JoVE General
A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals
We present a noninvasive sampling approach to efficiently collect hair samples from elusive small mammals, as shown for the American pika. We demonstrate the utility of this method by extracting DNA from sampled hair and amplifying several types of molecular markers commonly used in studies of wildlife ecology and conservation.
JoVE General
Expression Analysis of Mammalian Linker-histone Subtypes
We describe a set of assays to analyze expression levels of H1 linker histones. mRNA of individual H1 genes are quantitatively measured by random primer based reverse transcription followed by real-time PCR, whereas protein quantification of H1 histones is achieved by HPLC analysis.
JoVE General
Isolation and Primary Culture of Rat Hepatic Cells
1Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, 2American University in Washington, D.C., 3Department of Internal Medicine, Saint Louis University School of Medicine
Primary hepatocytes provide a valuable tool to evaluate biochemical, molecular, and metabolic functions in a physiologically relevant experimental system. We describe a reliable protocol for rat in situ liver perfusion, which consistently generates viable hepatocytes up to 1.0 × 108 cells per preparation with cell viability between 88 ~ 96%.
JoVE Clinical and Translational Medicine
Generation of Comprehensive Thoracic Oncology Database - Tool for Translational Research
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.
JoVE Clinical and Translational Medicine
Intraoperative Detection of Subtle Endometriosis: A Novel Paradigm for Detection and Treatment of Pelvic Pain Associated with the Loss of Peritoneal Integrity
1Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Greenville Hospital System, 2Department of Pathology, Duke University Health System, 3Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Duke University
Loss of peritoneal integrity provides a new paradigm to understand and treat chronic pelvic pain in women with mild forms of endometriosis and can be easily detected using intraoperative instillation of dye at the time of laparoscopy.
JoVE Neuroscience
Designing and Implementing Nervous System Simulations on LEGO Robots
1Marine Science Center, Northeastern University, 2Fachrichtung Bionik, Bremen University of Applied Sciences
An approach to neural network modeling on the LEGO Mindstorms robotics platform is presented. The method provides a simulation tool for invertebrate neuroscience research in both the research lab and the classroom. This technique enables the investigation of biomimetic robot control principles.
JoVE Clinical and Translational Medicine
Non-invasive Assessment of Microvascular and Endothelial Function
1Department of Family and Community Medicine, Thomas Jefferson University, 2Department of Pharmacology and Experimental Therapeutics, Biostatistics Division, Thomas Jefferson University, 3Department of Internal Medicine, Thomas Jefferson University
Capillaroscopy is a non-invasive, relatively inexpensive methodology for directly visualizing the microcirculation. The forearm blood flow technique provides accepted non-invasive measures of endothelial function.
JoVE Clinical and Translational Medicine
Gene Transfer for Ischemic Heart Failure in a Preclinical Model
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.
JoVE Neuroscience
Cerebral Blood Oxygenation Measurement Based on Oxygen-dependent Quenching of Phosphorescence
1Optics Division, Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, 2Department of Biochemistry and Biophysics, University of Pennsylvania, 3Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, 4Departments of Neurosciences and Radiology, University of California
We present an experimental procedure for measuring the partial pressure of oxygen (pO2) in cerebral vasculature based on oxygen-dependent quenching of phosphorescence. Animal preparation and imaging procedures were outlined for both large field of view CCD-based imaging of pO2 in rats and 2-photon excitation based imaging of pO2 in mice.
JoVE General
Orthogonal Protein Purification Facilitated by a Small Bispecific Affinity Tag
School of Biotechnology, Department of Proteomics, Royal Institute of Technology
A novel and highly efficient two-step affinity chromatography protocol has been developed and is described in detail. The method is based on a small purification tag with two inherent affinities and is applicable to a wide range of target proteins with different properties.
