The art and science of studying, performing research on, preventing, diagnosing, and treating disease, as well as the maintenance of health.
1Nanomedicine Research Center, Department of Neurosurgery, Cedars-Sinai Medical Center
An example of a nano drug based on polymalic acid is presented towards the rational design of personalized medicine that is applicable to cancer. It describes the synthesis of a nano drug to treat Her2-positive human breast cancer in a nude mouse.
Published June 13, 2014. Keywords: Chemistry, Cancer treatment, personalized medicine, polymalic acid, nanodrug, biopolymer, targeting, host compatibility, biodegradability
1Division of Computer-assisted Restorative Dentistry, Center of Dental Medicine, University of Zürich
Accuracy is a major demand in dental medicine. To verify accuracy, reference scanners are needed. This article presents a new reference scanner with an adjusted scanning method to acquire a broad variety of dental morphologies with high trueness and precision.
Published April 29, 2014. Keywords: Medicine, Laboratories, Dental, Calibration, Technology, Dental impression, Accuracy, Trueness, Precision, Full arch scan, Abrasion
German biophysicist Erwin Neher shared the 1991 Nobel Prize in Physiology or Medicine with Bert Sakmann for their pioneering work measuring the activity of single ion channels in cells.
Published November 11, 2009. Keywords: Cellular Biology, electrophysiology, Nobel Prize, Nobel Laureate Meeting, Physiology or Medicine, 1991, single ion channels, patch- clamp
Swiss microbial geneticist, Werner Arber shared the 1978 Nobel Prize in Physiology or Medicine with Hamilton Smith and Daniel Nathans for their discovery of restriction endonucleases. Arber found that viral DNA introduced into a non-specific bacterial host was changed, while host DNA was protected by methylation. He theorized that a microbial enzyme cut the DNA into smaller pieces, while at the same time, the methylated host DNA was protected from its own enzymes. Later work done by Nathans and Smith validated his theory, which laid the foundation for recombinant DNA technology.
Published March 10, 2010. Keywords: Microbiology, DNA methylation, host-restriction, restriction enzymes, endonuclease, epigenetics, R-M systems, lambda, bacteriophage
1Chemical and Physical Biology Program, Vanderbilt University, 2Department of Physical Medicine and Rehabilitation, Vanderbilt University School of Medicine, 3Radiology & Radiological Sciences, Vanderbilt University Medical Center, 4Department of Pharmacology, Vanderbilt University
The method presented here uses 18F-Fluorodeoxyglucose (18F-FDG) positron emission tomography/computed tomography (PET-CT) and fat-water separated magnetic resonance imaging (MRI), each scanned following 2 hr exposure to thermoneutral (24 °C) and cold conditions (17 °C) in order to map brown adipose tissue (BAT) in adult human subjects.
Published February 18, 2015. Keywords: Medicine, magnetic resonance imaging, brown adipose tissue, cold-activation, adult human, fat water imaging, fluorodeoxyglucose, positron emission tomography, computed tomography
JoVE Immunology and Infection
1Emory Vaccine Center at Yerkes National Primate Research Center, Emory University, 2Department of Pathology and Laboratory Medicine, Emory University
HIV-1 pathogenesis is defined by both viral characteristics and host genetic factors. Here we describe a robust method that allows for reproducible measurements to assess the impact of the gag gene sequence variation on the in vitro replication capacity of the virus.
Published August 31, 2014. Keywords: Infectious Diseases, HIV-1, Gag, viral replication, replication capacity, viral fitness, MJ4, CEM, GXR25
1Department of Radiology, Memorial Sloan Kettering Cancer Center
Due to its multi-day radioactive half-life and favorable decay properties, the positron-emitting radiometal 89Zr is extremely well-suited for use in antibody-based radiopharmaceuticals for PET imaging. In this protocol, the bioconjugation, radiosynthesis, and preclinical application of 89Zr-labeled antibodies will be described.
Published February 12, 2015. Keywords: Chemistry, Positron Emission Tomography, Antibody, Bioconjugation, Immunoconjugates, Desferrioxamine, 89Zr
1Department of Pathology and Laboratory Medicine, University of North Carolina School of Medicine, 2Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, 3Division of Neuropathology, Department of Pathology and Laboratory Medicine, University of North Carolina School of Medicine, 4Curriculum in Genetics and Molecular Biology, University of North Carolina School of Medicine, 5Biological and Biomedical Sciences Program, University of North Carolina School of Medicine, 6Department of Radiation Oncology, Emory University School of Medicine, 7Department of Neurology, Neurosciences Center, University of North Carolina School of Medicine
Phenotypically wild-type astrocytes and neural stem cells harvested from mice engineered with floxed, conditional oncogenic alleles and transformed via viral Cre-mediated recombination can be used to model astrocytoma pathogenesis in vitro and in vivo by orthotopic injection of transformed cells into brains of syngeneic, immune-competent littermates.
