1
|
Serafini MM, Sepehri S, Midali M, Stinckens M, Biesiekierska M, Wolniakowska A, Gatzios A, Rundén-Pran E, Reszka E, Marinovich M, Vanhaecke T, Roszak J, Viviani B, SenGupta T. Recent advances and current challenges of new approach methodologies in developmental and adult neurotoxicity testing. Arch Toxicol 2024; 98:1271-1295. [PMID: 38480536 DOI: 10.1007/s00204-024-03703-8] [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] [Received: 11/29/2023] [Accepted: 02/06/2024] [Indexed: 03/27/2024]
Abstract
Adult neurotoxicity (ANT) and developmental neurotoxicity (DNT) assessments aim to understand the adverse effects and underlying mechanisms of toxicants on the human nervous system. In recent years, there has been an increasing focus on the so-called new approach methodologies (NAMs). The Organization for Economic Co-operation and Development (OECD), together with European and American regulatory agencies, promote the use of validated alternative test systems, but to date, guidelines for regulatory DNT and ANT assessment rely primarily on classical animal testing. Alternative methods include both non-animal approaches and test systems on non-vertebrates (e.g., nematodes) or non-mammals (e.g., fish). Therefore, this review summarizes the recent advances of NAMs focusing on ANT and DNT and highlights the potential and current critical issues for the full implementation of these methods in the future. The status of the DNT in vitro battery (DNT IVB) is also reviewed as a first step of NAMs for the assessment of neurotoxicity in the regulatory context. Critical issues such as (i) the need for test batteries and method integration (from in silico and in vitro to in vivo alternatives, e.g., zebrafish, C. elegans) requiring interdisciplinarity to manage complexity, (ii) interlaboratory transferability, and (iii) the urgent need for method validation are discussed.
Collapse
Affiliation(s)
- Melania Maria Serafini
- Department of Pharmacological and Biomolecular Sciences, "Rodolfo Paoletti", Università degli Studi di Milano, Milan, Italy.
| | - Sara Sepehri
- Department of In Vitro Toxicology and Dermato-Cosmetology (IVTD), Vrije Universiteit Brussels, Brussels, Belgium
| | - Miriam Midali
- Department of Pharmacological and Biomolecular Sciences, "Rodolfo Paoletti", Università degli Studi di Milano, Milan, Italy
| | - Marth Stinckens
- Department of In Vitro Toxicology and Dermato-Cosmetology (IVTD), Vrije Universiteit Brussels, Brussels, Belgium
| | - Marta Biesiekierska
- Department of Translational Research, Nofer Institute of Occupational Medicine, Lodz, Poland
| | - Anna Wolniakowska
- Department of Translational Research, Nofer Institute of Occupational Medicine, Lodz, Poland
| | - Alexandra Gatzios
- Department of In Vitro Toxicology and Dermato-Cosmetology (IVTD), Vrije Universiteit Brussels, Brussels, Belgium
| | - Elise Rundén-Pran
- The Climate and Environmental Research Institute NILU, Kjeller, Norway
| | - Edyta Reszka
- Department of Translational Research, Nofer Institute of Occupational Medicine, Lodz, Poland
| | - Marina Marinovich
- Department of Pharmacological and Biomolecular Sciences, "Rodolfo Paoletti", Università degli Studi di Milano, Milan, Italy
- Center of Research on New Approach Methodologies (NAMs) in chemical risk assessment (SAFE-MI), Università degli Studi di Milano, Milan, Italy
| | - Tamara Vanhaecke
- Department of In Vitro Toxicology and Dermato-Cosmetology (IVTD), Vrije Universiteit Brussels, Brussels, Belgium
| | - Joanna Roszak
- Department of Translational Research, Nofer Institute of Occupational Medicine, Lodz, Poland
| | - Barbara Viviani
- Department of Pharmacological and Biomolecular Sciences, "Rodolfo Paoletti", Università degli Studi di Milano, Milan, Italy
- Center of Research on New Approach Methodologies (NAMs) in chemical risk assessment (SAFE-MI), Università degli Studi di Milano, Milan, Italy
| | - Tanima SenGupta
- The Climate and Environmental Research Institute NILU, Kjeller, Norway
| |
Collapse
|
2
|
Rattner BA, Bean TG, Beasley VR, Berny P, Eisenreich KM, Elliott JE, Eng ML, Fuchsman PC, King MD, Mateo R, Meyer CB, O'Brien JM, Salice CJ. Wildlife ecological risk assessment in the 21st century: Promising technologies to assess toxicological effects. Integr Environ Assess Manag 2024; 20:725-748. [PMID: 37417421 DOI: 10.1002/ieam.4806] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 06/24/2023] [Accepted: 06/27/2023] [Indexed: 07/08/2023]
Abstract
Despite advances in toxicity testing and the development of new approach methodologies (NAMs) for hazard assessment, the ecological risk assessment (ERA) framework for terrestrial wildlife (i.e., air-breathing amphibians, reptiles, birds, and mammals) has remained unchanged for decades. While survival, growth, and reproductive endpoints derived from whole-animal toxicity tests are central to hazard assessment, nonstandard measures of biological effects at multiple levels of biological organization (e.g., molecular, cellular, tissue, organ, organism, population, community, ecosystem) have the potential to enhance the relevance of prospective and retrospective wildlife ERAs. Other factors (e.g., indirect effects of contaminants on food supplies and infectious disease processes) are influenced by toxicants at individual, population, and community levels, and need to be factored into chemically based risk assessments to enhance the "eco" component of ERAs. Regulatory and logistical challenges often relegate such nonstandard endpoints and indirect effects to postregistration evaluations of pesticides and industrial chemicals and contaminated site evaluations. While NAMs are being developed, to date, their applications in ERAs focused on wildlife have been limited. No single magic tool or model will address all uncertainties in hazard assessment. Modernizing wildlife ERAs will likely entail combinations of laboratory- and field-derived data at multiple levels of biological organization, knowledge collection solutions (e.g., systematic review, adverse outcome pathway frameworks), and inferential methods that facilitate integrations and risk estimations focused on species, populations, interspecific extrapolations, and ecosystem services modeling, with less dependence on whole-animal data and simple hazard ratios. Integr Environ Assess Manag 2024;20:725-748. © 2023 His Majesty the King in Right of Canada and The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals LLC on behalf of Society of Environmental Toxicology & Chemistry (SETAC). Reproduced with the permission of the Minister of Environment and Climate Change Canada. This article has been contributed to by US Government employees and their work is in the public domain in the USA.
Collapse
Affiliation(s)
- Barnett A Rattner
- US Geological Survey, Eastern Ecological Science Center, Laurel, Maryland, USA
| | | | - Val R Beasley
- College of Veterinary Medicine, University of Illinois at Urbana, Champaign, Illinois, USA
| | | | - Karen M Eisenreich
- US Environmental Protection Agency, Washington, District of Columbia, USA
| | - John E Elliott
- Environment and Climate Change Canada, Delta, British Columbia, Canada
| | - Margaret L Eng
- Environment and Climate Change Canada, Dartmouth, Nova Scotia, Canada
| | | | - Mason D King
- Simon Fraser University, Burnaby, British Columbia, Canada
| | | | | | - Jason M O'Brien
- Environment and Climate Change Canada, Ottawa, Ontario, Canada
| | | |
Collapse
|
3
|
Bean TG, Beasley VR, Berny P, Eisenreich KM, Elliott JE, Eng ML, Fuchsman PC, Johnson MS, King MD, Mateo R, Meyer CB, Salice CJ, Rattner BA. Toxicological effects assessment for wildlife in the 21st century: Review of current methods and recommendations for a path forward. Integr Environ Assess Manag 2024; 20:699-724. [PMID: 37259706 DOI: 10.1002/ieam.4795] [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: 01/03/2023] [Revised: 04/26/2023] [Accepted: 05/30/2023] [Indexed: 06/02/2023]
Abstract
Model species (e.g., granivorous gamebirds, waterfowl, passerines, domesticated rodents) have been used for decades in guideline laboratory tests to generate survival, growth, and reproductive data for prospective ecological risk assessments (ERAs) for birds and mammals, while officially adopted risk assessment schemes for amphibians and reptiles do not exist. There are recognized shortcomings of current in vivo methods as well as uncertainty around the extent to which species with different life histories (e.g., terrestrial amphibians, reptiles, bats) than these commonly used models are protected by existing ERA frameworks. Approaches other than validating additional animal models for testing are being developed, but the incorporation of such new approach methodologies (NAMs) into risk assessment frameworks will require robust validations against in vivo responses. This takes time, and the ability to extrapolate findings from nonanimal studies to organism- and population-level effects in terrestrial wildlife remains weak. Failure to adequately anticipate and predict hazards could have economic and potentially even legal consequences for regulators and product registrants. In order to be able to use fewer animals or replace them altogether in the long term, vertebrate use and whole organism data will be needed to provide data for NAM validation in the short term. Therefore, it is worth investing resources for potential updates to existing standard test guidelines used in the laboratory as well as addressing the need for clear guidance on the conduct of field studies. Herein, we review the potential for improving standard in vivo test methods and for advancing the use of field studies in wildlife risk assessment, as these tools will be needed in the foreseeable future. Integr Environ Assess Manag 2024;20:699-724. © 2023 His Majesty the King in Right of Canada and The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals LLC on behalf of Society of Environmental Toxicology & Chemistry (SETAC). Reproduced with the permission of the Minister of Environment and Climate Change Canada. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.
Collapse
Affiliation(s)
| | - Val R Beasley
- College of Veterinary Medicine, University of Illinois at Urbana, Champaign, Illinois, USA
| | | | - Karen M Eisenreich
- US Environmental Protection Agency, Washington, District of Columbia, USA
| | - John E Elliott
- Environment and Climate Change Canada, Delta, British Columbia, Canada
| | - Margaret L Eng
- Environment and Climate Change Canada, Dartmouth, Nova Scotia, Canada
| | | | - Mark S Johnson
- US Defense Centers for Public Health-Aberdeen, Aberdeen Proving Ground, Maryland, USA
| | - Mason D King
- Simon Fraser University, Burnaby, British Columbia, Canada
| | - Rafael Mateo
- Instituto de Investigación en Recursos Cinegéticos (IREC), CSIC-UCLM-JCCM, Ciudad Real, Spain
| | | | | | - Barnett A Rattner
- US Geological Survey, Eastern Ecological Science Center, Laurel, Maryland, USA
| |
Collapse
|
4
|
Torres-Ruiz M, de Alba Gonzalez M, Cañas Portilla AI, Coronel R, Liste I, González-Caballero MC. Effects of nanomolar methylmercury on developing human neural stem cells and zebrafish Embryo. Food Chem Toxicol 2024; 188:114684. [PMID: 38663761 DOI: 10.1016/j.fct.2024.114684] [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] [Received: 02/27/2024] [Revised: 04/19/2024] [Accepted: 04/22/2024] [Indexed: 04/29/2024]
Abstract
Exposure to mercury and its organic form methylmercury (MeHg), is of great concern for the developing nervous system. Despite available literature on MeHg neurotoxicity, there is still uncertainty about its mechanisms of action and the doses that trigger developmental effects. Our study combines two alternative methodologies, the human neural stem cells (NSC) and the zebrafish (ZF) embryo, to address the neurotoxic effects of early exposure to nanomolar concentrations of MeHg. Our results show linear or nonmonotonic (hormetic) responses depending on studied parameters. In ZF, we observed a hormetic response in locomotion and larval rotation, but a concentration-dependent response for sensory organ size and habituation. We also observed a possible delayed response as MeHg had greater effects on larval activity at 5 days than at 24 h. In NSC cells, some parameters show a clear dose dependence, such as increased apoptosis and differentiation to glial cells or decreased neuronal precursors; while others show a hormetic response: neuronal differentiation or cell proliferation. This study shows that the ZF model was more susceptible than NSC to MeHg neurotoxicity. The combination of different models has improved the understanding of the underlying mechanisms of toxicity and possible compensatory mechanisms at the cellular and organismal level.
Collapse
Affiliation(s)
- Mónica Torres-Ruiz
- Environmental Toxicology Unit, Centro Nacional de Sanidad Ambiental (CNSA), Instituto de Salud Carlos III (ISCIII), Ctra. Majadahonda-Pozuelo Km. 2,2., Majadahonda, Madrid, 28220, Spain.
| | - Mercedes de Alba Gonzalez
- Environmental Toxicology Unit, Centro Nacional de Sanidad Ambiental (CNSA), Instituto de Salud Carlos III (ISCIII), Ctra. Majadahonda-Pozuelo Km. 2,2., Majadahonda, Madrid, 28220, Spain
| | - Ana I Cañas Portilla
- Environmental Toxicology Unit, Centro Nacional de Sanidad Ambiental (CNSA), Instituto de Salud Carlos III (ISCIII), Ctra. Majadahonda-Pozuelo Km. 2,2., Majadahonda, Madrid, 28220, Spain
| | - Raquel Coronel
- Unidad Funcional de Investigación de Enfermedades Crónicas (UFIEC), Instituto de Salud Carlos III, Madrid, Spain; Departamento de Biología de Sistemas, Facultad de Medicina y Ciencias de la Salud, Universidad de Alcalá, Madrid, Spain
| | - Isabel Liste
- Unidad Funcional de Investigación de Enfermedades Crónicas (UFIEC), Instituto de Salud Carlos III, Madrid, Spain
| | - Mª Carmen González-Caballero
- Environmental Toxicology Unit, Centro Nacional de Sanidad Ambiental (CNSA), Instituto de Salud Carlos III (ISCIII), Ctra. Majadahonda-Pozuelo Km. 2,2., Majadahonda, Madrid, 28220, Spain.
| |
Collapse
|
5
|
Chien HT, de Leeuw VC, van Esterik JCJ, Russel FGM, Kienhuis AS, Theunissen PT, van Meer P. A roadmap towards a human-centric safety assessment of advanced therapy medicinal products. Regul Toxicol Pharmacol 2024; 150:105631. [PMID: 38648873 DOI: 10.1016/j.yrtph.2024.105631] [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] [Received: 11/23/2023] [Revised: 03/29/2024] [Accepted: 04/17/2024] [Indexed: 04/25/2024]
Abstract
Advanced therapy medicinal products (ATMPs) are among the most complex pharmaceuticals with high human specificity. Species differences severely limit the clinical relevance of in vivo data. We conducted interviews with stakeholders involved in ATMP development about their perspective on the use of in vivo studies, the perceived hurdles and associated potential solutions regarding non-clinical development of ATMPs. In total, 17 stakeholders from 9 different countries were interviewed. A workshop was held with key stakeholders to further discuss major topics identified from the interviews. Conducting in vivo studies remains the status quo for ATMPs development. The hurdles identified included determining the amount of information required before clinical entry and effective use of limited human samples to understand a treatment or for clinical monitoring. A number of key points defined the need for future in vivo studies as well as improved application and implementation of New Approach Methodology (NAM)-based approach for products within a well-known modality or technology platform. These included data transparency, understanding of the added value of in vivo studies, and continuous advancement, evaluation, and qualification of NAMs. Based on the outcome of the discussions, a roadmap with practical steps towards a human-centric safety assessment of ATMPs was established.
Collapse
Affiliation(s)
- Hsiao-Tzu Chien
- Medicines Evaluation Board, Utrecht, the Netherlands; Radboud University Medical Center, Nijmegen, the Netherlands.
| | - Victoria C de Leeuw
- Centre for Health Protection, National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Joantine C J van Esterik
- Centre for Health Protection, National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Frans G M Russel
- Medicines Evaluation Board, Utrecht, the Netherlands; Radboud University Medical Center, Nijmegen, the Netherlands
| | - Anne S Kienhuis
- Centre for Health Protection, National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Peter T Theunissen
- Medicines Evaluation Board, Utrecht, the Netherlands; Radboud University Medical Center, Nijmegen, the Netherlands
| | - Peter van Meer
- Medicines Evaluation Board, Utrecht, the Netherlands; Radboud University Medical Center, Nijmegen, the Netherlands
| |
Collapse
|
6
|
Bearth A, Wiesner L, Siegrist M. Public views of animal testing and alternatives in chemical risk assessment. Food Chem Toxicol 2024; 188:114644. [PMID: 38615796 DOI: 10.1016/j.fct.2024.114644] [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] [Received: 02/29/2024] [Revised: 03/27/2024] [Accepted: 04/02/2024] [Indexed: 04/16/2024]
Abstract
Next-Generation Risk Assessment (NGRA) aims to implement New Approach Methodologies (NAMs) into risk assessment and to rely on new in vivo testing in animals only as a last resort. However, various technical and regulatory hurdles impede their regulatory implementation. Assumptions about the public's expectations could act as barriers to the acceptance of NAMs. This study aimed at investigating public views of animal testing and potential alternatives, namely in vitro and in silico testing. An online survey was conducted (N = 965). The results suggest that people make trade-offs, as they experience negative affect regarding in vivo testing, which partly might explain their openness regarding certain alternatives. In vitro tests were attributed the highest ability to determine harmful effects of chemicals for different endpoints, followed by in vivo and in silico tests. Our results further showed that many people accept chemicals to be only tested with alternatives, with highest acceptance for household consumer products, food contact material or building materials and less accepting for medicines and foods. This article addresses potential challenges that might arise from public perceptions and thus, contributes to the bottom-up initiatives to overcome the hurdles to the implementation of NAMs in regulatory risk assessment.
