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Li X, Lian T, Su B, Liu H, Wang Y, Wu X, He J, Wang Y, Xu Y, Yang S, Li Y. Construction of a physiologically based pharmacokinetic model of paclobutrazol and exposure estimation in the human body. Toxicology 2024; 505:153841. [PMID: 38796053 DOI: 10.1016/j.tox.2024.153841] [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: 04/01/2024] [Revised: 05/15/2024] [Accepted: 05/21/2024] [Indexed: 05/28/2024]
Abstract
Paclobutrazol (PBZ) is a plant growth regulator that can delay plant growth and improve plant resistance and yield. Although it has been widely used in the growth of medicinal plants, human beings may take it by taking traditional Chinese medicine. There are no published studies on PBZ exposure in humans or standardized limits for PBZ in medicinal plants. We measured the solubility, oil-water partition coefficient (logP), and pharmacokinetics of PBZ in rats and established a physiologically based pharmacokinetic (PBPK) model of PBZ in rats. This was followed by extrapolation to healthy Chinese adult males as a theoretical foundation for future risk assessment of PBZ. The results showed that PBZ had low solubility and high fat solubility. Pharmacokinetic experiments showed that PBZ was absorbed rapidly but eliminated slowly in rats. On this basis, the rat PBPK model was successfully constructed and extrapolated to healthy Chinese adult males to predict the plasma concentration-time curve and exposure of PBZ in humans. The construction of the PBPK model of PBZ in this study facilitates the determination of the standard formulation limits and risk assessment of PBZ residues in medicinal plants.
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Affiliation(s)
- Xiaomeng Li
- Tianjin University of Traditional Chinese Medicine, No. 10 Poyang Lake Road, West Zone, Jinghai District, Tuanbo New City, Tianjin 301617, PR China
| | - Tingting Lian
- Tianjin University of Traditional Chinese Medicine, No. 10 Poyang Lake Road, West Zone, Jinghai District, Tuanbo New City, Tianjin 301617, PR China
| | - Buda Su
- Tianjin University of Traditional Chinese Medicine, No. 10 Poyang Lake Road, West Zone, Jinghai District, Tuanbo New City, Tianjin 301617, PR China
| | - Hui Liu
- Tianjin University of Traditional Chinese Medicine, No. 10 Poyang Lake Road, West Zone, Jinghai District, Tuanbo New City, Tianjin 301617, PR China
| | - Yuming Wang
- Tianjin University of Traditional Chinese Medicine, No. 10 Poyang Lake Road, West Zone, Jinghai District, Tuanbo New City, Tianjin 301617, PR China
| | - Xiaoyan Wu
- Tianjin University of Traditional Chinese Medicine, No. 10 Poyang Lake Road, West Zone, Jinghai District, Tuanbo New City, Tianjin 301617, PR China
| | - Junjie He
- Tianjin University of Traditional Chinese Medicine, No. 10 Poyang Lake Road, West Zone, Jinghai District, Tuanbo New City, Tianjin 301617, PR China
| | - Yue Wang
- Tianjin University of Traditional Chinese Medicine, No. 10 Poyang Lake Road, West Zone, Jinghai District, Tuanbo New City, Tianjin 301617, PR China
| | - Yanyan Xu
- Tianjin University of Traditional Chinese Medicine, No. 10 Poyang Lake Road, West Zone, Jinghai District, Tuanbo New City, Tianjin 301617, PR China.
| | - Shenshen Yang
- Tianjin University of Traditional Chinese Medicine, No. 10 Poyang Lake Road, West Zone, Jinghai District, Tuanbo New City, Tianjin 301617, PR China.
| | - Yubo Li
- Tianjin University of Traditional Chinese Medicine, No. 10 Poyang Lake Road, West Zone, Jinghai District, Tuanbo New City, Tianjin 301617, PR China.
