Therapeutics:
Procedures concerned with the remedial treatment or prevention of diseases.
JoVE Clinical and Translational Medicine
Surgical Technique for Spinal Cord Delivery of Therapies: Demonstration of Procedure in Gottingen Minipigs
1Department of Neurosurgery, Emory University, 2Department of Neuroscience, Medical University of South Carolina, 3Division of Neurosurgery, University of Alabama, Birmingham, 4Department of Biomedical Engineering, Georgia Institute of Technology, 5Department of Biomedical Engineering, Emory University
Short visual description of the surgical technique and device used for the delivery of (gene and cell) therapies into the spinal cord. The technique is demonstrated in the animal but is entirely translatable and currently being used for human application.
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 Clinical and Translational Medicine
Analytical Techniques for Assaying Nitric Oxide Bioactivity
1Texas Therapeutics Institute, University of Texas Health Science Center at Houston, 2Deptartment of Pediatrics, Baylor College of Medicine
The endogenous production of nitric oxide (NO) regulates a wide variety of biological functions. It is becoming increasingly clear that disruption or dysregulation of NO based signaling is involved in many human diseases. Methods to quantify relevant NO metabolites may provide novel diagnostic or prognostic biomarkers for human disease.
JoVE Immunology and Infection
Identifying Dysregulated Genes Induced by Kaposi's Sarcoma-associated Herpesvirus (KSHV)
Host cell factors play a critical role in the establishment and maintenance of Kaposi's sarcoma (KS). We outline methods to identify host cell factors altered in KSHV-infected DMVEC cells, and in KS tumor tissue. Cellular genes altered by virus will serve as potential target(s) for novel therapeutics.
JoVE Clinical and Translational Medicine
Stem Cell Transplantation in an in vitro Simulated Ischemia/Reperfusion Model
Institute of Human Physiology and Clinical Experimental Research, Semmelweis University
We demonstrate how to set up an in vitro ischemia/reperfusion model and how to evaluate the effect of stem cell therapy on postischemic cardiac cells.
JoVE General
Combining QD-FRET and Microfluidics to Monitor DNA Nanocomplex Self-Assembly in Real-Time
1Mechanical Engineering, Johns Hopkins University, 2Biomedical Engineering, Duke University, 3Biomedical Engineering, Johns Hopkins University
We present a novel and powerful integration of nanophotonics (QD-FRET) and microfluidics to investigate the formation of polyelectrolyte polyplexes, which is expected to provide better control and synthesis of uniform and customizable polyplexes for future nucleic acid-based therapeutics.
JoVE Immunology and Infection
RNAi Screening for Host Factors Involved in Vaccinia Virus Infection using Drosophila Cells
Department of Microbiology, Penn Genome Frontiers Institute, University of Pennsylvania
Novel host factors involved in viral infection can be identified through cell-based genome-wide loss of function RNAi screening. A Drosophila cell culture model is particularly amenable to this approach due to the ease and efficiency of RNAi. Here we demonstrate this technique using vaccinia virus as an example.
JoVE Neuroscience
Strategies for Study of Neuroprotection from Cold-preconditioning
Department of Neurology, The University of Chicago Medical Center
We seek to define the neural immune signaling responsible for cold-preconditioning as means to identify novel targets for therapeutics development to protect brain before injury onset. We present strategies for such work that require biological systems, experimental manipulations plus technical capacities that are highly reproducible and sensitive.
JoVE Clinical and Translational Medicine
A High-throughput Automated Platform for the Development of Manufacturing Cell Lines for Protein Therapeutics
Merck Research Laboratory, Merck & Co., Inc
A high-throughput, automated platform of manufacturing cell line development for producing protein therapeutics is described. Implementation of BD FACS Aria Cell Sorter, CloneSelect Imager and TECAN Freedom EVO liquid handling system has demonstrated significantly increased processing capacity in cell line development with improved cell line quality and high reproducibility.
