1
|
Ip BC, Madnick SJ, Zheng S, van Tongeren TCA, Hall SJ, Li H, Martin S, Spriggs S, Carmichael P, Chen W, Ames D, Breitweiser LA, Pence HE, Bowling AJ, Johnson KJ, Cubberley R, Morgan JR, Boekelheide K. Development of a human liver microphysiological co-culture system for higher throughput chemical safety assessment. Toxicol Sci 2024:kfae018. [PMID: 38335931 DOI: 10.1093/toxsci/kfae018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2024] Open
Abstract
Chemicals in the systemic circulation can undergo hepatic xenobiotic metabolism, generate metabolites and exhibit altered toxicity compared to their parent compounds. This paper describes a two-chamber liver-organ co-culture model in a higher-throughput 96-well format for the determination of toxicity on target tissues in the presence of physiologically relevant human liver metabolism. This two-chamber system is a hydrogel formed within each well consisting of a central well (target tissue) and an outer ring-shaped trough (human liver tissue). The target tissue chamber can be configured to accommodate a three-dimensional (3D) spheroid-shaped microtissue, or a two-dimensional (2D) cell mono-layer. Culture medium and compounds freely diffuse between the two chambers. Human differentiated HepaRGTM liver cells are used to form the 3D human liver microtissues, which displayed robust protein expression of liver biomarkers (albumin, asialoglycoprotein receptor, Phase I cytochrome P450 (CYP3A4) enzyme, multidrug resistance-associated protein 2 transporter, and glycogen), and exhibited Phase I/II enzyme activities over the course of 17 days. Histological and ultrastructural analyses confirmed that the HepaRG microtissues presented a differentiated hepatocyte phenotype, including abundant mitochondria, endoplasmic reticulum and bile canaliculi. Liver microtissue zonation characteristics could be easily modulated by maturation in different media supplements. Furthermore, our proof-of-concept study demonstrated the efficacy of this co-culture model in evaluating testosterone-mediated androgen receptor responses in the presence of human liver metabolism. This liver-organ co-culture system provides a practical, higher-throughput testing platform for metabolism-dependent bioactivity assessment of drugs/chemicals, to better recapitulate the biological effects and potential toxicity of human exposures.
Collapse
Affiliation(s)
- Blanche C Ip
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, USA
- Center for Alternatives to Animals in Testing, Brown University, Providence, RI, USA
| | - Samantha J Madnick
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, USA
- Center for Alternatives to Animals in Testing, Brown University, Providence, RI, USA
| | - Sophia Zheng
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, USA
| | | | - Susan J Hall
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, USA
| | - Hui Li
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, USA
| | - Suzanne Martin
- Unilever Safety and Environmental Assurance Centre, Sharnbrook, United Kingdom
| | - Sandrine Spriggs
- Unilever Safety and Environmental Assurance Centre, Sharnbrook, United Kingdom
| | - Paul Carmichael
- Unilever Safety and Environmental Assurance Centre, Sharnbrook, United Kingdom
| | - Wei Chen
- Corteva, Inc, Indianapolis, IN, USA
| | | | | | | | | | | | - Richard Cubberley
- Unilever Safety and Environmental Assurance Centre, Sharnbrook, United Kingdom
| | - Jeffrey R Morgan
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, USA
- Center for Alternatives to Animals in Testing, Brown University, Providence, RI, USA
| | - Kim Boekelheide
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, USA
- Center for Alternatives to Animals in Testing, Brown University, Providence, RI, USA
| |
Collapse
|
2
|
Sparham C, Ledbetter M, Cubberley R, Gore D, Sheffield D, Teixeira A, Hodges G. Method validation and environmental monitoring of triethanolamine ester quaternary ammonium compounds. Chemosphere 2024; 346:140529. [PMID: 37914048 DOI: 10.1016/j.chemosphere.2023.140529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 10/04/2023] [Accepted: 10/22/2023] [Indexed: 11/03/2023]
Abstract
In this study water and sediment samples, collected from the River Nene (Northamptonshire) at several sites in the vicinity of the Great Billing sewage treatment plant (STP), were analysed for triethanolamine quaternary compounds (TEAQ, ester quats). A method was developed using liquid chromatography tandem mass spectrometry (LC/MS/MS) with a electrospray ionisation source (ESI). Ten components were determined using a characterised commercial sample of Tallow TEAQ as a standard. To our knowledge this is the first time environmental concentrations of a wide spectrum of individual homologues of TEAQ have been reliably quantified covering a broad range of environmental matrices (STP influent, STP effluent, surface waters and sediments), due to the challenging nature of the analytical method. The method featured novel solutions for the determination of long and multiple chain length alkyl quats, controlling loss processes, background contamination and chromatographic performance. TEAQ compounds were found to be highly removed in the sewage treatment plant resulting in low effluent concentrations. Low concentrations in both river water and sediment samples were found also. In many cases levels were below the Method Detection Limit (MDL). In river water samples, mean values of TEAQ compounds found were 210-398 ng/L for C16:0/C18:0 TEAQ diester and 126-287 ng/L for C18:0/C18:0 TEAQ diester. River sediment was found to contain mean TEAQ levels of 7.07-12.5, 19.7 to 40.3 and 7.04-35.1 μg/kg dry weight for C16:0/C16:0, C16:0/C18:0, and C18:0/C18:0 TEAQ, respectively. At Great Billing STP monoesters and diesters of TEAQ were shown to be efficiently removed (>97 and 99 %, respectively), although limited samples were taken on this occasion.
