1
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The role of surface activity on the amyloid fibrillation pathway of bovine serum albumin upon interaction with glyphosate. Int J Biol Macromol 2023; 226:1166-1177. [PMID: 36427623 DOI: 10.1016/j.ijbiomac.2022.11.230] [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: 09/25/2022] [Revised: 11/20/2022] [Accepted: 11/21/2022] [Indexed: 11/25/2022]
Abstract
As an active ingredient in its derivative products, glyphosate has emerged as the most widespread herbicide in recent decades. Bovine serum albumin (BSA) as a carrier protein may be adversely affected by structural changes due to binding affinity with glyphosate, which may lead to dysfunctionality or metabolic disorders. This study aimed to investigate the interaction of glyphosate with BSA and its thermal fibrillation pathway employing techniques such as dynamic surface tension, fluorescence quenching, ThT binding, circular dichroism spectroscopy, and reactive oxygen species (ROS) measurement, as well as molecular dynamics (MD) studies. The adsorption dynamic analysis suggested hydrophobic moiety at higher concentrations of glyphosate upon interaction with BSA. MD results suggested a slight fluctuation due to glyphosate interaction with protein molecules. The carboxy group presented in glyphosate made a hydrogen bond with the hydroxyl group of TYR147. The fluorescence quenching and diffusion studies approved BSA's increased unfolding and hydrophobicity resulting from glyphosate interaction, which would induce fibrillation/aggregation, according to our fibrillation kinetics data. The surface activity of glyphosate at higher concentrations and its approved involvement in structural changes of BSA through hydrogen bonding may raise concerns about its potential side effect on farm animals and the food cycle.
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2
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Lech JC, Dorfsman SI, Répás Z, Krüger TPJ, Gyalai IM, Boros LG. What to feed or what not to feed-that is still the question. Metabolomics 2021; 17:102. [PMID: 34800193 PMCID: PMC8605975 DOI: 10.1007/s11306-021-01855-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 11/08/2021] [Indexed: 12/02/2022]
Abstract
INTRODUCTION This review addresses metabolic diversities after grain feeding of cattle using artificial total mixed ration (TMR), in place of pasture-based feeding. OBJECTIVES To determine how grain feeding impairs the deuterium-depleting functions of the anaplerotic mitochondrial matrix during milk and meat production. METHODS Based on published data we herein evaluate how grain-fed animals essentially follow a branched-chain amino acid and odd-chain fatty acid-based reductive carboxylation-dependent feedstock, which is also one of the mitochondrial deuterium-accumulating dysfunctions in human cancer. RESULTS It is now evident that food-based intracellular deuterium exchange reactions, especially that of glycogenic substrate oxidation, are significant sources of deuterium-enriched (2H; D) metabolic water with a significant impact on animal and human health. The burning of high deuterium nutritional dairy products into metabolic water upon oxidation in the human body may contribute to similar metabolic conditions and diseases as described in state-of-the-art articles for cows. Grain feeding also limits oxygen delivery to mitochondria for efficient deuterium-depleted metabolic water production by glyphosate herbicide exposure used in genetically modified crops of TMR constituents. CONCLUSION Developments in medical metabolomics, biochemistry and deutenomics, which is the science of biological deuterium fractionation and discrimination warrant urgent critical reviews in order to control the epidemiological scale of population diseases such as diabetes, obesity and cancer by a thorough understanding of how the compromised metabolic health of grain-fed dairy cows impacts human consumers.
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Affiliation(s)
- James C Lech
- Faculty of Science, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
- National Research Foundation, Pretoria, South Africa
- International EMF Project & Optical Radiation, World Health Organization, Pretoria, South Africa
- Department of Radiology and Nuclear Medicine, Academic Medical Center, University of Amsterdam (UMC), Amsterdam, The Netherlands
| | | | - Zoltán Répás
- Institute of Food Science, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Tjaart P J Krüger
- Department of Physics, University of Pretoria, Pretoria, South Africa
- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
| | | | - László G Boros
- SiDMAP, LLC and the Deutenomics Science Institute, Los Angeles, CA, USA.
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3
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da Silva NDG, Carneiro CEA, Campos EVR, de Oliveira JL, Risso WE, Fraceto LF, Zaia DAM, Martinez CBR. Interference of goethite in the effects of glyphosate and Roundup® on ZFL cell line. Toxicol In Vitro 2020; 65:104755. [PMID: 31881238 DOI: 10.1016/j.tiv.2019.104755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 11/28/2019] [Accepted: 12/22/2019] [Indexed: 12/18/2022]
Abstract
Goethite (α-FeOOH) brings important perspectives in environmental remediation, as, due to its physicochemical properties, this iron oxide can adsorb a wide variety of compounds, including glyphosate. This study aimed to evaluate the effects of goethite nanoparticles (NPs), glyphosate (Gly), Roundup® (Rd), and co-exposures (Gly + NPs and Rd + NPs) on zebrafish liver cell line (ZFL). ZFL cells were exposed to NPs (1, 10, and 100 mg L-1), Gly (3.6 mg L-1), Rd (10 mg L-1), and co-exposures (Gly + NPs and Rd + NPs), or only to saline for 1, 6, and 12 h. Cell viability was assessed by Trypan blue, MTT, and neutral red assays. The generation of reactive oxygen species and total antioxidant capacity were also determined, while genotoxicity was quantified by the comet assay. Both NPs and Rd in isolation produced cytotoxic effects at 6 h and genotoxic effects at 1 and 6 h. Rd + NPs resulted in synergistic effects, intensifying the toxicity. Cells exposed to Gly did not present toxic effects and Gly + NPs resulted in the suppression of toxic effects observed for NPs. The presence of other components in Roundup® seems to favor its toxicity compared to the active ingredient. In conclusion, according to the in vitro model, the concentrations used were not safe for the ZFL lineage.
