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22 ARTICLES PUBLISHED IN JoVE

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Biology

Harvesting and Preparing Drosophila Embryos for Electrophysiological Recording and Other Procedures
David E. Featherstone 1, Kaiyun Chen 1, Kendal Broadie 2
1Department of Biological Sciences, University of Illinois, 2Department of Biological Sciences, Vanderbilt University

This technique exposes the Drosophila embryonic neuromusculature for immunohistochemistry or electrophysiological recording. It is useful for studying early events in neuromuscular development or performing electrophysiology in mutants that cannot hatch.

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Biology

Electrophysiological Recording in the Drosophila Embryo
Kaiyun Chen 1, David E. Featherstone 1, Kendal Broadie 2
1Department of Biological Sciences, University of Illinois, 2Department of Biological Sciences, Vanderbilt University

Electrophysiological recordings from Drosophila embryos allow analyses of developing muscle and neuron electrical properties, as well as characterization of functional synaptogenesis at the glutamatergic neuromuscular junction and central cholinergic and GABAergic synapses.

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Biology

Fabrication and Operation of an Oxygen Insert for Adherent Cellular Cultures
Shawn Oppegard 1, Elly Sinkala 1, David Eddington 1
1Bioengineering, University of Illinois

Fabrication and validation of an add-on platform that offers enhanced control over the spatial and temporal oxygenation in a 6-well plate. The device is adaptable to a number of culture systems and can be used to investigate the effects of oxygen on wound healing.

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Biology

Rapid Homogeneous Detection of Biological Assays Using Magnetic Modulation Biosensing System
Amos Danielli 1,2, Noga Porat 3, Marcelo Ehrlich 4, Ady Arie 1
1Department of Physical Electronics, Faculty of Engineering, Tel Aviv University, 2Department of Biomedical Engineering, Washington University in St. Louis, 3Department of Biological Sciences, University of Illinois, 4Department of Cell Research and Immunology, Tel Aviv University

Magnetic modulation biosensing system is utilized to rapidly, sensitively and simply detect biological assays, such as DNA molecules and proteins.

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Neuroscience

Brain Imaging Investigation of the Neural Correlates of Observing Virtual Social Interactions
Keen Sung 1, Sanda Dolcos 2, Sophie Flor-Henry 3, Crystal Zhou 3, Claudia Gasior 4, Jennifer Argo 5, Florin Dolcos 2,6,7
1Department of Computing Science, University of Alberta, 2Department of Psychology, University of Illinois, 3Centre for Neuroscience, University of Alberta, 4Department of Psychology, University of Alberta, 5Department of Marketing, Business Economics, and Law, University of Alberta, 6Neuroscience Program, University of Illinois at Urbana-Champaign, 7Beckman Institute, University of Illinois at Urbana-Champaign

This article demonstrates an experimental design in which whole-body animated characters are used in conjunction with functional magnetic resonance imaging (fMRI) to investigate the neural correlates of observing virtual social interactions.

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Neuroscience

Brain Imaging Investigation of the Neural Correlates of Emotional Autobiographical Recollection
Ekaterina Denkova 1, Trisha Chakrabarty 1, Sanda Dolcos 1,2, Florin Dolcos 1,2,3,4
1Department of Psychiatry, University of Alberta, Edmonton, 2Psychology Department, University of Illinois, Urbana-Champaign, 3Neuroscience Program, University of Illinois, Urbana-Champaign, 4Beckman Institute for Advanced Science & Technology, University of Illinois, Urbana-Champaign

We present a protocol that allows investigation of the neural correlates of recollecting emotional autobiographical memories, using functional magnetic resonance imaging. This protocol can be used with both healthy and clinical participants.