Collapse
Affiliation(s)
- Angela Bearth
- Consumer Behavior, Institute for Environmental Decisions, ETH Zurich, Switzerland.
| | - Lisa Wiesner
- Takeda Pharmaceuticals International AG, Glattpark-Opfikon, Switzerland
| | - Michael Siegrist
- Consumer Behavior, Institute for Environmental Decisions, ETH Zurich, Switzerland
| |
Collapse
|
7
|
Kandárová H, Roper C, Dvořáková M. ESTIV 2022: Key enabling non-animal technologies for research, education and testing. Toxicol In Vitro 2024; 96:105779. [PMID: 38219805 DOI: 10.1016/j.tiv.2024.105779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 01/09/2024] [Indexed: 01/16/2024]
Affiliation(s)
- Helena Kandárová
- Institute of Experimental Pharmacology and Toxicology, Centre of Experimental Medicine, Slovak Academy of Sciences, Bratislava, Slovakia.
| | - Clive Roper
- Roper Toxicology Consulting Limited, Edinburgh, UK
| | | |
Collapse
|
8
|
Acharya B, Dey S, Sahu PK, Behera A, Chowdhury B, Behera S. Perspectives on chick embryo models in developmental and reproductive toxicity screening. Reprod Toxicol 2024; 126:108583. [PMID: 38561097 DOI: 10.1016/j.reprotox.2024.108583] [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] [Received: 11/15/2023] [Revised: 03/18/2024] [Accepted: 03/27/2024] [Indexed: 04/04/2024]
Abstract
Teratology, the study of congenital anomalies and their causative factors intersects with developmental and reproductive toxicology, employing innovative methodologies. Evaluating the potential impacts of teratogens on fetal development and assessing human risk is an essential prerequisite in preclinical research. The chicken embryo model has emerged as a powerful tool for understanding human embryonic development due to its remarkable resemblance to humans. This model offers a unique platform for investigating the effects of substances on developing embryos, employing techniques such as ex ovo and in ovo assays, chorioallantoic membrane assays, and embryonic culture techniques. The advantages of chicken embryonic models include their accessibility, cost-effectiveness, and biological relevance to vertebrate development, enabling efficient screening of developmental toxicity. However, these models have limitations, such as the absence of a placenta and maternal metabolism, impacting the study of nutrient exchange and hormone regulation. Despite these limitations, understanding and mitigating the challenges posed by the absence of a placenta and maternal metabolism are critical for maximizing the utility of the chick embryo model in developmental toxicity testing. Indeed, the insights gained from utilizing these assays and their constraints can significantly contribute to our understanding of the developmental impacts of various agents. This review underscores the utilization of chicken embryonic models in developmental toxicity testing, highlighting their advantages and disadvantages by addressing the challenges posed by their physiological differences from mammalian systems.
Collapse
Affiliation(s)
- Biswajeet Acharya
- School of Pharmacy, Centurion University of Technology and Management, Odisha, India; State Forensic Laboratory, Bhubaneswar, Odisha, India
| | - Sandip Dey
- Birla Institute of Technology, Mesra, Ranchi, Jharkhand, India; State Forensic Laboratory, Bhubaneswar, Odisha, India
| | - Prafulla Kumar Sahu
- School of Pharmacy, Centurion University of Technology and Management, Odisha, India; State Forensic Laboratory, Bhubaneswar, Odisha, India.
| | - Amulyaratna Behera
- School of Pharmacy, Centurion University of Technology and Management, Odisha, India; State Forensic Laboratory, Bhubaneswar, Odisha, India.
| | - Bimalendu Chowdhury
- Roland Institute of Pharmaceutical Sciences, Khodasingi, Brahmapur, Odisha, India; State Forensic Laboratory, Bhubaneswar, Odisha, India
| | - Suchismeeta Behera
- Roland Institute of Pharmaceutical Sciences, Khodasingi, Brahmapur, Odisha, India; State Forensic Laboratory, Bhubaneswar, Odisha, India
| |
Collapse
|
9
|
Garcia da Silva AC, Carvalho Filho SDM, Furtado de Mendonça IC, Valadares MC. Identification of toxicity-induced biomarkers in human non-immune airway cells exposed to respiratory sensitizers: A mechanistic approach. Toxicology 2024; 503:153750. [PMID: 38360295 DOI: 10.1016/j.tox.2024.153750] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/31/2024] [Accepted: 02/07/2024] [Indexed: 02/17/2024]
Abstract
Occupational asthma covers a group of work-related diseases whose clinical manifestations include airway hyperresponsiveness and airflow limitation. Although the chemical respiratory allergy (CRA) induced by Low Molecular Weight (LMW) sensitizers is a major concern, especially in terms of the regulatory framework, to date there are no methods available for preclinically addressing this toxicological outcome, as its mechanistic background is not fully understood at molecular or cellular levels. This paper proposes a mechanistic study applying New Approach Methodologies (NAM) of the pro-inflammatory and functional effects triggered by LMW respiratory allergens in different respiratory tract cell lines, including bronchial epithelial (BEAS-2B), lung fibroblast (MRC-5), and endothelial cells (EA.hy926), and an analysis of the capacity of such chemicals to interact with the mucin protein, to address certain toxicodynamic aspects of such compounds. The results showed that some of the sensitizers evaluated interact with mucin, the main protein mucus component, but the toxicant-mucin complex formation does not seem to be a common feature of different chemical classes of allergens. At a cellular level, sensitizers promoted an increase in IL-8, IL-6, and IL-1β production in the evaluated cell types. It also impaired the MUC1 expression by bronchial cells and activated endothelial cells, thereby increasing the ICAM-I surface expression. Taken together, our results showed that these aforementioned cell types participate in the CRA Adverse Outcome Pathway and must be considered when developing preclinical testing strategies, particularly investigating danger signal production after exposure to LMW sensitizers in different tissue compartments.
Collapse
Affiliation(s)
- Artur Christian Garcia da Silva
- Laboratory of Education and Research in In vitro Toxicology, Faculty of Pharmacy, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Sérgio de Morais Carvalho Filho
- Laboratory of Education and Research in In vitro Toxicology, Faculty of Pharmacy, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | | | - Marize Campos Valadares
- Laboratory of Education and Research in In vitro Toxicology, Faculty of Pharmacy, Universidade Federal de Goiás, Goiânia, GO, Brazil.
| |
Collapse
|
10
|
da Silva ACG, de Mendonça ICF, Valadares MC. Characterization and applicability of a novel physiologically relevant 3D-tetraculture bronchial model for in vitro assessment of respiratory sensitization. Toxicology 2024; 503:153756. [PMID: 38369009 DOI: 10.1016/j.tox.2024.153756] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/29/2024] [Accepted: 02/12/2024] [Indexed: 02/20/2024]
Abstract
Chemical Respiratory Allergy (CRA) is triggered after exposure to Low Molecular Weight (LMW) sensitizers and manifests clinically as asthma and rhinitis. From a risk/toxicity assessment point of view, there are few methods, none of them validated, for evaluating the respiratory sensitization potential of chemicals once the in vivo-based models usually employed for inhalation toxicity addressment do not comprise allergenicity endpoints specifically. Based on that, we developed, characterized, and evaluated the applicability of a 3D-tetraculture airway model reconstructed with bronchial epithelial, fibroblasts, endothelial and monocytic cell lines. Moreover, we exposed the tissue to maleic anhydride (MA) aerosols to challenge the model and subsequently assessed inflammatory and functional aspects of the tissue. The reconstructed tissue presented phenotypic biomarkers compatible with human bronchial epithelium, and MA aerosol exposure triggered an increased IL-8 and IL-6 production, reactive oxygen species (ROS) formation, and apoptosis of epithelial cells. Besides, augmented IL-8 production by monocytic cells was also found, correlating with dendritic cell activation within the co-culture model after MA exposure. Our results demonstrated that the 3D-tetraculture bronchial model presents hallmarks related to human airways' structure and function. Additionally, exposure to a respiratory sensitizer induced inflammatory and functional alterations in the reconstructed tissue, rendering it a valuable tool for exploring the mechanistic framework of chemically induced respiratory sensitization.
Collapse
Affiliation(s)
- Artur Christian Garcia da Silva
- Laboratory of Education and Research in In vitro Toxicology, Faculty of Pharmacy, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | | | - Marize Campos Valadares
- Laboratory of Education and Research in In vitro Toxicology, Faculty of Pharmacy, Universidade Federal de Goiás, Goiânia, GO, Brazil.
| |
Collapse
|
11
|
Schumann P, Rivetti C, Houghton J, Campos B, Hodges G, LaLone C. Combination of computational new approach methodologies for enhancing evidence of biological pathway conservation across species. Sci Total Environ 2024; 912:168573. [PMID: 37981146 PMCID: PMC10926110 DOI: 10.1016/j.scitotenv.2023.168573] [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] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 11/09/2023] [Accepted: 11/12/2023] [Indexed: 11/21/2023]
Abstract
The ability to predict which chemicals are of concern for environmental safety is dependent, in part, on the ability to extrapolate chemical effects across many species. This work investigated the complementary use of two computational new approach methodologies to support cross-species predictions of chemical susceptibility: the US Environmental Protection Agency Sequence Alignment to Predict Across Species Susceptibility (SeqAPASS) tool and Unilever's recently developed Genes to Pathways - Species Conservation Analysis (G2P-SCAN) tool. These stand-alone tools rely on existing biological knowledge to help understand chemical susceptibility and biological pathway conservation across species. The utility and challenges of these combined computational approaches were demonstrated using case examples focused on chemical interactions with peroxisome proliferator activated receptor alpha (PPARα), estrogen receptor 1 (ESR1), and gamma-aminobutyric acid type A receptor subunit alpha (GABRA1). Overall, the biological pathway information enhanced the weight of evidence to support cross-species susceptibility predictions. Through comparisons of relevant molecular and functional data gleaned from adverse outcome pathways (AOPs) to mapped biological pathways, it was possible to gain a toxicological context for various chemical-protein interactions. The information gained through this computational approach could ultimately inform chemical safety assessments by enhancing cross-species predictions of chemical susceptibility. It could also help fulfill a core objective of the AOP framework by potentially expanding the biologically plausible taxonomic domain of applicability of relevant AOPs.
Collapse
Affiliation(s)
- Peter Schumann
- Oak Ridge Institute for Science and Education, Duluth, MN, USA
| | - Claudia Rivetti
- Safety and Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook, Bedfordshire, UK
| | - Jade Houghton
- Safety and Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook, Bedfordshire, UK
| | - Bruno Campos
- Safety and Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook, Bedfordshire, UK
| | - Geoff Hodges
- Safety and Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook, Bedfordshire, UK
| | - Carlie LaLone
- U.S. Environmental Protection Agency, Office of Research and Development, Center for Computational Toxicology and Exposure, Great Lakes Toxicology and Ecology Division, Duluth, MN, USA.
| |
Collapse
|
12
|
Fang J, Rietjens IMCM, Carrillo JC, Boogaard PJ, Kamelia L. Evaluating the in vitro developmental toxicity potency of a series of petroleum substance extracts using new approach methodologies (NAMs). Arch Toxicol 2024; 98:551-565. [PMID: 38085275 PMCID: PMC10794406 DOI: 10.1007/s00204-023-03645-7] [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] [Received: 08/22/2023] [Accepted: 11/16/2023] [Indexed: 01/18/2024]
Abstract
The present study evaluates the in vitro developmental toxicity and the possible underlying mode of action of DMSO extracts of a series of highly complex petroleum substances in the mouse embryonic stem cell test (mEST), the zebrafish embryotoxicity test (ZET) and the aryl hydrocarbon receptor reporter gene assay (AhR CALUX assay). Results show that two out of sixteen samples tested, both being poorly refined products that may contain a substantial amount of 3- to 7-ring polycyclic aromatic compounds (PACs), induced sustained AhR activation in the AhR CALUX assay, and concentration-dependent developmental toxicity in both mEST and ZET. The other samples tested, representing highly refined petroleum substances and petroleum-derived waxes (containing typically a very low amount or no PACs at all), were negative in all assays applied, pointing to their inability to induce developmental toxicity in vitro. The refining processes applied during the production of highly refined petroleum products, such as solvent extraction and hydrotreatment which focus on the removal of undesired constituents, including 3- to 7-ring PACs, abolish the in vitro developmental toxicity. In conclusion, the obtained results support the hypothesis that 3- to 7-ring PACs are the primary inducers of the developmental toxicity induced by some (i.e., poorly refined) petroleum substances and that the observed effect is partially AhR-mediated.
Collapse
Affiliation(s)
- Jing Fang
- Division of Toxicology, Wageningen University and Research, 6708 WE, Wageningen, The Netherlands.
| | - Ivonne M C M Rietjens
- Division of Toxicology, Wageningen University and Research, 6708 WE, Wageningen, The Netherlands
| | | | - Peter J Boogaard
- Division of Toxicology, Wageningen University and Research, 6708 WE, Wageningen, The Netherlands
| | - Lenny Kamelia
- Shell Global Solutions International B.V, 2596 HR, The Hague, The Netherlands
| |
Collapse
|
13
|
Kim D, Shin Y, Kim HS, Park KH, Bae ON. An integrated in vitro approach to identifying chemically induced oxidative stress and toxicity in mitochondria. Chemosphere 2024; 349:140857. [PMID: 38070616 DOI: 10.1016/j.chemosphere.2023.140857] [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: 08/28/2023] [Revised: 11/05/2023] [Accepted: 11/28/2023] [Indexed: 01/10/2024]
Abstract
Growing concerns exist about increasing chemical usage and the potential health risks. Developing an efficient strategy to evaluate or predict the toxicity of chemicals is necessary. The mitochondria are essential organelles for cell maintenance and survival but also serve as one of the main targets of toxic chemicals. Mitochondria play an important role in the pathology of respiratory disease, and many environmental chemicals may induce impairment of the respiratory system through mitochondrial damage. This study aimed to develop integrated in vitro approaches to identify chemicals that could induce adverse health effects by increasing mitochondria-mediated oxidative stress using the H441 cells, which have a club-cell-like phenotype. Twenty-six environmental toxicants (biocides, phthalates, bisphenols, and particles) were tested, and each parameter was compared with eleven reference compounds. The inhibitory concentrations (IC20 and IC50) and benchmark doses (BMD) of the tested compounds were estimated from three in vitro assays, and the toxic concentration was determined. At the lowest IC20, the effects of compounds on mitochondrial reactive oxygen species (ROS) production and mitochondrial membrane potential (MMP) were compared. Principal component analysis and k-mean clustering were performed to cluster the chemicals that had comparable effects on the cells. Chemicals that induce mitochondrial damage at different concentrations were used for an in-depth high-tier assessment and classification as electron transport system (ETS) uncoupling or inhibiting agents. Additionally, using in vitro to in vivo extrapolation (IVIVE) tools, equivalent administration doses and maximum plasma concentrations of tested compounds in human were estimated. This study suggests an in vitro approach to identifying mitochondrial damage by integrating several in vitro toxicity tests and calculation modeling.
Collapse
Affiliation(s)
- Donghyun Kim
- College of Pharmacy Institute of Pharmaceutical Science and Technology, Hanyang University ERICA Campus, Ansan, South Korea.
| | - Yusun Shin
- College of Pharmacy Institute of Pharmaceutical Science and Technology, Hanyang University ERICA Campus, Ansan, South Korea.
| | - Hyung Sik Kim
- Division of Toxicology, School of Pharmacy, Sungkyunkwan University, Suwon, South Korea.
| | - Kyung-Hwa Park
- Division of Chemical Research, National Institute of Environmental Research, Incheon, South Korea.
| | - Ok-Nam Bae
- College of Pharmacy Institute of Pharmaceutical Science and Technology, Hanyang University ERICA Campus, Ansan, South Korea.
| |
Collapse
|
14
|
Piir G, Sild S, Maran U. Interpretable machine learning for the identification of estrogen receptor agonists, antagonists, and binders. Chemosphere 2024; 347:140671. [PMID: 37951393 DOI: 10.1016/j.chemosphere.2023.140671] [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: 05/05/2023] [Revised: 10/25/2023] [Accepted: 11/07/2023] [Indexed: 11/14/2023]
Abstract
An abnormal hormonal activity or exposure to endocrine-disrupting chemicals (EDCs) can cause endocrine system malfunction. Among the many interactions EDCs can affect is the disruption of estrogen signalling, which can lead to adverse health effects such as cancer, osteoporosis, neurodegenerative diseases, cardiovascular disease, insulin resistance, and obesity. Knowing which chemical can act as an EDC is a significant advantage and a practical necessity. New Approach Methodologies (NAM) computational models offer a quick and cost-effective solution for preliminary hazard assessment of chemicals without animal testing. Therefore, a machine learning approach was used to investigate the relationships between estrogen receptor (ER) activity and chemical structure to identify chemicals that can interact with ER. For this purpose, the consolidated in vitro assay data from ToxCast/Tox21 projects was used for developing Random Forest classification models for ER binding, agonists, and antagonists. The overall classification prediction accuracy reaches up to 82%, depending on whether the model predicted agonists, antagonists, or compounds that bind to the active site. Given the imbalance in endocrine disruption data, the derived models are good candidates for deprioritising chemicals and reducing animal testing. The interpretation of theoretical molecular descriptors of the models was consistent with the molecular interactions known in the ligand binding pocket. The estimated class probabilities enabled the analysis of the applicability domain of the developed models and the assessment of the predictions' reliability, followed by the guidelines for interpreting prediction results. The models are openly accessible and useable at QsarDB.org (http://dx.doi.org/10.15152/QDB.259) according to the FAIR (Findable, Accessible, Interoperable, Reusable) principles.
