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Verhaegen C, Lepropre S, Octave M, Kautbally S, Bertrand L, Beauloye C, Jacques P, Horman S, Kefer J. Fe-based alloy for stent application inhibits platelet activation. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2019. [DOI: 10.1016/j.acvdsp.2019.02.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Michel L, Dubois-Deruy E, Gelinas R, Esfahani H, Roelants V, Bertrand L, Beauloye C, Balligand J. Cardiac myocyte-specific expression of beta3-adrenergic receptors sustains AMPK activation and glucose uptake while reducing hypertrophy following pressure overload. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2019. [DOI: 10.1016/j.acvdsp.2019.02.134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Volumenie JL, Bertrand L, Banydeen R, Pailla K, Ozier-Lafontaine E, Derancourt C. La vaginose bactérienne n’est pas un facteur de risque d’accouchement prématuré en population d’ascendance afro-caribéenne. Ann Dermatol Venereol 2018. [DOI: 10.1016/j.annder.2018.09.449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Bertrand L, Monferrán MV, Mouneyrac C, Amé MV. Native crustacean species as a bioindicator of freshwater ecosystem pollution: A multivariate and integrative study of multi-biomarker response in active river monitoring. CHEMOSPHERE 2018; 206:265-277. [PMID: 29753289 DOI: 10.1016/j.chemosphere.2018.05.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 04/24/2018] [Accepted: 05/01/2018] [Indexed: 06/08/2023]
Abstract
The aim of this study was to evaluate the ability of Palaemonetes argentinus to evidence the environmental degradation due to pollutants mixture in a freshwater aquatic ecosystem. For this purpose, an active monitoring (96 h exposure) was carried out in seven sites along the Ctalamochita River basin (Córdoba, Argentina), as a case of study. Our results evidenced sewage discharges impact in the water quality index, as well as metal pollution in water (Ag, Al, B, Pb, Hg) and sediments (Hg) with a potential effect on aquatic biota. The accumulation of total metals measured in exposed P. argentinus showed significant correlation with metals in water. Also, metallothioneins in cephalothorax showed significant changes along the basin, correlating with soluble concentrations of Cr, Zn, Cd, Hg, and V measured in shrimp tissues, which would be reflecting their bioavailability in the environment. In addition, the increase in antioxidant and detoxifying enzymes suggests the occurrence of oxidative stress in exposed shrimps. The integrative biomarker response index (IBR) pointed out the effect of metals on P. argentinus but also the occurrence of others pollutants. Finally, a high consensus was observed for water, sediments, and shrimps through the multivariate analysis (90%), indicating that P. argentinus can reflect changes in the abiotic matrixes. Moreover, studied sites were grouped according to their environmental quality. The use of active biomonitoring and the integration of biological responses through an IBR confirm that native biota could be a useful monitoring tool for bioavailable pollutants in aquatic ecosystems constituting a highly valuable approach.
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Lepropre S, Kautbally S, Octave M, Onselaer MB, Steinberg GR, Kemp BE, Wera O, Darley-Usmar VM, Ambroise J, Guigas B, Heemskerk J, Bertrand L, Oury C, Beauloye C, Horman S. P6066AMPK-ACC signaling modulates platelet phospholipids content and potentiate platelet function and thrombus formation. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kautbally S, Lepropre S, De Meester De Ravenstein C, Ambroise J, Z Boudjeltia K, Giera M, Oury C, Gerber B, Bertrand L, Horman S, Beauloye C. P6064Acetyl-coa carboxylase regulates platelet lipid content in coronary artery disease patients. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Dufeys C, Daskalopoulos EP, Noppe G, Bouzin C, Ginion A, Conway SJ, Papageorgiou AP, Balligand JL, Bertrand L, Beauloye C, Horman S. P935Specific invalidation of AMP-activated protein kinase alpha1 in cardiac fibroblasts exacerbates left ventricular remodeling following ischemia in mice. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kautbally S, Lepropre S, De Meester De Ravenstein C, Ambroise J, Boudjeltia K, Giera M, Oury C, Gerber B, Bertrand L, Horman S, Beauloye C. P6070Oxidized low-density lipoprotein, in contrast to inflammatory cytokines, activates AMPK-ACC signaling in human platelets. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Stokes L, Bertrand L, Colavecchia A, Roux R, Wanat M, Aparasu R. Evaluation of a pharmacy-led bedside medication delivery service at a comprehensive cancer center. Res Social Adm Pharm 2018. [DOI: 10.1016/j.sapharm.2018.04.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Verhaegen C, Lepropre S, Octave M, Kautbally S, Thomas A, Reuter S, Scarcello E, Lison D, Bertrand L, Delannay L, Jacques P, Beauloye C, Horman S, Kefer J. Fe-based bioresorbable alloy inhibits platelet activation. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2018. [DOI: 10.1016/j.acvdsp.2018.02.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Ferté L, Battault S, Van Steenbergen A, Ginion A, Koepsell H, Horman S, Bertrand L, Beauloye C. Contribution of SGLT1 in cardiac glucose uptake. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2018. [DOI: 10.1016/j.acvdsp.2018.02.033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Angé M, Castanares D, Bertrand L, Beauloye C, Horman S. a1AMPK protects against endothelial barrier dysfunction through regulation of CX43 expression and HSP27 phosphorylation. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2018. [DOI: 10.1016/j.acvdsp.2018.02.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Ballesteros ML, Rivetti NG, Morillo DO, Bertrand L, Amé MV, Bistoni MA. Multi-biomarker responses in fish (Jenynsia multidentata) to assess the impact of pollution in rivers with mixtures of environmental contaminants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 595:711-722. [PMID: 28407588 DOI: 10.1016/j.scitotenv.2017.03.203] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Revised: 03/20/2017] [Accepted: 03/21/2017] [Indexed: 06/07/2023]
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Dufeys C, Daskalopoulos E, Noppe G, Bouzin C, Conway S, De Pauw A, Balligand J, Bertrand L, Beauloye C, Horman S. 5917Role of fibroblastic AMP-activated protein kinase alpha1 in left ventricular remodeling after myocardial infarction. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.5917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Daskalopoulos E, Dufeys C, Sakamoto K, Bertrand L, Beauloye C, Horman S. P1093Influence of glycogen content in mouse heart on post-MI fibrosis and cardiac remodeling. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kautbally S, Lepropre S, Lerigoleur A, Gerber B, Kefer J, Castanares-Zapatero D, Eeckhoudt S, Oury C, Vanoverschelde JL, Bertrand L, Horman S, Beauloye C. P5369Platelet acetyl-coA carboxylase phosphorylation: a potential marker for atherothrombotic coronary artery disease. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p5369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Lepropre S, Kautbally S, Bertrand L, Steinberg G, Kemp B, Hego A, Wera O, Brouns S, Swieringa F, Heemskerk J, Oury C, Beauloye C, Horman S. P5375A default in acetyl-CoA carboxylase phosphorylation increases thrombus growth in vitro and in vivo, and in a collagen-dependent manner. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p5375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bonansea RI, Marino DJG, Bertrand L, Wunderlin DA, Amé MV. Tissue-specific bioconcentration and biotransformation of cypermethrin and chlorpyrifos in a native fish (Jenynsia multidentata) exposed to these insecticides singly and in mixtures. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2017; 36:1764-1774. [PMID: 27792835 DOI: 10.1002/etc.3613] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 05/09/2016] [Accepted: 09/03/2016] [Indexed: 06/06/2023]
Abstract
The aim of the present study was to evaluate the accumulation of cypermethrin and chlorpyrifos when the fish Jenynsia multidentata was exposed to these pesticides singly and in technical and commercial mixtures. Adult female fish were exposed over 96 h to 0.04 μg/L of cypermethrin; 0.4 μg/L of chlorpyrifos; 0.04 μg/L of cypermethrin + 0.4 μg/L of chlorpyrifos in a technical mixture; and 0.04 μg/L of cypermethrin + 0.4 μg/L of chlorpyrifos in a mixture of commercial products. Fish exposed to cypermethrin accumulated this compound only in muscle, probably because of the low biotransformation capacity of this organ and the induction of cytochrome P4501A1 (CYP1A1) expression in the liver. The accumulation of chlorpyrifos occurred in fish exposed to the insecticide (intestine > liver > gills) even when these fish had higher gluthatione-S-transferase (GST) activity in gills and P-glycoprotein (P-gp) expression in the liver, compared with the control. Fish exposed to the technical mixture showed cypermethrin accumulation (liver > intestine > gills) with higher levels than those measured in fish after only cypermethrin exposure. Higher expression levels of CYP1A1 in the liver were also observed compared with the Control. Fish exposed to the commercial mixture accumulated both insecticides (cypermethrin: intestine > gills and chlorpyrifos: liver > intestine > gills > muscle). In the organs where accumulation occurred, biotransformation enzymes were inhibited. Consequently, the commercial formulation exposure provoked the highest accumulation of cypermethrin and chlorpyrifos in J. multidentata, possibly associated with the biotransformation system inhibition. Environ Toxicol Chem 2017;36:1764-1774. © 2016 SETAC.