JoVE Neuroscience
Multiphoton Microscopy of Cleared Mouse Brain Expressing YFP
1Department of Biomedical Engineering, Yale University, 2Department of Biomedical Engineering, Louisiana Tech University
Multiphoton microscopy of whole mouse organs is possible by optically clearing the organ before imaging, but not all protocols preserve the fluorescent signal of fluorescent proteins. Using an optical clearing method with ethanol-based dehydration and benzyl alcohol:benzyl benzoate clearing, we show high-resolution multiphoton images of whole mouse brain expressing YFP.
JoVE Clinical and Translational Medicine
Multi-modal Imaging of Angiogenesis in a Nude Rat Model of Breast Cancer Bone Metastasis Using Magnetic Resonance Imaging, Volumetric Computed Tomography and Ultrasound
1Department of Medical Physics in Radiology, German Cancer Research Center, Heidelberg, Germany, 2Unit of Chemotherapy and Toxicology, German Cancer Research Center, Heidelberg, Germany
In the pathogenesis of bone metastasis, angiogenesis is a crucial process and therefore represents a target for imaging and therapy. Here, we present a rat model of site-specific breast cancer bone metastasis and describe strategies to non-invasively image angiogenesis in vivo using magnetic resonance imaging, volumetric computed tomography and ultrasound.
JoVE General
An Analytical Tool that Quantifies Cellular Morphology Changes from Three-dimensional Fluorescence Images
1Medications Development, Ernest Gallo Clinic and Research Center, University of California, San Francisco, 2Clinical Pharmacology and Experimental Therapeutics, University of California, San Francisco, 3Translational Research Institute and the Institute for Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia
We developed a software platform that utilizes Imaris Neuroscience, ImarisXT and MATLAB to measure the changes in morphology of an undefined shape taken from three-dimensional confocal fluorescence of single cells. This novel approach can be used to quantify changes in cell shape following receptor activation and therefore represents a possible additional tool for drug discovery.
JoVE Clinical and Translational Medicine
Cerenkov Luminescence Imaging (CLI) for Cancer Therapy Monitoring
Use of Cerenkov Luminescence Imaging (CLI) for monitoring preclinical cancer treatment is described here. This method takes advantage of Cerenkov Radiation (CR) and optical imaging (OI) to visualize radiolabeled probes and thus provides an alternative to PET in preclinical therapeutic monitoring and drug screening.
JoVE Clinical and Translational Medicine
A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
1Orvis School of Nursing, University of Nevada, Reno, 2The State University of New York at Buffalo, St. Joseph's Medical Center, 3Strong Memorial Hospital, University of Rochester Medical Center
Continuous 12-lead electrocardiographic (ECG) monitoring can identify transient myocardial ischemia, even when asymptomatic, among patients with suspected acute coronary syndrome (ACS). In this article we describe our method for initiating patient monitoring using a Holter device, downloading the ECG data for off-line analysis, and how to utilize the ECG software to identify transient ischemia.
JoVE Bioengineering
Procedure for Lung Engineering
1Department of Biomedical Engineering, Yale University, 2Department of Biomedical Engineering, School of Medicine, Duke University, 3Department of Anesthesia, Yale University
We have developed a decellularized lung extracellular matrix and novel biomimetic bioreactor that can be used to generate functional lung tissue. By seeding cells into the matrix and culturing in the bioreactor, we generate tissue that demonstrates effective gas exchange when transplanted in vivo for short periods of time.
JoVE General
Blood Collection from the American Horseshoe Crab, Limulus Polyphemus
1Department of Molecular and Cell Biology, University of California, Davis, 2Marine Biological Laboratory - MBL- woods hole, 3Department of Biological Sciences, Hunter College of CUNY
The American horseshoe crab, Limulus polyphemus, is arguably the most convenient source for large quantities of blood of any invertebrate. The blood is simple in composition, with only one cell-type in the general circulation, the granular amebocyte, and only three abundant proteins in the plasma, hemocyanin, the C-reactive proteins, and α2-macroglobulin. Blood is collected from the heart and the blood cells and plasma are separated by centrifugation.
JoVE General
Gross Dissection of the Stomach of the Lobster, Homarus Americanus
Volen Center for Complex Systems, Brandeis
We describe the gross dissection of the stomach of the American lobster (Homarus americanus).