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Neuroscience

Brain Imaging Investigation of the Neural Correlates of Emotion Regulation
Sanda Dolcos 1, Keen Sung 2, Ekaterina Denkova 3, Roger A. Dixon 4,5, Florin Dolcos 1,6,7
1Department of Psychology, University of Illinois, Urbana-Champaign, 2Department of Computing Science, University of Alberta, Edmonton, 3Department of Psychiatry, University of Alberta, Edmonton, 4Department of Psychology, University of Alberta, Edmonton, 5Centre for Neuroscience, University of Alberta, Edmonton, 6Neuroscience Program, University of Illinois, Urbana-Champaign, 7Beckman Institute, University of Illinois, Urbana-Champaign

We present a protocol that allows investigation of the neural correlates of deliberate and automatic emotion regulation, using functional magnetic resonance imaging. This protocol can be used in healthy participants, both young and older, as well as in clinical patients.

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Neuroscience

Brain Imaging Investigation of the Memory-Enhancing Effect of Emotion
Andrea Shafer 1, Alexandru Iordan 2, Roberto Cabeza 3, Florin Dolcos 1,4
1Centre for Neuroscience, University of Alberta, 2Neuroscience Program, University of Illinois, Urbana-Champaign, 3Center for Cognitive Neuroscience, Duke University, 4Psychology Department, Neuroscience Program, & Beckman Institute, University of Illinois, Urbana-Champaign

We present a protocol that uses functional magnetic resonance imaging to investigate the neural correlates of the memory-enhancing effect of emotion. This protocol allows identification of brain activity specifically linked to memory-related processing, contrary to more general perceptual processing, and can be used with healthy and clinical populations.

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Neuroscience

Brain Imaging Investigation of the Impairing Effect of Emotion on Cognition
Gloria Wong 1,2, Sanda Dolcos 1,3, Ekaterina Denkova 1, Rajendra Morey 4,5,6, Lihong Wang 4,5, Gregory McCarthy 6,7, Florin Dolcos 1,2,3,8,9
1Department of Psychiatry, University of Alberta, 2Centre for Neuroscience, University of Alberta, 3Department of Psychology, University of Illinois, 4Brain Imaging and Analysis Center, Duke University , 5Department of Psychiatry and Behavioral Sciences, Duke University , 6Mid-Atlantic Mental Illness Research Education and Clinical Center, VA Medical Center, 7Department of Psychology, Yale University, 8Neuroscience Program, University of Illinois, 9Beckman Institute for Advanced Science & Technology, University of Illinois

We present a protocol that allows investigation of the neural mechanisms mediating the detrimental impact of emotion on cognition, using functional magnetic resonance imaging. This protocol can be used with both healthy and clinical participants.

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Bioengineering

Specimen Preparation, Imaging, and Analysis Protocols for Knife-edge Scanning Microscopy
Yoonsuck Choe 1, David Mayerich 2, Jaerock Kwon 3, Daniel E. Miller 1, Chul Sung 1, Ji Ryang Chung 1, Todd Huffman 4, John Keyser 1, Louise C. Abbott 5
1Department of Computer Science and Engineering, Texas A&M University, 2Beckman Institute for Advanced Science and Technology, University of Illinois, 3Department of Electrical and Computer Engineering, Kettering University, 43Scan, 5Department of Veterinary Integrative Biosciences, Texas A&M University

The full process from brain specimen preparation to serial sectioning imaging using the Knife-Edge Scanning Microscope, to data visualization and analysis is described. This technique is currently used to acquire mouse brain data, but it is applicable to other organs, other species.

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Bioengineering

Micropipette Aspiration of Substrate-attached Cells to Estimate Cell Stiffness
Myung-Jin Oh 1, Frank Kuhr 1, Fitzroy Byfield 2, Irena Levitan 1
1Section of Respiratory, Critical Care and Sleep Medicine, Department of Medicine, University of Illinois, 2Institute for Medicine and Engineering, University of Pennsylvania

Here we describe a quick and simple method to measure cell stiffness. The general principle of this approach is to measure membrane deformation in response to well-defined negative pressure applied through a micropipette to the cell surface. This method provides a powerful tool to study biomechanical properties of substrate-attached cells.