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Choi J, Rotter S, Ritz V, Kneuer C, Marx-Stoelting P, de Lourdes Marzo Solano M, Oertel A, Rudzok S, Ziková-Kloas A, Tralau T, Hensel A. Thresholds of adversity for endocrine disrupting substances: a conceptual case study. Arch Toxicol 2024:10.1007/s00204-024-03748-9. [PMID: 38704806 DOI: 10.1007/s00204-024-03748-9] [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: 02/02/2024] [Accepted: 03/21/2024] [Indexed: 05/07/2024]
Abstract
For endocrine disrupting chemicals (EDC) the existence of "safe exposure levels", that is exposure levels that do not present an appreciable risk to human health is most controversially discussed, as is the existence of health-based reference values. Concerns have been especially raised that EDCs might not possess a threshold level such that no exposure level to EDCs can be considered safe. To explore whether or not threshold levels can be identified, we performed a screening exercise on 14 pesticidal and biocidal active substances previously identified as EDCs in the European Union. The respective substances are ideal subjects for case studies to review for endocrine activity and disruptive potential following well-defined regulatory assessment based on solid data to effectually establish adversity as consequence of endocrine disruption. Dimethomorph, metiram and propiconazole for which the weight of evidence demonstrating endocrine disruption was the strongest were used as subjects for further study. Epoxiconazole was additionally selected as its effects on the endocrine system are extensive. For all four substances, analysis of the toxicological data clearly indicated thresholds of adversity below which no adverse effects mediated through an endocrine mechanism were observed. Particular emphasis was placed on mechanistic considerations including homeostasis and the concept of adversity. As a proof of concept this study provides evidence that like other substances of toxicological concern EDCs have threshold levels for adversity. While for some EDCs the respective thresholds might indeed be very low this shows that, data allowing, for other EDCs sufficiently protective reference values can be derived.
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Affiliation(s)
- Judy Choi
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589, Berlin, Germany
| | - Stefanie Rotter
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589, Berlin, Germany
| | - Vera Ritz
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589, Berlin, Germany
| | - Carsten Kneuer
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589, Berlin, Germany
| | - Philip Marx-Stoelting
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589, Berlin, Germany
| | | | - Angelika Oertel
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589, Berlin, Germany
| | - Susanne Rudzok
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589, Berlin, Germany
| | - Andrea Ziková-Kloas
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589, Berlin, Germany
| | - Tewes Tralau
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589, Berlin, Germany.
| | - Andreas Hensel
- German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Straße 8-10, 10589, Berlin, Germany
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Takács E, Lázár D, Siakwa A, Klátyik S, Mörtl M, Kocsányi L, Barócsi A, Lenk S, Lengyel E, Székács A. Ecotoxicological Evaluation of Safener and Antimicrobial Additives in Isoxaflutole-Based Herbicide Formulations. TOXICS 2024; 12:238. [PMID: 38668461 PMCID: PMC11055135 DOI: 10.3390/toxics12040238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 03/18/2024] [Accepted: 03/22/2024] [Indexed: 04/29/2024]
Abstract
The environmental load by isoxaflutole and its formulated herbicide products has increasingly become apparent because, after the ban of atrazine, isoxaflutole has become its replacement active ingredient (a.i.). Obtaining information regarding the fate of this a.i. in environmental matrices and its ecotoxicological effects on aquatic organisms is essential for the risk assessment of the herbicide. In this study, the effects of Merlin Flexx- and Merlin WG75 formulated isoxaflutole-based herbicide products and two selected additives (cyprosulfamide safener and 1,2-benzisothiazol-3(2H)-one antimicrobial agent) were investigated on Raphidocelis subcapitata in growth inhibition assays. In ecotoxicological tests, two conventional (optical density and chlorophyll-a content) and two induced fluorescence-based (Fv*/Fp: efficiency of the photosystem PSII and Rfd* changes in the observed ratio of fluorescence decrease) endpoints were determined by UV-spectrophotometer and by our FluoroMeter Module, respectively. Furthermore, dissipation of isoxaflutole alone and in its formulated products was examined by an HPLC-UV method. In ecotoxicological assays, the fluorescence-based Rfd* was observed as the most sensitive endpoint. In this study, the effects of the safener cyprosulfamide and the antimicrobial agent 1,2-benzisothiazol-3(2H)-one on R. subcapitata is firstly reported. The results indicated that the isoxaflutole-equivalent toxicity of the mixture of the isoxaflutole-safener-antimicrobial agent triggered lower toxicity (EC50 = 2.81 ± 0.22 mg/L) compared to the individual effect of the a.i. (EC50 = 0.02 ± 0.00 mg/L). The Merlin Flexx formulation (EC50 = 27.04 ± 1.41 mg/L) was found to be approximately 50-fold less toxic than Merlin WG75, which can be explained by the different chemical characteristics and quantity of additives in them. The additives influenced the dissipation of the a.i. in Z8 medium, as the DT50 value decreased by approximately 1.2- and 3.5-fold under light and dark conditions, respectively.