JoVE Clinical and Translational Medicine
Delivery of Therapeutic Agents Through Intracerebroventricular (ICV) and Intravenous (IV) Injection in Mice
1Department of Molecular Microbiology and Immunology, Bond Life Sciences Center, University of Missouri, 2Department of Biological Sciences, Columbia University, 3Department of Veterinary Pathobiology, Bond Life Sciences Center, University of Missouri
This article demonstrates two very different methods of injection: 1) into the brain (intracerebroventricular) and 2) systemic (intravenous) to introduce the therapeutic agents into the central nervous system of neonatal mice.
JoVE Immunology and Infection
Development of Cell-type specific anti-HIV gp120 aptamers for siRNA delivery
1Department of Molecular and Cellular Biology, Beckman Research Institute of City of Hope, 2Graduate School of Biological Sciences, Beckman Research Institute of City of Hope, 3Shared Resource-DNA/RNA Peptide, Beckman Research Institute of City of Hope
Several 2’-Fluoro RNA aptamers against HIV-1Ba-L gp120 with nanomole affinity are isolated from a RNA library by in vitro SELEX procedure. A new dual inhibitory function anti-gp120 aptamer-siRNA chimera is created and shows considerable promise for systemic anti-HIV therapy.
JoVE Editorial
March 2012: This Month in JoVE
Here are some highlights from the March 2012 Issue of Journal of Visualized Experiments (JoVE).
JoVE Clinical and Translational Medicine
A Simple Guide Screw Method for Intracranial Xenograft Studies in Mice
1Monash Institute of Medical Research, 2MD Anderson Cancer Centre, University of Texas
In order to evaluate novel therapeutic paradigms for the treatment of glioma, physiological relevant models are essential. We utilize an implantable guide screw procedure for establishment of intracranial xenograft models that is more rapid and safer than stereotactic approaches.
JoVE Clinical and Translational Medicine
In Vivo Canine Muscle Function Assay
1Department of Neurology and Wake Forest Institute for Regenerative Medicine, Wake Forest University, 2Department of Human Nutrition, Foods and Exercise, Virginia Polytechnic Institute and State University, 3Departments of Pathology and Laboratory Medicine and Neurology and the Gene Therapy Center , University of North Carolina-Chapel Hill
We describe a minimally-invasive and painless method to measure canine hindlimb muscle strength and muscle response to repeated eccentric contractions.
JoVE Neuroscience
Detection of Neuritic Plaques in Alzheimer's Disease Mouse Model
Department of Neuroscience, The University of British Columbia
One of the pathological characteristics of AD is the formation of Amyloid β protein positive neuritic plaques. In this protocol we describe two methods to detect neuritic plaques in transgenic AD model mice: immunohistochemical detection using the ABC and DAB method and fluorescent detection using thioflavin S staining method.
JoVE Bioengineering
Methods Development for Blood Borne Macrophage Carriage of Nanoformulated Antiretroviral Drugs
Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center
Nanoparticles of indinavir, ritonavir, efavirenz and atazanavir were manufactured using wet milling, homogenization and ultrasonication. These nanoformulations, collectively termed nanoformulated antiretroviral therapy (nanoART), assessed macrophage-based drug delivery. Monocyte-derived macrophage nanoART uptake, retention and sustained release were determined. These preliminary studies suggest the potential of nanoART for clinical use.
JoVE Neuroscience
SDS-PAGE/Immunoblot Detection of Aβ Multimers in Human Cortical Tissue Homogenates using Antigen-Epitope Retrieval
1Yerkes National Primate Research Center, Emory University, 2Department of Neurology, Institute of Clinical Medicine, Tsukuba University, 3Department of Pathology, New York University School of Medicine, 4Department of Neurology, Emory University
We describe a technique for the preparation of clarified human cortical homogenates, protein separation by SDS-PAGE, antigen retrieval and immunoblotting with an antibody to the Aβ peptide. Using this protocol, we consistently detect monomeric and multimeric Aβ in cortical tissue from humans with Alzheimer's pathology.
JoVE Clinical and Translational Medicine
Modeling and Imaging 3-Dimensional Collective Cell Invasion
1Strathclyde Institute for Pharmacy and Biomedical Sciences, University of Strathclyde, 2The Beatson Institute for Cancer Research
Models of tumor cell invasion into three-dimensional extracellular matrix better reflect the in vivo situation than two-dimensional motility assays. Using matrix invasion assays combined with confocal imaging of fluorescently-labeled cells, detailed information on invasion modes and the distinct contributions of leading versus following cells can be obtained.
