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Tazart Z, Manganelli M, Scardala S, Buratti FM, Nigro Di Gregorio F, Douma M, Mouhri K, Testai E, Loudiki M. Remediation Strategies to Control Toxic Cyanobacterial Blooms: Effects of Macrophyte Aqueous Extracts on Microcystis aeruginosa (Growth, Toxin Production and Oxidative Stress Response) and on Bacterial Ectoenzymatic Activities. Microorganisms 2021; 9:microorganisms9081782. [PMID: 34442861 PMCID: PMC8400474 DOI: 10.3390/microorganisms9081782] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 08/11/2021] [Accepted: 08/12/2021] [Indexed: 11/16/2022] Open
Abstract
Increasing toxic cyanobacterial blooms in freshwater demand environmentally friendly solutions to control their growth and toxicity, especially in arid countries, where most drinking water is produced from surface reservoirs. We tested the effects of macrophyte allelochemicals on Microcystis aeruginosa and on the fundamental role of bacteria in nutrient recycling. The effects of Ranunculus aquatilis aqueous extract, the most bioactive of four Moroccan macrophyte extracts, were tested in batch systems on M. aeruginosa growth, toxin production and oxidative stress response and on the ectoenzymatic activity associated with the bacterial community. M. aeruginosa density was reduced by 82.18%, and a significant increase in oxidative stress markers was evidenced in cyanobacterial cells. Microcystin concentration significantly decreased, and they were detected only intracellularly, an important aspect in managing toxic blooms. R. aquatilis extract had no negative effects on associated bacteria. These results confirm a promising use of macrophyte extracts, but they cannot be generalized. The use of the extract on other toxic strains, such as Planktothrix rubescens, Raphidiopsis raciborskii and Chrysosporum ovalisporum, caused a reduction in growth rate but not in cyanotoxin content, increasing toxicity. The need to assess species-specific cyanobacteria responses to verify the efficacy and safety of the extracts for human health and the environment is highlighted.
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Affiliation(s)
- Zakaria Tazart
- Istituto Superiore di Sanità, Environment & Health Department, Viale Regina Elena, 299, 00161 Rome, Italy; (Z.T.); (S.S.); (F.M.B.); (F.N.D.G.); (E.T.)
- Water, Biodiversity and Climate Change Laboratory, Phycology, Biotechnology and Environmental Toxicology Research Unit, Faculty of Sciences Semlalia, Cadi Ayyad University, Av. Prince My Abdellah P.O. Box 2390, Marrakech 40000, Morocco; (K.M.); (M.L.)
| | - Maura Manganelli
- Istituto Superiore di Sanità, Environment & Health Department, Viale Regina Elena, 299, 00161 Rome, Italy; (Z.T.); (S.S.); (F.M.B.); (F.N.D.G.); (E.T.)
- Correspondence:
| | - Simona Scardala
- Istituto Superiore di Sanità, Environment & Health Department, Viale Regina Elena, 299, 00161 Rome, Italy; (Z.T.); (S.S.); (F.M.B.); (F.N.D.G.); (E.T.)
| | - Franca Maria Buratti
- Istituto Superiore di Sanità, Environment & Health Department, Viale Regina Elena, 299, 00161 Rome, Italy; (Z.T.); (S.S.); (F.M.B.); (F.N.D.G.); (E.T.)
| | - Federica Nigro Di Gregorio
- Istituto Superiore di Sanità, Environment & Health Department, Viale Regina Elena, 299, 00161 Rome, Italy; (Z.T.); (S.S.); (F.M.B.); (F.N.D.G.); (E.T.)
| | - Mountasser Douma
- Environmental Microbiology and Toxicology Research Unit, Polydisciplinary Faculty of Khouribga (FPK), Sultan Moulay Slimane University, Beni Mellal 23000, Morocco;
| | - Khadija Mouhri
- Water, Biodiversity and Climate Change Laboratory, Phycology, Biotechnology and Environmental Toxicology Research Unit, Faculty of Sciences Semlalia, Cadi Ayyad University, Av. Prince My Abdellah P.O. Box 2390, Marrakech 40000, Morocco; (K.M.); (M.L.)