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Affiliation(s)
- Natara D G da Silva
- Programa de Pós-Graduação em Ciências Biológicas, Universidade Estadual de Londrina - UEL, Londrina, Paraná, Brazil
| | - Cristiane E A Carneiro
- Departamento de Química, Universidade Estadual de Londrina - UEL, Londrina, Paraná, Brazil
| | - Estefânia V R Campos
- Departamento de Engenharia Ambiental, Universidade Estadual Paulista - UNESP, Sorocaba, São Paulo, Brazil
| | - Jhones L de Oliveira
- Departamento de Engenharia Ambiental, Universidade Estadual Paulista - UNESP, Sorocaba, São Paulo, Brazil
| | - Wagner E Risso
- Departamento de Ciências Fisiológicas, Universidade Estadual de Londrina - UEL, Londrina, Paraná, Brazil
| | - Leonardo F Fraceto
- Departamento de Engenharia Ambiental, Universidade Estadual Paulista - UNESP, Sorocaba, São Paulo, Brazil
| | - Dimas A M Zaia
- Departamento de Química, Universidade Estadual de Londrina - UEL, Londrina, Paraná, Brazil
| | - Cláudia B R Martinez
- Programa de Pós-Graduação em Ciências Biológicas, Universidade Estadual de Londrina - UEL, Londrina, Paraná, Brazil; Departamento de Ciências Fisiológicas, Universidade Estadual de Londrina - UEL, Londrina, Paraná, Brazil.
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4
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Jiang Z, Lu X, Geng S, Ma H, Liu B. Structuring of sunflower oil by stearic acid derivatives: Experimental and molecular modelling studies. Food Chem 2020; 324:126801. [PMID: 32353654 DOI: 10.1016/j.foodchem.2020.126801] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 03/20/2020] [Accepted: 04/12/2020] [Indexed: 02/08/2023]
Abstract
Structuring of vegetable oils has potential application in food, pharmaceutical and cosmetic products. In this study, structuring effects of stearic acid derivatives on sunflower seed oil were systematically investigated by experimental and molecular simulation methods. Stearic acid (SA), 12-hydroxy stearic acid (HSA) and 2-hydroxyethyl stearate (HES) were able to structure sunflower seed oil, among which the structuring ability of HES was reported for the first time. The oleogel formed with HSA exhibited good mechanical properties (such as hardness, fracturability, adhesiveness, chewiness and storage modulus), which coincided with its highest solid fat content and degree of crystallinity. Oleogels containing SA and HES showed similar mechanical properties. Both the molecular dynamics (MD) simulation and independent gradient model (IGM) confirmed that the HSA dimer possessed the strongest interaction during the self-assembly process while the dimers of HES and SA had similar interactions, which could explain their structuring performance.
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Affiliation(s)
- Zhaojing Jiang
- School of Food Science, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Xuanxuan Lu
- Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China; Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, NJ 08901, United States
| | - Sheng Geng
- School of Food Science, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Hanjun Ma
- School of Food Science, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Benguo Liu
- School of Food Science, Henan Institute of Science and Technology, Xinxiang 453003, China.
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5
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Gunatilake S, Seneff S, Orlando L. Glyphosate's Synergistic Toxicity in Combination with Other Factors as a Cause of Chronic Kidney Disease of Unknown Origin. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:E2734. [PMID: 31370256 PMCID: PMC6695815 DOI: 10.3390/ijerph16152734] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 07/29/2019] [Accepted: 07/30/2019] [Indexed: 12/22/2022]
Abstract
Chronic kidney disease of unknown etiology (CKDu) is a global epidemic. Sri Lanka has experienced a doubling of the disease every 4 or 5 years since it was first identified in the North Central province in the mid-1990s. The disease primarily affects people in agricultural regions who are missing the commonly known risk factors for CKD. Sri Lanka is not alone: health workers have reported prevalence of CKDu in Mexico, Nicaragua, El Salvador, and the state of Andhra Pradesh in India. A global search for the cause of CKDu has not identified a single factor, but rather many factors that may contribute to the etiology of the disease. Some of these factors include heat stroke leading to dehydration, toxic metals such as cadmium and arsenic, fluoride, low selenium, toxigenic cyanobacteria, nutritionally deficient diet and mycotoxins from mold exposure. Furthermore, exposure to agrichemicals, particularly glyphosate and paraquat, are likely compounding factors, and may be the primary factors. Here, we argue that glyphosate in particular is working synergistically with most of the other factors to increase toxic effects. We propose, further, that glyphosate causes insidious harm through its action as an amino acid analogue of glycine, and that this interferes with natural protective mechanisms against other exposures. Glyphosate's synergistic health effects in combination with exposure to other pollutants, in particular paraquat, and physical labor in the ubiquitous high temperatures of lowland tropical regions, could result in renal damage consistent with CKDu in Sri Lanka.
