Preliminary safety assessment of C–8 xylitol monoester and xylitol phosphate esters

International Journal of Cosmetic Science - Tập 38 Số 1 - Trang 41-51 - 2016
Jefferson E. Silveira1, Maria Claudia Pereda2, Cecília Nogueira2, Gustavo de Campos Dieamant1, Camila Kappke Cesar2, K. M. Assanome3, M. S. Silva1, Cristiane Okuda Torello1, Mary L.S. Queiroz1, Samara Eberlin1
1Department of Pharmacology/Hemocenter, Faculty of Medical Science, State University of Campinas (Unicamp), Campinas, SP, Brazil.
2Research and Development Department Chemyunion Química Ltda Sorocaba SP Brazil
3State University of Campinas (Unicamp) Department of Pharmacology/ Hemocenter, Faculty of Medical Science Campinas SP Brazil

Tóm tắt

SynopsisObjectivesMost of the cosmetic compounds with preservative properties available in the market pose some risks concerning safety, such as the possibility of causing sensitization. Due to the fact that there are few options, the proper development of new molecules with this purpose is needed. Xylitol is a natural sugar, and the antimicrobial properties of xylitol‐derived compounds have already been described in the literature. C‐8 xylitol monoester and xylitol phosphate esters may be useful for the development of skincare products. As an initial screen for safety of chemicals, the combination of in silico methods and in vitro testing can aid in prioritizing resources in toxicological investigations while reducing the ethical and monetary costs that are related to animal and human testing. This study was designed to evaluate the safety of C‐8 xylitol monoester and xylitol phosphate esters regarding carcinogenicity, mutagenicity, skin and eye irritation/corrosion and sensitization through alternative methods.MethodsFor the initial safety assessment, quantitative structure‐activity relationship methodology was used. The prediction of the parameters carcinogenicity/mutagenicity, skin and eye irritation/corrosion and sensitization was generated from the chemical structure. The analysis also comprised physical–chemical properties, Cramer rules, threshold of toxicological concern and Michael reaction. In silico results of candidate molecules were compared to 19 compounds with preservative properties that are available in the market. Additionally, in vitro tests (Ames test for mutagenicity, cytotoxicity and phototoxicity tests and hen's egg test – chorioallantoic membrane for irritation) were performed to complement the evaluation.ResultsIn silico evaluation of both molecules presented no structural alerts related to eye and skin irritation, corrosion and sensitization, but some alerts for micronucleus and carcinogenicity were detected. However, by comparison, C‐8 xylitol monoester, xylitol phosphate esters showed similar or better results than the compounds available in the market. Concerning experimental data, phototoxicity and mutagenicity results were negative. As expected for compounds with preservative activity, xylitol‐derived substances presented positive result in cytotoxicity test. In hen's egg test, both molecules were irritants.ConclusionOur results suggested that xylitol‐derived compounds appear to be suitable candidates for preservative systems in cosmetics.

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International Journal of Cosmetic Science

Tập 38 Số 1

41-51

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