Published August 12, 2014. Keywords: Neuroscience, astrocytoma, cortical astrocytes, genetically engineered mice, glioblastoma, neural stem cells, orthotopic allograft
1Department of Radiology, Memorial Sloan Kettering Cancer Center
The bioorthogonal inverse electron demand Diels-Alder cycloaddition has been harnessed to create an effective and modular pretargeted PET imaging strategy for cancer. In this protocol, the steps of this methodology are described in the context of a model system employing the colorectal cancer targeted antibody huA33 and a 64Cu-labeled radioligand.
Published February 3, 2015. Keywords: Bioengineering, Positron Emission Tomography, Click Chemistry, Pretargeting, Tetrazine, Trans-cyclooctene, Inverse Electron Demand Diels-Alder Cycloaddition
1Bloorview Research Institute, Holland Bloorview Kids Rehabilitation Hospital, 2Department of Occupational Science and Occupational Therapy, University of Toronto, 3Graduate Department of Rehabilitation Science, University of Toronto
This article provides an overview of a multi-modal approach to assessing recovery following concussion in youth athletes. The described protocol uses pre- and post-concussion assessment of performance across a wide variety of domains and can inform the development of improved concussion rehabilitation protocols specific to the youth sport community.
Published September 25, 2014. Keywords: Medicine, concussion, children, youth, athletes, assessment, management, rehabilitation
1Department of Biological Regulation, Weizmann Institute of Science, 2Unit of Biological Services, Weizmann Institute of Science, 3Department of Diagnostic Imaging, Meir Medical Center, 4Pathology Department, Meir Medical Center
We describe how to obtain parametric and vector maps of the diffusion tensor of the breast using magnetic resonance imaging. The protocol and final output following imaging processing are tailored for tracking breast architectural features and detecting breast malignancy.
Published December 15, 2014. Keywords: Medicine, Magnetic Resonance Imaging, breast, breast cancer, diagnosis, water diffusion, diffusion tensor imaging
1Bio-Imaging Lab, University of Antwerp
This article shows an optimized procedure for imaging of the neural substrates of auditory stimulation in the songbird brain using functional Magnetic Resonance Imaging (fMRI). It describes the preparation of the sound stimuli, the positioning of the subject and the acquisition and subsequent analysis of the fMRI data.
Published June 3, 2013. Keywords: Behavior, Neuroscience, Neurobiology, Molecular Biology, Medicine, Biophysics, Physiology, Anatomy, Functional MRI, fMRI, Magnetic Resonance Imaging, MRI, blood oxygenation level dependent fMRI, BOLD fMRI, Brain, Songbird, zebra finches, Taeniopygia guttata, Auditory Stimulation, stimuli, animal model, imaging
1Department of Otolaryngology - Head and Neck Surgery, University of Missouri, 2Department of Communication Science and Disorders, University of Missouri, 3Department of Medicine, University of Missouri
This study successfully adapted human videofluoroscopic swallowing study (VFSS) methods for use with murine disease models for the purpose of facilitating translational dysphagia research.
Published March 1, 2015. Keywords: Medicine, mouse, murine, rodent, swallowing, deglutition, dysphagia, videofluoroscopy, radiation, iohexol, barium, palatability, taste, translational, disease models
1Diagnostic Radiology, Yale University, 2Psychiatry, Yale University, 3Yale PET Center, Yale University, 4Biomedical Engineering, Yale University, 5Nuclear Medicine, Massachusetts General Hospital, 6Radiological Sciences, University of California, Irvine
We present a novel PET imaging approach for capturing dopamine fluctuations induced by cigarette smoking. Subjects smoke in the PET scanner. Dynamic PET images are modeled voxel-by-voxel in time by lp-ntPET, which includes a time-varying dopamine term. The results are 'movies' of dopamine fluctuations in the striatum during smoking.