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Affiliation(s)
- Sarath Gunatilake
- Health Science Department, California State University Long Beach, Long Beach, CA 90840, USA
| | - Stephanie Seneff
- Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
| | - Laura Orlando
- Environmental Health Department, Boston University School of Public Health, Boston, MA 02118, USA
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6
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Lopes Catão AJ, López-Castillo A. On the degradation pathway of glyphosate and glycine. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2018; 20:1148-1157. [PMID: 29987286 DOI: 10.1039/c8em00119g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The degradation in water of the most widespread herbicide, glyphosate, is still under debate. Experimental disagreements on this process exist and there are only a few theoretical studies to support any conclusions. Moreover, the relationship between glyphosate and glycine is underestimated. Besides the structural similarity, glycine is a product of glyphosate degradation; hence, their studies are complementary. In this study, two mechanisms for the decomposition of the glyphosate molecule and glycine molecule in water are proposed. These mechanisms were explored by using quantum mechanical calculations. A combined microsolvation/PCM approach was employed to find and characterize their transition states, by which the reaction pathways were determined via the IRC method. The results have shown that the degradation processes might occur via a C-C bond cleavage, through a concerted mechanism, whereby the proton transfers and the CO2 detachments occur simultaneously. The second mechanism had two consecutive steps, a decarboxylation followed by the proton transfers. The water molecules served as a conduit for the proton transfers, away from the amine group (or the phosphonate, glyphosate case). Their function was to assist the reactions in a water-mediated decarboxylation. In these particular cases, the free energy of activation was 42.68 and 42.28 kcal mol-1 for the glycine structure and the glyphosate structure, respectively. These results agreed with the photodegradation and thermodegradation of glyphosate, as well as with the spontaneous decarboxylation of glycine. A concerted mechanism might be expected to yield C-P and C-N bond cleavages in the glyphosate molecule.
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Affiliation(s)
- Anderson José Lopes Catão
- Chemistry Department, Universidade Federal de São Carlos, Rod. Washington Luís km 235 - SP-310, São Carlos CEP 13565-905, Brazil.
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7
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Milan M, Dalla Rovere G, Smits M, Ferraresso S, Pastore P, Marin MG, Bogialli S, Patarnello T, Bargelloni L, Matozzo V. Ecotoxicological effects of the herbicide glyphosate in non-target aquatic species: Transcriptional responses in the mussel Mytilus galloprovincialis. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 237:442-451. [PMID: 29505984 DOI: 10.1016/j.envpol.2018.02.049] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 01/26/2018] [Accepted: 02/16/2018] [Indexed: 06/08/2023]
Abstract
Glyphosate has been the most widely used herbicide worldwide over the last three decades, raising increasing concerns for its potential impacts on environmental and human health. Recent studies revealed that glyphosate occurs in soil, surface water, and groundwater, and residues are found at all levels of the food chain, such as drinking water, plants, animals, and even in humans. While research has demonstrated that glyphosate can induce a broad range of biological effects in exposed organisms, the global molecular mechanisms of action still need to be elucidated, in particular for marine species. In this study, we characterized for the first time the molecular mechanisms of action of glyphosate in a marine bivalve species after exposure to environmentally realistic concentrations. To reach such a goal, Mediterranean mussels Mytilus galloprovincialis, an ecologically and economically relevant species, were exposed for 21 days to 10, 100, and 1000 μg/L and digestive gland transcriptional profiles were investigated through RNA-seq. Differential expression analysis identified a total of 111, 124, and 211 differentially regulated transcripts at glyphosate concentrations of 10, 100, and 1000 μg/L, respectively. Five genes were found consistently differentially expressed at all investigated concentrations, including SERP2, which plays a role in the protection of unfolded target proteins against degradation, the antiapoptotic protein GIMAP5, and MTMR14, which is involved in macroautophagy. Functional analysis of differentially expressed genes reveals the disruption of several key biological processes, such as energy metabolism and Ca2+ homeostasis, cell signalling, and endoplasmic reticulum stress response. Together, the results obtained suggest that the presence of glyphosate in the marine ecosystem should raise particular concern because of its significant effects even at the lowest concentration.