Collapse
Affiliation(s)
- Geven Piir
- Institute of Chemistry, University of Tartu, Ravila 14A, Tartu, 50411, Estonia
| | - Sulev Sild
- Institute of Chemistry, University of Tartu, Ravila 14A, Tartu, 50411, Estonia
| | - Uko Maran
- Institute of Chemistry, University of Tartu, Ravila 14A, Tartu, 50411, Estonia.
| |
Collapse
|
15
|
Lin MS, Varunjikar MS, Lie KK, Søfteland L, Dellafiora L, Ørnsrud R, Sanden M, Berntssen MHG, Dorne JLCM, Bafna V, Rasinger JD. Multi-tissue proteogenomic analysis for mechanistic toxicology studies in non-model species. Environ Int 2023; 182:108309. [PMID: 37980879 DOI: 10.1016/j.envint.2023.108309] [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: 01/25/2023] [Revised: 08/15/2023] [Accepted: 11/04/2023] [Indexed: 11/21/2023]
Abstract
New approach methodologies (NAM), including omics and in vitro approaches, are contributing to the implementation of 3R (reduction, refinement and replacement) strategies in regulatory science and risk assessment. In this study, we present an integrative transcriptomics and proteomics analysis workflow for the validation and revision of complex fish genomes and demonstrate how proteogenomics expression matrices can be used to support multi-level omics data integration in non-model species in vivo and in vitro. Using Atlantic salmon as an example, we constructed proteogenomic databases from publicly available transcriptomic data and in-house generated RNA-Seq and LC-MS/MS data. Our analysis identified ∼80,000 peptides, providing direct evidence of translation for over 40,000 RefSeq structures. The data also highlighted 183 co-located peptide groups that supported a single transcript each, and in each case, either corrected a previous annotation, supported Ensembl annotations not present in RefSeq, or identified novel previously unannotated genes. Proteogenomics data-derived expression matrices revealed distinct profiles for the different tissue types analyzed. Focusing on proteins involved in defense against xenobiotics, we detected distinct expression patterns across different salmon tissues and observed homology in the expression of chemical defense proteins between in vivo and in vitro liver systems. Our study demonstrates the potential of proteogenomic analyses in extending our understanding of complex fish genomes and provides an advanced bioinformatic toolkit to support the further development of NAMs and their application in regulatory science and (eco)toxicological studies of non-model species.
Collapse
Affiliation(s)
- M S Lin
- Bioinformatics and Systems Biology Program, UC San Diego, San Diego, CA, United States.
| | | | - K K Lie
- Institute of Marine Research, Bergen, Norway.
| | - L Søfteland
- Institute of Marine Research, Bergen, Norway.
| | - L Dellafiora
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy.
| | - R Ørnsrud
- Institute of Marine Research, Bergen, Norway.
| | - M Sanden
- Institute of Marine Research, Bergen, Norway.
| | | | - J L C M Dorne
- European Food Safety Authority, Methodological and Scientific Support Unit, Via Carlo Magno 1A, 43121 Parma, Italy.
| | - V Bafna
- Computer Science & Engineering and HDSI, UC San Diego, San Diego, CA, United States.
| | | |
Collapse
|
16
|
Gutmann M, Stimpfl E, Langmann G, Koudelka H, Mir-Karner B, Grasl-Kraupp B. Differentiated and non-differentiated HepaRG™ cells: A possible in-vitro model system for early hepatocarcinogenesis and non-genotoxic carcinogens. Toxicol Lett 2023; 390:15-24. [PMID: 37890683 DOI: 10.1016/j.toxlet.2023.10.014] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 10/17/2023] [Accepted: 10/24/2023] [Indexed: 10/29/2023]
Abstract
Many xenobiotics are non-genotoxic carcinogens (NGC) in rodent liver. Their mode of action (MoA) and health risks for humans are unclear and no in-vitro tests are available to predict NGC. Human HepaRG™ cells in the differentiated (d-HepaRG) and non-differentiated state (nd-HepaRG) were studied as new approach methodology (NAM) for NGC. Cell-biological assays were performed with d-/nd-HepaRG and human hepatoma/hepatocarcinoma cell lines to characterize the benign/malignant phenotype. Reaction of d-/nd-HepaRG to several liver growth factors and NGC (phenobarbital, PB; cyproterone acetate, CPA; WY-14643) was compared to unaltered and premalignant rat hepatocytes in ex-vivo culture. Enzyme induction by NGC was checked by RT-qPCR/oligo-arrays. Growth, anchorage-independency, migration, clonogenicity, and in-vivo tumorigenicity of nd-HepaRG ranged between benign d-HepaRG and malignant hepatoma/hepatocarcinoma cells. All growth factors elevated DNA replication of d-/nd-HepaRG cells, similarly to unaltered/premalignant rat hepatocytes. NGC induced their prototypical enzymes in the rat and human cells, but elicited a growth response only in the unaltered/premalignant rat hepatocytes and not in human d-/nd-HepaRG cells. To conclude, a benign/premalignant phenotype of d-/nd-HepaRG cells and a reactivity towards several hepatic growth factors and NGC, as known from human hepatocytes, are essential components for an in-vitro model for early stage human hepatocarcinogenesis.The potential value as new approach methodology (NAM) for NGC is discussed.
Collapse
Affiliation(s)
- Michael Gutmann
- Center for Cancer Research, Medical University of Vienna, Borschkegasse 8a, 1090 Vienna, Austria
| | - Emily Stimpfl
- Center for Cancer Research, Medical University of Vienna, Borschkegasse 8a, 1090 Vienna, Austria
| | - Gregor Langmann
- Center for Cancer Research, Medical University of Vienna, Borschkegasse 8a, 1090 Vienna, Austria
| | - Helga Koudelka
- Center for Cancer Research, Medical University of Vienna, Borschkegasse 8a, 1090 Vienna, Austria
| | - Birgit Mir-Karner
- Center for Cancer Research, Medical University of Vienna, Borschkegasse 8a, 1090 Vienna, Austria
| | - Bettina Grasl-Kraupp
- Center for Cancer Research, Medical University of Vienna, Borschkegasse 8a, 1090 Vienna, Austria.
| |
Collapse
|
17
|
Hilton GM, Bhuller Y, Doe JE, Wolf DC, Currie RA. A new paradigm for regulatory sciences. Regul Toxicol Pharmacol 2023; 145:105524. [PMID: 37925098 DOI: 10.1016/j.yrtph.2023.105524] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 10/18/2023] [Accepted: 11/01/2023] [Indexed: 11/06/2023]
Abstract
Regulatory science, rooted in legal requirements, provides a mechanism for identifying, assessing, and managing harm to humans and the environment from exposure to hazardous substances. A challenge for regulatory authorities is that many governing laws reflect the scientific paradigm of the mid-20th century. By the nature of legislative processes, most laws are not able to readily adapt to incorporate scientific advances that are inherent in an ever-evolving paradigm. Consequently, the issue of rigid legal frameworks has become prominent in global discussions related to the incorporation of reliable and relevant modern technology to fulfill regulatory needs. To explore this issue, we apply Thomas Kuhn's The Structure of Scientific Revolutions as a conceptual framework to help understand the natural progression of scientific paradigms (from normal science, to anomaly, to crisis, to revolution, and finally to a new normal), identify where we are now in the paradigm cycle, and to explore a path towards a revolution that enables timely implementation of the best available science to fulfil legal requirements.
Collapse
Affiliation(s)
- Gina M Hilton
- PETA Science Consortium International e.V., Stuttgart, Germany.
| | | | - John E Doe
- Liverpool John Moores University, Liverpool, United Kingdom
| | | | | |
Collapse
|
18
|
Ramirez-Hincapie S, Birk B, Ternes P, Giri V, Zickgraf FM, Haake V, Herold M, Kamp H, Driemert P, Landsiedel R, Richling E, Funk-Weyer D, van Ravenzwaay B. Application of high throughput in vitro metabolomics for hepatotoxicity mode of action characterization and mechanistic-anchored point of departure derivation: a case study with nitrofurantoin. Arch Toxicol 2023; 97:2903-2917. [PMID: 37665362 PMCID: PMC10504224 DOI: 10.1007/s00204-023-03572-7] [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] [Received: 05/30/2023] [Accepted: 08/02/2023] [Indexed: 09/05/2023]
Abstract
Omics techniques have been increasingly recognized as promising tools for Next Generation Risk Assessment. Targeted metabolomics offer the advantage of providing readily interpretable mechanistic information about perturbed biological pathways. In this study, a high-throughput LC-MS/MS-based broad targeted metabolomics system was applied to study nitrofurantoin metabolic dynamics over time and concentration and to provide a mechanistic-anchored approach for point of departure (PoD) derivation. Upon nitrofurantoin exposure at five concentrations (7.5 µM, 15 µM, 20 µM, 30 µM and 120 µM) and four time points (3, 6, 24 and 48 h), the intracellular metabolome of HepG2 cells was evaluated. In total, 256 uniquely identified metabolites were measured, annotated, and allocated in 13 different metabolite classes. Principal component analysis (PCA) and univariate statistical analysis showed clear metabolome-based time and concentration effects. Mechanistic information evidenced the differential activation of cellular pathways indicative of early adaptive and hepatotoxic response. At low concentrations, effects were seen mainly in the energy and lipid metabolism, in the mid concentration range, the activation of the antioxidant cellular response was evidenced by increased levels of glutathione (GSH) and metabolites from the de novo GSH synthesis pathway. At the highest concentrations, the depletion of GSH, together with alternations reflective of mitochondrial impairments, were indicative of a hepatotoxic response. Finally, a metabolomics-based PoD was derived by multivariate PCA using the whole set of measured metabolites. This approach allows using the entire dataset and derive PoD that can be mechanistically anchored to established key events. Our results show the suitability of high throughput targeted metabolomics to investigate mechanisms of hepatoxicity and derive point of departures that can be linked to existing adverse outcome pathways and contribute to the development of new ones.
Collapse
Affiliation(s)
| | - Barbara Birk
- BASF SE, Experimental Toxicology and Ecology, Ludwigshafen, Germany
| | | | - Varun Giri
- BASF SE, Experimental Toxicology and Ecology, Ludwigshafen, Germany
| | | | | | | | | | | | - Robert Landsiedel
- BASF SE, Experimental Toxicology and Ecology, Ludwigshafen, Germany
- Pharmacy, Pharmacology and Toxicology, Free University of Berlin, Berlin, Germany
| | - Elke Richling
- Food Chemistry and Toxicology, Department of Chemistry, RPTU Kaiserslautern-Landau, Kaiserslautern, Germany
| | | | | |
Collapse
|
19
|
Cronin MTD, Ball N, Beken S, Bender H, Bercaru O, Caneva L, Corvaro M, Currie RA, Dawson JL, Desert P, Escher SE, Franco A, Irizar A, Mehta JM, Rogiers V, Tremblay RT, Westmoreland C, Maxwell G. Exposure considerations in human safety assessment: Report from an EPAA Partners' Forum. Regul Toxicol Pharmacol 2023; 144:105483. [PMID: 37640101 DOI: 10.1016/j.yrtph.2023.105483] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 08/14/2023] [Accepted: 08/23/2023] [Indexed: 08/31/2023]
Abstract
Understanding and estimating the exposure to a substance is one of the fundamental requirements for safe manufacture and use. Many approaches are taken to determine exposure to substances, mainly driven by potential use and regulatory need. There are many opportunities to improve and optimise the use of exposure information for chemical safety. The European Partnership for Alternative Approaches to Animal Testing (EPAA) therefore convened a Partners' Forum (PF) to explore exposure considerations in human safety assessment of industrial products to agree key conclusions for the regulatory acceptance of exposure assessment approaches and priority areas for further research investment. The PF recognised the widescale use of exposure information across industrial sectors with the possibilities of creating synergies between different sectors. Further, the PF acknowledged that the EPAA could make a significant contribution to promote the use of exposure data in human safety assessment, with an aim to address specific regulatory needs. To achieve this, research needs, as well as synergies and areas for potential collaboration across sectors, were identified.
Collapse
Affiliation(s)
- Mark T D Cronin
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Byrom Street, Liverpool, L3 3AF, United Kingdom.
| | - Nicholas Ball
- Dow Europe GmbH, Bachtobelstrasse, 8810, Horgen, Switzerland.
| | - Sonja Beken
- Federal Agency for Medicines and Health Products (FAMHP), Avenue Galilée 5/03, 1210, Brussels, Belgium.
| | | | - Ofelia Bercaru
- European Chemicals Agency, Telakkakatu 6, Helsinki, Finland.
| | - Laura Caneva
- Zoetis Belgium, Veterinary Medicine Research & Development, Mercuriusstraat 20, B-1930, Zaventem, Belgium.
| | | | - Richard A Currie
- Syngenta Jealott's Hill International Research Centre, Bracknell, RG42 6EY, UK.
| | - Jeffrey L Dawson
- United States Environmental Protection Agency, 1200 Pennsylvania Ave NW, Washington DC, 20004, USA.
| | - Paul Desert
- Sanofi, 1541 avenue Marcel Mérieux, 69280, Marcy l'Etoile, France.
| | - Sylvia E Escher
- Fraunhofer Institute for Toxicology and Experimental Medicine (ITEM), Hannover, Germany.
| | - Antonio Franco
- European Commission, Joint Research Centre (JRC), Ispra, Italy.
| | - Amaia Irizar
- The International Fragrance Association (IFRA), Geneva, Switzerland.
| | | | - Vera Rogiers
- Faculty of Medicine and Pharmacy, In Vitro Toxicology and Dermato-Cosmetology, Vrije Universiteit Brussel, Laarbeeklaan 103, B-1090, Brussels, Belgium.
| | - Raphaël T Tremblay
- Procter & Gamble Services Company, Temselaan 100, 1853 Strombeek-Bever, Belgium.
| | - Carl Westmoreland
- Safety & Environmental Assurance Centre (SEAC), Unilever, Colworth Science Park, Sharnbrook, Bedford, MK44 1LQ, United Kingdom.
| | - Gavin Maxwell
- Safety & Environmental Assurance Centre (SEAC), Unilever, Colworth Science Park, Sharnbrook, Bedford, MK44 1LQ, United Kingdom.
| |
Collapse
|
20
|
Kreutz A, Hu G, Tokar E. Pluripotent Stem Cell-derived Dopaminergic Neurons for Studying Developmental Neurotoxicity. Stem Cell Rev Rep 2023; 19:2120-2130. [PMID: 37273171 PMCID: PMC10579108 DOI: 10.1007/s12015-023-10555-9] [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] [Accepted: 05/08/2023] [Indexed: 06/06/2023]
Abstract
With the vast number of chemicals in commerce, higher throughput strategies are needed to inform risk assessment. The field of toxicology is therefore moving away from traditional in vivo guideline studies towards in vitro new approach methodologies. There has been a great push for such a shift in the field of developmental neurotoxicity, where there is a particular lack of data. A battery of in vitro new approach methodologies has thus been developed to help fill this gap. Included in this battery are assays for numerous processes critical to neurodevelopment, such as proliferation, migration, and synaptogenesis. The current battery of developmental neurotoxicity new approach methodologies still lacks recapitulation of several critical neurodevelopmental processes, including development of neuronal subtypes. With their pluripotency, alongside other advantages, pluripotent stem cells (PSCs) are uniquely suited to address questions of developmental neurotoxicity, as they can recapitulate the different stages of human in vivo neurodevelopment. Among the various neuronal subtypes, development of dopaminergic neurons (DA) is perhaps the best understood and several approaches exist to differentiate PSCs into DA. Herein we review these approaches and propose utilizing PSCs for screening of the impact of environmental chemicals on development of DA. Related techniques and gaps in knowledge are also addressed.