JoVE Clinical and Translational Medicine
An Orthotopic Bladder Tumor Model and the Evaluation of Intravesical saRNA Treatment
1Department of Urology and Helen Diller Comprehensive Cancer Center, University of California, San Francisco, 2Alnylam Pharmaceuticals, Inc.
Establishing an orthotopic bladder tumor model to evaluate antitumor effects of intravesically delivered saRNA and monitoring tumor growth by ultrasound and bioluminescent imaging.
JoVE Immunology and Infection
Multicolor Flow Cytometry Analyses of Cellular Immune Response in Rhesus Macaques
1Department of Immunology, MD Anderson Cancer Center - University of Texas, 2Department of Medicine, University of Miami
We demonstrate the utility of multicolor flow cytometry for detailed phenotypic and functional characterization of total as well as memory subsets of CD4+ and CD8+ T cells in rhesus macaques, the ideal model for HIV/AIDS vaccine studies.
JoVE Neuroscience
Systemic and Local Drug Delivery for Treating Diseases of the Central Nervous System in Rodent Models
Department of Neurological Surgery, University of California, San Francisco - UCSF
Thorough preclinical testing of drugs that act in the central nervous system often involves assessing and comparing drug biodistribution in association with specific routes of administration. Here, three commonly used methods of systemic delivery (intravenous, intraperitoneal, and oral) as well as a method for local delivery (convection-enhanced delivery) are demonstrated in mice.
JoVE Clinical and Translational Medicine
Murine Bioluminescent Hepatic Tumour Model
1Cork Cancer Research Centre, Mercy University Hospital and Leslie C. Quick Jnr. Laboratory, University College Cork, 2Department of Computer Science, University College Cork, 3South Infirmary Victoria University Hospital
This article describes a procedure for the induction of orthotopic bioluminescent liver tumours in mice, and subsequent analysis of tumour growth confined to the liver using live whole body luminescence imaging.
JoVE General
Isolation and Animal Serum Free Expansion of Human Umbilical Cord Derived Mesenchymal Stromal Cells (MSCs) and Endothelial Colony Forming Progenitor Cells (ECFCs)
Stem Cell Research Unit, Medical University of Graz, Austria
This protocol describes the isolation and subsequent expansion of mesenchymal stromal cells and endothelial colony forming cells without the use of animal serum to generate autologous pairs for experimental transplantation purposes.
JoVE General
Direct Tracheal Instillation of Solutes into Mouse Lung
1Department of Physiology, Emory University, 2Center for Respiratory Health, Emory University, 3Department of Medicine, Emory University
Intratracheal instillations deliver solutes directly into the lungs. This procedure targets the delivery of the instillate into the distal regions of the lung, and is therefore often incorporated in studies aimed at studying alveoli. We provide a detailed survival protocol for performing intratracheal instillations in mice.
JoVE Clinical and Translational Medicine
The Use of Thermal Infra-Red Imaging to Detect Delayed Onset Muscle Soreness
1Loma Linda University, 2Azusa Pacific University
The purpose of this investigation was to assess whether using an infra-red thermal camera is a valid tool for detecting and quantifying the muscle soreness after exercising.
JoVE Bioengineering
Microfluidic Device for Recreating a Tumor Microenvironment in Vitro
Department of Chemical Engineering, University Of Massachusetts Amherst
We present the procedure for fabrication and operation of a microfluidic device that recreates heterogeneous tumor microenvironments in vitro. The variability in apoptosis within tumor tissue was quantified using fluorescent stains and the effective diffusion coefficient of the chemotherapeutic drug doxorubicin into tumor tissue was evaluated.
JoVE General
Preparation of Pooled Human Platelet Lysate (pHPL) as an Efficient Supplement for Animal Serum-Free Human Stem Cell Cultures
Stem Cell Research Unit, Medical University of Graz, Austria
Human platelet lysate is a rich source of growth factors and a potent supplement in cell culture. This protocol presents the process of preparing a large pool of human platelet lysate by starting from platelet rich plasma, performing several freeze-thaw cycles and depleting the platelet fragments.
