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Rogers CA, Gaskin SE, Thredgold LD, Pukala TL. An approach to quantify ortho-phthalaldehyde contamination on work surfaces. Ann Work Expo Health 2023; 67:886-894. [PMID: 37436000 PMCID: PMC10410490 DOI: 10.1093/annweh/wxad039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 05/23/2023] [Accepted: 06/26/2023] [Indexed: 07/13/2023] Open
Abstract
Ortho-phthalaldehyde (OPA) is used as a high-level disinfectant for reusable medical devices in healthcare settings. The ACGIH recently adopted a Threshold Limit Value-Surface Limit (TLV-SL; 25 µg/100 cm2) for OPA surface contamination to prevent induction of dermal and respiratory sensitization following dermal exposure. However, there is no current validated method to measure OPA surface contamination. This study aimed to develop a standardized approach for sample collection and quantitative determination of OPA from work surfaces for use in risk assessment practices. The reported method utilises readily available commercial wipes to collect surface samples coupled with direct detection of OPA via liquid chromatography time of flight mass spectrometry (LC-ToF-MS). This approach avoided complex derivatization steps commonly required for the analysis of aldehydes. Method evaluation was conducted in accordance with the Occupational Safety and Health Administration (OSHA) surface sampling guidelines. Overall recoveries of 25 µg/100 cm2 of OPA from stainless steel and glass surfaces were 70% and 72%, respectively. The reported LOD for this method was 1.1 µg/sample and the LOQ was 3.7 µg/sample. OPA remained stable on the sampling medium for up to 10 days, when stored at 4 °C. The method was demonstrated in a workplace surface assessment at a local hospital sterilising unit, successfully detecting OPA on work surfaces. This method is intended to supplement airborne exposure assessment and provide a quantitative assessment tool for potential dermal exposure. When used in conjunction with a thorough occupational hygiene program that includes hazard communication, engineering controls, and personal protective equipment, skin exposure and consequent sensitization risks in the workplace can be minimized.
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Affiliation(s)
- Caitlyn A Rogers
- Adelaide Exposure Science and Health, School of Public Health, University of Adelaide, Adelaide, South Australia, 5005, Australia
| | - Sharyn E Gaskin
- Adelaide Exposure Science and Health, School of Public Health, University of Adelaide, Adelaide, South Australia, 5005, Australia
| | - Leigh D Thredgold
- Adelaide Exposure Science and Health, School of Public Health, University of Adelaide, Adelaide, South Australia, 5005, Australia
| | - Tara L Pukala
- Department of Chemistry, School of Physical Sciences, University of Adelaide, Adelaide, South Australia, 5005, Australia
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Parris P, Whelan G, Burild A, Whritenour J, Bruen U, Bercu J, Callis C, Graham J, Johann E, Griffin T, Kohan M, Martin EA, Masuda-Herrera M, Stanard B, Tien E, Cruz M, Nagao L. Framework for sensitization assessment of extractables and leachables in pharmaceuticals. Crit Rev Toxicol 2022; 52:125-138. [PMID: 35703156 DOI: 10.1080/10408444.2022.2065966] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
During the toxicological assessment of extractables and leachables in drug products, localized hazards such as irritation or sensitization may be identified. Typically, because of the low concentration at which leachables occur in pharmaceuticals, irritation is of minimal concern; therefore, this manuscript focuses on sensitization potential. The primary objective of performing a leachable sensitization assessment is protection against Type IV induction of sensitization, rather than prevention of an elicitation response, as it is not possible to account for the immunological state of every individual. Sensitizers have a wide range of potencies and those which induce sensitization upon exposure at a low concentration (i.e. strong, or extreme sensitizers) pose the highest risk to patients and should be the focus of the risk assessment. The Extractables and Leachables Safety Information Exchange (ELSIE) consortium has reviewed the status of dermal, respiratory, and systemic risk assessment in cosmetic and pharmaceutical industries, and proposes a framework to evaluate the safety of known or potential dermal sensitizers in pharmaceuticals. Due to the lack of specific regulatory guidance on this topic, the science-driven risk-based approach proposed by ELSIE encourages consistency in the toxicological assessment of extractables and leachables to maintain high product quality and ensure patient safety.