Collapse
Affiliation(s)
- Anna Kreutz
- Mechanistic Toxicology Branch, Division of Translational Toxicology, NIEHS, Research Triangle Park, Durham, NC, 27709, USA.
- Epigenetics and Stem Cell Biology Laboratory, Division of Intramural Research, NIEHS, Research Triangle Park, Durham, NC, 27709, USA.
| | - Guang Hu
- Epigenetics and Stem Cell Biology Laboratory, Division of Intramural Research, NIEHS, Research Triangle Park, Durham, NC, 27709, USA
| | - Erik Tokar
- Mechanistic Toxicology Branch, Division of Translational Toxicology, NIEHS, Research Triangle Park, Durham, NC, 27709, USA
| |
Collapse
|
21
|
Reddy N, Lynch B, Gujral J, Karnik K. Regulatory landscape of alternatives to animal testing in food safety evaluations with a focus on the western world. Regul Toxicol Pharmacol 2023; 143:105470. [PMID: 37591329 DOI: 10.1016/j.yrtph.2023.105470] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 08/09/2023] [Accepted: 08/11/2023] [Indexed: 08/19/2023]
Abstract
Traditional animal models are increasingly being replaced by new approach methodologies (NAMs) which focus on predicting toxicity of chemicals based on mechanistic data rather than apical endpoint data usually obtained from animal models. Beyond in vitro genetic tests, however, only a handful of NAMs have been successfully implemented in regulatory decision-making processes, mostly in the cosmetics and chemicals sector. Regulatory guidance on food safety testing in many jurisdictions still relies on data obtained from animal studies. This is due to the lack of validated models to predict systemic toxicity, which is essential to develop health-based guidance values for food additives. Other factors limiting the adoption of NAMs into food safety assessment include sector legislation lagging behind scientific progress, and lack of training and expertise to use the new models. While regulatory and industry bodies are working to combat these challenges, more needs to be done before these models can be used as standalone tools for regulatory decision-making. This review summarizes the current state and challenges of regulatory acceptance of NAMs for decision-making, and the efforts by governing bodies and industry to transition from animal testing for food safety assessments.
Collapse
Affiliation(s)
- Navya Reddy
- Intertek Health Sciences Inc., 2233 Argentia Rd., Suite 201, Mississauga, ON, L5N 2X7, Canada
| | - Barry Lynch
- Intertek Health Sciences Inc., 2233 Argentia Rd., Suite 201, Mississauga, ON, L5N 2X7, Canada.
| | - Jaspreet Gujral
- Tate & Lyle, 5450 Prairie Stone Pkwy, Hoffman Estates, IL, 60192, USA
| | - Kavita Karnik
- Tate & Lyle PLC, 5 Marble Arch, London, W1H 7EJ, United Kingdom
| |
Collapse
|
22
|
Burbank M, Gautier F, Hewitt N, Detroyer A, Guillet-Revol L, Carron L, Wildemann T, Bringel T, Riu A, Noel-Voisin A, De Croze N, Léonard M, Ouédraogo G. Advancing the use of new approach methodologies for assessing teratogenicity: Building a tiered approach. Reprod Toxicol 2023; 120:108454. [PMID: 37543254 DOI: 10.1016/j.reprotox.2023.108454] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/11/2023] [Accepted: 08/01/2023] [Indexed: 08/07/2023]
Abstract
Many New Approach Methodologies (NAMs) have been developed for the safety assessment of new ingredients. Research into reproductive toxicity and teratogenicity is a particularly high priority, especially given their mechanistic complexity. Forty-six non-teratogenic and 39 teratogenic chemicals were screened for teratogenic potential using the in silico DART model from the OECD QSAR Toolbox; the devTox quickPredict™ (devTox assay) test and the Zebrafish Embryotoxicity Test (ZET). The sensitivity and specificity were 94.7% and 84.1%, respectively, for the DART tree (83 chemicals), 86.1% and 35.6% for the devTox (81 chemicals) and 77.8% and 76.7% for the ZET (57 chemicals). Fifty-three chemicals were tested in all three assays and when results were combined and based on a "2 out of 3 rule", the sensitivity and specificity were 96.0% and 71.4%, respectively. The specificity of the devTox assay for a sub-set of 43 chemicals was increased from 26.1% to 82.6% by incorporating human plasma concentrations into the assay interpretation. When all 85 chemicals were assessed in a decision tree approach, there was an excellent predictivity and assay robustness of 90%. In conclusion, all three models exhibited a good sensitivity and specificity, especially when outcomes from all three were combined or used in "2 out of 3" or a tiered decision tree approach. The latter is an interesting predictive approach for evaluating the teratogenic potential of new chemicals. Future investigations will extend the number of chemicals tested, as well as explore ways to refine the results and obtain a robust Integrated Testing Strategy to evaluate teratogenic potential.
Collapse
Affiliation(s)
- M Burbank
- L'Oréal Research & Innovation, France.
| | - F Gautier
- L'Oréal Research & Innovation, France
| | | | | | | | - L Carron
- L'Oréal Research & Innovation, France
| | | | - T Bringel
- L'Oréal Research & Innovation, France
| | - A Riu
- L'Oréal Research & Innovation, France
| | | | | | - M Léonard
- L'Oréal Research & Innovation, France
| | | |
Collapse
|
23
|
Reddy N, Lynch B, Gujral J, Karnik K. Alternatives to animal testing in toxicity testing: Current status and future perspectives in food safety assessments. Food Chem Toxicol 2023; 179:113944. [PMID: 37453475 DOI: 10.1016/j.fct.2023.113944] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 06/29/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
The development of alternative methods to animal testing has gained great momentum since Russel and Burch introduced the "3Rs" concept of Reduction, Refinement, and Replacement of animals in safety testing in 1959. Several alternatives to animal testing have since been introduced, including but not limited to in vitro and in chemico test systems, in silico models, and computational models (e.g., [quantitative] structural activity relationship models, high-throughput screens, organ-on-chip models, and genomics or bioinformatics) to predict chemical toxicity. Furthermore, several agencies have developed robust integrated testing strategies to determine chemical toxicity. The cosmetics sector is pioneering the adoption of alternative methodologies for safety evaluations, and other sectors are aiming to completely abandon animal testing by 2035. However, beyond the use of in vitro genetic testing, agencies regulating the food industry have been slow to implement alternative methodologies into safety evaluations compared with other sectors; setting health-based guidance values for food ingredients requires data from systemic toxicity, and to date, no standalone validated alternative models to assess systemic toxicity exist. The abovementioned models show promise for assessing systemic toxicity with further research. In this paper, we review the current alternatives and their applicability and limitations in food safety evaluations.
Collapse
Affiliation(s)
- Navya Reddy
- Intertek Health Sciences Inc., 2233 Argentia Rd, Suite 201, Mississauga, ON, L5N 2X7, Canada
| | - Barry Lynch
- Intertek Health Sciences Inc., 2233 Argentia Rd, Suite 201, Mississauga, ON, L5N 2X7, Canada.
| | - Jaspreet Gujral
- Tate & Lyle, 5450 Prairie Stone Pkwy, Hoffman Estates, IL, 60192, USA
| | - Kavita Karnik
- Tate & Lyle PLC, 5 Marble Arch, London, W1H 7EJ, United Kingdom
| |
Collapse
|
24
|
Schmeisser S, Miccoli A, von Bergen M, Berggren E, Braeuning A, Busch W, Desaintes C, Gourmelon A, Grafström R, Harrill J, Hartung T, Herzler M, Kass GEN, Kleinstreuer N, Leist M, Luijten M, Marx-Stoelting P, Poetz O, van Ravenzwaay B, Roggeband R, Rogiers V, Roth A, Sanders P, Thomas RS, Marie Vinggaard A, Vinken M, van de Water B, Luch A, Tralau T. New approach methodologies in human regulatory toxicology - Not if, but how and when! Environ Int 2023; 178:108082. [PMID: 37422975 PMCID: PMC10858683 DOI: 10.1016/j.envint.2023.108082] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 06/30/2023] [Accepted: 07/01/2023] [Indexed: 07/11/2023]
Abstract
The predominantly animal-centric approach of chemical safety assessment has increasingly come under pressure. Society is questioning overall performance, sustainability, continued relevance for human health risk assessment and ethics of this system, demanding a change of paradigm. At the same time, the scientific toolbox used for risk assessment is continuously enriched by the development of "New Approach Methodologies" (NAMs). While this term does not define the age or the state of readiness of the innovation, it covers a wide range of methods, including quantitative structure-activity relationship (QSAR) predictions, high-throughput screening (HTS) bioassays, omics applications, cell cultures, organoids, microphysiological systems (MPS), machine learning models and artificial intelligence (AI). In addition to promising faster and more efficient toxicity testing, NAMs have the potential to fundamentally transform today's regulatory work by allowing more human-relevant decision-making in terms of both hazard and exposure assessment. Yet, several obstacles hamper a broader application of NAMs in current regulatory risk assessment. Constraints in addressing repeated-dose toxicity, with particular reference to the chronic toxicity, and hesitance from relevant stakeholders, are major challenges for the implementation of NAMs in a broader context. Moreover, issues regarding predictivity, reproducibility and quantification need to be addressed and regulatory and legislative frameworks need to be adapted to NAMs. The conceptual perspective presented here has its focus on hazard assessment and is grounded on the main findings and conclusions from a symposium and workshop held in Berlin in November 2021. It intends to provide further insights into how NAMs can be gradually integrated into chemical risk assessment aimed at protection of human health, until eventually the current paradigm is replaced by an animal-free "Next Generation Risk Assessment" (NGRA).
Collapse
Affiliation(s)
| | - Andrea Miccoli
- German Federal Institute for Risk Assessment (BfR), Berlin, Germany; National Research Council, Ancona, Italy
| | - Martin von Bergen
- Helmholtz Centre for Environmental Research-UFZ, Leipzig, Germany; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany; University of Leipzig, Faculty of Life Sciences, Institute of Biochemistry, Leipzig, Germany
| | | | - Albert Braeuning
- German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Wibke Busch
- Helmholtz Centre for Environmental Research-UFZ, Leipzig, Germany
| | - Christian Desaintes
- European Commission (EC), Directorate General for Research and Innovation (RTD), Brussels, Belgium
| | - Anne Gourmelon
- Organisation for Economic Cooperation and Development (OECD), Environment Directorate, Paris, France
| | | | - Joshua Harrill
- Center for Computational Toxicology and Exposure (CCTE), United States Environmental Protection Agency (US EPA), Durham, USA
| | - Thomas Hartung
- Center for Alternatives to Animal Testing (CAAT), Johns Hopkins Bloomberg School of Public Health Baltimore MD USA, CAAT-Europe, University of Konstanz, Konstanz, Germany
| | - Matthias Herzler
- German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | | | - Nicole Kleinstreuer
- NTP Interagency Center for the Evaluation of Alternative Toxicological Methods (NICEATM), National Institute of Environmental Health Sciences (NIEHS), Durham, USA
| | - Marcel Leist
- CAAT‑Europe and Department of Biology, University of Konstanz, Konstanz, Germany
| | - Mirjam Luijten
- Centre for Health Protection, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | | | - Oliver Poetz
- NMI Natural and Medical Science Institute at the University of Tuebingen, Reutlingen, Germany; SIGNATOPE GmbH, Reutlingen, Germany
| | | | - Rob Roggeband
- European Partnership for Alternative Approaches to Animal Testing (EPAA), Procter and Gamble Services Company NV/SA, Strombeek-Bever, Belgium
| | - Vera Rogiers
- Scientific Committee on Consumer Safety (SCCS), Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Adrian Roth
- F. Hoffmann-La Roche Ltd, Basel, Switzerland
| | - Pascal Sanders
- Fougeres Laboratory, French Agency for Food, Environmental and Occupational Health and Safety (ANSES), Fougères, France France
| | - Russell S Thomas
- Center for Computational Toxicology and Exposure (CCTE), United States Environmental Protection Agency (US EPA), Durham, USA
| | | | | | | | - Andreas Luch
- German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Tewes Tralau
- German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| |
Collapse
|
25
|
Carnesecchi E, Langezaal I, Browne P, Batista-Leite S, Campia I, Coecke S, Dagallier B, Deceuninck P, Dorne JLC, Tarazona JV, Le Goff F, Leinala E, Morath S, Munn S, Richardson J, Paini A, Wittwehr C. OECD harmonised template 201: Structuring and reporting mechanistic information to foster the integration of new approach methodologies for hazard and risk assessment of chemicals. Regul Toxicol Pharmacol 2023:105426. [PMID: 37277057 DOI: 10.1016/j.yrtph.2023.105426] [Citation(s) in RCA: 2] [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] [Received: 12/23/2022] [Revised: 05/31/2023] [Accepted: 06/02/2023] [Indexed: 06/07/2023]
Abstract
In the European Union, the Chemicals Strategy for Sustainability (CSS) highlights the need to enhance the identification and assessment of substances of concern while reducing animal testing, thus fostering the development and use of New Approach Methodologies (NAMs) such as in silico, in vitro and in chemico. In the United States, the Tox21 strategy aims at shifting toxicological assessments away from traditional animal studies towards target-specific, mechanism-based and biological observations mainly obtained by using NAMs. Many other jurisdictions around the world are also increasing the use of NAMs. Hence, the provision of dedicated non-animal toxicological data and reporting formats as a basis for chemical risk assessment is necessary. Harmonising data reporting is crucial when aiming at re-using and sharing data for chemical risk assessment across jurisdictions. The OECD has developed a series of OECD Harmonised Templates (OHT), which are standard data formats designed for reporting information used for the risk assessment of chemicals relevant to their intrinsic properties, including effects on human health (e.g., toxicokinetics, skin sensitisation, repeated dose toxicity) and the environment (e.g., toxicity to test species and wildlife, biodegradation in soil, metabolism of residues in crops). The objective of this paper is to demonstrate the applicability of the OHT standard format for reporting information under various chemical risk assessment regimes, and to provide users with practical guidance on the use of OHT 201, in particular to report test results on intermediate effects and mechanistic information.
Collapse
Affiliation(s)
- Edoardo Carnesecchi
- Organisation for Economic Co-operation and Development (OECD), Environment Directorate, 75775, Paris CEDEX 16, France.
| | | | - Patience Browne
- Organisation for Economic Co-operation and Development (OECD), Environment Directorate, 75775, Paris CEDEX 16, France
| | | | - Ivana Campia
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Sandra Coecke
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Bertrand Dagallier
- Organisation for Economic Co-operation and Development (OECD), Environment Directorate, 75775, Paris CEDEX 16, France
| | | | - Jean Lou Cm Dorne
- European Food Safety Authority (EFSA), Via Carlo Magno, 1A, 43126, Parma, Italy
| | - Jose V Tarazona
- European Food Safety Authority (EFSA), Via Carlo Magno, 1A, 43126, Parma, Italy
| | - Francois Le Goff
- European Chemicals Agency (ECHA), Telakkakatu 6, P.O. Box 400, FI-0012, Helsinki, Finland
| | - Eeva Leinala
- Organisation for Economic Co-operation and Development (OECD), Environment Directorate, 75775, Paris CEDEX 16, France
| | | | - Sharon Munn
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Jane Richardson
- European Food Safety Authority (EFSA), Via Carlo Magno, 1A, 43126, Parma, Italy
| | - Alicia Paini
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | | |
Collapse
|
26
|
Evangelisti M, Parenti MD, Varchi G, Franco J, Vom Brocke J, Karamertzanis PG, Del Rio A, Bichlmaier I. A non-clinical and clinical IUCLID database for 530 pharmaceuticals (part I): Methodological aspects of its development. Regul Toxicol Pharmacol 2023:105416. [PMID: 37253405 DOI: 10.1016/j.yrtph.2023.105416] [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] [Received: 12/06/2022] [Revised: 05/04/2023] [Accepted: 05/21/2023] [Indexed: 06/01/2023]
Abstract
A new IUCLID database is provided containing results from non-clinical animal studies and human information for 530 approved drugs. The database was developed by extracting data from pharmacological reviews of repeat-dose, carcinogenicity, developmental, and reproductive toxicity studies. In the database, observed and no-observed effects are linked to the respective effect levels, including information on severity/incidence and transiency/reversibility. It also includes some information on effects in humans, that were extracted from relevant sections of standard product labels of the approved drugs. The database is complemented with a specific ontology for reporting effects that was developed as an improved version of the Ontology Lookup Service's mammalian and human phenotype ontologies and includes different hierarchical levels. The developed ontology contains novel and unique standardized terms, including ontological terms for reproductive and endocrine effects. The new IUCLID database aims to facilitate correlation and concordance analyses based on the link between observed and no-observed effects and their respective effect levels. In addition, it offers a robust dataset on drug information for the pharmaceutical industry and research. The reported ontology supports the analyses of toxicological information, especially for reproductive and endocrine endpoints and can be used to encode legacy data or develop additional ontologies. The new database and ontology can be used to support the development of alternative non-animal approaches, to elucidate mechanisms of toxicity, and to analyse human relevance. The IUCLID database is provided free of charge at https://iuclid6.echa.europa.eu/us-fda-toxicity-data.
