JoVE Immunology and Infection
1Department of Microbiology and Immunology, The Geisel School of Medicine at Dartmouth
Here we report a method for using type I and type II Δku80 strains of Toxoplasma gondii to efficiently generate targeted gene deletions and gene replacements for functional genomic analysis.
Published July 12, 2013. Keywords: Infectious Diseases, Genetics, Microbiology, Infection, Medicine, Immunology, Molecular Biology, Cellular Biology, Biomedical Engineering, Bioengineering, Genomics, Parasitology, Pathology, Apicomplexa, Coccidia, Toxoplasma, Genetic Techniques, Gene Targeting, Eukaryota, Toxoplasma gondii, genetic manipulation, gene targeting, gene deletion, gene replacement, gene tagging, homologous recombination, DNA, sequencing
1NIH Stem Cell Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, 2Craniofacial and Skeletal Diseases Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health
Here, we present human pluripotent stem cell (hPSC) culture protocols, based on non-colony type monolayer (NCM) growth of dissociated single cells. This new method, utilizing Rho-associated kinase inhibitors or the laminin isoform 521 (LN-521), is suitable for producing large amounts of homogeneous hPSCs, genetic manipulation, and drug discovery.
Published July 24, 2014. Keywords: Stem Cell Biology, Pluripotent stem cells, human embryonic stem cells, induced pluripotent stem cells, cell culture, non-colony type monolayer, single cell, plating efficiency, Rho-associated kinase, Y-27632, transfection, transduction
1Disease Mechanism Research Core, RIKEN Brain Science Institute, 2Graduate School of Science and Engineering, Saitama University
The dendritic arborization sensory neurons of the Drosophila larval peripheral nervous system are useful models to elucidate both general and neuron class-specific mechanisms of neuron differentiation. We present a practical guide to generate and analyze dendritic arborization neuron genetic mosaics.
Published November 7, 2011. Keywords: Neuroscience, developmental biology, sensory neuron, Drosophila, larvae, immunohistochemistry, dendritic arborization neurons, peripheral nervous system, MARCM, Flp-out
1Program in Epithelial Biology, Stanford University School of Medicine
Tissue-specific analysis of a hair follicle regeneration model using lentivirus to mediate gain- or loss-of-function.
Published February 28, 2013. Keywords: Genetics, Tissue Engineering, Medicine, Biomedical Engineering, Cellular Biology, Surgery, Epithelial Biology, regeneration, chamber, hair, follicle, dermis, dermal cells, keratinocyte, graft, epithelial, cell culture, lentivirus, knockdown, shRNA-mediated knockdown, overexpression, mice, transgenic mice, animal model
1Boyce Thompson Institute for Plant Research, Cornell University
Mating and tetrad separation are required for genetic analysis in Chlamydomonas reinhardtii. Here we demonstrate standard methods for gametogenesis, mating, zygote germination and tetrad dissection. This protocol consists of an easy-to-follow series of steps that will make genetic approaches amenable to scientists who are less familiar with Chlamydomonas.
Published August 12, 2009. Keywords: Plant Biology, mating, zygote, tetrad, mating type, Chlamydomonas
1Division of Endocrinology and Metabolism, Department of Medicine, University of Miami Miller School of Medicine, 2Department of Molecular and Cellular Pharmacology, University of Miami Miller School of Medicine
Mutations in the kisspeptin receptor (KISS1R) are associated with reproductive disorders in patients. Here we describe how to introduce mutations of interest in the GC-rich sequence of KISS1R as well as the use of KISS1R constructs to characterize the degradation pathway of the receptor by immunoprecipitation and western blot.
Published September 4, 2011. Keywords: Genetics, GPR54, KISS1R, precocious puberty, membrane receptor, proteasome, degradation, GC-rich, site-directed mutagenesis, immunoprecipitation
1Department of Molecular Genetics, University of Toronto, 2Banting and Best Department of Medical Research, Donnelly Centre, University of Toronto, 3Department of Biochemistry, Research and Innovation Centre, University of Regina
Systematic, large-scale synthetic genetic (gene-gene or epistasis) interaction screens can be used to explore genetic redundancy and pathway cross-talk. Here, we describe a high-throughput quantitative synthetic genetic array screening technology, termed eSGA that we developed for elucidating epistatic relationships and exploring genetic interaction networks in Escherichia coli.
Published November 12, 2012. Keywords: Genetics, Molecular Biology, Medicine, Biochemistry, Microbiology, Aggravating, alleviating, conjugation, double mutant, Escherichia coli, genetic interaction, Gram-negative bacteria, homologous recombination, network, synthetic lethality or sickness, suppression
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 Biology and Pathology of Tumors, Unit of Molecular Biology, Platform of Immunomonitoring and Genetics, Centre Georges-François Leclerc
gDNA enrichment for NGS sequencing is an easy and powerful tool for the study of constitutional mutations. In this article, we present the procedure to analyse simply the complete sequence of 11 genes involved in DNA damage repair.
Published October 6, 2014. Keywords: Genetics, gDNA enrichment, Nextera, NGS, DNA damage, BRCA1, BRCA2
1Department of Biological Sciences, Rensselaer Polytechnic Institute
Mutation rates in young Saccharomyces cerevisiae cells measured through fluctuation tests are used to predict mutation frequencies for mother cells of different replicative ages. Magnetic sorting and flow cytometry are then used to measure actual mutation frequencies and age of mother cells to identify any deviations from predicted mutation frequencies.
Published October 16, 2014. Keywords: Microbiology, Aging, mutations, genome instability, Saccharomyces cerevisiae, fluctuation test, magnetic sorting, mother cell, replicative aging