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Neuroscience

A Comprehensive Protocol for Manual Segmentation of the Medial Temporal Lobe Structures
Matthew Moore *1, Yifan Hu *1, Sarah Woo 1, Dylan O'Hearn 1, Alexandru D. Iordan 2,3, Sanda Dolcos 1, Florin Dolcos 1,2,3
1Psychology Department, University of Illinois Urbana-Champaign, 2Neuroscience Program, University of Illinois Urbana-Champaign, 3Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign

The present work provides a comprehensive set of guidelines for manually tracing the medial temporal lobe (MTL) structures. This protocol can be applied to research involving structural and/or combined structural-functional magnetic resonance imaging (MRI) investigations of the MTL, in both healthy and clinical groups.

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Environment

Measuring Rates of Herbicide Metabolism in Dicot Weeds with an Excised Leaf Assay
Rong Ma 1, Joshua J. Skelton 1, Dean E. Riechers 1
1Department of Crop Sciences, University of Illinois

This manuscript describes how herbicide metabolism rates can be effectively quantified with excised leaves from a dicot weed, thereby reducing variability and removing any possible confounding effects of herbicide uptake or translocation typically observed in whole-plant assays.

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Bioengineering

Image-guided, Laser-based Fabrication of Vascular-derived Microfluidic Networks
Keely A. Heintz 1, David Mayerich 2, John H. Slater 1,3
1Department of Biomedical Engineering, University of Delaware, 2Department of Electrical and Computer Engineering, University of Houston, 3Delaware Biotechnology Institute

This protocol outlines the implementation of image-guided, laser-based hydrogel degradation to fabricate vascular-derived, biomimetic microfluidic networks embedded in poly(ethylene glycol) diacrylate (PEGDA) hydrogels. These biomimetic microfluidic systems may be useful for tissue engineering applications, generation of in vitro disease models, and fabrication of advanced "on-a-chip" devices.

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Behavior

Probing the Limits of Egg Recognition Using Egg Rejection Experiments Along Phenotypic Gradients
Lindsay Canniff 1, Miri Dainson 2, Analía V. López 3, Mark E. Hauber 2, Tomáš Grim 4, Peter Samaš 5, Daniel Hanley 1
1Department of Biology, Long Island University-Post, 2Department of Animal Biology, School of Integrative Biology, University of Illinois, 3Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 4Department of Zoology and Laboratory of Ornithology, Palacký University, 5Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic

This protocol provides guidelines for running egg rejection experiments: outlining techniques for painting experimental egg models to emulate the colors of natural bird eggs, conducting fieldwork, and analyzing the collected data. This protocol provides a uniform method for conducting comparable egg rejection experiments.

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Chemistry

Methionine Functionalized Biocompatible Block Copolymers for Targeted Plasmid DNA Delivery
Yang Wu *1, Wei Zhang *2, Jian Zhang 2, Zhi-Xiang Mao 3, Li Ding 2, Hao Li 3, Rong Ma 1, Jin-Hai Tang 2
1Research Center of Clinical Oncology, Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research & Nanjing Medical University Affiliated Cancer Hospital, 2Department of General Surgery, The First Affiliated Hospital with Nanjing Medical University, 3School of Clinical Medicine, Xuzhou Medical University

This work presents the preparation of methionine functionalized biocompatible block copolymers (mBG) via the reversible addition-fragmentation chain transfer (RAFT) method. The plasmid DNA complexing ability of the obtained mBG and their transfection efficiency were also investigated. The RAFT method is very beneficial for polymerizing monomers containing special functional groups.

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Cancer Research

Development and Angiographic Use of the Rabbit VX2 Model for Liver Cancer
Ramzy C. Khabbaz 1,2, Yu-Hui Huang 1,2, Alexandra A. Smith 3, Kelly D. Garcia 1, R. Peter Lokken 1, Ron C. Gaba 1
1Department of Radiology, University of Illinois, 2College of Medicine, University of Illinois, 3Department of Biological Resources Laboratory, University of Illinois

The goal of this article is to provide a primer for the development and use of the VX2 carcinoma rabbit model for liver cancer.