JoVE Neuroscience
Direct Intraventricular Delivery of Drugs to the Rodent Central Nervous System
Department of Neurology, Washington University in St. Louis School of Medicine
We describe a method to target drugs to the central nervous system by either implanting a catheter or performing a bolus injection into the right lateral ventricle in mice. We focus specifically on the delivery of antisense oligonucleotides. This technique is readily adaptable to other drugs and to rats.
JoVE General
Homarus Americanus Stomatogastric Nervous System Dissection
Volen Center for Complex Systems, Brandeis
We describe the fine dissection of the stomatogastric nervous system from the stomach of the American lobster (Homarus americanus).
JoVE Neuroscience
Manufacturing and Using Piggy-back Multibarrel Electrodes for In vivo Pharmacological Manipulations of Neural Responses
Department of Physiology & Biophysics, University of Colorado Medical Campus
Iontophoresis of neural agonists and antagonists during extracellular in vivo recordings is a powerful way to manipulate a neuron’s microenvironment. These manipulations can most easily be done via piggy-back multibarrel electrodes. Here we describe how to manufacture them and use them during auditory recordings.
JoVE Immunology and Infection
Clinical Application of Sleeping Beauty and Artificial Antigen Presenting Cells to Genetically Modify T Cells from Peripheral and Umbilical Cord Blood
1Division of Pediatrics, U.T. MD Anderson Cancer Center, 2Department of Stem Cell Transplantation and Cellular Therapy, U.T. MD Anderson Cancer Center
T cells expressing a CD19-specific chimeric antigen receptor (CAR) are infused as investigational treatment of B-cell malignancies in our first-in-human gene therapy trials. We describe genetic modification of T cells using the Sleeping Beauty (SB) system to introduce CD19-specific CAR and selective propagation on designer CD19+ artificial antigen presenting cells.
JoVE Clinical and Translational Medicine
Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma
1Director of Pulmonary Special Procedures and the Lung Cancer Center, Virginia Hospital Center, 2Chief, Division of Pulmonary Critical Care and Sleep Medicine, Virginia Hospital Center
Bronchial thermoplasty is a non-drug procedure for severe persistent asthma that delivers thermal energy to the airway wall in a precisely controlled manner to reduce excessive airway smooth muscle. Reducing airway smooth muscle decreases the ability of the airways to constrict, thereby reducing the frequency of asthma attacks.
JoVE Immunology and Infection
Separation of Single-stranded DNA, Double-stranded DNA and RNA from an Environmental Viral Community Using Hydroxyapatite Chromatography
1Department of Microbial and Environmental Genomics, The J. Craig Venter Institute, 2Department of Synthetic Biology and Bioenergy, The J. Craig Venter Institute
We describe an efficient method to separate single-stranded DNA, double-stranded DNA and RNA molecules from environmental viral communities. Nucleic acids are fractionated using hydroxyapatite chromatography with increasing concentrations of phosphate-containing buffers. This method permits the isolation of all viral nucleic acid types from environmental samples.
JoVE Neuroscience
Preparation of Oligomeric β-amyloid1-42 and Induction of Synaptic Plasticity Impairment on Hippocampal Slices
Taub Institute for Research on Alzheimer's Disease and Aging Brain, Columbia University
One feature of Alzheimer's Disease is the elevation of Aβ1-42 peptide. Here we provide a protocol for preparing synthetic Aβ1-42 oligomers, which impairs hippocampal Long-Term Potentiation, a cellular correlate of memory. This procedure is useful for investigating mechanisms of Aβ-induced pathology and drug screening.
JoVE General
Labeling Stem Cells with Fluorescent Dyes for non-invasive Detection with Optical Imaging
This video shows techniques for labeling of human embryonic stem cells and mesenchymal stem cells with fluorescent dyes. This technique can be used for an in vivo tracking of transplanted stem cells with optical imaging and for histopathological correlations with fluorescence microscopy.
