Adult Stem Cells:
Cells with high proliferative and self renewal capacities derived from adults.
JoVE General
Isolation and Culture of Adult Epithelial Stem Cells from Human Skin
Department of Cancer Biology, University of Massachusetts Medical School
A rapid, robust way of isolating viable adult epithelial stem cells from human skin is described. The method utilizes enzymatic digestion of skin collagen matrix , followed by plucking of hair follicles and isolation of single cell suspensions or tissue fragments for cell culture.
JoVE Clinical and Translational Medicine
Isolation, Characterization and Comparative Differentiation of Human Dental Pulp Stem Cells Derived from Permanent Teeth by Using Two Different Methods
1Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran, 2Department of Endocrinology & Female Infertility, Reproductive Biomedicine Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
The method described isolation and characterization of human Dental Pulp Stem Cells (hDPSCs) by using either enzymatic dissociation of pulp (DPSC-ED) or direct outgrowth of stem cells from pulp tissue explants (DPSC-OG). Then followed by in vitro comparative differentiation of both types of hDPSCs into odontoblasts.
JoVE General
Naïve Adult Stem Cells Isolation from Primary Human Fibroblast Cultures
1Department of Dermatology and Institute for Medical Engineering, Technische Universität München, 2Department of Dermatology and Allergology, Technische Universität München
We report a method to isolate naïve multipotent skin-derived precursor (SKP) cells from primary human fibroblast cultures. We show that these SKPs derived from fibroblast cultures share similar stem cell properties to the ones derived directly from human skin biopsies. These cells express the neural crest marker, nestin, in addition to the multipotent markers such as OCT4 and Nanog.
JoVE Neuroscience
Isolation and Culture of Neural Crest Stem Cells from Human Hair Follicles
Department of Pathology and Laboratory Medicine, School of Medicine, University of Pennsylvania
This article presents a robust protocol for isolation and culture of neural crest stem cells from human hair follicles.
JoVE General
Serial Enrichment of Spermatogonial Stem and Progenitor Cells (SSCs) in Culture for Derivation of Long-term Adult Mouse SSC Lines
Department of Surgery, Weill Cornell Medical College
A simple method to derive and maintain spermatogonial stem and progenitor cell lines from adult mice is presented here. The method utilizes feeder cells originating from the somatic cell compartment of the adult mouse testis. This technique is applicable to common mouse strains, including transgenic, knock-out, and knock-in mice.
JoVE General
Dissection of the Adult Zebrafish Kidney
Department of Biological Sciences, University of Notre Dame
The zebrafish kidney is home to both renal and hematopoietic adult stem/progenitor cells, and represents an outstanding opportunity to study these cell types and their progeny in a vertebrate model organism. Here, we demonstrate a detailed dissection procedure that enables the researcher to identify and surgically remove the adult zebrafish kidney, which can be used for applications such as cell isolation, transplantation, and expression studies of kidney and/or blood cell populations.
JoVE General
Isolation and Enrichment of Rat Mesenchymal Stem Cells (MSCs) and Separation of Single-colony Derived MSCs
Department of Chemical Engineering and Materials Science, City of Hope Cancer Center
Rat MSCs were isolated from femurs and tibias and then enriched by magnetic cell sorting. Sorted cells were confirmed for the expression of surface markers by flow cytometry. These cells were also cultured at clonal density to form single colonies and then these colonies were separated by cloning cylinders.
JoVE General
Xenotransplantation of Human Stem Cells into the Chicken Embryo
1Department of Physiology, University of Oslo, 2Norwegian Center for Stem Cell Research, University of Oslo
In this paper we present a method for transplanting human stem cells into various regions of the central nervous system of the chicken embryo. This provides an in vivo model for assessing the proliferation and differentiation of various types of human stem cells in embryonic tissue environments.
JoVE General
Adult and Embryonic Skeletal Muscle Microexplant Culture and Isolation of Skeletal Muscle Stem Cells
School of Biosciences, University of Birmingham
The micro-dissected explants technique is a robust and reliable method for isolating proliferative skeletal muscle cells from juvenile, adult or embryonic muscles as a source of skeletal muscle stem cells. Uniquely, these cells have been clonally derived to produce skeletal muscle stem cell lines used for in vivo transplantation.