Collapse
Affiliation(s)
| | - Marco Daniele Parenti
- Innovamol Consulting Srl, Via San Faustino 167, 41126, Modena, Italy; ISOF - CNR, Via Piero Gobetti 101, 40129, Bologna, Italy
| | - Greta Varchi
- ISOF - CNR, Via Piero Gobetti 101, 40129, Bologna, Italy
| | - Jorge Franco
- Innovamol Consulting Srl, Via San Faustino 167, 41126, Modena, Italy; Genoa University, Via Balbi 5, 16126, Genoa, Italy
| | - Jochen Vom Brocke
- European Chemicals Agency (ECHA), Telakkakatu 6, 00150, Helsinki, Finland
| | | | - Alberto Del Rio
- Innovamol Consulting Srl, Via San Faustino 167, 41126, Modena, Italy; ISOF - CNR, Via Piero Gobetti 101, 40129, Bologna, Italy.
| | - Ingo Bichlmaier
- European Chemicals Agency (ECHA), Telakkakatu 6, 00150, Helsinki, Finland.
| |
Collapse
|
27
|
Sonnenburg A, Stahlmann R, Kreutz R, Peiser M. A new cell line based coculture system for skin sensitisation testing in one single assay using T cells, aryl hydrocarbon receptor knockout, and co-inhibitory blockage. Arch Toxicol 2023; 97:1677-1689. [PMID: 37147507 PMCID: PMC10182954 DOI: 10.1007/s00204-023-03506-3] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 04/24/2023] [Indexed: 05/07/2023]
Abstract
Established in vitro assays for regulatory testing of skin sensitisation partly suffer from only moderate sensitivity, specificity, and predictivity when testing specific groups of chemicals. This may be due to limited biomarker response in vitro in cell types that interact as crucial players of in vivo skin sensitisation pathogenesis. Here, we propose a molecular approach to overcome this limitation. In our model, we apply genome editing and blocking of immunoregulatory molecules to increase the range of biomarker modulation by sensitising chemicals. To this end, aryl hydrocarbon receptor (AhR) knockout was done by CRISPR/Cas9 technology in THP-1 cells and combined with Programmed Cell Death-Ligand (PD-L)1 blockade. AhR-knockout THP-1 in coculture with HaCaT keratinocytes showed increased CD54 expression compared to wild type cells after stimulation with 10 µmol/L dinitrochlorobenzene (DNCB) that was further enhanced by anti-PD-L1. After stimulation of AhR-knockout THP-1 with 200 µmol/L mercaptobenzothiazol or 10 µmol/L DNCB, cocultivated Jurkat T cells significantly increased expression of T cell receptor-associated CD3. No such increase was detected after prior treatment of THP-1 with 150 µmol/L of irritant sodium lauryl sulphate. Additionally, higher levels of inflammatory cytokines MIP-3α, MIP-1β, TNF-α, and IL-8 were found in supernatants of enhanced loose-fit co-culture based sensitisation assay (eLCSA) after substance treatment. Hence, eLCSA allowed to discriminate between sensitisers and non-sensitisers. Thus, inhibition of immunoinhibitory pathway signalling by combining AhR knockout and PD-L1 antibody blockage into an assay involving main acting cell types in skin sensitisation may increase sensitivity and specificity of such assays and allow potency derivation.
Collapse
Affiliation(s)
- Anna Sonnenburg
- Institute for Clinical Pharmacology and Toxicology, Charité-Universitätsmedizin Berlin, Berlin, Germany.
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany.
- Department Pesticides Safety, German Federal Institute for Risk Assessment, Berlin, Germany.
| | - Ralf Stahlmann
- Institute for Clinical Pharmacology and Toxicology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Reinhold Kreutz
- Institute for Clinical Pharmacology and Toxicology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Matthias Peiser
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
- Department Food Safety, German Federal Institute for Risk Assessment, Berlin, Germany
| |
Collapse
|
28
|
da Silva ACG, de Morais Carvalho Filho S, Valadares MC. Biological effects triggered by chemical respiratory sensitizers on THP-1 monocytic cells. Toxicol In Vitro 2023; 90:105602. [PMID: 37146919 DOI: 10.1016/j.tiv.2023.105602] [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] [Received: 08/15/2022] [Revised: 03/27/2023] [Accepted: 04/10/2023] [Indexed: 05/07/2023]
Abstract
Respiratory sensitization encompasses a group of diseases that manifest through airway hyperresponsiveness and airflow limitation. Although the concerns regarding human health, to date there are still no validated methods for preclinical assessment of this class of toxicants once the chemical respiratory allergy mechanistic framework is not fully understood. As Dendritic Cells (DCs) are the bridging elements between innate and adaptative immune responses, we preliminarily investigated the biological alterations triggered by seven different LMW respiratory allergens in the DC model THP-1. The results have shown that exposure to respiratory allergens promoted alterations in DCs maturation/activation status and triggered pro-inflammatory changes in these cells through increased expression for the CD86/HLA-DR/CD11c surface biomarkers and enhancement in IL-8 and IL-6 production by exposed THP-1 cells. Therefore, evidence was found to support the startpoint for chemical respiratory allergy pathogenesis elucidation, subsidizing the contribution of dendritic cells in such pathomechanisms.
Collapse
Affiliation(s)
- Artur Christian Garcia da Silva
- Laboratory of Education and Research in In vitro Toxicology, Faculty of Pharmacy, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Sérgio de Morais Carvalho Filho
- Laboratory of Education and Research in In vitro Toxicology, Faculty of Pharmacy, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Marize Campos Valadares
- Laboratory of Education and Research in In vitro Toxicology, Faculty of Pharmacy, Universidade Federal de Goiás, Goiânia, GO, Brazil.
| |
Collapse
|
29
|
Earl Gray L. Biologically relevant reductions in fetal testosterone and Insl3 induced by in utero exposure to high levels of di-isononyl phthalate (DINP) in male rats. Toxicol Appl Pharmacol 2023; 465:116454. [PMID: 36921846 PMCID: PMC10405973 DOI: 10.1016/j.taap.2023.116454] [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] [Received: 10/30/2022] [Revised: 03/02/2023] [Accepted: 03/04/2023] [Indexed: 03/16/2023]
Abstract
Some phthalate esters alter male rat reproductive development during sexual differentiation by interfering with fetal testis maturation resulting in reduced Leydig Cell synthesis of testosterone and insulin-like 3 (Insl3) hormones. Gene transcripts associated with steroid hormone and cholesterol transport, and cholesterol synthesis and lipid metabolism also are reduced. These alterations cause permanent malformations of hormone-dependent tissues, sperm production and fertility in male offspring; effects known as the "Phthalate Syndrome." We have shown that administration of a high dose of 750 mg diisononyl phthalate (750 mg/kg/d DINP) during sex differentiation reduced fetal testis testosterone production (T Prod), testis gene expression and induced a low incidence of reproductive malformations in male rat offspring. In the current study we administered DINP at even higher dose levels (1.0 and 1.5 g/kg/d) from gestational day (GD) 14 to postnatal (PND) 3 to determine if these effects were dose related and if the magnitude of the effects could be predicted from a statistical model of fetal testosterone production (T Prod) and Insl3 mRNA levels. These models were previously developed using dipentyl phthalate (DPeP) data from fetal T Prod and postnatal studies. We found that the severity of the demasculinizing effects on the androgen-dependent organs and gubernaculum by DINP were accurately predicted from the statistical models of fetal T prod and Insl3 mRNA, respectively. Taken together, our results indicate that reductions fetal T prod and Insl3 predict the severity of demasculinizing effects in utero exposure to the phthalates DINP and DPeP regardless of potency.
Collapse
Affiliation(s)
- L Earl Gray
- Reproductive And Developmental Toxicology Branch, PHITD, CPHEA, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, Mail Drop-72, NC 27711, United States of America.
| |
Collapse
|
30
|
Cronin MTD, Belfield SJ, Briggs KA, Enoch SJ, Firman JW, Frericks M, Garrard C, Maccallum PH, Madden JC, Pastor M, Sanz F, Soininen I, Sousoni D. Making in silico predictive models for toxicology FAIR. Regul Toxicol Pharmacol 2023; 140:105385. [PMID: 37037390 DOI: 10.1016/j.yrtph.2023.105385] [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] [Received: 01/03/2023] [Revised: 02/18/2023] [Accepted: 04/07/2023] [Indexed: 04/12/2023]
Abstract
In silico predictive models for toxicology include quantitative structure-activity relationship (QSAR) and physiologically based kinetic (PBK) approaches to predict physico-chemical and ADME properties, toxicological effects and internal exposure. Such models are used to fill data gaps as part of chemical risk assessment. There is a growing need to ensure in silico predictive models for toxicology are available for use and reproducible. This paper describes how the FAIR (Findable, Accessible, Interoperable, Reusable) principles, developed for data sharing, have been applied to in silico predictive models. In particular, this investigation has focussed on how the FAIR principles could be applied to improved regulatory acceptance of predictions from such models. Eighteen principles have been developed that cover all aspects of FAIR. It is intended that FAIRification of in silico predictive models for toxicology will increase their use and acceptance.
Collapse
Affiliation(s)
- Mark T D Cronin
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Byrom Street, Liverpool, L3 3AF, UK.
| | - Samuel J Belfield
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Byrom Street, Liverpool, L3 3AF, UK
| | - Katharine A Briggs
- Lhasa Limited, Granary Wharf House, 2 Canal Wharf, Holbeck, Leeds, LS11 5PS, UK
| | - Steven J Enoch
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Byrom Street, Liverpool, L3 3AF, UK
| | - James W Firman
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Byrom Street, Liverpool, L3 3AF, UK
| | - Markus Frericks
- BASF SE, APD/ET - Li 444, Speyerer St 2, 67117, Limburgerhof, Germany
| | - Clare Garrard
- ELIXIR, Wellcome Genome Campus, Hinxton, Cambridgeshire, CB10 1SD, UK
| | - Peter H Maccallum
- ELIXIR, Wellcome Genome Campus, Hinxton, Cambridgeshire, CB10 1SD, UK
| | - Judith C Madden
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Byrom Street, Liverpool, L3 3AF, UK
| | - Manuel Pastor
- Research Programme on Biomedical Informatics (GRIB), Hospital del Mar Medical Research Institute (IMIM), Dept. of Medicine and Life Sciences (MELIS), Universitat Pompeu Fabra, Carrer Dr. Aiguader 88, 08003, Barcelona, Spain
| | - Ferran Sanz
- Research Programme on Biomedical Informatics (GRIB), Hospital del Mar Medical Research Institute (IMIM), Dept. of Medicine and Life Sciences (MELIS), Universitat Pompeu Fabra, Carrer Dr. Aiguader 88, 08003, Barcelona, Spain
| | - Inari Soininen
- Synapse Research Management Partners SL, Calle Velazquez 94, planta 1, 28006, Madrid, Spain
| | - Despoina Sousoni
- ELIXIR, Wellcome Genome Campus, Hinxton, Cambridgeshire, CB10 1SD, UK
| |
Collapse
|
31
|
Ceger P, Allen D, Blankinship A, Choksi N, Daniel A, Eckel WP, Hamm J, Harwood DE, Johnson T, Kleinstreuer N, Sprankle CS, Truax J, Lowit M. Evaluation of the fish acute toxicity test for pesticide registration. Regul Toxicol Pharmacol 2023; 139:105340. [PMID: 36702196 DOI: 10.1016/j.yrtph.2023.105340] [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] [Received: 10/03/2022] [Revised: 01/01/2023] [Accepted: 01/21/2023] [Indexed: 01/25/2023]
Abstract
The U.S. Environmental Protection Agency (USEPA) uses the in vivo fish acute toxicity test to assess potential risk of substances to non-target aquatic vertebrates. The test is typically conducted on a cold and a warm freshwater species and a saltwater species for a conventional pesticide registration, potentially requiring upwards of 200 or more fish. A retrospective data evaluation was conducted to explore the potential for using fewer fish species to support conventional pesticide risk assessments. Lethal concentration 50% (LC50) values and experimental details were extracted and curated from 718 studies on fish acute toxicity submitted to USEPA. The LC50 data were analysed to determine, when possible, the relative sensitivity of the tested species to each pesticide. One of the tested freshwater species was most sensitive in 85% of those cases. The tested cold freshwater species was the most sensitive overall among cases with established relative sensitivity and was within 3X of the LC50 value of the most sensitive species tested in 98% of those cases. The results support potentially using fewer than three fish species to conduct ecological risk assessments for the registration of conventional pesticides.
Collapse
Affiliation(s)
- Patricia Ceger
- Inotiv, P.O. Box 13501, Research Triangle Park, NC, 27709, USA.
| | - David Allen
- Inotiv, P.O. Box 13501, Research Triangle Park, NC, 27709, USA.
| | - Amy Blankinship
- U.S. Environmental Protection Agency, Office of Pesticide Programs, MC7507M, 1200 Pennsylvania Ave. NW, Washington, DC, 20460, USA.
| | - Neepa Choksi
- Inotiv, P.O. Box 13501, Research Triangle Park, NC, 27709, USA.
| | - Amber Daniel
- Inotiv, P.O. Box 13501, Research Triangle Park, NC, 27709, USA.
| | - William P Eckel
- U.S. Environmental Protection Agency, Office of Pesticide Programs, MC7507M, 1200 Pennsylvania Ave. NW, Washington, DC, 20460, USA.
| | - Jon Hamm
- National Toxicology Program Interagency Center for the Evaluation of Alternative Toxicological Methods, National Institute of Environmental Health Sciences, P.O. Box 12233, Research Triangle Park, NC, 27709, USA.
| | - D Ethan Harwood
- U.S. Environmental Protection Agency, Office of Pesticide Programs, MC7507M, 1200 Pennsylvania Ave. NW, Washington, DC, 20460, USA.
| | - Tamara Johnson
- U.S. Environmental Protection Agency, Office of Pesticide Programs, MC7507M, 1200 Pennsylvania Ave. NW, Washington, DC, 20460, USA.
| | - Nicole Kleinstreuer
- National Toxicology Program Interagency Center for the Evaluation of Alternative Toxicological Methods, National Institute of Environmental Health Sciences, P.O. Box 12233, Research Triangle Park, NC, 27709, USA.
| | | | - James Truax
- Inotiv, P.O. Box 13501, Research Triangle Park, NC, 27709, USA.
| | - Michael Lowit
- U.S. Environmental Protection Agency, Office of Pesticide Programs, MC7507M, 1200 Pennsylvania Ave. NW, Washington, DC, 20460, USA.
| |
Collapse
|
32
|
Nicola MRD, Cattaneo I, Nathanail AV, Carnesecchi E, Astuto MC, Steinbach M, Williams AJ, Charles S, Gestin O, Lopes C, Lamonica D, Tarazona JV, Dorne JLCM. The use of new approach methodologies for the environmental risk assessment of food and feed chemicals. Curr Opin Environ Sci Health 2023; 31:1-8. [PMID: 36741274 PMCID: PMC9890323 DOI: 10.1016/j.coesh.2022.100416] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
New Approach Methodologies (NAMs) provide tools for supporting both human and environmental risk assessment (HRA and ERA). This short review provides recent insights regarding the use of NAMs in ERA of food and feed chemicals. We highlight the usefulness of tiered methods supporting weight-of-evidence approaches in relation to problem formulation (i.e., data availability, time, and resource availability). In silico models, including quantitative structure activity relationship models, support filling data gaps when no chemical property or ecotoxicological data are available, and biologically-based models (e.g., toxicokinetic-toxicodynamic models, dynamic energy models, physiologically-based models and species sensitivity distributions) are applicable in more data rich situations, including landscape-based modelling approaches. Particular attention is given to provide practical examples to apply the approaches described in real-world settings. We conclude with future perspectives, with regards to the need for addressing complex challenges such as chemical mixtures and multiple stressors in a wide range of organisms and ecosystems.