Collapse
Affiliation(s)
- Chris Sparham
- Safety & Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, United Kingdom.
| | - Moira Ledbetter
- Safety & Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, United Kingdom
| | - Richard Cubberley
- Safety & Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, United Kingdom
| | - Dave Gore
- Safety & Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, United Kingdom
| | - David Sheffield
- Safety & Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, United Kingdom
| | - Alex Teixeira
- Safety & Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, United Kingdom
| | - Geoff Hodges
- Safety & Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, United Kingdom
| |
Collapse
|
3
|
Li H, Bunglawala F, Hewitt NJ, Pendlington R, Cubberley R, Nicol B, Spriggs S, Baltazar M, Cable S, Dent M. ADME characterization and PBK model development of 3 highly protein-bound UV filters through topical application. Toxicol Sci 2023; 196:1-15. [PMID: 37584694 PMCID: PMC10613959 DOI: 10.1093/toxsci/kfad081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2023] Open
Abstract
Estimating human exposure in the safety assessment of chemicals is crucial. Physiologically based kinetic (PBK) models which combine information on exposure, physiology, and chemical properties, describing the absorption, distribution, metabolism, and excretion (ADME) processes of a chemical, can be used to calculate internal exposure metrics such as maximum concentration and area under the concentration-time curve in plasma or tissues of a test chemical in next-generation risk assessment. This article demonstrates the development of PBK models for 3 UV filters, specifically octyl methoxycinnamate, octocrylene, and 4-methylbenzylidene camphor. The models were parameterized entirely based on data obtained from in vitro and/or in silico methods in a bottom-up modeling approach and then validated based on human dermal pharmacokinetic (PK) data. The 3 UV filters are "difficult to test" in in vitro test systems due to high lipophilicity, high binding affinity for proteins, and nonspecific binding, for example, toward plastic. This research work presents critical considerations in ADME data generation, interpretation, and parameterization to assure valid PBK model development to increase confidence in using PBK modeling to help make safety decisions in the absence of human PK data. The developed PBK models of the 3 chemicals successfully simulated the plasma concentration profiles of clinical PK data following dermal application, indicating the reliability of the ADME data generated and the parameters determined. The study also provides insights and lessons learned for characterizing ADME and developing PBK models for highly lipophilic and protein-bound chemicals in the future.
Collapse
Affiliation(s)
- Hequn Li
- Unilever Safety and Environmental Assurance Centre, Sharnbrook MK44 1LQ, UK
| | - Fazila Bunglawala
- Unilever Safety and Environmental Assurance Centre, Sharnbrook MK44 1LQ, UK
| | | | - Ruth Pendlington
- Unilever Safety and Environmental Assurance Centre, Sharnbrook MK44 1LQ, UK
| | - Richard Cubberley
- Unilever Safety and Environmental Assurance Centre, Sharnbrook MK44 1LQ, UK
| | - Beate Nicol
- Unilever Safety and Environmental Assurance Centre, Sharnbrook MK44 1LQ, UK
| | - Sandrine Spriggs
- Unilever Safety and Environmental Assurance Centre, Sharnbrook MK44 1LQ, UK
| | - Maria Baltazar
- Unilever Safety and Environmental Assurance Centre, Sharnbrook MK44 1LQ, UK
| | - Sophie Cable
- Unilever Safety and Environmental Assurance Centre, Sharnbrook MK44 1LQ, UK
| | - Matthew Dent
- Unilever Safety and Environmental Assurance Centre, Sharnbrook MK44 1LQ, UK
| |
Collapse
|
4
|
Gilmour N, Reynolds J, Przybylak K, Aleksic M, Aptula N, Baltazar MT, Cubberley R, Rajagopal R, Reynolds G, Spriggs S, Thorpe C, Windebank S, Maxwell G. Next generation risk assessment for skin allergy: Decision making using new approach methodologies. Regul Toxicol Pharmacol 2022; 131:105159. [PMID: 35311660 DOI: 10.1016/j.yrtph.2022.105159] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 01/11/2022] [Accepted: 03/14/2022] [Indexed: 10/18/2022]
Abstract
Our aim is to develop and apply next generation approaches to skin allergy risk assessment (SARA) that do not require new animal test data and better quantify uncertainties. Significant progress has been made in the development of New Approach Methodologies (NAMs), non-animal test methods, for assessment of skin sensitisation and there is now focus on their application to derive potency information for use in Next Generation Risk Assessment (NGRA). The SARA model utilises a Bayesian statistical approach to infer a human-relevant metric of sensitiser potency and a measure of risk associated with a given consumer exposure based upon any combination of human repeat insult patch test, local lymph node, direct peptide reactivity assay, KeratinoSens™, h-CLAT or U-SENS™ data. Here we have applied the SARA model within our weight of evidence NGRA framework for skin allergy to three case study materials in four consumer products. Highlighting how to structure the risk assessment, apply NAMs to derive a point of departure and conclude on consumer safety risk. NGRA based upon NAMs were, for these exposures, at least as protective as the historical risk assessment approaches. Through such case studies we are building our confidence in using NAMs for skin allergy risk assessment.
Collapse
Affiliation(s)
- N Gilmour
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK.