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Affiliation(s)
- Eszter Takács
- Agro-Environmental Research Centre, Institute of Environmental Sciences, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1., H-2100 Gödöllő, Hungary; (A.S.); (S.K.); (M.M.); (A.S.)
| | - Diána Lázár
- Limnology Research Group, Center of Natural Science, University of Pannonia, Egyetem u. 10., H-8200 Veszprém, Hungary; (D.L.); (E.L.)
- Aquatic Botany and Microbial Ecology Research Group, HUN-REN-BLKI, Klebelsberg Kuno u. 3, H-8237 Tihany, Hungary
| | - Augustine Siakwa
- Agro-Environmental Research Centre, Institute of Environmental Sciences, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1., H-2100 Gödöllő, Hungary; (A.S.); (S.K.); (M.M.); (A.S.)
| | - Szandra Klátyik
- Agro-Environmental Research Centre, Institute of Environmental Sciences, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1., H-2100 Gödöllő, Hungary; (A.S.); (S.K.); (M.M.); (A.S.)
| | - Mária Mörtl
- Agro-Environmental Research Centre, Institute of Environmental Sciences, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1., H-2100 Gödöllő, Hungary; (A.S.); (S.K.); (M.M.); (A.S.)
| | - László Kocsányi
- Department of Atomic Physics, Institute of Physics, Budapest University of Technology and Economics, Műegyetem rkp. 3., H-1111 Budapest, Hungary; (L.K.); (A.B.); (S.L.)
| | - Attila Barócsi
- Department of Atomic Physics, Institute of Physics, Budapest University of Technology and Economics, Műegyetem rkp. 3., H-1111 Budapest, Hungary; (L.K.); (A.B.); (S.L.)
| | - Sándor Lenk
- Department of Atomic Physics, Institute of Physics, Budapest University of Technology and Economics, Műegyetem rkp. 3., H-1111 Budapest, Hungary; (L.K.); (A.B.); (S.L.)
| | - Edina Lengyel
- Limnology Research Group, Center of Natural Science, University of Pannonia, Egyetem u. 10., H-8200 Veszprém, Hungary; (D.L.); (E.L.)
- Limnoecology Research Group, ELKH-PE, Egyetem u. 10, H-8200 Veszprém, Hungary
| | - András Székács
- Agro-Environmental Research Centre, Institute of Environmental Sciences, Hungarian University of Agriculture and Life Sciences, Páter Károly u. 1., H-2100 Gödöllő, Hungary; (A.S.); (S.K.); (M.M.); (A.S.)
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Liu H, Xu Y, Wang Y, Liu C, Chen J, Fan S, Xie L, Dong Y, Chen S, Zhou W, Li Y. Study on endocrine disruption effect of paclobutrazol and uniconazole on the thyroid of male and female rats based on lipidomics. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 234:113386. [PMID: 35286959 DOI: 10.1016/j.ecoenv.2022.113386] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 02/21/2022] [Accepted: 03/02/2022] [Indexed: 06/14/2023]
Abstract
The present study investigated the effects of paclobutrazol and uniconazole on thyroid endocrine system in rats. Lipidomic analysis was performed to obtain the biomarkers of thyroid endocrine disruption induced by paclobutrazol and uniconazole. Network pharmacology was further used to discover potential targets of biomarkers related to drugs and diseases. After paclobutrazol and uniconazole administration, seven and four common biomarkers related to thyroid endocrine disruption for female and male rats were obtained, respectively. Paclobutrazol and uniconazole significantly increased the biomarker levels of PG (12:0/15:0), PS (14:0/16:0), PA (20:1/15:0) and PG (13:0/17:0) in both sexes of rats. Exposure to paclobutrazol additionally caused a significant decrease of PG (22:6/20:2), PE (24:1/18:1) and PE (24:0/18:0) in female rats, while an increase in male rats. Changes of the common biomarkers for paclobutrazol and uniconazole revealed similar endocrine disruption effect, which was higher in the females. Network pharmacology and KEGG pathway analysis indicated that the thyroid endocrine disrupting effects of paclobutrazol and uniconazole may be related to V-akt murine thymoma viral oncogene homolog (Akts), mitogen-activated protein kinase (MAPKs), epidermal growth factor receptor (EGFR), Insulin-like growth factor (IGF-1), IGF-IR and V-Raf murine sarcoma viral oncogene homolog B1 (BRAF). The results demonstrated that paclobutrazol and uniconazole could cause thyroid endocrine disorders in male and female rats, which were sex-specific, thus highlighting the importance of safe and effective application of these plant growth regulators.