Published August 6, 2013. Keywords: Behavior, Neuroscience, Neurobiology, Molecular Biology, Biomedical Engineering, Medicine, Anatomy, Physiology, Image Processing, Computer-Assisted, Receptors, Dopamine, Dopamine, Functional Neuroimaging, Binding, Competitive, mathematical modeling (systems analysis), Neurotransmission, transient, dopamine release, PET, modeling, linear, time-invariant, smoking, F-test, ventral-striatum, clinical techniques
1Laboratory of Neuromodulation, Department of Physical Medicine & Rehabilitation, Spaulding Rehabilitation Hospital and Massachusetts General Hospital, Harvard Medical School, 2School of Medicine, Pontifical Catholic University of Ecuador, 3Charité University Medicine Berlin, 4The City College of The City University of New York, 5Headache & Orofacial Pain Effort (H.O.P.E.), Biologic & Materials Sciences, School of Dentistry, University of Michigan
High-definition transcranial direct current stimulation (HD-tDCS), with its 4x1-ring montage, is a noninvasive brain stimulation technique that combines both the neuromodulatory effects of conventional tDCS with increased focality. This article provides a systematic demonstration of the use of 4x1 HD-tDCS, and the considerations needed for safe and effective stimulation.
Published July 14, 2013. Keywords: Medicine, Neurobiology, Neuroscience, Physiology, Anatomy, Biomedical Engineering, Biophysics, Neurophysiology, Nervous System Diseases, Diagnosis, Therapeutics, Anesthesia and Analgesia, Investigative Techniques, Equipment and Supplies, Mental Disorders, Transcranial direct current stimulation, tDCS, High-definition transcranial direct current stimulation, HD-tDCS, Electrical brain stimulation, Transcranial electrical stimulation (tES), Noninvasive Brain Stimulation, Neuromodulation, non-invasive, brain, stimulation, clinical techniques
1Center for Visual and Neurocognitive Rehabilitation, Atlanta VAMC, Department of Medicine, Division of General Medicine and Geriatrics, Emory University School of Medicine, 2Harvard Neurology Residency Program, Brigham and Woman‘s Hospital and Massachusetts General Hospital
Adapted tango has demonstrated efficacy for improving mobility and balance. We describe the dissemination of adapted tango teaching methods to dance instructor trainees and the implementation of adapted tango by the trainees in the community for improving mobility and balance in older adults and individuals with Parkinson’s disease.
Published December 9, 2014. Keywords: Behavior, Dance, tango, balance, pedagogy, dissemination, exercise, older adults, Parkinson's Disease, mobility impairments, falls
1Institute of Molecular Pathogenesis, Friedrich-Loeffler-Institut
This article describes bronchoscopic techniques in the bovine lung under experimental conditions, i.e. bronchoscopically guided inoculation, bronchoalveolar lavage, bronchial brushing, and transbronchial lung biopsy.
Published July 3, 2014. Keywords: Medicine, translational medicine, respiratory models, bovine lung, bronchoscopy, transbronchial lung biopsy, bronchoalveolar lavage, bronchial brushing, cytology brush
1Department of Biomedical Engineering, University of Rochester, 2Department of Chemical Engineering, University of Rochester, 3Center for Musculoskeletal Research, University of Rochester Medical Center
This video will illustrate a rapid, efficient method to methacrylate poly(ethylene glycol), enabling chain polymerizations and hydrogel synthesis. It will demonstrate how to similarly introduce methacrylamide functionalities into peptides, detail common analytical methods to assess functionalization efficiency, provide suggestions for troubleshooting and advanced modifications, and demonstrate typical hydrogel characterization techniques.
Published October 29, 2013. Keywords: Chemistry, Poly(ethylene glycol), peptides, polymerization, polymers, methacrylation, peptide functionalization, 1H-NMR, MALDI-ToF, hydrogels, macromer synthesis
1Department of Osteopathic Manipulative Medicine, New York Institute of Technology College of Osteopathic Medicine
Pneumonia is one of the top ten leading causes of death in the U.S. Osteopathic manipulative techniques (OMT) may be utilized as an adjunctive therapy in the treatment of pneumonia to enhance biomechanical and immune function; and ultimately, to reduce hospital stay, duration of antibiotics, incidence of respiratory failure, and mortality. In this video-article, we will review randomized controlled studies on the use of OMT in pneumonia patients, as well as demonstrate specific hands-on techniques that are routinely practiced by osteopathic physicians when treating pulmonary infections.
Published May 6, 2014. Keywords: Medicine, Pneumonia, osteopathic manipulative medicine (OMM) and techniques (OMT), lymphatic, rib raising, thoracic pump, muscle energy, doming diaphragm, alternative treatment
JoVE Developmental Biology
1Department of Medical Biophysics, University of Toronto, 2Sunnybrook Research Institute, 3Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto
Here, we present a protocol to inject ultrasound microbubble contrast agents into living, isolated late-gestation stage murine embryos. This method enables the study of perfusion parameters and of vascular molecular markers within the embryo using contrast-enhanced high-frequency ultrasound imaging.