JoVE Clinical and Translational Medicine
Processing of Primary Brain Tumor Tissue for Stem Cell Assays and Flow Sorting
Stem Cell and Cancer Research Institute, McMaster University
The identification of brain tumor initiating cells (BTICs), the rare cells within a heterogeneous tumor possessing stem cell properties, provides new insights into human brain tumor pathogenesis. We have refined specific culture conditions to enrich for BTICs, and we routinely use flow cytometry to further enrich these populations. Self-renewal assays and transcript analysis by single cell RT-PCR can subsequently be performed on these isolated cells.
JoVE Neuroscience
Neural-Colony Forming Cell Assay: An Assay To Discriminate Bona Fide Neural Stem Cells from Neural Progenitor Cells
1Department of Neurosurgery, University of Florida, 2Department of Anatomical Sciences, Shiraz University of Medical Sciences, 3STEMCELL Technologies, Inc.
This video protocol demonstrates how to discriminate and enumerate bona fide neural stem cells in a mixed population of neural precursor cells using the neural colony-forming cell assay.
JoVE Neuroscience
Growth and Differentiation of Adult Hippocampal Arctic Ground Squirrel Neural Stem Cells
1Alaska Basic Neuroscience Program, Institute of Arctic Biology, University of Alaska at Fairbanks, 2Department Biochemistry, Hood College, 3Department of Cell Biology, Neuronascent, Inc., 4Research and Development, Neuronascent, Inc.
Neural stem cells were prepared from the hippocampus of adult non-hibernating yearling Arctic ground squirrels (AGS). These neural stem cells can be expanded through numerous passages, differentiated and maintained as a nearly 50:50 neuron to glial culture.
JoVE General
In vitro and in vivo Bioluminescence Reporter Gene Imaging of Human Embryonic Stem Cells
Departments of Radiology and Medicine (Cardiology), Stanford University School of Medicine
With the growing interest in stem cell therapies, molecular imaging techniques are ideal for monitoring stem cell behavior after transplantation. Luciferase reporter genes have enabled non-invasive, repetitive assessment of cell survival, location, and proliferation in vivo. This video will demonstrate how to track hESC proliferation in a living mouse.
JoVE Immunology and Infection
Isolation of Precursor B-cell Subsets from Umbilical Cord Blood
1Department of Pathology and Anatomical Sciences, University of Missouri-Columbia, 2Laboratory for Infectious Disease Research, University of Missouri-Columbia
Here we describe a protocol for isolating subsets of precursor B-cells from umbilical cord blood. A sufficient quantity and quality of nucleic acids may be extracted from the cells and used in subsequent assays utilizing DNA or RNA.
JoVE Clinical and Translational Medicine
Patient Derived Cell Culture and Isolation of CD133+ Putative Cancer Stem Cells from Melanoma
1Institute of Pathology, Laboratory of Molecular Tumor Pathology, Charité - Universitätsmedizin Berlin, 2Institute for Chemistry and Biochemistry, Free University Berlin, 3Laboratory for Functional Genomics Charité (LFGC), Charité - Universitätsmedizin Berlin, 4Comprehensive Cancer Center Charité, Charité - Universitätsmedizin Berlin
This article describes the preparation of freshly obtained melanoma tissue into primary cell cultures, and how to remove contaminations of erythrocytes and fibroblasts from the tumor cells. Finally, we describe how CD133+ putative melanoma stem cells are sorted from the CD133- bulk using Magnetic Activated Cell Sorting (MACS).
JoVE General
Feeder-Free Adaptation, Culture and Passaging of Human IPS Cells using Complete KnockOut Serum Replacement Feeder-Free Medium
The following protocol provides instruction for adapting human induced Pluripotent Stem (iPS) Cells to feeder-free culture using complete KnockOut Serum Replacement Feeder-Free medium (KSR-FF). Once adapted, instructions for continual maintenance are also provided.
JoVE General
Cryopreserving and Recovering of Human iPS Cells using Complete KnockOut Serum Replacement Feeder-Free Medium
This protocol describes the detailed procedure for cryopreserving human iPS cells in KnockOut SR cryopreservation medium and recovering these cells in complete KnockOut SR Feeder Free (KSR-FF) medium or feeder-based KnockOut SR medium.
