PMID- 21370839 OWN - NLM STAT- MEDLINE DCOM- 20110923 LR - 20151119 IS - 1520-5010 (Electronic) IS - 0893-228X (Linking) VI - 24 IP - 4 DP - 2011 Apr 18 TI - Impact of a heteroatom in a structure-activity relationship study on analogues of phenyl glycidyl ether (PGE) from epoxy resin systems. PG - 542-8 LID - 10.1021/tx100417r [doi] AB - Epoxy resins are among the most common causes of occupational contact dermatitis. They are normally used in so-called epoxy resin systems (ERS). These commercial products are combinations of epoxy resins, curing agents, modifiers, and reactive diluents. The most frequently used resins are diglycidyl ethers based on bisphenol A (DGEBA) and bisphenol F (DGEBF). In this study, we have investigated the contact allergenic properties of a series of analogues to the reactive diluent phenyl glycidyl ether (PGE), all with similar basic structures but with varying heteroatoms or with no heteroatom present. The chemical reactivity of the compounds in the test series toward the hexapeptide H-Pro-His-Cys-Lys-Arg-Met-OH was investigated. All epoxides were shown to bind covalently to both cysteine and proline residues. The percent depletion of nonreacted peptide was also studied resulting in ca. 60% depletion when using either PGE, phenyl 2,3-epoxypropyl sulfide (2), or N-(2,3-epoxypropyl)aniline (3), and only 15% when using 1,2-epoxy-4-phenylbutane (4) at the same time point. The skin sensitization potencies of the epoxides using the murine local lymph node assay (LLNA) were evaluated in relation to the observed physicochemical and reactivity properties. To enable determination of statistical significance between structurally closely related compounds, a nonpooled LLNA was performed. It was found that all investigated compounds containing a heteroatom in the alpha-position to the epoxide were strong sensitizers, congruent with the reactivity data, indicating that the impact of a heteroatom is crucial for the sensitizing capacity for this type of epoxides. FAU - Niklasson, Ida B AU - Niklasson IB AD - Department of Chemistry, Dermatochemistry and Skin Allergy, University of Gothenburg, Gothenburg, Sweden. FAU - Delaine, Tamara AU - Delaine T FAU - Luthman, Kristina AU - Luthman K FAU - Karlberg, Ann-Therese AU - Karlberg AT LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110329 PL - United States TA - Chem Res Toxicol JT - Chemical research in toxicology JID - 8807448 RN - 0 (Aniline Compounds) RN - 0 (Epoxy Compounds) RN - 0 (Epoxy Resins) RN - 0 (H-Pro-His-Cys-Lys-Arg-Met-OH) RN - 0 (Oligopeptides) RN - 0 (Phenyl Ethers) RN - 0 (Sulfides) RN - 44KJQ1655I (phenylglycidyl ether) SB - IM MH - Aniline Compounds/chemical synthesis/*chemistry/toxicity MH - Animals MH - Epoxy Compounds/chemical synthesis/*chemistry/toxicity MH - Epoxy Resins/*chemistry MH - Female MH - Lymph Nodes/drug effects MH - Mice MH - Mice, Inbred CBA MH - Oligopeptides/chemistry MH - Phenyl Ethers/*chemistry/toxicity MH - Structure-Activity Relationship MH - Sulfides/chemical synthesis/*chemistry/toxicity EDAT- 2011/03/05 06:00 MHDA- 2011/09/29 06:00 CRDT- 2011/03/05 06:00 PHST- 2011/03/05 06:00 [entrez] PHST- 2011/03/05 06:00 [pubmed] PHST- 2011/09/29 06:00 [medline] AID - 10.1021/tx100417r [doi] PST - ppublish SO - Chem Res Toxicol. 2011 Apr 18;24(4):542-8. doi: 10.1021/tx100417r. Epub 2011 Mar 29.