| | - Emanuela Testai
- Istituto Superiore di Sanità, Environment & Health Department, Viale Regina Elena, 299, 00161 Rome, Italy; (Z.T.); (S.S.); (F.M.B.); (F.N.D.G.); (E.T.)
| | - Mohammed Loudiki
- Water, Biodiversity and Climate Change Laboratory, Phycology, Biotechnology and Environmental Toxicology Research Unit, Faculty of Sciences Semlalia, Cadi Ayyad University, Av. Prince My Abdellah P.O. Box 2390, Marrakech 40000, Morocco; (K.M.); (M.L.)
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Di Consiglio E, Darney K, Buratti FM, Turco L, Vichi S, Testai E, Lautz LS, Dorne JLCM. Human Variability in Carboxylesterases and carboxylesterase-related Uncertainty Factors for Chemical Risk Assessment. Toxicol Lett 2021; 350:162-170. [PMID: 34256091 DOI: 10.1016/j.toxlet.2021.07.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 06/24/2021] [Accepted: 07/08/2021] [Indexed: 10/20/2022]
Abstract
Carboxylesterases (CES) are an important class of enzymes involved in the hydrolysis of a range of chemicals and show large inter-individual variability in vitro. An extensive literature search was performed to identify in vivo probe substrates for CES1 and CES2 together with their protein content and enzymatic activity. Human pharmacokinetic (PK) data on Cmax, clearance, and AUC were extracted from 89 publications and Bayesian meta-analysis was performed using a hierarchical model to derive CES-related variability distributions and related uncertainty factors (UF). The CES-related variability indicated that 97.5% of healthy adults are covered by the kinetic default UF (3.16), except for clopidogrel and dabigatran etexilate. Clopidogrel is metabolised for a small amount by the polymorphic CYP2C19, which can have an impact on the overall pharmacokinetics, while the variability seen for dabigatran etexilate might be due to differences in the absorption, since this can be influenced by food intake. The overall CES-related variability was moderate to high in vivo (<CV 50%), which might be due to possible polymorphism in the enzyme but also to the small sample size available per chemical. The presented CES-related variability can be used in combination with in vitro data to derive pathway-specific distributions.
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Affiliation(s)
- E Di Consiglio
- Istituto Superiore di Sanità, Environment & Health Department, Viale Regina Elena 299, Roma, Italy
| | - K Darney
- Risk Assessment Department, French Agency for Food, Environmental and Occupational Health & Safety (Anses), 14 rue Pierre et Marie Curie, Maisons-Alfort, F-94701, France.
| | - F M Buratti
- Istituto Superiore di Sanità, Environment & Health Department, Viale Regina Elena 299, Roma, Italy
| | - L Turco
- Istituto Superiore di Sanità, Environment & Health Department, Viale Regina Elena 299, Roma, Italy
| | - S Vichi
- Istituto Superiore di Sanità, Environment & Health Department, Viale Regina Elena 299, Roma, Italy
| | - E Testai
- Istituto Superiore di Sanità, Environment & Health Department, Viale Regina Elena 299, Roma, Italy
| | - L S Lautz
- Risk Assessment Department, French Agency for Food, Environmental and Occupational Health & Safety (Anses), 14 rue Pierre et Marie Curie, Maisons-Alfort, F-94701, France; Wageningen Food Safety Research, Akkermaalsbos 2, 6708WB, Wageningen, the Netherlands
| | - J L C M Dorne
- European Food Safety Authority, Via Carlo Magno 1A, 43126, Parma, Italy
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Buratti FM, Darney K, Vichi S, Turco L, Di Consiglio E, Lautz LS, Béchaux C, Dorne JLCM, Testai E. Human variability in glutathione-S-transferase activities, tissue distribution and major polymorphic variants: Meta-analysis and implication for chemical risk assessment. Toxicol Lett 2020; 337:78-90. [PMID: 33189831 DOI: 10.1016/j.toxlet.2020.11.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 11/03/2020] [Accepted: 11/06/2020] [Indexed: 02/06/2023]
Abstract