JoVE Clinical and Translational Medicine
In vitro Organoid Culture of Primary Mouse Colon Tumors
1Department of Molecular & Integrative Physiology, University of Michigan, 2Department of Internal Medicine, Division of Gastroenterology, University of Michigan
A simple method to establish primary murine colon tumor organoid is described. This method utilizes the feature that colon tumor cells survive and grow into organoids in media containing limited growth factors, whereas normal colon epithelial do not.
JoVE Neuroscience
Micromanipulation of Gene Expression in the Adult Zebrafish Brain Using Cerebroventricular Microinjection of Morpholino Oligonucleotides
In this article, we demonstrate a method for manipulation of gene expression in the ventricular cells of the adult zebrafish telencephalon using antisense morpholino oligonucleotides. We present this method as an efficient and quick protocol that can be used for functional studies in the adult vertebrate brain.
JoVE General
Planarian Immobilization, Partial Irradiation, and Tissue Transplantation
1Department of Neurobiology and Anatomy, University of Utah School of Medicine, 2Department of Molecular, Cellular and Developmental Biology, UCSB, 3Howard Hughes Medical Institute, 4Stowers Institute for Medical Research
An effective method for grafting tissue of defined and consistent size between planaria is described. Also included is a description of how the immobilization technique used for transplantation can be adapted, in conjunction with lead shields, for the partial irradiation of live animals.
JoVE General
Isolation of Retinal Stem Cells from the Mouse Eye
Molecular Genetics, University of Toronto
In this video, we will demonstrate how to isolate retinal stem cells from the ciliary epithelium of the mouse eye and grow them in culture to form clonal retinal spheres. The spheres that are isolated possess the cardinal properties of stem cells: self-renewal and multipotentiality.
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 Neuroscience
Isolation and Expansion of the Adult Mouse Neural Stem Cells Using the Neurosphere Assay
1 Department of Anatomical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran, 2Department of Neurosurgery, University of Florida
This video protocol demonstrates the neurosphere assay method to generate and expand neural stem cells from the adult mouse periventricular region, and provides technical insights to ensure one can achieve reproducible neurosphere cultures.
JoVE Clinical and Translational Medicine
Labeling Stem Cells with Ferumoxytol, an FDA-Approved Iron Oxide Nanoparticle
1Department of Radiology, Molecular Imaging Program at Stanford (MIPS), 2Stanford School of Medicine, Stanford University
We describe a technique for labeling and tracking stem cells with FDA-approved, superparamagnetic iron oxide (SPIO), ferumoxytol (Feraheme). This cellular imaging technique that utilizes magnetic resonance (MR) imaging for visualization, is readily accessible for long-term monitoring and diagnosis of successful or unsuccessful stem cell engraftments in patients.
JoVE Neuroscience
Generation of Neural Stem Cells from Discarded Human Fetal Cortical Tissue
1Department of Neurology, Beth Israel Deaconess Medical Center, 2Department of Obstetrics and Gynecology, Brigham and Women's Hospital, 3Department of Pathology, Beth Israel Deaconess Medical Center, 4Department of Pathology, Division of Neuropathology, Brigham and Women's Hospital
A simple and reliable method on isolation and culture of neural stem cells from discarded human fetal cortical tissue is described. Cultures derived from known human neurological disorders can be used for characterization of pathological cellular and molecular processes, as well as provide a platform to assess pharmacological efficacy.
JoVE General
Generation of Human Induced Pluripotent Stem Cells from Peripheral Blood Using the STEMCCA Lentiviral Vector
1Center for Regenerative Medicine (CReM), Boston University School of Medicine, 2Department of Hematology, Children's Hospital of Philadelphia, 3Center for Cellular and Molecular Therapeutics, Children's Hospital of Philadelphia
Here we show a simple and effective protocol for the generation of human iPSCs from 3-4 ml of peripheral blood using a single lentiviral reprogramming vector. Reprogramming of readily available blood cells promises to accelerate the utilization of iPSC technology by making it accessible to a broader research community.
