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Islam R, Deb A, Ghosh AJ, Dutta D, Ray A, Dutta A, Ghosh S, Sarkar S, Bahadur M, Kumar A, Saha T. Toxicological profiling of methanolic seed extract of Abutilon indicum (L.) Sweet: in-vitro and in-vivo analysis. JOURNAL OF ETHNOPHARMACOLOGY 2024; 335:118655. [PMID: 39097211 DOI: 10.1016/j.jep.2024.118655] [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: 07/02/2024] [Revised: 07/29/2024] [Accepted: 07/31/2024] [Indexed: 08/05/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Abutilon indicum, a shrub of the Malvaceae family, is found abundantly in tropical countries like India. A. indicum is widely used for its high medicinal properties. Traditionally, A. indicum seed powder is consumed to treat piles, constipation, chronic cystitis, gonorrhea, gleet, and pregnancy-related problems. Despite having numerous medicinal properties and widespread traditional use of A. indicum seeds, scientific validation, and toxicity studies have yet to be documented. AIMS OF THE STUDY The primary objective of this study is to conduct a comprehensive study on phytochemical profiling, in-vitro cytotoxicity, mutagenicity, and in-vivo acute and sub-acute toxicity, and genotoxicity on animal models of methanolic extract of A. indicum seed (MAS). MATERIALS AND METHODS The qualitative analysis of MAS was explored through FTIR and HR LC-MS. For in-vitro cytotoxicity, the HEK-293 cell line was used, and the TA100 (Staphylococcus typhimurium) bacterial strain was used for the Ames mutagenicity test. A single oral dose of 250, 500, 1000, or 2000 mg/kg body weight of MAS was given to each male and female rat for acute toxicity study and observed for 14 days for any toxicity signs. In the sub-acute toxicity study, 250, 500, or 1000 mg/kg body weight of MAS was administered orally to each rat for 28 days. The experimental animals were weighed weekly, and general behavior was monitored regularly. After 28 days of the experiment, the rats were sacrificed, and different serum biochemical, hematological, and histological analyses were performed. The blood samples of different doses of MAS were used for genotoxicity study through comet assay. RESULTS FTIR analysis found different functional groups, which indicated the presence of phenolics, flavonoids, and alkaloids. HR LC-MS analysis depicts several components with different biological functions. The cell cytotoxicity and Ames mutagenicity results showed minimal toxicity and mutagenicity up to a certain dose. The acute toxicity study conducted in Wistar albino rats demonstrated zero mortality among the animals, and the LD50 value for seed extract was determined to be 2000 mg/kg body weight. Sub-acute toxicity assessments indicated that the administration of seed extract resulted in no adverse effects at dosages of 250 and 500 mg/kg body weight. However, at higher doses, specifically 1000 mg/kg body weight, the liver of the experimental rats exhibited some toxic effects. In the genotoxicity study, minimal DNA damage was found in 250 and 500 mg/kg doses, respectively, but slightly greater DNA damage was found in 1000 mg/kg doses in both male and female rats. CONCLUSIONS The consumption of A. indicum seed powder is deemed safe; however, doses exceeding 500 mg/kg body weight may raise concerns regarding use. These findings pave the path for the creation of innovative medicines with improved efficacy and safety profiles.
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Affiliation(s)
- Rejuan Islam
- Immunology and Microbiology Laboratory, Department of Zoology, University of North Bengal, Darjeeling, West Bengal, 734013, India
| | - Arijit Deb
- Immunology and Microbiology Laboratory, Department of Zoology, University of North Bengal, Darjeeling, West Bengal, 734013, India
| | - Amlan Jyoti Ghosh
- Immunology and Microbiology Laboratory, Department of Zoology, University of North Bengal, Darjeeling, West Bengal, 734013, India
| | - Debojit Dutta
- Genetics and Moleular Biology Labratoty, Department of Zoology, University of North Bengal, Darjeeling, West Bengal, 734013, India
| | - Arpita Ray
- Genetics and Moleular Biology Labratoty, Department of Zoology, University of North Bengal, Darjeeling, West Bengal, 734013, India
| | - Ankita Dutta
- Advanced Nanoscale Molecular Oncology Laboratory, Department of Biotechnology, University of North Bengal, Darjeeling, 734013, India
| | - Supriyo Ghosh
- Immunology and Microbiology Laboratory, Department of Zoology, University of North Bengal, Darjeeling, West Bengal, 734013, India
| | - Sagar Sarkar
- Immunology and Microbiology Laboratory, Department of Zoology, University of North Bengal, Darjeeling, West Bengal, 734013, India; Department of Zoology, Siliguri College, Darjeeling, West Bengal, 734001, India
| | - Min Bahadur
- Genetics and Moleular Biology Labratoty, Department of Zoology, University of North Bengal, Darjeeling, West Bengal, 734013, India
| | - Anoop Kumar
- Advanced Nanoscale Molecular Oncology Laboratory, Department of Biotechnology, University of North Bengal, Darjeeling, 734013, India
| | - Tilak Saha
- Immunology and Microbiology Laboratory, Department of Zoology, University of North Bengal, Darjeeling, West Bengal, 734013, India.
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Araujo NGR, Araujo-Lima CF, Oliveira RTD, Macedo AF, Felzenszwalb I. In vitro cytotoxicity and genotoxicity assessment of methanolic extracts of vanillas from Brazilian biodiversity with commercial potential. Toxicol Rep 2024; 13:101693. [PMID: 39131696 PMCID: PMC11314876 DOI: 10.1016/j.toxrep.2024.101693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2024] [Accepted: 07/11/2024] [Indexed: 08/13/2024] Open
Abstract
The Vanilla genus is crucial for global production in food, perfume, and pharmaceutical industries. However, exploitation threatens some species, leading to extinction. Traditional communities use vanilla for medicinal purposes, and there are species like Vanilla chamissonis Klotzsch and Vanilla bahiana Hoehne with potential to occupy the market. For this, methanolic extraction of these two mentioned species was conducted alongside Vanilla planifolia. Analyzes of the cell viability, mutagenic and genotoxic potential were performed. In the Ames test, the assays were performed with concentrations from 0.5 and 5000 μg/ml and on five strains. Only Vanilla planifolia exhibited mutagenicity at the highest concentration in the TA98 strain. Viability tests were performed within a dose range of 0.05-5000 µg/ml and 24, 48, and 72-hour exposures. It was possible to observe a reduction in cell viability observed only at the highest concentration, for all three species and both cell types tested. Genotoxicity induction by the extracts was assessed at concentrations from 0.5 to 500 µg/ml through the cytokinesis-block micronucleus assay. No genotoxic damage or reduction in the Nucleus Division Index (NDI). The study found no mutagenicity, cytotoxicity, or genotoxicity in the species tested, indicating potential human use for food or pharmaceutical purposes.
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Affiliation(s)
| | - Carlos Fernando Araujo-Lima
- Laboratory of Environmental Mutagenesis (LABMUT), University of Rio de Janeiro State (UERJ), Rio de Janeiro, RJ, Brazil
- Laboratory of Pharmaceutical and Technological Innovation, Federal University of Rio de Janeiro State (UNIRIO), Rio de Janeiro, RJ, Brazil
| | - Renatha Tavares de Oliveira
- Laboratory of Integrated Plant Biology (LIBV) - Federal University of Rio de Janeiro State (UNIRIO), Rio de Janeiro, RJ, Brazil
| | - Andrea Furtado Macedo
- Laboratory of Integrated Plant Biology (LIBV) - Federal University of Rio de Janeiro State (UNIRIO), Rio de Janeiro, RJ, Brazil
| | - Israel Felzenszwalb
- Laboratory of Environmental Mutagenesis (LABMUT), University of Rio de Janeiro State (UERJ), Rio de Janeiro, RJ, Brazil
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de Oliveira RT, da Silva Oliveira JP, da Silva ALM, Carrão Dantas EK, Koblitz MGB, Bello ML, Felzenszwalb I, Araújo-Lima CF, Macedo AF. Vanilla from Brazilian Atlantic Forest: In vitro and in silico toxicity assessment and high-resolution metabolomic analysis of Vanilla spp. ethanolic extracts. Food Chem 2024; 456:139948. [PMID: 38852444 DOI: 10.1016/j.foodchem.2024.139948] [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: 01/25/2024] [Revised: 05/27/2024] [Accepted: 05/31/2024] [Indexed: 06/11/2024]
Abstract
The natural vanilla market, which generates millions annually, is predominantly dependent on Vanilla planifolia, a species characterized by low genetic variability and susceptibility to pathogens. There is an increasing demand for natural vanilla, prized for its complex, authentic, and superior quality compared to artificial counterparts. Therefore, there is a necessity for innovative production alternatives to ensure a consistent and stable supply of vanilla flavors. In this context, vanilla crop wild relatives (WRs) emerge as promising natural sources of the spice. However, these novel species must undergo toxicity assessments to evaluate potential risks and ensure safety for consumption. This study aimed to assess the non-mutagenic and non-carcinogenic properties of ethanolic extracts from V. bahiana, V. chamissonis, V. cribbiana, and V. planifolia through integrated metabolomic profiling, in vitro toxicity assays, and in silico analyses. The integrated approach of metabolomics, in vitro assays, and in silico analyses has highlighted the need for further safety assessments of Vanilla cribbiana ethanolic extract. While the extracts of V. bahiana, V. chamissonis, and V. planifolia generally demonstrated non-mutagenic properties in the Ames assay, V. cribbiana exhibited mutagenicity at high concentrations (5000 μg/plate) in the TA98 strain without metabolic activation. This finding, coupled with the dose-dependent cytotoxicity observed in WST-1 (Water Soluble Tetrazolium) assays, a colorimetric method that assesses the viability of cells exposed to a test substance, underscores the importance of concentration in the safety evaluation of these extracts. Kaempferol and pyrogallol, identified with higher intensity in V. cribbiana, are potential candidates for in vitro mutagenicity. Although the results are not conclusive, they suggest the safety of these extracts at low concentrations. This study emphasizes the value of an integrated approach in providing a nuanced understanding of the safety profiles of natural products, advocating for cautious use and further research into V. cribbiana mutagenicity.
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Affiliation(s)
- Renatha Tavares de Oliveira
- Integrated Laboratory of Plant Biology (LIBV), Institute of Biosciences, Federal University of the State of Rio de Janeiro - UNIRIO, Av. Pasteur, 458 Urca, Rio de Janeiro, RJ, Brazil
| | - Joana Paula da Silva Oliveira
- Integrated Laboratory of Plant Biology (LIBV), Institute of Biosciences, Federal University of the State of Rio de Janeiro - UNIRIO, Av. Pasteur, 458 Urca, Rio de Janeiro, RJ, Brazil
| | - Ana Laura Mourão da Silva
- Integrated Laboratory of Plant Biology (LIBV), Institute of Biosciences, Federal University of the State of Rio de Janeiro - UNIRIO, Av. Pasteur, 458 Urca, Rio de Janeiro, RJ, Brazil
| | - Eduardo Kennedy Carrão Dantas
- Laboratory of Environmental Mutagenicity, Department of Biophysics and Biometry, Rio de Janeiro State University, UERJ, Rio de Janeiro, Brazil
| | - Maria Gabriela Bello Koblitz
- Food and Nutrition Graduate Program (PPGAN), Federal University of the State of Rio de Janeiro - UNIRIO, Av. Pasteur, 296 Urca, Rio de Janeiro, RJ, Brazil
| | - Murilo Lamim Bello
- Laboratory of Pharmaceutical Planning and Computational Simulation (LaPFarSC), Faculty of Pharmacy, Federal University of Rio de Janeiro (UFRJ), Brazil
| | - Israel Felzenszwalb
- Laboratory of Environmental Mutagenicity, Department of Biophysics and Biometry, Rio de Janeiro State University, UERJ, Rio de Janeiro, Brazil
| | - Carlos Fernando Araújo-Lima
- Laboratory of Environmental Mutagenicity, Department of Biophysics and Biometry, Rio de Janeiro State University, UERJ, Rio de Janeiro, Brazil; Food and Nutrition Graduate Program (PPGAN), Federal University of the State of Rio de Janeiro - UNIRIO, Av. Pasteur, 296 Urca, Rio de Janeiro, RJ, Brazil.
| | - Andrea Furtado Macedo
- Integrated Laboratory of Plant Biology (LIBV), Institute of Biosciences, Federal University of the State of Rio de Janeiro - UNIRIO, Av. Pasteur, 458 Urca, Rio de Janeiro, RJ, Brazil
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Li X, Wang L, Li S, Huo J, Bian L, Zhang Y, Wang X, Yao J. Evaluation of genotoxicity and teratogenicity of phillyrin. Toxicon 2024; 249:108080. [PMID: 39197594 DOI: 10.1016/j.toxicon.2024.108080] [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: 04/26/2024] [Revised: 08/08/2024] [Accepted: 08/22/2024] [Indexed: 09/01/2024]
Abstract
Phillyrin is extracted from Forsythia suspensa (Thunb.) Vahl, is significantly higher in (unripe Forsythiae Fructus) Qing qiao than in (ripe Forsythiae Fructus) Lao qiao fruits of the plant. However, the toxicity of phillyrin has not been adequately investigated. The study investigates the genetic and teratogenic effects of phillyrin to determine its safety profile. Assessing the genotoxicity and teratogenicity of phillyrin involved various tests, such as the bacterial reverse mutation assay, mammalian erythrocyte micronucleus assay, spermatocyte chromosome aberration assay, and teratogenicity assay. The results demonstrated that phillyrin exhibited no discernible impact on the following: number of colonies that spontaneously revert for Salmonella typhimurium TA 97, TA98, TA100, TA102, and TA1535, frequency of bone marrow polychromatic erythrocytes, and the rate of chromosomal aberrations. In the teratogenicity test, the pregnant rats exhibited no signs of toxicity or abnormal changes, and the growth, embryonic development, and visual anatomy of each pup were normal. In comparison with the negative control group, there were no significant differences in fetal body weight, mortality, deformity rate, malformed nest rate, gravid uterus weight, average number of fetuses per litter, fetal body length, or visceral and skeletal development in each dose group. In conclusion, these findings provide evidence that phillyrin does not exhibit genotoxic or teratogenic effects, supporting its potential safety for pharmacological applications.
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Affiliation(s)
- Xuemin Li
- School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, 030001, PR China; Center for Disease Control and Prevention in Shanxi Province, Taiyuan, Shanxi, 030012, PR China.
| | - Liru Wang
- School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, 030001, PR China
| | - Shuqin Li
- Center for Disease Control and Prevention in Shanxi Province, Taiyuan, Shanxi, 030012, PR China
| | - Junfeng Huo
- Center for Disease Control and Prevention in Shanxi Province, Taiyuan, Shanxi, 030012, PR China
| | - Linxiu Bian
- Center for Disease Control and Prevention in Shanxi Province, Taiyuan, Shanxi, 030012, PR China
| | - Ying Zhang
- Center for Disease Control and Prevention in Shanxi Province, Taiyuan, Shanxi, 030012, PR China
| | - Xiaorui Wang
- Center for Disease Control and Prevention in Shanxi Province, Taiyuan, Shanxi, 030012, PR China
| | - Jie Yao
- Center for Disease Control and Prevention in Shanxi Province, Taiyuan, Shanxi, 030012, PR China
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Bak SM, Back SM, Kim DY, Jung S, Jeung NY, Kim NY, Han KH, Kim YB, Lee BS, Park JH, Cho HJ, Lee HG, Ozden O, Kim SK, Park SH. Differential genotoxicity of Polygoni Multiflori in rat and human: insights from Ames test and S9 metabolic activation system. Sci Rep 2024; 14:21433. [PMID: 39271730 PMCID: PMC11399298 DOI: 10.1038/s41598-024-72283-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Accepted: 09/05/2024] [Indexed: 09/15/2024] Open
Abstract
The Ames test is used worldwide to initially screen the mutagenic potential of new chemicals. In the standard Ames test, S. typhimurium strains (TA100, TA98, TA1535, and TA1537) and Escherichia coli (WP2uvrA) are treated with substances with/without cytochrome P450s (CYPs)-induced rat S9 fractions for identifying mutagens and pro-mutagens. However, many substances show completely different toxicity patterns depending on whether the liver S9 fraction belongs to rats or humans. The natural product Polygoni Multiflori Radix (PMR) can also show bacterial reverse mutation, followed by the rat or human liver S9 fraction. While PMR elicits reverse mutations in the TA1537 strain in rat liver S9 but not in human liver S9, this mechanism has not been verified yet. To explain this, the differences in metabolic enzymes compositions commonly observed between rats and humans have been implicated. This study aimed to explore the key factors that cause differences in the genotoxicity of PMR between rat and human liver S9 metabolic enzymes. The results of next-generation sequencing (NGS) analysis showed that both rat and human metabolic enzymes caused similar mutations in TA1537. However, when the metabolic enzymes in each S9 fraction were analyzed using ion mobility tandem mass spectrometry (IM-MS), rat- and human-specific enzymes were identified among the cytochrome (CYP) family, especially aryl hydrocarbon receptor (AHR)-related CYPs. These findings suggest that CYP1A1 isoforms contribute to the mechanism of PMR in the Ames test. Therefore, an in vitro Ames test might be more reliable in predicting genotoxicity for both rodents and humans. This will also help overcome the limitations of laboratory animal-based toxicity evaluations, which provide unreliable results due to interspecies differences between humans and rodents.