Published March 4, 2015. Keywords: Developmental Biology, Micro-ultrasound, Molecular imaging, Mouse embryo, Microbubble, Ultrasound contrast agent, Perfusion
JoVE Immunology and Infection
1Program in Translational Biology and Molecular Medicine, Baylor College of Medicine, 2Department of Medicine, Division of Nephrology, Baylor College of Medicine, 3Department of Immunology and Pathology, Shinshu University School of Medicine, 4Center for Cell and Gene Therapy, Baylor College of Medicine, 5Department of Pediatrics, Baylor College of Medicine, 6Program in Cell and Molecular Biology, Baylor College of Medicine, 7Department of Molecular Virology and Microbiology, Baylor College of Medicine, 8Michael E. DeBakey VA Medical Center
We describe a method to genetically modify primary human T cells with a transgene using the non-viral piggyBac transposon system. T cells modified to using the piggyBac transposon system exhibit stable transgene expression.
Published November 5, 2012. Keywords: Immunology, Molecular Biology, Medicine, Genetics, Cellular Biology, Virology, Human T cells, Transposons, piggyBac, transgene
1Department of Electrical and Computer Engineering, Schulich School of Engineering, University of Calgary, 2Department of Radiology, University of Calgary
We demonstrate methods for the detection of architectural distortion in prior mammograms. Oriented structures are analyzed using Gabor filters and phase portraits to detect sites of radiating tissue patterns. Each site is characterized and classified using measures to represent spiculating patterns. The methods should assist in the detection of breast cancer.
Published August 30, 2013. Keywords: Medicine, Anatomy, Physiology, Cancer Biology, angular spread, architectural distortion, breast cancer, Computer-Assisted Diagnosis, computer-aided diagnosis (CAD), entropy, fractional Brownian motion, fractal dimension, Gabor filters, Image Processing, Medical Informatics, node map, oriented texture, Pattern Recognition, phase portraits, prior mammograms, spectral analysis
1Department of Biochemistry, Medical College of Wisconsin, 2Stanford Cardiovascular Institute, Stanford University School of Medicine, 3Department of Anesthesiology, Medical College of Wisconsin, 4Stem Cell and Regenerative Medicine Consortium, LKS Faculty of Medicine, Hong Kong University, 5Division of Cardiology, Johns Hopkins University School of Medicine, 6Cardiovascular Research Center, Biotechnology and Bioengineering Center, Medical College of Wisconsin
The article describes the detailed methodology to efficiently differentiate human pluripotent stem cells into cardiomyocytes by selectively modulating the Wnt pathway, followed by flow cytometry analysis of reference markers to assess homogeneity and identity of the population.
Published September 23, 2014. Keywords: Cellular Biology, human induced pluripotent stem cell, flow cytometry, directed differentiation, cardiomyocyte, IRX4, TNNI3, TNNT2, MCL2v, MLC2a
1Cytori Therapeutics Inc, 2Division of Cardiac Surgery, Department of Surgery, David Geffen School of Medicine at UCLA, 3Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine at UCLA, 4Department of Orthopedic Surgery, David Geffen School of Medicine at UCLA, 5Regenerative Bioengineering and Repair Laboratory, David Geffen School of Medicine at UCLA
In 2001, researchers at UCLA described the isolation of a population of adult stem cells, termed Adipose-derived Stem Cells or ASCs, from adipose tissue. This article outlines the isolation of ASCs from lipoaspirates using a manual, enzymatic digestion protocol using collagenase.
Published September 26, 2013. Keywords: Cellular Biology, Adipose Tissue, Stem Cells, Humans, Cell Biology, biology (general), enzymatic digestion, collagenase, cell isolation, Stromal Vascular Fraction (SVF), Adipose-derived Stem Cells, ASCs, lipoaspirate, liposuction
1Department of Biomedical Engineering, Ohio State University Wexner Medical Center, 2Davis Heart & Lung Research Institute, Ohio State University Wexner Medical Center, 3The Collaboration for Organ Perfusion, Protection, Engineering and Regeneration (COPPER) Laboratory, Ohio State University Wexner Medical Center, 4Division of Cardiac Surgery, Department of Surgery, Ohio State University Wexner Medical Center, 5Departments of Pediatrics and Internal Medicine, Ohio State University, 6Advanced Lung Disease Program, Lung and Heart-Lung Transplant Programs, Nationwide Children's Hospital, 7Division of Transplantation, Department of Surgery, Ohio State University Wexner Medical Center
Ex-Vivo Lung Perfusion (EVLP) has allowed lung transplantation in humans to become more readily available by enabling the ability to assess organs and expand the donor pool. Here, we describe the development of a rat EVLP program and refinements that allow for a reproducible model for future expansion.