| | - J Reynolds
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK
| | - K Przybylak
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK
| | - M Aleksic
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK
| | - N Aptula
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK
| | - M T Baltazar
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK
| | - R Cubberley
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK
| | - R Rajagopal
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK
| | - G Reynolds
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK
| | - S Spriggs
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK
| | - C Thorpe
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK
| | - S Windebank
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK
| | - G Maxwell
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK
| |
Collapse
|
5
|
Baltazar M, Cable S, Carmichael P, Cubberley R, Cull T, Dent M, Houghton J, Kukic P, Hatherell S, Middleton A, Malcomber S, Pendlington R, Reynolds G, Reynolds J, Moxon T, Nicol B, White A, Westmoreland C, Sparham C, Scott S, Rigarlsford A. An industry perspective on strategies for integrating new approach methodologies for next generation risk assessment. Toxicol Lett 2021. [DOI: 10.1016/s0378-4274(21)00359-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
6
|
Parkinson E, Aleksic M, Kukic P, Bailey A, Cubberley R, Skipp P. Proteomic analysis of the cellular response to a potent sensitiser unveils the dynamics of haptenation in living cells. Toxicology 2020; 445:152603. [DOI: 10.1016/j.tox.2020.152603] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 09/22/2020] [Accepted: 09/23/2020] [Indexed: 01/09/2023]
|
7
|
Baltazar MT, Cable S, Carmichael PL, Cubberley R, Cull T, Delagrange M, Dent MP, Hatherell S, Houghton J, Kukic P, Li H, Lee MY, Malcomber S, Middleton AM, Moxon TE, Nathanail AV, Nicol B, Pendlington R, Reynolds G, Reynolds J, White A, Westmoreland C. A Next-Generation Risk Assessment Case Study for Coumarin in Cosmetic Products. Toxicol Sci 2020; 176:236-252. [PMID: 32275751 PMCID: PMC7357171 DOI: 10.1093/toxsci/kfaa048] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Next-Generation Risk Assessment is defined as an exposure-led, hypothesis-driven risk assessment approach that integrates new approach methodologies (NAMs) to assure safety without the use of animal testing. These principles were applied to a hypothetical safety assessment of 0.1% coumarin in face cream and body lotion. For the purpose of evaluating the use of NAMs, existing animal and human data on coumarin were excluded. Internal concentrations (plasma Cmax) were estimated using a physiologically based kinetic model for dermally applied coumarin. Systemic toxicity was assessed using a battery of in vitro NAMs to identify points of departure (PoDs) for a variety of biological effects such as receptor-mediated and immunomodulatory effects (Eurofins SafetyScreen44 and BioMap Diversity 8 Panel, respectively), and general bioactivity (ToxCast data, an in vitro cell stress panel and high-throughput transcriptomics). In addition, in silico alerts for genotoxicity were followed up with the ToxTracker tool. The PoDs from the in vitro assays were plotted against the calculated in vivo exposure to calculate a margin of safety with associated uncertainty. The predicted Cmax values for face cream and body lotion were lower than all PoDs with margin of safety higher than 100. Furthermore, coumarin was not genotoxic, did not bind to any of the 44 receptors tested and did not show any immunomodulatory effects at consumer-relevant exposures. In conclusion, this case study demonstrated the value of integrating exposure science, computational modeling and in vitro bioactivity data, to reach a safety decision without animal data.
Collapse
Affiliation(s)
- Maria T Baltazar
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Sophie Cable
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Paul L Carmichael
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Richard Cubberley
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Tom Cull
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Mona Delagrange
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Matthew P Dent
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Sarah Hatherell
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Jade Houghton
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Predrag Kukic
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Hequn Li
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Mi-Young Lee
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Sophie Malcomber
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Alistair M Middleton
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Thomas E Moxon
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Alexis V Nathanail
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Beate Nicol
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Ruth Pendlington
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Georgia Reynolds
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Joe Reynolds
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Andrew White
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| | - Carl Westmoreland
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Sharnbrook, Bedfordshire MK44 1LQ, UK
| |
Collapse
|
8
|
Parkinson E, Aleksic M, Arthur R, Regufe Da Mota S, Cubberley R, Skipp PJ. Proteomic analysis of haptenation by skin sensitisers: Diphencyprone and ethyl acrylate. Toxicol In Vitro 2020; 62:104697. [DOI: 10.1016/j.tiv.2019.104697] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 10/16/2019] [Accepted: 10/21/2019] [Indexed: 02/06/2023]
|
9
|
Eilstein J, Grégoire S, Fabre A, Arbey E, Géniès C, Duplan H, Rothe H, Ellison C, Cubberley R, Schepky A, Lange D, Klaric M, Hewitt NJ, Jacques‐Jamin C. Use of human liver and EpiSkin™ S9 subcellular fractions as a screening assays to compare the in vitro hepatic and dermal metabolism of 47 cosmetics‐relevant chemicals. J Appl Toxicol 2020; 40:416-433. [DOI: 10.1002/jat.3914] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 09/24/2019] [Accepted: 09/24/2019] [Indexed: 11/09/2022]
|
10
|
Lee MY, Martin S, Pickles J, Rigarlsford A, Sorrell I, Herédi-Szabó K, Kalapos-Kovács B, Cubberley R. P161 - Quantitative metabolic profiling of slowly cleared chemicals in in vitro models including 3D liver spheroid and hepatopac and hepatic clearance predictions from in vitro data using gastroplus PBPK modelling following topical application. Drug Metab Pharmacokinet 2020. [DOI: 10.1016/j.dmpk.2020.04.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
11
|
Lee MY, Cubberley R, Gáborik Z, Molnár B, Herédi-Szabó K, Kalapos-Kovács B. P162 - Further characterization of hepatopac – non-targeted metabolite-profiling of 7 chemicals including slow clearance chemicals and metabolism-mediated toxicity. Drug Metab Pharmacokinet 2020. [DOI: 10.1016/j.dmpk.2020.04.163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
12
|
Hewitt NJ, Grégoire S, Cubberley R, Duplan H, Eilstein J, Ellison C, Lester C, Fabian E, Fernandez J, Géniès C, Jacques-Jamin C, Klaric M, Rothe H, Sorrell I, Lange D, Schepky A. Measurement of the penetration of 56 cosmetic relevant chemicals into and through human skin using a standardized protocol. J Appl Toxicol 2019; 40:403-415. [PMID: 31867769 PMCID: PMC7027575 DOI: 10.1002/jat.3913] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 09/30/2019] [Accepted: 09/30/2019] [Indexed: 11/09/2022]
Abstract
OECD test guideline 428 compliant protocol using human skin was used to test the penetration of 56 cosmetic‐relevant chemicals. The penetration of finite doses (10 μL/cm2) of chemicals was measured over 24 hours. The dermal delivery (DD) (amount in the epidermis, dermis and receptor fluid [RF]) ranged between 0.03 ± 0.02 and 72.61 ± 8.89 μg/cm2. The DD of seven chemicals was comparable with in vivo values. The DD was mainly accounted for by the amount in the RF, although there were some exceptions, particularly of low DD chemicals. While there was some variability due to cell outliers and donor variation, the overall reproducibility was very good. As six chemicals had to be applied in 100% ethanol due to low aqueous solubility, we compared the penetration of four chemicals with similar physicochemical properties applied in ethanol and phosphate‐buffered saline. Of these, the DD of hydrocortisone was the same in both solvents, while the DD of propylparaben, geraniol and benzophenone was lower in ethanol. Some chemicals displayed an infinite dose kinetic profile; whereas, the cumulative absorption of others into the RF reflected the finite dosing profile, possibly due to chemical volatility, total absorption, chemical precipitation through vehicle evaporation or protein binding (or a combination of these). These investigations provide a substantial and consistent set of skin penetration data that can help improve the understanding of skin penetration, as well as improve the prediction capacity of in silico skin penetration models. The penetration of 56 chemicals was tested in human skin using a standard protocol. Dermal delivery correlated with the amount in the receptor fluid (RF). The impact of solvent on penetration was evaluated. Despite finite doses being applied, different profiles of cumulative absorption kinetics into the RF were observed. These data may help understand skin penetration and improve the prediction capacity of in silico skin penetration models.