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Affiliation(s)
- Su-Min Bak
- Genetic and Epigenetic Toxicology Research Group, Korea Institute of Toxicology, Korea Institute of Toxicology, Daejeon, 34114, Republic of Korea
| | - Seng-Min Back
- Genetic and Epigenetic Toxicology Research Group, Korea Institute of Toxicology, Korea Institute of Toxicology, Daejeon, 34114, Republic of Korea
- College of Pharmacy, Chungnam National University, 9 Daehak-Ro, Yuseong-Gu, Daejeon, 34134, Republic of Korea
| | - Da Yeon Kim
- Genetic and Epigenetic Toxicology Research Group, Korea Institute of Toxicology, Korea Institute of Toxicology, Daejeon, 34114, Republic of Korea
| | - Soyoung Jung
- Genetic and Epigenetic Toxicology Research Group, Korea Institute of Toxicology, Korea Institute of Toxicology, Daejeon, 34114, Republic of Korea
| | - Na-Young Jeung
- Genetic and Epigenetic Toxicology Research Group, Korea Institute of Toxicology, Korea Institute of Toxicology, Daejeon, 34114, Republic of Korea
| | - Nan-Young Kim
- Genetic and Epigenetic Toxicology Research Group, Korea Institute of Toxicology, Korea Institute of Toxicology, Daejeon, 34114, Republic of Korea
| | - Kang-Hyun Han
- Regulatory Toxicology Research Division, Korea Institute of Toxicology, Daejeon, 34114, Republic of Korea
| | - Yong-Bum Kim
- Department of Advanced Toxicology Research, Korea Institute of Toxicology, Daejeon, 34114, Republic of Korea
| | - Byoung-Seok Lee
- Department of Advanced Toxicology Research, Korea Institute of Toxicology, Daejeon, 34114, Republic of Korea
| | - Jun Hong Park
- Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine, Naju-Si, 58245, South Korea
| | - Hee Jun Cho
- Immunotherapy Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea
| | - Hee Gu Lee
- Immunotherapy Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea
| | - Ozkan Ozden
- Department of Bioengineering, Faculty of Engineering and Architecture, Kafkas University, 36100, Kars, Turkey
| | - Sang Kyum Kim
- College of Pharmacy, Chungnam National University, 9 Daehak-Ro, Yuseong-Gu, Daejeon, 34134, Republic of Korea.
| | - Seong-Hoon Park
- Genetic and Epigenetic Toxicology Research Group, Korea Institute of Toxicology, Korea Institute of Toxicology, Daejeon, 34114, Republic of Korea.
- Toxicology Mechanism Research Division, Korea Institute of Toxicology, Daejeon, 34114, Republic of Korea.
- Genetic Toxicology Research Group, Toxicology Mechanism Research Division, Korea Institute of Toxicology, 141 Gajeong-Ro, Yuseong-Gu, Daejeon, 34114, Republic of Korea.
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Gandhi RD, Hickert S, Hoevelmann Y, Mee CD, Schlingemann J, Adams A, Blanazs A, Simon S, Elloway J, Rigger L, Teasdale A, Beaumont CV, Wright L, Doherty A. Escaping the cohort of concern: in vitro experimental evidence supports non-mutagenicity of N-nitroso-hydrochlorothiazide. Arch Toxicol 2024:10.1007/s00204-024-03859-3. [PMID: 39259282 DOI: 10.1007/s00204-024-03859-3] [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: 07/08/2024] [Accepted: 08/29/2024] [Indexed: 09/13/2024]
Abstract
In recent years, nitrosamine impurities in pharmaceuticals have been subject to intense regulatory scrutiny, with nitrosamine drug substance-related impurities (NDSRIs) treated as cohort of concern impurities, regardless of predicted mutagenic potential. Here, we describe a case study of the NDSRI N-nitroso-hydrochlorothiazide (NO-HCTZ), which was positive in the bacterial reverse mutation (Ames) test but is unstable under the test conditions, generating formaldehyde among other products. The mutagenic profile of NO-HCTZ was inconsistent with that expected of a mutagenic nitrosamine, exhibiting mutagenicity in the absence of metabolic activation, and instead aligned well with that of formaldehyde. To assess further, a modified Ames system including glutathione (3.3 mg/plate) to remove formaldehyde was developed. Strains used were S. typhimurium TA98, TA100, TA1535, and TA1537, and E. coli WP2 uvrA/pKM101. In this system, formaldehyde levels were considerably lower, with a concomitant increase in levels of S-(hydroxymethyl)glutathione (the adduct formed between glutathione and formaldehyde). Upon retesting NO-HCTZ in the modified system (1.6-5000 µg/plate), a clear decrease in the mutagenic response was observed in the strains in which NO-HCTZ was mutagenic in the original system (TA98, TA100, and WP2 uvrA/pKM101), indicating that formaldehyde drives the response, not NO-HCTZ. In strain TA1535, an increase in revertant colonies was observed in the modified system, likely due to a thiatriazine degradation product formed from NO-HCTZ under Ames test conditions. Overall, these data support a non-mutagenic designation for NO-HCTZ and demonstrate the value of further investigation when a positive Ames result does not align with the expected profile.
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Affiliation(s)
- R D Gandhi
- Safety Sciences, R&D, AstraZeneca, Cambridge, UK
| | | | | | - C D Mee
- Gentronix Ltd. Alderley Park, Macclesfield, UK
| | | | - A Adams
- Chemical Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield, UK
| | - A Blanazs
- Chemical Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield, UK
| | - S Simon
- Merck KGaA, Darmstadt, Germany
| | - J Elloway
- Safety Sciences, R&D, AstraZeneca, Cambridge, UK
| | - L Rigger
- Reference Materials R&D, Merck KGaA, Buchs, Switzerland
| | - A Teasdale
- Chemical Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield, UK
| | - C V Beaumont
- Safety Sciences, R&D, AstraZeneca, Cambridge, UK
| | - L Wright
- Safety Sciences, R&D, AstraZeneca, Macclesfield, UK
| | - A Doherty
- Safety Sciences, R&D, AstraZeneca, Cambridge, UK
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Matranxhi B, Mertens B, Anthonissen R, Maes J, Ny A, de Witte P, Brouhon JM, De Bast B, Elskens M. Assessment of receptor-mediated activity (AhR and ERα), mutagenicity, and teratogenicity of metal shredder wastes in Wallonia, Belgium. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-34820-7. [PMID: 39225929 DOI: 10.1007/s11356-024-34820-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Accepted: 08/23/2024] [Indexed: 09/04/2024]
Abstract
In this study, hazardous wastes including fluff, dust, and scrubbing sludge were sampled in 2019 from two metal shredding facilities located in Wallonia, Belgium. To assess the extent of the contamination, a global approach combining chemical and biological techniques was used, to better reflect the risks to health and the environment. The samples investigated induced significant in vitro aryl hydrocarbon receptor (AhR) agonistic bioactivities and estrogenic receptor (ERα) (ant)agonistic bioactivities in the respective CALUX (chemical activated luciferase gene expression) bioassays. The mutagenicity of the samples was investigated with the bacterial reverse gene mutation test using the Salmonella typhimurium TA98 and TA100 strains. Except for the sludge sample (site 3), all samples induced a mutagenic response in the TA98 strain (± S9 metabolic fraction) whereas in the TA100 strain (+ S9 metabolic fraction), only the sludge sample (site 2) showed a clear mutagenic effect. The in vivo toxicity/teratogenicity of the shredder wastes was further evaluated with zebrafish embryos. Except for the dust sample (site 2), all samples were found to be teratogenic as they returned teratogenic indexes (TIs) > 1. The high levels of contamination, the mutagenicity, and the teratogenicity of these shredder wastes raise significant concerns about their potential negative impacts on both human health and environment.
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Affiliation(s)
- Besarta Matranxhi
- Laboratory of Archaeology, Environmental Changes and Geo-Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Ixelles, Belgium
| | - Birgit Mertens
- Sciensano, SD Chemical and Physical Health Risks, Rue Juliette Wytsman 14, 1050, Ixelles, Belgium
| | - Roel Anthonissen
- Sciensano, SD Chemical and Physical Health Risks, Rue Juliette Wytsman 14, 1050, Ixelles, Belgium
| | - Jan Maes
- Laboratory for Molecular Biodiscovery, KU Leuven, Gasthuisberg Campus O&N 2, Herestraat 49, 3000, Leuven, Belgium
| | - Annelii Ny
- Laboratory for Molecular Biodiscovery, KU Leuven, Gasthuisberg Campus O&N 2, Herestraat 49, 3000, Leuven, Belgium
| | - Peter de Witte
- Laboratory for Molecular Biodiscovery, KU Leuven, Gasthuisberg Campus O&N 2, Herestraat 49, 3000, Leuven, Belgium
| | - Jean-Marc Brouhon
- Walloon Air and Climate Agency (AwAC), Public Service of Wallonia, Jambes, Belgium
| | - Benoit De Bast
- Walloon Air and Climate Agency (AwAC), Public Service of Wallonia, Jambes, Belgium
| | - Marc Elskens
- Laboratory of Archaeology, Environmental Changes and Geo-Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Ixelles, Belgium.
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Espinosa-Aguirre JJ, Camacho-Carranza R, Hernández-Ojeda SL, Cárdenas-Ávila RI, Santes-Palacios R. Apiole, an important constituent of parsley, is a mixed-type inhibitor of the CYP1A subfamily. Mutat Res 2024; 829:111881. [PMID: 39191149 DOI: 10.1016/j.mrfmmm.2024.111881] [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: 05/14/2024] [Revised: 07/18/2024] [Accepted: 08/14/2024] [Indexed: 08/29/2024]
Abstract
Apiole (1-allyl-2,5-dimethoxy-3,4-methylenedioxybenzene) and parsley leaves ethanolic extract containing it inhibit the rat liver microsomal ethoxy- and methoxyresorufin-O-deacetylase activities associated with cytochrome P450 (CYP) 1A1 and 1A2, respectively. Cytochrome P4501A subfamily metabolizes environmental mutagens and several drugs, leading to the formation of mutagenic metabolites. Docking analysis showed that residue Phe123 within the active site of the CYP1A1 enzyme is bound to apiole through a π/π stacking of its benzene ring. In the case of 1A2, its Phe226 interacts with the dioxolane ring of apiole. Furthermore, apiole behaves as a mixed-type inhibitor of bacterial human recombinant CYP1A1. To explore one of the possible biological implications of this inhibitory effect, we tested the capacity of apiole and the parsley ethanolic extract to interfere with the mutagenicity of the promutagen 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx) metabolized by CYP1A subfamily. As expected, both apiole and the plant extract reduced the number of revertant colonies of Salmonella typhimurium TA98 Ames strain after exposure to MeIQx, reaching a 78 % and 100 % reduction, respectively. Neither apiol nor parsley extract were mutagenic to the TA98 strain. We speculate that consuming apiole, a constituent of edible herbs, in conjunction with the utilization of pharmaceuticals metabolized by the CYP1A subfamily, may result in herb-drug interactions. Furthermore, the consumption of apiole by individuals who regularly ingest fresh vegetables may contribute to the low incidence of cancer observed in those who adhere to such a dietary regimen.
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Affiliation(s)
- J J Espinosa-Aguirre
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Tercer Circuito Exterior sin Número, Ciudad Universitaria, Ciudad de México 04510, Mexico.
| | - R Camacho-Carranza
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Tercer Circuito Exterior sin Número, Ciudad Universitaria, Ciudad de México 04510, Mexico.
| | - S L Hernández-Ojeda
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Tercer Circuito Exterior sin Número, Ciudad Universitaria, Ciudad de México 04510, Mexico
| | - R I Cárdenas-Ávila
- Facultad de Ciencias, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Ciudad de México 04510, Mexico
| | - R Santes-Palacios
- Laboratorio de Toxicología Genética, Instituto Nacional de Pediatría, Insurgentes Sur 3700-C, Insurgentes Cuicuilco, Coyoacán, Ciudad de México C. P. 04530, Mexico
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9
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Singh AK, Rai A, Joshi I, Reddy DN, Guha R, Alka K, Shukla S, Rath SK, Nazir A, Clement JP, Kundu TK. Oral Administration of a Specific p300/CBP Lysine Acetyltransferase Activator Induces Synaptic Plasticity and Repairs Spinal Cord Injury. ACS Chem Neurosci 2024; 15:2741-2755. [PMID: 38795032 DOI: 10.1021/acschemneuro.4c00124] [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] [Indexed: 05/27/2024] Open
Abstract
TTK21 is a small-molecule activator of p300/creb binding protein (CBP) acetyltransferase activity, which, upon conjugation with a glucose-derived carbon nanosphere (CSP), can efficiently cross the blood-brain barrier and activate histone acetylation in the brain. Its role in adult neurogenesis and retention of long-term spatial memory following intraperitoneal (IP) administration is well established. In this study, we successfully demonstrate that CSP-TTK21 can be effectively administered via oral gavage. Using a combination of molecular biology, microscopy, and electrophysiological techniques, we systematically investigate the comparative efficacy of oral administration of CSP and CSP-TTK21 in wild-type mice and evaluate their functional effects in comparison to intraperitoneal (IP) administration. Our findings indicate that CSP-TTK21, when administered orally, induces long-term potentiation in the hippocampus without significantly altering basal synaptic transmission, a response comparable to that achieved through IP injection. Remarkably, in a spinal cord injury model, oral administration of CSP-TTK21 exhibits efficacy equivalent to that of IP administration. Furthermore, our research demonstrates that oral delivery of CSP-TTK21 leads to improvements in motor function, histone acetylation dynamics, and increased expression of regeneration-associated genes (RAGs) in a spinal injury rat model, mirroring the effectiveness of IP administration. Importantly, no toxic and mutagenic effects of CSP-TTK21 are observed at a maximum tolerated dose of 1 g/kg in Sprague-Dawley (SD) rats via the oral route. Collectively, these results underscore the potential utility of CSP as an oral drug delivery system, particularly for targeting the neural system.
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Affiliation(s)
- Akash Kumar Singh
- Transcription and Disease Laboratory, Molecular Biology, and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru 560 064, India
- Neuroscience Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India
| | - Amrish Rai
- Division of Neuroscience and Ageing Biology, CSIR-Central Drug Research Institute, Lucknow 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ila Joshi
- Transcription and Disease Laboratory, Molecular Biology, and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru 560 064, India
| | - Damodara N Reddy
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Rajdeep Guha
- Division of Laboratory Animal Facility, CSIR-Central Drug Research Institute, Lucknow 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Kumari Alka
- Division of Neuroscience and Ageing Biology, CSIR-Central Drug Research Institute, Lucknow 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Shubha Shukla
- Division of Neuroscience and Ageing Biology, CSIR-Central Drug Research Institute, Lucknow 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Srikanta Kumar Rath
- Division of Toxicology and Experimental Medicine, CSIR-Central Drug Research Institute, Lucknow 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Aamir Nazir
- Division of Neuroscience and Ageing Biology, CSIR-Central Drug Research Institute, Lucknow 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - James P Clement
- Neuroscience Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India
| | - Tapas K Kundu
- Transcription and Disease Laboratory, Molecular Biology, and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru 560 064, India
- Neuroscience Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India
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10
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Moriwaki N, Arimoto-Kobayashi S. Photomutagenicity of N-nitrosoproline dissolved in non-aqueous solvent, oleic acid. MUTATION RESEARCH. GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2024; 898:503794. [PMID: 39147448 DOI: 10.1016/j.mrgentox.2024.503794] [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: 05/21/2024] [Revised: 07/01/2024] [Accepted: 07/04/2024] [Indexed: 08/17/2024]
Abstract
In the present study, we investigated the genotoxicity of the active products formed from N-nitrosoproline (NPRO) dissolved in oleic acid following ultraviolet A (UVA) irradiation, bypassing the need for metabolic activation. We previously demonstrated the photomutagenicity of NPRO dissolved in a phosphate-buffered solution. It has been suggested that the association of the nitrosamine group with acid ions facilitates rapid photodissociation and photoactivation. We hypothesized that NPRO's inherent carboxyl group may mimic an acid, inducing photodissociation and photomutagenicity, even in a non-aqueous solvent lacking acidic ions. Following UVA irradiation, NPRO dissolved in oleic acid exhibited a dose-dependent mutagenic activity. Similar results were obtained when NPRO was dissolved in linoleic acid and triolein. Nitric oxide formation, which is dependent on NPRO concentration, is accompanied by mutagenic activity. The mutagenicity spectrum obtained in response to NPRO irradiation followed the absorption curve of NPRO dissolved in oleic acid. Irradiated NPRO in oleic acid displayed relative stability, retaining approximately 18, 36, and 63 % of initial mutagenicity after 10 days of storage at 25, 4, and -20 °C, respectively. Thus NPRO stored in a fatty environment undergoes photoactivation upon irradiation, leading to genotoxicity.
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Affiliation(s)
- Naofumi Moriwaki
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8530, Japan
| | - Sakae Arimoto-Kobayashi
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8530, Japan.
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11
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Rane R, Satpute B, Kumar D, Suryawanshi M, Prabhune AG, Gawade B, Mahajan A, Pawar A, Sakat S. Mutagenic and genotoxic in silico QSAR prediction of dimer impurity of gliflozins; canagliflozin, dapaglifozin, and emphagliflozin and in vitro evaluation by Ames and micronucleus test. Drug Chem Toxicol 2024:1-10. [PMID: 39072496 DOI: 10.1080/01480545.2024.2378768] [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: 02/18/2024] [Revised: 06/14/2024] [Accepted: 07/06/2024] [Indexed: 07/30/2024]
Abstract
Canagliflozin, Dapagliflozin, and Empagliflozin, glucagon-like peptide-1 receptor agonists, are indicated for managing type II diabetes. Although the genotoxicity profiles of these drugs are well-explored, limited information exists regarding the genotoxic potential of their impurities. In this investigation, the dimer impurities of Canagliflozin, Dapagliflozin, and Empagliflozin underwent both in silico and in vitro assessments for mutagenic potential. Tester strains of Salmonella typhimurium and Escherichia coli were subjected to the Ames test, utilizing concentrations of up to 1 µg per plate, with and without the presence of metabolic activation. Evaluation of micronucleus induction in TK6 cells was conducted through a micronucleus test, exploring concentrations up to 500 µg/mL, with or without the presence of exogenous metabolic activation. Under the specific test conditions, the dimer impurities of Canagliflozin, Dapagliflozin, and Empagliflozin showed no evidence of mutagenicity or clastrogenicity, establishing their in vitro classification as nonmutagenic. These findings align with negative in silico predictions from quantitative structure-activity relationship (QSAR) analyses for mutagenicity and genotoxicity of the dimer impurities. Collectively, these studies contribute clinically relevant safety information by confirming that the dimer impurities of Canagliflozin, Dapagliflozin, and Empagliflozin are nonmutagenic and nongenotoxic, emphasizing the consistency between in silico and in vitro data.