JoVE General
Isolating Stem Cells from Soft Musculoskeletal Tissues
1Stem Cell Research Center, Childrens Hospital of Pittsburgh of UPMC, 2Department of Bioengineering, University of Pittsburgh, 3Department of Orthopedic Surgery, University of Pittsburgh, 4Department of Pathology, University of Pittsburgh, 5Department of Molecular Genetics & Biochemistry, University of Pittsburgh
Isolating adult stem cells from musculoskeletal soft tissues based on the cell's adherence speed to flask.
JoVE General
Isolation & Characterization of Hoechstlow CD45negative Mouse Lung Mesenchymal Stem Cells
1Charles C. Gates Regenerative Medicine and Stem Cell Biology Program, University of Colorado Denver, 2Department of Medicine, University of Colorado Denver, 3Cancer Center, University of Colorado Denver, 4Webb Waring Institute, University of Colorado Denver
In this article we demonstrate the isolation of murine resident lung mesenchymal stem cells (lung MSC), their expansion, characterization and analysis of immunomodulatory properties.
JoVE General
Isolation of Early Hematopoietic Stem Cells from Murine Yolk Sac and AGM
1Department of Hematology and Oncology, Brigham and Women's Hospital and Harvard Medical School, 2Department of Cell Biology and Genetics, Erasmus University Medical Center, 3Department of Medicine, Howard Hughes Medical Institute, Brigham and Women's Hospital and Harvard Medical School
This video shows how to micro-dissect the yolk sac and aorta-gonad-mesonephros region from embryos and use flow cytometry to sort hematopoietic stem cells.
JoVE Neuroscience
Isolating Nasal Olfactory Stem Cells from Rodents or Humans
1NICN, Aix Marseille University, 2LNPM, Aix Marseille University, 3ENT Department, Aix Marseille University, 4Gene expression Laboratory, The Salk Institute for Biological Studies, 5Laboratory of Speech and Language, Aix Marseille University, 6Centre d'Investigations Cliniques en Biothérapie, Aix Marseille University
We describe here a method for biopsying olfactory mucosa from rat and human nasal cavities. These biopsies can be used for either identifying molecular anomalies in brain diseases or isolating multipotent adult stem cells that can be utilized for cell transplantation in animal models of brain trauma/disease.
JoVE General
Selecting and Isolating Colonies of Human Induced Pluripotent Stem Cells Reprogrammed from Adult Fibroblasts
1Department of Molecular Carcinogenesis and Center for Cancer Epigenetics, University of Texas M.D. Anderson Cancer Center, 2Department of Cell Biology, Poznan University of Medical Sciences, 3Department of Molecular Biology, The Scripps Research Institute
We present a protocol for efficient reprogramming of human somatic cells into human induced pluripotent stem cells (hiPSC) using retroviral vectors encoding Oct3/4, Sox2, Klf4 and c-myc (OSKM) and identification of correctly reprogrammed hiPSC by live staining with Tra-1-81 antibody.
JoVE General
Isolation of CD133+ Liver Stem Cells for Clonal Expansion
1Department of Pediatrics and Pharmacology, Pennsylvania State College of Medicine, 2Department of Pharmacology, Pennsylvania State College of Medicine, 3Department of Pediatrics, University of California Los Angeles, School of Medicine
Here we describe the isolation of CD133 expressing liver stem cells and cancer stem cells from whole murine liver, a process that requires tissue digestion, cell enrichment, and flow cytometry isolation. We include methods for advanced single cell isolation and clonal expansion.
JoVE Neuroscience
The Neuroblast Assay: An Assay for the Generation and Enrichment of Neuronal Progenitor Cells from Differentiating Neural Stem Cell Progeny Using Flow Cytometry
1Department of Neurosurgery, The University of Florida, 2Laboratory for Stem Cell Research, Department of Anatomical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
This video protocol demonstrates a novel method for the generation and subsequent purification of neuronal progenitor cells from a renewable source of neural stem cells (NSCs) based on their physical (size and internal granularity) and fluorescent properties using flow cytometry technology.
