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 JoVE Bioengineering

Rapid and Low-cost Prototyping of Medical Devices Using 3D Printed Molds for Liquid Injection Molding

1Department of Bioengineering & Therapeutic Sciences, University of California, San Francisco, 2Department of Obstetrics, Gynecology & Reproductive Sciences, University of California, San Francisco, 3Keck School of Medicine, University of Southern California


JoVE 51745

We have devised a method for low-cost and rapid prototyping of liquid elastomer rubber injection molded devices by using fused deposition modeling 3D printers for mold design and a modified desiccator as a liquid injection system.

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 JoVE Neuroscience

Modeling Astrocytoma Pathogenesis In Vitro and In Vivo Using Cortical Astrocytes or Neural Stem Cells from Conditional, Genetically Engineered Mice

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


JoVE 51763

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.

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 JoVE Biology

Transient Expression of Proteins by Hydrodynamic Gene Delivery in Mice

1Department of Biological Sciences, Hunter College, CUNY


JoVE 51481

In vivo transfection of naked DNA by hydrodynamic gene delivery introduces genes into the tissue of an animal with minimal inflammatory response. Sufficient amounts of gene product are generated such that gene function and regulation as well as protein structure and function can be analyzed.

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 JoVE Immunology and Infection

Infection of Zebrafish Embryos with Intracellular Bacterial Pathogens

1Department of Molecular Cell Biology, Institute of Biology, Leiden University, 2Department of Medical Microbiology and Infection Control, VU University Medical Center, 3Australian Regenerative Medicine Institute, Monash University


JoVE 3781

Transparent zebrafish embryos have proved useful model hosts to visualize and functionally study interactions between innate immune cells and intracellular bacterial pathogens, such as Salmonella typhimurium and Mycobacterium marinum. Micro-injection of bacteria and multi-color fluorescence imaging are essential techniques involved in the application of zebrafish embryo infection models.

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 JoVE Biology

Cell Labeling and Injection in Developing Embryonic Mouse Hearts

1INSERM UMR-910, Aix-Marseille University, 2Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego


JoVE 51356

We describe a series of methods to inject dyes, DNA vectors, virus, and cells in order to monitor both cell fate and phenotype of endogenous and grafted cells derived from embryonic or pluripotent cells within mouse embryos at embryonic day (E)9.5 and later stages of development.

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 JoVE Clinical and Translational Medicine

Ultrasound-guided Transthoracic Intramyocardial Injection in Mice

1Department of Cardiology, Boston Children's Hospital, 2Harvard Stem Cell Institute, Harvard University


JoVE 51566

Echocardiography-guided percutaneous intramyocardial injection represents an efficient, reliable, and targetable modality for the delivery of gene transfer agents or cells into the murine heart. Following the steps outlined in this protocol, the operator can quickly become competent in this versatile, minimally invasive technique.

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 JoVE Clinical and Translational Medicine

A Novel Surgical Approach for Intratracheal Administration of Bioactive Agents in a Fetal Mouse Model

1Molecular Virology and Gene Therapy, KU Leuven, 2Department of Woman and Child, KU Leuven, 3Neurobiology and Gene Therapy, KU Leuven, 4Division of Nuclear Medicine, KU Leuven, 5Biomedical NMR Unit/ MoSAIC, KU Leuven


JoVE 4219

We developed a novel surgical approach for intratracheal administration of bioactive agents into the mouse fetus. The delivery route is more efficient in targeting the fetal mouse lungs than the commonly used intra-amniotic injection. This procedure has to date not been described in a mouse model.

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 JoVE Environment

A Rapid and Efficient Method for Assessing Pathogenicity of Ustilago maydis on Maize and Teosinte Lines

1Department of Plant Pathology, University of Georgia


JoVE 50712

The use of a needle injection method to inoculate maize and teosinte plants with the biotrophic pathogen Ustilago maydis is described. The needle injection inoculation method facilitates the controlled delivery of the fungal pathogen in between the plant leaves where the pathogen enters the plant through the formation of appresoria. This method is highly efficient, enabling reproducible inoculations with U. maydis.

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 JoVE Clinical and Translational Medicine

Intramyocardial Cell Delivery: Observations in Murine Hearts

1Magdi Yacoub Institute, Imperial College London, 2National Heart and Lung Institute, Imperial College London, 3Australian Regenerative Medicine Institute, Monash University


JoVE 51064

Intramyocardial cell delivery in murine models of cardiovascular diseases, such as hypertension or myocardial infarction, is widely used to test the therapeutic potential of different cell types in regenerative studies. Therefore, a detailed description and a clear visualization of this surgical procedure will help to define the limits and advantages of cardiovascular cell therapeutic analyses in small rodents.

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 JoVE Neuroscience

Paired Nanoinjection and Electrophysiology Assay to Screen for Bioactivity of Compounds using the Drosophila melanogaster Giant Fiber System

1Department of Biological Sciences, Florida Atlantic University, 2Department of Chemistry & Biochemistry, Florida Atlantic University


JoVE 3597

A rapid in vivo assay to test for neuromodulatory compounds using the Giant Fiber System (GFS) of Drosophila melanogaster is described. Nanoinjections in the head of the animal along with electrophysiological recordings of the GFS can reveal bioactivity of compounds on neurons or muscles.

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