The input into the QIVIVE and Physiologically-Based kinetic and dynamic models of drug metabolising enzymes performance and their inter-individual differences significantly improve the modelling performance, supporting the development and integration of alternative approaches to animal testing. Bayesian meta-analyses allow generating and integrating statistical distributions with human in vitro metabolism data for quantitative in vitro-in vivo extrapolation. Such data are lacking on glutathione-S-transferases (GSTs). This paper reports for the first time results on the human variability of GST activities in healthy individuals, their tissue localisation and the frequencies of their major polymorphic variants by means of extensive literature search, data collection, data base creation and meta-analysis. A limited number of papers focussed on in vivo GST inter-individual differences in humans. Ex-vivo total GST activity without discriminating amongst isozymes is generally reported, resulting in a high inter-individual variability. The highest levels of cytosolic GSTs in humans are measured in the kidney, liver, adrenal glands and blood. The frequencies of GST polymorphisms for cytosolic isozymes in populations of different geographical ancestry were also presented. Bayesian meta-analyses to derive GST-related uncertainty factors provided uncertain estimates, due to the limited database. Considering the relevance of GST activities and their pivotal role in cellular adaptive response mechanisms to chemical stressors, further studies are needed to identify GST probe substrates for specific isozymes and quantify inter-individual differences.
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Affiliation(s)
- Franca Maria Buratti
- Department of Environment and Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy.
| | - Keyvin Darney
- Risk Assessment Department, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), 14 rue Pierre et Marie Curie, Maisons-Alfort, F-94700, France
| | - Susanna Vichi
- Department of Environment and Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
| | - Laura Turco
- Department of Environment and Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
| | - Emma Di Consiglio
- Department of Environment and Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
| | - Leonie S Lautz
- Risk Assessment Department, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), 14 rue Pierre et Marie Curie, Maisons-Alfort, F-94700, France
| | - Camille Béchaux
- Risk Assessment Department, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), 14 rue Pierre et Marie Curie, Maisons-Alfort, F-94700, France
| | | | - Emanuela Testai
- Department of Environment and Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
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Darney K, Kasteel EEJ, Buratti FM, Turco L, Vichi S, Béchaux C, Roudot AC, Kramer NI, Testai E, Dorne JLCM, Di Consiglio E, Lautz LS. Bayesian meta-analysis of inter-phenotypic differences in human serum paraoxonase-1 activity for chemical risk assessment. Environ Int 2020; 138:105609. [PMID: 32114288 DOI: 10.1016/j.envint.2020.105609] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 02/19/2020] [Accepted: 02/22/2020] [Indexed: 06/10/2023]
Abstract
Human variability in paraoxonase-1 (PON1) activities is driven by genetic polymorphisms that affect the internal dose of active oxons of organophosphorus (OP) insecticides. Here, an extensive literature search has been performed to collect human genotypic frequencies (i.e. L55M, Q192R, and C-108T) in subgroups from a range of geographical ancestry and PON1 activities in three probe substrates (paraoxon, diazoxon and phenyl acetate). Bayesian meta-analyses were performed to estimate variability distributions for PON1 activities and PON1-related uncertainty factors (UFs), while integrating quantifiable sources of inter-study, inter-phenotypic and inter-individual differences. Inter-phenotypic differences were quantified using the population with high PON1 activity as the reference group. Results from the meta-analyses provided PON1 variability distributions and these can be implemented in generic physiologically based kinetic models to develop quantitative in vitro in vivo extrapolation models. PON1-related UFs in the Caucasian population were above the default toxicokinetic UF of 3.16 for two specific genotypes namely -108CC using diazoxon as probe substrate and, -108CT, -108TT, 55MM and 192QQ using paraoxon as probe substrate. However, integration of PON1 genotypic frequencies and activity distributions showed that all UFs were within the default toxicokinetic UF. Quantitative inter-individual differences in PON1 activity are important for chemical risk assessment particularly with regards to the potential sensitivity to organophosphates' toxicity.
