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2016 ; 33
(2
): 95-109
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Global analysis of publicly available safety data for 9,801 substances registered
under REACH from 2008-2014
#MMPMID26863090
Luechtefeld T
; Maertens A
; Russo DP
; Rovida C
; Zhu H
; Hartung T
ALTEX
2016[]; 33
(2
): 95-109
PMID26863090
show ga
The European Chemicals Agency (ECHA) warehouses the largest public dataset of in
vivo and in vitro toxicity tests. In December 2014 this data was converted into a
structured, machine readable and searchable database using natural language
processing. It contains data for 9,801 unique substances, 3,609 unique study
descriptions and 816,048 study documents. This allows exploring toxicological
data on a scale far larger than previously possible. Substance similarity
analysis was used to determine clustering of substances for hazards by mapping to
PubChem. Similarity was measured using PubChem 2D conformational substructure
fingerprints, which were compared via the Tanimoto metric. Following K-Core
filtration, the Blondel et al. (2008) module recognition algorithm was used to
identify chemical modules showing clusters of substances in use within the
chemical universe. The Global Harmonized System of Classification and Labelling
provides a valuable information source for hazard analysis. The most prevalent
hazards are H317 ?May cause an allergic skin reaction? with 20% and H318 ?Causes
serious eye damage? with 17% positive substances. Such prevalences obtained for
all hazards here are key for the design of integrated testing strategies. The
data allowed estimation of animal use. The database covers about 20% of
substances in the high-throughput biological assay database Tox21 (1,737
substances) and has a 917 substance overlap with the Comparative Toxicogenomics
Database (~7% of CTD). The biological data available in these datasets combined
with ECHA in vivo endpoints have enormous modeling potential. A case is made that
REACH should systematically open regulatory data for research purposes.
|*Databases, Factual
[MESH]
|Animals
[MESH]
|Computational Biology/methods
[MESH]
|Drug-Related Side Effects and Adverse Reactions
[MESH]