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Affiliation(s)
- M Milan
- Department of Comparative Biomedicine and Food Science, University of Padova, Viale dell'Università 16, 35020 Legnaro, PD, Italy.
| | - G Dalla Rovere
- Department of Comparative Biomedicine and Food Science, University of Padova, Viale dell'Università 16, 35020 Legnaro, PD, Italy
| | - M Smits
- Department of Comparative Biomedicine and Food Science, University of Padova, Viale dell'Università 16, 35020 Legnaro, PD, Italy; Marine Environmental Science Laboratory (LEMAR), Université de Bretagne Occidentale -Rue Dumont d'Urville, 29280 Plouzané - IUEM Technopole Brest-Iroise, France
| | - S Ferraresso
- Department of Comparative Biomedicine and Food Science, University of Padova, Viale dell'Università 16, 35020 Legnaro, PD, Italy
| | - P Pastore
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - M G Marin
- Department of Biology, University of Padova, Via Ugo Bassi 58/B, 35131 Padova, Italy
| | - S Bogialli
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - T Patarnello
- Department of Comparative Biomedicine and Food Science, University of Padova, Viale dell'Università 16, 35020 Legnaro, PD, Italy
| | - L Bargelloni
- Department of Comparative Biomedicine and Food Science, University of Padova, Viale dell'Università 16, 35020 Legnaro, PD, Italy; CONISMA - Consorzio Nazionale Interuniversitario per le Scienze del Mare, Roma, Italy
| | - V Matozzo
- Department of Biology, University of Padova, Via Ugo Bassi 58/B, 35131 Padova, Italy
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8
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Milić M, Žunec S, Micek V, Kašuba V, Mikolić A, Lovaković BT, Semren TŽ, Pavičić I, Čermak AMM, Pizent A, Vrdoljak AL, Valencia-Quintana R, Sánchez-Alarcón J, Želježić D. Oxidative stress, cholinesterase activity, and DNA damage in the liver, whole blood, and plasma of Wistar rats following a 28-day exposure to glyphosate. Arh Hig Rada Toksikol 2018; 69:154-168. [PMID: 29990293 DOI: 10.2478/aiht-2018-69-3114] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 06/01/2018] [Indexed: 11/21/2022] Open
Abstract
In this 28 day-study, we evaluated the effects of herbicide glyphosate administered by gavage to Wistar rats at daily doses equivalent to 0.1 of the acceptable operator exposure level (AOEL), 0.5 of the consumer acceptable daily intake (ADI), 1.75 (corresponding to the chronic population-adjusted dose, cPAD), and 10 mg kg-1 body weight (bw) (corresponding to 100 times the AOEL). At the end of each treatment, the body and liver weights were measured and compared with their baseline values. DNA damage in leukocytes and liver tissue was estimated with the alkaline comet assay. Oxidative stress was evaluated using a battery of endpoints to establish lipid peroxidation via thiobarbituric reactive substances (TBARS) level, level of reactive oxygen species (ROS), glutathione (GSH) level, and the activity of glutathione peroxidase (GSH-Px). Total cholinesterase activity and the activities of acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) were also measured. The exposed animals gained less weight than control. Treatment resulted in significantly higher primary DNA damage in the liver cells and leukocytes. Glyphosate exposure significantly lowered TBARS in the liver of the AOEL, ADI, and cPAD groups, and in plasma in the AOEL and cPAD group. AChE was inhibited with all treatments, but the AOEL and ADI groups significantly differed from control. Total ChE and plasma/liver ROS/GSH levels did not significantly differ from control, except for the 35 % decrease in ChE in the AOEL and ADI groups and a significant drop in liver GSH in the cPAD and 100xAOEL groups. AOEL and ADI blood GSH-Px activity dropped significantly, but in the liver it significantly increased in the ADI, cPAD, and 100xAOEL groups vs. control. All these findings show that even exposure to low glyphosate levels can have serious adverse effects and points to a need to change the approach to risk assessment of low-level chronic/sub-chronic glyphosate exposure, where oxidative stress is not necessarily related to the genetic damage and AChE inhibition.
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Affiliation(s)
- Mirta Milić
- Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | - Suzana Žunec
- Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | - Vedran Micek
- Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | - Vilena Kašuba
- Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | - Anja Mikolić
- Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | | | | | - Ivan Pavičić
- Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | | | - Alica Pizent
- Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | | | - Rafael Valencia-Quintana
- Laboratorio "Rafael Villalobos-Pietrini" de Toxicología Genómica y Química Ambiental, Facultad de Agrobiología, Universidad Autónoma de Tlaxcala, Tlaxcala, Mexico
| | - Juana Sánchez-Alarcón
- Laboratorio "Rafael Villalobos-Pietrini" de Toxicología Genómica y Química Ambiental, Facultad de Agrobiología, Universidad Autónoma de Tlaxcala, Tlaxcala, Mexico
| | - Davor Želježić
- Institute for Medical Research and Occupational Health, Zagreb, Croatia
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Mesnage R, Phedonos A, Biserni M, Arno M, Balu S, Corton JC, Ugarte R, Antoniou MN. Evaluation of estrogen receptor alpha activation by glyphosate-based herbicide constituents. Food Chem Toxicol 2017; 108:30-42. [PMID: 28711546 DOI: 10.1016/j.fct.2017.07.025] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 06/20/2017] [Accepted: 07/11/2017] [Indexed: 01/05/2023]
Abstract
The safety, including the endocrine disruptive capability, of glyphosate-based herbicides (GBHs) is a matter of intense debate. We evaluated the estrogenic potential of glyphosate, commercial GBHs and polyethoxylated tallowamine adjuvants present as co-formulants in GBHs. Glyphosate (≥10,000 μg/L or 59 μM) promoted proliferation of estrogen-dependent MCF-7 human breast cancer cells. Glyphosate also increased the expression of an estrogen response element-luciferase reporter gene (ERE-luc) in T47D-KBluc cells, which was blocked by the estrogen antagonist ICI 182,780. Commercial GBH formulations or their adjuvants alone did not exhibit estrogenic effects in either assay. Transcriptomics analysis of MCF-7 cells treated with glyphosate revealed changes in gene expression reflective of hormone-induced cell proliferation but did not overlap with an ERα gene expression biomarker. Calculation of glyphosate binding energy to ERα predicts a weak and unstable interaction (-4.10 kcal mol-1) compared to estradiol (-25.79 kcal mol-1), which suggests that activation of this receptor by glyphosate is via a ligand-independent mechanism. Induction of ERE-luc expression by the PKA signalling activator IBMX shows that ERE-luc is responsive to ligand-independent activation, suggesting a possible mechanism of glyphosate-mediated activation. Our study reveals that glyphosate, but not other components present in GBHs, can activate ERα in vitro, albeit at relatively high concentrations.