JoVE General
Transplantation of Cells Directly into the Kidney of Adult Zebrafish
Center for Regenerative Medicine, Massachusetts General Hospital
Cell transplantation is an essential technique for studying tissue regeneration and for developing cell-based therapies of disease. We demonstrate here a microsurgical technique that permits the transplantation of genetically labeled cells directly into the kidney of adult zebrafish fish.
JoVE General
Lentiviral-mediated Knockdown During Ex Vivo Erythropoiesis of Human Hematopoietic Stem Cells
1The Sprott Center for Stem Cell Research, Regenerative Medicine Program, Ottawa Hospital Research Institute, 2Department of Cellular and Molecular Medicine, University of Ottawa
An ex vivo protocol to generate mature human red blood cells from hematopoietic stem/progenitors is described. Additionally we describe an efficient lentiviral-delivery method to knockdown the transcription factor TAL1 in primary erythroid cells. The efficiency of lentivirus mediated gene delivery is demonstrated using GFP expressing viruses.
JoVE General
Reprogramming Human Somatic Cells into Induced Pluripotent Stem Cells (iPSCs) Using Retroviral Vector with GFP
Yale Stem Cell Center, Department of Genetics, Yale School of Medicine
A method to generate human induced pluripotent stem cells (iPSCs) via retrovirus-mediated ectopic expression of OCT4, SOX2, KLF4 and MYC is described. A practical way to identify human iPSC colonies based on GFP expression is also discussed.
JoVE General
Generating iPS Cells from MEFS through Forced Expression of Sox-2, Oct-4, c-Myc, and Klf4
Whitehead Institute for Biomedical Research, Massachusetts Institute of Technology
This video shows the procedure for generating induced pluripotent stem cells using inducible lentivirus that express Oct4, Sox2, c-Myc and Klf4.
JoVE General
Immunofluorescent Detection of Two Thymidine Analogues (CldU and IdU) in Primary Tissue
We have derived a strategy to detect sequential incorporation of thymidine analogues (CldU and IdU) into tissues of adult mice to quantify two successive rounds of cell division. This strategy is useful to detect cell turnover of long-lived tissues, oncogenic transformation, or transit-amplifying cells.
JoVE Neuroscience
Establishing Embryonic Mouse Neural Stem Cell Culture Using the Neurosphere Assay
1Department of Anatomical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran, 2Department of Neurosurgery, The University of Florida
This video protocol demonstrates the application of the neurosphere assay for the isolation and expansion of neural stem cells from the ganglionic eminences of embryonic day 14-mouse brain.
JoVE General
Mouse Epidermal Neural Crest Stem Cell (EPI-NCSC) Cultures
1Institute of Human Genetics and Northeast England Stem Cell Institute, Newcastle University, 2Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin
Here we show our method to isolate mouse epidermal neural crest stem cells (EPI-NCSC). Technique involves micro-dissecting whisker follicles, isolating the bulge and placeing it into tissue culture. EPI-NCSC start to emigrate from bulge explants onto the substratum within 3 - 4 days.
JoVE General
Purification of Progenitors from Skeletal Muscle
The Biomedical Research Centre, University of British Columbia
Method for the enzymatic dissociation, surface labeling and purification by flow cytometry of fibro/adipogenic and myogenic progenitors from murine skeletal muscle.
JoVE General
Preparation of Mouse Embryonic Fibroblast Cells Suitable for Culturing Human Embryonic and Induced Pluripotent Stem Cells
Department of Vertebrate Genomics, Max Planck Institute for Molecular Genetics
The quality of mouse embryonic fibroblasts (MEFs) is dictated by the right strain of mouse such as CF-1. Pluripotency-supportive MEFs and conditioned media (CM) obtained from these should contain optimal concentrations of Activin A, Gremlin and Tgfβ1 needed for the Activin/Nodal and FGF pathways to co-operatively maintain self-renewal and pluripotency.
JoVE Bioengineering
Use of Human Perivascular Stem Cells for Bone Regeneration
1Dental and Craniofacial Research Institute and Section of Orthodontics, School of Dentistry, UCLA, 2UCLA and Orthopaedic Hospital, Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, UCLA, 3Department of Bioengineering, UCLA, 4Center for Cardiovascular Science, University of Edinburgh
Human perivascular stem cells (PSCs) are a novel stem cell class for skeletal tissue regeneration similar to mesenchymal stem cells (MSCs). PSCs can be isolated by FACS (fluorescence activated cell sorting) from adipose tissue procured during standard liposuction procedures, then combined with an osteoinductive scaffold to achieve bone formation in vivo.