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Dufeys C, Daskalopoulos E, Bouzin C, Conway S, Bertrand L, Beauloye C, Horman S. Role of cardiac fibroblast AMPKα1 in left ventricular remodeling after myocardial infarction. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2017. [DOI: 10.1016/s1878-6480(17)30438-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kautbally S, Lerigoleur A, Lepropre S, Gerber B, Kefer J, Eeckhoudt S, Oury C, Vanoverschelde J, Bertrand L, Horman S, Beauloye C. Coronary and extra-coronary atherosclerotic development is associated with an increase inflammation and thrombin generation markers: a substudy of ACCTHEROMA Clinical Trial. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2017. [DOI: 10.1016/s1878-6480(17)30453-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Thoury M, Mille B, Séverin-Fabiani T, Robbiola L, Réfrégiers M, Jarrige JF, Bertrand L. High spatial dynamics-photoluminescence imaging reveals the metallurgy of the earliest lost-wax cast object. Nat Commun 2016; 7:13356. [PMID: 27843139 PMCID: PMC5116070 DOI: 10.1038/ncomms13356] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 09/26/2016] [Indexed: 01/03/2023] Open
Abstract
Photoluminescence spectroscopy is a key method to monitor defects in semiconductors from nanophotonics to solar cell systems. Paradoxically, its great sensitivity to small variations of local environment becomes a handicap for heterogeneous systems, such as are encountered in environmental, medical, ancient materials sciences and engineering. Here we demonstrate that a novel full-field photoluminescence imaging approach allows accessing the spatial distribution of crystal defect fluctuations at the crystallite level across centimetre-wide fields of view. This capacity is illustrated in archaeology and material sciences. The coexistence of two hitherto indistinguishable non-stoichiometric cuprous oxide phases is revealed in a 6,000-year-old amulet from Mehrgarh (Baluchistan, Pakistan), identified as the oldest known artefact made by lost-wax casting and providing a better understanding of this fundamental invention. Low-concentration crystal defect fluctuations are readily mapped within ZnO nanowires. High spatial dynamics-photoluminescence imaging holds great promise for the characterization of bulk heterogeneous systems across multiple disciplines. Photoluminescence is a powerful probe of chemical composition and structure, but it is challenging to image heterogeneous materials over large scale. Thoury et al. develop a full-field imaging approach to map two cuprous oxide phases in the earliest known lost-wax cast artefact manufactured 6,000 years ago.
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Bertrand L, Monferrán MV, Mouneyrac C, Bonansea RI, Asis R, Amé MV. Sensitive biomarker responses of the shrimp Palaemonetes argentinus exposed to chlorpyrifos at environmental concentrations: Roles of alpha-tocopherol and metallothioneins. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 179:72-81. [PMID: 27588703 DOI: 10.1016/j.aquatox.2016.08.014] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 07/15/2016] [Accepted: 08/23/2016] [Indexed: 06/06/2023]
Abstract
The aim of this study was to evaluate the toxic effects of chlorpyrifos (CPF) at environmental concentrations on the shrimp Palaemonetes argentinus, a South American native species. Organisms were exposed to environmentally relevant concentrations of CPF (from 3.5 to 94.5ngCPFL(-1)) at laboratory conditions for 96h. A wide battery of biochemical responses including bioaccumulation, damage and defense biomarkers were measured in cephalothorax and abdomen of shrimp. The concentration of CPF was below the detection limit of the method in both body sectors (8ngCPFg(-1)ww), probably indicating fast biotransformation of the parental compound. Our results showed that CPF exposure inhibits acetylcholinesterase activity from 3.5ngCPFL(-1), a concentration below the suggested Argentinean guidelines for the protection of aquatic biota. Moreover, oxidative stress was evidenced by increased H2O2 content and increased levels of TBARs and carbonyl groups in proteins. The induction of antioxidant enzymes like catalase, glutathione S-transferase and glutathione peroxidase seems not be sufficient to prevent oxidative damages. In addition, the mobilization of α-tocopherol from abdomen to cephalothorax was observed and reported for the first time in non-reproductive condition. Likewise, a strong diminution of metallothioneins occurred in cephalothorax from the lowest CPF concentration while induction occurred from the same treatment in abdomen as an oxidative stress response. Finally, significant correlation between Integrated Biomarker Response values and exposure concentrations suggest the usefulness of P. argentinus as bioindicator of CPF exposure at concentrations as low as environmental ones.