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Affiliation(s)
- Robin Mesnage
- Gene Expression and Therapy Group, King's College London, Faculty of Life Sciences & Medicine, Department of Medical and Molecular Genetics, 8th Floor, Tower Wing, Guy's Hospital, Great Maze Pond, London SE1 9RT, United Kingdom
| | - Alexia Phedonos
- Gene Expression and Therapy Group, King's College London, Faculty of Life Sciences & Medicine, Department of Medical and Molecular Genetics, 8th Floor, Tower Wing, Guy's Hospital, Great Maze Pond, London SE1 9RT, United Kingdom
| | - Martina Biserni
- Gene Expression and Therapy Group, King's College London, Faculty of Life Sciences & Medicine, Department of Medical and Molecular Genetics, 8th Floor, Tower Wing, Guy's Hospital, Great Maze Pond, London SE1 9RT, United Kingdom
| | - Matthew Arno
- Genomics Centre, King's College London, Waterloo Campus, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - Sucharitha Balu
- Genomics Centre, King's College London, Waterloo Campus, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - J Christopher Corton
- Integrated Systems Toxicology Division, US Environmental Protection Agency, 109 T.W. Alexander Dr MD-B143-06, Research Triangle Park, NC 27711, United States
| | - Ricardo Ugarte
- Instituto de Ciencias Químicas, Facultad de Ciencias, Universidad Austral de Chile, Independencia 641, Valdivia, Chile
| | - Michael N Antoniou
- Gene Expression and Therapy Group, King's College London, Faculty of Life Sciences & Medicine, Department of Medical and Molecular Genetics, 8th Floor, Tower Wing, Guy's Hospital, Great Maze Pond, London SE1 9RT, United Kingdom.
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10
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Liu B, Xiao H, Li J, Geng S, Ma H, Liang G. Interaction of phenolic acids with trypsin: Experimental and molecular modeling studies. Food Chem 2017; 228:1-6. [PMID: 28317701 DOI: 10.1016/j.foodchem.2017.01.126] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 01/10/2017] [Accepted: 01/26/2017] [Indexed: 01/15/2023]
Abstract
Trypsin is a kind of protease for digestion and food processing, whose activity can be inhibited by phenolic acids in plant foods. However, most reports explained the inhibitory difference of phenolic acids based on the number and position of substituent groups, which failed to reveal the comprehensive inhibitory mechanism. In this work, the inhibitory effects of 11 common phenolic acids on trypsin were investigated. Amongst the tested cinnamic and benzoic acid derivatives, caffeic acid and gallic acid showed the strongest anti-trypsin activity with a noncompetitive inhibition pattern, respectively. The fluorescence analysis displayed that both the quenching rate constant (Kq) and binding constant (KA) of caffeic acid were higher than those of gallic acid. Molecular docking illustrated their different binding modes with trypsin. The ONIOM calculations revealed that the binding capacity of caffeic acid was higher than that of gallic acid, which could explain their difference in their inhibitory behaviors.
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Affiliation(s)
- Benguo Liu
- School of Food Science, Henan Institute of Science and Technology, Xinxiang 453003, PR China
| | - Huizhi Xiao
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, School of Bioengineering, Chongqing University, Chongqing 400044, PR China
| | - Jiaqi Li
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, School of Bioengineering, Chongqing University, Chongqing 400044, PR China
| | - Sheng Geng
- School of Food Science, Henan Institute of Science and Technology, Xinxiang 453003, PR China
| | - Hanjun Ma
- School of Food Science, Henan Institute of Science and Technology, Xinxiang 453003, PR China
| | - Guizhao Liang
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, School of Bioengineering, Chongqing University, Chongqing 400044, PR China.