JoVE Bioengineering
A Cre-Lox P Recombination Approach for the Detection of Cell Fusion In Vivo
1Department of Biomedical Engineering, University of Wisconsin-Madison, 2Department of Biomedical Engineering, Materials Science Program, Laboratory for Optical and Computational Instrumentation, University of Wisconsin-Madison
A method to track cell fusion in living organisms over time is described. The approach utilizes Cre-LoxP recombination to induce luciferase expression upon cell fusion. The luminescent signal generated can be detected in living organisms using biophotonic imaging systems with a sensitivity of detection of ˜1,000 cells in peripheral tissues.
JoVE General
A Quantitative Assay for Insulin-expressing Colony-forming Progenitors
1Department of Biotechnology & Bioinformatics, California State University Channel Islands, 2Department of Diabetes, Endocrinology and Metabolism, Beckman Research Institute of City of Hope, 3The Irell & Manella Graduate School of Biological Sciences, Beckman Research Institute of City of Hope
A three-dimensional clonogenic assay that allows pancreatic-like progenitors to differentiate into insulin-expressing colonies is described. This method takes advantage of semi-solid media containing methylcellulose, Matrigel and growth factors, in which single progenitors proliferate and differentiate in vitro, permitting quantification of the number of functional progenitors in a population.
JoVE General
Isolation of Basal Cells and Submucosal Gland Duct Cells from Mouse Trachea
Department of Pediatrics, David Geffen School of Medicine at UCLA
Here we demonstrate our protocol for isolation of basal and submucosal gland duct cells from mouse tracheas. We also demonstrate the method of injecting stem cells into the dorsal mouse fat pad to create an in vivo model of submucosal gland regeneration.
JoVE General
Generation of Mice Derived from Induced Pluripotent Stem Cells
1Dorris Neuroscience Center & Department of Cell Biology, The Scripps Research Institute, 2Mouse Genetics Core Facility, The Scripps Research Institute
Generating induced pluripotent stem cell (iPSC) lines produces lines of differing developmental potential even when they pass standard tests for pluripotency. Here we describe a protocol to produce mice derived entirely from iPSCs, which defines the iPSC lines as possessing full pluripotency1.
JoVE Neuroscience
Progenitor-derived Oligodendrocyte Culture System from Human Fetal Brain
1Laboratory of Molecular Medicine and Neuroscience, National Institute of Neurological Disorders and Stroke, National Institutes of Health, 2Laboratory of Neurophysiology, National Institute of Neurological Disorders and Stroke, National Institutes of Health
Primary, human fetal brain-derived, multipotential progenitor cells proliferate in vitro while maintaining the capacity to differentiate into neurons and astrocytes. This work shows that neural progenitors can be induced to differentiate through stages of the oligodendrocytic lineage by conditioning with select growth factors.
JoVE Neuroscience
The Specification of Telencephalic Glutamatergic Neurons from Human Pluripotent Stem Cells
1Department of Neuroscience, The University of Connecticut Health Center, 2Department of Genetics and Developmental Biology, The University of Connecticut Health Center, 3Stem Cell Institute, The University of Connecticut Health Center
This procedure yields telencephalic neurons by going through checkpoints which are similar to those observed during human development. The cells are allowed to spontaneously differentiate, are exposed to factors which push them towards the neural lineage, are isolated, and are plated onto coverslips to allow for terminal differentiation and maturation.
JoVE General
Bioengineering Human Microvascular Networks in Immunodeficient Mice
Department of Cardiac Surgery, Children's Hospital Boston, Harvard Medical School
Here, we describe a methodology to deliver human cord blood-derived endothelial colony-forming cells (ECFCs) and bone marrow-derived mesenchymal stem cells (MSCs), embedded in a collagen/fibronectin gel, subcutaneously into immunodeficient mice. This cell/gel combination generates a human vascular network that connects with the mouse vasculature.
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