PMID- 26048650 OWN - NLM STAT- MEDLINE DCOM- 20160523 LR - 20210702 IS - 1096-0929 (Electronic) IS - 1096-0929 (Linking) VI - 147 IP - 1 DP - 2015 Sep TI - A Dose-Response Modeling Approach Shows That Effects From Mixture Exposure to the Skin Sensitizers Isoeugenol and Cinnamal Are in Line With Dose Addition and Not With Synergism. PG - 68-74 LID - 10.1093/toxsci/kfv109 [doi] AB - Currently, hazard characterization of skin sensitizers is based on data obtained from studies examining single chemicals. Many consumer products, however, contain mixtures of sensitizers that might interact in such a way that the response induced by a substance is higher than predicted in the hazard assessment. To assess interaction of skin sensitizers in a mixture, a dose-response modeling approach is applied. With this approach, it is possible to assess whether or not responses from mixtures of sensitizers can be predicted from the dose-response information obtained from individual chemicals using dose addition. We selected the skin sensitizers isoeugenol and cinnamal, frequently occurring together in consumer products, to be examined in an adjusted local lymph node assay (LLNA). Cell number and cytokine production (IL-10 and IFN-gamma) of the auricular lymph nodes were measured as hallmarks of the skin sensitization response. We found that dose addition for these 2 skin sensitizers closely predicted the effects from mixtures of both chemicals across the broad dose range tested. Hence, isoeugenol and cinnamal show no synergistic effects in the LLNA. Therefore, hazard assessment and risk assessment of these substances can be performed without taking into account mixture exposure. CI - (c) The Author 2015. Published by Oxford University Press on behalf of the Society of Toxicology. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com. FAU - Kienhuis, Anne S AU - Kienhuis AS AD - *Centre for Health Protection and. FAU - Slob, Wout AU - Slob W AD - Centre for Nutrition, Prevention and Health Services, National Institute for Public Health and the Environment (RIVM), 3721 MA Bilthoven, The Netherlands. FAU - Gremmer, Eric R AU - Gremmer ER AD - *Centre for Health Protection and. FAU - Vermeulen, Jolanda P AU - Vermeulen JP AD - *Centre for Health Protection and. FAU - Ezendam, Janine AU - Ezendam J AD - *Centre for Health Protection and janine.ezendam@rivm.nl. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150604 PL - United States TA - Toxicol Sci JT - Toxicological sciences : an official journal of the Society of Toxicology JID - 9805461 RN - 0 (Complex Mixtures) RN - 0 (Cytokines) RN - 3T8H1794QW (Eugenol) RN - 5M0MWY797U (isoeugenol) RN - 7864XYD3JJ (Acrolein) RN - SR60A3XG0F (cinnamaldehyde) SB - IM MH - Acrolein/*analogs & derivatives/toxicity MH - Algorithms MH - Animals MH - Complex Mixtures/*toxicity MH - Cytokines/biosynthesis MH - Dermatitis, Allergic Contact/*pathology MH - Dose-Response Relationship, Drug MH - Drug Interactions MH - Drug Synergism MH - Eugenol/*analogs & derivatives/toxicity MH - Female MH - Local Lymph Node Assay MH - Lymph Nodes/metabolism MH - Mice MH - Mice, Inbred BALB C MH - Models, Biological MH - Risk Assessment OTO - NOTNLM OT - LLNA OT - dose addition OT - dose response OT - mixture OT - skin sensitization OT - synergism EDAT- 2015/06/07 06:00 MHDA- 2016/05/24 06:00 CRDT- 2015/06/07 06:00 PHST- 2015/06/07 06:00 [entrez] PHST- 2015/06/07 06:00 [pubmed] PHST- 2016/05/24 06:00 [medline] AID - kfv109 [pii] AID - 10.1093/toxsci/kfv109 [doi] PST - ppublish SO - Toxicol Sci. 2015 Sep;147(1):68-74. doi: 10.1093/toxsci/kfv109. Epub 2015 Jun 4.