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11
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Mesnage R, Renney G, Séralini GE, Ward M, Antoniou MN. Multiomics reveal non-alcoholic fatty liver disease in rats following chronic exposure to an ultra-low dose of Roundup herbicide. Sci Rep 2017; 7:39328. [PMID: 28067231 PMCID: PMC5220358 DOI: 10.1038/srep39328] [Citation(s) in RCA: 108] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 11/22/2016] [Indexed: 02/07/2023] Open
Abstract
The impairment of liver function by low environmentally relevant doses of glyphosate-based herbicides (GBH) is still a debatable and unresolved matter. Previously we have shown that rats administered for 2 years with 0.1 ppb (50 ng/L glyphosate equivalent dilution; 4 ng/kg body weight/day daily intake) of a Roundup GBH formulation showed signs of enhanced liver injury as indicated by anatomorphological, blood/urine biochemical changes and transcriptome profiling. Here we present a multiomic study combining metabolome and proteome liver analyses to obtain further insight into the Roundup-induced pathology. Proteins significantly disturbed (214 out of 1906 detected, q < 0.05) were involved in organonitrogen metabolism and fatty acid β-oxidation. Proteome disturbances reflected peroxisomal proliferation, steatosis and necrosis. The metabolome analysis (55 metabolites altered out of 673 detected, p < 0.05) confirmed lipotoxic conditions and oxidative stress by showing an activation of glutathione and ascorbate free radical scavenger systems. Additionally, we found metabolite alterations associated with hallmarks of hepatotoxicity such as γ-glutamyl dipeptides, acylcarnitines, and proline derivatives. Overall, metabolome and proteome disturbances showed a substantial overlap with biomarkers of non-alcoholic fatty liver disease and its progression to steatohepatosis and thus confirm liver functional dysfunction resulting from chronic ultra-low dose GBH exposure.
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Affiliation(s)
- Robin Mesnage
- Gene Expression and Therapy Group, King’s College London, Faculty of Life Sciences & Medicine, Department of Medical and Molecular Genetics, 8th Floor, Tower Wing, Guy’s Hospital, Great Maze Pond, London SE1 9RT, United Kingdom
| | - George Renney
- Proteomics Facility, King’s College London, Institute of Psychiatry, London SE5 8AF, United Kingdom
| | - Gilles-Eric Séralini
- University of Caen, Institute of Biology, EA 2608 and Risk Pole, MRSH-CNRS, Esplanade de la Paix, University of Caen, Caen 14032, Cedex, France
| | - Malcolm Ward
- Proteomics Facility, King’s College London, Institute of Psychiatry, London SE5 8AF, United Kingdom
| | - Michael N. Antoniou
- Gene Expression and Therapy Group, King’s College London, Faculty of Life Sciences & Medicine, Department of Medical and Molecular Genetics, 8th Floor, Tower Wing, Guy’s Hospital, Great Maze Pond, London SE1 9RT, United Kingdom
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Schaumburg LG, Siroski PA, Poletta GL, Mudry MD. Genotoxicity induced by Roundup® (Glyphosate) in tegu lizard (Salvator merianae) embryos. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2016; 130:71-78. [PMID: 27155487 DOI: 10.1016/j.pestbp.2015.11.009] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 10/10/2015] [Accepted: 11/25/2015] [Indexed: 05/27/2023]
Abstract
Environmental contaminants produce multiple adverse consequences at individual, population and ecosystem levels. High volumes of agrochemicals applied to great variety of crops, together with agricultural expansion, generate great concerns due to the impact for the environment and large risk implicated for wildlife. The lack of data on these threats is striking. The tegu lizard (Salvator merianae) is one of the species that live in environments under contaminant effects. Several characteristics allow proposing this species as a potential sentinel organism for the monitoring of pesticides in their habitat. The present study is the first report about genotoxicity in tegu lizard neonates after embryonic exposure to Roundup® (glyphosate 66.2%). The micronucleus test (MN), nuclear abnormalities (NAs) assay and comet assay (CA) were used as biomarkers of genotoxic effects induced in erythrocytes by topical exposure of the eggs to the glyphosate commercial formulation Roundup® (RU), in laboratory controlled conditions. A total of 96 eggs were distributed in six groups exposed to RU (50, 100, 200, 400, 800, 1600μg/egg), one positive control (PC; 200μg cyclophosphamide/egg) and one negative control (NC; distilled water). No teratogenic effects were observed in any of the exposed or control neonates. A significant increase in DNA damage was observed in all concentrations higher than 100μg/egg with respect to NC (p<0.05). However, no statistical differences were found in the frequencies of MN and NAs in any group exposed to RU compared to the NC. No statistically significant differences were found in the size of the lizards at birth or after six months post-exposure (p>0.05). Our results provide new information about the undesirable effects of the glyphosate-based herbicide formulations RU on this lizard species that inhabits areas permanently exposed to several pesticide formulations. We consider of utmost necessity a strict regulation of the agrochemical application conditions in those environments near to places where wild populations of terrestrial and aquatic species live, in order to minimize the adverse effects on ecosystems.
