Phenotype MicroArrays: A Platform for Phenotypic Characterization of Cells and Species Description
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1 Stacy O. Montgomery, Ph.D. ICCC12 Florianopolis Brazil 30 Sept Phenotype MicroArrays: A Platform for Phenotypic Characterization of Cells and Species Description
2 Agenda Microbial Identification (MI) Fundamental Technology Phenotype MicroArray (PM) Technology PM Technology for Gene Function PM Technology for Drug Discovery PM Technology for Strain Characterization Fungal Applications
3 Primary Markets Industrial QC Clinical Food & Water Biolog Fundamental Technology Veterinary Environmental Agriculture Microbial Ecology Research & Education
4 Chemistry Platform: Carbon Utilization Patterns begin developing in as little as 4 hours
5 Species are DEFINED by Patterns of Utilization
6 Universal Reporter System - Respiration N Carbon P S Transport Catabolism Small molecule biosynthesis Macromolecular synthesis Synthesis of cellular structures Growth NADH Electron transport in membrane or mitochondria TV ox (colorless) TV red (purple)
7 Biolog GEN III System No pre-categorization: no gram stain, oxidase, catalase No additional follow-on tests One test panel for both GN and GP One minute set up One color change Over 1300 taxa Provides biologically relevant information
8 Phenotype MicroArrays Scanning 2000 Pathways of E. coli
9 Why Measure Cellular Phenotypes? DNA RNA PROTEIN PHENOTYPE Affymetrix, 1993 O Farrell, 1975 Biolog, 2001 Molecular Analyses Cellular Analysis
10 Measure 2000 Phenotypes Carbon Pathways N P S Biosynthetic Pathways Nitrogen Pathways Osmotic & Ion Effects ph Effects Sensitivity to Chemicals
11 Comparing Two Cell Lines Add cell A Add cell B OmniLog PM System PM Kinetic Result PM Pattern
12 PM Platform Comparing Two Cell Lines OmniLog PM System PM Kinetic Result PM Pattern 1 hr Automatic hr
13 Metabolic Curves Compared Control Experiment Metabolism Metabolism Time Time Metabolism Comparison Phenotypic differences: (Lag, Slope, Max) Metabolic differences Time
14 Cellular Pathways Phenotypes
15 Inhibitors Knockout Various Pathways X X X X X X X X
16 Phenotype MicroArray Applications Testing Cell Lines with Genetic Differences Determining Gene Function Testing Cell Lines Exposed to Drugs / Chemicals Evaluating New Drug Candidates Direct Testing of Cell Lines Strain Description Strain Characterization Optimizing Growth Conditions / Production Characteristics Testing Cells for Phenotypic Stability QA / QC of cell lines
17 Phenotype MicroArray Testing Genetic Effects on Cells
18 Assaying Genetic Changes Genotype Phenotype MicroArrays Phenotype Knock out a gene Which phenotypes change? Compare Mutant to Wild Type to Determine Gene Function
19 E. coli malf::tn10 vs MG1655 Dextrin Maltose Maltotriose tetracyclines tetracyclines Red = Phenotypes Lost Green = Phenotypes Gained
20 aminoglycosides E. coli oxyr::kan vs MG1655
21 Phenotype MicroArrays Direct Testing of Cell Lines
22 sorbitol Comparison of Strains Pathogenic (0157) and non-pathogenic (MG1655) E. coli tellurite
23 Culturing an Obligate Intracellular Pathogen
24 Annotation of Transporter Genes in P. aeruginosa Ian Paulsen and coworkers (PLoS Genetics, Sept. 2008) examined phenotypes of knockouts of transporter genes and compared them with functional annotations based on DNA homology. Only 12/27 (44%) precisely matched predicted annotation In 10/27 (37%) a more precise annotation was obtained In 5/27 (18%) a significant reannotation was enabled Novel transporters were identified for L-glutamate, N-acetyl-L-glutamate, hydroxy-l-proline, and histamine
25 Phenotype MicroArrays Testing the Effects of Chemicals