Collapse
Affiliation(s)
| | | | | | | | - Joan Eilstein
- L'Oreal Research and Innovation, Aulnay-Sous-Bois, France
| | | | - Cathy Lester
- The Procter and Gamble Company, Cincinnati, Ohio
| | | | | | | | | | | | - Helga Rothe
- Procter and Gamble (currently Coty), Darmstadt, Germany
| | | | | | | |
Collapse
|
13
|
Géniès C, Jacques-Jamin C, Duplan H, Rothe H, Ellison C, Cubberley R, Schepky A, Lange D, Klaric M, Hewitt NJ, Grégoire S, Arbey E, Fabre A, Eilstein J. Comparison of the metabolism of 10 cosmetics-relevant chemicals in EpiSkin™ S9 subcellular fractions and in vitro human skin explants. J Appl Toxicol 2019; 40:313-326. [PMID: 31701564 DOI: 10.1002/jat.3905] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 08/13/2019] [Accepted: 08/27/2019] [Indexed: 11/08/2022]
Abstract
An understanding of the bioavailability of topically applied cosmetics ingredients is key to predicting their local skin and systemic toxicity and making a safety assessment. We investigated whether short-term incubations with S9 from the reconstructed epidermal skin model, EpiSkin™, would give an indication of the rate of chemical metabolism and produce similar metabolites to those formed in incubations with human skin explants. Both have advantages: EpiSkin™ S9 is a higher-throughput assay, while the human skin explant model represents a longer incubation duration (24 hours) model integrating cutaneous distribution with metabolite formation. Here, we compared the metabolism of 10 chemicals (caffeine, vanillin, cinnamyl alcohol, propylparaben, 4-amino-3-nitrophenol, resorcinol, 4-chloroaniline, 2-amino-3-methyl-3H-imidazo[4,5-F]quinoline and 2-acetyl aminofluorene) in both models. Both models were shown to have functional Phase 1 and 2 enzymes, including cytochrome P450 activities. There was a good concordance between the models with respect to the level of metabolism (stable vs. slowly vs. extensively metabolized chemicals) and major early metabolites produced for eight chemicals. Discordant results for two chemicals were attributed to a lack of the appropriate cofactor (NADP+ ) in S9 incubations (cinnamyl alcohol) and protein binding influencing chemical uptake in skin explants (4-chloroaniline). These data support the use of EpiSkin™ S9 as a screening assay to provide an initial indication of the metabolic stability of a chemical applied topically. If required, chemicals that are not metabolized by EpiSkin™ S9 can be tested in longer-term incubations with in vitro human explant skin to determine whether it is slowly metabolized or not metabolized at all.
Collapse
|
14
|
Grégoire S, Cubberley R, Duplan H, Eilstein J, Hewitt NJ, Jacques-Jamin C, Genies C, Klaric M, Rothe H, Ellison C, Fernandez J, Schepky A. Use of a Simple in vitro Test to Assess Loss of Chemical due to Volatility during an in vitro Human Skin Absorption Study. Skin Pharmacol Physiol 2019; 32:117-124. [PMID: 30889606 DOI: 10.1159/000497105] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 01/18/2019] [Indexed: 11/19/2022]
Abstract
BACKGROUND We tested the cutaneous distribution of 50 chemicals in frozen human skin. The mass balance (MB) values for 48% of the chemicals were < 90%, possibly due to evaporation. METHODS We confirmed the reduction in MB was due to evaporation for two chemicals tested in skin penetration experiments using a carbon filter above the skin to trap airborne chemical. An in vitro assay was used to predict the reduction in MB due to evaporation by comparing the recovery of chemicals after 4 h of incubation at room temperature in open and closed vials. RESULTS Evaporative losses in vitro correlated well with measured MBs (i.e., < 90%) in skin penetration experiments (R2 = 0.81). There was a correlation of the MB with the vapour pressure (VP) which could be used to group chemicals according to their likelihood to evaporate during the course of a skin penetration study. There was also a correlation of MB with Henry's law constants, melting and boiling points. CONCLUSION Our data support the use of a quick and simple test for volatility to account for the loss of MB in skin penetration experiment due to volatility. The best parameter to indicate the potential of a chemical to evaporate is the VP.
