the first enanomapper prototype: a substance database to ... · sofia, bulgaria . . 29 january 2015...
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The first eNanoMapper prototype: a substance database to support a
safe innovation approach
NINA JELIAZKOVA IdeaConsult Ltd. Sofia, Bulgaria
www.ideaconsult.net
29 January 2015
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FP7 eNanoMapper project
• Started Feb 2014, 3 years • Develop an ontology and database unifying
information about nanomaterial safety (in humans and the environment)
• Cover the full lifecycle from manufacturing to environmental decay or accumulation
• Pan-European project, 8 partners • Ontology growth through community and re-use
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Douglas Connect GmbH
3
Nat. Tech. Univ. of Athens, Greece
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Our vision
• (re)use open ontologies – CHEMINF, NPO, BAO, QUDT
• Based on OpenTox API – EU FP7 projects: OpenTox ToxBank – Open Source implementations (incl. ambit.sf.net )
• Application Programming Interfaces (APIs) – Allow bridging with data analysis tools – Exchange formats (ISA-TAB, RDF, …)
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Work packages
29 January 2015
This talk
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eNanomapper DB review (Q1 2014)
• 104 potential data sources.
• A subset of 34 were publicly available online on the Internet.
• Most of these sources don’t provide machine readable data
• Simple web pages : 18 • PDF documents : 10 • Excel tables : 3
• Database dumps : 3 • ISA-Tab-Nano format : 1 • IUCLID5 format : 1 • Semantic MediaWiki : 1 • Programmatic access
through a publicly available API : 4
• Only one source makes distinction between raw and processed data and provides access to both types of data.
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Contributed ~30 entries to the Spring 2014 NSC Database Survey
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Nanomaterials representation • Nanomaterials
– Core – Coating(s) – Linkage – Impurities – Components, internal
structure, etc. • Typical assay description
– Property – value (range of values) – units (Excel templates)
• More complex description: – Experimental graph (ISA-TAB
/ ISA-TAB-nano)
• Existing data models – BioAssay Ontology – OECD Harmonized Templates – CoDATA UDS – ISA-TAB- Nano
• Commonalities: – Materials sample – Protocols, protocol
parameters – Experimental conditions – Readouts
• Measurements, • Measurement groups, • Raw data, derived data
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The Experimental graph
Source Name
Characteristics [organism]
Characteristics [strain]
Protocol REF
Sample Name
Factor Value [limiting nutrient]
Factor Value [rate]
Unit
culture1 Saccharomyces cerevisiae
FY1679 growth protocol
C-0.07-aliquot1
carbon 0.07 l/hour
culture4 Saccharomyces cerevisiae
FY1679 growth protocol
N-0.07-aliquot1
nitrogen 0.07
l/hour
culture5 Saccharomyces cerevisiae
FY1679 growth protocol
N-0.1-aliquot1
nitrogen 0.1 l/hour
Source name Sample Name Protocol REF
Characteristics [organism]
Processed by
Characteristics [strain]
Factor Value [limiting nutrient]
Factor Value [rate] Unit Protocol Parameter
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ISA-TAB-Nano
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Existing data models (cont)
BioAssay Ontology CODATA Uniform Description System for Materials at the Nanoscale
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Experimental data • NPO
– distinguishes between endpoint of measurement and assay used to measure the endpoint, where the details of the assay could be specified
• DOI: 10.1007/s11051-013-1455-2 – “test” and “measurement” terms
• CODATA UDS – requires specification of how
particular property is measured. • ISA-TAB-Nano
– allows defining the qualities measured and detailed protocol conditions and instruments.
• The OECD guideline – defines the “test” or “test method”
as the experimental system used to obtain the information about a substance. The term “assay” is considered a synonym. The term “Testing” is defined as applying the test method.
– The endpoints recommended for testing of nanomaterials by OECD WPMN use the terms and categories from the OECD Harmonized Templates.
• Summary – Specify how a property is measured – The level of details in the OECD HT,
CODATA-UDS, ISA-TAB-Nano and available ontologies differ, which is due to their original focus.
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Existing data models: OECD Harmonized Templates
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Chemical /Toxicogenomics DB (no explicit NM support)
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NM: Carbon nanotube assays >200 fullerenes; metal oxides; silver nanoparticles; colloidal gold nanoparticles, etc.
