1Medical Research Council (MRC), Cell Biology Unit and Laboratory for Molecular Cell Biology, University College London
Inositol pyrophosphates play an important role in human pathologies such cancer, diabetes and obesity; however, the exact mechanism of action is a matter of dispute. The lack of commercially available inositol pyrophosphates renders detailed studies problematic. Here we describe a simple protocol to produce and isolate milligrams of inositol pyrophosphates.
Published September 3, 2011. Keywords: Molecular Biology, Polyacrilamyde Gel Electrophoresis (PAGE), inositol hexakisphosphate (IP6), phytic acid, diphosphoinositol pentakisphosphate (IP7), bisdiphoshoinositol tetrakisphosphate (IP8), IP6-kinase (IP6K), PP-IP5K, VIP1
JoVE Immunology and Infection
1Department of Immunotherapeutics (Medinet), University of Tokyo Hospital, 2MEDINET Co., Ltd
A method to expand γδ T cells from peripheral blood mononuclear cells (PBMC) is described. PBMC-derived γδ T cells are stimulated and expanded using zoledronate and interleukin-2 (IL-2). Large scale expansion of γδ T cells can be applied to autologous cellular immunotherapy of cancer.
Published September 9, 2011. Keywords: Immunology, γδ T Cell, zoledronate, PBMC, peripheral blood mononuclear cells
1Department of Neurology, Massachusetts General Hospital
We present a rapid and inexpensive screening method for identifying transcriptional regulators using high-throughput robotic transfections and a homemade dual-glow luciferase assay. This protocol rapidly generates direct side-by-side functional data for thousands of genes and is easily modifiable to target any gene of interest.
Published June 1, 2014. Keywords: Cellular Biology, Luciferases, Gene Transfer Techniques, Transfection, High-Throughput Screening Assays, Transfections, Robotics
1Department of Chemistry and Biochemistry, University of Bern
The protocol described herein aims to explain and abridge the numerous obstacles in the way of the intricate route leading to modified nucleoside triphosphates. Consequently, this protocol facilitates both the synthesis of these activated building-blocks and their availability for practical applications.
Published April 3, 2014. Keywords: Chemistry, Nucleic acid analogues, Bioorganic Chemistry, PCR, primer extension reactions, organic synthesis, PAGE, HPLC, nucleoside triphosphates
1Center for Biotechnology Education, Krieger School of Arts and Sciences, Johns Hopkins University, 2Qiagen Sciences, Inc.
Pyrosequencing is a versatile technique that facilitates microbial genome sequencing that can be used to identify bacterial species, discriminate bacterial strains, and detect genetic mutations that confer resistance to anti-microbial agents. In this video, the procedure for microbial amplicon generation, amplicon pyrosequencing, and DNA sequence analysis will be demonstrated.
Published August 22, 2013. Keywords: Microbiology, Genetics, Molecular Biology, Basic Protocols, Genomics, Eukaryota, Bacteria, Viruses, Bacterial Infections and Mycoses, Virus Diseases, Diagnosis, Therapeutics, Equipment and Supplies, Technology, Industry, and Agriculture, Life Sciences (General), Pyrosequencing, DNA, Microbe, PCR, primers, Next-Generation, high-throughput, sequencing
1Department of Genetics and Biochemistry, Clemson University
A method for the determination of acetate kinase activity is described. This assay utilizes a direct reaction for determining enzyme activity and kinetics of acetate kinase in the acetate-forming direction with different phosphoryl acceptors. Furthermore, this method can be utilized for assaying other acetyl phosphate or acetyl-CoA utilizing enzymes.
Published December 19, 2011. Keywords: Molecular Biology, Acetate kinase, acetate, acetyl phosphate, pyrophosphate, PPi, ATP
JoVE Immunology and Infection
1Center for Molecular Bacteriology and Infection, Imperial College London
The larva of the wax moth Galleria mellonella was recently established as an in vivo model to study Legionella pneumophila infection. Here, we demonstrate fundamental techniques to characterize the pathogenesis of Legionella in the larvae, including inoculation, measurement of bacterial virulence and replication as well as extraction and analysis of infected hemocytes.
Published November 22, 2013. Keywords: Infection, Bacterial Infections, Infection, Disease Models, Animal, Bacterial Infections and Mycoses, Galleria mellonella, Legionella pneumophila, insect model, bacterial infection, Legionnaires' disease, haemocytes
1Department of Pharmacology and Toxicology, University of Toronto
This article details the enrichment of proteins associated with the synaptic plasma membrane by ultracentrifugation on a discontinuous sucrose gradient. The subsequent preparation of post-synaptic density proteins is also described. Protein preparations are suitable for western blotting or 2D DIGE analysis.
Published September 3, 2014. Keywords: Neurobiology, brain, synapse, western blot, ultracentrifugation, SPM, PSD
JoVE Immunology and Infection
1Faculty of Medicine, Rappaport Institute, Technion - Israel Institute of Technology, 2The Pharmacy and Biochemistry Institute, Johannes Gutenberg University
This protocol describes the preparation of a synthetic tRNA substrate for the Entamoeba histolytica DNA/tRNA methyltransferase 2 (Dnmt2) homolog Ehmeth and the measure of its methyltransferase activity. This experimental approach can be used for investigating the activity of other Dnmt2 proteins.
Published October 19, 2010. Keywords: Immunology, tRNA, methylation, DNA methyltransferase 2, Entamoeba histolytica
1Departments of Chemistry and Materials Science and Engineering, University of Utah
This article will describe the procedure for synthesizing a hydrophobically modified Nafion enzyme immobilization membrane and how to immobilize proteins and/or enzymes within the membrane and test their specific activity.
Published July 11, 2012. Keywords: Bioengineering, Materials Science, Chemical Engineering, enzyme immobilization, polymer modification, Nafion, enzyme stabilization, enzyme activity assays