title: In vitro cytotoxicity and phototoxicity study of cosmetics colorants.
abstract: The aim of the work was early identification of preventable risk factors connected with the consumers usage of products of everyday use, such as cosmetics, toys and children products, and other materials intended for contact with human skin. The risk factor is represented by substances with irritation potential and subsequent possible sensitisation, resulting in negative impact on human physical and psychical health with social and societal consequences. The legislation for cosmetics, chemical substances and other products requires for hazard identification the application of alternative toxicological methods in vitro without the use of animals. For this reason we used a battery of alternative assays in vitro, based on cell cultures. Progressive methods of molecular biology, based on fluorimetry and fluorescence, were employed for identification of early morphological and functional changes on cellular level. Four colorants frequently used in cosmetics (P-WS Caramel, Chlorophyllin, Unicert Red K 7054-J and Unicert Red K 7008-J) were tested on cell line NIH3T3 (mouse fibroblast cell) and 3T3 Balb/c with/without UV irradiation (dose 5 J cm(-2)). Fluorescence methods for the study of cell damage using fluorescence probes offer results for the evaluation of cytotoxicity and cell viability of adherent cells. We detected intracellular production of ROS investigated by molecular probe CM-H(2)DCFDA, which is primarily sensitive to the increased production of hydrogen peroxide or its downstream products. Toxic effects on the cellular level were identified by viability tests using Neutral Red uptake and MTT assay, where the live cells reduce yellow soluble 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) to insoluble formazan crystals. The reaction was investigated on mitochondrial membrane of living cells and the type of cell death was determined using Apoptosis detection kit. Cytotoxicity tests revealed health risks of using Chlorophyllin and Unicert Red K 7054-J.
authors.affiliation: Department of Medical Biophysics, Institute of Molecular and Translational Medicine, Faculty of Medicine, Palacky University, Hnevotinska 3, 775 15 Olomouc, Czech Republic. katerina.tomankova@upol.cz
authors.forename: K
authors.initials: K
authors.lastname: Tomankova
authors.forename: K
authors.initials: K
authors.lastname: Kejlova
authors.forename: S
authors.initials: S
authors.lastname: Binder
authors.forename: A
authors.initials: A
authors.lastname: Daskova
authors.forename: J
authors.initials: J
authors.lastname: Zapletalova
authors.forename: H
authors.initials: H
authors.lastname: Bendova
authors.forename: H
authors.initials: H
authors.lastname: Kolarova
authors.forename: D
authors.initials: D
authors.lastname: Jirova
mesh_terms: D000818:Animals; D041702:BALB 3T3 Cells; D016923:Cell Death / Q000187:drug effects; D002470:Cell Survival; D004396:Coloring Agents / Q000633:toxicity*; D003358:Cosmetics / Q000737:chemistry / Q000633:toxicity*; D017484:Dermatitis, Phototoxic / Q000209:etiology*; D005453:Fluorescence; D005470:Fluorometry / Q000379:methods; D006801:Humans; D006861:Hydrogen Peroxide / Q000378:metabolism; D051379:Mice; D051336:Mitochondrial Membranes / Q000187:drug effects / Q000378:metabolism; D041681:NIH 3T3 Cells; D017382:Reactive Oxygen Species / Q000378:metabolism; D018675:Toxicity Tests / Q000379:methods*; D014466:Ultraviolet Rays
chemical_list: D004396:Coloring Agents; D003358:Cosmetics; D017382:Reactive Oxygen Species; D006861:Hydrogen Peroxide