JoVE Immunology and Infection
Generation of Organotypic Raft Cultures from Primary Human Keratinocytes
1Department of Microbiology & Immunology, University of North Carolina-Chapel Hill, 2Lineberger Cancer Center, University of North Carolina-Chapel Hill
An in vitro method to mimic in vivo epithelial differentiation is described. Many viruses target epithelial cells as part of their viral life cycle, and this method provides a means of examining virus:host interactions that more closely resembles that which occurs in vivo. This technique can be used with primary keratinocytes, established cell lines, as well as normal or diseased biopsy tissue.
JoVE General
Analyzing and Building Nucleic Acid Structures with 3DNA
1Department of Chemistry & Chemical Biology and BioMaPS Institute for Quantitative Biology, Rutgers - The State University of New Jersey, 2Department of Biological Sciences, Columbia University
The 3DNA software package is a popular and versatile bioinformatics tool with capabilities to analyze, construct, and visualize three-dimensional nucleic acid structures. This article presents detailed protocols for a subset of new and popular features available in 3DNA, applicable to both individual structures and ensembles of related structures.
JoVE General
Isometric and Eccentric Force Generation Assessment of Skeletal Muscles Isolated from Murine Models of Muscular Dystrophies
1Department of Anatomy and Cell Biology, School of Dental Medicine, University of Pennsylvania, 2Department of Physiology, Perelman School of Medicine, University of Pennsylvania, 3Department of Anatomy and Cell Biology, School of Dental Medicine, School of Dental Medicine, University of Pennsylvania
Muscle function measurements contribute to the evaluation of potential therapeutics for muscle pathology, as well as to the determination of mechanisms underlying physiology of this tissue. We will demonstrate the preparation of the extensor digitorum longus and diaphragm muscles for functional testing. Protocols for isometric and eccentric contractions will be shown, as well as differences in results between dystrophic muscles, representing a pathological state, and wildtype muscles.
JoVE Immunology and Infection
Ex Vivo Red Blood Cell Hemolysis Assay for the Evaluation of pH-responsive Endosomolytic Agents for Cytosolic Delivery of Biomacromolecular Drugs
1Department of Biomedical Engineering, Vanderbilt University, 2Vanderbilt Institute for Nanoscale Science & Engineering, Vanderbilt University, 3Interdisciplinary Materials Science Program, Vanderbilt University, 4Monroe Carell Jr. Children's Hospital, Vanderbilt University Medical Center, 5Department of Chemical & Biomolecular Engineering, Vanderbilt University, 6Department of Cancer Biology, Vanderbilt University
A hemolysis assay can be used as a rapid, high-throughput screen of drug delivery systems' cytocompatibility and endosomolytic activity for intracellular cargo delivery. The assay measures the disruption of erythrocyte membranes as a function of environmental pH.
JoVE Clinical and Translational Medicine
Optimized System for Cerebral Perfusion Monitoring in the Rat Stroke Model of Intraluminal Middle Cerebral Artery Occlusion
Department of Neuroscience and Biomedical Technologies, University of Milano Bicocca
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.
JoVE Editorial
August 2012: This Month in JoVE
1Department of Ophthalmology, Massachusetts Eye and Ear, 2JoVE Content Production
Traditional microscopy requires lens objectives to magnify specimens, and can involve numerous optical components like additional objectives, filters, and mirrors to refract and direct light to optical sensors. The August 2012 issue of JoVE (Journal of Visualized Experiments) is marked by the third publication from the Ozcan Lab (University of California, Los Angeles) on their lens-free "on-chip" microscopy platform, which they have pioneered.
JoVE General
Quantifying Agonist Activity at G Protein-coupled Receptors
1Department of Pharmacology, University of California, Irvine, 2Department of Pharmacology, University of California, 3Schmid College of Science, Chapman University
A method for estimating the affinity constant of an agonist for the active state (Kb) of a G protein-coupled receptor is described. The analysis provides absolute or relative measures of Kb depending on whether constitutive receptor activation is measurable. Our method applies to various responses downstream from receptor activation.