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Affiliation(s)
- Hui Liu
- Tianjin University of Traditional Chinese Medicine, No. 10, Poyang Lake Road, West Zone, Tuanbo New City, Jinghai District, Tianjin 301617, China
| | - Yanyan Xu
- Tianjin University of Traditional Chinese Medicine, No. 10, Poyang Lake Road, West Zone, Tuanbo New City, Jinghai District, Tianjin 301617, China
| | - Yuming Wang
- Tianjin University of Traditional Chinese Medicine, No. 10, Poyang Lake Road, West Zone, Tuanbo New City, Jinghai District, Tianjin 301617, China
| | - Chunyang Liu
- National Aquatic Germplasm Resources Conservation Area Management Office in Qinhuangdao, Daihe Fishing Port, West Beach Road, Beidaihe District, Qinhuangdao, Hebei 066000, China
| | - Jun Chen
- Animal Health Supervision Office in Qinhuangdao, No. 52, Guancheng South Road, Shanhaiguan District, Qinhuangdao, Hebei 066000, China
| | - Simiao Fan
- Tianjin University of Traditional Chinese Medicine, No. 10, Poyang Lake Road, West Zone, Tuanbo New City, Jinghai District, Tianjin 301617, China
| | - Lijuan Xie
- Tianjin University of Traditional Chinese Medicine, No. 10, Poyang Lake Road, West Zone, Tuanbo New City, Jinghai District, Tianjin 301617, China
| | - Yaqian Dong
- Tianjin University of Traditional Chinese Medicine, No. 10, Poyang Lake Road, West Zone, Tuanbo New City, Jinghai District, Tianjin 301617, China
| | - Siyu Chen
- Tianjin University of Traditional Chinese Medicine, No. 10, Poyang Lake Road, West Zone, Tuanbo New City, Jinghai District, Tianjin 301617, China
| | - Wenjie Zhou
- Tianjin University of Traditional Chinese Medicine, No. 10, Poyang Lake Road, West Zone, Tuanbo New City, Jinghai District, Tianjin 301617, China
| | - Yubo Li
- Tianjin University of Traditional Chinese Medicine, No. 10, Poyang Lake Road, West Zone, Tuanbo New City, Jinghai District, Tianjin 301617, China.
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Schulze M, Hensel B, Schröter D, Leiding C, Jung M, Lautner M. Reprotoxic effects of fenpropimorph on the fertilizing potential of AI boars: A case study. Reprod Domest Anim 2021; 57:337-340. [PMID: 34863004 DOI: 10.1111/rda.14062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 12/01/2021] [Indexed: 11/28/2022]
Abstract
This case study describes the effects of a contamination of boar bedding material with reprotoxic compounds in an AI centre in southern Germany. The origin of the investigations was an extreme decline in the production output of the boars. In July 2021, more than 54% of boars were not in production and over 45% of ejaculates had insufficient sperm quality and quantity, which is a significant drop in comparison with the other months. This drop was accompanied by oligozoospermia (azoospermia), asthenozoospermia and teratozoospermia. Through intensive troubleshooting, the changes could be attributed to fenpropimorph, an ergosterol biosynthesis-inhibiting fungicide with reprotoxic potential, which was found in the sawdust used as bedding as well as in liver samples of affected animals, reaching a concentration (mean ± SD) between 0.20 ± 0.36 mg/kg and 0.019 ± 0.001 mg/kg respectively. Furthermore, autopsy findings revealed hyperaemia of the testis, histologically focal degeneration of the germinal epithelium and signs of reduced spermatogenesis and spermiogenesis.