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Affiliation(s)
- Rajesh Rane
- Department of Pharmaceutical Chemistry, BVDU Poona College of Pharmacy, Pune, India
| | - Bharat Satpute
- Department of Pharmaceutical Chemistry, BVDU Poona College of Pharmacy, Pune, India
| | - Dileep Kumar
- Department of Pharmaceutical Chemistry, BVDU Poona College of Pharmacy, Pune, India
| | - Mugdha Suryawanshi
- Department of Pharmaceutical Chemistry, BVDU Poona College of Pharmacy, Pune, India
| | | | - Bapu Gawade
- Director, Cleanchem Life Sciences Pvt. Ltd., Navi Mumbai, Maharashtra, India
| | - Anand Mahajan
- Department of Pharmaceutical Chemistry, Goa College of Pharmacy, Panaji, Goa, India
| | - Atmaram Pawar
- Department of Pharmaceutics, BVDU Poona College of Pharmacy, Pune, India
| | - Sachin Sakat
- Director, Shribios Innovations Pvt. Ltd, Pune, Maharashtra, India
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12
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Fekete-Kertész I, Márton R, Molnár M, Berkl Z, Hedwig S, Feigl V. Industrial ecotoxicology in focus: The unexplored environmental impacts of pilot-scale advanced filtration in Sc recovery. Heliyon 2024; 10:e33799. [PMID: 39027489 PMCID: PMC11255500 DOI: 10.1016/j.heliyon.2024.e33799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/30/2024] [Accepted: 06/27/2024] [Indexed: 07/20/2024] Open
Abstract
The demand within the European Union (EU) for the crucial raw material Scandium (Sc), coupled with the lack of sufficient recovery strategies, has gravitated research into exploiting alternative secondary sources. Utilizing residues from ore-production processes has proven to be a successful attempt for advanced Sc recovery. Despite the emergence of new technologies for Sc recovery from such residues, the potential environmental impacts of byproducts and technology wastes are often disregarded. Our study aimed to assess the environmental efficiency of a pilot-scale Sc recovery technology that relies solely on filtration. We employed a problem-specific ecotoxicity toolkit based on the approach of Direct Toxicity Assessment (DTA). The results of DTA provide an indication of the scale of the adverse effect of (contaminated) samples without the necessity of translating the results into chemical concentration. Standardized test methods (Aliivibrio fischeri bioluminescence inhibition, Daphnia magna lethality and Sinapis al b a root and shoot elongation inhibition) were applied, supplemented by a bioconcentration assessment with the D. magna bioaccumulation test method to gain insight on the bioaccumulation potential of different metals in the case of all samples from the filtration technology. Comprehensive genotoxicity evaluations were also implemented using three distinct test methods (Ames test, Ames MPF test, SOS Chromotest). We conducted a comparative direct toxicity assessment to anticipate the potential environmental impacts of residues generated at each filtration step on the aquatic ecosystem. Our findings indicate that the environmental impact of the generated intermediate and final residues was alleviated by the consecutive filtration steps employed. The pilot-scale application of the Sc recovery technology achieved a high and statistically significant reduction in toxicity according to each test organism during the filtration processes. Specifically, toxicity decreased by 73 %, 86 % and 87 % according to the Aliivibrio fischeri bioluminescence inhibition assay, the Sinapis alba shoot elongation inhibition test, and the Daphnia magna lethality test, respectively. The toolbox of industrial ecotoxicology is recommended to predict the environmental performance of metal recovery technologies related to potential ecosystem effects.
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Affiliation(s)
- Ildikó Fekete-Kertész
- Budapest University of Technology and Economics, Faculty of Chemical Technology and Biotechnology, Department of Applied Biotechnology and Food Science, H-1111, Budapest, Műegyetem rkp. 3., Hungary
| | - Rita Márton
- Budapest University of Technology and Economics, Faculty of Chemical Technology and Biotechnology, Department of Applied Biotechnology and Food Science, H-1111, Budapest, Műegyetem rkp. 3., Hungary
| | - Mónika Molnár
- Budapest University of Technology and Economics, Faculty of Chemical Technology and Biotechnology, Department of Applied Biotechnology and Food Science, H-1111, Budapest, Műegyetem rkp. 3., Hungary
| | - Zsófia Berkl
- Budapest University of Technology and Economics, Faculty of Chemical Technology and Biotechnology, Department of Applied Biotechnology and Food Science, H-1111, Budapest, Műegyetem rkp. 3., Hungary
| | - Sebastian Hedwig
- Institute for Ecopreneurship, University of Applied Sciences and Arts Northwestern Switzerland, School of Life Sciences, 4132, Muttenz, Switzerland
| | - Viktória Feigl
- Budapest University of Technology and Economics, Faculty of Chemical Technology and Biotechnology, Department of Applied Biotechnology and Food Science, H-1111, Budapest, Műegyetem rkp. 3., Hungary
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13
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Murbach TS, Glávits R, Endres JR, Hirka G, Vértesi A, Béres E, Pasics Szakonyiné I. An evaluation of the genotoxicity and 90-day repeated dose oral toxicity in rats of Porphyridium purpureum. J Appl Toxicol 2024. [PMID: 38950973 DOI: 10.1002/jat.4665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2024] [Revised: 06/05/2024] [Accepted: 06/10/2024] [Indexed: 07/03/2024]
Abstract
Interest in microalgae products for use in food is increasing, as demands for sustainable and cost-effective food choices grow due to the escalating global population and increase in climate-related struggles with agriculture. Toxicological assessments of some species of microalgae have been conducted, but there were little data available for the oral consumption of the red microalgae Porphyridium purpureum and no data on genotoxicity. This article articulates a genotoxicity assessment and a 90-day repeated dose oral toxicity study in rats performed according to OECD guidelines. Under the experimental conditions applied, the test item did not induce gene mutations by base pair changes or frameshifts in the genome of the strains used in the bacterial reverse mutation test. Similarly, the test item did not induce structural chromosomal aberrations in V79 hamster lung cells. The test item also did not cause chromosomal damage in bone marrow of mice in the mammalian micronucleus test. The no observed adverse effect level (NOAEL) of the 90-day repeated dose oral toxicity study in rats was determined to be the highest dose tested, 3000 mg/kg bw/day. These data add to the body of evidence regarding the safety of P. purpureum for human consumption.
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14
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Abdulrazzaq AMM. Assessing Genotoxicity of Bovine Pericardium in Guided Tissue Regeneration: Bacterial Reverse Mutation Assay With Exogenous Metabolic Activation. Cureus 2024; 16:e64078. [PMID: 38979024 PMCID: PMC11229664 DOI: 10.7759/cureus.64078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/08/2024] [Indexed: 07/10/2024] Open
Abstract
Introduction Guided tissue regeneration (GTR) is integral to periodontal therapy, facilitating the repair of osseous defects. Due to the widespread use of bovine pericardium (BP) in GTR, a thorough investigation into its genotoxicity is essential for patient safety and treatment efficacy. This study aimed to evaluate the genotoxic effects of local BP in GTR for periodontal osseous defects. Materials and methods The Bacterial Reverse Mutation Assay (Ames test) was used to assess the genotoxic potential of local BP. An exogenous metabolic activation system was employed to evaluate the direct effects of the material on bacterial cells. Results The study investigated the mutagenic effects of local BP across multiple strains of Salmonella typhimurium, utilizing concentrations ranging from 0.3125 mg/plate to 5 mg/plate. While some variability was observed in revertant counts, the generally low SDs suggest a consistent response to the test substance. The maximum revertant count for each strain did not significantly exceed the mean values, indicating the absence of notable outliers or exceptionally high revertant counts at any specific concentration. Based on the data and toxicity assessment criteria, there is insufficient evidence to suggest that the experimental material induces genotoxic effects in the tested bacterial strains under the provided experimental conditions. Conclusion This study assessed the mutagenic potential of local BP membranes used in GTR with the Ames test. Results showed no evidence of mutagenicity, as revertant counts did not exceed twice the negative control in all bacterial strains with exogenous metabolic activation. This suggests that bovine pericardium membranes are safe for medical use under the test conditions. The study highlights the biocompatibility and non-mutagenic nature of BP membranes in GTR for periodontal therapy.
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15
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Taychaworaditsakul W, Sawong S, Intatham S, Chansakaow S, Chewonarin T, Kunnaja P, Jaijoy K, Wittayapraparat A, Yusuk P, Charoensup W, Sireeratawong S. The Safety Assessment of Mutagenicity, Acute and Chronic Toxicity of the Litsea martabanica (Kurz) Hook.f. Water Leaf Extract. TOXICS 2024; 12:470. [PMID: 39058122 PMCID: PMC11281209 DOI: 10.3390/toxics12070470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2024] [Revised: 06/12/2024] [Accepted: 06/26/2024] [Indexed: 07/28/2024]
Abstract
Litsea martabanica (Kurz) Hook.f. has traditionally been used as an anti-insecticidal agent and as a medication due to its hepatoprotective properties by highland communities in Thailand. This study examined the mutagenicity, as well as the acute and chronic toxicity, of the L. martabanica water leaf extract in Sprague-Dawley rats. The pharmacognostic evaluation of L. martabanica was performed in this study to ensure its authenticity and purity. Then, the sample was extracted using decoction with water to obtain the crude water extract. The assessment of acute toxicity involved a single oral administration of 5000 mg/kg, whereas the chronic toxicity assessment comprised daily oral doses of 250, 750, and 2250 mg/kg over 270 days. Various physiological and behavioral parameters, as well as body and organ weights, were systematically monitored. The endpoint assessments involved hematological and biochemical analyses plus gross and histopathological assessments of the internal organs. Our results exhibited no mutagenic activation by the L. martabanica water leaf extract in the Ames test, and no acute toxicity was observed. In the chronic toxicity tests, no abnormalities were found in rats receiving the L. martabanica water leaf extract across multiple measures, comprising behavioral, physiological, and hematological indices. Crucially, the histopathological assessment corroborated previous studies, reporting an absence of any tissue abnormalities. The results revealed that the L. martabanica water leaf extract had no adverse effects on rats over 270 days of oral administration. This demonstrates its safety and crucial scientific evidence for informing public policy and enabling its potential future commercial use in both highland and lowland communities.
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Affiliation(s)
- Weerakit Taychaworaditsakul
- Clinical Research Center for Food and Herbal Product Trials and Development (CR-FAH), Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; (W.T.); (S.S.); (S.I.)
- Department of Pharmacology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
- Department of Biochemistry, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand;
| | - Suphunwadee Sawong
- Clinical Research Center for Food and Herbal Product Trials and Development (CR-FAH), Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; (W.T.); (S.S.); (S.I.)
- Department of Pharmacology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Supaporn Intatham
- Clinical Research Center for Food and Herbal Product Trials and Development (CR-FAH), Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; (W.T.); (S.S.); (S.I.)
- Department of Pharmacology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Sunee Chansakaow
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai 50200, Thailand; (S.C.); (W.C.)
| | - Teera Chewonarin
- Department of Biochemistry, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand;
| | - Phraepakaporn Kunnaja
- Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand;
| | - Kanjana Jaijoy
- McCormick Faculty of Nursing, Payap University, Chiang Mai 50000, Thailand;
| | - Absorn Wittayapraparat
- Highland Research and Development Institute (Public Organization), Chiang Mai 50200, Thailand; (A.W.); (P.Y.)
| | - Pedcharada Yusuk
- Highland Research and Development Institute (Public Organization), Chiang Mai 50200, Thailand; (A.W.); (P.Y.)
| | - Wannaree Charoensup
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai 50200, Thailand; (S.C.); (W.C.)
| | - Seewaboon Sireeratawong
- Clinical Research Center for Food and Herbal Product Trials and Development (CR-FAH), Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; (W.T.); (S.S.); (S.I.)
- Department of Pharmacology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
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de Lima E Souza Mesquita GC, Da Cruz ER, Corrêa DS, de Barros Falcão Ferraz A, Miri JM, Farias IV, Reginatto FH, Boaretto FBM, Dos Santos DM, da Silva J, Grivicich I, Picada JN. Genotoxic and antiproliferative properties of Endopleura uchi bark aqueous extract. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2024; 87:516-531. [PMID: 38619152 DOI: 10.1080/15287394.2024.2340069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
The bark extract from Endopleura uchi has been widely used in traditional medicine to treat gynecological-related disorders, diabetes, and dyslipidemias albeit without scientific proof. In addition, E. uchi bark extract safety, especially regarding mutagenic activities, is not known. The aim of this study was to determine the chemical composition, antitumor, and toxicological parameters attributed to an E. uchi bark aqueous extract. The phytochemical constitution was assessed by colorimetric and chromatographic analyzes. The antiproliferative effect was determined using sulforhodamine B (SRB) assay using 4 cancer cell lines. Cytotoxic and genotoxic activities were assessed utilizing MTT and comet assays, respectively, while mutagenicity was determined through micronucleus and Salmonella/microsome assays. The chromatographic analysis detected predominantly the presence of gallic acid and isoquercitrin. The antiproliferative effect was more pronounced in human colon adenocarcinoma (HT-29) and human breast cancer (MCF-7) cell lines. In the MTT assay, the extract presented an IC50 = 39.1 µg/ml and exhibited genotoxic (comet assay) and mutagenic (micronucleus test) activities at 20 and 40 µg/ml in mouse fibroblast cell line (L929) and mutagenicity in the TA102 and TA97a strains in the absence of S9 mix. Data demonstrated that E. uchi bark possesses bioactive compounds which exert cytotoxic and genotoxic effects that might be associated with its antitumor potential. Therefore, E. uchi bark aqueous extract consumption needs to be approached with caution in therapeutic applications.
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Affiliation(s)
| | - Elkejer Ribeiro Da Cruz
- Laboratory of Genetic Toxicology, Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
- Center for Research in Product and Development (CEPPED), Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
| | - Dione Silva Corrêa
- Center for Research in Product and Development (CEPPED), Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
| | - Alexandre de Barros Falcão Ferraz
- Pharmacognosy Laboratory, Department of Industrial Pharmaceutical, Health Sciences Center, Federal University of Santa Maria (UFSM), Santa Maria, RS, Brazil
| | - Jéssica Machado Miri
- Laboratory of Cancer Biology, Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
| | - Ingrid Vicente Farias
- Pharmacognosy Laboratory, Department of Pharmaceutical Sciences, Health Sciences Center, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil
| | - Flávio Henrique Reginatto
- Pharmacognosy Laboratory, Department of Pharmaceutical Sciences, Health Sciences Center, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil
| | | | - Duani Maria Dos Santos
- Laboratory of Genetic Toxicology, Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
| | - Juliana da Silva
- Laboratory of Genetic Toxicology, Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
- Laboratory of Genetics Toxicology, La Salle University, Canoas, RS, Brazil
| | - Ivana Grivicich
- Laboratory of Cancer Biology, Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
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17
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Mitchell ES, Lemke S, Woodhead B, Coleman D. Oral subchronic toxicity study and genetic toxicity evaluation of mitoquinone mesylate. J Appl Toxicol 2024. [PMID: 38860421 DOI: 10.1002/jat.4654] [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: 05/02/2024] [Revised: 05/20/2024] [Accepted: 05/22/2024] [Indexed: 06/12/2024]
Abstract
Mitochondrial dysfunction and excessive reactive oxygen species production contributes to the pathophysiology of aging. Coenzyme Q10 is thought to protect mitochondria from oxidative damage; thus, mitoquinone was developed as mitochondria-targeted analogue with similar antioxidant activity. Mitoquinone is the oxidized form of mitoquinol. Mitoquinone/mitoquinol mesylate has been proposed as a food ingredient. As part of the safety analysis, we performed genotoxicity assays and a 39-week toxicity study to determine overall toxicity potential. Mitoquinone mesylate showed no evidence of genotoxic potential in two in vitro assays, bacterial reverse mutation and human lymphocyte chromosome aberration, nor in the in vivo micronucleus test in rats. In the 39-week study in dogs, there were no findings observed, which were considered to represent adverse systemic toxicity; therefore, the high dose level (40 mg/kg/day) was considered the NOAEL. The principal findings in this study were fecal disturbances and vomiting. These findings were considered to be due to a local, possibly irritant effect of the test substance on the gastrointestinal tract and were not considered adverse as there were no impacts on clinical or histopathology. This highest dose exceeds the expected daily human intake more than 100-fold. Data from well-designed clinical trials actively collecting safety endpoints corroborate that 20 mg/day can be safely consumed and is not likely to result in significant gastrointestinal complaints. These results support the conclusion that the use of mitoquinone/mitoquinol mesylate as a food ingredient is safe.
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Affiliation(s)
| | | | | | - David Coleman
- Labcorp Early Development Laboratories Ltd., Huntingdon, UK
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18
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Bertanza G, Abbà A, Alias C, Amatucci A, Binelli A, Castiglioni S, Fossati M, Cruzeiro C, Torre CD, Domini M, Feretti D, Gilioli G, Magni S, Mazzoleni G, Menghini M, Pedrazzani R, Schroeder P, Simonetto A, Steimberg N, Ventura V, Vezzoli S, Zerbini I. To spread or not to spread? Assessing the suitability of sewage sludge and other biogenic wastes for agriculture reuse. MethodsX 2024; 12:102599. [PMID: 38379723 PMCID: PMC10876616 DOI: 10.1016/j.mex.2024.102599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Accepted: 02/02/2024] [Indexed: 02/22/2024] Open
Abstract
Sewage sludge (biosolids) management represents a worldwide issue. Due to its valuable properties, approximately one half of the EU production is recovered in agriculture. Nevertheless, growing attention is given to potential negative effects deriving from the presence of harmful pollutants. It is recognized that a (even very detailed) chemical characterization is not able to predict ecotoxicity of a mixture. However, this can be directly measured by bioassays. Actually, the choice of the most suitable tests is still under debate. This paper presents a multilevel characterization protocol of sewage sludge and other organic residues, based on bioassays and chemical-physical-microbiological analyses. The detailed description of the experimental procedure includes all the involved steps: the criteria for selecting the organic matrices to be tested and compared; the sample pre-treatment required before the analyses execution; the chemical, physical and microbiological characterisation; the bioassays, grouped in three classes (baseline toxicity; specific mode of action; reactive mode of action); data processing. The novelty of this paper lies in the integrated use of advanced tools, and is based on three pillars:•the direct ecosafety assessment of the matrices to be reused.•the adoption of innovative bioassays and analytical procedures.•the original criteria for data normalization and processing.