JoVE Clinical and Translational Medicine
Ex Vivo Infection of Live Tissue with Oncolytic Viruses
Center for Innovative Cancer Research, Ottawa Hospital Research Institute (OHRI)
Oncolytic viruses are promising for cancer therapeutics. The ability to ascertain the infectability of live tissue specimens obtained from patients prior to treatment is a unique advantage of this therapeutic approach. This protocol describes how to process tissues for ex vivo infection with oncolytic virus and subsequent viral quantification.
JoVE General
Murine Model for Parkinson's Disease: from 6-OH Dopamine Lesion to Behavioral Test
Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Brasil
Parkinson disease is caused by loss of dopaminergic innervation to the striatum, which can be experimentally induced by 6-OH-dopamine. We describe how to perform a stereotaxic lesion and to monitor apomorphine-induced rotational behavior in mice. This model is useful and reliable for testing new therapies for Parkinson disease.
JoVE Immunology and Infection
Efficient Recombinant Parvovirus Production with the Help of Adenovirus-derived Systems
1Tumour Virology Division F010, German Cancer Research Center (DKFZ), 2Inserm Unit 701, German Cancer Research Center (DKFZ)
Here we describe a protocol based only on cell infection, which improves the efficiency of recombinant parvovirus production by more than 100 fold in comparison to other protocols in use. This protocol relies on the use of a novel adenovirus 5-based helper containing the parvovirus VP transcription unit (Ad-VP).
JoVE Bioengineering
Therapeutic Gene Delivery and Transfection in Human Pancreatic Cancer Cells using Epidermal Growth Factor Receptor-targeted Gelatin Nanoparticles
Department of Pharmaceutical Sciences, School of Pharmacy, Northeastern University
Type B gelatin-based engineered nanovectors system (GENS) was developed for systemic gene delivery and transfection in the treatment of pancreatic cancer. By modification with epidermal growth factor receptor (EGFR) specific peptide on the surface of nanparticles, they could target on EGFR receptor and release plasmid under reducing environment, such as high intracellular glutathione concentrations.
JoVE Clinical and Translational Medicine
Clinical Testing and Spinal Cord Removal in a Mouse Model for Amyotrophic Lateral Sclerosis (ALS)
1Dept. of Neurology, University Medicine Göttingen, 2DFG Research Center for the Molecular Physiology of the Brain (CMPB), Göttingen, Germany
A mouse model for amyotrophic lateral sclerosis (ALS) is examined clinically and behaviorally. As a prerequisite for an accompanying immunohistological analysis the preparation of the spinal cord is depicted in detail.
JoVE General
Examining BCL-2 Family Function with Large Unilamellar Vesicles
Biochemically-defined large unilamellar vesicles (LUVs) are a convenient model system to analyze BCL-2 family interactions with immediate implications in better understanding the mitochondrial pathway of apoptosis. A method to produce LUVs, along with standard BCL-2 family protein combinations and controls to examine LUV permeabilization, are presented.
JoVE Clinical and Translational Medicine
Orthotopic Xenografting of Human Luciferase-Tagged Malignant Peripheral Nerve Sheath Tumor Cells for in vivo Testing of Candidate Therapeutic Agents
1Department of Pathology, University of Alabama at Birmingham - UAB, 2Department of Radiology, University of Alabama at Birmingham - UAB, 3Department of Cell Biology and Neurobiology, University of Alabama at Birmingham - UAB
A method for reliably grafting luciferase-tagged human malignant peripheral nerve sheath tumor cells into the sciatic nerve of immunodeficient mice is described. The use of bioluminescence imaging to demonstrate proper establishment of tumor grafts and criteria for random segregation of animals into study groups are also discussed.
JoVE Clinical and Translational Medicine
Method for Novel Anti-Cancer Drug Development using Tumor Explants of Surgical Specimens
1Department of Neurological Surgery, The Ohio State University Medical Center, 2Department of Pathology, The Ohio State University Medical Center
Here, we established a method for drug efficacy testing with surgical specimens of brain tumors, termed “tumor explant method”. With this method, we can evaluate drug efficacy without breaking the microenvironment of solid tumors. To validate reliability of this method, we describe representative data with our glioma specimen treated with the current first-line chemotherapeutic agent, temozolomide.