Published February 25, 2015. Keywords: Medicine, EVLP, VILI, tidal volume, PEEP, lung transplant, positive pressure ventilation
1Department of Internal Medicine, Section on Gerontology and Geriatric Medicine, Wake Forest School of Medicine, 2Seahorse Biosciences
Methods for biopsy of Vastus lateralis, preparation of purified mitochondria, and respirometric profiling are described. The use of small muscle volume makes this technique suitable for clinical research applications.
Published February 7, 2015. Keywords: Medicine, Respirometry, mitochondria, bioenergetics, skeletal muscle, Vastus lateralis, biopsy
1Department of Thoracic, Cardiac, and Vascular Surgery, University Hospital Tuebingen
In this video article, we describe the in vitro synthesis of modified mRNA for induction of protein expression in cells.
Published November 13, 2014. Keywords: Genetics, mRNA synthesis, in vitro transcription, modification, transfection, protein synthesis, eGFP, flow cytometry
1Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, 2Division of Regenerative Medicine, Tulane National Primate Research Center, 3Department of Microbiology and Immunology, Tulane University School of Medicine, 4Department of Pharmacology, Tulane University School of Medicine
Whole-organ decellularization produces natural biological scaffolds that may be used for regenerative medicine. The description of a nonhuman primate model of lung regeneration in which whole lungs are decellularized and then seeded with adult stem cells and endothelial cells in a bioreactor that facilitates vascular circulation and liquid media ventilation is presented.
Published December 15, 2013. Keywords: Bioengineering, rhesus macaque, decellularization, recellularization, detergent, matrix, scaffold, large-organ bioreactor, mesenchymal stem cells
1Division of Pulmonary and Critical Care Medicine, State University of New York, Buffalo, 2Interventional Pulmonology Section, Division of Medicine, Roswell Park Cancer Institute, State University of New York, Buffalo
Substernal thyroid lesions are common, and need to be differentiated from malignancy. Obtaining percutaneous fine needle biopsy is not possible due to its retrosternal location. This article proposes a protocol for biopsy of substernal thyroid lesions using Endobronchial Ultrasound-guided Transbronchial Needle Aspiration (EBUS-TBNA).
Published November 10, 2014. Keywords: Medicine, substernal thyroid, retrosternal thyroid, intra-thoracic thyroid, goiter, endobronchial ultrasound, EBUS, transbronchial needle aspiration, TBNA, biopsy, needle biopsy
1Pritzker School of Medicine, University of Chicago, 2Department of Medicine, University of Chicago, 3Department of Medicine, Northshore University Health Systems, 4Department of Pathology, University of Chicago, 5Department of Surgery, University of Chicago, 6Department of Biostatistics, University of Chicago
A thoracic oncology database was developed to serve as a comprehensive repository for clinical and laboratory data for the purposes of translational research. The database will serve translational cancer researchers within the Thoracic Oncology Research Program. This database is adaptable to other cancer models, as well as other human diseases.
Published January 22, 2011. Keywords: Medicine, Database, Thoracic oncology, Bioinformatics, Biorepository, Microsoft Access, Proteomics, Genomics
1Department of Medicine, Baylor College of Medicine, 2Division of Diabetes, Endocrinology & Metabolism, Diabetes & Endocrinology Research Center, Baylor College of Medicine, 3Department of Molecular & Cellular Biology, Baylor College of Medicine
We describe hepatic neo-islet formation in STZ (streptozotocin)-induced diabetic mice by gene transfer of Neurogenin3 (Ngn3) and Betacellulin (Btc) using helper-dependent adenoviral vector (HDAd) and the reversal of hyperglycemia. Our method takes advantages of helper-dependent adenoviral vectors with their highly efficient in vivo transduction and the long lasting gene expression.
Published October 10, 2012. Keywords: Medicine, Genetics, Physiology, Gene therapy, Neurogenin3, Betacellulin, helper-dependent adenoviral vectors, Type 1 diabetes, islet neogenesis
1Cardiac Muscle Research Laboratory, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, 2Division of Cardiovascular Medicine, Chi-Mei Medical Center, Tainan
Coronary flow reserve (CFR) is useful for assessment of myocardial oxygen demand and evaluation of cardiovascular risk. This study establishes a step-by-step transthoracic Doppler echocardiographic (TTDE) method for longitudinal monitoring of the changes in CFR, as measured from coronary artery in mice, under the experimental pressure overload of aortic banding.