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Affiliation(s)
- Giorgio Bertanza
- Dipartimento di Ingegneria Civile, Architettura, Territorio e Ambiente e di Matematica, Università degli Studi di Brescia. Via Branze 43, Brescia I-25123, Italy
- MISTRAL, Centro Interuniversitario di Ricerca, Milano Bicocca e Verona “Modelli Integrati di Studio per la Tutela della Salute e la Prevenzione negli Ambienti di Vita e di Lavoro”, Università di Brescia, Italy
| | - Alessandro Abbà
- Dipartimento di Ingegneria Civile, Architettura, Territorio e Ambiente e di Matematica, Università degli Studi di Brescia. Via Branze 43, Brescia I-25123, Italy
| | - Carlotta Alias
- Dipartimento di Specialità Medico-Chirurgiche, Scienze Radiologiche e Sanità Pubblica, Università degli Studi di Brescia, Viale Europa 11, Brescia I-25123, Italy
| | - Achille Amatucci
- Dipartimento di Ingegneria Civile, Architettura, Territorio e Ambiente e di Matematica, Università degli Studi di Brescia. Via Branze 43, Brescia I-25123, Italy
| | - Andrea Binelli
- Dipartimento di Bioscienze, Università degli Studi di Milano, Via Celoria 26, Milano I-20133, Italy
| | - Sara Castiglioni
- Dipartimento Ambiente e Salute, Istituto di Ricerche Farmacologiche Mario Negri, IRCCS. Via Mario Negri 2, Milano I-20156, Italy
| | - Marco Fossati
- Dipartimento Ambiente e Salute, Istituto di Ricerche Farmacologiche Mario Negri, IRCCS. Via Mario Negri 2, Milano I-20156, Italy
| | - Catarina Cruzeiro
- Helmholtz Zentrum München – Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH), Ingolstädter Landstraße 1, Neuherberg D-85764, Germany
| | - Camilla Della Torre
- Dipartimento di Bioscienze, Università degli Studi di Milano, Via Celoria 26, Milano I-20133, Italy
| | - Marta Domini
- Dipartimento di Ingegneria Civile, Architettura, Territorio e Ambiente e di Matematica, Università degli Studi di Brescia. Via Branze 43, Brescia I-25123, Italy
| | - Donatella Feretti
- MISTRAL, Centro Interuniversitario di Ricerca, Milano Bicocca e Verona “Modelli Integrati di Studio per la Tutela della Salute e la Prevenzione negli Ambienti di Vita e di Lavoro”, Università di Brescia, Italy
- Dipartimento di Specialità Medico-Chirurgiche, Scienze Radiologiche e Sanità Pubblica, Università degli Studi di Brescia, Viale Europa 11, Brescia I-25123, Italy
| | - Gianni Gilioli
- Dipartimento di Ingegneria Civile, Architettura, Territorio e Ambiente e di Matematica, Università degli Studi di Brescia. Via Branze 43, Brescia I-25123, Italy
| | - Stefano Magni
- Dipartimento di Bioscienze, Università degli Studi di Milano, Via Celoria 26, Milano I-20133, Italy
| | - Giovanna Mazzoleni
- MISTRAL, Centro Interuniversitario di Ricerca, Milano Bicocca e Verona “Modelli Integrati di Studio per la Tutela della Salute e la Prevenzione negli Ambienti di Vita e di Lavoro”, Università di Brescia, Italy
- Dipartimento di Scienze Cliniche e Sperimentali, Università degli Studi di Brescia. Viale Europa 11, Brescia I-25123, Italy
| | - Michele Menghini
- Dipartimento di Ingegneria Meccanica e Industriale, Università degli Studi di Brescia. Via Branze 38, Brescia I-25123, Italy
| | - Roberta Pedrazzani
- MISTRAL, Centro Interuniversitario di Ricerca, Milano Bicocca e Verona “Modelli Integrati di Studio per la Tutela della Salute e la Prevenzione negli Ambienti di Vita e di Lavoro”, Università di Brescia, Italy
- Dipartimento di Ingegneria Meccanica e Industriale, Università degli Studi di Brescia. Via Branze 38, Brescia I-25123, Italy
| | - Peter Schroeder
- Helmholtz Zentrum München – Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH), Ingolstädter Landstraße 1, Neuherberg D-85764, Germany
| | - Anna Simonetto
- Dipartimento di Ingegneria Civile, Architettura, Territorio e Ambiente e di Matematica, Università degli Studi di Brescia. Via Branze 43, Brescia I-25123, Italy
| | - Nathalie Steimberg
- Dipartimento di Scienze Cliniche e Sperimentali, Università degli Studi di Brescia. Viale Europa 11, Brescia I-25123, Italy
| | - Vera Ventura
- Dipartimento di Ingegneria Civile, Architettura, Territorio e Ambiente e di Matematica, Università degli Studi di Brescia. Via Branze 43, Brescia I-25123, Italy
| | - Simona Vezzoli
- Dipartimento di Ingegneria Civile, Architettura, Territorio e Ambiente e di Matematica, Università degli Studi di Brescia. Via Branze 43, Brescia I-25123, Italy
| | - Ilaria Zerbini
- Dipartimento di Specialità Medico-Chirurgiche, Scienze Radiologiche e Sanità Pubblica, Università degli Studi di Brescia, Viale Europa 11, Brescia I-25123, Italy
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Wend K, Zorrilla L, Freimoser FM, Gallet A. Microbial pesticides - challenges and future perspectives for testing and safety assessment with respect to human health. Environ Health 2024; 23:49. [PMID: 38811948 PMCID: PMC11134743 DOI: 10.1186/s12940-024-01090-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 05/10/2024] [Indexed: 05/31/2024]
Abstract
Plant protection measures are necessary to prevent pests and diseases from attacking and destroying crop plants and to meet consumer demands for agricultural produce. In the last decades the use of chemical pesticides has largely increased. Farmers are looking for alternatives. Biopesticides should be considered a sustainable solution. They may be less toxic than chemical pesticides, be very specific to the target pest, decompose quickly, and be less likely to cause resistance. On the other hand, lower efficacy and higher costs are two disadvantages of many biopesticides. Biopesticides include macroorganisms, natural compounds and microorganisms. Microbial pesticides are the most widely used and studied class of biopesticides. The greatest difference between microbial and chemical pesticides is the ability of the former to potentially multiply in the environment and on the crop plant after application. The data requirements for the European Union and the United States Environmental Protection Agency are highlighted, as these regulatory processes are the most followed in regions where local regulations for biopesticide products are not available or vague. New Approach Methods already proposed or harmonized for chemical pesticides are presented and discussed with respect to their use in evaluating microbial pesticide formulations. Evaluating the microbials themselves is not as simple as using the same validated New Approach Methods as for synthetic pesticides. Therefore, the authors suggest considering New Approach Method strategies specifically for microbials and global harmonization with acceptability with the advancements of such approaches. Further discussion is needed and greatly appreciated by the experts.
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Affiliation(s)
- K Wend
- German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, Berlin, 10589, Germany.
| | - L Zorrilla
- Bayer Crop Science, 700 Chesterfield Parkway West, Chesterfield, MO, 63017, USA
| | - F M Freimoser
- Agroscope, Research Division Plant Protection, Route de Duillier 60, Nyon 1, 1260, Switzerland
| | - A Gallet
- Université Côte d'Azur, CNRS, INRAE, ISA, Sophia-Antipolis, 06903, France
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20
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Min SE, Gu EY, Jung J, Back SM, Kim W, Min BS, Kim YB, Han KH. Evaluating the toxicity of the roots of Asarum heterotropoides var. mandshuricum extracted using the decoction method: Genotoxicity, single-dose toxicity, and 13-week repeated-dose toxicity studies. JOURNAL OF ETHNOPHARMACOLOGY 2024; 325:117783. [PMID: 38246480 DOI: 10.1016/j.jep.2024.117783] [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: 12/05/2023] [Revised: 01/12/2024] [Accepted: 01/15/2024] [Indexed: 01/23/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The roots of Asarum heterotropoides F. Maekawa var. mandshuricum F. Maekawa (AR) is a traditional herbal medicine used across Asia, including Korea, China, and Japan. AR exhibits a range of biological activities, such as anti-inflammatory, anti-cancer, cold treatment, and anti-nociceptive effects. Various extraction methods, including decoction, which utilizes traditional knowledge and techniques. The AR decoction extract expected to contain fewer toxicants and have reduced toxicity due to the use of hot water in the extraction process. However, scientific evidence on the toxicity of AR decoction extracts is lacking, necessitating further studies for safe usage. AIM OF THE STUDY This study aimed to evaluate the genotoxicity and toxicity of single and repeated administration of AR decoction extracts. MATERIALS AND METHODS The genotoxicity was assessed using a bacterial reverse mutation (Ames test), an in vitro mammalian chromosome aberration test (CA test), and an in vivo micronucleus test (MN test) in Sprague-Dawley (SD) rats. The general toxicity was evaluated through single-dose and 13-week repeated-dose toxicity studies. In the single-dose toxicity study, 40 SD rats were orally administered AR decoction extract at doses of 1000, 2000, and 5000 mg/kg. In the 13-week repeated-dose toxicity study, 140 SD rats received daily oral doses of 0, 250, 500, 1000, 2000, and 5000 mg/kg of AR decoction extract. RESULTS The genotoxicity tests revealed that AR decoction extract was not genotoxic. The single-dose toxicity study showed no changes in body weight, clinical pathology, or macroscopic findings, with the approximate lethal dose (ALD) exceeding 5000 mg/kg. The 13-week repeated-dose toxicity study demonstrated no treatment-related changes in body weight, general symptoms, hematology, clinical chemistry, or urinalysis. Histopathological findings revealed hyperplasia of squamous cells in the forestomach after AR decoction extract administration, a treatment-related effect that resolved during the recovery period. The no observed adverse effect level (NOAEL) for both male and female rats was estimated to be 2000 mg/kg. CONCLUSIONS This study establishes the non-toxic dose of AR decoction extract, providing a foundation for further non-clinical and clinical evaluations AR safety.
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Affiliation(s)
- Seung Eui Min
- Human and Environmental Toxicology, Korea National University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon, 34113, Republic of Korea; Department of Advanced Toxicology Research, Korea Institute of Toxicology, 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea.
| | - Eun-Young Gu
- Department of Advanced Toxicology Research, Korea Institute of Toxicology, 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea.
| | - Jina Jung
- Carbon Neutrality & Chemical Regulatory Compliance Division, Korea Testing & Research Institute, 98, Gyoyukwon-ro, Gwacheon-si, Gyeonggido, 13810, Republic of Korea.
| | - Seng-Min Back
- Department of Advanced Toxicology Research, Korea Institute of Toxicology, 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea.
| | - Woojin Kim
- Department of Advanced Toxicology Research, Korea Institute of Toxicology, 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea.
| | - Byung Sun Min
- College of Pharmacy, Daegu Catholic University, Gyeongsan, Gyeongbuk, 38430, Republic of Korea.
| | - Yong-Bum Kim
- Department of Advanced Toxicology Research, Korea Institute of Toxicology, 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea.
| | - Kang-Hyun Han
- Human and Environmental Toxicology, Korea National University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon, 34113, Republic of Korea; Department of Advanced Toxicology Research, Korea Institute of Toxicology, 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea.
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21
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Singh H, Singh H, Sharma S, Kaur H, Kaur A, Kaur S, Kaur S, Sahajpal NS, Chaubey A, Shahtaghi NR, Kaur I, Jain SK. Genotoxic and mutagenic potential of 7-methylxanthine: an investigational drug molecule for the treatment of myopia. Drug Chem Toxicol 2024; 47:264-273. [PMID: 36594462 DOI: 10.1080/01480545.2022.2164011] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 12/14/2022] [Accepted: 12/26/2022] [Indexed: 01/04/2023]
Abstract
7-Methylxanthine (7-MX, CAS No. 552-62-5, purity 99.46%) is the first orally administered drug candidate, which showed anti-myopic activity in different pre-clinical studies. In the present study, we investigated the in-vivo genotoxic and mutagenic toxicity of 7-MX in Wistar rats using comet/single-cell gel electrophoresis, chromosomal aberration and micronucleus assays after oral administration. For the single-dose study (72 h), two doses of 7-MX 300 and 2000 mg/kg body weight were selected. For a repeated dose 28 d study, three doses (250, 500, and 1000 mg/kg) of 7-MX were selected. The doses were administered via oral gavage in the suspension form. Blood and major vital organs such as bone marrow, lung and liver were used to perform comet/single cell gel electrophoresis, chromosomal aberration, and micronucleus assays. The in-vitro Ames test was performed on TA98 and TA100 strains. In the chromosomal aberration study, a non-significant increase in deformities such as stickiness, ring chromosome, and endoreduplication was observed in bone marrow cells of 7-MX treated groups. These chromosomal alterations were observed upon treatment with doses of 2000 mg/kg single dose for 72 h and 1000 mg/kg repeated dose for 28 d. At a dose of 500 mg/kg, DNA damage in terms of tail length, tail moment, % tail DNA and the olive tail moment was also found to be non-significant in 7-MX treated groups. The Ames test showed the non-mutagenic nature of 7-MX in both strains of TA98 and TA100 of Salmonella typhimurium with or without metabolic activation. Thus, the present work is interesting in view of the non- genotoxicity and non-mutagenicity of repeated doses of 7-MX.
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Affiliation(s)
- Harjeet Singh
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, India
- Department of Pharmacy, Government Polytechnic College, Amritsar, India
| | - Harmanpreet Singh
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, India
- Department of Pathology, Augusta University, Georgia, USA
| | - Sunil Sharma
- Department of Zoology, Guru Nanak Dev University, Amritsar, India
| | - Harmanpreet Kaur
- Department of Zoology, Guru Nanak Dev University, Amritsar, India
| | - Arvinder Kaur
- Department of Zoology, Guru Nanak Dev University, Amritsar, India
| | - Satwinderjeet Kaur
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar India
| | - Sandeep Kaur
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar India
| | - Nikhil Shri Sahajpal
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, India
- Department of Pathology, Augusta University, Georgia, USA
| | - Alka Chaubey
- Department of Molecular Genetics, Bionano Genomics Inc., San Diego, CA, USA
| | - Navid Reza Shahtaghi
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, India
| | - Inderjeet Kaur
- Department of Ophthalmology, Baba Farid University of Health Sciences, Faridkot, India
| | - Subheet Kumar Jain
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, India
- Center for Basic and Translational Research in Health Science, Guru Nanak Dev University, Amritsar, India
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Scharf RM, Gonçalves CO, da Silva Fernandes A, Mazzei JL, Raquel Anastácio Ferraz E, Fernando Araujo Lima C, Felzenszwalb I. Antimutagenic and antitumor activities of a water-soluble fraction of soursop ( syn Graviola, Annona muricata L.) fruit pulp. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2024; 87:310-324. [PMID: 38285000 DOI: 10.1080/15287394.2024.2309335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
Soursop (Annona muricata) is a tropical tree whose decoction derived from bark, root, seed, or leaf has been used for medicinal uses. In addition, the fruit itself is considered a food, and the juice is utilized to treat heart and liver diseases. The aim of this study was to determine the phenolic content. In addition, a water-soluble fraction of the soursop fruit pulp (WSSP) was examined for the following properties: antioxidant, mutagenic, and antimutagenicity. UV-visible spectrophotometry determined total phenolic content by the Folin-Ciocalteu method to be 11.22 ± 0.6 mg of gallic acid equivalent per gram dried extract, and free-radical scavenging activity by the 2,2'-diphenyl-1-picryl-hydrazyl (DPPH•) showed an EC50 of 1032 µg/ml. In the Salmonella/microsome assay, no marked mutagenicity was induced following WSSP treatment, and a chemopreventive capacity was observed in the antimutagenic assay. The cytotoxicity assays were carried out using the water-soluble tetrazolium salt and lactate dehydrogenase (LDH) assays demonstrated that WSSP induced significant cytotoxicity in MCF-7 and Caco-2 cells, indicating greater effectiveness of cytotoxic action by destroying cell membrane integrity. Data suggest that WSSP may exert beneficial effects as a DNA chemopreventive and antitumor agent.
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Affiliation(s)
- Raissa Miranda Scharf
- Laboratory of Environmental Mutagenesis, Department of Biophysics and Biometry, University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Carine Oliveira Gonçalves
- Laboratory of Environmental Mutagenesis, Department of Biophysics and Biometry, University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Andreia da Silva Fernandes
- Laboratory of Environmental Mutagenesis, Department of Biophysics and Biometry, University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | - José Luiz Mazzei
- Department of Natural Products, Institute of Drug Technology, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Elisa Raquel Anastácio Ferraz
- Laboratory of Toxicology, Department of Pharmacy and Pharmaceutical Administration, Pharmacy College, Fluminense Federal University, Niterói, Brazil
| | - Carlos Fernando Araujo Lima
- Laboratory of Environmental Mutagenesis, Department of Biophysics and Biometry, University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
- Laboratory of Pharmaceutical and Technological Innovation, Molecular and Cell Biology Graduate Program, Federal University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Israel Felzenszwalb
- Laboratory of Environmental Mutagenesis, Department of Biophysics and Biometry, University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
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23
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Carrão Dantas EK, Ferreira CLS, da Cunha Goldstein A, da Silva Fernandes A, Anastacio Ferraz ER, Felzenszwalb I, Araújo-Lima CF. Marketable 1,3-dimethylamylamine and caffeine-based thermogenic supplements: Regulatory genotoxicity assessment through in vitro and in silico approaches. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2024; 87:245-265. [PMID: 38115604 DOI: 10.1080/15287394.2023.2294925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
The consumption of dietary supplements to enhance physical performance has increased significantly in the last century, especially thermogenic pre-workout supplements. Nevertheless, this industry has faced criticism for inadequate safety measures surveillance in regulatory issues regarding their products. The aims of our study were to investigate two pre-workout supplements with respect to (1) mutagenicity utilizing Salmonella/microsome assay; (2) genotoxicity employing cytokinesis-block micronucleus (CBMN) assay protocols; and (3) hepatocytoxicity using WST cell proliferation, activities of lactate dehydrogenase (LDH) and alkaline phosphatase using human liver carcinoma (HepG2) and mouse fibroblast (F C3H) cells. Oxidative stress was determined through glutathione (GSH) measurement and in silico for predictions of pharmacokinetics and toxicity for the most abundant isolated substances present in these supplements. Both supplements induced mutagenicity in all examined bacterial strains, especially in the presence of exogenous metabolism. Further, tested supplements significantly elevated the formation of micronuclei (MN) as well as other cellular phenomena. Concentration- and time-dependent curves were observed for hepatotoxicity in both studied cell lines. In addition, both supplements decreased levels of intracellular and extracellular GSH. In silico predictions showed that the isolated individual compounds failed to induce the observed outcomes. Our findings provide contributions to the molecular mechanisms underlying two pre-workout supplement-induced toxicity and the need for surveillance.