JoVE Neuroscience
Autologous Blood Injection to Model Spontaneous Intracerebral Hemorrhage in Mice
1Department of Neurology, University of Connecticut Health Center, 2Department of Neurology, School of Medicine, University of Pennsylvania, 3Department of Neurosurgery, Hartford Hospital, 4Department of Neurosurgery, School of Medicine, University of Pennsylvania
The autologous blood injection model of intracerebral hemorrhage in mice described in this protocol uses the double injection technique to minimize risk of blood reflux up the needle track, no anticoagulants in the pumping system, and eliminates all dead space and expandable tubing in the system.
JoVE Immunology and Infection
Non-invasive Imaging of Leukocyte Homing and Migration in vivo
1Department of Pathology and Immunology, Washington University in St. Louis, 2National Institute of Neurological Disorders and Stroke, NINDS, NIH - National Institute of Health
Here, we describe a non-invasive two-photon (2P) microscopy approach to study leukocyte homing in the mouse footpad. We discuss the technical aspects of our tissue imaging preparation and walk the reader through a typical experiment from initial set up to execution and data collection.
JoVE Clinical and Translational Medicine
Use of Animal Model of Sepsis to Evaluate Novel Herbal Therapies
The Feinstein Institute for Medical Research, North Shore – LIJ Health System
Sepsis refers to a systemic inflammatory response syndrome resulting from a microbial infection, and can be simulated by a surgical technique termed cecal ligation and puncture (CLP). Here we describe a method to use CLP-induced animal model to screen medicinal herbs for therapeutic agents.
JoVE Neuroscience
The Dig Task: A Simple Scent Discrimination Reveals Deficits Following Frontal Brain Damage
Department of Psychology, Southern Illinois University at Carbondale
In this protocol, a novel application of scent discrimination is described. The Dig task is a reasonably inexpensive task that can be used to assess frontally-mediated cognition following brain damage.
JoVE Neuroscience
Selection of Aptamers for Amyloid β-Protein, the Causative Agent of Alzheimer's Disease
1Department of Neurology, David Geffen School of Medicine, 2Molecular Biology Institute, University of California, Los Angeles, 3Brain Research Institute, University of California, Los Angeles
Aptamers are short ribo-/deoxyribo-oligonucleotides selected by in-vitro evolution methods based on affinity for a specific target. Aptamers are molecular recognition tools with versatile therapeutic, diagnostic, and research applications. We demonstrate methods for selection of aptamers for amyloid β-protein, the causative agent of Alzheimer's disease.
JoVE General
Rapid and Efficient Generation of Neurons from Human Pluripotent Stem Cells in a Multititre Plate Format
1Max Planck Institute for Molecular Biomedicine, 2Medical Faculty, University of Münster
Protocols for neuronal differentiation of pluripotent human stem cells (hPSCs) are often time-consuming and require substantial cell culture skills. Here, we have adapted a small molecule-based differentiation procedure to a multititre plate format, allowing simple, rapid, and efficient generation of human neurons in a controlled manner.
JoVE General
Detection of Viral RNA by Fluorescence in situ Hybridization (FISH)
1Lady Davis Institute for Medical Research, Sir Mortimer B. Davis Jewish General Hospital, 2Department of Microbiology and Immunology, McGill University, 3Department of Medicine, Division of Experimental Medicine, McGill University
A fluorescence in situ hybridization (FISH) method was developed to visually detect viral genomic RNA using fluorescence microscopy. A probe is made with specificity to the viral RNA that can then be identified using a combination of hybridization and immunofluorescence techniques. This technique offers the advantage of identifying the localization of the viral RNA or DNA at steady-state, providing information on the control of intracellular virus trafficking events.
JoVE General
Tracking Dynamics of Muscle Engraftment in Small Animals by In Vivo Fluorescent Imaging
1Department of Anesthesia, Brigham and Woman's Hospital, 2Department of Radiology, Brigham and Woman's Hospital
We describe an in vivo fluorescence imaging protocol to monitor muscle regeneration by GFP-labeled myoblasts after transplantation into skeletal muscles of both healthy and dystrophic mice. This protocol can be adapted to study muscle regeneration by transplantation of other types of cells and in other muscular conditions as well.
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