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Medicine

Protocol and Guidelines for Point-of-Care Lung Ultrasound in Diagnosing Neonatal Pulmonary Diseases Based on International Expert Consensus
Jing Liu 1,2, Roberto Copetti 3, Erich Sorantin 4, Jovan Lovrenski 5, Javier Rodriguez-Fanjul 6, Dalibor Kurepa 7, Xing Feng 8, Luigi Cattaross 9, Huayan Zhang 10,11, Misun Hwang 12, Tsu F. Yeh 13,14, Yisrael Lipener 7, Abhay Lodha 15, Jia-Qin Wang 16, Hai-Ying Cao 2,17, Cai-Bao Hu 2,18, Guo-Rong Lyu 19, Xin-Ru Qiu 1,2, Li-Qun Jia 20, Xiao-Man Wang 20, Xiao-Ling Ren 1,2, Jiu-Ye Guo 1,2, Yue-Qiao Gao 1,2, Jian-Jun Li 1,2, Ying Liu 1,2, Wei Fu 1,2, Yan Wang 21, Zu-Lin Lu 1,2, Hua-Wei Wang 8, Li-Li Shang 22
1Department of Neonatology and NICU, Beijing Chaoyang District Maternal and Child Healthcare Hospital, 2The Neonatal Lung Ultrasound Training Base, Chinese College of Critical Ultrasound, 3Emergency Department, Cattinara University Hospital, 4Division of Pediatric Radiology, Department of Radiology, Medical University Graz, 5Faculty of Medicine, University of Novi Sad, Radiology Department, Institute for Children and Adolescents Health Care of Vojvodina, 6Pediatric Intensive Care Unit, Pediatric Service Hospital Joan XXIII Tarragona, University Rovira i Virgil, 7Division of Neonatal-Perinatal Medicine, Cohen Children's Medical Center, 8Department of Neonatology, Children's Hospital of Soochow University, 9Department of Neonatology, Udine University Hospital, 10Center for Newborn Care, Guangzhou Women and Children's Medical Center, 11Division of Neonatology, Children's Hospital of Philadelphia, 12Department of Radiology, Children's Hospital of Philadelphia, 13Division of Neonatology and NICU, Cook County Children's Hospital, University of Illinois, 14Division of Neonatology, Department of Pediatrics, Taipei Medical University, 15Department of Pediatrics and Community Health Sciences, University of Calgary, 16Department of Pediatrics, The Third Affiliated Hospital of Xinxiang Medical University, 17Department of Ultrasound, GE Healthcare, 18Intensive Care Unit, Zhejiang Hospital, 19Collaborative Innovation Center for Maternal and Infant Health Service Application Technology, Quanzhou Medical College, 20Department of Ultrasound, Beijing Children's Hospital Affiliated with Capital Medical University, 21Department of Neonatology and NICU, Tai'an City Central Hospital of Shandong Province, 22Department of Intensive Care Unit, The Second Affiliated Hospital of Heilongjiang University of Chinese Medicine

Lung ultrasound is a noninvasive and valuable tool for bedside evaluation of neonatal lung diseases. However, a relative lack of reference standards, protocols and guidelines may limit its application. Here, we aim to develop a standardized neonatal lung ultrasound diagnostic protocol to be used in clinical decision-making.

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Immunology and Infection

Electrophysiological Recordings of Single-cell Ion Currents Under Well-defined Shear Stress
Ibra S. Fancher 1, Irena Levitan 1
1Department of Medicine, Division of Pulmonary, Critical Care, Sleep and Allergy, University of Illinois at Chicago

The goal of this protocol is to describe a modified parallel plate flow chamber for use in investigating real time activation of mechanosensitive ion channels by shear stress.

