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To NDK, Theruvathu JA. Determination and Quantification of Acetaldehyde, Acetone, and Methanol in Hand Sanitizers Using Headspace GC/MS: Effect of Storage Time and Temperature. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2024; 21:74. [PMID: 38248538 PMCID: PMC10815429 DOI: 10.3390/ijerph21010074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Revised: 01/05/2024] [Accepted: 01/07/2024] [Indexed: 01/23/2024]
Abstract
Accurate determination of the concentration of alcohols and their metabolites is important in forensics and in several life science areas. A new headspace gas chromatography-mass spectrometry method has been developed to quantify alcohols and their oxidative products using isotope-labeled internal standards. The limit of detection (LOD) of the analytes in the developed method was 0.211 µg/mL for methanol, 0.158 µg/mL for ethanol, 0.157 µg/mL for isopropanol, 0.010 µg/mL for n-propanol, 0.157 µg/mL for acetone, and 0.209 µg/mL for acetaldehyde. The precision and accuracy of the method were evaluated, and the relative standard deviation percentages were found to be less than 3%. This work demonstrates the application of this method, specifically in quantifying the concentration of oxidative products of alcohol and other minor alcohols found in hand sanitizers, which have become an essential household item since the COVID-19 pandemic. Apart from the major components, the minor alcohols found in hand sanitizers include methanol, isopropanol, and n-propanol. The concentration range of these minor alcohols found in ethanol-based hand sanitizer samples was as follows: methanol, 0.000921-0.0151 mg/mL; isopropanol, 0.454-13.8 mg/mL; and n-propanol, 0.00474-0.152 mg/mL. In ethanol-based hand sanitizers, a significant amount of acetaldehyde (0.00623-0.231 mg/mL) was observed as an oxidation product, while in the isopropanol-based hand sanitizer, acetone (0.697 mg/mL) was observed as an oxidation product. The concentration of acetaldehyde in ethanol-based hand sanitizers significantly increased with storage time and temperature, whereas no such increase in acetone concentration was observed in isopropanol-based hand sanitizers with storage time and temperature. In two of the selected hand sanitizers, the acetaldehyde levels increased by almost 200% within a week when stored at room temperature. Additionally, exposing the hand sanitizers to a temperature of 45 °C for 24 h resulted in a 100% increase in acetaldehyde concentration. On the contrary, the acetone level remained constant upon the change in storage time and temperature.
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Affiliation(s)
| | - Jacob A. Theruvathu
- Department of Natural Sciences, University of Houston-Downtown, Houston, TX 77002, USA;
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Regnault R, Klupsch F, El-Bouazzati H, Magnez R, Le Biannic R, Leleu-Chavain N, Ahouari H, Vezin H, Millet R, Goossens JF, Thuru X, Bailly C. Novel PD-L1-Targeted Phenyl-Pyrazolone Derivatives with Antioxidant Properties. Molecules 2023; 28:molecules28083491. [PMID: 37110727 PMCID: PMC10144346 DOI: 10.3390/molecules28083491] [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: 03/27/2023] [Revised: 04/05/2023] [Accepted: 04/13/2023] [Indexed: 04/29/2023] Open
Abstract
Orally-active anticancer small molecules targeting the PD-1/PD-L1 immune checkpoint are actively searched. Phenyl-pyrazolone derivatives with a high affinity for PD-L1 have been designed and characterized. In addition, the phenyl-pyrazolone unit acts as a scavenger of oxygen free radicals, providing antioxidant effects. The mechanism is known for the drug edaravone (1) which is also an aldehyde-reactive molecule. The present study reports the synthesis and functional characterization of new molecules (2-5) with an improved anti-PD-L1 activity. The leading fluorinated molecule 5 emerges as a potent checkpoint inhibitor, avidly binding to PD-L1, inducing its dimerization, blocking PD-1/PD-L1 signaling mediated by phosphatase SHP-2 and reactivating the proliferation of CTLL-2 cells in the presence of PD-L1. In parallel, the compound maintains a significant antioxidant activity, characterized using electron paramagnetic resonance (EPR)-based free radical scavenging assays with the probes DPPH and DMPO. The aldehyde reactivity of the molecules was investigated using 4-hydroxynonenal (4-HNE), which is a major lipid peroxidation product. The formation of drug-HNE adducts, monitored by high resolution mass spectrometry (HRMS), was clearly identified and compared for each compound. The study leads to the selection of compound 5 and the dichlorophenyl-pyrazolone unit as a scaffold for the design of small molecule PD-L1 inhibitors endowed with antioxidant properties.
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Affiliation(s)
- Romain Regnault
- ULR 7365-GRITA-Groupe de Recherche sur les formes Injectables et les Technologies Associées, CHU Lille, University Lille, F-59000 Lille, France
| | - Frédérique Klupsch
- U1286-INFINITE-Institute for Translational Research in Inflammation, ICPAL, Inserm, University Lille, F-59000 Lille, France
| | - Hassiba El-Bouazzati
- UMR9020-UMR1277-Canther-Cancer Heterogeneity, Plasticity and Resistance to Therapies, Inserm, CNRS, CHU Lille, University Lille, F-59000 Lille, France
| | - Romain Magnez
- UMR9020-UMR1277-Canther-Cancer Heterogeneity, Plasticity and Resistance to Therapies, Inserm, CNRS, CHU Lille, University Lille, F-59000 Lille, France
| | - Raphaël Le Biannic
- U1286-INFINITE-Institute for Translational Research in Inflammation, ICPAL, Inserm, University Lille, F-59000 Lille, France
| | - Natascha Leleu-Chavain
- U1286-INFINITE-Institute for Translational Research in Inflammation, ICPAL, Inserm, University Lille, F-59000 Lille, France
| | - Hania Ahouari
- LASIRE Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement, F-59655 Villeneuve d'Ascq, France
- FR 2638-IMEC-Institut Michel-Eugène Chevreul, University Lille, F-59655 Lille, France
| | - Hervé Vezin
- LASIRE Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement, F-59655 Villeneuve d'Ascq, France
| | - Régis Millet
- U1286-INFINITE-Institute for Translational Research in Inflammation, ICPAL, Inserm, University Lille, F-59000 Lille, France
| | - Jean-François Goossens
- ULR 7365-GRITA-Groupe de Recherche sur les formes Injectables et les Technologies Associées, CHU Lille, University Lille, F-59000 Lille, France
| | - Xavier Thuru
- UMR9020-UMR1277-Canther-Cancer Heterogeneity, Plasticity and Resistance to Therapies, Inserm, CNRS, CHU Lille, University Lille, F-59000 Lille, France
| | - Christian Bailly
- UMR9020-UMR1277-Canther-Cancer Heterogeneity, Plasticity and Resistance to Therapies, Inserm, CNRS, CHU Lille, University Lille, F-59000 Lille, France
- Oncowitan, Scientific Consulting Office, Wasquehal, F-59290 Lille, France
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