NM: Fullerenes , Metal oxides
Gene expression data NM: carbon nanotubes, quantum dots, graphene oxide, zinc oxide, silver and gold nanoparticles.
Comparative Toxicogenomics Database Includes nanomaterial related data.
The ECHA Dissemination site. Registered chemical substances under REACH, including NM.
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Q: Why no common DB approach?
• Elucidating the data model is difficult
• Making the data model universal is difficult
• Reasons: – Material
• Uniqueness – Experimental data
• Complexity – Modelling
• Different requirements
Analogy: Chemical structures DB – Chemical structure and properties
• Inappropriate data model. Instead: – Substances - measured properties – Structures - calculated properties.
• Substances composition – Constituents, impurities, additives
• Nanomaterials – Core, coating(s), linkage – Composition – Also impurities
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What is a “Substance” • NPO:
– a Nanomaterial (NPO_199) is an equivalent class to chemical substance (NPO_1973)
– one of (nano-object, nanoparticle, engineered nanomaterial, nanostructured material, nanoparticle formulation).
– the chemical substance itself is a subclass of a chemical entity (NPO_1972). • DOI: 10.1007/s11051-013-1455-2 , . J. Nanoparticle Res. 2013, 15
– Compares the definition of the terms “substance” and “material” are in ISO, REACH and general science definitions of the terms. The paper notes the OECD HT definition of “reference substances” is very similar to the definition of the term “reference material”.
• REACH: http://echa.europa.eu/documents/10162/13643/nutshell_guidance_substance_en.pdf
– “Chemical substance, a material with a definite chemical composition” – The definition of a substance encompasses all forms of substances and materials
on the market, including nanomaterials; and may have complex composition.
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Substance (formaldehyde)
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Constituent
Impurity
Compositions
European Chemical Agency Registration dossier
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European Chemical Agency Registration dossier
Substance (25155-25-3)
Multi constituent substance
Reaction mass of ….
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Substance (formaldehyde)
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Constituent
Impurity
Additive
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Gold nanoparticle
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Core
Coating
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Substance, Material, Composition Substance (formaldehyde) Gold Nanoparticle
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Composition: Pure
Composition: Water solution,
additives, impurities
Core
Coating
Composition
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What we need to describe NM and related experiments
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eNanoMapper prototype database
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REST API documentation: http://enanomapper.github.io/API/
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Nanomaterials overview
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MWCNT
NANOWIKI
Protein Corona dataset
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Multi-Walled Carbon Nanotubes
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Source: ECHA Dissemination site • Subset of the data
manually entered in IUCLID 5.5 (for demonstration purposes)
• *.i5z file exported from IUCLDI5.5
• *.i5z file imported into the database
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MWCNT (Phys-chem)
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Prototype database (Protein Corona)
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Protein Corona Data set DOI:10.1021/nn406018q
Coating
Coating
Core
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Prototype database (Protein Corona)
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Prototype database (NanoWiki)
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NanoWiki : literature data Egon Willighagen (Karolinska Institutet, Maastricht University)
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NM components (NanoWiki)
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Prototype database: Phys chem & Tox (NanoWiki)
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NM toxicity (classifier)
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NM toxicity (numeric)
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Search by particle size
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Endpoint search (tox & pchem)
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Chemical similarity search
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Chemical similarity search (MES coating)
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NanoWiki
Protein Corona dataset
Coating
2-Mercaptoethanesulfonate
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Chemical substructure search
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NanoWiki
Protein Corona dataset
Coating
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Data upload
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Under development : • ISA-TAB-Nano import • More spreadsheet
templates
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REST Application Programming Interface
API documentation (Swagger-UI) Interactive API queries
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http://enanomapper.github.io/API/
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Data formats
Import formats eNanoMapper@gitHub
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• Available • Custom CSV • Custom RDF (NanoWiki) • IUCLID5 *.i5z
• Under development : • ISA-TAB-Nano parser • Configurable parser for
spreadsheet data templates, provided by NSC projects
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Data formats
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Parser for (mainly) spreadsheet data templates (under development)
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THANK YOU!
Questions?
29 January 2015