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Medicine

International Expert Consensus and Recommendations for Neonatal Pneumothorax Ultrasound Diagnosis and Ultrasound-guided Thoracentesis Procedure
Jing Liu 1,2, Dalibor Kurepa 3, Francesco Feletti 4,5, Almudena Alonso-Ojembarrena 6, Jovan Lovrenski 7, Roberto Copetti 8, Erich Sorantin 9, Javier Rodriguez-Fanjul 10, Karishma Katti 3, Andrea Aliverti 4, Huayan Zhang 11,12, Misun Hwang 13, Tsu F. Yeh 14, Cai-Bao Hu 15, Xing Feng 16, Ru-Xin Qiu 1,2, Jing-Han Chi 17, Li-Li Shang 18, Guo-Rong Lyu 19, Shao-Zheng He 20, Yan-Fen Chai 21, Zhan-Jun Qiu 22, Hai-Ying Cao 2,23, Yue-Qiao Gao 1,2, Xiao-Ling Ren 1,2, Guo Guo 1,24, Li Zhang 1,2, Ying Liu 1,2, Wei Fu 1,2, Zu-Lin Lu 1,2, Hong-Lei Li 1,2
1Department of Neonatology and NICU, Beijing Chaoyang District Maternal and Child Healthcare Hospital, 2The National Neonatal Lung Ultrasound Training Base, 3Division of Neonatal-Perinatal Medicine, Cohen Children's Medical Center, 4Department of Electronics, Information and Bioengineering, Politecnico di Milano, 5Dipartimento di Diagnostica per Immagini, Ausl della Romagna, S. Maria delle Croci Hospital, 6Neonatal Intensive Care Unit, Puerta del Mar University Hospital, 7Faculty of Medicine, University of Novi Sad, Serbia, Institute for Children and Adolescents Health Care of Vojvodina, 8Emergency Department, University Hospital of Cattinara, 9Division of Pediatric Radiology, Department of Radiology, Medical University Graz, 10Pediatric Intensive Care Unit, Pediatric Service Hospital Joan XXIII Tarragona, University Rovira i Virgil, 11Center for Newborn Care, Guangzhou Women and Children's Medical Center, 12Division of Neonatology, Children's Hospital of Philadelphia, 13Section of Neonatal Imaging, Department of Radiology, Children's Hospital of Philadelphia, 14Maternal Child Health Research institute, Taipei Medical University and China Medical University, 15Intensive Care Unit, Zhejiang Hospital, 16Department of Neonatology, Children's Hospital of Soochow University, 17Department of Neonatology and NICU, Bayi Children's Hospital Affiliated to the Seventh Medical Center of Chinese PLA General Hospital, 18Intensive Care Unit, Second Affiliated Hospital of Heilongjiang University of Chinese Medicine, 19Collaborative Innovation Center for Maternal and Infant Health Service Application Technology, Quanzhou Medical College, 20Department of Ultrasound, Second Affiliated Hospital of Fujian Medical University, 21Department of Emergency Medicine, Tianjin Medical University General Hospital, 22Department of Emergency and Critical Care Medicine, Affiliated Hospital of Traditional Chinese Medicine, 23Department of Ultrasound, GE Healthcare, 24The Neonatal Intensive Care Unit, Fifth Medical Center of Chinese PLA General Hospital

Pneumothorax is a common emergency and critical disease in newborn infants that needs rapid, clear diagnosis and timely treatment. Diagnosis and treatment based on chest X-rays are associated with delayed management and radiation damage. Lung ultrasound (US) provides useful guidance for rapid, accurate diagnosis and the precise thoracentesis of pneumothorax.

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Biology

Preparation of Virus-Enriched Inoculum for Oral Infection of Honey Bees (Apis mellifera)
Edward M. Hsieh 1, Jimena Carrillo-Tripp 2, Adam G. Dolezal 1
1Department of Entomology, University of Illinois, 2Department of Microbiology, Center for Scientific Research and Higher Education of Ensenada (CICESE)

Here we describe two protocols: first to propagate, extract, purify, and quantify large quantities of honey bee non-enveloped virus particles, including a method for removing honey bee pupae and second to test the effects of viral infection using a highly repeatable, high-throughput cage bioassay.

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Bioengineering

DNA Tension Probes to Map the Transient Piconewton Receptor Forces by Immune Cells
Rong Ma 1, Anna V. Kellner 2, Yuesong Hu 1, Brendan R. Deal 1, Aaron T. Blanchard 2, Khalid Salaita 1,2
1Department of Chemistry, Emory University, 2Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University

This paper describes a detailed protocol for using DNA-based tension probes to image the receptor forces applied by immune cells. This approach can map receptor forces >4.7pN in real-time and can integrate forces over time.

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