Sylvie Biagianti-Risbourg

Sylvie Biagianti-Risbourg
Université de Reims Champagne-Ardenne | URCA · Département de Biologie, Biochimie, Terre et Environnement

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49
Publications
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Publications

Publications (49)
Article
Full-text available
The Kerguelen Islands include various species of freshwater fish such as brown trout (Salmo trutta). These trout are among the most isolated from direct anthropogenic impact worldwide. This study was designed to analyse cadmium (Cd) and copper (Cu) concentrations in the liver of Kerguelen brown trout, and to assess the possible impacts of these met...
Article
Full-text available
Environmental characteristics in water and sediments of two contrasted coastal Mediterranean lagoons, Bages-Sigean and Canet-St Nazaire, were measured over a three season survey. The urban pollution (treatment plant discharges) is very important in Canet-St Nazaire lagoon reflecting untreated sewages, while in Bages-Sigean, the northern part appear...
Chapter
DefinitionAcclimation as well as adaptation, resistance, or tolerance can be defined as the ability of organisms to cope with stress, either natural such as temperature changes, salinity variations, oxygen level fluctuations, and plant toxins or chemicals depending on anthropogenic inputs of many different classes of contaminants into the environme...
Article
Antioxidative defenses and more especially catalasic activity (CAT) are studied in a large range of scientific research thematics. In environmental sciences, the problematic of oxidative stress is of great interest as pollutants can induce perturbations of redox homeostasis. Consequently, changes in antioxidative defenses levels in fish tissues and...
Article
Full-text available
A 12-month active biomonitoring study was performed in 2008-2009 on the Vesle river basin (Champagne-Ardenne, France) using the freshwater mussel Dreissena polymorpha as a sentinel species; allochthonous mussels originating from a reference site (Commercy) were exposed at four sites (Bouy, Sept-Saulx, Fismes, Ardre) within the Vesle river basin. Se...
Article
The Subantarctic Kerguelen Islands (49°S, 70°E) contain freshwater ecosystems among the most isolated in the world. Concentrations of polychlorinated biphenyls (PCBs) were assessed in the muscle of 48 brook trout and 38 brown trout caught during summer and spring 2006 in the rivers, lakes and ponds of Kerguelen. The sum of 29 PCBs averaged 404 and...
Article
Full-text available
A 12-month active biomonitoring study was performed in 2008-2009 on a northern French river system using the freshwater mussel Dreissena polymorpha as a sentinel species. Allochtonous mussels originating from a reference site (Commercy) were caged at four sites (Bouy, Sept-Saulx, Fismes, Ardre) within the Vesle River basin. The main objective of th...
Conference Paper
The polar and subpolar ecosystems receive persistent organic pollutants (POP) by atmospheric transfer. PCBs (polychlorinated biphenyls) and other ubiquitous organochlorines were detected from the late sixties. In subpolar areas, the snow acts as a dynamic reservoir. A multidisciplinary study funded by the French National Research Agency (ANR Risker...
Article
It is often difficult to evaluate the level of contamination in small urban rivers because pollution is mainly diffuse, with low levels of numerous substances. The use of a coupled approach using both chemical and biological measurements may provide an integrated evaluation of the impact of micro-pollution on the river. Zebra mussels were transplan...
Article
Full-text available
Tubifex is the only animal reported to respond with autotomy to contamination. This response of contaminated worm is understood as a mode of metal excretion. Few data concern the potential of organic compounds to induce tubifex autotomy. The objective of this study was to investigate if autotomy can be induced by a herbicide isoproturon (IP) and be...
Article
Full-text available
The subantarctic Kerguelen Islands (49°S, 70°E) contain freshwaters among the most isolated in the world from direct human activities. Cadmium and copper concentrations were analyzed in muscle and liver tissues of 57 non-migratory brook trout (Salvelinus fontinalis) inhabiting the Sud River of Kerguelen Islands. The mean cadmium concentration in li...
Presentation
Full-text available
En France, la limite septentrionale de l'aire de répartition du Sonneur à ventre jaune (Bombina variegata L.) passe par le sud du département des Ardennes, la Marne et l'Aisne. D'après les écrits bibliographiques qui concernent cette zone géographique, le Sonneur était présent bien plus au nord au début du XXè siècle. Par ailleurs, plusieurs cas d'...
Article
Knowledge of the subcellular behavior of toxicants, mainly metals, in living organisms is fundamental for understanding their toxicological consequences at individual and trans-generation levels and throughout the food web. However, different partitioning methodologies are available in the literature, particularly concerning the cytosolic fraction....
Article
Full-text available
Activity profiles of amylase and carboxymethylcellulase (CMCase) were investigated in the crystalline style (CS) and the digestive diverticulae (DD) of the freshwater mussel Dreissena polymorpha. In both digestive tissues, highest amylase activities were measured at pH 6.5-7.5 and 25-30°C while highest CMCase activities were measured at pH 5.0-6.0...