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Affiliation(s)
- Martin Schulze
- Institute for Reproduction of Farm Animals Schönow, Bernau, Germany
| | - Britta Hensel
- Institute for Reproduction of Farm Animals Schönow, Bernau, Germany
| | - David Schröter
- Institut für Getreideverarbeitung GmbH, Nuthetal, Germany
| | - Claus Leiding
- Besamungsverein Neustadt a. d. Aisch e. V., Neustadt a. d. Aisch, Germany
| | - Markus Jung
- Institute for Reproduction of Farm Animals Schönow, Bernau, Germany
| | - Matthias Lautner
- Besamungsverein Neustadt a. d. Aisch e. V., Neustadt a. d. Aisch, Germany
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Budak TB, Ayyıldız MF, Chormey DS, Bakırdere S. Combination of vortex assisted binary solvent microextraction and QuEChERS for the determination of prothiofos, oxadiargyl, and gamma-cyhalothrin in water and pineapple samples by gas chromatography mass spectrometry. ENVIRONMENTAL MONITORING AND ASSESSMENT 2020; 192:273. [PMID: 32266493 DOI: 10.1007/s10661-020-8209-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 03/04/2020] [Indexed: 06/11/2023]
Abstract
An accurate and sensitive dispersive liquid-liquid microextraction method based on binary solvents was used to enrich prothiofos, oxadiargyl, and gamma-cyhalothrin for quantification by GC-MS. The combination of two extraction solvents (binary mixture) resulted in higher extraction efficiencies compared to the single solvent extraction systems. Parameters of the binary extraction method where optimized to enhance the extraction output of the analytes. The limits of detection calculated for the analytes ranged between 0.59 and 1.6 ng/mL. Linear calibration plots of the analytes covered wide concentration ranges with R2 values greater than 0.9996 and percent relative standard deviation lower than 10%. Spiked recovery experiments were performed well and wastewater at two different concentrations and satisfactory results (89-104%) were obtained. The binary solvent microextraction method was combined with QuEChERS to quantify the analytes in pineapple matrix, using matrix matching method to enhance the accuracy of the method to almost 100%.
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Affiliation(s)
- Türkan Börklü Budak
- Faculty of Arts and Science, Chemistry Department, Yıldız Technical University, 34220, İstanbul, Turkey.
| | - Merve Fırat Ayyıldız
- Faculty of Arts and Science, Chemistry Department, Yıldız Technical University, 34220, İstanbul, Turkey
| | - Dotse Selali Chormey
- Faculty of Arts and Science, Chemistry Department, Yıldız Technical University, 34220, İstanbul, Turkey
| | - Sezgin Bakırdere
- Faculty of Arts and Science, Chemistry Department, Yıldız Technical University, 34220, İstanbul, Turkey.
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Wong HL, Garthwaite DG, Ramwell CT, Brown CD. Assessment of occupational exposure to pesticide mixtures with endocrine-disrupting activity. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:1642-1653. [PMID: 30448946 DOI: 10.1007/s11356-018-3676-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 11/05/2018] [Indexed: 06/09/2023]
Abstract
Occupational exposure to pesticide mixtures comprising active substance(s) and/or co-formulant(s) with known/possible endocrine-disrupting activity was assessed using long-term activity records for 50 professional operators representing arable and orchard cropping systems in Greece, Lithuania, and the UK. Exposure was estimated using the harmonised Agricultural Operator Exposure Model, and risk was quantified as a point of departure index (PODI) using the lowest no observed (adverse) effect level. Use of substances with known/possible endocrine activity was common, with 43 of the 50 operators applying at least one such active substance on more than 50% of spray days; at maximum, one UK operator sprayed five such active substances and 10 such co-formulants in a single day. At 95th percentile, total exposure was largest in the UK orchard system (0.041 × 10-2 mg kg bw-1 day-1) whereas risk was largest in the Greek cropping systems (PODI 0.053 × 10-1). All five cropping systems had instances indicating potential for risk when expressed at a daily resolution (maximum PODI 1.2-10.7). Toxicological data are sparse for co-formulants, so combined risk from complex mixtures of active substances and co-formulants may be larger in reality.
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Affiliation(s)
- Hie Ling Wong
- Environment Department, University of York, York, YO10 5NG, UK.