Published April 13, 2015. Keywords: Medicine, Coronary flow reserve, Doppler echocardiography, non-invasive methodology, use of animals in research, pressure overload, aortic banding
1Interdepartmental Program in Translational Biology & Molecular Medicine, Baylor College of Medicine, 2Texas Children's Cancer Center, Baylor College of Medicine, 3Department of Pediatrics, Baylor College of Medicine, 4Department of Pathology, The Methodist Hospital Research Institute, 5Department of Ophthalmology, Retinoblastoma Center of Houston, 6Baylor College of Medicine, Center for Cell and Gene Therapy, 7Center for Cell and Gene Therapy, Baylor College of Medicine
A method is described to propagate human retinoblastoma tumors in mice. Tumor cells are directly injected into the eyes of immune deficient mice. Secondary tumors have been successfully established using both cells directly harvested from human tumors and cultured tumorspheres.
Published August 4, 2011. Keywords: Medicine, retinoblastoma, tumor, xenograft, tumorsphere, mouse, human, eye, cancer stem cell
JoVE Immunology and Infection
1Department of Neurosurgery, UCLA David Geffen School of Medicine, 2Department of Molecular and Medical Pharmacology, UCLA David Geffen School of Medicine, 3Department of Medicine, UCLA David Geffen School of Medicine, 4Brain Research Institute, UCLA David Geffen School of Medicine, 5Jonsson Comprehensive Cancer Center, UCLA David Geffen School of Medicine
We describe a protocol to monitor radial mobility of non-adherent immune cells in vitro using a cell sedimentation manifold/slide apparatus. Cell migration is tracked on monolayers of tumor cells or on extracellular matrix proteins. Examination by light and fluorescence microscopy allows for observation of cell mobility and cytotoxic functionality.
Published February 11, 2015. Keywords: Immunology, non-adherent cell migration, fluorescence microscopy, cell sedimentation manifold, allogeneic CTL, monolayer, T cell, extracellular matrix, gliom
1Biomedical Engineering Department, Johns Hopkins University School of Medicine, 2Translational Tissue Engineering Center, Johns Hopkins University School of Medicine, 3Wilmer Eye Institute, Johns Hopkins University School of Medicine, 4Institute for Nanobiotechnology, Johns Hopkins University School of Medicine
A protocol for nanoparticle tracking analysis (NTA) and high-throughput flow cytometry to evaluate polymeric gene delivery nanoparticles is described. NTA is utilized to characterize the nanoparticle particle size distribution and the plasmid per particle distribution. High-throughput flow cytometry enables quantitative transfection efficacy evaluation for a library of gene delivery biomaterials.
Published March 1, 2013. Keywords: Biomedical Engineering, Bioengineering, Tissue Engineering, Cellular Biology, Medicine, Genetics, Biocompatible Materials, Biopolymers, Drug Delivery Systems, Nanotechnology, bioengineering (general), Therapeutics, Nanoparticle, poly(beta-amino ester), high-throughput, transfection, nanoparticle tracking analysis, biomaterial, gene delivery, flow cytometry
1Institute for Computational Medicine and the Department of Biomedical Engineering, Johns Hopkins University
A methodology to estimate ventricular fiber orientations from in vivo images of patient heart geometries for personalized modeling is described. Validation of the methodology performed using normal and failing canine hearts demonstrate that that there are no significant differences between estimated and acquired fiber orientations at a clinically observable level.
Published January 8, 2013. Keywords: Bioengineering, Biomedical Engineering, Medicine, Anatomy, Physiology, Cardiology, Myocytes, Cardiac, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, MRI, Diffusion Magnetic Resonance Imaging, Cardiac Electrophysiology, computerized simulation (general), mathematical modeling (systems analysis), Cardiomyocyte, biomedical image processing, patient-specific modeling, Electrophysiology, simulation
1Department of Pediatrics, Stanford University School of Medicine, 2Department of Orthopaedic Surgery, Stanford University School of Medicine
Protocols are described for studying breast cancer cell migration, proliferation and colonization in a human bone tissue explant model system.
Published March 15, 2015. Keywords: Medicine, Metastatic niche, bone microenvironment, breast cancer metastasis, human bone, osteotropism, ex vivo model, explant culture system, bioluminescence imaging
JoVE Immunology and Infection
1Department of Microbiology, New York University School of Medicine, 2Molecular Neurobiology Program, Skirball Institute for Biomolecular Medicine, New York University School of Medicine, 3Department of Otolaryngology, New York University School of Medicine, 4Department of Cell Biology, New York University School of Medicine, 5Department of Physiology and Neuroscience, New York University School of Medicine, 6Department of Psychiatry, New York University School of Medicine, 7Center for Neural Science, New York University School of Medicine
The protocol describes an efficient and reproducible model system to study herpes simplex virus type 1 (HSV-1) latency and reactivation. The assay employs homogenous sympathetic neuron cultures and allows for the molecular dissection of virus-neuron interactions using a variety of tools including RNA interference and expression of recombinant proteins.