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Affiliation(s)
- K Darney
- Risk Assessment Department, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), 14 rue Pierre et Marie Curie, Maisons-Alfort F-94700, France
| | - E E J Kasteel
- Institute for Risk Assessment Sciences, Utrecht University, 3508 TD Utrecht, the Netherlands
| | - F M Buratti
- Department of Environment and Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy
| | - L Turco
- Department of Environment and Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy
| | - S Vichi
- Department of Environment and Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy
| | - C Béchaux
- Risk Assessment Department, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), 14 rue Pierre et Marie Curie, Maisons-Alfort F-94700, France
| | - A C Roudot
- Laboratoire des Interactions Epithéliums Neurones, Université Bretagne Loire (UBL), UFR Sciences et Techniques, 6 Av. Victor Le Gorgeu, CS93837, Cedex 3, Brest 29238, France
| | - N I Kramer
- Institute for Risk Assessment Sciences, Utrecht University, 3508 TD Utrecht, the Netherlands
| | - E Testai
- Department of Environment and Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy
| | - J L C M Dorne
- European Food Safety Authority, 1a, Via Carlo Magno 1A, 43126 Parma, Italy
| | - E Di Consiglio
- Department of Environment and Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy
| | - L S Lautz
- Risk Assessment Department, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), 14 rue Pierre et Marie Curie, Maisons-Alfort F-94700, France.
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Santori N, Buratti FM, Scardala S, Dorne JLCM, Testai E. In vitro detoxication of microcystins in human samples: variability among variants with different hydrophilicity and structure. Toxicol Lett 2020; 322:131-139. [PMID: 31953209 DOI: 10.1016/j.toxlet.2020.01.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 01/07/2020] [Accepted: 01/11/2020] [Indexed: 10/25/2022]
Abstract
Cyanotoxins, among which >200 variants of Microcystins (MC), constitute an emerging issue in food safety. Microcystins (MC) toxicity is congener-specific; however, the in vitro inhibition of PP1/PP2A (the key molecular event of MC toxicity) by single MC variants is comparable and MC toxicokinetics seems to be the critical point. Here, the variability in GSH conjugation catalysed by human recombinant enzymes and human hepatic cytosol has been compared between hydrophilic (MC-LR and MC-RR) and hydrophobic (MC-LW, MC-YR and MC-LF) variants, according to measured logPow. In vitro detoxication reaction (spontaneous plus enzymatic) is favored by the variant hydrophilicity, with MC-LF very poorly detoxified. With MC-YR and -LW the spontaneous reaction always gave the major contribution, whereas with MC-LR and -RR the enzymatic reaction became by far predominant when GSH was depleted. Consequently, the well-known GST polymorphisms seems not to be the major driver for potential human variability in susceptibility towards the MC-toxicity, except for MC-RR and -LR when GSH is depleted. Looking at these results and literature data, MC-RR (the least cytotoxic and acutely toxic in rodents) is the more hydrophilic, has the lowest OATP-mediated hepatic uptake and the highest detoxication efficiency. The opposite is true for the most lipophilic MC-LF: once entered in the cells with the highest uptake, it is very poorly detoxified, and resulted as the most toxic in various cell types. MC-dependent TK should be considered in order to estimate the variability in toxicity and to support the use of quantitative in vitro-in vivo extrapolation models of single toxins and their mixtures co-occurring in the environment.