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Affiliation(s)
- Patricia Parris
- Pfizer Worldwide Research, Development and Medical, Kent, UK
| | | | - Anders Burild
- Novo Nordisk A/S, Safety Sciences, Imaging and Data Management, Måløv, Denmark
| | | | - Uma Bruen
- Organon USA Inc., Jersey City, NJ, USA
| | - Joel Bercu
- Gilead Sciences Inc., Foster City, CA, USA
| | - Courtney Callis
- Lilly Research Laboratories, Eli Lilly & Company, Indianapolis, IN, USA
| | | | | | - Troy Griffin
- Teva Branded Pharmaceutical Products R&D, West Chester, PA, USA
| | - Martin Kohan
- Clinical Pharmacology and Safety Sciences, R&D, AstraZeneca, Cambridge, UK
| | - Elizabeth A Martin
- Clinical Pharmacology and Safety Sciences, R&D, AstraZeneca, Cambridge, UK
| | | | | | | | - Maureen Cruz
- Faegre Drinker Biddle & Reath LLP, Washington, DC, USA
| | - Lee Nagao
- Faegre Drinker Biddle & Reath LLP, Washington, DC, USA
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Fukushima A, Hayashi T, Takeyoshi M. Acceptable Surface Limits (ASLs) of skin sensitizers derived from the local lymph node assay (LLNA): BrdU-ELISA EC1.6 values and their relationships to known sensitization potency information. J Appl Toxicol 2022; 42:1723-1730. [PMID: 35580980 DOI: 10.1002/jat.4339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 03/31/2022] [Accepted: 04/01/2022] [Indexed: 11/11/2022]
Abstract
Skin sensitization is an extremely important risk factor for occupational health and safety and it would be desirable to set Health-Based Exposure Limits (HBELs) for the Quantitative Risk Assessment (QRA) based on the skin sensitizing potencies of chemical. We attempted to set Acceptable Surface Limits (ASLs) as HBELs for skin sensitizers in the workplace based on the local lymph node assay (LLNA): BrdU-ELISA EC1.6 values. To calculate the ASLs, a Safety Assessment Factor (SAF)interspecies value of 6, based on the EC1.6 values/Human Repeat Insult Patch Test (HRIPT) NOEL ratios, a SAFinter-individual value of 10, and a SAFfrequency/duration value of 3 were applied, referring to previous literatures on SAFs for skin sensitization QRA, and the composite SAF was calculated as 180. The ASLs (mg/100 cm2 ) derived thus for 33 chemicals ranged from 0.001 to 10.417. Comparison of the ranges with known human sensitization potency classes and GHS subcategories revealed that use of GHS Category 1A chemicals needs to be controlled to ensure surface residue levels of less than 1 mg/100 cm2 . To minimize sensitization risks, a quantitative sensitization risk assessment method for chemicals and appropriate risk management are necessary. This report provides a potentially useful ASL-based method of managing sensitization risk derived from LLNA: BrdU-ELISA EC1.6 values, comparison of the ASLs and known human sensitization potency data showed that GHS subcategorization results would be a primary information notifying ASL ranges to be required for minimizing the sensitization risk.