JoVE General
In vitro Labeling of Human Embryonic Stem Cells for Magnetic Resonance Imaging
Division of Cardiovascular Medicine, Stanford University
In this video, we are showing how to label human embryonic stem cells (hESC) with manganese chloride (MnCl2) which can enter cells via voltage-gated calcium channels when the cells are biologically active. Additionally, we show the use of MnCl2 as cellular MRI contrast agent to determine the in vitro viability of hESC.
JoVE Neuroscience
Design and Construction of a Cost Effective Headstage for Simultaneous Neural Stimulation and Recording in the Water Maze
Department of Neuroscience, Friedman Brain Institute, Mount Sinai School of Medicine
We present a low-cost method to design and construct a light headstage pre-amplifier system with simultaneous neural recording and stimulation capability. This device can be waterproofed for use in swimming animals.
JoVE Neuroscience
In vivo Laser Axotomy in C. elegans
A protocol to cut neurons in C. elegans with a MicroPoint pulsed laser is presented. We describe setting up the system, immobilizing worms, and severing labeled neurons. Advantages include a relatively low-cost system and the ability to sever neuronal processes or ablate cells in vivo.
JoVE Bioengineering
The Three-Dimensional Human Skin Reconstruct Model: a Tool to Study Normal Skin and Melanoma Progression
Molecular and Cellular Oncogenesis Program, The Wistar Institute
In this report, we describe the three-dimensional skin reconstruct model which mimics human skin in architecture and composition. Melanocyte physiology, melanoma progression and the fate of dermal stem cells have been investigated using the skin reconstruct model. The model is also useful as a preclinical tool for drug assessment.
JoVE Immunology and Infection
Production and Titering of Recombinant Adeno-associated Viral Vectors
1School of Medical Sciences, College of Life Sciences and Medicine, University of Aberdeen, 2Translational Neuroscience Facility and Department of Physiology, School of Medical Sciences, University of New South Wales, 3Department of Biochemistry and Molecular Biophysics, Columbia University
Recombinant adeno-associated virus (rAAVs) vectors are becoming increasingly valuable for in vivo studies in animals. We describe how rAAVs can be produced in the laboratory and how these vectors can be titered to give an accurate reading of the number of infectious particles produced.
JoVE Bioengineering
Analyzing Cellular Internalization of Nanoparticles and Bacteria by Multi-spectral Imaging Flow Cytometry
1Department of Veterinary Microbiology and Preventive Medicine, Iowa State University, 2Amnis Corporation, 3Department of Chemical and Biological Engineering, Iowa State University
In this article, we describe a method utilizing multi-spectral imaging flow cytometry to quantify the internalization of polyanhydride nanoparticles or bacteria by RAW 264.7 cells.
JoVE General
Genome-wide Gene Deletions in Streptococcus sanguinis by High Throughput PCR
The Philips Institute of Oral and Craniofacial Molecular Biology, Virginia Commonwealth University
An efficient genome-wide single gene mutation method has been established using Streptococcus sanguinis as a model organism. This method has achieved via high throughput recombinant PCRs and transformations.
JoVE Clinical and Translational Medicine
Endothelin-1 Induced Middle Cerebral Artery Occlusion Model for Ischemic Stroke with Laser Doppler Flowmetry Guidance in Rat
1Department of Neurosurgery, University of Florida, 2Department of Anatomical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran, 3Department of Physiology and Functional Genomics, University of Florida, 4Department of Neurology, University of Florida
Several animal models of cerebral ischemia have been developed to simulate the human condition of stroke. This protocol describes the endothelin-1 (ET-1) induced middle cerebral artery occlusion (MCAO) model for ischemic stroke in rats. In addition, important considerations, advantages, and shortcomings of this model are discussed.