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Affiliation(s)
- Nicoletta Santori
- Istituto Superiore Di Sanità, Environment & Health Dept., Viale Regina Elena, 299, Rome Italy
| | - Franca Maria Buratti
- Istituto Superiore Di Sanità, Environment & Health Dept., Viale Regina Elena, 299, Rome Italy.
| | - Simona Scardala
- Istituto Superiore Di Sanità, Environment & Health Dept., Viale Regina Elena, 299, Rome Italy
| | | | - Emanuela Testai
- Istituto Superiore Di Sanità, Environment & Health Dept., Viale Regina Elena, 299, Rome Italy
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Manganelli M, Scardala S, Stefanelli M, Palazzo F, Funari E, Vichi S, Buratti FM, Testai E. Emerging health issues of cyanobacterial blooms. Ann Ist Super Sanita 2013; 48:415-28. [PMID: 23247138 DOI: 10.4415/ann_12_04_09] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This paper describes emerging issue related to cyanobacterial dynamics and toxicity and human health risks. Data show an increasing cyanobacteria expansion and dominance in many environments. However there are still few information on the toxic species fitness, or on the effects of specific drivers on toxin production. Open research fields are related to new exposure scenario (cyanotoxins in water used for haemodialysis and in food supplements); to new patterns of co-exposure between cyanotoxins and algal toxins and/or anthropogenic chemicals; to dynamics affecting toxicity and production of different cyanotoxin variants under environmental stress; to the accumulation of cyanotoxins in the food web. In addition, many data gaps exist in the characterization of the toxicological profiles, especially about long term effects.
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Affiliation(s)
- Maura Manganelli
- Dipartimento di Ambiente e Connessa Prevenzione Primaria, Istituto Superiore di Sanità, Rome, Italy.
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Buratti FM, De Angelis G, Ricceri L, Venerosi A, Calamandrei G, Testai E. Foetal and neonatal exposure to chlorpyrifos: Biochemical and metabolic alterations in the mouse liver at different developmental stages. Toxicology 2011; 280:98-108. [DOI: 10.1016/j.tox.2010.11.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Revised: 11/23/2010] [Accepted: 11/25/2010] [Indexed: 11/30/2022]
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Cometa MF, Buratti FM, Fortuna S, Lorenzini P, Volpe MT, Parisi L, Testai E, Meneguz A. Cholinesterase inhibition and alterations of hepatic metabolism by oral acute and repeated chlorpyrifos administration to mice. Toxicology 2007; 234:90-102. [PMID: 17382447 DOI: 10.1016/j.tox.2007.02.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2007] [Revised: 02/07/2007] [Accepted: 02/08/2007] [Indexed: 11/29/2022]
Abstract
Chlorpyrifos (CPF) is a broad spectrum organophosphorus insecticide bioactivated in vivo to chlorpyrifos-oxon (CPFO), a very potent anticholinesterase. A great majority of available animal studies on CPF and CPFO toxicity are performed in rats. The use of mice in developmental neurobehavioural studies and the availability of transgenic mice warrant a better characterization of CPF-induced toxicity in this species. CD1 mice were exposed to a broad range of acute (12.5-100.0mg/kg) and subacute (1.56-25mg/kg/day from 5 to 30 days) CPF oral doses. Functional and biochemical parameters such as brain and serum cholinesterase (ChE) and liver xenobiotic metabolizing system, including the biotransformation of CPF itself, have been studied and the no observed effect levels (NOELs) identified. Mice seem to be more susceptible than rats at least to acute CPF treatment (oral LD(50) 4.5-fold lower). The species-related differences were not so evident after repeated exposures. In mice a good correlation was observed between brain ChE inhibition and classical cholinergic signs of toxicity. After CPF-repeated treatment, mice seemed to develop some tolerance to CPF-induced effects, which could not be attributed to an alteration of P450-mediated CPF hepatic metabolism. CPF-induced effects on hepatic microsomal carboxylesterase (CE) activity and reduced glutathione (GSH) levels observed at an early stage of treatment and then recovered after 30 days, suggest that the detoxifying mechanisms are actively involved in the protection of CPF-induced effects and possibly in the induction of tolerance in long term exposure. The mouse could be considered a suitable experimental model for future studies on the toxic action of organophosphorus pesticides focused on mechanisms, long term and age-related effects.
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Affiliation(s)
- Maria Francesca Cometa
- Drug Research and Evaluation Dept, Istituto Superiore di Sanità, V le Regina Elena 299, Rome, Italy.
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