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Affiliation(s)
- Eduardo Kennedy Carrão Dantas
- Laboratory of Environmental Mutagenicity, Department of Biophysics and Biometry, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Caroline Lopes Simões Ferreira
- Laboratory of Environmental Mutagenicity, Department of Biophysics and Biometry, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Alana da Cunha Goldstein
- Laboratory of Environmental Mutagenicity, Department of Biophysics and Biometry, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Andreia da Silva Fernandes
- Laboratory of Environmental Mutagenicity, Department of Biophysics and Biometry, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | | | - Israel Felzenszwalb
- Laboratory of Environmental Mutagenicity, Department of Biophysics and Biometry, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Carlos Fernando Araújo-Lima
- Laboratory of Environmental Mutagenicity, Department of Biophysics and Biometry, Rio de Janeiro State University, Rio de Janeiro, Brazil
- Department of Genetics and Molecular Biology, Federal University of Rio de Janeiro State, Rio de Janeiro, Brazil
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24
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Fernandes AS, de Melo Bisneto AV, Silva LS, Flávia Luiz Cardoso Bailão E, Cardoso CG, Carneiro CC, da Costa Santos S, Chen-Chen L. Tellimagrandin-I and camptothin a exhibit chemopreventive effects in Salmonella enterica serovar Typhimurium strains and human lymphocytes. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2024; 87:185-198. [PMID: 38073488 DOI: 10.1080/15287394.2023.2290641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
Tellimagrandin-I (TL) and camptothin A (CA) are ellagitannins widely found in diverse plant species. Numerous studies demonstrated their significant biological activities, which include antitumor, antioxidant, and hepatoprotective properties. Despite this protective profile, the effects of TL and CA on DNA have not been comprehensively investigated. Thus, the aim of this study was to determine the mutagenic and antimutagenic effects attributed to TL and CA exposure on Salmonella enterica serovar Typhimurium strains using the Ames test. In addition, the cytotoxic and genotoxic effects were examined on human lymphocytes, employing both trypan blue exclusion and CometChip assay. The antigenotoxic effect was determined following TL and CA exposure in the presence of co-treatment with doxorubicin (DXR). Our results from the Ames test indicated that TL or CA did not display marked mutagenic activity. However, TL or CA demonstrated an ability to protect DNA against the damaging effects of the mutagens 4-nitroquinoline-1-oxide and sodium azide, thereby exhibiting antimutagenic properties. In relation to human lymphocytes, TL or CA did not induce significant cytotoxic or genotoxic actions on these cells. Further, these ellagitannins exhibited an ability to protect DNA from damage induced by DOX during co-treatment, indicating their potential beneficial usefulness as antigenotoxic agents. In conclusion, the protective effects of TL or CA against mutagens, coupled with their absence of genotoxic and cytotoxic effects on human lymphocytes, emphasize their potential therapeutic value in chemopreventive strategies.
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Affiliation(s)
- Amanda Silva Fernandes
- Laboratory of Radiobiology and Mutagenesis, Institute of Biological Sciences, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Abel Vieira de Melo Bisneto
- Laboratory of Radiobiology and Mutagenesis, Institute of Biological Sciences, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Luana Santos Silva
- Laboratory of Radiobiology and Mutagenesis, Institute of Biological Sciences, Federal University of Goiás, Goiânia, Goiás, Brazil
| | | | - Clever Gomes Cardoso
- Laboratory of Radiobiology and Mutagenesis, Institute of Biological Sciences, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Cristiene Costa Carneiro
- Laboratory of Radiobiology and Mutagenesis, Institute of Biological Sciences, Federal University of Goiás, Goiânia, Goiás, Brazil
| | | | - Lee Chen-Chen
- Laboratory of Radiobiology and Mutagenesis, Institute of Biological Sciences, Federal University of Goiás, Goiânia, Goiás, Brazil
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25
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Plascencia-Jatomea M, Cortez-Rocha MO, Rodríguez-Félix F, Mouriño-Pérez RR, Lizardi-Mendoza J, Sánchez-Maríñez RI, López-Meneses AK. Synthesis and toxicological study of chitosan-pirul (Schinus molle L.) essential oil nanoparticles on Aspergillus flavus. Arch Microbiol 2024; 206:133. [PMID: 38430254 DOI: 10.1007/s00203-024-03859-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 01/18/2024] [Accepted: 01/22/2024] [Indexed: 03/03/2024]
Abstract
In recent years, the study of essential oils as antifungal alternatives and their encapsulation to increase their properties for greater effects has been tested. In this work, nanoparticles of chitosan-Schinus molle L. essential oil (CS-PEO-Np) with a size of 260 ± 31.1 nm were obtained by ionic gelation and evaluated in some growth phases of Aspergillus flavus, a toxigenic fungus. At a concentration of 250 μg/mL of CS-PEO-Np, the A. flavus mycelial growth was inhibited at 97.1% with respect to control, at 96 h of incubation; the germination and viability of spores were inhibited at 74.8 and 40%, respectively, after exposure to 500 μg/mL of these nanomaterials, at 12 h of incubation. The fluorescence images of stained spores with DAPI showed the affectations caused by nanoparticles in the cell membrane, vacuoles and vacuolar content, cell wall, and nucleic acids. For both nanoparticles, CS-Np and CS-PEO-Np, no mutagenic effect was observed in Salmonella Typhimurium; also, the phytotoxic assay showed low-to-moderate toxicity toward seeds, which was dependent on the nanoparticle's concentration. The acute toxicity of CS-PEO-Np to A. salina nauplii was considered low in comparison to CS-Np (control), which indicates that the incorporation of Schinus molle essential oil into nanoparticles of chitosan is a strategy to reduce the toxicity commonly associated with nanostructured materials. The nanoparticulated systems of CS-PEO-Np represent an effective and non-toxic alternative for the control of toxigenic fungi such as A. flavus by delaying the initial growth stage.
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Affiliation(s)
- Maribel Plascencia-Jatomea
- Departamento de Investigación y Posgrado en Alimentos (DIPA), Universidad de Sonora, Hermosillo, Sonora, C.P. 83000, México
| | - Mario Onofre Cortez-Rocha
- Departamento de Investigación y Posgrado en Alimentos (DIPA), Universidad de Sonora, Hermosillo, Sonora, C.P. 83000, México
| | - Francisco Rodríguez-Félix
- Departamento de Investigación y Posgrado en Alimentos (DIPA), Universidad de Sonora, Hermosillo, Sonora, C.P. 83000, México
| | - Rosa Reyna Mouriño-Pérez
- Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Ensenada, Baja California, C.P. 22860, México
| | - Jaime Lizardi-Mendoza
- Centro de Investigación en Alimentación y Desarrollo (CIAD, A.C.), Hermosillo, Sonora, C.P. 83304, México
| | | | - Ana Karenth López-Meneses
- Departamento de Investigación y Posgrado en Alimentos (DIPA), Universidad de Sonora, Hermosillo, Sonora, C.P. 83000, México.
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Baran MJ, Hof R, Groot A, Eurlings I, Gijsbrechts J, de Jong B, Wulff JE. Safety Evaluation of a Prototypical Diazirine-Based Covalent Crosslinker and Molecular Adhesive. Int J Toxicol 2024; 43:146-156. [PMID: 37987615 PMCID: PMC10916352 DOI: 10.1177/10915818231215692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
bis-Diazirine reagents are increasingly being used as polymer crosslinkers, adhesives, and photopatterning agents in the materials sciences literature, but little effort has been made thus far to document their chemical safety profile. Here, we describe the results of a detailed toxicity assessment of a representative bis-diazirine. Safety was evaluated by a series of in vitro assays, which found the product to be non-mutagenic in bacterial tester strains TA98 and TA100, non-corrosive and non-irritating to skin, and requiring no classification for eye irritation or serious damage. While in vitro tests do not capture the integrated whole animal system, and thus cannot completely rule out the possibility of adverse responses, the results of this study suggest a desirable safety profile for bis-diazirine reagents and provide a solid foundation upon which to add in vivo assessment of safety risk and dose-response studies.
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Affiliation(s)
| | - Rebecca Hof
- Department of Chemistry, University of Victoria, Victoria, BC, Canada
- Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, Victoria, BC, Canada
| | - Angelique Groot
- Charles River Laboratories Den Bosch BV, ‘s-Hertogenbosch, The Netherlands
| | - Irene Eurlings
- Charles River Laboratories Den Bosch BV, ‘s-Hertogenbosch, The Netherlands
| | - Jet Gijsbrechts
- Charles River Laboratories Den Bosch BV, ‘s-Hertogenbosch, The Netherlands
| | - Britt de Jong
- Charles River Laboratories Den Bosch BV, ‘s-Hertogenbosch, The Netherlands
| | - Jeremy E. Wulff
- Department of Chemistry, University of Victoria, Victoria, BC, Canada
- Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, Victoria, BC, Canada
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Pescke IK, de Oliveira Rozino L, Zenato K, Cardozo T, Flores WH, Vargas VMF. Lowering the pH leads to the disaggregation of NiO and ZnO nanoparticles and modifies the mutagenic response. J Appl Toxicol 2024; 44:445-454. [PMID: 37828814 DOI: 10.1002/jat.4553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/31/2023] [Accepted: 09/25/2023] [Indexed: 10/14/2023]
Abstract
In a changing environmental scenario, acid rain can have a significant impact on aquatic ecosystems. Acidification is known to produce corrosion in metals, hence increasing their harmful effects on the environment, organisms and human health. The prevalent use of metallic nanoparticles (NPs) in everyday products raises concerns regarding exposure and nanotoxicity even in these acidified conditions. We thus report on the cytotoxic and genotoxic potential of nickel oxide (NiO-NP) and zinc oxide (ZnO-NP) NPs when suspended in aqueous media in light of pH variations (7.5 and 5). A modified microsuspension method of the Salmonella/microsome assay was adopted, and strains (TA97a, TA98, TA100, TA102) were exposed to NPs (10-1280 μg/plate) with and without a metabolization fraction. The acidic condition favored disaggregation and caused a decrease in NPs size. Mutagenicity was observed in all samples and different strains, with greater DNA base pair substitution damage (TA100 and TA102), but extrinsic conditions (pH) suggest different action mechanisms of NiO-NP and ZnO-NP on genetic content. Mutagenic activity was found to increase upon metabolic activation (TA98, TA100, and TA102) demonstrating the bioactivity of NiO-NP and ZnO-NP in relation to metabolites generated by the mammalian p450 system in vitro. Modifications in the Salmonella assay methodology increased cell exposure time. The observed responses recommend this modified assay as one of the methodologies of choice for nanoecotoxicological evaluation. These findings emphasize the significance of incorporating the environmental context when evaluating the toxicity of metal-based NPs.
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Affiliation(s)
- Ismael Krüger Pescke
- Programa de Pós-Graduação em Ecologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
- Laboratório de Mutagênese Ambiental, Centro de Ecologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Lívia de Oliveira Rozino
- Programa de Pós-Graduação em Ecologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
- Laboratório de Mutagênese Ambiental, Centro de Ecologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Karoline Zenato
- Laboratório de Mutagênese Ambiental, Centro de Ecologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Tatiane Cardozo
- Grupo de Materiais Nanoestruturados, Universidade Federal do Pampa (UNIPAMPA), Bagé, Brazil
| | | | - Vera Maria Ferrão Vargas
- Programa de Pós-Graduação em Ecologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
- Laboratório de Mutagênese Ambiental, Centro de Ecologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
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Yusof YA, Azizul Hasan ZA, Abd Maurad Z. Mutagenicity Assessment of Homologous Series of Methyl Ester Sulphonates (MES) Using the Bacterial Reverse Mutation (Ames) Test. Int J Toxicol 2024; 43:157-164. [PMID: 38048784 DOI: 10.1177/10915818231217041] [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] [Indexed: 12/06/2023]
Abstract
Methyl ester sulphonate (MES) is an anionic surfactant that is suitable to be used as an active ingredient in household products. Four palm-based MES compounds with various carbon chains, namely C12, C14, C16 and C16/18 MES, were assayed by the in vitro bacterial reverse mutation (Ames) test in the Salmonella typhimurium strains TA98, TA100, TA1535, and TA1537 and the Escherichia coli strain WP2 uvrA, with the aim of establishing the safety data of the compounds, specifically their mutagenicity. The test was also carried out on linear alkylbenzene sulphonate (LAS) for comparison. The plate incorporation method was conducted according to the Organization for Economic Cooperation and Development (OECD) Test Guideline 471. All compounds were tested at five analysable non-cytotoxic concentrations, varying from .001 mg/plate to 5 mg/plate, with and without S-9 metabolic activation. All tested concentrations showed no significant increase in the number of revertant colonies compared to revertant colonies of the negative control. The Ames test indicated that each concentration of C12, C14, C16, C16/18 MES, and LAS used in this study induced neither base-pair substitutions nor frame-shift mutations in the S. typhimurium strains TA98, TA100, TA1535, and TA1537 and the E. coli strain WP2 uvrA. The results showed that C12, C14, C16 and C16/18 MES have no potential mutagenic properties in the presence and absence of S-9 metabolic activation, similarly to LAS. Therefore, the MES is safe to be used as an alternative to petroleum-based surfactants for household cleaning products.
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Vasilevich NI, Jiang H, Xiao H, Feng K, Jian C, Chen C, Li M, Chen Z, Pang L, Li X, Chestkov AV, Sun AH, Xu W, Fuselier JA, Coy DH, Sun L. Biological evaluation of 9-thioansamitocin P3. Biochem Biophys Res Commun 2024; 696:149483. [PMID: 38219484 DOI: 10.1016/j.bbrc.2024.149483] [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: 11/08/2023] [Revised: 12/27/2023] [Accepted: 01/04/2024] [Indexed: 01/16/2024]
Abstract
Highly cytotoxic maytansine derivatives are widely used in targeted tumor delivery. Structure-activity studies published earlier suggested the C9 carbinol to be a key element necessary to retain the potency. However, in 1984 a patent was published by Takeda in which the synthesis of 9-thioansamitocyn (AP3SH) was described and its activity in xenograft models was shown. In this article we summarize the results of an extended study of the anti-tumor properties of AP3SH. Like other maytansinoids, it induces apoptosis and arrests the cell cycle in the G2/M phase. It is metabolized in liver microsomes predominately by C3A4 isoform and doesn't inhibit any CYP isoforms except CYP3A4 (midazolam, IC50 7.84 μM). No hERG inhibition, CYP induction or mutagenicity in Ames tests were observed. AP3SH demonstrates high antiproliferative activity against 25 tumor cell lines and tumor growth inhibition in U937 xenograft model. Application of AP3SH as a cytotoxic payload in drug delivery system was demonstrated by us earlier.
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Affiliation(s)
- Natalya I Vasilevich
- Shenzhen Academy of Peptide Targeting Technology at Pingshan and Shenzhen Tyercan Bio-Pharm Co., Ltd, Shenzhen, Guangdong, 518118, China.
| | - Huangyu Jiang
- Shenzhen Academy of Peptide Targeting Technology at Pingshan and Shenzhen Tyercan Bio-Pharm Co., Ltd, Shenzhen, Guangdong, 518118, China
| | - Haihua Xiao
- Shenzhen Academy of Peptide Targeting Technology at Pingshan and Shenzhen Tyercan Bio-Pharm Co., Ltd, Shenzhen, Guangdong, 518118, China
| | - Kunxian Feng
- Shenzhen Academy of Peptide Targeting Technology at Pingshan and Shenzhen Tyercan Bio-Pharm Co., Ltd, Shenzhen, Guangdong, 518118, China
| | - Chengfang Jian
- Shenzhen Academy of Peptide Targeting Technology at Pingshan and Shenzhen Tyercan Bio-Pharm Co., Ltd, Shenzhen, Guangdong, 518118, China
| | - Changfeng Chen
- Shenzhen Academy of Peptide Targeting Technology at Pingshan and Shenzhen Tyercan Bio-Pharm Co., Ltd, Shenzhen, Guangdong, 518118, China
| | - Min Li
- Shenzhen Academy of Peptide Targeting Technology at Pingshan and Shenzhen Tyercan Bio-Pharm Co., Ltd, Shenzhen, Guangdong, 518118, China
| | - Zhenhua Chen
- Shenzhen Academy of Peptide Targeting Technology at Pingshan and Shenzhen Tyercan Bio-Pharm Co., Ltd, Shenzhen, Guangdong, 518118, China
| | - Li Pang
- Shenzhen Academy of Peptide Targeting Technology at Pingshan and Shenzhen Tyercan Bio-Pharm Co., Ltd, Shenzhen, Guangdong, 518118, China
| | - Xiang Li
- Shenzhen Academy of Peptide Targeting Technology at Pingshan and Shenzhen Tyercan Bio-Pharm Co., Ltd, Shenzhen, Guangdong, 518118, China
| | - Alexander V Chestkov
- Shenzhen Academy of Peptide Targeting Technology at Pingshan and Shenzhen Tyercan Bio-Pharm Co., Ltd, Shenzhen, Guangdong, 518118, China
| | - Andre H Sun
- Department of Pathology, Tulane University Health Sciences Center, Tulane Cancer Center, New Orleans, LA70112, USA
| | - Wang Xu
- Department of Pathology, Tulane University Health Sciences Center, Tulane Cancer Center, New Orleans, LA70112, USA
| | - Joseph A Fuselier
- Peptide Research Labs, Department of Medicine, Tulane University Health Sciences Center, New Orleans, LA70112, USA
| | - David H Coy
- Peptide Research Labs, Department of Medicine, Tulane University Health Sciences Center, New Orleans, LA70112, USA
| | - Lichun Sun
- Shenzhen Academy of Peptide Targeting Technology at Pingshan and Shenzhen Tyercan Bio-Pharm Co., Ltd, Shenzhen, Guangdong, 518118, China; Peptide Research Labs, Department of Medicine, Tulane University Health Sciences Center, New Orleans, LA70112, USA.
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30
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Cassola F, Ramírez N, Ribeiro G, da Silva LHD, Gambero A, de Oliveira ADSS, Vieira PMMDM, Nogueira FAR, Duarte MCT. Synergism Between Essential Oils and Evaluation of Their Activities with a Focus on Malassezia furfur Control. PLANTA MEDICA 2024; 90:111-125. [PMID: 37935353 DOI: 10.1055/a-2196-2087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2023]
Abstract
Seborrheic dermatitis is a chronic inflammatory disease caused by Malassezia yeast species that affects the regions of the body where the sebaceous glands are present. The combined use of different essential oils (EOs) can increase their spectrum of action. Thus, the present study aimed to evaluate the action of EOs alone and in combination with each other on M. furfur, in planktonic and biofilm form, and their anti-inflammatory and mutagenic potential, in addition to the effects on the viability of cells lines. Of the 40 evaluated EOs, 22 showed activity against M. furfur at 0.5 - 2.0 mg/mL concentrations. Among the most active species, a blend of essential oils (BEOs) composed of Cymbopogon martini (Roxb.) Will. Watson (MIC = 0.5 mg/mL) and Mentha × piperita L. (MIC = 1.0 mg/mL) was selected, which showed a synergistic effect against yeast when evaluated through the checkerboard assay. The fungicidal activity was maintained by the addition of anti-inflammatory oil from Varronia curassavica Jacq. to BEOs. The BEOs also showed activity in the inhibition of biofilm formation and in the eradication of the biofilm formed by M. furfur, being superior to the action of fluconazole. Furthermore, it did not show mutagenic potential and did not interfere with the cell viability of both evaluated cell lines (HaCaT and BMDMs). TNF-α levels were reduced only by C. martini; however, this property was maintained when evaluating BEOs. BEOs had no effect on IL-8 levels. Thus, the BEOs may be indicated for alternative treatments against seborrheic dermatitis.