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Affiliation(s)
- Asako Fukushima
- Chemicals Assessment and Research Center, Chemicals Evaluation and Research Institute, Japan, Tokyo, Japan
| | - Tae Hayashi
- Chemicals Assessment and Research Center, Chemicals Evaluation and Research Institute, Japan, Tokyo, Japan
| | - Masahiro Takeyoshi
- Chemicals Assessment and Research Center, Chemicals Evaluation and Research Institute, Japan, Tokyo, Japan
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Graham JC, Trejo-Martin A, Chilton ML, Kostal J, Bercu J, Beutner GL, Bruen US, Dolan DG, Gomez S, Hillegass J, Nicolette J, Schmitz M. An Evaluation of the Occupational Health Hazards of Peptide Couplers. Chem Res Toxicol 2022; 35:1011-1022. [PMID: 35532537 PMCID: PMC9214767 DOI: 10.1021/acs.chemrestox.2c00031] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Peptide couplers (also known as amide bond-forming reagents or coupling reagents) are broadly used in organic chemical syntheses, especially in the pharmaceutical industry. Yet, occupational health hazards associated with this chemical class are largely unexplored, which is disconcerting given the intrinsic reactivity of these compounds. Several case studies involving occupational exposures reported adverse respiratory and dermal health effects, providing initial evidence of chemical sensitization. To address the paucity of toxicological data, a pharmaceutical cross-industry task force was formed to evaluate and assess the potential of these compounds to cause eye and dermal irritation as well as corrosivity and dermal sensitization. The goal of our work was to inform health and safety professionals as well as pharmaceutical and organic chemists of the occupational health hazards associated with this chemical class. To that end, 25 of the most commonly used peptide couplers and five hydrolysis products were selected for in vivo, in vitro, and in silico testing. Our findings confirmed that dermal sensitization is a concern for this chemical class with 21/25 peptide couplers testing positive for dermal sensitization and 15 of these being strong/extreme sensitizers. We also found that dermal corrosion and irritation (8/25) as well as eye irritation (9/25) were health hazards associated with peptide couplers and their hydrolysis products (4/5 were dermal irritants or corrosive and 4/5 were eye irritants). Resulting outcomes were synthesized to inform decision making in peptide coupler selection and enable data-driven hazard communication to workers. The latter includes harmonized hazard classifications, appropriate handling recommendations, and accurate safety data sheets, which support the industrial hygiene hierarchy of control strategies and risk assessment. Our study demonstrates the merits of an integrated, in vivo -in silico analysis, applied here to the skin sensitization endpoint using the Computer-Aided Discovery and REdesign (CADRE) and Derek Nexus programs. We show that experimental data can improve predictive models by filling existing data gaps while, concurrently, providing computational insights into key initiating events and elucidating the chemical structural features contributing to adverse health effects. This interactive, interdisciplinary approach is consistent with Green Chemistry principles that seek to improve the selection and design of less hazardous reagents in industrial processes and applications.
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Affiliation(s)
- Jessica C Graham
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | | | - Martyn L Chilton
- Lhasa Limited, Granary Wharf House, 2 Canal Wharf, Leeds LS11 5PS, UK
| | - Jakub Kostal
- The George Washington University, Washington, D.C. 20052, United States
| | - Joel Bercu
- Gilead Sciences, Inc., Foster City, California 94404, United States
| | - Gregory L Beutner
- Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08901, United States
| | - Uma S Bruen
- Organon, Inc., 30 Hudson Street, Jersey City, New Jersey 07302, United States
| | - David G Dolan
- Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States
| | - Stephen Gomez
- Theravance Biopharma US, Inc., South San Francisco, California 94080, United States
| | - Jedd Hillegass
- Bristol Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08901, United States
| | - John Nicolette
- AbbVie Inc., 1 North Waukegan Road, North Chicago, Illinois 60064, United States
| | - Matthew Schmitz
- Takeda Pharmaceutical Company Limited, 35 Landsdowne St., Cambridge, Massachusetts 02139, United States
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Quantitative skin exposure assessment of metals: a systematic literature review of current approaches for risk assessment using the construction industry as an exposure scenario. Int Arch Occup Environ Health 2020; 93:789-803. [DOI: 10.1007/s00420-020-01531-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 02/18/2020] [Indexed: 10/24/2022]
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