PMID- 18343554 OWN - NLM STAT- MEDLINE DCOM- 20080710 LR - 20191210 IS - 0278-6915 (Print) IS - 0278-6915 (Linking) VI - 46 IP - 6 DP - 2008 Jun TI - Comparison of the skin sensitizing potential of unsaturated compounds as assessed by the murine local lymph node assay (LLNA) and the guinea pig maximization test (GPMT). PG - 1896-904 LID - 10.1016/j.fct.2008.01.019 [doi] AB - The skin sensitization potential of eight unsaturated and one saturated lipid (bio)chemicals was tested in both the LLNA and the GPMT to address the hypothesis that chemicals with unsaturated carbon-carbon double bonds may result in a higher number of unspecific (false positive) results in the LLNA compared to the GPMT. Seven substances (oleic acid, linoleic acid, linolenic acid, undecylenic acid, maleic acid, squalene and octinol) gave clear positive results in the LLNA (stimulation index (SI)> or = 3) and thus would require labelling as skin sensitizer. Fumaric acid and succinic acid gave clearly negative results. In the GPMT, besides some sporadic skin reactions, reproducible skin reactions indicating an allergic response were found in a few animals for four test substances. Based on the GPMT results, only undecylenic acid would have to be classified and labelled as a skin sensitizer according to the European Dangerous Substance Directive (67/548/EEC) (results for linoleic acid were inconclusive), while the other seven test substances would not require labelling. Possible mechanisms for unspecific skin cell stimulation and lymph node responses are discussed. In conclusion, the suitability of the LLNA for unsaturated compounds bearing structural similarity to the tested substances should be carefully considered and the GPMT should remain available as an accepted test method for skin sensitization hazard identification. FAU - Kreiling, R AU - Kreiling R AD - Clariant Produkte (Deutschland) GmbH, D-65840 Sulzbach, Germany. FAU - Hollnagel, H M AU - Hollnagel HM FAU - Hareng, L AU - Hareng L FAU - Eigler, D AU - Eigler D FAU - Lee, M S AU - Lee MS FAU - Griem, P AU - Griem P FAU - Dreessen, B AU - Dreessen B FAU - Kleber, M AU - Kleber M FAU - Albrecht, A AU - Albrecht A FAU - Garcia, C AU - Garcia C FAU - Wendel, A AU - Wendel A LA - eng PT - Comparative Study PT - Evaluation Study PT - Journal Article DEP - 20080120 PL - England TA - Food Chem Toxicol JT - Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association JID - 8207483 RN - 0 (Fatty Acids, Unsaturated) SB - IM MH - Animals MH - Dermatitis, Allergic Contact/*pathology MH - False Positive Reactions MH - Fatty Acids, Unsaturated/*toxicity MH - Female MH - Guinea Pigs MH - *Local Lymph Node Assay MH - Mice MH - Mice, Inbred CBA MH - Organ Size/drug effects MH - Reproducibility of Results MH - Structure-Activity Relationship MH - Toxicity Tests/*methods EDAT- 2008/03/18 09:00 MHDA- 2008/07/11 09:00 CRDT- 2008/03/18 09:00 PHST- 2007/09/26 00:00 [received] PHST- 2007/12/18 00:00 [revised] PHST- 2008/01/12 00:00 [accepted] PHST- 2008/03/18 09:00 [pubmed] PHST- 2008/07/11 09:00 [medline] PHST- 2008/03/18 09:00 [entrez] AID - S0278-6915(08)00041-0 [pii] AID - 10.1016/j.fct.2008.01.019 [doi] PST - ppublish SO - Food Chem Toxicol. 2008 Jun;46(6):1896-904. doi: 10.1016/j.fct.2008.01.019. Epub 2008 Jan 20.