Collapse
Affiliation(s)
| | | | | | - Joan Eilstein
- L'Oreal Research and Innovation, Aulnay-sous-Bois, France
| | | | | | | | | | - Helga Rothe
- Procter & Gamble (currently Coty), Darmstadt, Germany
| | | | | | | |
Collapse
|
15
|
Géniès C, Jamin EL, Debrauwer L, Zalko D, Person EN, Eilstein J, Grégoire S, Schepky A, Lange D, Ellison C, Roe A, Salhi S, Cubberley R, Hewitt NJ, Rothe H, Klaric M, Duplan H, Jacques-Jamin C. Comparison of the metabolism of 10 chemicals in human and pig skin explants. J Appl Toxicol 2018; 39:385-397. [PMID: 30345528 PMCID: PMC6587507 DOI: 10.1002/jat.3730] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 08/13/2018] [Accepted: 08/22/2018] [Indexed: 01/24/2023]
Abstract
Skin metabolism is important to consider when assessing local toxicity and/or penetration of chemicals and their metabolites. If human skin supply is limited, pig skin can be used as an alternative. To identify any species differences, we have investigated the metabolism of 10 chemicals in a pig and human skin explant model. Phase I metabolic pathways in skin from both species included those known to occur via cytochrome P450s, esterases, alcohol dehydrogenases and aldehyde dehydrogenases. Common Phase II pathways were glucuronidation and sulfation but other conjugation pathways were also identified. Chemicals not metabolized by pig skin (caffeine, IQ and 4‐chloroaniline) were also not metabolized by human skin. Six chemicals metabolized by pig skin were metabolized to a similar extent (percentage parent remaining) by human skin. Human skin metabolites were also detected in pig skin incubations, except for one unidentified minor vanillin metabolite. Three cinnamyl alcohol metabolites were unique to pig skin but represented minor metabolites. There were notable species differences in the relative amounts of common metabolites. The difference in the abundance of the sulfate conjugates of resorcinol and 4‐amino‐3‐nitrophenol was in accordance with the known lack of aryl sulfotransferase activity in pigs. In conclusion, while qualitative comparisons of metabolic profiles were consistent between pig and human skin, there were some quantitative differences in the percentage of metabolites formed. This preliminary assessment suggests that pig skin is metabolically competent and could be a useful tool for evaluating potential first‐pass metabolism before testing in human‐derived tissues. We have investigated the metabolism of 10 chemicals in viable pig and human skin. Phase I and II metabolic pathways were present in skin from both species. Chemicals not metabolized by pig skin were also not metabolized by human skin. Six chemicals metabolized by pig skin were also metabolized to a similar extent by human skin. Pig and human skin produced common metabolites, although some species differences were observed and as their relative amounts differed.
Collapse
Affiliation(s)
- C Géniès
- Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - E L Jamin
- Toxalim (Research Centre in Food Toxicology), Université de Toulouse, INRA, ENVT, INP-Purpan, UPS, Toulouse, France
| | - L Debrauwer
- Toxalim (Research Centre in Food Toxicology), Université de Toulouse, INRA, ENVT, INP-Purpan, UPS, Toulouse, France
| | - D Zalko
- Toxalim (Research Centre in Food Toxicology), Université de Toulouse, INRA, ENVT, INP-Purpan, UPS, Toulouse, France
| | - E N Person
- Toxalim (Research Centre in Food Toxicology), Université de Toulouse, INRA, ENVT, INP-Purpan, UPS, Toulouse, France
| | | | | | | | - D Lange
- Beiersdorf AG, Hamburg, Germany
| | - C Ellison
- The Procter & Gamble Company, Cincinnati, OH, USA
| | - A Roe
- The Procter & Gamble Company, Cincinnati, OH, USA
| | | | | | | | | | - M Klaric
- Cosmetics Europe, Brussels, Belgium
| | - H Duplan
- Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | | |
Collapse
|
16
|
Nepelska M, Cronin M, Cubberley R, Dent M, Firman J, Fisher J, Kenna G, Mahony C, Nicol B, Piechota S, Przybylak K, Schepky A, Tozer S, Troutman J, Desprez B. Cosmetic Europe's long range science strategy – A non-animal safety assessment case study for phenoxyethanol, a cosmetic ingredient. Toxicol Lett 2018. [DOI: 10.1016/j.toxlet.2018.06.806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
17
|
Desprez B, Dent M, Keller D, Klaric M, Ouédraogo G, Cubberley R, Duplan H, Eilstein J, Ellison C, Grégoire S, Hewitt NJ, Jacques-Jamin C, Lange D, Roe A, Rothe H, Blaauboer BJ, Schepky A, Mahony C. A strategy for systemic toxicity assessment based on non-animal approaches: The Cosmetics Europe Long Range Science Strategy programme. Toxicol In Vitro 2018; 50:137-146. [DOI: 10.1016/j.tiv.2018.02.017] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 02/26/2018] [Accepted: 02/27/2018] [Indexed: 12/26/2022]
|
18
|
Parkinson E, Aleksic M, Cubberley R, Kaur-Atwal G, Vissers JPC, Skipp P. Determination of Protein Haptenation by Chemical Sensitizers Within the Complexity of the Human Skin Proteome. Toxicol Sci 2018; 162:429-438. [PMID: 29267982 PMCID: PMC5889026 DOI: 10.1093/toxsci/kfx265] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Skin sensitization associated with the development of allergic contact dermatitis occurs via a number of specific key events at the cellular level. The molecular initiating event (MIE), the first in the sequence of these events, occurs after exposure of the skin to an electrophilic chemical, causing the irreversible haptenation of proteins within skin. Characterization of this MIE is a key step in elucidating the skin sensitization adverse outcome pathway and is essential to providing parameters for mathematical models to predict the capacity of a chemical to cause sensitization. As a first step to addressing this challenge, we have exposed complex protein lysates from a keratinocyte cell line and human skin tissue with a range of well characterized sensitizers, including dinitrochlorobenzene, 5-chloro-2-methylisothiazol-3-one, cinnamaldehyde, and the non (or weak) sensitizer 6-methyl coumarin. Using a novel stable isotope labeling approach combined with ion mobility-assisted data independent mass spectrometry (HDMSE), we have characterized the haptenome for these sensitizers. Although a significant proportion of highly abundant proteins were haptenated, we also observed the haptenation of low abundant proteins by all 3 of the chemical sensitizers tested, indicating that within a complex protein background, protein abundance is not the sole determinant driving haptenation, highlighting a relationship to tertiary protein structure and the amino acid specificity of these chemical sensitizers and sensitizer potency.