Published April 2, 2012. Keywords: Immunology, neuron cell culture, Herpes Simplex Virus (HSV), molecular biology, virology
1The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, 2Department of Oncology, The Johns Hopkins University School of Medicine, 3Department of Dermatology, The Johns Hopkins University School of Medicine, 4Department of Surgery, Johns Hopkins University School of Medicine, 5The Sol Goldman Pancreatic Cancer Center, The Johns Hopkins University School of Medicine, 6Yale Cancer Center, Yale School of Medicine, 7The Skip Viragh Center for Pancreatic Cancer, The Johns Hopkins University School of Medicine, 8Department of Pathology, The Johns Hopkins University School of Medicine
B7-H1 (PD-L1) and its binding to PD-1 provide a major tumor-induced immunosuppressive signal in the tumor’s microenvironment. An immunohistochemical staining technique to characterize the expression and localization of B7-H1 in pancreatic adenocarcinoma is described here.
Published January 3, 2013. Keywords: Cancer Biology, Medicine, Immunology, Biochemistry, Molecular Biology, Cellular Biology, Chemistry, Oncology, immunohistochemistry, B7-H1 (PD-L1), pancreatic adenocarcinoma, pancreatic cancer, pancreas, tumor, T-cell immunity, cancer
JoVE Immunology and Infection
1Department of Environmental Medicine, New York University School of Medicine, Tuxedo, 2Division of Allergy, Pulmonary, & Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, 3Division of Pulmonary Medicine, New York University School of Medicine
A specific and rapid protocol to simultaneously investigate right heart function, lung inflammation, and the immune response is described as a learning tool. Video and figures describe physiology and microdissection techniques in an organized team-approach that is adaptable to be used for small to large sized studies.
Published January 16, 2013. Keywords: Immunology, Medicine, Anatomy, Physiology, Cardiology, Surgery, Cardiovascular Abnormalities, Inflammation, Respiration Disorders, Immune System Diseases, Cardiac physiology, mouse, pulmonary hypertension, right heart function, lung immune response, lung inflammation, lung remodeling, catheterization, mice, tissue, animal model
JoVE Developmental Biology
1Stanford Cardiovascular Institute, Stanford University School of Medicine, 2Institute of Stem Cell Biology and Regenerative Medicine, Cardiovascular Medicine Division, Department of Medicine, Child Health Research Institute, Stanford University School of Medicine
Here, we describe a robust protocol for human cardiomyocyte derivation that combines small molecule-modulated cardiac differentiation and glucose deprivation-mediated cardiomyocyte purification, enabling production of purified cardiomyocytes for the purposes of cardiovascular disease modeling and drug screening.
Published March 18, 2015. Keywords: Developmental Biology, Human induced pluripotent stem cells, cardiac differentiation, small molecule compounds, cardiomyocytes, glucose starvation
1Institute for Regenerative Medicine at Scott & White Hospital, Texas A&M Health Science Center, 2Department of Orthopedic Surgery, University of Texas Medical Branch, 3Molecular and Cellular Medicine, Texas A&M Health Science Center
Animal models are frequently employed to mimic serious bone injury in biomedical research. Due to their small size, establishment of stabilized bone lesions in mice are beyond the capabilities of most research groups. Herein, we describe a simple method for establishing and analyzing experimental femoral defects in mice.
Published March 15, 2015. Keywords: Medicine, Bone injury model, critical sized defect, mice, femur, tissue engineering, comparative medicine, medullary pin.
1Stem Cell Research Center, Department of Bioengineering and Orthopedic Surgery, University of Pittsburgh, 2Department of Orthopedic Surgery, University of Pittsburgh, 3Nazarbayev University Research and Innovation System, Nazarbayev University, 4Department of Orthopaedic Surgery, UCLA Orthopaedic Hospital and the Orthopaedic Hospital Research Center, University of California at Los Angeles, 5Department of Cell Biology, Erasmus MC Stem Cell Institute, 6OHSU Center for Regenerative Medicine, Oregon Health & Science University, 7Centre for Cardiovascular Science and MRC Centre for Regenerative Medicine, Queen's Medical Research Institute and University of Edinburgh, 8David Geffen School of Medicine and the Orthopaedic Hospital Research Center, University of California at Los Angeles, 9Stem Cell Research Center, Department of Orthopedic Surgery and McGowan Institute for Regenerative Medicine, University of Pittsburgh
Blood vessels within human skeletal muscle harbor several multi-lineage precursor populations that are ideal for regenerative applications. This isolation method allows simultaneous purification of three multipotent precursor cell populations respectively from three structural layers of blood vessels: myogenic endothelial cells from intima, pericytes from media, and adventitial cells from adventitia.