Collapse
Affiliation(s)
- Matteo Riccardo Di Nicola
- IRCCS San Raffaele Hospital, Unit of Dermatology, Milan, Italy
- Asociación Herpetológica Española, Madrid, Spain
| | | | | | | | | | | | - Antony John Williams
- Center for Computational Toxicology and Exposure, Office of Research and Development, U.S. Environmental Protection Agency (U.S. EPA), Research Triangle Park, NC, USA
| | - Sandrine Charles
- University of Lyon, University Lyon 1, UMR CNRS 5558, Villeurbanne, France
| | - Ophélia Gestin
- University of Lyon, University Lyon 1, UMR CNRS 5558, Villeurbanne, France
- INRAE, Riverly, Ecotoxicology, Lyon, France
- University of La Rochelle, UMRi 7266, La Rochelle, France
| | - Christelle Lopes
- University of Lyon, University Lyon 1, UMR CNRS 5558, Villeurbanne, France
| | - Dominique Lamonica
- University of Lyon, University Lyon 1, UMR CNRS 5558, Villeurbanne, France
| | - Jose Vicente Tarazona
- Spanish National Environmental Health Centre, Instituto de Salud Carlos III, Ministry of Science and Innovation, 28220 Majadahonda, Madrid, Spain
| | | |
Collapse
|
33
|
Bajard L, Adamovsky O, Audouze K, Baken K, Barouki R, Beltman JB, Beronius A, Bonefeld-Jørgensen EC, Cano-Sancho G, de Baat ML, Di Tillio F, Fernández MF, FitzGerald RE, Gundacker C, Hernández AF, Hilscherova K, Karakitsios S, Kuchovska E, Long M, Luijten M, Majid S, Marx-Stoelting P, Mustieles V, Negi CK, Sarigiannis D, Scholz S, Sovadinova I, Stierum R, Tanabe S, Tollefsen KE, van den Brand AD, Vogs C, Wielsøe M, Wittwehr C, Blaha L. Application of AOPs to assist regulatory assessment of chemical risks - Case studies, needs and recommendations. Environ Res 2023; 217:114650. [PMID: 36309218 PMCID: PMC9850416 DOI: 10.1016/j.envres.2022.114650] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [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: 09/02/2022] [Revised: 10/18/2022] [Accepted: 10/21/2022] [Indexed: 05/06/2023]
Abstract
While human regulatory risk assessment (RA) still largely relies on animal studies, new approach methodologies (NAMs) based on in vitro, in silico or non-mammalian alternative models are increasingly used to evaluate chemical hazards. Moreover, human epidemiological studies with biomarkers of effect (BoE) also play an invaluable role in identifying health effects associated with chemical exposures. To move towards the next generation risk assessment (NGRA), it is therefore crucial to establish bridges between NAMs and standard approaches, and to establish processes for increasing mechanistically-based biological plausibility in human studies. The Adverse Outcome Pathway (AOP) framework constitutes an important tool to address these needs but, despite a significant increase in knowledge and awareness, the use of AOPs in chemical RA remains limited. The objective of this paper is to address issues related to using AOPs in a regulatory context from various perspectives as it was discussed in a workshop organized within the European Union partnerships HBM4EU and PARC in spring 2022. The paper presents examples where the AOP framework has been proven useful for the human RA process, particularly in hazard prioritization and characterization, in integrated approaches to testing and assessment (IATA), and in the identification and validation of BoE in epidemiological studies. Nevertheless, several limitations were identified that hinder the optimal usability and acceptance of AOPs by the regulatory community including the lack of quantitative information on response-response relationships and of efficient ways to map chemical data (exposure and toxicity) onto AOPs. The paper summarizes suggestions, ongoing initiatives and third-party tools that may help to overcome these obstacles and thus assure better implementation of AOPs in the NGRA.
Collapse
Affiliation(s)
- Lola Bajard
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, 611 37 Brno, Czech Republic
| | - Ondrej Adamovsky
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, 611 37 Brno, Czech Republic
| | - Karine Audouze
- Université Paris Cité, T3S, Inserm UMR S-1124, F-75006 Paris, France
| | - Kirsten Baken
- Unit Health, Flemish Institute for Technological Research (VITO NV), Boeretang 200, 2400 Mol, Belgium
| | - Robert Barouki
- Université Paris Cité, T3S, Inserm UMR S-1124, F-75006 Paris, France
| | - Joost B Beltman
- Division of Drug Discovery and Safety, Leiden Academic Centre for Drug Research, Leiden University, Leiden, Netherlands
| | - Anna Beronius
- Institute of Environmental Medicine, Karolinska Institutet, Nobels väg 13, Solna, Sweden
| | - Eva Cecilie Bonefeld-Jørgensen
- Centre for Arctic Health & Molecular Epidemiology, Department of Public Health, Aarhus University, Bartholins Allé 2, 8000 Aarhus, Denmark; Greenland Centre for Health Research, University of Greenland, Manutooq 1, 3905 Nuussuaq, Greenland
| | | | - Milo L de Baat
- KWR Water Research Institute, Groningenhaven 7, 3433 PE Nieuwegein, the Netherlands
| | - Filippo Di Tillio
- Division of Drug Discovery and Safety, Leiden Academic Centre for Drug Research, Leiden University, Leiden, Netherlands
| | - Mariana F Fernández
- Center for Biomedical Research (CIBM) & School of Medicine, University of Granada, 18016 Granada, Spain; Instituto de Investigación Biosanitaria (ibs. GRANADA), 18012, Granada, Spain; Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), 28029 Madrid, Spain
| | - Rex E FitzGerald
- Swiss Centre for Applied Human Toxicology SCAHT, University of Basel, Missionsstrasse 64, CH-4055 Basel, Switzerland
| | - Claudia Gundacker
- Institute of Medical Genetics, Center for Pathobiochemistry and Genetics, Medical University of Vienna, 1090 Vienna, Austria
| | - Antonio F Hernández
- Instituto de Investigación Biosanitaria (ibs. GRANADA), 18012, Granada, Spain; Department of Legal Medicine and Toxicology, University of Granada School of Medicine, Avda. de la Investigación, 11, 18016, Granada, Spain; Consortium for Biomedical Research in Epidemiology & Public Health, CIBERESP, Madrid, Spain
| | - Klara Hilscherova
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, 611 37 Brno, Czech Republic
| | - Spyros Karakitsios
- Environmental Engineering Laboratory, Department of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece; HERACLES Research Centre on the Exposome and Health, Center for Interdisciplinary Research and Innovation, Thessaloniki, Greece
| | - Eliska Kuchovska
- IUF-Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225, Duesseldorf, Germany
| | - Manhai Long
- Centre for Arctic Health & Molecular Epidemiology, Department of Public Health, Aarhus University, Bartholins Allé 2, 8000 Aarhus, Denmark
| | - Mirjam Luijten
- National Institute for Public Health and the Environment (RIVM), Centre for Health Protection, Bilthoven, the Netherlands
| | - Sanah Majid
- KWR Water Research Institute, Groningenhaven 7, 3433 PE Nieuwegein, the Netherlands
| | - Philip Marx-Stoelting
- German Federal Institute for Risk Assessment, Dept. Pesticides Safety, Berlin, Germany
| | - Vicente Mustieles
- Center for Biomedical Research (CIBM) & School of Medicine, University of Granada, 18016 Granada, Spain; Instituto de Investigación Biosanitaria (ibs. GRANADA), 18012, Granada, Spain; Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), 28029 Madrid, Spain
| | - Chander K Negi
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, 611 37 Brno, Czech Republic
| | - Dimosthenis Sarigiannis
- Environmental Engineering Laboratory, Department of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece; HERACLES Research Centre on the Exposome and Health, Center for Interdisciplinary Research and Innovation, Thessaloniki, Greece
| | - Stefan Scholz
- UFZ Helmholtz Center for Environmental Research, Dept Bioanalyt Ecotoxicol, D-04318 Leipzig, Germany
| | - Iva Sovadinova
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, 611 37 Brno, Czech Republic
| | - Rob Stierum
- Netherlands Organisation for Applied Scientific Research, Risk Analysis for Products in Development, Utrecht, the Netherlands
| | - Shihori Tanabe
- Division of Risk Assessment, Center for Biological Safety and Research, National Institute of Health Sciences, Kawasaki, Japan
| | - Knut Erik Tollefsen
- Norwegian Institute for Water Research (NIVA), Section of Ecotoxicology and Risk Assessment, Gaustadalléen, Oslo, Norway; Norwegian University of Life Sciences (NMBU), Faculty of Environmental Sciences and Natural Resource Management (MINA), Norway
| | - Annick D van den Brand
- Institute for Public Health and the Environment (RIVM), Centre for Nutrition, Prevention and Health Services, 3720 BA Bilthoven, the Netherlands
| | - Carolina Vogs
- Institute of Environmental Medicine, Karolinska Institutet, Nobels väg 13, Solna, Sweden; Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, SE-75007 Uppsala, Sweden
| | - Maria Wielsøe
- Centre for Arctic Health & Molecular Epidemiology, Department of Public Health, Aarhus University, Bartholins Allé 2, 8000 Aarhus, Denmark
| | | | - Ludek Blaha
- RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, 611 37 Brno, Czech Republic.
| |
Collapse
|
34
|
Schaupp CM, LaLone CA, Blackwell BR, Ankley GT, Villeneuve DL. Leveraging ToxCast data and protein sequence conservation to complement aquatic life criteria derivation. Integr Environ Assess Manag 2023; 19:224-238. [PMID: 35393744 PMCID: PMC10618725 DOI: 10.1002/ieam.4617] [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] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 04/04/2022] [Accepted: 04/05/2022] [Indexed: 06/14/2023]
Abstract
The USEPA's 1985 guidelines for the derivation of aquatic life criteria (ALC) are robust but data-intensive. For many chemicals, the extensive in vivo data sets required for ALC derivation are not available. Thus, alternative analyses and processes that can provide provisional values to guide states, tribes, and other stakeholders while data accumulate and more rigorous criteria are derived would be beneficial. The overarching purpose of this study was to assess the feasibility of using data from new approach methodologies (NAMs) like ToxCast to derive first-pass, provisional values to guide chemical prioritization and resource management as a complement to traditional ALC derivation. To address this goal, the study objectives were to (1) estimate chemical potency using data from NAMs for nine compounds with available aquatic benchmarks, (2) evaluate the utility of using NAM data to elucidate potential mechanisms of toxicity to guide problem formulation, and (3) determine the species relevance of toxicity pathways for compounds with clearly defined mechanisms of action as a means to evaluate whether minimum data requirements could potentially be waived when deriving a more formal ALC. Points of departure were derived from ToxCast data based on the fifth percentile of the distribution of activity concentration above cutoff values falling below the cytotoxic burst. Mechanistic inferences were made based on active target hits in ToxCast and, where applicable, assessed for taxonomic conservation using SeqAPASS. ToxCast-based point-of-departure aligned relatively closely (six of nine test chemicals within a factor of 10; eight of nine within a factor of 100) with aquatic benchmarks from the USEPA and US Department of Energy (DOE). Moreover, pathways of toxicity gleaned from NAM data were reflective of in vivo-based findings from the literature. These results, while preliminary, and based on a limited number of substances, support the potential application of NAM data to complement traditional ALC derivation approaches and prioritization. Integr Environ Assess Manag 2023;19:224-238. © 2022 Society of Environmental Toxicology & Chemistry (SETAC). This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.
Collapse
Affiliation(s)
- Christopher M. Schaupp
- Oak Ridge Institute for Science and Education, USEPA, Great Lakes Toxicology and Ecology Division, Duluth, Minnesota, USA
| | - Carlie A. LaLone
- USEPA, Great Lakes Toxicology and Ecology Division, Duluth, Minnesota, USA
| | - Brett R. Blackwell
- USEPA, Great Lakes Toxicology and Ecology Division, Duluth, Minnesota, USA
| | - Gerald T. Ankley
- USEPA, Great Lakes Toxicology and Ecology Division, Duluth, Minnesota, USA
| | | |
Collapse
|
35
|
Hilton GM, Corvi R, Luijten M, Mehta J, Wolf DC. Towards achieving a modern science-based paradigm for agrochemical carcinogenicity assessment. Regul Toxicol Pharmacol 2022; 137:105301. [PMID: 36436696 DOI: 10.1016/j.yrtph.2022.105301] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/21/2022] [Accepted: 11/21/2022] [Indexed: 11/25/2022]
Abstract
The rodent cancer bioassay has been the standard approach to fulfill regulatory requirements for assessing human carcinogenic potential of agrochemicals, food additives, industrial chemicals, and pharmaceuticals. Decades of research have described the limitations of the rodent cancer bioassay leading to international initiatives to seek alternatives and establish approaches that modernize carcinogenicity assessment. Biologically relevant approaches can provide mechanistic information and increased efficiency for evaluating hazard and risk of chemical carcinogenicity to humans. The application of human-relevant mechanistic understanding to support new approaches to carcinogenicity assessment will be invaluable for regulatory decision-making. The present work outlines the challenges and opportunities that authorities should consider as they come together to build a roadmap that leads to global acceptance and incorporation of fit-for-purpose, scientifically defensible new approaches for human-relevant carcinogenicity assessment of agrochemicals.
Collapse
Affiliation(s)
- Gina M Hilton
- PETA Science Consortium International e.V., Stuttgart, Germany.
| | - Raffaella Corvi
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Mirjam Luijten
- National Institute for Public Health and the Environment, Netherlands
| | - Jyotigna Mehta
- ADAMA Agricultural Solutions Ltd, Reading, United Kingdom
| | | |
Collapse
|
36
|
Terasaka S, Hayashi A, Nukada Y, Yamane M. Investigating the uncertainty of prediction accuracy for the application of physiologically based pharmacokinetic models to animal-free risk assessment of cosmetic ingredients. Regul Toxicol Pharmacol 2022; 135:105262. [PMID: 36103952 DOI: 10.1016/j.yrtph.2022.105262] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 08/17/2022] [Accepted: 09/07/2022] [Indexed: 11/17/2022]
Abstract
Physiologically based pharmacokinetic (PBPK) models are considered useful tools in animal-free risk assessment. To utilize PBPK models for risk assessment, it is necessary to compare their reliability with in vivo data. However, obtaining in vivo pharmacokinetics data for cosmetic ingredients is difficult, complicating the utilization of PBPK models for risk assessment. In this study, to utilize PBPK models for risk assessment without accuracy evaluation, we proposed a novel concept-the modeling uncertainty factor (MUF). By calculating the prediction accuracy for 150 compounds, we established that using in vitro data for metabolism-related parameters and limiting the applicability domain increase the prediction accuracy of a PBPK model. Based on the 97.5th percentile of prediction accuracy, MUF was defined at 10 for the area under the plasma concentration curve and 6 for Cmax. A case study on animal-free risk assessment was conducted for bisphenol A using these MUFs. As this study was conducted mainly on pharmaceuticals, further investigation using cosmetic ingredients is pivotal. However, since internal exposure is essential in realizing animal-free risk assessment, our concept will serve as a useful tool to predict plasma concentrations without using in vivo data.
Collapse
Affiliation(s)
- Shimpei Terasaka
- Kao Corporation, Safety Science Research, 2-1-3, Bunka, Sumida-Ku, Tokyo, 131-8501, Japan.
| | - Akane Hayashi
- Kao Corporation, Safety Science Research, 2-1-3, Bunka, Sumida-Ku, Tokyo, 131-8501, Japan
| | - Yuko Nukada
- Kao Corporation, Safety Science Research, 2-1-3, Bunka, Sumida-Ku, Tokyo, 131-8501, Japan
| | - Masayuki Yamane
- Kao Corporation, Safety Science Research, 2-1-3, Bunka, Sumida-Ku, Tokyo, 131-8501, Japan
| |
Collapse
|
37
|
Macmillan DS, Chilton ML, Gao Y, Kern PS, Schneider SN. How to resolve inconclusive predictions from defined approaches for skin sensitisation in OECD Guideline No. 497. Regul Toxicol Pharmacol 2022; 135:105248. [PMID: 36007801 DOI: 10.1016/j.yrtph.2022.105248] [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] [Received: 07/04/2022] [Revised: 08/02/2022] [Accepted: 08/12/2022] [Indexed: 10/31/2022]
Abstract
In June 2021 the Organisation for Economic Co-operation and Development published Guideline No. 497 on Defined Approaches for Skin Sensitisation (DASS GL). There are two DAs published, known as the 2o3 and the ITS. The 2o3 uses two concordant results from either the DPRA, KeratinoSens™, or the h-CLAT assays to predict hazard (sensitiser/non-sensitiser). The ITS applies a score to results from the DPRA, the h-CLAT and an in silico model to predict United Nations Globally Harmonized System (GHS) sub-categories (1A/1B/Not Classified). The ITS can use Derek Nexus as the in silico model (known as ITSv1) or use OECD QSAR Toolbox (known as ITSv2). As limitations of the individual in chemico/in vitro assays and in silico predictions are carried through to the DAs, inconclusive predictions are possible for chemicals with results in the borderline range, and chemicals with out of domain results. However, these inconclusive predictions can be resolved by applying a weight of evidence approach. Herein, four case studies are presented, each 'inconclusive' for skin sensitisation potential according to both DAs. A weight of evidence approach was applied to each using a robust scientific approach to provide a conclusive prediction, where possible, based on several additional, non-animal lines of evidence.