- Faculty of Earth Science, University Malaysia Kelantan, Locked Bag 100, 17600, Jeli, Kelantan, Malaysia.
| | | | | | - Colin D Brown
- Environment Department, University of York, York, YO10 5NG, UK
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Devillers J, Devillers H, Bro E, Millot F. Expert judgment based multicriteria decision models to assess the risk of pesticides on reproduction failures of grey partridge. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2017; 28:889-911. [PMID: 29206499 DOI: 10.1080/1062936x.2017.1402449] [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: 10/23/2017] [Accepted: 11/04/2017] [Indexed: 06/07/2023]
Abstract
A suite of models is proposed for estimating the risk of pesticides against the grey partridge (Perdix perdix) and their clutches. Radio-tracked data of females, description and location of the clutches, and data on the pesticide treatments during the laying periods of the partridges were used as basic information. Quantitative structure-activity relationship (QSAR) and quantitative structure-property relationship (QSPR) modelling allowed us to characterize the pesticides by their 1-octanol/water partition coefficient (log P), vapour pressure, primary and ultimate biodegradation potential, acute toxicity (LD50) on P. perdix, and endocrine disruption potential. From these physicochemical and toxicological data, the system of integration of risk with interaction of scores (SIRIS) method was used to design scores of risk for pesticides, alone or in mixture. A program, written in R (version 3.1.1), called Simulation of Toxicity in Perdix perdix (SimToxPP), was designed for estimating the risk of substances, considered alone or in mixture, against the grey partridge during breeding. The software tool is flexible enough to simulate realistic in situ scenarios. Different examples of applications are shown. The advantages and limitations of the approach are briefly discussed.
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Affiliation(s)
| | - H Devillers
- b Micalis Institute, INRA, University Paris-Saclay , Jouy-en-Josas , France
| | - E Bro
- c Research Department , National Game and Wildlife Institute (ONCFS) , Auffargis , France
| | - F Millot
- c Research Department , National Game and Wildlife Institute (ONCFS) , Auffargis , France
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Analysis of catalyst photo-oxidation selectivity in the degradation of polyorganochlorinated pollutants in batch systems using UV and UV/TiO 2. SOUTH AFRICAN JOURNAL OF CHEMICAL ENGINEERING 2017. [DOI: 10.1016/j.sajce.2016.12.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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10
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Mixture effects of azole fungicides on the adrenal gland in a broad dose range. Toxicology 2017; 385:28-37. [DOI: 10.1016/j.tox.2017.04.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 04/07/2017] [Accepted: 04/24/2017] [Indexed: 02/04/2023]
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Zhang P, Zhu W, Wang D, Yan J, Wang Y, He L. Enantioselective Effects of Metalaxyl Enantiomers on Breast Cancer Cells Metabolic Profiling Using HPLC-QTOF-Based Metabolomics. Int J Mol Sci 2017; 18:ijms18010142. [PMID: 28085117 PMCID: PMC5297775 DOI: 10.3390/ijms18010142] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 12/29/2016] [Accepted: 01/04/2017] [Indexed: 02/07/2023] Open
Abstract
In this study, an integrative high-performance liquid chromatography coupled with quadrupole time-of-flight tandem mass spectrometry (HPLC-QTOF) based metabolomics approach was performed to evaluate the enantioselective metabolic perturbations in MCF-7 cells after treatment with R-metalaxyl and S-metalaxyl, respectively. Untargeted metabolomics profile, multivariate pattern recognition, metabolites identification, and pathway analysis were determined after metalaxyl enantiomer exposure. Principal component analysis (PCA) and partitial least-squares discriminant analysis (PLS-DA) directly reflected the enantioselective metabolic perturbations induced by metalaxyl enantiomers. On the basis of multivariate statistical results, a total of 49 metabolites including carbohydrates, amino acids, nucleotides, fatty acids, organic acids, phospholipids, indoles, derivatives, etc. were found to be the most significantly changed metabolites and metabolic fluctuations caused by the same concentration of R-metalaxyl and S-metalaxyl were enantioselective. Pathway analysis indicated that R-metalaxyl and S-metalaxyl mainly affected the 7 and 10 pathways in MCF-7 cells, respectively, implying the perturbed pathways induced by metalaxyl enantiomers were also enantioselective. Furthermore, the significantly perturbed metabolic pathways were highly related to energy metabolism, amino acid metabolism, lipid metabolism, and antioxidant defense. Such results provide more specific insights into the enantioselective metabolic effects of chiral pesticides in breast cancer progression, reveal the underlying mechanisms, and provide available data for the health risk assessments of chiral environmental pollutants at the molecular level.