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Affiliation(s)
- Fábio Cassola
- Faculty of Pharmaceutical Science, State University of Campinas, Campinas, Brazil
- Research Center of Chemical, Biological and Agriculture, Paulínia, Brazil
| | - Nedy Ramírez
- Faculty of Pharmaceutical Science, State University of Campinas, Campinas, Brazil
- Research Center of Chemical, Biological and Agriculture, Paulínia, Brazil
| | - Guilherme Ribeiro
- Institute of Biology, State University of Campinas, Campinas, Brazil
| | | | - Alessandra Gambero
- Life Sciences Center, Pontifical Catholic University of Campinas, Campinas, Brazil
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31
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Rodrigues VB, Menezes JM, da Silva LC, Müller I, Mallmann L, Hermann BS, Menezes C, Brucker N, da Vida RL, Picada JN, Boaretto FBM, Schneider A, Linden R, Zanella R, Fleck JD, Charão MF. Caenorhabditis elegans as a suitable model to evaluate the toxicity of water from Rolante River, southern Brazil. Toxicol Res (Camb) 2024; 13:tfad117. [PMID: 38178995 PMCID: PMC10762661 DOI: 10.1093/toxres/tfad117] [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: 05/04/2023] [Revised: 10/30/2023] [Accepted: 11/28/2023] [Indexed: 01/06/2024] Open
Abstract
Urbanization and agricultural activities increased environmental contaminants. Integrated analysis of water parameters and bioassays represents an essential approach to evaluating aquatic resource quality. This study aimed to assess water quality by microbiological and physicochemical parameters as well as the toxicological effects of water samples on the Ames test and Caenorhabditis elegans model. Samples were collected during (collection 1) and after (collection 2) pesticide application in the upper (S1), middle (S2), and lower (S3) sections of the Rolante River, southern Brazil. Metals were determined by GFAAS and pesticides by UPLC-MS/MS. Bioassays using the Ames test and the nematode C. elegans were performed. Levels of microbiological parameters, as well as Mn and Cu were higher than the maximum allowed limits established by legislation in collection 2 compared to collection 1. The presence of pesticide was observed in both collections; higher levels were found in collection 1. No mutagenic effect was detected. Significant inhibition of body length of C. elegans was found in collection 1 at S2 (P < 0.001) and S3 (P < 0.001) and in collection 2 at S2 (P = 0.004). Comparing the same sampling site between collections, a significant difference was found between the site of collection (F(3,6)=8.75, P = 0.01) and the time of collection (F(1,2)=28.61, P = 0.03), for the S2 and S3 samples. C. elegans model was useful for assessing surface water quality/toxicity. Results suggest that an integrated analysis for the surface water status could be beneficial for future approaches.
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Affiliation(s)
- Vinícius Bley Rodrigues
- Laboratory of Analytical Toxicology, Post-graduation in Toxicology and Toxicological Analysis, Feevale University, ERS 239, 2755, Vila Nova, Novo Hamburgo, RS 93352-000, Brazil
| | - Júlia Machado Menezes
- Laboratory of Analytical Toxicology, Post-graduation in Toxicology and Toxicological Analysis, Feevale University, ERS 239, 2755, Vila Nova, Novo Hamburgo, RS 93352-000, Brazil
| | - Laura Cé da Silva
- Laboratory of Analytical Toxicology, Post-graduation in Toxicology and Toxicological Analysis, Feevale University, ERS 239, 2755, Vila Nova, Novo Hamburgo, RS 93352-000, Brazil
| | - Isadora Müller
- Laboratory of Analytical Toxicology, Post-graduation in Toxicology and Toxicological Analysis, Feevale University, ERS 239, 2755, Vila Nova, Novo Hamburgo, RS 93352-000, Brazil
| | - Larissa Mallmann
- Laboratory of Molecular Microbiology, Post-graduation in Virology, Feevale University, ERS 239, 2755, Novo Hamburgo, RS 93352-000, Brazil
| | - Bruna Saraiva Hermann
- Laboratory of Molecular Microbiology, Post-graduation in Virology, Feevale University, ERS 239, 2755, Novo Hamburgo, RS 93352-000, Brazil
| | - Charlene Menezes
- Department of Industrial Pharmacy, Federal University of Santa Maria, Santa Maria, RS 97105-900, Brazil
| | - Natália Brucker
- Graduate Program in Pharmacology, Pharmacology Department, Federal University of Santa Maria, Santa Maria, RS 97105-900, Brazil
| | - Roselaine L da Vida
- Graduate Program in Pharmacology, Pharmacology Department, Federal University of Santa Maria, Santa Maria, RS 97105-900, Brazil
| | - Jaqueline Nascimento Picada
- Laboratory of Genetic Toxicology, PPGBioSaúde (Postgraduate Program in Cellular and Molecular Biology Applied to Health), Lutheran University of Brazil (ULBRA), Canoas, RS 92425-900, Brazil
| | - Fernanda Brião Menezes Boaretto
- Laboratory of Genetic Toxicology, PPGBioSaúde (Postgraduate Program in Cellular and Molecular Biology Applied to Health), Lutheran University of Brazil (ULBRA), Canoas, RS 92425-900, Brazil
| | - Anelise Schneider
- Laboratory of Analytical Toxicology, Post-graduation in Toxicology and Toxicological Analysis, Feevale University, ERS 239, 2755, Vila Nova, Novo Hamburgo, RS 93352-000, Brazil
| | - Rafael Linden
- Laboratory of Analytical Toxicology, Post-graduation in Toxicology and Toxicological Analysis, Feevale University, ERS 239, 2755, Vila Nova, Novo Hamburgo, RS 93352-000, Brazil
| | - Renato Zanella
- Pesticide Residue Analysis Laboratory (LARP), Chemistry Department, Analytical Chemistry Sector, Federal University of Santa Maria, Santa Maria, RS 97105-900, Brazil
| | - Juliane Deise Fleck
- Laboratory of Molecular Microbiology, Post-graduation in Virology, Feevale University, ERS 239, 2755, Novo Hamburgo, RS 93352-000, Brazil
| | - Mariele Feiffer Charão
- Laboratory of Analytical Toxicology, Post-graduation in Toxicology and Toxicological Analysis, Feevale University, ERS 239, 2755, Vila Nova, Novo Hamburgo, RS 93352-000, Brazil
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Kleijn AF, Mutter M, Akingbasote JA, Meetro J, Simon RR, Muntendam P, Frommhagen M, Schols HA. Toxicological evaluation of a pumpkin-derived pectin preparation: in vitro genotoxicity studies and a 13-week oral toxicity study in Sprague-Dawley rats. Toxicol Res (Camb) 2024; 13:tfae004. [PMID: 38274036 PMCID: PMC10807847 DOI: 10.1093/toxres/tfae004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 12/07/2023] [Accepted: 12/18/2023] [Indexed: 01/27/2024] Open
Abstract
The safety of a rhamnogalacturonan-I-enriched pectin extract (G3P-01) from pumpkin (Cucurbita moschata var. Dickinson) was evaluated for use as an ingredient in food and dietary supplements. G3P-01 was tested in a battery of genetic toxicity studies including reverse mutagenicity and in vitro micronucleus assay. In addition, Sprague-Dawley rats were randomized and orally dosed with G3P-01 incorporated in animal diet at concentrations of 0, 9000, 18,000, and 36,000 ppm daily for 13-weeks (n=10/sex/group) in line with OECD guidelines (TG 408). The results of the in vitro bacterial reverse mutation assay and micronucleus assay in TK6 cells demonstrated a lack of genotoxicity. The 13-week oral toxicity study in Sprague-Dawley rats demonstrated that the test article, G3P-01 was well tolerated; there were no mortalities and no adverse effects on clinical, gross pathology, hematology, blood chemistry, and histological evaluation of the essential organs of the animals. The present study demonstrates that G3P-01 is non-genotoxic and is safe when ingested in diet at concentrations up to 36, 000 ppm. The subchronic no-observed-adverse-effect level (NOAEL) for G3P-01 was concluded to be 36,000 ppm, equivalent to 1,899 and 2,361 mg/kg/day for male and female rats respectively.
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Affiliation(s)
- Anne F Kleijn
- Laboratory of Food Chemistry, Wageningen University and Research, Bornse Weilanden 9, Wageningen, WG 6708, The Netherlands
| | - Margien Mutter
- G3P Inc., 20 Mall Road Suite 220, Burlington, MA 01803, United States
| | - James A Akingbasote
- Intertek Health Sciences Inc., Food and Nutrition Group, 2233 Argentia Road, Suite 201, Mississauga, ON L5N 2X7, Canada
| | - Jwar Meetro
- Intertek Health Sciences Inc., Food and Nutrition Group, 2233 Argentia Road, Suite 201, Mississauga, ON L5N 2X7, Canada
| | - Ryan R Simon
- Intertek Health Sciences Inc., Food and Nutrition Group, 2233 Argentia Road, Suite 201, Mississauga, ON L5N 2X7, Canada
| | - Pieter Muntendam
- G3P Inc., 20 Mall Road Suite 220, Burlington, MA 01803, United States
| | - Matthias Frommhagen
- Société des Produits Nestlé SA, Nestlé Research, Route du Jorat 57, CH-1000, Lausanne 26, Switzerland
| | - Henk A Schols
- Laboratory of Food Chemistry, Wageningen University and Research, Bornse Weilanden 9, Wageningen, WG 6708, The Netherlands
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Encarnação S, Lima K, Malú Q, Caldeira GI, Duarte MP, Rocha J, Lima BS, Silva O. An Integrated Approach to the Anti-Inflammatory, Antioxidant, and Genotoxic Potential of Portuguese Traditional Preparations from the Bark of Anacardium occidentale L. PLANTS (BASEL, SWITZERLAND) 2024; 13:420. [PMID: 38337956 PMCID: PMC10857173 DOI: 10.3390/plants13030420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 01/21/2024] [Accepted: 01/29/2024] [Indexed: 02/12/2024]
Abstract
Anacardium occidentale L. stem bark Traditional Herbal Preparations (AoBTHPs) are widely used in traditional medicine to treat inflammatory conditions, such as diabetes. The present study aims to evaluate the anti-inflammatory, antioxidant, and genotoxic potential of red and white Portuguese AoBTHPs. Using a carrageenan-induced rat paw edema model, a significant anti-edema effect was observed for all tested doses of white AoBTHP (40.2, 71.5, and 127.0 mg/kg) and the two highest doses of red AoB THP (71.5 and 127.0 mg/kg). The anti-edema effect of red AoBTHP's highest dose was much more effective than indomethacin 10 mg/kg, Trolox 30 mg/kg, and Tempol 30 mg/kg. In DPPH, FRAP, and TAC using the phosphomolybdenum method, both types of AoBTHPs showed similar antioxidant activity and no genotoxicity up to 5000 µg/plate in the Ames test. The LC-UV/DAD-ESI/MS fingerprint allowed the identification of gallic and protocatechuic acids as the two main marker compounds and the presence of catechin, epicatechin, epigallocatechin gallate, and ellagic acid in both AoBTHPs. The obtained results support the validation of red and white AoB and their THPs as anti-inflammatory agents and contribute to the possible development of promising new therapeutic options to treat inflammatory conditions.
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Affiliation(s)
- Sofia Encarnação
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisbon, Portugal; (S.E.); (K.L.); (Q.M.); (G.I.C.); (J.R.); (B.S.L.)
| | - Katelene Lima
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisbon, Portugal; (S.E.); (K.L.); (Q.M.); (G.I.C.); (J.R.); (B.S.L.)
| | - Quintino Malú
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisbon, Portugal; (S.E.); (K.L.); (Q.M.); (G.I.C.); (J.R.); (B.S.L.)
| | - Gonçalo I. Caldeira
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisbon, Portugal; (S.E.); (K.L.); (Q.M.); (G.I.C.); (J.R.); (B.S.L.)
| | - Maria Paula Duarte
- MEtRICs/NOVA School of Science and Technology, Universidade NOVA de Lisboa, Campus de Caparica, 2829-516 Almada, Portugal;
| | - João Rocha
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisbon, Portugal; (S.E.); (K.L.); (Q.M.); (G.I.C.); (J.R.); (B.S.L.)
| | - Beatriz Silva Lima
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisbon, Portugal; (S.E.); (K.L.); (Q.M.); (G.I.C.); (J.R.); (B.S.L.)
| | - Olga Silva
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisbon, Portugal; (S.E.); (K.L.); (Q.M.); (G.I.C.); (J.R.); (B.S.L.)
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Ma X, Tian M, Yu X, Liu M, Li B, Ren D, Wang W. Characterization and Preliminary Safety Evaluation of Akkermansia muciniphila PROBIO. Foods 2024; 13:442. [PMID: 38338577 PMCID: PMC10855611 DOI: 10.3390/foods13030442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/22/2024] [Accepted: 01/25/2024] [Indexed: 02/12/2024] Open
Abstract
In addition to providing certain health advantages to the host, a bacterial strain must possess a clearly defined safety profile to be regarded as a probiotic. In this study, we present a thorough and methodical assessment of the safety of a novel strain of bacteria, Akkermansia muciniphila PROBIO, which was isolated from human feces. Firstly, we examined the strain's overall features, such as its gastrointestinal tolerance and its physiological and biochemical traits. Next, we verified its genotoxic properties through bacterial reverse mutation and in vitro mammalian cell micronucleus assays. The drug sensitivity of A. muciniphila PROBIO was subsequently examined through an analysis of its antibiotic resistance genes. Additionally, the toxicological impact was verified through acute and sub-chronic toxicity studies. A genome-based safety assessment was conducted to gain further insights into gene function, including potential virulence factors and pathogenic properties. Finally, we assessed whether moxifloxacin resistance in A. muciniphila PROBIO is transferred using in vitro conjugation experiments. A. muciniphila PROBIO exhibited superior gastrointestinal tolerance, with no observed hematological or histopathological abnormalities. Moreover, the outcomes pertaining to mutagenic, clastogenic, or toxic impacts were found to be negative, even at exceedingly high dosages. Moreover, no adverse effects associated with the test substance were observed during the examination of acute and sub-chronic toxicity. Consequently, it was plausible to estimate the no-observed-adverse-effect level (NOAEL) to be 6.4 × 1011 viable bacteria for an average individual weighing 70 kg. Additionally, only three potential drug resistance genes and one virulence factor gene were annotated. A. muciniphila PROBIO is naturally resistant to moxifloxacin, and resistance does not transfer. Collectively, the data presented herein substantiate the presumed safety of A. muciniphila PROBIO for its application in food.
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Affiliation(s)
- Xin Ma
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China; (X.M.); (X.Y.)
| | - Meng Tian
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China;
| | - Xueping Yu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China; (X.M.); (X.Y.)
| | - Ming Liu
- China National Research Institute of Food and Fermentation Industries, Beijing 100015, China; (M.L.); (B.L.)
| | - Bin Li
- China National Research Institute of Food and Fermentation Industries, Beijing 100015, China; (M.L.); (B.L.)
| | - Dayong Ren
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China;
| | - Wei Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China; (X.M.); (X.Y.)
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Mhlongo NL, Akharame MO, Pereao O, Human IS, Opeolu BO. Phenolic compounds occurrence and human health risk assessment in potable and treated waters in Western Cape, South Africa. FRONTIERS IN TOXICOLOGY 2024; 5:1269601. [PMID: 38239933 PMCID: PMC10794607 DOI: 10.3389/ftox.2023.1269601] [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: 07/30/2023] [Accepted: 11/28/2023] [Indexed: 01/22/2024] Open
Abstract
Phenolic pollutants from industrial and agricultural activities pose a major threat to the world's potable water supply. The persistent micro-pollutants often find their way into drinking water sources with possible adverse human health implications. In this study, bottled water, tap water, and wastewater treatment plant (WWTP) effluent samples from the Boland region of the Western Cape, South Africa were assessed to determine 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP) levels using HPLC/DAD instrumentation. The selected area is known for its vast agricultural ventures and wineries. Evaluation of the human health risk (cancer risk) for the pollutants was conducted using the hazard quotient (HQ). The Ames mutagenicity test was also conducted using the Salmonella typhimurium T98 and T100 strains and the S9 activation enzyme. Trace levels of the phenolics were detected in the samples with a range of 9.32 × 10-7-1.15 × 10-4 mg/L obtained for 4-CP, and 8.80 × 10-7-1.72 × 10-4 mg/L recorded for 2,4-DCP. Both compounds had levels below the limit of 0.01 mg/L prescribed by South African legislation. The assessed HQ for the phenolic concentrations indicates a low level of potential ecological risk and none of the samples had a cancer risk value that exceeded the regulatory limit. The possibility of the analyzed samples causing cancer is unlikely, but non-carcinogenic adverse effects were found. Strong mutagenicity was observed for the T98 strains with a potential ability to cause mutation toward the insertion or deletion of a nucleotide. The T100 bacterial strain showed very slight mutagenicity potential, however, it is unlikely to cause any mutation. The levels of phenolics in the potable water samples may pose a significant threat to human health. Hence, screening persistent organic chemicals in potable water sources and evaluating their potential human health effects is pertinent to prevent associated health challenges.