Article
The feeding activity and afterward the assimilation of the products resulting of the food digestion, allow organisms to obtain energy useful for growth, maintenance and reproduction. These biological parameters may be studied to assess the impact of contaminants on the energy metabolism of organisms, which could induce potential effects at an indiv...
Article
Full-text available
The aim of this study was to compare environmental quality in two sites in western Ukraine—rural (R) and urbanized (U)—with the usage of the resident bivalve mollusk Anodonta cygnea. The study was realized during three seasons. The metal uptake and a set of biochemical markers were determined. For each season, Cd and metallothioneins (MTs) contents...
Article
Abstract –  Otoliths preserve a continuous record of the life cycle from the natal through the adult stage. For that reason, the morphological and chemical characteristics of otoliths of two nonnative Salmonids, brown trout (Salmo trutta) and brook charr (Salvelinus fontinalis) from populations on the Kerguelen Islands were compared. Several approa...
Article
Chitosan is a natural polymer which has the property to elicit the natural defenses mechanism in plant and which can be an interesting biopesticides. It is then necessary to investigate the potential toxicity of chitosan for aquatic animal health. Metallothioneins (MTs) are low molecular weight proteins, mainly implicated in metal ion detoxificatio...
Article
A rapid and inexpensive method for simultaneous quantification of terbumeton (TER), and its major potential metabolites (TED; terbumeton-desethyl, TOH; terbumeton-2-hydroxy and TID; terbumeton-deisopropyl) in soil bulk water (SBW) samples is proposed. The analytical method involves extraction–concentration from SBW samples using a graphitized carbo...
Article
Good knowledge of the relationship between toxic metals and biological systems, particularly the sub-cellular fraction, could be a suitable early indicator of toxic effects. These effects and the sub-cellular behaviour of cadmium were studied with a widely used species in freshwater toxicity bioassays, Daphnia magna. In spite of this very commonpla...
Article
Copper is a trace element essential to life, but also a heavy metal with toxic effect clearly demonstrated. Cu induced perturbations in fish liver are well documented but the variability of the reported results is large. In this study two cyprinids, zebrafish and roach, were exposed to copper. Reported histocytological changes are either adaptative...
Article
Metallothioneins (MTs), are low molecular weight proteins, mainly implicated in metal ion detoxification. Increase in MT contents is considered as a specific biomarker of metal exposure. Recently it has been demonstrated that MTs participate in several cellular functions such as regulation of growth, and antioxidative defences. Tubifex tubifex were...
Article
Full-text available
Metallothioneins (MTs) are low molecular weight proteins, mainly implicated in metal ion detoxification. Increase in MT contents is considered to be a specific biomarker of metal exposure. Recently it has been demonstrated that MTs participate in several cellular functions such as regulation of growth, and antioxidative defenses. Therefore, the ind...
Article
Laboratory studies were conducted to determine the effects of different concentrations of fenhexamid (0.1, 1, and 10 mg L(-1)) on growth, oxidative stress, protein, glycogen, and metallothionein (MT) contents in Tubifex tubifex after an exposure of 2, 4, and 7 days. In addition, residues of the fungicide were followed in water and in the worms. In...
Article
Metallothioneins (MTs) are low-molecular-weight proteins mainly involved in metal ion detoxification. Recently it has been demonstrated that MTs participate in several cellular functions such as regulation of growth and antioxidative defenses. Moreover, pesticides can induce their synthesis. The aim of the current work was to determine the effects...
Article
A variety of stresses, hormones, glucocorticoids and cytokines are known to induce metallothioneins (MTs) in animals. The aim of this study was to investigate the effects of chemical stress induced by the dicarboximide fungicide procymidone on hepatic structure, MT content and antioxidative defences (catalase and glutathione reductase activities an...
Article
Acute toxicity, accumulation and histological effects produced by various concentrations of platinum (H2PtCl6) in the intestine of Brachydanio rerio were investigated. Degenerative (lysis and necrosis of mucosal cells, changes in submucosa structure) and adaptative (fusion between villi) responses were revealed. The extent and the severity of the i...
Article
Métallothioneins (MTs) show important induction of their synthesis when animals are exposed to metals. Consequently these proteins were proposed as biomarkers of metallic contamination and numerous studies investigate the impact of metals on MTs level in aquatic organisms. However aquatic ecosystems are frequently contaminated by a mix of pollutant...
Article
The aim of this study was to compare biochemical and (ultra)structural perturbations induced by Cu in the liver of Brachydanio rerio exposed for 14 days to sublethal concentrations of copper and then replaced for 14 days to clean water. Toxicity of Cu was clearly demonstrated: simultaneously to Cu accumulation, the liver developed large lysed areas...