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Affiliation(s)
- Ping Zhang
- College of Plant Protection, Southwest University, Chongqing 400715, China.
| | - Wentao Zhu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Department of Applied Chemistry, China Agricultural University, Beijing 100193, China.
| | - Dezhen Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Department of Applied Chemistry, China Agricultural University, Beijing 100193, China.
| | - Jin Yan
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Department of Applied Chemistry, China Agricultural University, Beijing 100193, China.
| | - Yao Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Department of Applied Chemistry, China Agricultural University, Beijing 100193, China.
| | - Lin He
- College of Plant Protection, Southwest University, Chongqing 400715, China.
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Vardavas AI, Stivaktakis PD, Tzatzarakis MN, Fragkiadaki P, Vasilaki F, Tzardi M, Datseri G, Tsiaoussis J, Alegakis AK, Tsitsimpikou C, Rakitskii VN, Carvalho F, Tsatsakis AM. Long-term exposure to cypermethrin and piperonyl butoxide cause liver and kidney inflammation and induce genotoxicity in New Zealand white male rabbits. Food Chem Toxicol 2016; 94:250-9. [PMID: 27321377 DOI: 10.1016/j.fct.2016.06.016] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 06/14/2016] [Accepted: 06/14/2016] [Indexed: 11/17/2022]
Abstract
Cypermethrin (CY) is a frequently used class II pyrethroid pesticide, while piperonyl butoxide (PBO) plays a major role in the pesticide formulation of synthetic pyrethroids. Synthetic pyrethroids are metabolized in mammals via oxidation and ester hydrolysis. PBO can prevent the metabolism of CY and enhances its pesticide effect. While this potentiation effect reduces the amount of pesticide required to eliminate insects, it is not clear how this mixture affects mammals. In our in vivo experiment, New Zealand white male rabbits were exposed to low and high doses of CY, PBO, and their combinations, for 4 months. Genotoxicity and cytotoxicity were monitored by measuring binucleated cells with micronuclei (BNMN), micronuclei (MN) and the cytokinesis block proliferation index (CBPI) in lymphocytes. After two months of exposure, a statistically significant increase in the frequency of BNMN was observed for all exposed animals (p < 0.001) in a dose-dependent way. MN were significantly elevated compared to controls (p < 0.001), with high dose groups reaching a 442% increase when co-exposed. BNMN and MN continued to increase after four months. Histopathological examination of lesions showed damage involving inflammation, attaining lymphoplasmatocytic infiltration in the high dose groups. Both CY and PBO cause liver and kidney inflammation and induce genotoxicity.
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Affiliation(s)
- Alexander I Vardavas
- Laboratory of Toxicology, Medical School, University of Crete, Voutes, 71409 Heraklion, Crete, Greece
| | - Polychronis D Stivaktakis
- Laboratory of Toxicology, Medical School, University of Crete, Voutes, 71409 Heraklion, Crete, Greece
| | - Manolis N Tzatzarakis
- Laboratory of Toxicology, Medical School, University of Crete, Voutes, 71409 Heraklion, Crete, Greece
| | - Persefoni Fragkiadaki
- Laboratory of Toxicology, Medical School, University of Crete, Voutes, 71409 Heraklion, Crete, Greece
| | - Fotini Vasilaki
- Laboratory of Toxicology, Medical School, University of Crete, Voutes, 71409 Heraklion, Crete, Greece
| | - Maria Tzardi
- Department of Pathology, Medical School Voutes-Stavrakia, Heraklion, Crete, Greece
| | - Galateia Datseri
- Department of Pathology, Medical School Voutes-Stavrakia, Heraklion, Crete, Greece
| | - John Tsiaoussis
- Laboratory of Anatomy, Medical School, University of Crete, Voutes, 71110 Heraklion, Crete, Greece
| | - Athanasios K Alegakis
- Laboratory of Toxicology, Medical School, University of Crete, Voutes, 71409 Heraklion, Crete, Greece
| | - Christina Tsitsimpikou
- General Chemical State Laboratory of Greece, Department of Hazardous Substances, Mixtures and Articles, 16 An. Tsocha Str, 1152 Athens, Greece
| | - Valerii N Rakitskii
- Federal Scientific Center of Hygiene, F.F. Erisman, Moscow, Russian Federation
| | - Félix Carvalho
- UCIBIO-REQUIMTE, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Aristidis M Tsatsakis
- Laboratory of Toxicology, Medical School, University of Crete, Voutes, 71409 Heraklion, Crete, Greece.
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Science-based decision matrix for the identification of endocrine disruptors for regulatory purposes. J Verbrauch Lebensm 2016. [DOI: 10.1007/s00003-016-1016-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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