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Affiliation(s)
- Laura G Schaumburg
- Grupo de Investigación en Biología Evolutiva (GIBE), IEGEBA (CONICET-UBA), FCEyN, - Pabellón II - 4to Piso. Labs 43-46. Cdad. Universitaria, Intendente Güiraldes 2160, CP: 1428EGA Buenos Aires, Argentina; Laboratorio de Zoología Aplicada: Anexo Vertebrados (FHUC, UNL/MASPyMA), Aristóbulo del Valle 8700, CP: 3000, Santa Fe, Argentina.
| | - Pablo A Siroski
- Laboratorio de Zoología Aplicada: Anexo Vertebrados (FHUC, UNL/MASPyMA), Aristóbulo del Valle 8700, CP: 3000, Santa Fe, Argentina; Instituto de Ciencias Veterinarias del Litoral (ICiVet-CONICET), R.P. Kreder 2805, CP: S3080HOF Esperanza, Santa Fe, Argentina
| | - Gisela L Poletta
- Grupo de Investigación en Biología Evolutiva (GIBE), IEGEBA (CONICET-UBA), FCEyN, - Pabellón II - 4to Piso. Labs 43-46. Cdad. Universitaria, Intendente Güiraldes 2160, CP: 1428EGA Buenos Aires, Argentina; Laboratorio de Zoología Aplicada: Anexo Vertebrados (FHUC, UNL/MASPyMA), Aristóbulo del Valle 8700, CP: 3000, Santa Fe, Argentina; Cátedra de Toxicología, Farmacología y Bioquímica Legal (FBCB, UNL), Ciudad Universitaria Paraje El Pozo, CP: 3000, Santa Fe, Argentina
| | - Marta D Mudry
- Grupo de Investigación en Biología Evolutiva (GIBE), IEGEBA (CONICET-UBA), FCEyN, - Pabellón II - 4to Piso. Labs 43-46. Cdad. Universitaria, Intendente Güiraldes 2160, CP: 1428EGA Buenos Aires, Argentina
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Vannini A, Guarnieri M, Bačkor M, Bilová I, Loppi S. Uptake and toxicity of glyphosate in the lichen Xanthoria parietina (L.) Th. Fr. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2015; 122:193-7. [PMID: 26247898 DOI: 10.1016/j.ecoenv.2015.07.030] [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: 04/27/2015] [Revised: 07/22/2015] [Accepted: 07/27/2015] [Indexed: 06/04/2023]
Abstract
This study investigated if treatment of the lichen Xanthoria parietina (L.) Th. Fr. with glyphosate caused uptake of this herbicide as well as physiological alterations. Samples were treated with Glifene SL®, a common commercial glyphosate-based herbicide, at the lowest recommended doses (3.6g/L) as well as with doses slightly higher than the highest suggested (36 g/L). The results clearly showed glyphosate uptake in X. parietina proportionally to the dose provided. Adverse physiological effects were evident on the photosynthetic apparatus (photosynthetic efficiency, chlorophyll a content, chlorophyll degradation) as well as on the fungal respiration rates and cell membrane integrity (ergosterol content, dehydrogenase activity) already after 24h from treatment, also at the low application dose. It is concluded that lichens are suitable organisms for monitoring unwanted biological effects from the application of glyphosate-based herbicides, as well as for detecting the accumulation of this compound in the biota, thus screening for its environmental fate.
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Affiliation(s)
- Andrea Vannini
- Department of Life Sciences, University of Siena, via P.A. Mattioli 4, I-53100 Siena, Italy.
| | - Massimo Guarnieri
- Department of Life Sciences, University of Siena, via P.A. Mattioli 4, I-53100 Siena, Italy
| | - Martin Bačkor
- Institute of Biology and Ecology, P.J. Šafárik University, Manesova 23, 040 01 Košice, Slovakia
| | - Ivana Bilová
- Institute of Biology and Ecology, P.J. Šafárik University, Manesova 23, 040 01 Košice, Slovakia
| | - Stefano Loppi
- Department of Life Sciences, University of Siena, via P.A. Mattioli 4, I-53100 Siena, Italy
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Mesnage R, Defarge N, Spiroux de Vendômois J, Séralini GE. Potential toxic effects of glyphosate and its commercial formulations below regulatory limits. Food Chem Toxicol 2015; 84:133-53. [PMID: 26282372 DOI: 10.1016/j.fct.2015.08.012] [Citation(s) in RCA: 288] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 08/10/2015] [Accepted: 08/11/2015] [Indexed: 01/05/2023]
Abstract
Glyphosate-based herbicides (GlyBH), including Roundup, are the most widely used pesticides worldwide. Their uses have increased exponentially since their introduction on the market. Residue levels in food or water, as well as human exposures, are escalating. We have reviewed the toxic effects of GlyBH measured below regulatory limits by evaluating the published literature and regulatory reports. We reveal a coherent body of evidence indicating that GlyBH could be toxic below the regulatory lowest observed adverse effect level for chronic toxic effects. It includes teratogenic, tumorigenic and hepatorenal effects. They could be explained by endocrine disruption and oxidative stress, causing metabolic alterations, depending on dose and exposure time. Some effects were detected in the range of the recommended acceptable daily intake. Toxic effects of commercial formulations can also be explained by GlyBH adjuvants, which have their own toxicity, but also enhance glyphosate toxicity. These challenge the assumption of safety of GlyBH at the levels at which they contaminate food and the environment, albeit these levels may fall below regulatory thresholds. Neurodevelopmental, reproductive, and transgenerational effects of GlyBH must be revisited, since a growing body of knowledge suggests the predominance of endocrine disrupting mechanisms caused by environmentally relevant levels of exposure.