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Craps J, Joris V, De Jongh B, Sonveaux P, Horman S, Lengelé B, Bertrand L, Many MC, Colin IM, Gérard AC. Involvement of mTOR and Regulation by AMPK in Early Iodine Deficiency-Induced Thyroid Microvascular Activation. Endocrinology 2016; 157:2545-59. [PMID: 27035650 DOI: 10.1210/en.2015-1911] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Iodine deficiency (ID) induces TSH-independent microvascular activation in the thyroid via the reactive oxygen species/nitric oxide-hypoxia-inducible factor-1α/vascular endothelial growth factor (VEGF) pathway. We hypothesized the additional involvement of mammalian target of rapamycin (mTOR) as a positive regulator of this pathway and AMP-activated protein kinase (AMPK) as a negative feedback regulator to explain the transient nature of ID-induced microvascular changes under nonmalignant conditions. mTOR and AMPK involvement was investigated using an in vitro model (human thyrocytes in primary cultures) and 2 murine models of goitrogenesis (normal NMRI and RET-PTC mice [a papillary thyroid cancer model]). In NMRI mice, ID had no effect on the phosphorylation of ribosomal S6 kinase (p70S6K), a downstream target of mTOR. However, rapamycin inhibited ID-induced thyroid blood flow and VEGF protein expression. In the RET-PTC model, ID strongly increased the phosphorylation of p70S6K, whereas rapamycin completely inhibited the ID-induced increase in p70S6K phosphorylation, thyroid blood flow, and VEGF-A expression. In vitro, although ID increased p70S6K phosphorylation, the ID-stimulated hypoxia-inducible factor/VEGF pathway was inhibited by rapamycin. Activation of AMPK by metformin inhibited ID effects both in vivo and in vitro. In AMPK-α1 knockout mice, the ID-induced increase in thyroid blood flow and VEGF-A protein expression persisted throughout the treatment, whereas both parameters returned to control values in wild-type mice after 4 days of ID. In conclusion, mTOR is required for early ID-induced thyroid microvascular activation. AMPK negatively regulates this pathway, which may account for the transient nature of ID-induced TSH-independent vascular effects under benign conditions.
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Podio NS, López-Froilán R, Ramirez-Moreno E, Bertrand L, Baroni MV, Pérez-Rodríguez ML, Sánchez-Mata MC, Wunderlin DA. Matching in Vitro Bioaccessibility of Polyphenols and Antioxidant Capacity of Soluble Coffee by Boosted Regression Trees. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:9572-82. [PMID: 26457815 DOI: 10.1021/acs.jafc.5b04406] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The aim of this study was to evaluate changes in polyphenol profile and antioxidant capacity of five soluble coffees throughout a simulated gastro-intestinal digestion, including absorption through a dialysis membrane. Our results demonstrate that both polyphenol content and antioxidant capacity were characteristic for each type of studied coffee, showing a drop after dialysis. Twenty-seven compounds were identified in coffee by HPLC-MS, while only 14 of them were found after dialysis. Green+roasted coffee blend and chicory+coffee blend showed the highest and lowest content of polyphenols and antioxidant capacity before in vitro digestion and after dialysis, respectively. Canonical correlation analysis showed significant correlation between the antioxidant capacity and the polyphenol profile before digestion and after dialysis. Furthermore, boosted regression trees analysis (BRT) showed that only four polyphenol compounds (5-p-coumaroylquinic acid, quinic acid, coumaroyl tryptophan conjugated, and 5-O-caffeoylquinic acid) appear to be the most relevant to explain the antioxidant capacity after dialysis, these compounds being the most bioaccessible after dialysis. To our knowledge, this is the first report matching the antioxidant capacity of foods with the polyphenol profile by BRT, which opens an interesting method of analysis for future reports on the antioxidant capacity of foods.
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Griboff J, Morales D, Bertrand L, Bonansea RI, Monferrán MV, Asis R, Wunderlin DA, Amé MV. Oxidative stress response induced by atrazine in Palaemonetes argentinus: the protective effect of vitamin E. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2014; 108:1-8. [PMID: 25038265 DOI: 10.1016/j.ecoenv.2014.06.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 06/17/2014] [Accepted: 06/20/2014] [Indexed: 06/03/2023]
Abstract
The widespread contamination and persistence of the herbicide atrazine residues in the environment resulted in the exposure of non-target organisms. The present study was undertaken to investigate the effect of atrazine in the response of oxidative stress biomarkers in the freshwater shrimp Palaemonetes argentinus and the protective effect of vitamin-E against atrazine-induced toxicity. Therefore, two batches of P. argentinus were fed for 21 days with a commercial food enriched in proteins (D1) or with D2, composed of D1 enriched with vitamin-E (6.8 and 16.0mg% of vitamin-E, respectively). Subsequently, half of the individuals of each group were exposed to atrazine (0.4mgL(-1)) for 24h and the others remained as controls. Atrazine promoted oxidative stress response in P. argentinus fed with D1 as indicated by enhanced H2O2 content and induction of superoxide dismutase, glutathione-S-transferases and glutathione reductase. This antioxidant activity would prevent the increment of thiobarbituric acid reactive substances in the shrimp tissues. P. argentinus fed with D2 reversed the response of the biomarkers measured. However, the activation of antioxidants response had an energetic cost, which was revealed by a decrease in lipids storage in shrimps. These results show the modulatory effect of vit-E on oxidative stress and its potential use as an effective antioxidant to be applied in chemoprotection strategies during aquaculture.
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