JoVE Bioengineering
Density Gradient Multilayered Polymerization (DGMP): A Novel Technique for Creating Multi-compartment, Customizable Scaffolds for Tissue Engineering
1Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, 2Biomedical Sciences Program, University of California, San Diego, 3Department of Bioengineering, University of California, San Diego
Here we describe a unique strategy for creating biocompatible, layered matrices with continuous interfaces between distinct layers for tissue engineering. Such a scaffold could provide an ideal customizable environment to modulate cell behavior by various biological, chemical or mechanical cues
JoVE General
Microinjection of mRNA and Morpholino Antisense Oligonucleotides in Zebrafish Embryos.
Department of Genetics, Yale University School of Medicine
Microinjection is a well-established and effective method for introducing foreign substances into fertilized zebrafish embryos. Here, we demonstrate a robust microinjection technique for performing mRNA overexpression, and morpholino oligonucleotide gene knockdown studies in zebrafish.
JoVE Immunology and Infection
Isolation of Functional Cardiac Immune Cells
Department of Cell Biology and Anatomy, University of South Carolina- School of Medicine
This method for isolating functional immune cells from the heart provides an alternative to the conventional methods of collagenase digestion, which causes unwanted immune cell activation, resulting in a decreased responsiveness of these cells. Our method of isolation yields functional cardiac immune cells by avoiding problems associated with enzymatic digestion.
JoVE Bioengineering
Photoacoustic Cystography
1Department of Biomedical Engineering, University at Buffalo, The State University of New York, 2Department of Creative IT Engineering, Pohang University of Science and Technology (POSTECH), 3School of Electrical Engineering and Computer Science, Kyungpook National University
Photoacoustic cystography (PAC) has a great potential to map urinary bladders, a radiation sensitive internal organ in pediatric patients, without using any ionizing radiation or toxic contrast agent. Here we demonstrate the use of PAC for mapping urinary bladders with an injection of optical-opaque tracers in rats in vivo.
JoVE Clinical and Translational Medicine
Mouse Complete Stasis Model of Inferior Vena Cava Thrombosis
Conrad Jobst Vascular Research Laboratories, Section of Vascular Surgery, University of Michigan
The mouse complete stasis model of inferior vena cava thrombosis yields quantifiable amounts of vein wall tissue and thrombus. It has proven useful for evaluating interactions between the vein wall and the occlusive thrombus and in assessing the progression from acute to chronic inflammation.
JoVE Bioengineering
Fabrication of Electrochemical-DNA Biosensors for the Reagentless Detection of Nucleic Acids, Proteins and Small Molecules
1Department of Chemistry and Biochemistry, University Of California Santa Barbara, 2Department of Chemistry and Biochemistry, Program in BioMolecular Science and Engineering, University Of California Santa Barbara
"E-DNA" sensors, reagentless, electrochemical biosensors that perform well even when challenged directly in blood and other complex matrices, have been adapted to the detection of a wide range of nucleic acid, protein and small molecule analytes. Here we present a general procedure for the fabrication and use of such sensors.
JoVE Clinical and Translational Medicine
High-frequency High-resolution Echocardiography: First Evidence on Non-invasive Repeated Measure of Myocardial Strain, Contractility, and Mitral Regurgitation in the Ischemia-reperfused Murine Heart
1Department of Surgery, The Ohio State University, 2Heart and Lung Research Institute, The Ohio State University, 3Department of Cardiovascular Medicine, The Ohio State University
High frequency Doppler ultrasound is a novel technology for assessing regional myocardial function. This work presents first evidence demonstrating applicability of this versatile imaging platform for the repeated measure of myocardial strain, dp/dt, and mitral regurgitation in the ischemia-reperfused (IR) murine heart.
JoVE Clinical and Translational Medicine
Using Visual and Narrative Methods to Achieve Fair Process in Clinical Care
1Institute for Behavioral Health, Brandeis University, 2Heller School for Social Policy and Management, Brandeis University
This paper illustrates an innovative visual approach (photovoice or photo-elicitation) to achieve fair process in clinical care for patients living with chronic health conditions, illuminate gaps in clinical knowledge, forge better therapeutic relationships, and identify patient-centered goals and possibilities for healing.