Collapse
Affiliation(s)
- Erika Parkinson
- Centre for Biological Sciences
- Centre for Proteomic Research, Institute for Life Sciences, University of Southampton, Southampton SO17 1BJ, UK
| | - Maja Aleksic
- Safety & Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook MK44 1LQ, UK
| | - Richard Cubberley
- Safety & Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook MK44 1LQ, UK
| | | | | | - Paul Skipp
- Centre for Biological Sciences
- Centre for Proteomic Research, Institute for Life Sciences, University of Southampton, Southampton SO17 1BJ, UK
| |
Collapse
|
19
|
Rothe H, Grégoire S, Obringer C, Manwaring J, Eilstein J, Lange D, Cubberley R, Duplan H, Jacques-Jamin C, Ellison C, Klaric M, Hewitt N, Schepky A. Skin penetration in silico modeling-improvement by using in vitro data. Toxicol Lett 2017. [DOI: 10.1016/j.toxlet.2017.07.111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
20
|
Schepky A, Cubberley R, Duplan H, Eilstein J, Ellison C, Gregoire S, Hewitt N, Jacques-Jamin C, Lange D, Roe A, Rothe H, Klaric M. Better understanding of bioavailability of cosmetic ingredients: Results from Cosmetics Europe Skin Bioavailability project. Toxicol Lett 2017. [DOI: 10.1016/j.toxlet.2017.07.305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
21
|
Jacques-Jamin C, Duplan H, Rothe H, Vaillant O, Eilstein J, Grégoire S, Cubberley R, Lange D, Ellison C, Klaric M, Hewitt N, Schepky A. Comparison of the Skin Penetration of 3 Metabolically Stable Chemicals Using Fresh and Frozen Human Skin. Skin Pharmacol Physiol 2017; 30:234-245. [DOI: 10.1159/000475472] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 04/03/2017] [Indexed: 11/19/2022]
|
22
|
Grégoire S, Cubberley R, Duplan H, Eilstein J, Lange D, Hewitt N, Jacques-Jamin C, Klaric M, Rothe H, Ellison C, Vaillant O, Schepky A. Solvent Solubility Testing of Cosmetics-Relevant Chemicals: Methodology and Correlation of Water Solubility to In Silico Predictions. J SOLUTION CHEM 2017. [DOI: 10.1007/s10953-017-0652-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
23
|
Rothe H, Obringer C, Manwaring J, Avci C, Wargniez W, Eilstein J, Hewitt N, Cubberley R, Duplan H, Lange D, Jacques‐Jamin C, Klaric M, Schepky A, Grégoire S. Comparison of protocols measuring diffusion and partition coefficients in the stratum corneum. J Appl Toxicol 2017; 37:806-816. [PMID: 28139006 PMCID: PMC5484360 DOI: 10.1002/jat.3427] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 11/08/2016] [Accepted: 11/08/2016] [Indexed: 11/08/2022]
Abstract
Partition (K) and diffusion (D) coefficients are important to measure for the modelling of skin penetration of chemicals through the stratum corneum (SC). We compared the feasibility of three protocols for the testing of 50 chemicals in our main studies, using three cosmetics-relevant model chemicals with a wide range of logP values. Protocol 1: SC concentration-depth profile using tape-stripping (measures KSC/v and DSC /HSC2 , where HSC is the SC thickness); Protocol 2A: incubation of isolated SC with chemical (direct measurement of KSC/v only) and Protocol 2B: diffusion through isolated SC mounted on a Franz cell (measures KSC/v and DSC /HSC2 , and is based on Fick's laws). KSC/v values for caffeine and resorcinol using Protocol 1 and 2B were within 30% of each other, values using Protocol 2A were ~two-fold higher, and all values were within 10-fold of each other. Only indirect determination of KSC/v by Protocol 2B was different from the direct measurement of KSC/v by Protocol 2A and Protocol 1 for 7-EC. The variability of KSC/v for all three chemicals using Protocol 2B was higher compared to Protocol 1 and 2A. DSC /HSC2 values for the three chemicals were of the same order of magnitude using all three protocols. Additionally, using Protocol 1, there was very little difference between parameters measured in pig and human SC. In conclusion, KSC/v, and DSC values were comparable using different methods. Pig skin might be a good surrogate for human skin for the three chemicals tested. Copyright © 2017 The Authors Journal of Applied Toxicology published by John Wiley & Sons Ltd.