26 Testing & Evaluating Drugs Add cells Add cells + drug OmniLog PM System PM Pattern Patterns based on effect of drug under 2000 different growth conditions Bioinformatics Analysis
27 Drug Interactions 1 MIC Antagonism [Cpd B] Indifference 1/2 MIC Synergy 0 MIC 0 MIC 1/2 MIC [Cpd A] 1 MIC
28 Isoblograms: Indifference 1 Classical 1 Gradient No Growth [Cpd B] / MIC Growth [Cpd B] / MIC Growth Gradient [Cpd A] / MIC [Cpd A] / MIC
29 Isobolograms of Antibiotics Tested in S. aureus Time at Maximal Growth Rate (Hr) 1.5 Synergy 1.5 Indifference 1.5 Antagonism [Em] / MIC [Tet] / MIC [Em] / MIC [Nor] / MIC Em = Erythromycin Tet = Tetracycline Nor = Norfloxacin
30 Cluster Inhibitors into Groups Additivity Antagonism Synergy Oxolinic Acid Ofloxacin Norfloxacin Nalidixic acid Phleomycin Tetracycline_2 Tetracycline_3 Tetracycline_1 Doxycycline Chlormaphenicol Erythromycin Oleandomycin Puromycin Cefotaxime Cefazolin Cefamandole Naftate Streptomycin Amikacin Topoisomerase IV inhibitors DNA Gyrase /DNA Nicking Tetracyclines Macrolides Cephalosporins Aminoglycosides Similar Mechanisms of Action
31 Fungal Applications
32 Metabolic Profiling of Closely Related Fungi
33 Metabolic Profiling of Closely Related Fungi Range of substrate utilization Growth Antimicrobial properties Secondary metabolite production Dereplication of closely related strains
34 M. Singh J. Micro. Methods (2009) 77:102
35 Substrate Utilization
36 Anti-microbial Activity
37 Target Compound Levels
38 Phomopsis spp. Dereplication
39 Induction of Toxin Synthesis in Fusarium
40 Insertion of TRI5 GFP at the TRI5 locus
41 Culture Conditions Inducing Toxin Synthesis Culture conditions inducing synthesis of a trichothecene mycotoxin in the wheat pathogen, Fusarium graminearum. Induction was highest with arginine, putrescine, agmatine, and guanine as nitrogen sources. D. Gardiner et al Fungal Gen & Biol (2009)
42 Growth Independent Induction
43 In vitro vs. In planta
44 Carbon Source Dependent Sporulation
45 Carbon Source Dependent Sporulation Hypocrea atroviridis is frequently used as a photomorphogenetic model due to its ability to conidiate upon exposure to light. Light is thereby believed to be the primary trigger for spore formation. In contrast, we show here that conidiation is primarily carbon source dependent and that illumination plays a catalytic role;
46 Carbon Source Dependent Sporulation
47 Carbon Source Dependent Sporulation Of a total of 95 tested carbon sources, only a small set of carbohydrates, polyols, and sugar acids allowed conidiation in darkness, and on most of them, conidiation was significantly more strongly expressed in light. In addition, there are also a number of carbon sources on which H. atroviridis conidiates in darkness, but light does not further stimulate the process. Yet on another small set of carbon sources (L-sorbitol, D-fucose, D- and L-arabinose, and erythritol), H. atroviridis shows better sporulation in darkness than in light. No sporulation was observed on organic acids and amino acids.
48 Advantage of PM uses in Various Applications Advantages: Robust and straightforward technology Automated incubation and data collection Complementary to genomic and proteomic technologies Bacterial, fungal and mammalian Cells Applications: Quality assurance of stock or reference cultures Understanding metabolism in cells for basic research Functional genomics Inferring MOA of new drug compounds Pathogen host interactions Optimal conditions for growth, selection of specialized cell lines, development of selective assays
49 OmniLog PM Data Analysis
50 OmniLog PM Software
51 OmniLog PM Software
52 OmniLog PM Software
53 OmniLog PM Software
54 OmniLog PM Software
55 OmniLog PM Software
56 OmniLog PM Software
Phenotype MicroArray Product Guide
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