JoVE Bioengineering
Synthesis, Assembly, and Characterization of Monolayer Protected Gold Nanoparticle Films for Protein Monolayer Electrochemistry
1Department of Chemistry, Gottwald Center for the Sciences, University of Richmond, 2Department of Biochemistry and Molecular Biology, Gottwald Center for the Sciences, University of Richmond
Alkanethiolate stabilized gold colloids known as monolayer protected clusters (MPCs) are synthesized, characterized, and assembled into thin films as an adsorption interface for protein monolayer electrochemistry of simple redox protein like Pseudomonas aeruginosa azurin (AZ) and cytochrome c (cyt c).
JoVE Clinical and Translational Medicine
The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation
University of Leipzig Heart Center
The accompanying video describes a procedure for percutaneous placement of the WATCHMAN Left Atrial Appendage (LAA) Device. The WATCHMAN is a nitinol device designed to be permanently implanted at, or slightly distal to, the opening of the left atrial appendage (LAA) to trap blood clots before they exit the LAA, preventing thromboembolic stroke.
JoVE Bioengineering
Tri-layered Electrospinning to Mimic Native Arterial Architecture using Polycaprolactone, Elastin, and Collagen: A Preliminary Study
1Department of Biomedical Engineering, Virginia Commonwealth University, 2Department of Anatomy and Neurobiology, Virginia Commonwealth University, 3Department of Cardiovascular Surgery, University Hospital of Geneva
The aim of this study was to mimic the native three layered architecture of the arterial wall. To accomplish this, electrospinning was employed with the use of a 3-1 (input-output) nozzle and blends of polycaprolactone, elastin, and collagen.
JoVE Immunology and Infection
A 1.5 Hour Procedure for Identification of Enterococcus Species Directly from Blood Cultures
1Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Cente, 2Pasadena, CA, Southern California Permanente Medical Group, 3Detroit, Detroit Medical Center, 4Woburn, MA, AdvanDx
A rapid protocol for the direct identification of Enterococcus faecalis and other Enterococcus species from a positive blood culture using a Peptide Nucleic Acid fluorescent in situ hybridization assay (PNA FISH).
JoVE General
A Novel Method for the Culture and Polarized Stimulation of Human Intestinal Mucosa Explants
1Department of Experimental Oncology, European Institute of Oncology, 2Department of Pathology and Laboratory Medicine, European Institute of Oncology, 3U.O. Gastroenterologia 2, IRCCS Ca' Granda, Ospedale Policlinico di Milano
We introduce a novel method for the maintenance of human intestinal mucosa in culture and monitoring of the response to various types of stimuli over at least 24 hrs. With our method, the polarity of the tissue is maintained, allowing for a physiological stimulation via the apical route.
JoVE General
Atmospheric-pressure Molecular Imaging of Biological Tissues and Biofilms by LAESI Mass Spectrometry
Department of Chemistry, George Washington University
Laser ablation electrospray ionization (LAESI) is an atmospheric-pressure ion source for mass spectrometry. In the imaging mode, a mid-infrared laser probes the distributions of molecules across a tissue section or a biofilm. This technique presents a new approach for diverse bioanalytical studies carried out under native experimental conditions.
JoVE Bioengineering
Three-dimensional Optical-resolution Photoacoustic Microscopy
Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University in St. Louis
Optical-resolution photoacoustic microscopy (OR-PAM) is an emerging technology capable of imaging optical absorption contrasts in vivo with cellular resolution and sensitivity. Here, we provide a visualized instruction on the experimental protocols of OR-PAM, including system configuration, system alignment, typical in vivo experimental procedures, and functional imaging schemes.
JoVE General
Small-scale Nuclear Extracts for Functional Assays of Gene-expression Machineries
Department of Cell Biology, Harvard Medical School
A protocol for preparation of robust, small-scale HeLa nuclear extracts is described. This protocol is valuable for assays that require use of small populations of cells, such as cells treated with drugs or RNAi. The method should be applicable to a wide variety of gene expression assays and other cell types, including patient cells.
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