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@ARTICLE{Calderazzo:144413,
author = {S. Calderazzo$^*$ and D. Tavel and M.-G. Zurich and A.
Kopp-Schneider$^*$},
title = {{M}odel-based estimation of lowest observed effect
concentration from replicate experiments to identify
potential biomarkers of in vitro neurotoxicity.},
journal = {Archives of toxicology},
volume = {93},
number = {9},
issn = {1432-0738},
address = {Heidelberg},
publisher = {Springer},
reportid = {DKFZ-2019-01866},
pages = {2635-2644},
year = {2019},
abstract = {A paradigm shift is occurring in toxicology following the
report of the National Research Council of the USA National
Academies entitled 'Toxicity testing in the 21st Century: a
vision and strategy'. This new vision encourages the use of
in vitro and in silico models for toxicity testing. In the
goal to identify new reliable markers of toxicity, the
responsiveness of different genes to various drugs
(amiodarone: 0.312-2.5 [Formula: see text]; cyclosporine A:
0.25-2 [Formula: see text]; chlorpromazine:
0.625-10 [Formula: see text]; diazepam: 1-8 [Formula: see
text]; carbamazepine: 6.25-50 [Formula: see text]) is
studied in 3D aggregate brain cell cultures. Genes'
responsiveness is quantified and ranked according to the
Lowest Observed Effect Concentration (LOEC), which is
estimated by reverse regression under a log-logistic model
assumption. In contrast to approaches where LOEC is
identified by the first observed concentration level at
which the response is significantly different from a
control, the model-based approach allows a principled
estimation of the LOEC and of its uncertainty. The Box-Cox
transform both sides approach is adopted to deal with
heteroscedastic and/or non-normal residuals, while estimates
from repeated experiments are summarized by a meta-analytic
approach. Different inferential procedures to estimate the
Box-Cox coefficient, and to obtain confidence intervals for
the log-logistic curve parameters and the LOEC, are
explored. A simulation study is performed to compare
coverage properties and estimation errors for each approach.
Application to the toxicological data identifies the genes
Cort, Bdnf, and Nov as good candidates for in vitro
biomarkers of toxicity.},
cin = {C060},
ddc = {610},
cid = {I:(DE-He78)C060-20160331},
pnm = {313 - Cancer risk factors and prevention (POF3-313)},
pid = {G:(DE-HGF)POF3-313},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31324950},
doi = {10.1007/s00204-019-02520-8},
url = {https://inrepo02.dkfz.de/record/144413},
}