Collapse
Affiliation(s)
- H. Rothe
- Procter & Gamble Service GmbH, (currently HFC Prestige Service Germany GmbH)Berliner Allee 6564295DarmstadtGermany
- Present address: Coty, Berliner Allee6564295DarmstadtGermany
| | - C. Obringer
- Procter & Gamble Inc., Mason Business CenterMasonOH45040USA
| | - J. Manwaring
- Procter & Gamble Inc., Mason Business CenterMasonOH45040USA
| | - C. Avci
- L'Oreal Research & Innovation1, avenue Eugène Schueller93601Aulnay‐sous‐BoisFrance
| | - W. Wargniez
- L'Oreal Research & Innovation1, avenue Eugène Schueller93601Aulnay‐sous‐BoisFrance
| | - J. Eilstein
- L'Oreal Research & Innovation1, avenue Eugène Schueller93601Aulnay‐sous‐BoisFrance
| | - N. Hewitt
- Cosmetics EuropeAvenue Herrmann‐Debroux 40B‐1160BrusselsBelgium
| | - R. Cubberley
- Unilever, Colworth Science ParkSharnbrookBedfordMK44 1LQUK
| | - H. Duplan
- Pierre Fabre Dermo‐Cosmétique3, avenue Hubert Curien31035Toulouse Cedex 1France
| | - D. Lange
- Beiersdorf AGUnnastrasse 48D‐20245HamburgGermany
| | - C. Jacques‐Jamin
- Pierre Fabre Dermo‐Cosmétique3, avenue Hubert Curien31035Toulouse Cedex 1France
| | - M. Klaric
- Cosmetics EuropeAvenue Herrmann‐Debroux 40B‐1160BrusselsBelgium
| | - A. Schepky
- Beiersdorf AGUnnastrasse 48D‐20245HamburgGermany
| | - S. Grégoire
- L'Oreal Research & Innovation1, avenue Eugène Schueller93601Aulnay‐sous‐BoisFrance
| |
Collapse
|
24
|
Rothe H, Cubberley R, Duplan H, Einstein J, Gregoire S, Jamin CJ, Klaric M, Hewitt N, Schepky A. Cosmetics Europe skin bioavailability and metabolism project. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.06.1313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
25
|
Gerstel D, Jacques-Jamin C, Schepky A, Cubberley R, Eilstein J, Grégoire S, Hewitt N, Klaric M, Rothe H, Duplan H. Comparison of protocols for measuring cosmetic ingredient distribution in human and pig skin. Toxicol In Vitro 2016; 34:153-160. [DOI: 10.1016/j.tiv.2016.03.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 03/08/2016] [Accepted: 03/23/2016] [Indexed: 11/28/2022]
|
26
|
Rothe H, Schepky A, Hewitt N, Cubberley R, Duplan H, Eilstein J, Gerstel D, Grégoire S, Jacques-Jamin C, Klaric M. Solubility of cosmetics ingredients in 6 different solvents and applicability to skin bioavailability assays. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
27
|
Sanderson PN, Simpson W, Cubberley R, Aleksic M, Gutsell S, Russell PJ. Mechanistic understanding of molecular initiating events (MIEs) using NMR spectroscopy. Toxicol Res (Camb) 2015; 5:34-44. [PMID: 30090324 DOI: 10.1039/c5tx00246j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 09/11/2015] [Indexed: 11/21/2022] Open
Abstract
Toxicological risk assessments in the 21st century are increasingly being driven by the Adverse Outcome Pathways (AOP) conceptual framework in which the Molecular Initiating Event (MIE) is of fundamental importance to pathway progression. For those MIEs that involve covalent chemical reactions, such as protein haptenation, determination of relative rates and mechanisms of reactions is a prerequisite for their understanding. The utility of NMR spectroscopy as an experimental technique for effectively providing reaction rate and mechanistic information for early assessment of likely MIE(s) has been demonstrated. To demonstrate the concept, model systems exemplifying common chemical reactions involved in the covalent modification of proteins were utilized; these involved chemical reactions of electrophilic species (representing different mechanistic classes) with simple amine and thiol nucleophiles acting as surrogates for the reactive groups of lysine and cysteine protein side chains respectively. Such molecular interactions are recognized as critical mechanisms in a variety of chemical and drug toxicities, including respiratory and skin sensitization and liver toxicity as well as being the key mechanism of action for a number of therapeutic agents.
Collapse
Affiliation(s)
- Paul N Sanderson
- Unilever Safety & Environmental Assurance Centre , Colworth Science Park , Sharnbrook , Bedford , MK44 1LQ , UK .
| | - Wendy Simpson
- Unilever Safety & Environmental Assurance Centre , Colworth Science Park , Sharnbrook , Bedford , MK44 1LQ , UK .
| | - Richard Cubberley
- Unilever Safety & Environmental Assurance Centre , Colworth Science Park , Sharnbrook , Bedford , MK44 1LQ , UK .
| | - Maja Aleksic
- Unilever Safety & Environmental Assurance Centre , Colworth Science Park , Sharnbrook , Bedford , MK44 1LQ , UK .
| | - Stephen Gutsell
- Unilever Safety & Environmental Assurance Centre , Colworth Science Park , Sharnbrook , Bedford , MK44 1LQ , UK .
| | - Paul J Russell
- Unilever Safety & Environmental Assurance Centre , Colworth Science Park , Sharnbrook , Bedford , MK44 1LQ , UK .
| |
Collapse
|
28
|
Parkinson E, Boyd P, Aleksic M, Cubberley R, O'Connor D, Skipp P. Stable isotope labeling method for the investigation of protein haptenation by electrophilic skin sensitizers. Toxicol Sci 2014; 142:239-49. [PMID: 25145658 DOI: 10.1093/toxsci/kfu168] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The risk of contact sensitization is a major consideration in the development of new formulations for personal care products. However, developing a mechanistic approach for non-animal risk assessment requires further understanding of haptenation of skin proteins by sensitizing chemicals, which is the molecular initiating event causative of skin sensitization. The non-stoichiometric nature of protein haptenation results in relatively low levels of modification, often of low abundant proteins, presenting a major challenge for their assignment in complex biological matrices such as skin. Instrumental advances over the last few years have led to a considerable increase in sensitivity of mass spectrometry (MS) techniques. We have combined these advancements with a novel dual-labeling/LC-MS(E) approach to provide an in-depth direct comparison of human serum albumin (HSA), 2,4-dinitro-1-chlorobenzene (DNCB), 5-chloro-2-methyl-4-isothiazolin-3-one (MCI), trans-cinnamaldehyde, and 6-methyl coumarin. These data have revealed novel insights into the differences in protein haptenation between sensitizers with different reaction mechanisms and sensitizing potency; the extreme sensitizers DNCB and MCI were shown to modify a greater number of nucleophilic sites than the moderate sensitizer cinnamaldehyde; and the weak/non-sensitizer 6-methyl coumarin was restricted to only a single nucleophilic residue within HSA. The evaluation of this dual labeling/LC-MS(E) approach using HSA as a model protein has also demonstrated that this strategy could be applied to studying global haptenation in complex mixtures of skin-related proteins by different chemicals.