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Affiliation(s)
- Nkosiyenzile Londiwe Mhlongo
- Department of Environmental and Occupational Studies, Cape Peninsula University of Technology, Cape Town, South Africa
| | - Michael Ovbare Akharame
- Department of Environmental Management and Toxicology, University of Benin, Benin-City, Nigeria
| | - Omoniyi Pereao
- Department of Environmental and Occupational Studies, Cape Peninsula University of Technology, Cape Town, South Africa
| | - Izanne Susan Human
- Department of Environmental and Occupational Studies, Cape Peninsula University of Technology, Cape Town, South Africa
| | - Beatrice Olutoyin Opeolu
- Environmental Chemistry and Toxicology Research Group, Cape Peninsula University of Technology, Cape Town, South Africa
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Rossi S, Bussi S, Bonafè R, Incardona C, Vurro E, Visigalli M, Buonsanti F, Fretta R. Mutagenicity assessment of two potential impurities in preparations of 5-amino-2,4,6 triiodoisophthalic acid, a key intermediate in the synthesis of the iodinated contrast agent iopamidol. MUTATION RESEARCH. GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2024; 893:503720. [PMID: 38272634 DOI: 10.1016/j.mrgentox.2023.503720] [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: 09/27/2023] [Revised: 11/23/2023] [Accepted: 11/24/2023] [Indexed: 01/27/2024]
Abstract
5-Aminoisophthalic acid and 5-nitroisophthalic acid (5-NIPA) are potential impurities in preparations of 5-amino-2,4,6-triiodoisophthalic acid, which is a key intermediate in the synthesis of the iodinated contrast agent iopamidol. We have studied their mutagenicity in silico (quantitative structure-activity relationships, QSAR) and by the bacterial reverse mutation assay (Ames test). First, the compounds were screened with the tools Derek Nexus™ and Leadscope®. Both compounds were flagged as potentially mutagenic (class 3 under ICH M7). However, contrary to the in silico prediction, neither chemical was mutagenic in the Ames test (plate incorporation method) with or without S9 metabolic activation.
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Affiliation(s)
- Silvia Rossi
- Bracco Imaging SpA, Bracco Research Centre, Via Ribes 5, 10010 Colleretto Giacosa, TO, Italy.
| | - Simona Bussi
- Bracco Imaging SpA, Bracco Research Centre, Via Ribes 5, 10010 Colleretto Giacosa, TO, Italy
| | - Roberta Bonafè
- Bracco Imaging SpA, Global Medical & Regulatory Affairs, Medical Writing, Via Ribes 5, 10010 Colleretto Giacosa, TO, Italy
| | - Carola Incardona
- Bracco Imaging SpA, Bracco Research Centre, Via Ribes 5, 10010 Colleretto Giacosa, TO, Italy
| | - Emanuela Vurro
- Bracco Imaging SpA, Bracco Research Centre, Via Ribes 5, 10010 Colleretto Giacosa, TO, Italy
| | - Massimo Visigalli
- Bracco Imaging SpA, Bracco Research Centre, Via Ribes 5, 10010 Colleretto Giacosa, TO, Italy
| | - Federica Buonsanti
- Bracco Imaging SpA, Bracco Research Centre, Via Ribes 5, 10010 Colleretto Giacosa, TO, Italy
| | - Roberta Fretta
- Bracco Imaging SpA, Bracco Research Centre, Via Ribes 5, 10010 Colleretto Giacosa, TO, Italy
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Aydin M, Guven Ezer B, Rencuzogullari E. The Future of the Teratogenicity Testing. Methods Mol Biol 2024; 2753:143-150. [PMID: 38285336 DOI: 10.1007/978-1-0716-3625-1_5] [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] [Indexed: 01/30/2024]
Abstract
The purpose of this review is to examine the importance, possible advantages and disadvantages of teratogenicity tests, and their future. For this purpose, numerous sources have been scanned in the field of teratogenicity. Although there are many methods related to teratogenic studies and very important studies have been made in this field, there are still serious deficiencies. There are advantages and disadvantages of in vitro and in vivo classical tests that have been used so far. The current status of in vivo tests is a matter of debate, especially due to the use of experimental animals. However, in vitro tests that do not perform the distribution and metabolism of chemicals also raise doubts in determination of teratogenicity. Despite the modern approaches of molecular biology and genetics and the best diagnostic techniques, the real cause of more than half of congenital diseases is still not understood. In this sense, the importance and necessity of teratogenic tests are understood once again. It is necessary to develop faster, reliable, and inexpensive techniques to replace traditional in vivo tests. It is important to disseminate harmless and reliable imaging techniques such as micro-CT. The use of European Center for the Validation of Alternative Methods (ECVAM) scientifically validated and approved in vitro tests such as embryonic stem cell test (EST), micro mass test (MM), and whole embryo culture (WEC) tests in routine screening can provide a solution in a shorter time than the classical tests. Improving these tests and developing new tests can help to solve the problem permanently.
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Affiliation(s)
- Muhsin Aydin
- Department of Biology, Science and Letters Faculty, Adiyaman University, Adiyaman, Turkey
| | - Banu Guven Ezer
- Department of Biology, Institute of Graduate Education, Adiyaman University, Adiyaman, Turkey
| | - Eyyup Rencuzogullari
- Department of Biology, Science and Letters Faculty, Adiyaman University, Adiyaman, Turkey.
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38
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Shirato M, Takida Y, Kanno T, Matsuura H, Niwano Y, Minamide H, Nakamura K. Mutagenicity assessment of high-power 1.6-THz pulse laser radiation. Photochem Photobiol 2024; 100:146-158. [PMID: 37477119 DOI: 10.1111/php.13840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 06/20/2023] [Accepted: 07/08/2023] [Indexed: 07/22/2023]
Abstract
The effect of terahertz (THz) radiation has been studied in medicine. However, there is a lack of scientific information regarding its possible mutagenicity. Therefore, the present study aimed to assess the mutagenicity of 1.6 THz laser irradiation. The Ames test was conducted using five bacterial tester strains. The bacteria were subjected to (i) 1.6 THz laser irradiation at 3.8 mW/cm2 for 60 min using a tabletop THz pulse laser system, (ii) ultraviolet irradiation, (iii) treatment with positive control chemicals (positive control) or (iv) treatment with the solvent used in the positive control (negative control). After treatment, the bacterial suspensions were cultured on minimal glucose agar to determine the number of revertant colonies. In addition, the comet assay was performed using fibroblasts (V79) to assess possible DNA damage caused by the THz laser irradiation. The Ames test demonstrated that the THz laser irradiation did not increase the number of revertant colonies compared to that in the negative control group, whereas the ultraviolet irradiation and positive control treatment increased the number of revertant colonies. Thus, 1.6 THz laser irradiation is unlikely to be mutagenic. The comet assay additionally suggests that the THz laser irradiation unlikely induce cellular DNA damage.
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Affiliation(s)
- Midori Shirato
- Department of Advanced Free Radical Science, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Yuma Takida
- RIKEN Center for Advanced Photonics, RIKEN, Sendai, Japan
| | - Taro Kanno
- Department of Advanced Free Radical Science, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | | | | | | | - Keisuke Nakamura
- Department of Advanced Free Radical Science, Tohoku University Graduate School of Dentistry, Sendai, Japan
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Mochizuki H, Nagazawa Y, Arimoto-Kobayashi S. Genotoxicity and the stability of N-nitrosomorpholine activity following UVA irradiation. MUTATION RESEARCH. GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2024; 893:503721. [PMID: 38272633 DOI: 10.1016/j.mrgentox.2023.503721] [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: 07/10/2023] [Revised: 11/20/2023] [Accepted: 11/29/2023] [Indexed: 01/27/2024]
Abstract
This study investigated N-nitrosomorpholine (NMOR) genotoxicity following UVA irradiation without metabolic activation. Following UVA irradiation, the photo treated NMOR (irradiated NMOR) was directly mutagenic, without UVA or metabolic activation, in the Ames test. The activity was relatively stable, and approximately 79% of the activity remained after 10 days of storage at 37 °C, 4 °C, or -20 °C. Micronuclei (MN) formation was observed in HaCaT cells after treatment with irradiated NMOR without metabolic activation. The action spectrum of MN formation in response to NMOR irradiation followed the NMOR absorption curve. In vivo, MN formation was observed in the peripheral blood reticulocytes of mice injected with irradiated NMOR under the inhibition of cytochrome P450-mediated metabolism of NMOR. Volatile NMOR may attach to environmental materials and be irradiated with environmental UVA light. Photoactivated NMOR-attached air pollutants could float in the air and fall onto the human body, leading to genotoxicity induced by the irradiated NMOR.
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Affiliation(s)
| | - Yukari Nagazawa
- School of Pharmaceutical Sciences, Okayama University, Japan
| | - Sakae Arimoto-Kobayashi
- School of Pharmaceutical Sciences, Okayama University, Japan; Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8530, Japan.
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40
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Wong JY, Fischer AH, Baris D, Beane-Freeman LE, Karagas MR, Schwenn M, Johnson A, Matthews PP, Swank AE, Hosain GM, Koutros S, Silverman DT, DeMarini DM, Rothman N. Urinary mutagenicity and bladder cancer risk in northern New England. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2024; 65:47-54. [PMID: 38465801 PMCID: PMC11089907 DOI: 10.1002/em.22588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 01/23/2024] [Accepted: 02/21/2024] [Indexed: 03/12/2024]
Abstract
The etiology of bladder cancer among never smokers without occupational or environmental exposure to established urothelial carcinogens remains unclear. Urinary mutagenicity is an integrative measure that reflects recent exposure to genotoxic agents. Here, we investigated its potential association with bladder cancer in rural northern New England. We analyzed 156 bladder cancer cases and 247 cancer-free controls from a large population-based case-control study conducted in Maine, New Hampshire, and Vermont. Overnight urine samples were deconjugated enzymatically and the extracted organics were assessed for mutagenicity using the plate-incorporation Ames assay with the Salmonella frameshift strain YG1041 + S9. Logistic regression was used to estimate the odds ratios (OR) and 95% confidence intervals (CI) of bladder cancer in relation to having mutagenic versus nonmutagenic urine, adjusted for age, sex, and state, and stratified by smoking status (never, former, and current). We found evidence for an association between having mutagenic urine and increased bladder cancer risk among never smokers (OR = 3.8, 95% CI: 1.3-11.2) but not among former or current smokers. Risk could not be estimated among current smokers because nearly all cases and controls had mutagenic urine. Urinary mutagenicity among never-smoking controls could not be explained by recent exposure to established occupational and environmental mutagenic bladder carcinogens evaluated in our study. Our findings suggest that among never smokers, urinary mutagenicity potentially reflects genotoxic exposure profiles relevant to bladder carcinogenesis. Future studies are needed to replicate our findings and identify compounds and their sources that influence bladder cancer risk.
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Affiliation(s)
- Jason Y.Y. Wong
- Epidemiology and Community Health Branch, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, 20892, United States
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, 9609 Medical Center Drive, Rockville, MD, 20850, United States [Formerly affiliated: JYYW, AHF, DB]
| | - Alexander H. Fischer
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, 9609 Medical Center Drive, Rockville, MD, 20850, United States [Formerly affiliated: JYYW, AHF, DB]
| | - Dalsu Baris
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, 9609 Medical Center Drive, Rockville, MD, 20850, United States [Formerly affiliated: JYYW, AHF, DB]
| | - Laura E. Beane-Freeman
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, 9609 Medical Center Drive, Rockville, MD, 20850, United States [Formerly affiliated: JYYW, AHF, DB]
| | - Margaret R. Karagas
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, 1 Medical Center Dr., Lebanon, NH, 03756, United States
| | - Molly Schwenn
- Maine Cancer Registry, 220 Capitol St., Augusta, ME, 04433, United States [Formerly affiliated: MS]
| | - Alison Johnson
- Vermont Cancer Registry, 108 Cherry St., Burlington, VT, 05402, United States
| | - Peggy P. Matthews
- Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, United States
| | - Adam E. Swank
- Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, United States
| | - G. Monawar Hosain
- Formerly, New Hampshire Department of Health and Human Services, Concord, New Hampshire (GMH) Currently, The University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Stella Koutros
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, 9609 Medical Center Drive, Rockville, MD, 20850, United States [Formerly affiliated: JYYW, AHF, DB]
| | - Debra T. Silverman
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, 9609 Medical Center Drive, Rockville, MD, 20850, United States [Formerly affiliated: JYYW, AHF, DB]
| | - David M. DeMarini
- Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, United States
| | - Nathaniel Rothman
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, 9609 Medical Center Drive, Rockville, MD, 20850, United States [Formerly affiliated: JYYW, AHF, DB]
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Taroncher M, Fuentes C, Rodríguez-Carrasco Y, Ruiz MJ. Assessment of the genotoxic and mutagenic effects induced by T-2 mycotoxin in HepG2 cells. Toxicology 2024; 501:153712. [PMID: 38128774 DOI: 10.1016/j.tox.2023.153712] [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: 10/23/2023] [Revised: 12/14/2023] [Accepted: 12/15/2023] [Indexed: 12/23/2023]
Abstract
The T-2 toxin is a mycotoxin produced by molds belonging to Fusarium. Among the Fusarium mycotoxins, trichothecenes are frequently reported in food and feed, being the T-2 toxin (T-2) the mycotoxin which possesses the highest toxicity. According to EFSA, T-2 is found in various cereal grains used in food and feed products, mainly in oats, and it has a high environmental impact due to its mechanisms of toxicity. However, recent information on its genotoxic and mutagenic effects is lacking. This work aimed to evaluate the genotoxic and mutagenic potential of T-2 in vitro. For this purpose, HepG2 cells were exposed to 15, 30, and 60 nM T-2 for 24 h, then the DNA damage was evaluated by the micronucleus and the comet assays. In addition, point mutation analysis was performed by the bacterial reverse mutation test using 0.15-60 nM of T-2 concentrations. The results showed chromosomal damage at 60 nM T-2 since significantly more MN appeared at this concentration than in the control samples. Regarding the comet assay, DNA double helix breaks appeared at all concentrations tested and, in a concentration-dependent manner. However, no mutagenic effects were observed at any of the concentrations tested for the Salmonella typhimurium (S. Typhimurium) strains TA98, TA100, TA1535, TA1537, or the Escherichia coli (E. Coli) WP2 strain in the absence or presence of a metabolic activation system. Therefore, these results showed that T-2 mycotoxin produced genotoxic effects by MN and comet assay, while no mutagenicity was observed. However, further research simulating different metabolic activation pathways and the combined exposure of this mycotoxin with other mutagenic chemicals that could be present in the diet is necessary to discard the mutagenic potential of T-2 fully. These results highlight the carcinogenic potential and danger associated with T-2 exposure and should be considered to prevent associated food risks for the human population.
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Affiliation(s)
- Mercedes Taroncher
- Research Group in Alternative Methods for Determining Toxic Effects and Risk Assessment of Contaminants and Mixtures (RiskTox). Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy and Food Sciences, Universitat de València, Av. Vicent Andrés Estellés s/n, Burjassot, 46100 València, Spain
| | - Cristina Fuentes
- Research Group in Alternative Methods for Determining Toxic Effects and Risk Assessment of Contaminants and Mixtures (RiskTox). Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy and Food Sciences, Universitat de València, Av. Vicent Andrés Estellés s/n, Burjassot, 46100 València, Spain; Department of Food Technology, Universitat Politècnica de València, Camino de Vera s/n, 46022 València, Spain.
| | - Yelko Rodríguez-Carrasco
- Research Group in Alternative Methods for Determining Toxic Effects and Risk Assessment of Contaminants and Mixtures (RiskTox). Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy and Food Sciences, Universitat de València, Av. Vicent Andrés Estellés s/n, Burjassot, 46100 València, Spain
| | - María-José Ruiz
- Research Group in Alternative Methods for Determining Toxic Effects and Risk Assessment of Contaminants and Mixtures (RiskTox). Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy and Food Sciences, Universitat de València, Av. Vicent Andrés Estellés s/n, Burjassot, 46100 València, Spain
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Alabi OA, Okorie B, Simon-Oke IA, Atanda HC, Olumurewa JAV, Adebo TC. Cellular toxicity and DNA damage induced by Newbouldia laevis used for male infertility treatment in prokaryotic and eukaryotic models. PROTOPLASMA 2024; 261:53-64. [PMID: 37438649 DOI: 10.1007/s00709-023-01880-4] [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: 05/12/2023] [Accepted: 06/30/2023] [Indexed: 07/14/2023]
Abstract
Leaves of Newbouldia laevis have been extensively used in solving problems associated with infertility and childbirth in many African countries. Yet, information is very limited on the DNA damaging potential of this plant. This study evaluated the cytogenotoxic effect of the aqueous extract of N. laevis leaf using prokaryotic models (Ames Salmonella fluctuation test using TA100 and TA98 strains of Salmonella typhimurium and SOS Chromotest with Escherichia coli PQ37) and eukaryotic model (Allium cepa root cells). Identification of the volatile organic compounds (VOCs) and phytochemical screening of the plant extract were also performed. Onion bulbs were grown on each concentration (1 to 50%; v/v, extract/tap water) of the extract for chromosomal aberrations and root growth analyses. Results of the Ames test indicated that the extract is mutagenic while the SOS Chromotest results showed good complementation to the Ames test results, although the E. coli PQ37 system showed slightly higher sensitivity in the detection of mutagenicity and genotoxicity of the extract. The plant extract was cytotoxic when compared to the control, inducing a significant (p < 0.05) concentration-dependent inhibition of root growth from 5 to 50% concentrations. At 50% concentration, the extract completely inhibited cell division in the A. cepa. Also, chromosomal aberration increased significantly (p < 0.05) in exposed onions from 5 to 20% concentrations. The mutagenicity and cytogenotoxicity recorded in this report were believed to be caused by the presence of VOCs such as 1,2,3-benzene-triol, 1,2-benzenediol, and 5-hydroxymethylfurfural, and alkaloids in the extract an indication of the cytogenotoxicity of the aqueous extract of N. laevis leaf even at low concentration.
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Affiliation(s)
- Okunola Adenrele Alabi
- Department of Biology, Federal University of Technology, Akure, Ondo State, Nigeria.
- Department of Biotechnology, Federal University of Technology, Akure, Ondo State, Nigeria.
| | - Benson Okorie
- Department of Biotechnology, Federal University of Technology, Akure, Ondo State, Nigeria
| | - Iyabo A Simon-Oke
- Department of Biology, Federal University of Technology, Akure, Ondo State, Nigeria
| | - Halimat Chisom Atanda
- Department of Biotechnology, Federal University of Technology, Akure, Ondo State, Nigeria
| | - John A V Olumurewa
- Department of Biotechnology, Federal University of Technology, Akure, Ondo State, Nigeria
| | - Taiwo Cosmas Adebo
- Department of Biology, Federal University of Technology, Akure, Ondo State, Nigeria
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Forsten E, Finger M, Scholand T, Deitert A, Kauffmann K, Büchs J. Inoculum cell count influences separation efficiency and variance in Ames plate incorporation and Ames RAMOS test. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 905:167035. [PMID: 37709100 DOI: 10.1016/j.scitotenv.2023.167035] [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: 07/06/2023] [Revised: 08/29/2023] [Accepted: 09/11/2023] [Indexed: 09/16/2023]
Abstract
The Ames test is one of the most applied tools in mutagenicity testing of chemicals ever since its introduction by Ames et al. in the 1970s. Its principle is based on histidine auxotrophic bacteria that regain prototrophy through reverse mutations. In the presence of a mutagen, more reverse mutations occur that become visible as increased bacterial growth on medium without histidine. Many miniaturized formats of the Ames test have emerged to enable the testing of environmental water samples, increase experimental throughput, and lower the required amounts of test substances. However, most of these formats still rely on endpoint determinations. In contrast, the recently introduced Ames RAMOS test determines mutagenicity through online monitoring of the oxygen transfer rate. In this study, the oxygen transfer rate of Salmonella typhimurium TA100 during the Ames plate incorporation test was monitored and compared to the Ames RAMOS test to prove its validity further. Furthermore, the Ames RAMOS test in 96-well scale is newly introduced. For both the Ames plate incorporation and the Ames RAMOS test, the influence of the inoculum cell count on the negative control was highlighted: A lower inoculum cell count led to a higher coefficient of variation. However, a lower inoculum cell count also led to a higher separation efficiency in the Ames RAMOS test and, thus, to better detection of a mutagenic substance at lower concentrations.