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Affiliation(s)
- R Mesnage
- University of Caen, Institute of Biology and Network on Risks, Quality and Sustainable Environment (MRSH), Esplanade de la Paix, 14032 Caen Cedex, France; CRIIGEN, 81 rue de Monceau, 75008 Paris, France
| | - N Defarge
- University of Caen, Institute of Biology and Network on Risks, Quality and Sustainable Environment (MRSH), Esplanade de la Paix, 14032 Caen Cedex, France; CRIIGEN, 81 rue de Monceau, 75008 Paris, France
| | | | - G E Séralini
- University of Caen, Institute of Biology and Network on Risks, Quality and Sustainable Environment (MRSH), Esplanade de la Paix, 14032 Caen Cedex, France; CRIIGEN, 81 rue de Monceau, 75008 Paris, France.
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Mesnage R, Arno M, Costanzo M, Malatesta M, Séralini GE, Antoniou MN. Transcriptome profile analysis reflects rat liver and kidney damage following chronic ultra-low dose Roundup exposure. Environ Health 2015; 14:70. [PMID: 26302742 PMCID: PMC4549093 DOI: 10.1186/s12940-015-0056-1] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 08/11/2015] [Indexed: 05/17/2023]
Abstract
BACKGROUND Glyphosate-based herbicides (GBH) are the major pesticides used worldwide. Converging evidence suggests that GBH, such as Roundup, pose a particular health risk to liver and kidneys although low environmentally relevant doses have not been examined. To address this issue, a 2-year study in rats administering 0.1 ppb Roundup (50 ng/L glyphosate equivalent) via drinking water (giving a daily intake of 4 ng/kg bw/day of glyphosate) was conducted. A marked increased incidence of anatomorphological and blood/urine biochemical changes was indicative of liver and kidney structure and functional pathology. In order to confirm these findings we have conducted a transcriptome microarray analysis of the liver and kidneys from these same animals. RESULTS The expression of 4224 and 4447 transcript clusters (a group of probes corresponding to a known or putative gene) were found to be altered respectively in liver and kidney (p < 0.01, q < 0.08). Changes in gene expression varied from -3.5 to 3.7 fold in liver and from -4.3 to 5.3 in kidneys. Among the 1319 transcript clusters whose expression was altered in both tissues, ontological enrichment in 3 functional categories among 868 genes were found. First, genes involved in mRNA splicing and small nucleolar RNA were mostly upregulated, suggesting disruption of normal spliceosome activity. Electron microscopic analysis of hepatocytes confirmed nucleolar structural disruption. Second, genes controlling chromatin structure (especially histone-lysine N-methyltransferases) were mostly upregulated. Third, genes related to respiratory chain complex I and the tricarboxylic acid cycle were mostly downregulated. Pathway analysis suggests a modulation of the mTOR and phosphatidylinositol signalling pathways. Gene disturbances associated with the chronic administration of ultra-low dose Roundup reflect a liver and kidney lipotoxic condition and increased cellular growth that may be linked with regeneration in response to toxic effects causing damage to tissues. Observed alterations in gene expression were consistent with fibrosis, necrosis, phospholipidosis, mitochondrial membrane dysfunction and ischemia, which correlate with and thus confirm observations of pathology made at an anatomical, histological and biochemical level. CONCLUSION Our results suggest that chronic exposure to a GBH in an established laboratory animal toxicity model system at an ultra-low, environmental dose can result in liver and kidney damage with potential significant health implications for animal and human populations.
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Affiliation(s)
- Robin Mesnage
- Gene Expression and Therapy Group, Faculty of Life Sciences & Medicine, Department of Medical and Molecular Genetics, King's College London, 8th Floor Tower Wing, Guy's Hospital, Great Maze Pond, London, SE1 9RT, UK
| | - Matthew Arno
- Genomics Centre, King's College London, Waterloo Campus, 150 Stamford Street, London, SE1 9NH, UK
| | - Manuela Costanzo
- Department of Neurological and Movement Sciences, University of Verona, Verona, 37134, Italy
| | - Manuela Malatesta
- Department of Neurological and Movement Sciences, University of Verona, Verona, 37134, Italy
| | - Gilles-Eric Séralini
- Institute of Biology, EA 2608 and Risk Pole, MRSH-CNRS, Esplanade de la Paix, University of Caen, Caen, 14032, Cedex, France
| | - Michael N Antoniou
- Gene Expression and Therapy Group, Faculty of Life Sciences & Medicine, Department of Medical and Molecular Genetics, King's College London, 8th Floor Tower Wing, Guy's Hospital, Great Maze Pond, London, SE1 9RT, UK.
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