Collapse
Affiliation(s)
- Erika Parkinson
- Centre for Biological Sciences, University of Southampton, Southampton, SO17 1BJ, UK Centre for Proteomic Research, Institute for Life Sciences, University of Southampton, Southampton, SO17 1BJ, UK
| | - Pete Boyd
- Centre for Biological Sciences, University of Southampton, Southampton, SO17 1BJ, UK Centre for Proteomic Research, Institute for Life Sciences, University of Southampton, Southampton, SO17 1BJ, UK
| | - Maja Aleksic
- Safety and Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook, MK44 1LQ, UK
| | - Richard Cubberley
- Safety and Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook, MK44 1LQ, UK
| | - David O'Connor
- Department of Biological Sciences, Xi'an Jiaotong-Liverpool University, SIP Suzhou, Jiangsu Province 215123, China
| | - Paul Skipp
- Centre for Biological Sciences, University of Southampton, Southampton, SO17 1BJ, UK Centre for Proteomic Research, Institute for Life Sciences, University of Southampton, Southampton, SO17 1BJ, UK
| |
Collapse
|
29
|
Maxwell G, MacKay C, Cubberley R, Davies M, Gellatly N, Glavin S, Gouin T, Jacquoilleot S, Moore C, Pendlington R, Saib O, Sheffield D, Stark R, Summerfield V. Applying the skin sensitisation adverse outcome pathway (AOP) to quantitative risk assessment. Toxicol In Vitro 2013; 28:8-12. [PMID: 24184331 DOI: 10.1016/j.tiv.2013.10.013] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Revised: 10/22/2013] [Accepted: 10/23/2013] [Indexed: 12/14/2022]
Abstract
As documented in the recent OECD report 'the adverse outcome pathway for skin sensitisation initiated by covalent binding to proteins' (OECD, 2012), the chemical and biological events driving the induction of human skin sensitisation have been investigated for many years and are now well understood. Several non-animal test methods have been developed to predict sensitiser potential by measuring the impact of chemical sensitisers on these key events (Adler et al., 2011; Maxwell et al., 2011); however our ability to use these non-animal datasets for risk assessment decision-making (i.e. to establish a safe level of human exposure for a sensitising chemical) remains limited and a more mechanistic approach to data integration is required to address this challenge. Informed by our previous efforts to model the induction of skin sensitisation (Maxwell and MacKay, 2008) we are now developing two mathematical models ('total haptenated protein' model and 'CD8(+) T cell response' model) that will be linked to provide predictions of the human CD8(+) T cell response for a defined skin exposure to a sensitising chemical. Mathematical model development is underpinned by focussed clinical or human-relevant research activities designed to inform/challenge model predictions whilst also increasing our fundamental understanding of human skin sensitisation. With this approach, we aim to quantify the relationship between the dose of sensitiser applied to the skin and the extent of the hapten-specific T cell response that would result. Furthermore, by benchmarking our mathematical model predictions against clinical datasets (e.g. human diagnostic patch test data), instead of animal test data, we propose that this approach could represent a new paradigm for mechanistic toxicology.
Collapse
Affiliation(s)
- Gavin Maxwell
- Safety & Environmental Assurance Centre (SEAC) Colworth, Unilever, Colworth Science Park, Sharnbrook, Bedford MK44 1LQ, UK.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Koster S, Boobis AR, Cubberley R, Hollnagel HM, Richling E, Wildemann T, Würtzen G, Galli CL. Application of the TTC concept to unknown substances found in analysis of foods. Food Chem Toxicol 2011; 49:1643-60. [DOI: 10.1016/j.fct.2011.03.049] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2011] [Revised: 03/21/2011] [Accepted: 03/25/2011] [Indexed: 11/29/2022]
|
31
|
Koster S, Boobis A, Carlander D, Cubberley R, Hollnagel H, Richling E, Würtzen G, Galli C. The application of the TTC concept to unknown substances found in the analysis of foods. Toxicol Lett 2011. [DOI: 10.1016/j.toxlet.2011.05.111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
32
|
Wright C, Davenport EJ, Kan-King-Yu D, Jefferies D, Cubberley R, Lalljie SPD. Inter-laboratory comparison of polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) in bleaching earth used in the refinement of edible oils. Food Addit Contam 2005; 22:716-25. [PMID: 16147427 DOI: 10.1080/02652030500157643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Bleaching earth (dried, powdered, bentonite-montmorillonite clay) is commonly used as a processing aid in edible oil refinement. Used bleaching earth may be incorporated into animal feed indirectly, for example because it is included into seed meal, or directly (e.g., as a binding agent). Control must be demonstrated to ensure that the levels of polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) in feed ingredients do not infringe European Community regulations. The low legislative action level assigned is analytically challenging and may be at or below the limits of quantification achievable by many laboratories. A statistical comparison (following the IUPAC/ISO/AOAC protocol) was made of analyses of PCDDs and PCDFs in selected bleaching earth samples by laboratories from Europe and the USA to assess the comparability of data. Of 19 sets of results submitted by laboratories for replicate samples, 11 demonstrated acceptable agreement.
Collapse
Affiliation(s)
- C Wright
- Safety and Environmental Assurance Centre, Unilever Colworth, Sharnbrook, UK.
| | | | | | | | | | | |
Collapse
|