Article
Although Tubifex tubifex (Oligochaeta, Tubificida) has been proposed as a test organism for ecotoxocological studies, very few data concerning sublethal toxicity and bioaccumulation are available on this worm. The aims of this work were to assess the toxicity of cadmium, one of the most toxic metals frequently encountered in polluted areas, on T. t...
Article
Metallothioneins (MTs) have important roles in the homeostasis of essential metals and in the detoxication of heavy metals. They also represent a potential indicator of aquatic contamination by metals. Routine methods are needed for MTs quantification in ecotoxicological studies. This paper investigates the possibility to use the spectrofluorescent...
Article
This paper studies the subacute toxicity of various metallic contaminants (copper, lead and platinum) already or potentially present in the environment. We used as a test organism a freshwater invertebrate, Lumbriculus variegatus (Annelid, Oligochaeta), widespread in this area. This worm reproduces only asexually (architomical scissiparity) and the...
Article
The aquatic oligochaete Tubifex tubifex is known to be very resistant to pollution, however, the way this organism has adapted is poorly understood. T. tubifex was present in our study-site (Reuil sur Marne, Marne, France), a retention basin that receives contaminated runoff water from a vineyard. Field observations showed that a large proportion o...
Article
The shape, number and distribution of the chaetae constitute taxonomic criteria in oligochaetes. Paradoxically, there is a lack of morphological data on the chaetal apparatus of Tubifex tubifex. This study provides a detailed description (number, (ultra)structure and spatial arrangement) of the chaetae of normal worms, to serve as a reference for s...
Article
The kinetic of bioaccumulation and depuration as well as the ultrastructural perturbations induced in the anterior intestine of Brachydanio rerio by 16 μg.l.1 of platinum were reported. Enterocytic responses were rapid and reversible, adaptative (reduction in the lengh of the apical microvilli, increase in the number of cellular structures known to...
Article
Reproduction of Lumbriculus variegatus occurs quite exclusively by architomical scissiparity, and this Oligochaete therefore shows a high capacity of regeneration. After experimental ablation of the anterior part of the worm, by a median cut, the posterior part of the worm regenerated the cephalic region (8 segments) in 7 days (20°C, in spring or d...
Article
Previous work suggested that the oligochaeta T. tubifex may tolerate the contamination of its environment by Cu and Pb by accumulating these metals in the caudal region and by subsequently autotomizing the latter. The aim of the present study was to investigate whether these phenomena may be observed with other metals such as Cd, for example. Acute...
Article
La procymidone[N-(3,5 dichlorophényl)-1,2 diméthylcyclopropane-1,2 dicarboximide] est une molécule utilisée pour ses capacités antifongiques principalement dans la lutte contre Botrytis et Sclerotinia. Elle présente une rémanence de plusieurs semaines dans l'environnement et est donc susceptible de contaminer, après lessivage des sols, les milieux...
Article
Acetone has been used to solubilize liposoluble molecules in toxicological tests using fish. The effects over time of a sublethal concentration (0.1%) of acetone on the livers of trout sac-fry (Oncorhynchus mykiss) were investigated by electron microscopy. Changes in the hepatocyte membranes (dilation of the interhepatocytic space, formation of int...
Article
Acute toxicity tests were conducted on the oligochaete Tubifex tubifex with Cu and/or Pb, in static (without renewal of the medium during the test) and semi-static (with a daily renewal of the medium) conditions. LC 50-96 h and cumulated mortality were obtained. The results show that T. tubifex is more sensitive to Cu than to Pb, that the renewal o...
Article
Simultaneous influence of pH and temperature on binding and remobilization of Pb in sand was experimentally studied. Adsorption was slightly lower at pH 4 than at pH 9. Temperature (10, 20 and 30°C) had no influence on that adsorption. Very small quantities of Pb were released (2 to 4%) by lowering the pH from 9 to 4 indicating that Pb was strongly...
Article
Full-text available
The acute toxicity and bioaccumulation (rates, kinetic) of tetravalent platinum in Lumbriculus variegatus under different physicochemical conditions (temperature and total water hardness) were investigated. Increased Pt4+ concentration (from 0.05 to 50 mg/L), exposure (up to 30 days), temperature (from 4 to 20 degrees C) and decreasing water hardne...
Article
The acute toxicity and bioaccumulation (rates, kinetic) of tetravalent platinum in Lumbriculus variegatus under different physicochemical conditions (temperature and total water hardness) were investigated. Increased Pt⁴⁺ concentration (from 0.5 to 50 mg/L), exposure (up to 30 days), temperature (from 4 to 20°C) and decreasing water hardness (from...
Article
Chronological effects produced by 0.17 mg 1−1 atrazine in the liver of juvenile grey mullets (Liza sp) were investigated by means of light and electron microscopy. Fish primarily reacted (day 3 to 9) with a substantial increase in the size of lipid droplets (adaptive change) and lipofuscin granules. After 21 days of contamination, liver lipoid dege...

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