Published August 21, 2014. Keywords: Cellular Biology, Blood Vessel; Pericyte; Adventitial Cell; Myogenic Endothelial Cell; Multipotent Precursor
1Department of Medicine B, University Hospital Münster, 2Department of Pediatric Rheumatology and Immunology, University Children's Hospital Münster
Small animal imaging techniques allow serial diagnostic examinations and therapeutic interventions in vivo. Recently, the scope of applications has significantly widened and currently includes assessment of colonic tumor development, wound healing and monitoring of inflammation. This protocol illustrates these diverse potential applications of murine endoscopy.
Published August 26, 2014. Keywords: Medicine, gastroenterology, in vivo imaging, murine endoscopy, diagnostic imaging, carcinogenesis, intestinal wound healing, experimental colitis
1Keck School of Medicine, University of Southern California, 2Psoriasis and Skin Treatment Center Dermatology, University of California, San Francisco, 3University of California Irvine School of Medicine, 4University of Arizona College of Medicine, 5Chicago College of Osteopathic Medicine
Psoriasis is a chronic, immune-mediated inflammatory skin disease. The Goeckerman regimen, formulated for the treatment of psoriasis, consists of exposure to ultraviolet B (UVB) light and application of crude coal tar (CCT). The following protocol is for the administration of Goeckerman therapy for the treatment of moderate-to-severe psoriasis.
Published July 11, 2013. Keywords: Medicine, Infection, Biomedical Engineering, Anatomy, Physiology, Immunology, Dermatology, Skin, Dermis, Epidermis, Skin Diseases, Skin Diseases, Eczematous, Goeckerman, Crude Coal Tar, phototherapy, psoriasis, Eczema, Goeckerman regimen, clinical techniques
1Fondazione Banca Degli Occhi del Veneto O.N.L.U.S., 2Telethon Institute for Genetics & Medicine (T.I.G.E.M.)
The paper describes a simplified technique to excise corneal and to eviscerate retinal tissues from the ocular globe of human cadaveric donors. The technique described here will help to excise good quality tissues to be used for transplantation, surgical or research purposes without damaging other tissues of the ocular globe.
Published June 12, 2012. Keywords: Medicine, Physiology, Human cadaver ocular globe, in situ excision, corneal tissue, in situ evisceration, retinal tissue
1Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, 2Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, 3Department of Surgery, John A. Burns School of Medicine, University of Hawai'i, 4University of Central Florida College of Medicine
During mammalian development, early gestational skin wounds heal without a scar. Here we detail a reliable and reproducible model of fetal scarless wound healing in the cutaneous dorsum of E16.5 (scarless) and E18.5 (scarring) mouse embryos.
Published January 16, 2015. Keywords: Medicine, fetal surgery, scarless, scar, wound healing, regeneration, skin, fibrosis
1Department of Medicine, Renal division, University of Pittsburgh School of Medicine, 2Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine
This manuscript presents a simple, yet powerful, in vitro method for evaluating smooth muscle contractility in response to pharmacological agents or nerve stimulation. Main applications are drug screening and understanding tissue physiology, pharmacology, and pathology.
Published August 18, 2014. Keywords: Medicine, Krebs, species differences, in vitro, smooth muscle contractility, neural stimulation
JoVE Immunology and Infection
1Center for Cell and Gene Therapy, Baylor College of Medicine, 2Pathology and Immunology, Baylor College of Medicine, 3Department of Stem Cell Transplantation and Cellular Therapy, University of Texas M.D. Anderson Cancer Center, 4Medicine, Baylor College of Medicine, 5Department of Pediatrics, Baylor College of Medicine
Here we describe the first good manufacturing practice (GMP)-compliant method of producing virus-specific cytotoxic T lymphocytes (CTL) from umbilical cord blood, a source of predominantly naîve T cells.
Published May 7, 2012. Keywords: Immunology, Cytotoxic T Lymphocytes (CTL), virus, stem cell transplantation, cord blood, naïve T cells, medicine
1W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins University Bloomberg School of Public Health, 2School of Life Sciences, Chinese University of Hong Kong, 3Center for Cell Dynamics, Department of Biological Chemistry, Johns Hopkins University School of Medicine
The term anastasis refers to the phenomenon in which dying cells reverse a cell suicide process at a late stage, repair themselves, and ultimately survive. Here we demonstrate protocols for detecting and tracking cells that undergo anastasis.
Published February 16, 2015. Keywords: Cellular Biology, Anastasis, apoptosis, apoptotic bodies, caspase, cell death, cell shrinkage, cell suicide, cytochrome c, DNA damage, genetic alterations, mitochondrial outer membrane permeabilization (MOMP), programmed cell death, reversal of apoptosis