Collapse
Affiliation(s)
- Donna S Macmillan
- Humane Society International, 1255 23rd St. NW, Suite 450. Washington, DC, 20037, USA.
| | - Martyn L Chilton
- Lhasa Limited, Granary Wharf House, 2 Canal Wharf, Leeds, LS11 5PS, UK
| | - Yuan Gao
- Procter & Gamble Technology (Beijing) Co., Ltd, China
| | - Petra S Kern
- Procter & Gamble Services NV, Temselaan 100, B-1853, Strombeek-Bever, Belgium
| | | |
Collapse
|
38
|
Irizar A, Bender H, Griem P, Natsch A, Vey M, Kimber I. Reference Chemical Potency List (RCPL): A new tool for evaluating the accuracy of skin sensitisation potency measurements by New Approach Methodologies (NAMs). Regul Toxicol Pharmacol 2022; 134:105244. [PMID: 35932886 DOI: 10.1016/j.yrtph.2022.105244] [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] [Received: 04/30/2022] [Revised: 07/21/2022] [Accepted: 07/28/2022] [Indexed: 11/24/2022]
Abstract
Considerable progress has been made in the design of New Approach Methodologies (NAMs) for the hazard identification of skin sensitising chemicals. However, effective risk assessment requires accurate measurement of sensitising potency, and this has proven more difficult to achieve without recourse to animal tests. One important requirement for the development and adoption of novel approaches for this purpose is the availability of reliable databases for determining the accuracy with which sensitising potency can be predicted. Some previous approaches have relied on comparisons with potency estimates based on either human or animal (local lymph node assay) data. In contrast, we here describe the development of a carefully curated Reference Chemical Potency List (RCPL) which is based on consideration of the best available human and animal data. The RCPL is comprised of 33 readily available chemicals that span a wide range of chemistry and sensitising potency, and contain examples of both direct and indirect (pre- and pro-) haptens. For each chemical a potency value (PV) was derived, and chemicals ranked according to PV without the use of potency categories. It is proposed that the RCPL provides an effective resource for assessment of the accuracy with which NAMs can measure skin sensitising potency.
Collapse
Affiliation(s)
- Amaia Irizar
- The International Fragrance Association (IFRA), Switzerland.
| | | | | | | | - Matthias Vey
- The International Fragrance Association (IFRA), Switzerland
| | - Ian Kimber
- Faculty of Biology, Medicine and Health, University of Manchester, UK
| |
Collapse
|
39
|
Reynolds J, Gilmour N, Baltazar MT, Reynolds G, Windebank S, Maxwell G. Decision making in next generation risk assessment for skin allergy: Using historical clinical experience to benchmark risk. Regul Toxicol Pharmacol 2022;:105219. [PMID: 35835397 DOI: 10.1016/j.yrtph.2022.105219] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 05/24/2022] [Accepted: 06/30/2022] [Indexed: 11/23/2022]
Abstract
Our aim is to develop and apply next generation approaches to skin allergy risk assessment that do not require new animal test data and better quantify uncertainties. Quantitative risk assessment for skin sensitisation uses safety assessment factors to extrapolate from the point-of-departure to an acceptable human exposure level. It is currently unclear whether these safety assessment factors are appropriate when using non-animal test data to derive a point-of departure. Our skin allergy risk assessment model Defined Approach uses Bayesian statistics to infer a human-relevant metric of sensitiser potency with explicit quantification of uncertainty, using any combination of human repeat insult patch test, local lymph node assay, direct peptide reactivity assay, KeratinoSens™, h-CLAT or U-SENS™ data. Here we describe the incorporation of benchmark exposures pertaining to use of consumer products with clinical data supporting a high/low risk categorisation for skin sensitisation. Margins-of-exposure (potency estimate to consumer exposure level ratio) are regressed against the benchmark risk classifications, enabling derivation of a risk metric defined as the probability that an exposure is low risk. This approach circumvents the use of safety assessment factors and provides a simple and transparent mechanism whereby clinical experience can directly feed-back into risk assessment decisions.
Collapse
|
40
|
de Bruijn VMP, Wang Z, Bakker W, Zheng W, Spee B, Bouwmeester H. Hepatic bile acid synthesis and secretion: Comparison of in vitro methods. Toxicol Lett 2022; 365:46-60. [PMID: 35724847 DOI: 10.1016/j.toxlet.2022.06.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 03/15/2022] [Revised: 05/30/2022] [Accepted: 06/09/2022] [Indexed: 12/12/2022]
Abstract
Reliable hepatic in vitro systems are crucial for the safety assessment of xenobiotics. Certain xenobiotics decrease the hepatic bile efflux, which can ultimately result in cholestasis. Preclinical animal models and the currently available in vitro systems poorly predict a xenobiotic's cholestatic potential. Here, we compared the phenotype and capacity of three liver derived in vitro systems to emulate human functionality to synthesize and secrete bile acids (BAs). To this end, basal BA production of sandwich cultured human hepatocytes (SCHHs), HepaRG cells (HepaRGs) and hepatocyte-like intrahepatic cholangiocyte organoids (ICO-heps) were analysed, and the effect of the known BSEP (Bile Salt Export Pump)-inhibitors bosentan and lopinavir on BA disposition in SCHHs and HepaRGs was quantified. RT-qPCR of selected target genes involved in maturation status, synthesis, transport and conjugation of BAs was performed to mechanistically underpin the observed differences in BA homeostasis. ICO-heps produced a (very) low amount of BAs. SCHHs are a powerful tool in cholestasis-testing due to their high basal BA production and high transporter expression compared to the other models tested. HepaRGs were responsive to both selected BSEP-inhibitors and produced a BA profile that is most similar to the human in vivo situation, making them a suitable and practical candidate for cholestasis-testing.
Collapse
Affiliation(s)
| | - Zhenguo Wang
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, the Netherlands; Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - Wouter Bakker
- Division of Toxicology, Wageningen University & Research, the Netherlands
| | - Weijia Zheng
- Division of Toxicology, Wageningen University & Research, the Netherlands
| | - Bart Spee
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - Hans Bouwmeester
- Division of Toxicology, Wageningen University & Research, the Netherlands
| |
Collapse
|
41
|
Klose J, Li L, Pahl M, Bendt F, Hübenthal U, Jüngst C, Petzsch P, Schauss A, Köhrer K, Leung PC, Wang CC, Koch K, Tigges J, Fan X, Fritsche E. Application of the adverse outcome pathway concept for investigating developmental neurotoxicity potential of Chinese herbal medicines by using human neural progenitor cells in vitro. Cell Biol Toxicol 2022. [PMID: 35701726 DOI: 10.1007/s10565-022-09730-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 05/10/2022] [Indexed: 12/16/2022]
Abstract
Adverse outcome pathways (AOPs) are organized sequences of key events (KEs) that are triggered by a xenobiotic-induced molecular initiating event (MIE) and summit in an adverse outcome (AO) relevant to human or ecological health. The AOP framework causally connects toxicological mechanistic information with apical endpoints for application in regulatory sciences. AOPs are very useful to link endophenotypic, cellular endpoints in vitro to adverse health effects in vivo. In the field of in vitro developmental neurotoxicity (DNT), such cellular endpoints can be assessed using the human "Neurosphere Assay," which depicts different endophenotypes for a broad variety of neurodevelopmental KEs. Combining this model with large-scale transcriptomics, we evaluated DNT hazards of two selected Chinese herbal medicines (CHMs) Lei Gong Teng (LGT) and Tian Ma (TM), and provided further insight into their modes-of-action (MoA). LGT disrupted hNPC migration eliciting an exceptional migration endophenotype. Time-lapse microscopy and intervention studies indicated that LGT disturbs laminin-dependent cell adhesion. TM impaired oligodendrocyte differentiation in human but not rat NPCs and activated a gene expression network related to oxidative stress. The LGT results supported a previously published AOP on radial glia cell adhesion due to interference with integrin-laminin binding, while the results of TM exposure were incorporated into a novel putative, stressor-based AOP. This study demonstrates that the combination of phenotypic and transcriptomic analyses is a powerful tool to elucidate compounds' MoA and incorporate the results into novel or existing AOPs for a better perception of the DNT hazard in a regulatory context.
Collapse
|
42
|
Ceger P, Garcia-Reyero Vinas N, Allen D, Arnold E, Bloom R, Brennan JC, Clarke C, Eisenreich K, Fay K, Hamm J, Henry PFP, Horak K, Hunter W, Judkins D, Klein P, Kleinstreuer N, Koehrn K, LaLone CA, Laurenson JP, Leet JK, Lowit A, Lynn SG, Norberg-King T, Perkins EJ, Petersen EJ, Rattner BA, Sprankle CS, Steeger T, Warren JE, Winfield S, Odenkirchen E. Current ecotoxicity testing needs among selected U.S. federal agencies. Regul Toxicol Pharmacol 2022; 133:105195. [PMID: 35660046 PMCID: PMC9623878 DOI: 10.1016/j.yrtph.2022.105195] [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] [Received: 11/12/2021] [Revised: 05/19/2022] [Accepted: 05/25/2022] [Indexed: 10/18/2022]
Abstract
U.S. regulatory and research agencies use ecotoxicity test data to assess the hazards associated with substances that may be released into the environment, including but not limited to industrial chemicals, pharmaceuticals, pesticides, food additives, and color additives. These data are used to conduct hazard assessments and evaluate potential risks to aquatic life (e.g., invertebrates, fish), birds, wildlife species, or the environment. To identify opportunities for regulatory uses of non-animal replacements for ecotoxicity tests, the needs and uses for data from tests utilizing animals must first be clarified. Accordingly, the objective of this review was to identify the ecotoxicity test data relied upon by U.S. federal agencies. The standards, test guidelines, guidance documents, and/or endpoints that are used to address each of the agencies' regulatory and research needs regarding ecotoxicity testing are described in the context of their application to decision-making. Testing and information use, needs, and/or requirements relevant to the regulatory or programmatic mandates of the agencies taking part in the Interagency Coordinating Committee on the Validation of Alternative Methods Ecotoxicology Workgroup are captured. This information will be useful for coordinating efforts to develop and implement alternative test methods to reduce, refine, or replace animal use in chemical safety evaluations.
Collapse
Affiliation(s)
- Patricia Ceger
- Integrated Laboratory Systems, LLC, P.O. Box 13501, Research Triangle Park, NC, 27709, USA.
| | | | - David Allen
- Integrated Laboratory Systems, LLC, P.O. Box 13501, Research Triangle Park, NC, 27709, USA.
| | - Elyssa Arnold
- U.S. Environmental Protection Agency, Office of Pesticide Programs, MC7507P, 1200 Pennsylvania Avenue NW, Washington, DC, 20460, USA.
| | - Raanan Bloom
- U.S. Food and Drug Administration, Center for Drug Evaluation and Research, 10903 New Hampshire Avenue, Silver Spring, MD, 20993, USA.
| | - Jennifer C Brennan
- U.S. Environmental Protection Agency, Office of Pollution Prevention and Toxics, 7401M, 1200 Pennsylvania Avenue NW, Washington, DC, 20460, USA.
| | - Carol Clarke
- U.S. Department of Agriculture, 1400 Independence Ave. SW, Washington, DC, 20250, USA.
| | - Karen Eisenreich
- U.S. Environmental Protection Agency, Office of Pollution Prevention and Toxics, 7401M, 1200 Pennsylvania Avenue NW, Washington, DC, 20460, USA.
| | - Kellie Fay
- U.S. Environmental Protection Agency, Office of Pollution Prevention and Toxics, 7401M, 1200 Pennsylvania Avenue NW, Washington, DC, 20460, USA.
| | - Jonathan Hamm
- Integrated Laboratory Systems, LLC, P.O. Box 13501, Research Triangle Park, NC, 27709, USA.
| | - Paula F P Henry
- U.S. Geological Survey, Eastern Ecological Science Center, 12100 Beech Forest Rd, Laurel, MD, 20708, USA.
| | - Katherine Horak
- U.S. Department of Agriculture, Wildlife Services National Wildlife Research Center, 4101 LaPorte Ave. Fort Collins, CO, 80521, USA.
| | - Wesley Hunter
- U.S. Food and Drug Administration, Center for Veterinary Medicine, HFV-161, 7500 Standish Place, Rockville, MD, 20855, USA.
| | - Donna Judkins
- U.S. Environmental Protection Agency, Office of Pesticide Programs, MC7507P, 1200 Pennsylvania Avenue NW, Washington, DC, 20460, USA.
| | - Patrice Klein
- U.S. Department of Agriculture, 1400 Independence Ave. SW, Washington, DC, 20250, USA.
| | - Nicole Kleinstreuer
- National Institute of Environmental Health Sciences, National Toxicology Program Interagency Center for the Evaluation of Alternative Toxicological Methods, P.O. Box 12233, Research Triangle Park, NC, 27709, USA.
| | - Kara Koehrn
- U.S. Environmental Protection Agency, Office of Pollution Prevention and Toxics, 7401M, 1200 Pennsylvania Avenue NW, Washington, DC, 20460, USA.
| | - Carlie A LaLone
- U.S. Environmental Protection Agency, Office of Research and Development, 8101R, 6201 Congdon Blvd., Duluth, MN, 55804, USA.
| | - James P Laurenson
- U.S. Food and Drug Administration, Center for Drug Evaluation and Research, 10903 New Hampshire Avenue, Silver Spring, MD, 20993, USA.
| | - Jessica K Leet
- U.S. Geological Survey, Columbia Environmental Research Center (CERC), Columbia, MO, 65201, USA.
| | - Anna Lowit
- U.S. Environmental Protection Agency, Office of Pesticide Programs, MC7507P, 1200 Pennsylvania Avenue NW, Washington, DC, 20460, USA.
| | - Scott G Lynn
- U.S. Environmental Protection Agency, Office of Pesticide Programs, MC7507P, 1200 Pennsylvania Avenue NW, Washington, DC, 20460, USA.
| | - Teresa Norberg-King
- U.S. Environmental Protection Agency, Office of Research and Development, 8101R, 6201 Congdon Blvd., Duluth, MN, 55804, USA.
| | - Edward J Perkins
- U.S. Army Engineer Research and Development Center, 3909 Halls Ferry Rd., Vicksburg, MS, 39180, USA.
| | - Elijah J Petersen
- U.S. Department of Commerce, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, 2089, USA.
| | - Barnett A Rattner
- U.S. Geological Survey, Eastern Ecological Science Center, 10300 Baltimore Ave, BARC-EAST Bldg. 308, Beltsville, MD, 20705, USA.
| | - Catherine S Sprankle
- Integrated Laboratory Systems, LLC, P.O. Box 13501, Research Triangle Park, NC, 27709, USA.
| | - Thomas Steeger
- U.S. Environmental Protection Agency, Office of Pesticide Programs, MC7507P, 1200 Pennsylvania Avenue NW, Washington, DC, 20460, USA.
| | - Jim E Warren
- U.S. Department of Agriculture, 1400 Independence Ave. SW, Washington, DC, 20250, USA.
| | - Sarah Winfield
- U.S. Food and Drug Administration, Center for Food Safety and Applied Nutrition, 5001 Campus Drive, HFS-009, College Park, MD, 20740, USA.
| | - Edward Odenkirchen
- U.S. Environmental Protection Agency, Office of Pesticide Programs, MC7507P, 1200 Pennsylvania Avenue NW, Washington, DC, 20460, USA.
| |
Collapse
|
43
|
Olker JH, Elonen CM, Pilli A, Anderson A, Kinziger B, Erickson S, Skopinski M, Pomplun A, LaLone CA, Russom CL, Hoff D. The ECOTOXicology Knowledgebase: A Curated Database of Ecologically Relevant Toxicity Tests to Support Environmental Research and Risk Assessment. Environ Toxicol Chem 2022; 41:1520-1539. [PMID: 35262228 PMCID: PMC9408435 DOI: 10.1002/etc.5324] [Citation(s) in RCA: 51] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/25/2021] [Accepted: 02/28/2022] [Indexed: 05/19/2023]
Abstract
The need for assembled existing and new toxicity data has accelerated as the amount of chemicals introduced into commerce continues to grow and regulatory mandates require safety assessments for a greater number of chemicals. To address this evolving need, the ECOTOXicology Knowledgebase (ECOTOX) was developed starting in the 1980s and is currently the world's largest compilation of curated ecotoxicity data, providing support for assessments of chemical safety and ecological research through systematic and transparent literature review procedures. The recently released version of ECOTOX (Ver 5, www.epa.gov/ecotox) provides single-chemical ecotoxicity data for over 12,000 chemicals and ecological species with over one million test results from over 50,000 references. Presented is an overview of ECOTOX, detailing the literature review and data curation processes within the context of current systematic review practices and discussing how recent updates improve the accessibility and reusability of data to support the assessment, management, and research of environmental chemicals. Relevant and acceptable toxicity results are identified from studies in the scientific literature, with pertinent methodological details and results extracted following well-established controlled vocabularies and newly extracted toxicity data added quarterly to the public website. Release of ECOTOX, Ver 5, included an entirely redesigned user interface with enhanced data queries and retrieval options, visualizations to aid in data exploration, customizable outputs for export and use in external applications, and interoperability with chemical and toxicity databases and tools. This is a reliable source of curated ecological toxicity data for chemical assessments and research and continues to evolve with accessible and transparent state-of-the-art practices in literature data curation and increased interoperability to other relevant resources. Environ Toxicol Chem 2022;41:1520-1539. © 2022 SETAC. This article has been contributed to by US Government employees and their work is in the public domain in the USA.