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Affiliation(s)
- Eva Forsten
- AVT - Biochemical Engineering, RWTH Aachen University, Aachen, Germany
| | - Maurice Finger
- AVT - Biochemical Engineering, RWTH Aachen University, Aachen, Germany
| | - Theresa Scholand
- AVT - Biochemical Engineering, RWTH Aachen University, Aachen, Germany
| | - Alexander Deitert
- AVT - Biochemical Engineering, RWTH Aachen University, Aachen, Germany
| | - Kira Kauffmann
- AVT - Biochemical Engineering, RWTH Aachen University, Aachen, Germany
| | - Jochen Büchs
- AVT - Biochemical Engineering, RWTH Aachen University, Aachen, Germany.
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Acharya S, Shinada NK, Koyama N, Ikemori M, Nishioka T, Hitaoka S, Hakura A, Asakura S, Matsuoka Y, Palaniappan SK. Asking the right questions for mutagenicity prediction from BioMedical text. NPJ Syst Biol Appl 2023; 9:63. [PMID: 38110446 PMCID: PMC10728128 DOI: 10.1038/s41540-023-00324-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 11/28/2023] [Indexed: 12/20/2023] Open
Abstract
Assessing the mutagenicity of chemicals is an essential task in the drug development process. Usually, databases and other structured sources for AMES mutagenicity exist, which have been carefully and laboriously curated from scientific publications. As knowledge accumulates over time, updating these databases is always an overhead and impractical. In this paper, we first propose the problem of predicting the mutagenicity of chemicals from textual information in scientific publications. More simply, given a chemical and evidence in the natural language form from publications where the mutagenicity of the chemical is described, the goal of the model/algorithm is to predict if it is potentially mutagenic or not. For this, we first construct a golden standard data set and then propose MutaPredBERT, a prediction model fine-tuned on BioLinkBERT based on a question-answering formulation of the problem. We leverage transfer learning and use the help of large transformer-based models to achieve a Macro F1 score of >0.88 even with relatively small data for fine-tuning. Our work establishes the utility of large language models for the construction of structured sources of knowledge bases directly from scientific publications.
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Affiliation(s)
| | - Nicolas K Shinada
- The Systems Biology Institute, Tokyo, Japan
- SBX Corporation, Tokyo, Japan
| | - Naoki Koyama
- Global Drug Safety, Eisai Co., Ltd., Tokyo, Japan
| | - Megumi Ikemori
- Planning Operation, hhc Data Creation Center, Eisai Co., Ltd., Tokyo, Japan
| | - Tomoki Nishioka
- 5D Integration Unit, hhc Data Creation Center, Eisai Co., Ltd., Tokyo, Japan
| | - Seiji Hitaoka
- 5D Integration Unit, hhc Data Creation Center, Eisai Co., Ltd., Tokyo, Japan
| | | | | | - Yukiko Matsuoka
- The Systems Biology Institute, Tokyo, Japan
- SBX Corporation, Tokyo, Japan
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45
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Silva CA, Véras JH, Ventura JA, de Melo Bisneto AV, de Oliveira MG, Cardoso Bailão EFL, E Silva CR, Cardoso CG, da Costa Santos S, Chen-Chen L. Chemopreventive effect and induction of DNA repair by oenothein B ellagitannin isolated from leaves of Eugenia uniflora in Swiss Webster treated mice. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2023; 86:929-941. [PMID: 37728073 DOI: 10.1080/15287394.2023.2259425] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
Oenothein B (OeB) is a dimeric ellagitannin with potent antioxidative, antitumor, immunomodulatory, and anti-inflammatory properties. Despite the promising activities of OeB, studies examining the genotoxic or protective effects of this ellagitannin on DNA are scarce. Therefore, to further comprehensively elucidate the chemopreventive profile of OeB, the aim of this study was to evaluate the mutagenic and antimutagenic actions of OeB using Salmonella typhimurium strains with the Ames test. The micronucleus (MN) test and comet assay were used to assess the anticytotoxic and antigenotoxic effects of OeB on mouse bone marrow cells following differing treatments (pre-, co-, and post-treatment) in response to cyclophosphamide (CPA)-induced DNA damage. In addition, histopathological analyses were performed to assess liver and kidney tissues of Swiss Webster treated mice. Our results did not detect mutagenic or antimutagenic activity attributed to OeB at any concentration in the Ames test. Regarding the MN test, data showed that this ellagitannin exerted antigenotoxic and anticytotoxic effects against CPA-induced DNA damage under all treatment conditions. However, no anticytotoxic action was observed in MN test after pre-treatment with the highest doses of OeB. In addition, OeB demonstrated antigenotoxic effects in the comet assay for all treatments. Histopathological analyses indicated that OeB attenuated the toxic effects of CPA in mouse liver and kidneys. These findings suggest that OeB exerted a chemoprotective effect following pre- and co-treatments and a DNA repair action in post-treatment experiments. Our findings indicate that OeB protects DNA against CPA-induced damaging agents and induces post-damage DNA repair.
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Affiliation(s)
| | | | - Joyce Aves Ventura
- Institute of Biological Sciences, Federal University of Goiás, Goiânia-GO, Brazil
| | | | | | | | | | - Clever Gomes Cardoso
- Institute of Biological Sciences, Federal University of Goiás, Goiânia-GO, Brazil
| | | | - Lee Chen-Chen
- Institute of Biological Sciences, Federal University of Goiás, Goiânia-GO, Brazil
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46
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Diniz RR, Domingos TFS, Pinto GR, Cabral LM, de Pádula M, de Souza AMT. Use of in silico and in vitro methods as a potential new approach methodologies (NAMs) for (photo)mutagenicity and phototoxicity risk assessment of agrochemicals. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:167320. [PMID: 37748613 DOI: 10.1016/j.scitotenv.2023.167320] [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: 07/11/2023] [Revised: 09/18/2023] [Accepted: 09/22/2023] [Indexed: 09/27/2023]
Abstract
The increased use of agrochemicals raises concerns about environmental, animal, and mainly human toxicology. The development of New Approach Methodologies (NAMs) for toxicological risk assessment including new in vitro tests and in silico protocols is encouraged. Although agrochemical mutagenicity testing is well established, a complementary alternative approach may contribute to increasing reliability, with the consequent reduction of false-positive results that lead to unnecessary use of animals in follow-up in vivo testing. Additionally, it is unreasonable to underestimate the phototoxic effects of an accidental dermal exposure to agrochemicals during agricultural work or domestic application in the absence of adequate personal protection equipment, especially in terms of photomutagenicity. In this scenario, we addressed the integration of in vitro and in silico techniques as NAMs to assess the mutagenic and phototoxic potential of agrochemicals. In the present study we used the yno1 S. cerevisiae strain as a biomodel for in vitro assessment of agrochemical mutagenicity, both in the absence and in the presence of simulated sunlight. In parallel, in silico predictions were performed using a combination of expert rule-based and statistical-based models to assess gene mutations and phototoxicity. None of the tested agrochemicals showed mutagenic potential in the two proposed approaches. The Gly and 2,4D herbicides were photomutagenic in the in vitro yeast test despite the negative in silico prediction of phototoxicity. Herein, we demonstrated a novel experimental approach combining both in silico and in vitro experiments to address the complementary investigation of the phototoxicity and (photo)mutagenicity of agrochemicals. These findings shed light on the importance of investigating and reconsidering the photosafety assessment of these products, using not only photocytotoxicity assays but also photomutagenicity assays, which should be encouraged.
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Affiliation(s)
- Raiane R Diniz
- Universidade Federal do Rio de Janeiro, Faculdade de Farmácia, Laboratório de Modelagem Molecular & QSAR (ModMolQSAR), Rio de Janeiro, RJ, Brazil; Universidade Federal do Rio de Janeiro, Faculdade de Farmácia, Laboratório de Microbiologia e Avaliação Genotóxica (LAMIAG), Rio de Janeiro, RJ, Brazil
| | | | - Gabriel R Pinto
- Universidade Federal do Rio de Janeiro, Faculdade de Farmácia, Laboratório de Microbiologia e Avaliação Genotóxica (LAMIAG), Rio de Janeiro, RJ, Brazil
| | - Lucio M Cabral
- Universidade Federal do Rio de Janeiro, Faculdade de Farmácia, Laboratório de Tecnologia Industrial Farmacêutica (LabTIF), Rio de Janeiro, RJ, Brazil
| | - Marcelo de Pádula
- Universidade Federal do Rio de Janeiro, Faculdade de Farmácia, Laboratório de Microbiologia e Avaliação Genotóxica (LAMIAG), Rio de Janeiro, RJ, Brazil
| | - Alessandra M T de Souza
- Universidade Federal do Rio de Janeiro, Faculdade de Farmácia, Laboratório de Modelagem Molecular & QSAR (ModMolQSAR), Rio de Janeiro, RJ, Brazil.
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47
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Mishima M, Sugiyama KI. Considerations for the genotoxicity assessment of middle size peptide drugs containing non-canonical amino acid residues. Genes Environ 2023; 45:36. [PMID: 38093344 PMCID: PMC10720048 DOI: 10.1186/s41021-023-00294-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 12/05/2023] [Indexed: 12/17/2023] Open
Abstract
BACKGROUND Middle size peptides (MSPs) have emerged as a promising new pharmaceutical modality. We are seeking the best way to assess the non-clinical safety of MSPs. CONSIDERATION The requirements for assessing the genotoxicity of pharmaceuticals differ between small molecule drugs and biotherapeutics. Genotoxicity tests are necessary for small molecule drugs but not for biotherapeutics. MSPs, however, share similarities with both small molecule drugs and biotherapeutics. Here, we describe important points to consider in assessing the genotoxicity of MSP drugs. The current standard of genotoxicity assessment for small molecules may not be entirely appropriate for MSP drugs. MSP drugs need genotoxicity assessment mostly according to the current standard of small molecule drugs. CONCLUSION We propose a few modifications to the standard test battery of genotoxicity tests, specifically, the inclusion of an in vitro gene mutation test using mammalian cells, and exclusion of (Q)SAR assessment on MSP-related impurities.
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Affiliation(s)
- Masayuki Mishima
- Translational Research Division, Chugai Pharmaceutical Co., Ltd, Yokohama, Kanagawa, 244-8602, Japan.
| | - Kei-Ichi Sugiyama
- Division of Genetics and Mutagenesis, National Institute of Health Sciences, Kawasaki, Kanagawa, 210-9501, Japan
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48
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Dolan M, St. John N, Zaidi F, Doyle F, Fasullo M. High-throughput screening of the Saccharomyces cerevisiae genome for 2-amino-3-methylimidazo [4,5-f] quinoline resistance identifies colon cancer-associated genes. G3 (BETHESDA, MD.) 2023; 13:jkad219. [PMID: 37738679 PMCID: PMC11025384 DOI: 10.1093/g3journal/jkad219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 10/25/2022] [Accepted: 09/15/2023] [Indexed: 09/24/2023]
Abstract
Heterocyclic aromatic amines (HAAs) are potent carcinogenic agents found in charred meats and cigarette smoke. However, few eukaryotic resistance genes have been identified. We used Saccharomyces cerevisiae (budding yeast) to identify genes that confer resistance to 2-amino-3-methylimidazo[4,5-f] quinoline (IQ). CYP1A2 and NAT2 activate IQ to become a mutagenic nitrenium compound. Deletion libraries expressing human CYP1A2 and NAT2 or no human genes were exposed to either 400 or 800 µM IQ for 5 or 10 generations. DNA barcodes were sequenced using the Illumina HiSeq 2500 platform and statistical significance was determined for exactly matched barcodes. We identified 424 ORFs, including 337 genes of known function, in duplicate screens of the "humanized" collection for IQ resistance; resistance was further validated for a select group of 51 genes by growth curves, competitive growth, or trypan blue assays. Screens of the library not expressing human genes identified 143 ORFs conferring resistance to IQ per se. Ribosomal protein and protein modification genes were identified as IQ resistance genes in both the original and "humanized" libraries, while nitrogen metabolism, DNA repair, and growth control genes were also prominent in the "humanized" library. Protein complexes identified included the casein kinase 2 (CK2) and histone chaperone (HIR) complex. Among DNA Repair and checkpoint genes, we identified those that function in postreplication repair (RAD18, UBC13, REV7), base excision repair (NTG1), and checkpoint signaling (CHK1, PSY2). These studies underscore the role of ribosomal protein genes in conferring IQ resistance, and illuminate DNA repair pathways for conferring resistance to activated IQ.
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Affiliation(s)
- Michael Dolan
- College of Nanotechnology, Science, and Engineering, State University of NewYork at Albany, Albany, NY 12203, USA
| | - Nick St. John
- College of Nanotechnology, Science, and Engineering, State University of NewYork at Albany, Albany, NY 12203, USA
| | - Faizan Zaidi
- College of Nanotechnology, Science, and Engineering, State University of NewYork at Albany, Albany, NY 12203, USA
| | - Francis Doyle
- College of Nanotechnology, Science, and Engineering, State University of NewYork at Albany, Albany, NY 12203, USA
| | - Michael Fasullo
- College of Nanotechnology, Science, and Engineering, State University of NewYork at Albany, Albany, NY 12203, USA
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49
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Yamada M, Suzuki T, Kohara A, Honma M. Carcinogenic risk of food additive AF-2 banned in Japan: a case study on reassessment of genotoxicity. Genes Environ 2023; 45:33. [PMID: 38053221 PMCID: PMC10696715 DOI: 10.1186/s41021-023-00292-3] [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: 08/26/2023] [Accepted: 11/27/2023] [Indexed: 12/07/2023] Open
Abstract
BACKGROUND Carcinogenic risk assessment studies have been repeatedly improved and are still being debated to find a goal. Evaluation might be changed if new approaches would be applied to some chemicals which means that new approaches may change the final assessment. In this paper, the risk assessment of a chemical, in particular the proper carcinogenicity, is examined using the long-banned food additive, 2-(2-furyl)-3-(5-nitro-2-furyl)-acrylamide, AF-2, as a case study. RESULTS First, Ames tests were carried out using strains TA1535, TA100, TA1538, and TA98 and their nitroreductase-deficient strains YG7127, YG7128, YG7129, and YG7130. The results showed that mutagenic activity was reduced by about 50% in the nitroreductase-deficient strains, indicating that part of the mutagenic activity shown in Ames test was due to bacterial metabolism. Second, in vivo genotoxicity tests were conducted, including the one that had not been developed in 1970's. Both a micronucleus test and a gene mutation assay using transgenic mice were negative. Third, assuming it is a genotoxic carcinogen, the virtual safety dose of 550 μg/day was calculated from the TD50 in rats with a probability of 10-5. CONCLUSION AF-2 has been shown to be carcinogenic to rodents and has previously been indicated to be genotoxic in vitro. However, the present in vivo genotoxicity study, it was negative in the forestomach, a target organ for cancer, particularly in the gene mutation assay in transgenic mice. Considering the daily intake of AF-2 in the 1970s and its virtually safety dose, the carcinogenic risk of AF-2 could be considered acceptable.
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Affiliation(s)
- Masami Yamada
- Department of Applied Chemistry, National Defense Academy, 1-10-20, Hashirimizu, Yokosuka, Kanagawa, 239-8686, Japan.
- Division of Genetics and Mutagenesis, National Institute of Health Sciences, 3-25-26, Tonomachi, Kawasaki-ku, Kawasaki city, Kanagawa, 210-9501, Japan.
| | - Takayoshi Suzuki
- Division of Genetics and Mutagenesis, National Institute of Health Sciences, 3-25-26, Tonomachi, Kawasaki-ku, Kawasaki city, Kanagawa, 210-9501, Japan
| | - Arihiro Kohara
- JCRB Cell Bank, National Institute of Biomedical Innovation, 7-6-8, Saito-asagi, Osaka, Ibaraki, 567-0085, Japan
| | - Masamitsu Honma
- Division of General Affairs, National Institute of Health Sciences, 3-25-26, Tonomachi, Kawasaki-ku, Kawasaki city, Kanagawa, 210-9501, Japan
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50
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Mishra N, Srivastava R. Bacterial worth in genotoxicity assessment studies. J Microbiol Methods 2023; 215:106860. [PMID: 38008307 DOI: 10.1016/j.mimet.2023.106860] [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: 10/16/2023] [Revised: 11/18/2023] [Accepted: 11/19/2023] [Indexed: 11/28/2023]
Abstract
Bacterial-based genotoxicity test systems play a significant role in the detection and evaluation of genotoxicity in vitro and have gained importance due to attributes like wide applicability, speed, high sensitivity, good reproducibility, and simplicity. The Salmonella microsomal mutagenicity assay was created by Ames and colleagues at the beginning of the 1970s, and it was based on the fundamental notion that in auxotrophic bacterial strains with inhibited growth, a mutant gene would revert to its original state on exposure to genotoxicants. This is the most successful and widely used in vitro genotoxicity test. Later, a number of additional test systems that incorporated DNA repair mechanisms including the bacterial SOS response were created. Genetic engineering has further provided significant advancement in these test systems with the development of highly sophisticated bacterial tester strains with significantly increased sensitivity to evaluate the chemical nature of hazardous substances and pollutants. These bacterial bioassays render an opportunity to detect the defined effects of compounds at the molecular level. In this review, all the aspects related to the bacterial system in genotoxicity assessment have been summarized and their role is elaborated concerning real-time requirements and future perspectives.
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Affiliation(s)
- Nidhi Mishra
- Department of Zoology, University of Lucknow, Lucknow, U.P. 226007, India.
| | - Rashmi Srivastava
- Department of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, U.P. 226025, India
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