepresentative of the in vivo environment. A Vertical Diffusion Chamber model allows study of interactions of the human pathogen Campylobacter jejuni with intestinal epithelial cells under more in vivo-like conditions, resulting in enhanced bacterial invasion.