Collapse
Affiliation(s)
- Jennifer H. Olker
- US Environmental Protection Agency, Office of Research and Development, Center for Computational Toxicology and Exposure, Great Lakes Toxicology and Ecology Division, 6201 Congdon Blvd., Duluth, MN 55804, USA
- Corresponding author: USEPA, 6201 Congdon Blvd, Duluth, MN 55804 USA, . Tel: 218-529-5119
| | - Colleen M. Elonen
- US Environmental Protection Agency, Office of Research and Development, Center for Computational Toxicology and Exposure, Great Lakes Toxicology and Ecology Division, 6201 Congdon Blvd., Duluth, MN 55804, USA
| | - Anne Pilli
- General Dynamics Information Technology, 6201 Congdon Blvd., Duluth, MN 55804, USA
| | - Arne Anderson
- General Dynamics Information Technology, 6201 Congdon Blvd., Duluth, MN 55804, USA
| | - Brian Kinziger
- General Dynamics Information Technology, 6201 Congdon Blvd., Duluth, MN 55804, USA
| | - Stephen Erickson
- General Dynamics Information Technology, 6201 Congdon Blvd., Duluth, MN 55804, USA
| | - Michael Skopinski
- General Dynamics Information Technology, 6201 Congdon Blvd., Duluth, MN 55804, USA
| | - Anita Pomplun
- General Dynamics Information Technology, 6201 Congdon Blvd., Duluth, MN 55804, USA
| | - Carlie A. LaLone
- US Environmental Protection Agency, Office of Research and Development, Center for Computational Toxicology and Exposure, Great Lakes Toxicology and Ecology Division, 6201 Congdon Blvd., Duluth, MN 55804, USA
| | - Christine L. Russom
- US Environmental Protection Agency, Office of Research and Development, Center for Computational Toxicology and Exposure, Great Lakes Toxicology and Ecology Division, 6201 Congdon Blvd., Duluth, MN 55804, USA
| | - Dale Hoff
- US Environmental Protection Agency, Office of Research and Development, Center for Computational Toxicology and Exposure, Great Lakes Toxicology and Ecology Division, 6201 Congdon Blvd., Duluth, MN 55804, USA
| |
Collapse
|
44
|
Hoffmann S, Alépée N, Gilmour N, Kern PS, van Vliet E, Boislève F, Bury D, Cloudet E, Klaric M, Kühnl J, Lalko JF, Mewes K, Miyazawa M, Nishida H, Tam Brami MT, Varçin M, Api AM, Europe C. Expansion of the Cosmetics Europe skin sensitisation database with new substances and PPRA data. Regul Toxicol Pharmacol 2022;:105169. [PMID: 35447229 DOI: 10.1016/j.yrtph.2022.105169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 04/13/2022] [Indexed: 11/21/2022]
Abstract
The assessment of skin sensitisation is a key requirement in all regulated sectors, with the European Union's regulation of cosmetic ingredients being most challenging, since it requires quantitative skin sensitisation assessment based on new approach methodologies (NAMs). To address this challenge, an in-depth and harmonised understanding of NAMs is fundamental to inform the assessment. Therefore, we compiled a database of NAMs, and in vivo (human and local lymph node assay) reference data. Here, we expanded this database with 41 substances highly relevant for cosmetic industry. These structurally different substances were tested in six NAMs (Direct Peptide Reactivity Assay, KeratinoSens™, human Cell Line Activation Test, U-SENS™, SENS-IS, Peroxidase Peptide Reactivity Assay). Our analysis revealed that the substances could be tested without technical limitations, but were generally overpredicted when compared to reference results. Reasons for this reduced predictivity were explored through pairwise NAM comparisons and association of overprediction with hydrophobicity. We conclude that more detailed understanding of how NAMs apply to a wider range of substances is needed. This would support a flexible and informed choice of NAMs to be optimally applied in the context of a next generation risk assessment framework, ultimately contributing to the characterisation and reduction of uncertainty.
Collapse
|
45
|
Sørli JB, Sengupta S, Jensen ACØ, Nikiforov V, Clausen PA, Hougaard KS, Højriis S, Frederiksen M, Hadrup N. Risk assessment of consumer spray products using in vitro lung surfactant function inhibition, exposure modelling and chemical analysis. Food Chem Toxicol 2022; 164:112999. [PMID: 35427705 DOI: 10.1016/j.fct.2022.112999] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 11/23/2021] [Revised: 03/14/2022] [Accepted: 04/05/2022] [Indexed: 11/26/2022]
Abstract
Consumer spray products release aerosols that can potentially be inhaled and reach the deep parts of the lungs. A thin layer of liquid, containing a mixture of proteins and lipids known as lung surfactant, coats the alveoli. Inhibition of lung surfactant function can lead to acute loss of lung function. We focused on two groups of spray products; 8 cleaning and 13 impregnation products, and in the context of risk assessment, used an in vitro method for assessing inhibition of lung surfactant function. Original spray-cans were used to generate aerosols to measure aerodynamic particle size distribution. We recreated a real-life exposure scenario to estimate the alveolar deposited dose. Most impregnation products inhibited lung surfactant function at the lowest aerosolization rate, whereas only two cleaning products inhibited function at the highest rates. We used inhibitory dose and estimated alveolar deposition to calculate the margin of safety (MoS). The MoS for the inhibitory products was ≤1 for the impregnation products, while much larger for the cleaning products (>880). This risk assessment focused on the risk of lung surfactant function disruption and provides knowledge on an endpoint of lung toxicity that is not investigated by the currently available OECD test guidelines.
Collapse
Affiliation(s)
- J B Sørli
- National Research Centre for the Working Environment (NFA), 105 Lersø Parkallé, Copenhagen Ø, Denmark.
| | - S Sengupta
- National Research Centre for the Working Environment (NFA), 105 Lersø Parkallé, Copenhagen Ø, Denmark.
| | - A C Ø Jensen
- National Research Centre for the Working Environment (NFA), 105 Lersø Parkallé, Copenhagen Ø, Denmark.
| | - V Nikiforov
- Norwegian Institute for Air Research (NILU), Tromsø, Norway.
| | - P A Clausen
- National Research Centre for the Working Environment (NFA), 105 Lersø Parkallé, Copenhagen Ø, Denmark.
| | - K S Hougaard
- National Research Centre for the Working Environment (NFA), 105 Lersø Parkallé, Copenhagen Ø, Denmark; Department of Public Health, University of Copenhagen, Copenhagen, Denmark.
| | - Sara Højriis
- COWI, Parallelvej 2, Kgs, Lyngby, Denmark; DHI A/S, Agern Allé 5, Hørsholm, Denmark.
| | - M Frederiksen
- National Research Centre for the Working Environment (NFA), 105 Lersø Parkallé, Copenhagen Ø, Denmark.
| | - N Hadrup
- National Research Centre for the Working Environment (NFA), 105 Lersø Parkallé, Copenhagen Ø, Denmark.
| |
Collapse
|
46
|
Firman JW, Cronin MTD, Rowe PH, Semenova E, Doe JE. The use of Bayesian methodology in the development and validation of a tiered assessment approach towards prediction of rat acute oral toxicity. Arch Toxicol 2022. [PMID: 35034154 DOI: 10.1007/s00204-021-03205-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 12/09/2021] [Indexed: 11/16/2022]
Abstract
There exists consensus that the traditional means by which safety of chemicals is assessed—namely through reliance upon apical outcomes obtained following in vivo testing—is increasingly unfit for purpose. Whilst efforts in development of suitable alternatives continue, few have achieved levels of robustness required for regulatory acceptance. An array of “new approach methodologies” (NAM) for determining toxic effect, spanning in vitro and in silico spheres, have by now emerged. It has been suggested, intuitively, that combining data obtained from across these sources might serve to enhance overall confidence in derived judgment. This concept may be formalised in the “tiered assessment” approach, whereby evidence gathered through a sequential NAM testing strategy is exploited so to infer the properties of a compound of interest. Our intention has been to provide an illustration of how such a scheme might be developed and applied within a practical setting—adopting for this purpose the endpoint of rat acute oral lethality. Bayesian statistical inference is drawn upon to enable quantification of degree of confidence that a substance might ultimately belong to one of five LD50-associated toxicity categories. Informing this is evidence acquired both from existing in silico and in vitro resources, alongside a purposely-constructed random forest model and structural alert set. Results indicate that the combination of in silico methodologies provides moderately conservative estimations of hazard, conducive for application in safety assessment, and for which levels of certainty are defined. Accordingly, scope for potential extension of approach to further toxicological endpoints is demonstrated.
Collapse
|
47
|
Black MB, Stern A, Efremenko A, Mallick P, Moreau M, Hartman JK, McMullen PD. Biological system considerations for application of toxicogenomics in next-generation risk assessment and predictive toxicology. Toxicol In Vitro 2022; 80:105311. [PMID: 35038564 DOI: 10.1016/j.tiv.2022.105311] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 01/30/2021] [Revised: 12/17/2021] [Accepted: 01/10/2022] [Indexed: 10/19/2022]
Abstract
There is increasing interest in using modern 'omics technologies, such as whole transcriptome sequencing, to inform decisions about human health safety and chemical toxicity hazard. High throughput methodologies using in vitro assays offer a path forward in reducing or eliminating animal testing. However, many aspects of these technologies need assessment before they will gain the trust of regulators and the public as viable alternative test methods for human health and safety. We used a high throughput whole transcriptome sequence assay (TempO-Seq) to assess the use of three widely used cancer cell lines (HepG2, MCF7, and Ishikawa cells) as in vitro systems for determination of cellular modes of action for two well studied compounds with canonical liver responses: ketoconazole and phenobarbital. We evaluated transcriptomic data to infer points of departure for use in risk analyses of compounds. Both compounds displayed shortcomings in evidence for canonical liver-related responses in any cell line, despite a strong dose response in all three. This raises questions about the competence of simple, mono-cultured cancer cell lines as appropriate surrogates for some adverse effects or toxic endpoints. Points of departure derived from benchmark doses were highly consistent across all three cell lines however, indicating the use of transcriptomic BMD analyses for such purposes would be a reliable and consistent approach.
Collapse
Affiliation(s)
- Michael B Black
- ScitoVation, 100 Capitola Drive, Suite 106, Durham, NC 27713, United States of America.
| | - Allysa Stern
- ScitoVation, 100 Capitola Drive, Suite 106, Durham, NC 27713, United States of America; Cell Microsystems, 801 Capitola Dr., Suite 10, Durham, NC 27713, United States of America
| | - Alina Efremenko
- ScitoVation, 100 Capitola Drive, Suite 106, Durham, NC 27713, United States of America
| | - Pankajini Mallick
- ScitoVation, 100 Capitola Drive, Suite 106, Durham, NC 27713, United States of America
| | - Marjory Moreau
- ScitoVation, 100 Capitola Drive, Suite 106, Durham, NC 27713, United States of America
| | - Jessica K Hartman
- ScitoVation, 100 Capitola Drive, Suite 106, Durham, NC 27713, United States of America; Cell Microsystems, 801 Capitola Dr., Suite 10, Durham, NC 27713, United States of America
| | - Patrick D McMullen
- ScitoVation, 100 Capitola Drive, Suite 106, Durham, NC 27713, United States of America
| |
Collapse
|
48
|
Fang J, Dong S, Boogaard PJ, Rietjens IMCM, Kamelia L. Developmental toxicity testing of unsubstituted and methylated 4- and 5-ring polycyclic aromatic hydrocarbons using the zebrafish embryotoxicity test. Toxicol In Vitro 2022; 80:105312. [PMID: 35033653 DOI: 10.1016/j.tiv.2022.105312] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 08/31/2021] [Revised: 12/20/2021] [Accepted: 01/10/2022] [Indexed: 01/29/2023]
Abstract
The present study evaluates the in vitro developmental toxicity of 4- and 5-ring PAHs including benz[a]anthracene and benzo[a]pyrene and six of their monomethylated congeners, and dibenz[a,h]anthracene using the zebrafish embryotoxicity test (ZET). In general, the tested PAHs induced various developmental effects in the zebrafish embryos including unhatched embryos, no movement and circulation, yolk sac and pericardial edemas, deformed body shape, and cumulative mortality at 96 h post fertilization (hpf). The alkyl substituent on different positions of the aromatic ring of the PAHs appeared to change their in vitro developmental toxicity. Comparison to a previously reported molecular docking study showed that the methyl substituents may affect the interaction of the PAHs with the aryl hydrocarbon receptor (AhR) which is known to play a role in the developmental toxicity of some PAHs. Taken together, our results show that methylation can either increase or decrease the developmental toxicity of PAHs and suggest this may relate to effects on the molecular dimensions and resulting consequences for interactions with the AhR.
Collapse
Affiliation(s)
- Jing Fang
- Division of Toxicology, Wageningen University and Research, 6708, WE, Wageningen, the Netherlands.
| | - Shutong Dong
- Division of Toxicology, Wageningen University and Research, 6708, WE, Wageningen, the Netherlands
| | - Peter J Boogaard
- Division of Toxicology, Wageningen University and Research, 6708, WE, Wageningen, the Netherlands
| | - Ivonne M C M Rietjens
- Division of Toxicology, Wageningen University and Research, 6708, WE, Wageningen, the Netherlands
| | - Lenny Kamelia
- Shell Health, Shell International B.V., 2596, HR, The Hague, the Netherlands
| |
Collapse
|
49
|
Mitchell CA, Dever JT, Gafner S, Griffiths JC, Marsman DS, Rider C, Welch C, Embry MR. The Botanical Safety Consortium: A public-private partnership to enhance the botanical safety toolkit. Regul Toxicol Pharmacol 2021; 128:105090. [PMID: 34863907 DOI: 10.1016/j.yrtph.2021.105090] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 11/16/2021] [Accepted: 11/29/2021] [Indexed: 12/31/2022]
Abstract
Botanical dietary supplement use is widespread and growing, therefore, ensuring the safety of botanical products is a public health priority. This commentary describes the mission and objectives of the Botanical Safety Consortium (BSC) - a public-private partnership aimed at enhancing the toolkit for conducting the safety evaluation of botanicals. This partnership is the result of a Memorandum of Understanding between the US FDA, the National Institute of Environmental Health Sciences, and the Health and Environmental Sciences Institute. The BSC serves as a global forum for scientists from government, academia, consumer health groups, industry, and non-profit organizations to work collaboratively on adapting and integrating new approach methodologies (NAMs) into routine botanical safety assessments. The objectives of the BSC are to: 1) engage with a group of global stakeholders to leverage scientific safety approaches; 2) establish appropriate levels of chemical characterization for botanicals as complex mixtures; 3) identify pragmatic, fit-for-purpose NAMs to evaluate botanical safety; 4) evaluate the application of these tools via comparison to the currently available safety information on selected botanicals; 5) and integrate these tools into a framework that can facilitate the evaluation of botanicals. Initially, the BSC is focused on oral exposure from dietary supplements, but this scope could be expanded in future phases of work. This commentary provides an overview of the structure, goals, and strategies of this initiative and insights regarding our first objectives, namely the selection and prioritization of botanicals based on putative toxicological properties.
Collapse
Affiliation(s)
| | | | | | | | | | - Cynthia Rider
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Cara Welch
- US Food and Drug Administration, Silver Spring, MD, USA
| | - Michelle R Embry
- Health and Environmental Sciences Institute, Washington, DC, USA
| |
Collapse
|
50
|
Reynolds G, Reynolds J, Gilmour N, Cubberley R, Spriggs S, Aptula A, Przybylak K, Windebank S, Maxwell G, Baltazar MT. A hypothetical skin sensitisation next generation risk assessment for coumarin in cosmetic products. Regul Toxicol Pharmacol 2021; 127:105075. [PMID: 34728330 DOI: 10.1016/j.yrtph.2021.105075] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 10/04/2021] [Accepted: 10/27/2021] [Indexed: 11/21/2022]
Abstract
Next generation Risk Assessment (NGRA) is an exposure-led, hypothesis-driven approach which integrates new approach methodologies (NAMs) to assure safety without generating animal data. This hypothetical skin allergy risk assessment of two consumer products - face cream containing 0.1% coumarin and deodorant containing 1% coumarin - demonstrates the application of our skin allergy NGRA framework which incorporates our Skin Allergy Risk Assessment (SARA) Model. SARA uses Bayesian statistics to provide a human relevant point of departure and risk metric for a given chemical exposure based upon input data that can include both NAMs and historical in vivo studies. Regardless of whether NAM or in vivo inputs were used, the model predicted that the face cream and deodorant exposures were low and high risk respectively. Using only NAM data resulted in a minor underestimation of risk relative to in vivo. Coumarin is a predicted pro-hapten and consequently, when applying this mechanistic understanding to the selection of NAMs the discordance in relative risk could be minimized. This case study demonstrates how integrating a computational model and generating bespoke NAM data in a weight of evidence framework can build confidence in safety decision making.
Collapse
|